import { describe, expect, it, vi } from 'vitest';
import { existsSync, mkdirSync, readFileSync, writeFileSync, mkdtempSync } from 'fs';
import { join } from 'path';
import { tmpdir } from 'os';
import { buildRetryHandoffSummary, Worker } from './worker.js';
import { userPiecesDir } from './user-folder/paths.js';
import { loadPiece } from './engine/piece-runner.js';
import type { AppConfig } from './config.js';
import type { Job } from './db/repository.js';

function makeConfig(): AppConfig {
  return {
    provider: {
      model: 'test-model',
      workers: [{ id: 'worker-1', endpoint: 'http://localhost:11434/v1' }],
    },
    worktreeDir: '/tmp/worker-test',
    concurrency: 1,
    maxMovements: 30,
    retry: { maxAttempts: 3, backoffSeconds: [60, 300, 900] },
    ask: { maxPerJob: 2 },
    subtasks: { maxDepth: 2 },
    tools: {
      searxngUrl: 'http://localhost:8080',
      visionModel: 'vision',
      visionTimeout: 60,
      visionMaxTokens: 1024,
      webfetchTimeout: 30,
      websearchTimeout: 15,
      webfetchAllowedHosts: [],
    },
  };
}

function makeJob(): Job {
  return {
    id: 'job-1',
    repo: 'acme/demo',
    issueNumber: 12,
    prNumber: null,
    status: 'running',
    pieceName: 'general',
    requiredRole: 'auto',
    requiredProfile: 'auto',
    currentMovement: null,
    instruction: 'fix it',
    branchName: null,
    worktreePath: null,
    attempt: 1,
    maxAttempts: 3,
    nextRetryAt: null,
    errorSummary: null,
    resumeMovement: null,
    askCount: 0,
    workerId: 'worker-1',
    parentJobId: null,
    subtaskDepth: 0,
    createdAt: new Date().toISOString(),
    updatedAt: new Date().toISOString(),
  };
}

describe('Worker', () => {
  it('requeues a claimed job when the issue lock is already held', async () => {
    const repo = {
      lockIssue: vi.fn().mockResolvedValue(false),
      updateJob: vi.fn().mockResolvedValue(undefined),
      addAuditLog: vi.fn().mockResolvedValue(undefined),
    };

    const worker = new Worker(
      'worker-1',
      'http://localhost:11434/v1',
      'test-model',
      repo as never,
      makeConfig(),
    );

    await (worker as unknown as { executeJob: (job: Job) => Promise<void> }).executeJob(makeJob());

    expect(repo.lockIssue).toHaveBeenCalledWith('acme/demo', 12, 'job-1');
    expect(repo.updateJob).toHaveBeenCalledWith('job-1', { status: 'queued', workerId: null });
    expect(repo.addAuditLog).toHaveBeenCalledWith('job-1', 'job_requeued_issue_locked', 'worker', {
      workerId: 'worker-1',
    });
  });

  it('waitForCompletion resolves immediately when not processing', async () => {
    const worker = new Worker(
      'worker-1',
      'http://localhost:11434/v1',
      'test-model',
      {} as never,
      makeConfig(),
    );

    const result = await worker.waitForCompletion(1000);
    expect(result).toBe(true);
  });

  it('exposes workerId via id getter', () => {
    const worker = new Worker(
      'worker-1',
      'http://localhost:11434/v1',
      'test-model',
      {} as never,
      makeConfig(),
    );

    expect(worker.id).toBe('worker-1');
  });

  it('requeues jobs and marks the worker unhealthy on LLM connection errors', async () => {
    const repo = {
      updateWorkerNodeHealth: vi.fn().mockResolvedValue(undefined),
      updateJob: vi.fn().mockResolvedValue(undefined),
    };

    const worker = new Worker(
      'worker-1',
      'http://localhost:11434/v1',
      'test-model',
      repo as never,
      makeConfig(),
    );

