use std::{
    collections::HashMap,
    io,
    path::{Path, PathBuf},
    sync::{Arc, atomic::AtomicUsize},
    time::Duration,
};

use anyhow::anyhow;
use async_trait::async_trait;
use command_group::AsyncGroupChild;
use db::{
    DBService,
    models::{
        execution_process::{
            ExecutionContext, ExecutionProcess, ExecutionProcessRunReason, ExecutionProcessStatus,
        },
        executor_session::ExecutorSession,
        merge::Merge,
        project::Project,
        scratch::{DraftFollowUpData, Scratch, ScratchType},
        task::{Task, TaskStatus},
        task_attempt::TaskAttempt,
    },
};
use deployment::{DeploymentError, RemoteClientNotConfigured};
use executors::{
    actions::{
        Executable, ExecutorAction, ExecutorActionType,
        coding_agent_follow_up::CodingAgentFollowUpRequest,
        coding_agent_initial::CodingAgentInitialRequest,
    },
    approvals::{ExecutorApprovalService, NoopExecutorApprovalService},
    env::ExecutionEnv,
    executors::{BaseCodingAgent, ExecutorExitResult, ExecutorExitSignal, InterruptSender},
    logs::{
        NormalizedEntryType,
        utils::{
            ConversationPatch,
            patch::{escape_json_pointer_segment, extract_normalized_entry_from_patch},
        },
    },
    profile::ExecutorProfileId,
};
use futures::{FutureExt, StreamExt, TryStreamExt, stream::select};
use serde_json::json;
use services::services::{
    analytics::AnalyticsContext,
    approvals::{Approvals, executor_approvals::ExecutorApprovalBridge},
    config::Config,
    container::{ContainerError, ContainerRef, ContainerService},
    diff_stream::{self, DiffStreamHandle},
    git::{Commit, DiffTarget, GitService},
    image::ImageService,
    notification::NotificationService,
    queued_message::QueuedMessageService,
    share::SharePublisher,
    worktree_manager::{WorktreeCleanup, WorktreeManager},
};
use tokio::{sync::RwLock, task::JoinHandle};
use tokio_util::io::ReaderStream;
use utils::{
    log_msg::LogMsg,
    msg_store::MsgStore,
    text::{git_branch_id, short_uuid, truncate_to_char_boundary},
};
use uuid::Uuid;

use crate::{command, copy};

#[derive(Clone)]
pub struct LocalContainerService {
    db: DBService,
    child_store: Arc<RwLock<HashMap<Uuid, Arc<RwLock<AsyncGroupChild>>>>>,
    interrupt_senders: Arc<RwLock<HashMap<Uuid, InterruptSender>>>,
    msg_stores: Arc<RwLock<HashMap<Uuid, Arc<MsgStore>>>>,
    config: Arc<RwLock<Config>>,
    git: GitService,
    image_service: ImageService,
    analytics: Option<AnalyticsContext>,
    approvals: Approvals,
    queued_message_service: QueuedMessageService,
    publisher: Result<SharePublisher, RemoteClientNotConfigured>,
    notification_service: NotificationService,
}

impl LocalContainerService {
    #[allow(clippy::too_many_arguments)]
    pub async fn new(
        db: DBService,
        msg_stores: Arc<RwLock<HashMap<Uuid, Arc<MsgStore>>>>,
        config: Arc<RwLock<Config>>,
        git: GitService,
        image_service: ImageService,
        analytics: Option<AnalyticsContext>,
        approvals: Approvals,
        queued_message_service: QueuedMessageService,
        publisher: Result<SharePublisher, RemoteClientNotConfigured>,
    ) -> Self {
        let child_store = Arc::new(RwLock::new(HashMap::new()));
        let interrupt_senders = Arc::new(RwLock::new(HashMap::new()));
        let notification_service = NotificationService::new(config.clone());

        let container = LocalContainerService {
            db,
            child_store,
            interrupt_senders,
            msg_stores,
            config,
            git,
            image_service,
            analytics,
            approvals,
            queued_message_service,
            publisher,
            notification_service,
        };

        container.spawn_worktree_cleanup().await;

        container
    }

    pub async fn get_child_from_store(&self, id: &Uuid) -> Option<Arc<RwLock<AsyncGroupChild>>> {
        let map = self.child_store.read().await;
        map.get(id).cloned()
    }

    pub async fn add_child_to_store(&self, id: Uuid, exec: AsyncGroupChild) {
        let mut map = self.child_store.write().await;
        map.insert(id, Arc::new(RwLock::new(exec)));
    }

    pub async fn remove_child_from_store(&self, id: &Uuid) {
        let mut map = self.child_store.write().await;
        map.remove(id);
    }

    async fn add_interrupt_sender(&self, id: Uuid, sender: InterruptSender) {
        let mut map = self.interrupt_senders.write().await;
        map.insert(id, sender);
    }

    async fn take_interrupt_sender(&self, id: &Uuid) -> Option<InterruptSender> {
        let mut map = self.interrupt_senders.write().await;
        map.remove(id)
    }

