/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import type { Task as SDKTask } from '@a2a-js/sdk';
import type {
  TaskStore,
  AgentExecutor,
  AgentExecutionEvent,
  RequestContext,
  ExecutionEventBus,
} from '@a2a-js/sdk/server';
import {
  GeminiEventType,
  SimpleExtensionLoader,
  type ToolCallRequestInfo,
  type Config,
  checkPathTrust,
  isHeadlessMode,
  resolveToRealPath,
} from '@google/gemini-cli-core';
import { v4 as uuidv4 } from 'uuid';

import { logger } from '../utils/logger.js';
import {
  CoderAgentEvent,
  getPersistedState,
  setPersistedState,
  type StateChange,
  type AgentSettings,
  type PersistedStateMetadata,
  getContextIdFromMetadata,
  getAgentSettingsFromMetadata,
} from '../types.js';
import {
  loadConfig,
  setTargetDir,
  envStorage,
  cwdSymbol,
  loadEnvironment,
  type TaskEnv,
} from '../config/config.js';
import { loadSettings } from '../config/settings.js';
import { loadExtensions } from '../config/extension.js';
import { Task } from './task.js';
import { requestStorage } from '../http/requestStorage.js';
import { pushTaskStateFailed } from '../utils/executor_utils.js';

function validateWorkspacePath(workspacePath?: string): string {
  const trimmed = workspacePath?.trim();
  if (!trimmed) {
    return process.env['CODER_AGENT_WORKSPACE_PATH'] ?? process.cwd();
  }
  return resolveToRealPath(trimmed);
}

/**
 * Provides a wrapper for Task. Passes data from Task to SDKTask.
 * The idea is to use this class inside CoderAgentExecutor to replace Task.
 */
class TaskWrapper {
  task: Task;
  agentSettings: AgentSettings;

  constructor(task: Task, agentSettings: AgentSettings) {
    this.task = task;
    this.agentSettings = agentSettings;
  }

  get id() {
    return this.task.id;
  }

  toSDKTask(): SDKTask {
    const persistedState: PersistedStateMetadata = {
      _agentSettings: this.agentSettings,
      _taskState: this.task.taskState,
    };

    const sdkTask: SDKTask = {
      id: this.task.id,
      contextId: this.task.contextId,
      kind: 'task',
      status: {
        state: this.task.taskState,
        timestamp: new Date().toISOString(),
      },
      metadata: setPersistedState({}, persistedState),
      history: [],
      artifacts: [],
    };
    sdkTask.metadata!['_contextId'] = this.task.contextId;
    return sdkTask;
  }
}

/**
 * CoderAgentExecutor implements the agent's core logic for code generation.
 */
export class CoderAgentExecutor implements AgentExecutor {
  private tasks: Map<string, TaskWrapper> = new Map();
  // Track tasks with an active execution loop.
  private executingTasks = new Set<string>();
  private activeAbortControllers = new Map<string, Set<AbortController>>();
  // Track tasks currently initializing to prevent race conditions.
  private initializingTasks = new Set<string>();
  private initializationPromises = new Map<string, Promise<TaskWrapper>>();
  // Track explicitly canceled task IDs to handle cancellation during initialization.
  private explicitlyCanceledTasks = new Set<string>();

  constructor(private taskStore?: TaskStore) {}

  private async getConfigWithEnv(
    agentSettings: AgentSettings,
    taskId: string,
    isTrusted: boolean,
    workspaceRoot: string,
  ): Promise<Config> {
    const settings = loadSettings(workspaceRoot, isTrusted);
    const extensions = loadExtensions(workspaceRoot, isTrusted);
    return loadConfig(
      settings,
      new SimpleExtensionLoader(extensions),
      taskId,
      isTrusted,
      workspaceRoot,
    );
  }