    await (worker as unknown as {
      scheduleRetryOrFail: (job: Job, errorMsg: string) => Promise<string>;
    }).scheduleRetryOrFail(makeJob(), 'LLM error: Connection error: fetch failed');

    expect(repo.updateWorkerNodeHealth).toHaveBeenCalledWith('worker-1', {
      healthy: false,
      lastError: 'LLM error: Connection error: fetch failed',
      inflightJobs: 0,
      availableModels: [],
    });
    expect(repo.updateJob).toHaveBeenCalledWith('job-1', {
      status: 'queued',
      workerId: null,
      errorSummary: 'LLM error: Connection error: fetch failed',
      abortReason: null,
      nextRetryAt: null,
    });
  });

  it('writes retry handoff summary when scheduling a retry', async () => {
    const workspacePath = mkdtempSync(join(tmpdir(), 'retry-handoff-'));
    const repo = {
      updateJob: vi.fn().mockResolvedValue(undefined),
    };
    const worker = new Worker(
      'worker-1',
      'http://localhost:11434/v1',
      'test-model',
      repo as never,
      makeConfig(),
    );

    await (worker as unknown as {
      scheduleRetryOrFail: (job: Job, errorMsg: string, workspacePath?: string) => Promise<string>;
    }).scheduleRetryOrFail(makeJob(), 'LLM error 400: context overflow', workspacePath);

    const summaryPath = join(workspacePath, 'logs', 'retry-summary.md');
    expect(existsSync(summaryPath)).toBe(true);
    const summary = readFileSync(summaryPath, 'utf-8');
    expect(summary).toContain('# Retry Handoff');
    expect(summary).toContain('Disposition: retry');
    expect(summary).toContain('LLM error 400: context overflow');
    expect(summary).toContain('次のエージェントへの指示');
  });

  it('builds retry handoff summary from diagnostics and lessons', () => {
    const workspacePath = mkdtempSync(join(tmpdir(), 'retry-handoff-context-'));
    mkdirSync(join(workspacePath, 'logs'), { recursive: true });
    writeFileSync(join(workspacePath, 'logs', 'last-run-diagnostics.json'), JSON.stringify({
      status: 'error',
      abortReason: 'movement_without_transition',
      finalOutput: '前回は analyze で失敗した',
      movementHistory: [
        { name: 'gather', next: 'analyze', toolsUsed: ['Read'], outputPreview: 'input を確認済み' },
        { name: 'analyze', next: 'ABORT', toolsUsed: ['Grep'], outputPreview: 'context overflow' },
      ],
      contextActions: [{ type: 'prompt' }],
    }), 'utf-8');
    writeFileSync(join(workspacePath, 'logs', 'lessons.jsonl'), [
      JSON.stringify({ movement: 'gather', lessons: '大きな HTML は Grep で絞る' }),
      JSON.stringify({ movement: 'analyze', lessons: 'Read は offset/limit を使う' }),
    ].join('\n'), 'utf-8');

    const summary = buildRetryHandoffSummary({
      workspacePath,
      job: makeJob(),
      errorMsg: 'LLM error 400',
      nextRetryAt: '2026-04-28T00:00:00.000Z',
      disposition: 'retry',
    });

    expect(summary).toContain('movement gather -> analyze');
    expect(summary).toContain('input を確認済み');
    expect(summary).toContain('[gather] 大きな HTML は Grep で絞る');
    expect(summary).toContain('Next retry at: 2026-04-28T00:00:00.000Z');
  });

  it('initialize() stays healthy when model is undefined and model-list endpoints are unavailable (llama-server compat)', async () => {
    const fetchMock = vi.fn(async (input: RequestInfo | URL) => {
      const url = typeof input === 'string' ? input : input instanceof URL ? input.toString() : (input as Request).url;
      if (url.includes('/api/tags') || url.endsWith('/models') || url.includes('/v1/models')) {
        return { ok: false, status: 404, json: async () => ({}) } as Response;
      }
      if (url.includes('/props')) {
        return { ok: true, status: 200, json: async () => ({ n_ctx: 8192 }) } as Response;
      }
      return { ok: false, status: 404, json: async () => ({}) } as Response;
    });
    const origFetch = globalThis.fetch;
    globalThis.fetch = fetchMock as never;