    /// Defensively check for externally deleted worktrees and mark them as deleted in the database
    async fn check_externally_deleted_worktrees(db: &DBService) -> Result<(), DeploymentError> {
        let active_attempts = TaskAttempt::find_by_worktree_deleted(&db.pool).await?;
        tracing::debug!(
            "Checking {} active worktrees for external deletion...",
            active_attempts.len()
        );
        for (attempt_id, worktree_path) in active_attempts {
            // Check if worktree directory exists
            if !std::path::Path::new(&worktree_path).exists() {
                // Worktree was deleted externally, mark as deleted in database
                if let Err(e) = TaskAttempt::mark_worktree_deleted(&db.pool, attempt_id).await {
                    tracing::error!(
                        "Failed to mark externally deleted worktree as deleted for attempt {}: {}",
                        attempt_id,
                        e
                    );
                } else {
                    tracing::info!(
                        "Marked externally deleted worktree as deleted for attempt {} (path: {})",
                        attempt_id,
                        worktree_path
                    );
                }
            }
        }
        Ok(())
    }

    /// Find and delete orphaned worktrees that don't correspond to any task attempts
    async fn cleanup_orphaned_worktrees(&self) {
        // Check if orphan cleanup is disabled via environment variable
        if std::env::var("DISABLE_WORKTREE_ORPHAN_CLEANUP").is_ok() {
            tracing::debug!(
                "Orphan worktree cleanup is disabled via DISABLE_WORKTREE_ORPHAN_CLEANUP environment variable"
            );
            return;
        }
        let worktree_base_dir = WorktreeManager::get_worktree_base_dir();
        if !worktree_base_dir.exists() {
            tracing::debug!(
                "Worktree base directory {} does not exist, skipping orphan cleanup",
                worktree_base_dir.display()
            );
            return;
        }
        let entries = match std::fs::read_dir(&worktree_base_dir) {
            Ok(entries) => entries,
            Err(e) => {
                tracing::error!(
                    "Failed to read worktree base directory {}: {}",
                    worktree_base_dir.display(),
                    e
                );
                return;
            }
        };
        for entry in entries {
            let entry = match entry {
                Ok(entry) => entry,
                Err(e) => {
                    tracing::warn!("Failed to read directory entry: {}", e);
                    continue;
                }
            };
            let path = entry.path();
            // Only process directories
            if !path.is_dir() {
                continue;
            }

            let worktree_path_str = path.to_string_lossy().to_string();
            if let Ok(false) =
                TaskAttempt::container_ref_exists(&self.db().pool, &worktree_path_str).await
            {
                // This is an orphaned worktree - delete it
                tracing::info!("Found orphaned worktree: {}", worktree_path_str);
                if let Err(e) =
                    WorktreeManager::cleanup_worktree(&WorktreeCleanup::new(path, None)).await
                {
                    tracing::error!(
                        "Failed to remove orphaned worktree {}: {}",
                        worktree_path_str,
                        e
                    );
                } else {
                    tracing::info!(
                        "Successfully removed orphaned worktree: {}",
                        worktree_path_str
                    );
                }
            }
        }
    }

    pub async fn cleanup_expired_attempt(
        db: &DBService,
        attempt_id: Uuid,
        worktree_path: PathBuf,
        git_repo_path: PathBuf,
    ) -> Result<(), DeploymentError> {
        WorktreeManager::cleanup_worktree(&WorktreeCleanup::new(
            worktree_path,
            Some(git_repo_path),
        ))
        .await?;
        // Mark worktree as deleted in database after successful cleanup
        TaskAttempt::mark_worktree_deleted(&db.pool, attempt_id).await?;
        tracing::info!("Successfully marked worktree as deleted for attempt {attempt_id}",);
        Ok(())
    }

    pub async fn cleanup_expired_attempts(db: &DBService) -> Result<(), DeploymentError> {
        let expired_attempts = TaskAttempt::find_expired_for_cleanup(&db.pool).await?;
        if expired_attempts.is_empty() {
            tracing::debug!("No expired worktrees found");
            return Ok(());
        }
        tracing::info!(
            "Found {} expired worktrees to clean up",
            expired_attempts.len()
        );
        for (attempt_id, worktree_path, git_repo_path) in expired_attempts {
            Self::cleanup_expired_attempt(
                db,
                attempt_id,
                PathBuf::from(worktree_path),
                PathBuf::from(git_repo_path),
            )
            .await
            .unwrap_or_else(|e| {
                tracing::error!("Failed to clean up expired attempt {attempt_id}: {e}",);
            });
        }
        Ok(())
    }

    pub async fn spawn_worktree_cleanup(&self) {
        let db = self.db.clone();
        let mut cleanup_interval = tokio::time::interval(tokio::time::Duration::from_secs(1800)); // 30 minutes
        self.cleanup_orphaned_worktrees().await;
        tokio::spawn(async move {
            loop {
                cleanup_interval.tick().await;
                tracing::info!("Starting periodic worktree cleanup...");
                Self::check_externally_deleted_worktrees(&db)
                    .await
                    .unwrap_or_else(|e| {
                        tracing::error!("Failed to check externally deleted worktrees: {}", e);
                    });
                Self::cleanup_expired_attempts(&db)
                    .await
                    .unwrap_or_else(|e| {
                        tracing::error!("Failed to clean up expired worktree attempts: {}", e)
                    });
            }
        });
    }

    /// Spawn a background task that polls the child process for completion and
    /// cleans up the execution entry when it exits.
    pub fn spawn_exit_monitor(
        &self,
        exec_id: &Uuid,
        exit_signal: Option<ExecutorExitSignal>,
    ) -> JoinHandle<()> {
        let exec_id = *exec_id;
        let child_store = self.child_store.clone();
        let msg_stores = self.msg_stores.clone();
        let db = self.db.clone();
        let config = self.config.clone();
        let container = self.clone();
        let analytics = self.analytics.clone();
        let publisher = self.publisher.clone();

        let mut process_exit_rx = self.spawn_os_exit_watcher(exec_id);

        tokio::spawn(async move {
            let mut exit_signal_future = exit_signal
                .map(|rx| rx.boxed()) // wait for result
                .unwrap_or_else(|| std::future::pending().boxed()); // no signal, stall forever

            let status_result: std::io::Result<std::process::ExitStatus>;