  private async runInIsolatedEnv<T>(
    agentSettings: AgentSettings,
    fn: (isTrusted: boolean, workspaceRoot: string) => Promise<T>,
  ): Promise<T> {
    const workspaceRoot = await setTargetDir(agentSettings);
    const initialSettings = loadSettings(workspaceRoot, false);
    const { isTrusted } = checkPathTrust({
      path: workspaceRoot,
      isFolderTrustEnabled: initialSettings.folderTrust ?? true,
      isHeadless: isHeadlessMode(),
    });

    const envVars: TaskEnv = { ...process.env };
    envVars[cwdSymbol] = workspaceRoot;

    return envStorage.run(envVars, async () => {
      const loadedEnv = await loadEnvironment(
        isTrusted ?? false,
        workspaceRoot,
      );
      Object.assign(envVars, loadedEnv);
      return fn(isTrusted ?? false, workspaceRoot);
    });
  }

  private cleanupAndEvictTask(taskId: string) {
    const wrapper = this.tasks.get(taskId);
    if (wrapper) {
      wrapper.task.dispose();
      this.tasks.delete(taskId);
    }
  }

  /**
   * Reconstructs TaskWrapper from SDKTask.
   */
  async reconstruct(
    sdkTask: SDKTask,
    eventBus?: ExecutionEventBus,
  ): Promise<TaskWrapper> {
    const metadata = sdkTask.metadata || {};
    const persistedState = getPersistedState(metadata);

    if (!persistedState) {
      throw new Error(
        `Cannot reconstruct task ${sdkTask.id}: missing persisted state in metadata.`,
      );
    }

    let agentSettings: AgentSettings;
    try {
      agentSettings = {
        ...(persistedState._agentSettings ?? {}),
        workspacePath: validateWorkspacePath(
          persistedState._agentSettings?.workspacePath,
        ),
        isTrusted: false,
      };
    } catch (error) {
      logger.error(
        `[CoderAgentExecutor] Invalid workspace path in persisted state for task ${sdkTask.id}:`,
        error,
      );
      if (eventBus) {
        void pushTaskStateFailed(
          error,
          eventBus,
          sdkTask.id,
          sdkTask.contextId,
        );
      }
      throw error; // Re-throw to be caught by caller
    }

    return this.runInIsolatedEnv(
      agentSettings,
      async (isTrusted, workspaceRoot) => {
        const config = await this.getConfigWithEnv(
          agentSettings,
          sdkTask.id,
          isTrusted,
          workspaceRoot,
        );
        const contextId: string =
          getContextIdFromMetadata(metadata) || sdkTask.contextId;
        const runtimeTask = await Task.create(
          sdkTask.id,
          contextId,
          config,
          eventBus,
          agentSettings.autoExecute,
        );
        runtimeTask.taskState = persistedState._taskState;
        await runtimeTask.geminiClient.initialize();

        const wrapper = new TaskWrapper(runtimeTask, agentSettings);
        this.tasks.set(sdkTask.id, wrapper);
        logger.info(`Task ${sdkTask.id} reconstructed from store.`);
        return wrapper;
      },
    );
  }

  async createTask(
    taskId: string,
    contextId: string,
    agentSettingsInput?: AgentSettings,
    eventBus?: ExecutionEventBus,
  ): Promise<TaskWrapper> {
    const agentSettings: AgentSettings = agentSettingsInput || {
      kind: CoderAgentEvent.StateAgentSettingsEvent,
      workspacePath: process.cwd(),
    };
    return this.runInIsolatedEnv(
      agentSettings,
      async (isTrusted, workspaceRoot) => {
        const config = await this.getConfigWithEnv(
          agentSettings,
          taskId,
          isTrusted,
          workspaceRoot,
        );
        const runtimeTask = await Task.create(
          taskId,
          contextId,
          config,
          eventBus,
          agentSettings.autoExecute,
        );
        await runtimeTask.geminiClient.initialize();

        const wrapper = new TaskWrapper(runtimeTask, agentSettings);
        this.tasks.set(taskId, wrapper);
        logger.info(`New task ${taskId} created.`);
        return wrapper;
      },
    );
  }