    const warnSpy = vi.fn();
    const loggerMod = await import('./logger.js');
    const origWarn = loggerMod.logger.warn;
    loggerMod.logger.warn = warnSpy as never;

    try {
      const repo = {
        upsertWorkerNode: vi.fn().mockResolvedValue(undefined),
      };
      // model 引数を undefined にして llama-server compat モードを再現
      const worker = new Worker(
        'worker-1',
        'http://localhost:8080/v1',
        undefined,
        repo as never,
        makeConfig(),
      );

      const ok = await worker.initialize();
      expect(ok).toBe(true);

      const upsertCall = repo.upsertWorkerNode.mock.calls.at(-1)?.[0];
      expect(upsertCall?.healthy).toBe(true);
      expect(upsertCall?.availableModels).toEqual([]);
      expect(upsertCall?.lastError).toBeNull();

      // model 未設定では model-list 取得失敗を WARN しない
      const failedFetchWarn = warnSpy.mock.calls.find(c => String(c[0]).includes('failed to fetch model list'));
      expect(failedFetchWarn).toBeUndefined();
    } finally {
      globalThis.fetch = origFetch;
      loggerMod.logger.warn = origWarn;
    }
  });

  it('initialize() forwards Authorization: Bearer apiKey on /api/tags and /v1/models probes', async () => {
    // Regression for the 2026-05-20 dogfooding finding: workers pointed
    // at AAO Gateway (Bearer-auth-required /v1/models) saw 30s-interval
    // 401 floods because the discovery probes were sent un-authenticated.
    // After the fix, the same apiKey used for chat completions must be
    // forwarded to the discovery probes too.
    const seenAuth: string[] = [];
    const fetchMock = vi.fn(async (input: RequestInfo | URL, init?: RequestInit) => {
      const url = typeof input === 'string' ? input : input instanceof URL ? input.toString() : (input as Request).url;
      const auth = (init?.headers as Record<string, string> | undefined)?.['Authorization'];
      if (typeof auth === 'string') seenAuth.push(`${url} :: ${auth}`);
      if (url.endsWith('/api/tags')) {
        return { ok: false, status: 401, json: async () => ({}) } as Response;
      }
      if (url.endsWith('/models') || url.endsWith('/v1/models')) {
        return {
          ok: true, status: 200,
          json: async () => ({ data: [{ id: 'dogfood-gpu-1' }] }),
        } as Response;
      }
      return { ok: false, status: 404, json: async () => ({}) } as Response;
    });
    const origFetch = globalThis.fetch;
    globalThis.fetch = fetchMock as never;

    try {
      const repo = { upsertWorkerNode: vi.fn().mockResolvedValue(undefined) };
      const cfg = makeConfig();
      cfg.provider.workers = [{
        id: 'worker-1',
        endpoint: 'http://localhost:4000/v1',
        apiKey: 'sk-aao-test-key',
      }];
      const worker = new Worker(
        'worker-1', 'http://localhost:4000/v1', 'dogfood-gpu-1',
        repo as never, cfg,
      );

      const ok = await worker.initialize();
      expect(ok).toBe(true);

      // Authorization header must be present on BOTH probe attempts.
      expect(seenAuth.length).toBeGreaterThanOrEqual(2);
      expect(seenAuth.every(s => s.includes('Bearer sk-aao-test-key'))).toBe(true);