            // Wait for process to exit, or exit signal from executor
            tokio::select! {
                // Exit signal with result.
                // Some coding agent processes do not automatically exit after processing the user request; instead the executor
                // signals when processing has finished to gracefully kill the process.
                exit_result = &mut exit_signal_future => {
                    // Executor signaled completion: kill group and use the provided result
                    if let Some(child_lock) = child_store.read().await.get(&exec_id).cloned() {
                        let mut child = child_lock.write().await ;
                        if let Err(err) = command::kill_process_group(&mut child).await {
                            tracing::error!("Failed to kill process group after exit signal: {} {}", exec_id, err);
                        }
                    }

                    // Map the exit result to appropriate exit status
                    status_result = match exit_result {
                        Ok(ExecutorExitResult::Success) => Ok(success_exit_status()),
                        Ok(ExecutorExitResult::Failure) => Ok(failure_exit_status()),
                        Err(_) => Ok(success_exit_status()), // Channel closed, assume success
                    };
                }
                // Process exit
                exit_status_result = &mut process_exit_rx => {
                    status_result = exit_status_result.unwrap_or_else(|e| Err(std::io::Error::other(e)));
                }
            }

            let (exit_code, status) = match status_result {
                Ok(exit_status) => {
                    let code = exit_status.code().unwrap_or(-1) as i64;
                    let status = if exit_status.success() {
                        ExecutionProcessStatus::Completed
                    } else {
                        ExecutionProcessStatus::Failed
                    };
                    (Some(code), status)
                }
                Err(_) => (None, ExecutionProcessStatus::Failed),
            };

            if !ExecutionProcess::was_stopped(&db.pool, exec_id).await
                && let Err(e) =
                    ExecutionProcess::update_completion(&db.pool, exec_id, status, exit_code).await
            {
                tracing::error!("Failed to update execution process completion: {}", e);
            }

            if let Ok(ctx) = ExecutionProcess::load_context(&db.pool, exec_id).await {
                // Update executor session summary if available
                if let Err(e) = container.update_executor_session_summary(&exec_id).await {
                    tracing::warn!("Failed to update executor session summary: {}", e);
                }

                let success = matches!(
                    ctx.execution_process.status,
                    ExecutionProcessStatus::Completed
                ) && exit_code == Some(0);

                let cleanup_done = matches!(
                    ctx.execution_process.run_reason,
                    ExecutionProcessRunReason::CleanupScript
                ) && !matches!(
                    ctx.execution_process.status,
                    ExecutionProcessStatus::Running
                );

                if success || cleanup_done {
                    // Commit changes (if any) and get feedback about whether changes were made
                    let changes_committed = match container.try_commit_changes(&ctx).await {
                        Ok(committed) => committed,
                        Err(e) => {
                            tracing::error!("Failed to commit changes after execution: {}", e);
                            // Treat commit failures as if changes were made to be safe
                            true
                        }
                    };

                    let should_start_next = if matches!(
                        ctx.execution_process.run_reason,
                        ExecutionProcessRunReason::CodingAgent
                    ) {
                        changes_committed
                    } else {
                        true
                    };

                    if should_start_next {
                        // If the process exited successfully, start the next action
                        if let Err(e) = container.try_start_next_action(&ctx).await {
                            tracing::error!("Failed to start next action after completion: {}", e);
                        }
                    } else {
                        tracing::info!(
                            "Skipping cleanup script for task attempt {} - no changes made by coding agent",
                            ctx.task_attempt.id
                        );

                        // Manually finalize task since we're bypassing normal execution flow
                        container.finalize_task(publisher.as_ref().ok(), &ctx).await;
                    }
                }

                if container.should_finalize(&ctx) {
                    // Only execute queued messages if the execution succeeded
                    // If it failed or was killed, just clear the queue and finalize
                    let should_execute_queued = !matches!(
                        ctx.execution_process.status,
                        ExecutionProcessStatus::Failed | ExecutionProcessStatus::Killed
                    );

                    if let Some(queued_msg) = container
                        .queued_message_service
                        .take_queued(ctx.task_attempt.id)
                    {
                        if should_execute_queued {
                            tracing::info!(
                                "Found queued message for attempt {}, starting follow-up execution",
                                ctx.task_attempt.id
                            );

                            // Delete the scratch since we're consuming the queued message
                            if let Err(e) = Scratch::delete(
                                &db.pool,
                                ctx.task_attempt.id,
                                &ScratchType::DraftFollowUp,
                            )
                            .await
                            {
                                tracing::warn!(
                                    "Failed to delete scratch after consuming queued message: {}",
                                    e
                                );
                            }

                            // Execute the queued follow-up
                            if let Err(e) = container
                                .start_queued_follow_up(&ctx, &queued_msg.data)
                                .await
                            {
                                tracing::error!("Failed to start queued follow-up: {}", e);
                                // Fall back to finalization if follow-up fails
                                container.finalize_task(publisher.as_ref().ok(), &ctx).await;
                            }
                        } else {
                            // Execution failed or was killed - discard the queued message and finalize
                            tracing::info!(
                                "Discarding queued message for attempt {} due to execution status {:?}",
                                ctx.task_attempt.id,
                                ctx.execution_process.status
                            );
                            container.finalize_task(publisher.as_ref().ok(), &ctx).await;
                        }
                    } else {
                        container.finalize_task(publisher.as_ref().ok(), &ctx).await;
                    }
                }

