# All files / src/test harness.ts

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     /**
     * Test Harness for E2E Testing
     *
     * Wires up the full system with mocks for E2E testing.
     * Uses real managers (DispatchManager, CoordinationManager) with
     * MockAgentManager and MockWorktreeManager for isolation.
     */

    import { randomUUID } from 'crypto';
    import { vi } from 'vitest';
    import type { DrizzleDatabase } from '../db/index.js';
    import type { EventBus, DomainEvent } from '../events/types.js';
    import { EventEmitterBus } from '../events/bus.js';
    import type { AgentManager } from '../agent/types.js';
    import { MockAgentManager, type MockAgentScenario } from '../agent/mock-manager.js';
    import type { PendingQuestions, QuestionItem } from '../agent/types.js';
    import type { WorktreeManager, Worktree, WorktreeDiff, MergeResult } from '../git/types.js';
    import type { DispatchManager, PhaseDispatchManager } from '../dispatch/types.js';
    import { DefaultDispatchManager } from '../dispatch/manager.js';
    import { DefaultPhaseDispatchManager } from '../dispatch/phase-manager.js';
    import type { CoordinationManager } from '../coordination/types.js';
    import { DefaultCoordinationManager } from '../coordination/manager.js';
    import type { TaskRepository } from '../db/repositories/task-repository.js';
    import type { MessageRepository } from '../db/repositories/message-repository.js';
    import type { AgentRepository } from '../db/repositories/agent-repository.js';
    import type { InitiativeRepository } from '../db/repositories/initiative-repository.js';
    import type { PhaseRepository } from '../db/repositories/phase-repository.js';
    import type { Initiative, Phase, Task } from '../db/schema.js';
    import { createTestDatabase } from '../db/repositories/drizzle/test-helpers.js';
    import { createRepositories } from '../container.js';
    import {
      seedFixture,
      type InitiativeFixture,
      type SeededFixture,
    } from './fixtures.js';
    import { appRouter, createCallerFactory } from '../trpc/router.js';
    import { createContext, type TRPCContext } from '../trpc/context.js';

    // =============================================================================
    // MockWorktreeManager
    // =============================================================================

    /**
     * Simple in-memory WorktreeManager for testing.
     * Creates fake worktrees without actual git operations.
     */
    export class MockWorktreeManager implements WorktreeManager {
      private worktrees: Map<string, Worktree> = new Map();
      private mergeResults: Map<string, MergeResult> = new Map();

      /**
       * Set a custom merge result for a specific worktree.
       * Used to test conflict scenarios.
       */
      setMergeResult(worktreeId: string, result: MergeResult): void {
        this.mergeResults.set(worktreeId, result);
      }

      async create(id: string, branch: string, baseBranch?: string): Promise<Worktree> {
        const worktree: Worktree = {
          id,
          branch,
          path: `/tmp/test-worktrees/${id}`,
          isMainWorktree: false,
        };
        this.worktrees.set(id, worktree);
        return worktree;
      }

      async remove(id: string): Promise<void> {
        if (!this.worktrees.has(id)) {
          throw new Error(`Worktree not found: ${id}`);
        }
        this.worktrees.delete(id);
        this.mergeResults.delete(id);
      }

      async list(): Promise<Worktree[]> {
        return Array.from(this.worktrees.values());
      }

      async get(id: string): Promise<Worktree | null> {
        return this.worktrees.get(id) ?? null;
      }

      async diff(id: string): Promise<WorktreeDiff> {
        if (!this.worktrees.has(id)) {
          throw new Error(`Worktree not found: ${id}`);
        }
        return {
          files: [],
          summary: 'No changes (mock)',
        };
      }

      async merge(id: string, targetBranch: string): Promise<MergeResult> {
        Iif (!this.worktrees.has(id)) {
          throw new Error(`Worktree not found: ${id}`);
        }

        // Return custom result if set, otherwise success
        const customResult = this.mergeResults.get(id);
        if (customResult) {
          return customResult;
        }

        return {
          success: true,
          message: `Merged ${id} into ${targetBranch} (mock)`,
        };
      }

