import { test } from 'node:test';
import assert from 'node:assert/strict';
import { existsSync, mkdtempSync, mkdirSync, rmSync, writeFileSync, utimesSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { Store } from '../src/store/index.js';
import { writeJobSpec, runDir, touchHeartbeat, type JobSpec } from '../src/executor/protocol.js';
import { transcriptDir } from '../src/executor/cc.js';
import {
  cleanupTaskRunArtifacts, sweepRunArtifacts, isRunCleanable, loadCleanupConfig,
  type CleanupConfig,
} from '../src/executor/cleanup.js';
import type { Project, Task } from '../src/model/types.js';

const noopLog = { info: (): void => undefined, error: (): void => undefined };
const DAY_MS = 24 * 60 * 60 * 1000;

/** 隔离 MAESTRO_DATA_DIR（runDir/transcriptDir 调用时读 env），跑回调后清理。 */
function withTmpDataDir(cb: (dataDir: string) => void): void {
  const dir = mkdtempSync(join(tmpdir(), 'maestro-cleanup-'));
  const prev = process.env.MAESTRO_DATA_DIR;
  process.env.MAESTRO_DATA_DIR = dir;
  try {
    cb(dir);
  } finally {
    if (prev === undefined) delete process.env.MAESTRO_DATA_DIR;
    else process.env.MAESTRO_DATA_DIR = prev;
    rmSync(dir, { recursive: true, force: true });
  }
}

/** 建项目 + executor run，落 job.json/outbox/heartbeat 到磁盘；返回 store/ids。 */
function setupRun(): { store: Store; taskId: string; runId: string } {
  const store = new Store(':memory:');
  const p = store.createProject({ name: 'cl', repoPath: '/tmp/cl-' + Math.random(), autonomy: 'auto-easy' });
  const t = store.createTask({ projectId: p.id, title: 'tweak', complexity: 'easy' });
  store.setOperations(t.id, 'x');
  store.transition(t.id, 'queued', { by: 'test' });
  store.transition(t.id, 'executing', { by: 'test' });
  const run = store.startRun(t.id, 'executor', { worktree: '/tmp/wt', branch: 'b' });
  // 落产物
  const job: JobSpec = {
    runId: run.id,
    task: t as Task,
    project: p as Project,
    worktreeDir: '/tmp/wt',
    branch: 'b',
  };
  writeJobSpec(job);
  return { store, taskId: t.id, runId: run.id };
}

/** 把 runDir 的 mtime 拨老 days 天（绕过保留期）。 */
function ageDir(runId: string, days: number): void {
  const when = new Date(Date.now() - days * DAY_MS);
  utimesSync(runDir(runId), when, when);
}

test('isRunCleanable：终态/孤儿可回收，在途不可', () => {
  withTmpDataDir(() => {
    const { store, taskId, runId } = setupRun();
    assert.equal(isRunCleanable(store, runId), false);        // executing → 否
    store.transition(taskId, 'exec_review', { by: 'test' });
    assert.equal(isRunCleanable(store, runId), false);        // exec_review → 否
    store.transition(taskId, 'done', { by: 'test' });
    assert.equal(isRunCleanable(store, runId), true);         // done → 是
    assert.equal(isRunCleanable(store, 'run_does_not_exist'), true); // 孤儿 → 是
  });
});

test('cleanupTaskRunArtifacts：终态任务的 runDir 被即时清，转录保留', () => {
  withTmpDataDir(() => {
    const { store, taskId, runId } = setupRun();
    // 造一份转录
    mkdirSync(transcriptDir(), { recursive: true });
    const tref = join(transcriptDir(), `${runId}.jsonl`);
    writeFileSync(tref, '{}\n');

    store.transition(taskId, 'exec_review', { by: 'test' });
    store.transition(taskId, 'done', { by: 'test' });

    assert.ok(existsSync(runDir(runId)));
    const n = cleanupTaskRunArtifacts(store, taskId, noopLog);
    assert.equal(n, 1);
    assert.equal(existsSync(runDir(runId)), false);   // runDir 清
    assert.ok(existsSync(tref));                       // 转录保留
  });
});