                // Fire analytics event when CodingAgent execution has finished
                if config.read().await.analytics_enabled
                    && matches!(
                        &ctx.execution_process.run_reason,
                        ExecutionProcessRunReason::CodingAgent
                    )
                    && let Some(analytics) = &analytics
                {
                    analytics.analytics_service.track_event(&analytics.user_id, "task_attempt_finished", Some(json!({
                        "task_id": ctx.task.id.to_string(),
                        "project_id": ctx.task.project_id.to_string(),
                        "attempt_id": ctx.task_attempt.id.to_string(),
                        "execution_success": matches!(ctx.execution_process.status, ExecutionProcessStatus::Completed),
                        "exit_code": ctx.execution_process.exit_code,
                    })));
                }
            }

            // Now that commit/next-action/finalization steps for this process are complete,
            // capture the HEAD OID as the definitive "after" state (best-effort).
            if let Ok(ctx) = ExecutionProcess::load_context(&db.pool, exec_id).await {
                let worktree_dir = container.task_attempt_to_current_dir(&ctx.task_attempt);
                if let Ok(head) = container.git().get_head_info(&worktree_dir)
                    && let Err(e) =
                        ExecutionProcess::update_after_head_commit(&db.pool, exec_id, &head.oid)
                            .await
                {
                    tracing::warn!("Failed to update after_head_commit for {}: {}", exec_id, e);
                }
            }

            // Cleanup msg store
            if let Some(msg_arc) = msg_stores.write().await.remove(&exec_id) {
                msg_arc.push_finished();
                tokio::time::sleep(Duration::from_millis(50)).await; // Wait for the finish message to propogate
                match Arc::try_unwrap(msg_arc) {
                    Ok(inner) => drop(inner),
                    Err(arc) => tracing::error!(
                        "There are still {} strong Arcs to MsgStore for {}",
                        Arc::strong_count(&arc),
                        exec_id
                    ),
                }
            }

            // Cleanup child handle
            child_store.write().await.remove(&exec_id);
        })
    }

    pub fn spawn_os_exit_watcher(
        &self,
        exec_id: Uuid,
    ) -> tokio::sync::oneshot::Receiver<std::io::Result<std::process::ExitStatus>> {
        let (tx, rx) = tokio::sync::oneshot::channel::<std::io::Result<std::process::ExitStatus>>();
        let child_store = self.child_store.clone();
        tokio::spawn(async move {
            loop {
                let child_lock = {
                    let map = child_store.read().await;
                    map.get(&exec_id).cloned()
                };
                if let Some(child_lock) = child_lock {
                    let mut child_handler = child_lock.write().await;
                    match child_handler.try_wait() {
                        Ok(Some(status)) => {
                            let _ = tx.send(Ok(status));
                            break;
                        }
                        Ok(None) => {}
                        Err(e) => {
                            let _ = tx.send(Err(e));
                            break;
                        }
                    }
                } else {
                    let _ = tx.send(Err(io::Error::other(format!(
                        "Child handle missing for {exec_id}"
                    ))));
                    break;
                }
                tokio::time::sleep(Duration::from_millis(250)).await;
            }
        });
        rx
    }

    pub fn dir_name_from_task_attempt(attempt_id: &Uuid, task_title: &str) -> String {
        let task_title_id = git_branch_id(task_title);
        format!("{}-{}", short_uuid(attempt_id), task_title_id)
    }

    async fn track_child_msgs_in_store(&self, id: Uuid, child: &mut AsyncGroupChild) {
        let store = Arc::new(MsgStore::new());

        let out = child.inner().stdout.take().expect("no stdout");
        let err = child.inner().stderr.take().expect("no stderr");

        // Map stdout bytes -> LogMsg::Stdout
        let out = ReaderStream::new(out)
            .map_ok(|chunk| LogMsg::Stdout(String::from_utf8_lossy(&chunk).into_owned()));

        // Map stderr bytes -> LogMsg::Stderr
        let err = ReaderStream::new(err)
            .map_ok(|chunk| LogMsg::Stderr(String::from_utf8_lossy(&chunk).into_owned()));

        // If you have a JSON Patch source, map it to LogMsg::JsonPatch too, then select all three.

        // Merge and forward into the store
        let merged = select(out, err); // Stream<Item = Result<LogMsg, io::Error>>
        store.clone().spawn_forwarder(merged);

        let mut map = self.msg_stores().write().await;
        map.insert(id, store);
    }

    /// Get the project repository path for a task attempt
    async fn get_project_repo_path(
        &self,
        task_attempt: &TaskAttempt,
    ) -> Result<PathBuf, ContainerError> {
        let project_repo_path = task_attempt
            .parent_task(&self.db().pool)
            .await?
            .ok_or(ContainerError::Other(anyhow!("Parent task not found")))?
            .parent_project(&self.db().pool)
            .await?
            .ok_or(ContainerError::Other(anyhow!("Parent project not found")))?
            .git_repo_path;