  getTask(taskId: string): TaskWrapper | undefined {
    return this.tasks.get(taskId);
  }

  getAllTasks(): TaskWrapper[] {
    return Array.from(this.tasks.values());
  }

  cancelTask = async (
    taskId: string,
    eventBus: ExecutionEventBus,
  ): Promise<void> => {
    logger.info(
      `[CoderAgentExecutor] Received cancel request for task ${taskId}`,
    );

    const abortControllers = this.activeAbortControllers.get(taskId);
    if (abortControllers && abortControllers.size > 0) {
      this.explicitlyCanceledTasks.add(taskId);
      logger.info(
        `[CoderAgentExecutor] Aborting ${abortControllers.size} active execution loop(s) for task ${taskId}.`,
      );
      // Abort first to ensure loops are stopped.
      for (const controller of Array.from(abortControllers)) {
        controller.abort();
      }

      // Then, attempt to update state and persist.
      const wrapper = this.tasks.get(taskId);
      if (wrapper) {
        const { task } = wrapper;
        task.cancelPendingTools('Task canceled by user request.');
        task.setTaskStateAndPublishUpdate(
          'canceled',
          { kind: CoderAgentEvent.StateChangeEvent },
          'Task canceled by user request.',
          undefined,
          true,
        );
        try {
          await this.taskStore?.save(wrapper.toSDKTask());
          logger.info(
            `[CoderAgentExecutor] Task ${taskId} state CANCELED saved during active abort.`,
          );
        } catch (saveError) {
          logger.error(
            `[CoderAgentExecutor] Failed to save task ${taskId} state during active abort:`,
            saveError,
          );
        }
        this.cleanupAndEvictTask(taskId);
      }
      return;
    }

    // If there is no active execution loop, the task is idle.
    // We can clean it up directly.
    logger.info(
      `[CoderAgentExecutor] No active execution for task ${taskId}. Cleaning up directly.`,
    );
    const wrapper = this.tasks.get(taskId);

    if (!wrapper) {
      logger.warn(
        `[CoderAgentExecutor] Task ${taskId} not found for cancellation.`,
      );
      eventBus.publish({
        kind: 'status-update',
        taskId,
        contextId: uuidv4(),
        status: {
          state: 'failed',
          message: {
            kind: 'message',
            role: 'agent',
            parts: [{ kind: 'text', text: `Task ${taskId} not found.` }],
            messageId: uuidv4(),
            taskId,
          },
        },
        final: true,
      });
      return;
    }

    const { task } = wrapper;

    if (task.taskState === 'canceled' || task.taskState === 'failed') {
      logger.info(
        `[CoderAgentExecutor] Task ${taskId} is already in a final state: ${task.taskState}. No action needed for cancellation.`,
      );
      eventBus.publish({
        kind: 'status-update',
        taskId,
        contextId: task.contextId,
        status: {
          state: task.taskState,
          message: {
            kind: 'message',
            role: 'agent',
            parts: [
              {
                kind: 'text',
                text: `Task ${taskId} is already ${task.taskState}.`,
              },
            ],
            messageId: uuidv4(),
            taskId,
          },
        },
        final: true,
      });
      return;
    }

    try {
      logger.info(
        `[CoderAgentExecutor] Initiating cancellation for task ${taskId}.`,
      );
      task.cancelPendingTools('Task canceled by user request.');

      const stateChange: StateChange = {
        kind: CoderAgentEvent.StateChangeEvent,
      };
      task.setTaskStateAndPublishUpdate(
        'canceled',
        stateChange,
        'Task canceled by user request.',
        undefined,
        true,
      );
      logger.info(
        `[CoderAgentExecutor] Task ${taskId} cancellation processed. Saving state.`,
      );
      await this.taskStore?.save(wrapper.toSDKTask());
      logger.info(`[CoderAgentExecutor] Task ${taskId} state CANCELED saved.`);