      /**
       * Clear all worktrees.
       * Useful for test cleanup.
       */
      clear(): void {
        this.worktrees.clear();
        this.mergeResults.clear();
      }
    }

    // =============================================================================
    // CapturingEventBus
    // =============================================================================

    /**
     * EventBus wrapper that captures all emitted events.
     * Extends EventEmitterBus with event capture functionality.
     */
    export class CapturingEventBus extends EventEmitterBus {
      /** All emitted events */
      emittedEvents: DomainEvent[] = [];

      emit<T extends DomainEvent>(event: T): void {
        this.emittedEvents.push(event);
        super.emit(event);
      }

      /**
       * Get events by type.
       */
      getEventsByType(type: string): DomainEvent[] {
        return this.emittedEvents.filter((e) => e.type === type);
      }

      /**
       * Clear captured events.
       */
      clearEvents(): void {
        this.emittedEvents = [];
      }
    }

    // =============================================================================
    // tRPC Caller Type
    // =============================================================================

    /**
     * Create caller factory for the app router.
     */
    const createCaller = createCallerFactory(appRouter);

    /**
     * Type for the tRPC caller.
     */
    export type TRPCCaller = ReturnType<typeof createCaller>;

    // =============================================================================
    // TestHarness Interface
    // =============================================================================

    /**
     * Test harness for E2E testing.
     * Provides access to all system components and helper methods.
     */
    export interface TestHarness {
      // Core components
      /** In-memory SQLite database */
      db: DrizzleDatabase;
      /** Event bus with event capture */
      eventBus: CapturingEventBus;
      /** Mock agent manager */
      agentManager: MockAgentManager;
      /** Alias for agentManager - used in tests for clarity */
      mockAgentManager: MockAgentManager;
      /** Mock worktree manager */
      worktreeManager: MockWorktreeManager;
      /** Real dispatch manager wired to mocks */
      dispatchManager: DispatchManager;
      /** Real phase dispatch manager wired to phaseRepository */
      phaseDispatchManager: PhaseDispatchManager;
      /** Real coordination manager wired to mocks */
      coordinationManager: CoordinationManager;

      // Repositories
      /** Task repository */
      taskRepository: TaskRepository;
      /** Message repository */
      messageRepository: MessageRepository;
      /** Agent repository */
      agentRepository: AgentRepository;
      /** Initiative repository */
      initiativeRepository: InitiativeRepository;
      /** Phase repository */
      phaseRepository: PhaseRepository;

      // tRPC Caller
      /** tRPC caller for direct procedure calls */
      caller: TRPCCaller;

      // Helpers
      /**
       * Seed a fixture into the database.
       */
      seedFixture(fixture: InitiativeFixture): Promise<SeededFixture>;

      /**
       * Set scenario for a specific agent name.
       */
      setAgentScenario(agentName: string, scenario: MockAgentScenario): void;

      /**
       * Convenience: Set agent to complete with done status.
       */
      setAgentDone(agentName: string, result?: string): void;

      /**
       * Convenience: Set agent to ask questions (array form).
       */
      setAgentQuestions(
        agentName: string,
        questions: QuestionItem[]
      ): void;

      /**
       * Convenience: Set agent to ask a single question.
       * Wraps the question in an array internally.
       */
      setAgentQuestion(
        agentName: string,
        questionId: string,
        question: string,
        options?: Array<{ label: string; description?: string }>
      ): void;

      /**
       * Convenience: Set agent to fail with unrecoverable error.
       */
      setAgentError(agentName: string, error: string): void;

      /**
       * Get pending questions for an agent.
       */
      getPendingQuestions(agentId: string): Promise<PendingQuestions | null>;

      /**
       * Get events by type.
       */
      getEventsByType(type: string): DomainEvent[];

      /**
       * Get emitted events by type (alias for getEventsByType).
       */
      getEmittedEvents(type: string): DomainEvent[];

      /**
       * Clear all captured events.
       */
      clearEvents(): void;

      /**
       * Clean up all resources.
       */
      cleanup(): void;