        Ok(project_repo_path)
    }

    /// Create a diff log stream for merged attempts (never changes) for WebSocket
    fn create_merged_diff_stream(
        &self,
        project_repo_path: &Path,
        merge_commit_id: &str,
        stats_only: bool,
    ) -> Result<DiffStreamHandle, ContainerError> {
        let diffs = self.git().get_diffs(
            DiffTarget::Commit {
                repo_path: project_repo_path,
                commit_sha: merge_commit_id,
            },
            None,
        )?;

        let cum = Arc::new(AtomicUsize::new(0));
        let diffs: Vec<_> = diffs
            .into_iter()
            .map(|mut d| {
                diff_stream::apply_stream_omit_policy(&mut d, &cum, stats_only);
                d
            })
            .collect();

        let stream = futures::stream::iter(diffs.into_iter().map(|diff| {
            let entry_index = GitService::diff_path(&diff);
            let patch =
                ConversationPatch::add_diff(escape_json_pointer_segment(&entry_index), diff);
            Ok::<_, std::io::Error>(LogMsg::JsonPatch(patch))
        }))
        .chain(futures::stream::once(async {
            Ok::<_, std::io::Error>(LogMsg::Finished)
        }))
        .boxed();

        Ok(diff_stream::DiffStreamHandle::new(stream, None))
    }

    /// Create a live diff log stream for ongoing attempts for WebSocket
    /// Returns a stream that owns the filesystem watcher - when dropped, watcher is cleaned up
    async fn create_live_diff_stream(
        &self,
        worktree_path: &Path,
        base_commit: &Commit,
        stats_only: bool,
    ) -> Result<DiffStreamHandle, ContainerError> {
        diff_stream::create(
            self.git().clone(),
            worktree_path.to_path_buf(),
            base_commit.clone(),
            stats_only,
        )
        .await
        .map_err(|e| ContainerError::Other(anyhow!("{e}")))
    }

    /// Extract the last assistant message from the MsgStore history
    fn extract_last_assistant_message(&self, exec_id: &Uuid) -> Option<String> {
        // Get the MsgStore for this execution
        let msg_stores = self.msg_stores.try_read().ok()?;
        let msg_store = msg_stores.get(exec_id)?;

        // Get the history and scan in reverse for the last assistant message
        let history = msg_store.get_history();

        for msg in history.iter().rev() {
            if let LogMsg::JsonPatch(patch) = msg {
                // Try to extract a NormalizedEntry from the patch
                if let Some((_, entry)) = extract_normalized_entry_from_patch(patch)
                    && matches!(entry.entry_type, NormalizedEntryType::AssistantMessage)
                {
                    let content = entry.content.trim();
                    if !content.is_empty() {
                        const MAX_SUMMARY_LENGTH: usize = 4096;
                        if content.len() > MAX_SUMMARY_LENGTH {
                            let truncated = truncate_to_char_boundary(content, MAX_SUMMARY_LENGTH);
                            return Some(format!("{truncated}..."));
                        }
                        return Some(content.to_string());
                    }
                }
            }
        }

        None
    }

    /// Update the executor session summary with the final assistant message
    async fn update_executor_session_summary(&self, exec_id: &Uuid) -> Result<(), anyhow::Error> {
        // Check if there's an executor session for this execution process
        let session =
            ExecutorSession::find_by_execution_process_id(&self.db.pool, *exec_id).await?;

        if let Some(session) = session {
            // Only update if summary is not already set
            if session.summary.is_none() {
                if let Some(summary) = self.extract_last_assistant_message(exec_id) {
                    ExecutorSession::update_summary(&self.db.pool, *exec_id, &summary).await?;
                } else {
                    tracing::debug!("No assistant message found for execution {}", exec_id);
                }
            }
        }

        Ok(())
    }

    /// Start a follow-up execution from a queued message
    async fn start_queued_follow_up(
        &self,
        ctx: &ExecutionContext,
        queued_data: &DraftFollowUpData,
    ) -> Result<ExecutionProcess, ContainerError> {
        // Get executor profile from the latest CodingAgent process
        let initial_executor_profile_id = ExecutionProcess::latest_executor_profile_for_attempt(
            &self.db.pool,
            ctx.task_attempt.id,
        )
        .await
        .map_err(|e| ContainerError::Other(anyhow!("Failed to get executor profile: {e}")))?;

        let executor_profile_id = ExecutorProfileId {
            executor: initial_executor_profile_id.executor,
            variant: queued_data.variant.clone(),
        };

        // Get latest session ID for session continuity
        let latest_session_id = ExecutionProcess::find_latest_session_id_by_task_attempt(
            &self.db.pool,
            ctx.task_attempt.id,
        )
        .await?;

        // Get project for cleanup script
        let project = Project::find_by_id(&self.db.pool, ctx.task.project_id)
            .await?
            .ok_or_else(|| ContainerError::Other(anyhow!("Project not found")))?;

        let cleanup_action = self.cleanup_action(project.cleanup_script);

        let action_type = if let Some(session_id) = latest_session_id {
            ExecutorActionType::CodingAgentFollowUpRequest(CodingAgentFollowUpRequest {
                prompt: queued_data.message.clone(),
                session_id,
                executor_profile_id: executor_profile_id.clone(),
            })
        } else {
            ExecutorActionType::CodingAgentInitialRequest(CodingAgentInitialRequest {
                prompt: queued_data.message.clone(),
                executor_profile_id: executor_profile_id.clone(),
            })
        };

        let action = ExecutorAction::new(action_type, cleanup_action);

        self.start_execution(
            &ctx.task_attempt,
            &action,
            &ExecutionProcessRunReason::CodingAgent,
        )
        .await
    }
}

fn failure_exit_status() -> std::process::ExitStatus {
    #[cfg(unix)]
    {
        use std::os::unix::process::ExitStatusExt;
        ExitStatusExt::from_raw(256) // Exit code 1 (shifted by 8 bits)
    }
    #[cfg(windows)]
    {
        use std::os::windows::process::ExitStatusExt;
        ExitStatusExt::from_raw(1)
    }
}