      // Cleanup listener subscriptions to avoid memory leaks.
      this.cleanupAndEvictTask(taskId);
    } catch (error) {
      const errorMessage =
        error instanceof Error ? error.message : 'Unknown error';
      logger.error(
        `[CoderAgentExecutor] Error during task cancellation for ${taskId}: ${errorMessage}`,
        error,
      );
      eventBus.publish({
        kind: 'status-update',
        taskId,
        contextId: task.contextId,
        status: {
          state: 'failed',
          message: {
            kind: 'message',
            role: 'agent',
            parts: [
              {
                kind: 'text',
                text: `Failed to process cancellation for task ${taskId}: ${errorMessage}`,
              },
            ],
            messageId: uuidv4(),
            taskId,
          },
        },
        final: true,
      });
    }
  };

  async execute(
    requestContext: RequestContext,
    eventBus: ExecutionEventBus,
  ): Promise<void> {
    const userMessage = requestContext.userMessage;
    const sdkTask = requestContext.task;

    const taskId = sdkTask?.id || userMessage.taskId || uuidv4();
    const contextId: string =
      userMessage.contextId ||
      sdkTask?.contextId ||
      getContextIdFromMetadata(sdkTask?.metadata) ||
      uuidv4();

    let agentSettings: AgentSettings;
    try {
      const existingWrapper = this.tasks.get(taskId);
      if (existingWrapper) {
        agentSettings = existingWrapper.agentSettings;
      } else if (sdkTask) {
        const persistedState = getPersistedState(sdkTask.metadata || {});
        agentSettings = {
          kind: CoderAgentEvent.StateAgentSettingsEvent,
          ...(persistedState?._agentSettings ?? {}),
          workspacePath: validateWorkspacePath(
            persistedState?._agentSettings?.workspacePath,
          ),
          isTrusted: false,
        };
      } else {
        const rawAgentSettings = getAgentSettingsFromMetadata(
          userMessage.metadata,
        );
        agentSettings = {
          kind: CoderAgentEvent.StateAgentSettingsEvent,
          ...(rawAgentSettings || {}),
          workspacePath: validateWorkspacePath(rawAgentSettings?.workspacePath),
          isTrusted: false,
        };
      }
    } catch (error) {
      logger.error(
        `[CoderAgentExecutor] Invalid workspace path during execution setup for task ${taskId}:`,
        error,
      );
      if (eventBus) {
        void pushTaskStateFailed(error, eventBus, taskId, contextId);
      }
      throw error;
    }

    return this.runInIsolatedEnv(agentSettings, async () => {
      try {
        logger.info(
          `[CoderAgentExecutor] Executing for taskId: ${taskId}, contextId: ${contextId}`,
        );
        logger.info(
          `[CoderAgentExecutor] userMessage: ${JSON.stringify(userMessage)}`,
        );
        eventBus.on('event', (event: AgentExecutionEvent) =>
          logger.info('[EventBus event]: ', event),
        );

        const store = requestStorage.getStore();
        if (!store) {
          logger.error(
            '[CoderAgentExecutor] Could not get request from async local storage. Cancellation on socket close will not be handled for this request.',
          );
        }

        const abortController = new AbortController();
        const abortSignal = abortController.signal;

        if (!this.activeAbortControllers.has(taskId)) {
          this.activeAbortControllers.set(taskId, new Set());
        }
        this.activeAbortControllers.get(taskId)!.add(abortController);

        let proceedToMainLoop = false;
        let wrapper: TaskWrapper | undefined;
        let isPrimaryExecution = false;

        try {
          if (store) {
            const socket = store.req.socket;
            const onSocketEnd = () => {
              logger.info(
                `[CoderAgentExecutor] Socket ended for message ${userMessage.messageId} (task ${taskId}). Aborting execution loop.`,
              );
              if (!abortController.signal.aborted) {
                abortController.abort();
              }
              socket.removeListener('end', onSocketEnd);
            };
            socket.on('end', onSocketEnd);
            socket.once('close', () =>
              socket.removeListener('end', onSocketEnd),
            );
            abortSignal.addEventListener('abort', () =>
              socket.removeListener('end', onSocketEnd),
            );
            logger.info(
              `[CoderAgentExecutor] Socket close handler set up for task ${taskId}.`,
            );
          }