      /**
       * Advance fake timers (wrapper for vi.runAllTimersAsync).
       * Only works when vi.useFakeTimers() is active.
       */
      advanceTimers(): Promise<void>;

      // ==========================================================================
      // Architect Mode Helpers
      // ==========================================================================

      /**
       * Set up scenario where architect completes discussion.
       */
      setArchitectDiscussComplete(
        agentName: string,
        _decisions: unknown[],
        summary: string
      ): void;

      /**
       * Set up scenario where architect needs more questions in discuss mode.
       */
      setArchitectDiscussQuestions(
        agentName: string,
        questions: QuestionItem[]
      ): void;

      /**
       * Set up scenario where architect completes plan.
       */
      setArchitectPlanComplete(
        agentName: string,
        _phases: unknown[]
      ): void;

      /**
       * Set up scenario where architect completes detail.
       */
      setArchitectDetailComplete(
        agentName: string,
        _tasks: unknown[]
      ): void;

      /**
       * Set up scenario where architect needs questions in detail mode.
       */
      setArchitectDetailQuestions(
        agentName: string,
        questions: QuestionItem[]
      ): void;

      // ==========================================================================
      // Initiative/Phase/Plan Convenience Helpers
      // ==========================================================================

      /**
       * Get initiative by ID through tRPC.
       */
      getInitiative(id: string): Promise<Initiative | null>;

      /**
       * Get phases for initiative through tRPC.
       */
      getPhases(initiativeId: string): Promise<Phase[]>;

      /**
       * Create initiative through tRPC.
       */
      createInitiative(name: string): Promise<Initiative>;

      /**
       * Create phases from plan output through tRPC.
       */
      createPhasesFromPlan(
        initiativeId: string,
        phases: Array<{ name: string }>
      ): Promise<Phase[]>;

      /**
       * Create a detail task through tRPC (replaces createPlan).
       */
      createDetailTask(
        phaseId: string,
        name: string,
        description?: string
      ): Promise<Task>;

      /**
       * Get child tasks of a parent task through tRPC.
       */
      getChildTasks(parentTaskId: string): Promise<Task[]>;
    }

    // =============================================================================
    // createTestHarness Factory
    // =============================================================================

    /**
     * Create a fully wired test harness for E2E testing.
     *
     * Wires:
     * - In-memory SQLite database
     * - CapturingEventBus (captures all events)
     * - MockAgentManager (simulates agent behavior)
     * - MockWorktreeManager (fake worktrees)
     * - Real DefaultDispatchManager (with mock agent manager)
     * - Real DefaultCoordinationManager (with mock worktree manager)
     * - All repositories (Drizzle implementations)
     * - tRPC caller with full context
     */
    export function createTestHarness(): TestHarness {
      // Create database
      const db = createTestDatabase();

      // Create event bus with capture
      const eventBus = new CapturingEventBus();

      // Create mock managers
      const agentManager = new MockAgentManager({ eventBus });
      const worktreeManager = new MockWorktreeManager();

      // Create repositories
      const repos = createRepositories(db);
      const { taskRepository, messageRepository, agentRepository, initiativeRepository, phaseRepository } = repos;

      // Create real managers wired to mocks
      const dispatchManager = new DefaultDispatchManager(
        taskRepository,
        messageRepository,
        agentManager,
        eventBus
      );

      const phaseDispatchManager = new DefaultPhaseDispatchManager(
        phaseRepository,
        taskRepository,
        dispatchManager,
        eventBus
      );

      const coordinationManager = new DefaultCoordinationManager(
        worktreeManager,
        taskRepository,
        agentRepository,
        messageRepository,
        eventBus
      );

      // Create tRPC context with all dependencies
      const ctx: TRPCContext = createContext({
        eventBus,
        serverStartedAt: new Date(),
        processCount: 0,
        agentManager,
        taskRepository,
        messageRepository,
        dispatchManager,
        phaseDispatchManager,
        coordinationManager,
        initiativeRepository,
        phaseRepository,
      });

      // Create tRPC caller
      const caller = createCaller(ctx);