#[async_trait]
impl ContainerService for LocalContainerService {
    fn msg_stores(&self) -> &Arc<RwLock<HashMap<Uuid, Arc<MsgStore>>>> {
        &self.msg_stores
    }

    fn db(&self) -> &DBService {
        &self.db
    }

    fn git(&self) -> &GitService {
        &self.git
    }

    fn share_publisher(&self) -> Option<&SharePublisher> {
        self.publisher.as_ref().ok()
    }

    fn notification_service(&self) -> &NotificationService {
        &self.notification_service
    }

    async fn git_branch_prefix(&self) -> String {
        self.config.read().await.git_branch_prefix.clone()
    }

    fn task_attempt_to_current_dir(&self, task_attempt: &TaskAttempt) -> PathBuf {
        PathBuf::from(task_attempt.container_ref.clone().unwrap_or_default())
    }
    /// Create a container
    async fn create(&self, task_attempt: &TaskAttempt) -> Result<ContainerRef, ContainerError> {
        let task = task_attempt
            .parent_task(&self.db.pool)
            .await?
            .ok_or(sqlx::Error::RowNotFound)?;

        let worktree_dir_name =
            LocalContainerService::dir_name_from_task_attempt(&task_attempt.id, &task.title);
        let worktree_path = WorktreeManager::get_worktree_base_dir().join(&worktree_dir_name);

        let project = task
            .parent_project(&self.db.pool)
            .await?
            .ok_or(sqlx::Error::RowNotFound)?;

        WorktreeManager::create_worktree(
            &project.git_repo_path,
            &task_attempt.branch,
            &worktree_path,
            &task_attempt.target_branch,
            true, // create new branch
        )
        .await?;

        // Copy files specified in the project's copy_files field
        if let Some(copy_files) = &project.copy_files
            && !copy_files.trim().is_empty()
        {
            self.copy_project_files(&project.git_repo_path, &worktree_path, copy_files)
                .await
                .unwrap_or_else(|e| {
                    tracing::warn!("Failed to copy project files: {}", e);
                });
        }

        // Copy task images from cache to worktree
        if let Err(e) = self
            .image_service
            .copy_images_by_task_to_worktree(&worktree_path, task.id)
            .await
        {
            tracing::warn!("Failed to copy task images to worktree: {}", e);
        }

        // Update both container_ref and branch in the database
        TaskAttempt::update_container_ref(
            &self.db.pool,
            task_attempt.id,
            &worktree_path.to_string_lossy(),
        )
        .await?;

        Ok(worktree_path.to_string_lossy().to_string())
    }

    async fn delete_inner(&self, task_attempt: &TaskAttempt) -> Result<(), ContainerError> {
        // cleanup the container, here that means deleting the worktree
        let task = task_attempt
            .parent_task(&self.db.pool)
            .await?
            .ok_or(sqlx::Error::RowNotFound)?;
        let git_repo_path = match Project::find_by_id(&self.db.pool, task.project_id).await {
            Ok(Some(project)) => Some(project.git_repo_path.clone()),
            Ok(None) => None,
            Err(e) => {
                tracing::error!("Failed to fetch project {}: {}", task.project_id, e);
                None
            }
        };
        WorktreeManager::cleanup_worktree(&WorktreeCleanup::new(
            PathBuf::from(task_attempt.container_ref.clone().unwrap_or_default()),
            git_repo_path,
        ))
        .await
        .unwrap_or_else(|e| {
            tracing::warn!(
                "Failed to clean up worktree for task attempt {}: {}",
                task_attempt.id,
                e
            );
        });
        Ok(())
    }

    async fn ensure_container_exists(
        &self,
        task_attempt: &TaskAttempt,
    ) -> Result<ContainerRef, ContainerError> {
        // Get required context
        let task = task_attempt
            .parent_task(&self.db.pool)
            .await?
            .ok_or(sqlx::Error::RowNotFound)?;

        let project = task
            .parent_project(&self.db.pool)
            .await?
            .ok_or(sqlx::Error::RowNotFound)?;

        let container_ref = task_attempt.container_ref.as_ref().ok_or_else(|| {
            ContainerError::Other(anyhow!("Container ref not found for task attempt"))
        })?;
        let worktree_path = PathBuf::from(container_ref);

        WorktreeManager::ensure_worktree_exists(
            &project.git_repo_path,
            &task_attempt.branch,
            &worktree_path,
        )
        .await?;

        Ok(container_ref.to_string())
    }

    async fn is_container_clean(&self, task_attempt: &TaskAttempt) -> Result<bool, ContainerError> {
        if let Some(container_ref) = &task_attempt.container_ref {
            // If container_ref is set, check if the worktree exists
            let path = PathBuf::from(container_ref);
            if path.exists() {
                self.git().is_worktree_clean(&path).map_err(|e| e.into())
            } else {
                return Ok(true); // No worktree means it's clean
            }
        } else {
            return Ok(true); // No container_ref means no worktree, so it's clean
        }
    }

    async fn start_execution_inner(
        &self,
        task_attempt: &TaskAttempt,
        execution_process: &ExecutionProcess,
        executor_action: &ExecutorAction,
    ) -> Result<(), ContainerError> {
        // Get the worktree path
        let container_ref = task_attempt
            .container_ref
            .as_ref()
            .ok_or(ContainerError::Other(anyhow!(
                "Container ref not found for task attempt"
            )))?;
        let current_dir = PathBuf::from(container_ref);

        let approvals_service: Arc<dyn ExecutorApprovalService> =
            match executor_action.base_executor() {
                Some(BaseCodingAgent::Codex) | Some(BaseCodingAgent::ClaudeCode) => {
                    ExecutorApprovalBridge::new(
                        self.approvals.clone(),
                        self.db.clone(),
                        self.notification_service.clone(),
                        execution_process.id,
                    )
                }
                _ => Arc::new(NoopExecutorApprovalService {}),
            };