          // Check if the task is currently initializing
          if (this.initializingTasks.has(taskId)) {
            logger.info(
              `[CoderAgentExecutor] Task ${taskId} is currently initializing. Waiting for initialization to complete.`,
            );
            const initPromise = this.initializationPromises.get(taskId);
            if (initPromise) {
              try {
                wrapper = await initPromise;
              } catch {
                logger.error(
                  `[CoderAgentExecutor] Failed to wait for task ${taskId} initialization.`,
                );
                return;
              }
            }
          }

          if (!wrapper) {
            this.initializingTasks.add(taskId);
            const initPromise = (async () => {
              let initializedWrapper: TaskWrapper | undefined;
              initializedWrapper = this.tasks.get(taskId);

              if (initializedWrapper) {
                initializedWrapper.task.eventBus = eventBus;
                logger.info(
                  `[CoderAgentExecutor] Task ${taskId} found in memory cache.`,
                );
              } else if (sdkTask) {
                logger.info(
                  `[CoderAgentExecutor] Task ${taskId} found in TaskStore. Reconstructing...`,
                );
                try {
                  initializedWrapper = await this.reconstruct(
                    sdkTask,
                    eventBus,
                  );
                } catch (e) {
                  logger.error(
                    `[CoderAgentExecutor] Aborting execution due to failed task reconstruction for task ${taskId}:`,
                    e,
                  );
                  throw e;
                }
              } else {
                initializedWrapper = await this.createTask(
                  taskId,
                  contextId,
                  agentSettings,
                  eventBus,
                );
                const newTaskSDK = initializedWrapper.toSDKTask();
                eventBus.publish({
                  ...newTaskSDK,
                  kind: 'task',
                  status: {
                    state: 'submitted',
                    timestamp: new Date().toISOString(),
                  },
                  history: [userMessage],
                });
                try {
                  await this.taskStore?.save(newTaskSDK);
                  logger.info(
                    `[CoderAgentExecutor] New task ${taskId} saved to store.`,
                  );
                } catch (saveError) {
                  logger.error(
                    `[CoderAgentExecutor] Failed to save new task ${taskId} to store:`,
                    saveError,
                  );
                }
              }
              return initializedWrapper;
            })();

            this.initializationPromises.set(taskId, initPromise);

            try {
              wrapper = await initPromise;
            } catch {
              // Error is already handled/logged inside the promise
              return;
            } finally {
              this.initializingTasks.delete(taskId);
              this.initializationPromises.delete(taskId);
            }
          }

          if (!wrapper) {
            logger.error(
              `[CoderAgentExecutor] Task ${taskId} is unexpectedly undefined after load/create.`,
            );
            return;
          }

          const currentTask = wrapper.task;

          if (
            ['canceled', 'failed', 'completed'].includes(currentTask.taskState)
          ) {
            logger.warn(
              `[CoderAgentExecutor] Attempted to execute task ${taskId} which is already in state ${currentTask.taskState}. Ignoring.`,
            );
            return;
          }

          if (abortSignal.aborted) {
            logger.warn(
              `[CoderAgentExecutor] Task ${taskId} was aborted during initialization.`,
            );
            const isExplicitCancel = this.explicitlyCanceledTasks.has(taskId);
            const finalState = isExplicitCancel ? 'canceled' : 'input-required';
            const message = isExplicitCancel
              ? 'Task canceled by user request.'
              : 'Execution aborted by client.';
            currentTask.setTaskStateAndPublishUpdate(
              finalState,
              { kind: CoderAgentEvent.StateChangeEvent },
              message,
              undefined,
              true,
            );
            try {
              await this.taskStore?.save(wrapper.toSDKTask());
            } catch (saveError) {
              logger.error(
                `[CoderAgentExecutor] Failed to save task ${taskId} state:`,
                saveError,
              );
            }
            if (isExplicitCancel) {
              this.cleanupAndEvictTask(taskId);
            }
            return;
          }