      // Build harness
      const harness: TestHarness = {
        // Core components
        db,
        eventBus,
        agentManager,
        mockAgentManager: agentManager, // Alias for clarity in tests
        worktreeManager,
        dispatchManager,
        phaseDispatchManager,
        coordinationManager,

        // Repositories
        taskRepository,
        messageRepository,
        agentRepository,
        initiativeRepository,
        phaseRepository,

        // tRPC Caller
        caller,

        // Helpers
        seedFixture: (fixture: InitiativeFixture) => seedFixture(db, fixture),

        setAgentScenario: (agentName: string, scenario: MockAgentScenario) => {
          agentManager.setScenario(agentName, scenario);
        },

        setAgentDone: (agentName: string, result?: string) => {
          agentManager.setScenario(agentName, { status: 'done', result });
        },

        setAgentQuestions: (
          agentName: string,
          questions: QuestionItem[]
        ) => {
          agentManager.setScenario(agentName, { status: 'questions', questions });
        },

        setAgentQuestion: (
          agentName: string,
          questionId: string,
          question: string,
          options?: Array<{ label: string; description?: string }>
        ) => {
          agentManager.setScenario(agentName, {
            status: 'questions',
            questions: [{ id: questionId, question, options }],
          });
        },

        setAgentError: (agentName: string, error: string) => {
          agentManager.setScenario(agentName, { status: 'error', error });
        },

        getPendingQuestions: (agentId: string) => agentManager.getPendingQuestions(agentId),

        getEventsByType: (type: string) => eventBus.getEventsByType(type),

        getEmittedEvents: (type: string) => eventBus.getEventsByType(type),

        clearEvents: () => eventBus.clearEvents(),

        cleanup: () => {
          agentManager.clear();
          worktreeManager.clear();
          eventBus.clearEvents();
        },

        // Timer helper - requires vi.useFakeTimers() to be active
        advanceTimers: () => vi.runAllTimersAsync(),

        // ========================================================================
        // Architect Mode Helpers
        // ========================================================================

        setArchitectDiscussComplete: (
          agentName: string,
          _decisions: unknown[],
          summary: string
        ) => {
          agentManager.setScenario(agentName, {
            status: 'done',
            result: summary,
            delay: 0,
          });
        },

        setArchitectDiscussQuestions: (
          agentName: string,
          questions: QuestionItem[]
        ) => {
          agentManager.setScenario(agentName, {
            status: 'questions',
            questions,
            delay: 0,
          });
        },

        setArchitectPlanComplete: (
          agentName: string,
          _phases: unknown[]
        ) => {
          agentManager.setScenario(agentName, {
            status: 'done',
            result: 'Plan complete',
            delay: 0,
          });
        },

        setArchitectDetailComplete: (
          agentName: string,
          _tasks: unknown[]
        ) => {
          agentManager.setScenario(agentName, {
            status: 'done',
            result: 'Detail complete',
            delay: 0,
          });
        },

        setArchitectDetailQuestions: (
          agentName: string,
          questions: QuestionItem[]
        ) => {
          agentManager.setScenario(agentName, {
            status: 'questions',
            questions,
            delay: 0,
          });
        },

        // ========================================================================
        // Initiative/Phase/Plan Convenience Helpers
        // ========================================================================

        getInitiative: async (id: string) => {
          try {
            return await caller.getInitiative({ id });
          } catch {
            return null;
          }
        },

        getPhases: (initiativeId: string) => {
          return caller.listPhases({ initiativeId });
        },

        createInitiative: (name: string) => {
          return caller.createInitiative({ name });
        },

        createPhasesFromPlan: (
          initiativeId: string,
          phases: Array<{ name: string }>
        ) => {
          return caller.createPhasesFromPlan({ initiativeId, phases });
        },

        createDetailTask: async (phaseId: string, name: string, description?: string) => {
          return caller.createPhaseTask({
            phaseId,
            name,
            description,
            category: 'detail',
            type: 'auto',
            requiresApproval: true,
          });
        },

        getChildTasks: (parentTaskId: string) => {
          return caller.listTasks({ parentTaskId });
        },
      };

      return harness;
    }