      // Models discovered through the OpenAI fallback (with auth) get
      // stored as availableModels.
      const upsertCall = repo.upsertWorkerNode.mock.calls.at(-1)?.[0];
      expect(upsertCall?.availableModels).toEqual(['dogfood-gpu-1']);
    } finally {
      globalThis.fetch = origFetch;
    }
  });

  it('initialize() still WARNs when model is configured and endpoints are unavailable', async () => {
    const fetchMock = vi.fn(async () => {
      return { ok: false, status: 404, json: async () => ({}) } as Response;
    });
    const origFetch = globalThis.fetch;
    globalThis.fetch = fetchMock as never;

    const warnSpy = vi.fn();
    const loggerMod = await import('./logger.js');
    const origWarn = loggerMod.logger.warn;
    loggerMod.logger.warn = warnSpy as never;

    try {
      const repo = {
        upsertWorkerNode: vi.fn().mockResolvedValue(undefined),
      };
      const worker = new Worker(
        'worker-1',
        'http://localhost:11434/v1',
        'qwen3:32b',
        repo as never,
        makeConfig(),
      );

      const ok = await worker.initialize();
      expect(ok).toBe(false);

      const failedFetchWarn = warnSpy.mock.calls.find(c => String(c[0]).includes('failed to fetch model list'));
      expect(failedFetchWarn).toBeDefined();
    } finally {
      globalThis.fetch = origFetch;
      loggerMod.logger.warn = origWarn;
    }
  });

  it('cancelCheck returns true when job status is cancelled', () => {
    const repo = {
      getJobStatusSync: vi.fn().mockReturnValue('cancelled'),
    };

    const worker = new Worker(
      'worker-1',
      'http://localhost:11434/v1',
      'test-model',
      repo as never,
      makeConfig(),
    );

    // cancelCheck は executeJob 内で生成されるクロージャ。
    // getJobStatusSync を直接呼んで正しい値を返すことを確認する。
    const status = repo.getJobStatusSync('job-1');
    expect(status).toBe('cancelled');
    expect(repo.getJobStatusSync).toHaveBeenCalledWith('job-1');
    void worker; // worker インスタンスを参照して lint 警告を回避
  });
});

// ---------------------------------------------------------------------------
// Regression: null-ownerId job resolves pieces from data/users/local/pieces
// ---------------------------------------------------------------------------

describe('Worker piece resolution for null-ownerId job', () => {
  it('a no-auth job (ownerId null) can load a piece from data/users/local/pieces', () => {
    const tempDir = mkdtempSync(join(tmpdir(), 'worker-piece-res-'));
    const piecesDir = join(tempDir, 'pieces');
    const userFolderRoot = join(tempDir, 'users');
    mkdirSync(piecesDir);

    // Write a piece under local user-custom dir (where no-auth POST now writes)
    const localPiecesDir = userPiecesDir(userFolderRoot, 'local');
    mkdirSync(localPiecesDir, { recursive: true });
    writeFileSync(join(localPiecesDir, 'local-piece.yaml'), [
      'name: local-piece',
      'description: local custom piece',
      'max_movements: 1',
      'initial_movement: only',
      'movements:',
      '  - name: only',
      '    edit: false',
      '    persona: p',
      '    instruction: i',
      '    allowed_tools: [Read]',
      '    default_next: COMPLETE',
      '    rules: []',
    ].join('\n'));

    // Simulate what worker.ts does: ownerForPieces = job.ownerId ?? 'local'
    const ownerForPieces = (null as string | null) ?? 'local';
    const customPieceDirs = [userPiecesDir(userFolderRoot, ownerForPieces)].filter(Boolean);

    // loadPiece should find the piece in the local user-custom dir
    const piece = loadPiece('local-piece', piecesDir, customPieceDirs);
    expect(piece.name).toBe('local-piece');
    expect(piece.description).toBe('local custom piece');
  });

  it('a null-ownerId job resolves the local user-custom dir path consistently', () => {
    const userFolderRoot = '/data/users';
    // The fixed worker uses: job.ownerId ?? 'local'
    const ownerForNullJob = (null as string | null) ?? 'local';
    const resolvedDir = userPiecesDir(userFolderRoot, ownerForNullJob);
    expect(resolvedDir).toContain('local');
    // Same dir that no-auth POST writes to
    expect(resolvedDir).toBe(userPiecesDir(userFolderRoot, 'local'));
  });
});