          if (this.executingTasks.has(taskId)) {
            logger.info(
              `[CoderAgentExecutor] Task ${taskId} has a pending execution. Processing message and yielding.`,
            );
            currentTask.eventBus = eventBus;
            try {
              for await (const _ of currentTask.acceptUserMessage(
                requestContext,
                abortController.signal,
              )) {
                logger.info(
                  `[CoderAgentExecutor] Processing user message ${userMessage.messageId} in secondary execution loop for task ${taskId}.`,
                );
              }
            } catch (error) {
              if (!abortController.signal.aborted) {
                throw error;
              }
              logger.info(
                `[CoderAgentExecutor] Secondary execution loop for task ${taskId} was aborted.`,
              );
            }
            return;
          }

          isPrimaryExecution = true;

          proceedToMainLoop = true;
        } finally {
          this.explicitlyCanceledTasks.delete(taskId);
          if (!proceedToMainLoop) {
            const controllers = this.activeAbortControllers.get(taskId);
            if (controllers) {
              controllers.delete(abortController);
              if (controllers.size === 0) {
                this.activeAbortControllers.delete(taskId);
              }
            }
          }
        }

        const currentTask = wrapper.task;
        try {
          logger.info(
            `[CoderAgentExecutor] Starting main execution for message ${userMessage.messageId} for task ${taskId}.`,
          );
          this.executingTasks.add(taskId);

          let agentTurnActive = true;
          logger.info(
            `[CoderAgentExecutor] Task ${taskId}: Processing user turn.`,
          );
          let agentEvents = currentTask.acceptUserMessage(
            requestContext,
            abortSignal,
          );

          while (agentTurnActive) {
            if (abortSignal.aborted) {
              logger.info(
                `[CoderAgentExecutor] Task ${taskId} aborted before turn. Exiting loop.`,
              );
              throw new Error('Execution aborted');
            }
            logger.info(
              `[CoderAgentExecutor] Task ${taskId}: Processing agent turn (LLM stream).`,
            );
            const toolCallRequests: ToolCallRequestInfo[] = [];
            for await (const event of agentEvents) {
              if (abortSignal.aborted) {
                logger.warn(
                  `[CoderAgentExecutor] Task ${taskId}: Abort signal received during agent event processing.`,
                );
                throw new Error('Execution aborted');
              }
              if (event.type === GeminiEventType.ToolCallRequest) {
                toolCallRequests.push(event.value);
                continue;
              }
              await currentTask.acceptAgentMessage(event);
            }

            if (abortSignal.aborted) throw new Error('Execution aborted');

            if (toolCallRequests.length > 0) {
              logger.info(
                `[CoderAgentExecutor] Task ${taskId}: Found ${toolCallRequests.length} tool call requests. Scheduling as a batch.`,
              );
              await currentTask.scheduleToolCalls(
                toolCallRequests,
                abortSignal,
              );
            }

            logger.info(
              `[CoderAgentExecutor] Task ${taskId}: Waiting for pending tools if any.`,
            );
            await currentTask.waitForPendingTools();
            logger.info(
              `[CoderAgentExecutor] Task ${taskId}: All pending tools completed or none were pending.`,
            );

            if (abortSignal.aborted) throw new Error('Execution aborted');

            if (currentTask.hasPendingTools) {
              logger.info(
                `[CoderAgentExecutor] Task ${taskId}: There are still ${currentTask.pendingToolsCount} pending tools waiting for approval. Yielding to user.`,
              );
              agentTurnActive = false;
            } else {
              const completedTools = currentTask.getAndClearCompletedTools();