        // Build ExecutionEnv with VK_* variables
        let mut env = ExecutionEnv::new();

        // Load task and project context for environment variables
        let task = task_attempt
            .parent_task(&self.db.pool)
            .await?
            .ok_or(ContainerError::Other(anyhow!(
                "Task not found for task attempt"
            )))?;
        let project = task
            .parent_project(&self.db.pool)
            .await?
            .ok_or(ContainerError::Other(anyhow!("Project not found for task")))?;

        env.insert("VK_PROJECT_NAME", &project.name);
        env.insert("VK_PROJECT_ID", project.id.to_string());
        env.insert("VK_TASK_ID", task.id.to_string());
        env.insert("VK_ATTEMPT_ID", task_attempt.id.to_string());
        env.insert("VK_ATTEMPT_BRANCH", &task_attempt.branch);

        // Create the child and stream, add to execution tracker with timeout
        let mut spawned = tokio::time::timeout(
            Duration::from_secs(30),
            executor_action.spawn(&current_dir, approvals_service, &env),
        )
        .await
        .map_err(|_| {
            ContainerError::Other(anyhow!(
                "Timeout: process took more than 30 seconds to start"
            ))
        })??;

        self.track_child_msgs_in_store(execution_process.id, &mut spawned.child)
            .await;

        self.add_child_to_store(execution_process.id, spawned.child)
            .await;

        // Store interrupt sender for graceful shutdown
        if let Some(interrupt_sender) = spawned.interrupt_sender {
            self.add_interrupt_sender(execution_process.id, interrupt_sender)
                .await;
        }

        // Spawn unified exit monitor: watches OS exit and optional executor signal
        let _hn = self.spawn_exit_monitor(&execution_process.id, spawned.exit_signal);

        Ok(())
    }

    async fn stop_execution(
        &self,
        execution_process: &ExecutionProcess,
        status: ExecutionProcessStatus,
    ) -> Result<(), ContainerError> {
        let child = self
            .get_child_from_store(&execution_process.id)
            .await
            .ok_or_else(|| {
                ContainerError::Other(anyhow!("Child process not found for execution"))
            })?;
        let exit_code = if status == ExecutionProcessStatus::Completed {
            Some(0)
        } else {
            None
        };

        ExecutionProcess::update_completion(&self.db.pool, execution_process.id, status, exit_code)
            .await?;

        // Try graceful interrupt first, then force kill
        if let Some(interrupt_sender) = self.take_interrupt_sender(&execution_process.id).await {
            // Send interrupt signal (ignore error if receiver dropped)
            let _ = interrupt_sender.send(());

            // Wait for graceful exit with timeout
            let graceful_exit = {
                let mut child_guard = child.write().await;
                tokio::time::timeout(Duration::from_secs(5), child_guard.wait()).await
            };

            match graceful_exit {
                Ok(Ok(_)) => {
                    tracing::debug!(
                        "Process {} exited gracefully after interrupt",
                        execution_process.id
                    );
                }
                Ok(Err(e)) => {
                    tracing::info!("Error waiting for process {}: {}", execution_process.id, e);
                }
                Err(_) => {
                    tracing::debug!(
                        "Graceful shutdown timed out for process {}, force killing",
                        execution_process.id
                    );
                }
            }
        }

        // Kill the child process and remove from the store
        {
            let mut child_guard = child.write().await;
            if let Err(e) = command::kill_process_group(&mut child_guard).await {
                tracing::error!(
                    "Failed to stop execution process {}: {}",
                    execution_process.id,
                    e
                );
                return Err(e);
            }
        }
        self.remove_child_from_store(&execution_process.id).await;

        // Mark the process finished in the MsgStore
        if let Some(msg) = self.msg_stores.write().await.remove(&execution_process.id) {
            msg.push_finished();
        }

        // Update task status to InReview when execution is stopped
        if let Ok(ctx) = ExecutionProcess::load_context(&self.db.pool, execution_process.id).await
            && !matches!(
                ctx.execution_process.run_reason,
                ExecutionProcessRunReason::DevServer
            )
        {
            match Task::update_status(&self.db.pool, ctx.task.id, TaskStatus::InReview).await {
                Ok(_) => {
                    if let Some(publisher) = self.share_publisher()
                        && let Err(err) = publisher.update_shared_task_by_id(ctx.task.id).await
                    {
                        tracing::warn!(
                            ?err,
                            "Failed to propagate shared task update for {}",
                            ctx.task.id
                        );
                    }
                }
                Err(e) => {
                    tracing::error!("Failed to update task status to InReview: {e}");
                }
            }
        }

        tracing::debug!(
            "Execution process {} stopped successfully",
            execution_process.id
        );