test('cleanupTaskRunArtifacts：heartbeat 新鲜则跳过（不误删活跃 run）', () => {
  withTmpDataDir(() => {
    const { store, taskId, runId } = setupRun();
    touchHeartbeat(runId);   // 新鲜心跳
    store.transition(taskId, 'exec_review', { by: 'test' });
    store.transition(taskId, 'done', { by: 'test' });
    const n = cleanupTaskRunArtifacts(store, taskId, noopLog);
    assert.equal(n, 0);
    assert.ok(existsSync(runDir(runId)));
  });
});

const cfg: CleanupConfig = { runRetentionDays: 1, transcriptRetentionDays: 0 };

test('sweepRunArtifacts：done 任务过保留期 → 清；在途 → 留', () => {
  withTmpDataDir(() => {
    const a = setupRun();
    const store = a.store;
    // 第二个 run（同 store）：保持 executing
    const t2 = store.createTask({ projectId: store.listProjects()[0].id, title: 't2', complexity: 'easy' });
    store.setOperations(t2.id, 'y');
    store.transition(t2.id, 'queued', { by: 'test' });
    store.transition(t2.id, 'executing', { by: 'test' });
    const run2 = store.startRun(t2.id, 'executor', { worktree: '/tmp/wt2', branch: 'b2' });
    writeJobSpec({ runId: run2.id, task: t2 as Task, project: store.listProjects()[0] as Project, worktreeDir: '/tmp/wt2', branch: 'b2' });

    // a → done 且拨老；run2 留在 executing
    store.transition(a.taskId, 'exec_review', { by: 'test' });
    store.transition(a.taskId, 'done', { by: 'test' });
    ageDir(a.runId, 2);
    ageDir(run2.id, 2);   // 即便老，executing 也不该删

    const res = sweepRunArtifacts(store, cfg, noopLog);
    assert.equal(res.runDirs, 1);
    assert.equal(existsSync(runDir(a.runId)), false);   // done → 清
    assert.ok(existsSync(runDir(run2.id)));              // executing → 留
  });
});

test('sweepRunArtifacts：未过保留期不清；孤儿过期清', () => {
  withTmpDataDir(() => {
    const { store, taskId, runId } = setupRun();
    store.transition(taskId, 'cancelled', { by: 'test' });
    // 刚创建（mtime≈now），未过 1d 保留期 → 不清
    let res = sweepRunArtifacts(store, cfg, noopLog);
    assert.equal(res.runDirs, 0);
    assert.ok(existsSync(runDir(runId)));
    // 拨老 → 清
    ageDir(runId, 2);
    res = sweepRunArtifacts(store, cfg, noopLog);
    assert.equal(res.runDirs, 1);
    assert.equal(existsSync(runDir(runId)), false);
  });
});

test('sweepRunArtifacts：转录开关（>0 时清终态过期，活跃永留）', () => {
  withTmpDataDir(() => {
    const { store, taskId, runId } = setupRun();
    mkdirSync(transcriptDir(), { recursive: true });
    const tref = join(transcriptDir(), `${runId}.jsonl`);
    writeFileSync(tref, '{}\n');
    const old = new Date(Date.now() - 5 * DAY_MS);
    utimesSync(tref, old, old);

    // 活跃（executing）：转录永不删，即便过期
    let res = sweepRunArtifacts(store, { runRetentionDays: 1, transcriptRetentionDays: 2 }, noopLog);
    assert.equal(res.transcripts, 0);
    assert.ok(existsSync(tref));

    // 转为终态 → 过期转录被清
    store.transition(taskId, 'cancelled', { by: 'test' });
    res = sweepRunArtifacts(store, { runRetentionDays: 1, transcriptRetentionDays: 2 }, noopLog);
    assert.equal(res.transcripts, 1);
    assert.equal(existsSync(tref), false);
  });
});

test('loadCleanupConfig：env 覆盖与非法回退', () => {
  const base = loadCleanupConfig({} as NodeJS.ProcessEnv);
  assert.equal(base.runRetentionDays, 3);
  assert.equal(base.transcriptRetentionDays, 0);
  const over = loadCleanupConfig({ MAESTRO_RUN_RETENTION_DAYS: '7', MAESTRO_TRANSCRIPT_RETENTION_DAYS: '30' } as unknown as NodeJS.ProcessEnv);
  assert.equal(over.runRetentionDays, 7);
  assert.equal(over.transcriptRetentionDays, 30);
  const bad = loadCleanupConfig({ MAESTRO_RUN_RETENTION_DAYS: 'abc' } as unknown as NodeJS.ProcessEnv);
  assert.equal(bad.runRetentionDays, 3);
});