              if (completedTools.length > 0) {
                if (
                  completedTools.every((tool) => tool.status === 'cancelled')
                ) {
                  logger.info(
                    `[CoderAgentExecutor] Task ${taskId}: All tool calls were cancelled. Updating history and ending agent turn.`,
                  );
                  currentTask.addToolResponsesToHistory(completedTools);
                  agentTurnActive = false;
                  const stateChange: StateChange = {
                    kind: CoderAgentEvent.StateChangeEvent,
                  };
                  currentTask.setTaskStateAndPublishUpdate(
                    'input-required',
                    stateChange,
                    undefined,
                    undefined,
                    true,
                  );
                } else {
                  logger.info(
                    `[CoderAgentExecutor] Task ${taskId}: Found ${completedTools.length} completed tool calls. Sending results back to LLM.`,
                  );

                  agentEvents = currentTask.sendCompletedToolsToLlm(
                    completedTools,
                    abortSignal,
                  );
                }
              } else {
                logger.info(
                  `[CoderAgentExecutor] Task ${taskId}: No more tool calls to process. Ending agent turn.`,
                );
                agentTurnActive = false;
              }
            }
          }

          logger.info(
            `[CoderAgentExecutor] Task ${taskId}: Agent turn finished, setting to input-required.`,
          );
          const stateChange: StateChange = {
            kind: CoderAgentEvent.StateChangeEvent,
          };
          currentTask.setTaskStateAndPublishUpdate(
            'input-required',
            stateChange,
            undefined,
            undefined,
            true,
          );
        } catch (error) {
          if (abortSignal.aborted) {
            logger.warn(
              `[CoderAgentExecutor] Task ${taskId} execution aborted.`,
            );
            currentTask.cancelPendingTools('Execution aborted');
            if (
              currentTask.taskState !== 'canceled' &&
              currentTask.taskState !== 'failed'
            ) {
              currentTask.setTaskStateAndPublishUpdate(
                'input-required',
                { kind: CoderAgentEvent.StateChangeEvent },
                'Execution aborted by client.',
                undefined,
                true,
              );
            }
          } else {
            const errorMessage =
              error instanceof Error ? error.message : 'Agent execution error';
            logger.error(
              `[CoderAgentExecutor] Error executing agent for task ${taskId}:`,
              error,
            );
            currentTask.cancelPendingTools(errorMessage);
            if (currentTask.taskState !== 'failed') {
              const stateChange: StateChange = {
                kind: CoderAgentEvent.StateChangeEvent,
              };
              currentTask.setTaskStateAndPublishUpdate(
                'failed',
                stateChange,
                errorMessage,
                undefined,
                true,
              );
            }
          }
        } finally {
          if (isPrimaryExecution) {
            const controllers = this.activeAbortControllers.get(taskId);
            if (controllers) {
              controllers.delete(abortController);
              if (controllers.size === 0) {
                this.activeAbortControllers.delete(taskId);
              }
            }
            this.executingTasks.delete(taskId);
            logger.info(
              `[CoderAgentExecutor] Saving final state for task ${taskId}.`,
            );
            try {
              await this.taskStore?.save(wrapper.toSDKTask());
              logger.info(`[CoderAgentExecutor] Task ${taskId} state saved.`);
            } catch (saveError) {
              logger.error(
                `[CoderAgentExecutor] Failed to save task ${taskId} state in finally block:`,
                saveError,
              );
            }

            if (
              ['canceled', 'failed', 'completed'].includes(
                currentTask.taskState,
              )
            ) {
              this.cleanupAndEvictTask(taskId);
            }
          }
        }
      } catch (error) {
        logger.error(
          `[CoderAgentExecutor] Failed to execute task ${taskId}:`,
          error,
        );
        void pushTaskStateFailed(error, eventBus, taskId, contextId);
        throw error;
      }
    }).catch((error) => {
      logger.error(
        `[CoderAgentExecutor] Failed to initialize isolated environment for task ${taskId}:`,
        error,
      );
      if (eventBus) {
        void pushTaskStateFailed(error, eventBus, taskId, contextId);
      }
      throw error;
    });
  }
}