        // Record after-head commit OID (best-effort)
        if let Ok(ctx) = ExecutionProcess::load_context(&self.db.pool, execution_process.id).await {
            let worktree = self.task_attempt_to_current_dir(&ctx.task_attempt);
            if let Ok(head) = self.git().get_head_info(&worktree) {
                let _ = ExecutionProcess::update_after_head_commit(
                    &self.db.pool,
                    execution_process.id,
                    &head.oid,
                )
                .await;
            }
        }

        Ok(())
    }

    async fn stream_diff(
        &self,
        task_attempt: &TaskAttempt,
        stats_only: bool,
    ) -> Result<futures::stream::BoxStream<'static, Result<LogMsg, std::io::Error>>, ContainerError>
    {
        let project_repo_path = self.get_project_repo_path(task_attempt).await?;
        let latest_merge =
            Merge::find_latest_by_task_attempt_id(&self.db.pool, task_attempt.id).await?;

        let is_ahead = if let Ok((ahead, _)) = self.git().get_branch_status(
            &project_repo_path,
            &task_attempt.branch,
            &task_attempt.target_branch,
        ) {
            ahead > 0
        } else {
            false
        };

        if let Some(merge) = &latest_merge
            && let Some(commit) = merge.merge_commit()
            && self.is_container_clean(task_attempt).await?
            && !is_ahead
        {
            let wrapper =
                self.create_merged_diff_stream(&project_repo_path, &commit, stats_only)?;
            return Ok(Box::pin(wrapper));
        }

        let container_ref = self.ensure_container_exists(task_attempt).await?;
        let worktree_path = PathBuf::from(container_ref);
        let base_commit = self.git().get_base_commit(
            &project_repo_path,
            &task_attempt.branch,
            &task_attempt.target_branch,
        )?;

        let wrapper = self
            .create_live_diff_stream(&worktree_path, &base_commit, stats_only)
            .await?;
        Ok(Box::pin(wrapper))
    }

    async fn try_commit_changes(&self, ctx: &ExecutionContext) -> Result<bool, ContainerError> {
        if !matches!(
            ctx.execution_process.run_reason,
            ExecutionProcessRunReason::CodingAgent | ExecutionProcessRunReason::CleanupScript,
        ) {
            return Ok(false);
        }

        let message = match ctx.execution_process.run_reason {
            ExecutionProcessRunReason::CodingAgent => {
                // Try to retrieve the task summary from the executor session
                // otherwise fallback to default message
                match ExecutorSession::find_by_execution_process_id(
                    &self.db().pool,
                    ctx.execution_process.id,
                )
                .await
                {
                    Ok(Some(session)) if session.summary.is_some() => session.summary.unwrap(),
                    Ok(_) => {
                        tracing::debug!(
                            "No summary found for execution process {}, using default message",
                            ctx.execution_process.id
                        );
                        format!(
                            "Commit changes from coding agent for task attempt {}",
                            ctx.task_attempt.id
                        )
                    }
                    Err(e) => {
                        tracing::debug!(
                            "Failed to retrieve summary for execution process {}: {}",
                            ctx.execution_process.id,
                            e
                        );
                        format!(
                            "Commit changes from coding agent for task attempt {}",
                            ctx.task_attempt.id
                        )
                    }
                }
            }
            ExecutionProcessRunReason::CleanupScript => {
                format!(
                    "Cleanup script changes for task attempt {}",
                    ctx.task_attempt.id
                )
            }
            _ => Err(ContainerError::Other(anyhow::anyhow!(
                "Invalid run reason for commit"
            )))?,
        };

        let container_ref = ctx.task_attempt.container_ref.as_ref().ok_or_else(|| {
            ContainerError::Other(anyhow::anyhow!("Container reference not found"))
        })?;

        tracing::debug!(
            "Committing changes for task attempt {} at path {:?}: '{}'",
            ctx.task_attempt.id,
            &container_ref,
            message
        );

        let changes_committed = self.git().commit(Path::new(container_ref), &message)?;
        Ok(changes_committed)
    }

    /// Copy files from the original project directory to the worktree
    async fn copy_project_files(
        &self,
        source_dir: &Path,
        target_dir: &Path,
        copy_files: &str,
    ) -> Result<(), ContainerError> {
        let source_dir = source_dir.to_path_buf();
        let target_dir = target_dir.to_path_buf();
        let copy_files = copy_files.to_string();

        tokio::time::timeout(
            std::time::Duration::from_secs(30),
            tokio::task::spawn_blocking(move || {
                copy::copy_project_files_impl(&source_dir, &target_dir, &copy_files)
            }),
        )
        .await
        .map_err(|_| ContainerError::Other(anyhow!("Copy project files timed out after 30s")))?
        .map_err(|e| ContainerError::Other(anyhow!("Copy files task failed: {e}")))?
    }

    async fn kill_all_running_processes(&self) -> Result<(), ContainerError> {
        tracing::info!("Killing all running processes");
        let running_processes = ExecutionProcess::find_running(&self.db.pool).await?;

        for process in running_processes {
            if let Err(error) = self
                .stop_execution(&process, ExecutionProcessStatus::Killed)
                .await
            {
                tracing::error!(
                    "Failed to cleanly kill running execution process {:?}: {:?}",
                    process,
                    error
                );
            }
        }

        Ok(())
    }
}
fn success_exit_status() -> std::process::ExitStatus {
    #[cfg(unix)]
    {
        use std::os::unix::process::ExitStatusExt;
        ExitStatusExt::from_raw(0)
    }
    #[cfg(windows)]
    {
        use std::os::windows::process::ExitStatusExt;
        ExitStatusExt::from_raw(0)
    }
}