import { test } from 'node:test';
import assert from 'node:assert/strict';
import { buildPrompt, buildPlannerPrompt, buildConflictPrompt } from '../src/executor/runner.js';
import { Store } from '../src/store/index.js';
import type { Task, Project } from '../src/model/types.js';

function fakeProject(over: Partial<Project> = {}): Project {
  return { defaultBranch: 'main', agentRules: null, ...over } as Project;
}

function fakeTask(over: Partial<Task> = {}): Task {
  return {
    id: 'tsk_x', title: '改个东西', complexity: 'medium', depth: 1,
    operations: '把 A 改成 B', spec: null, plan: null, deps: [],
    ...over,
  } as Task;
}

const SECTION = '上次失败原因';

test('L1: 无 lastRunError 时三处 prompt 都不含「上次失败原因」段', () => {
  const t = fakeTask();
  assert.ok(!buildPrompt(t).includes(SECTION));
  assert.ok(!buildPlannerPrompt(fakeTask({ complexity: 'medium' }), 'spec').includes(SECTION));
  assert.ok(!buildPlannerPrompt(fakeTask({ complexity: 'hard' }), 'decompose').includes(SECTION));
  assert.ok(!buildConflictPrompt(t, ['a.ts']).includes(SECTION));
});

test('L1: 有 lastRunError 时三处 prompt 注入失败原因', () => {
  const err = 'verify 失败：npm test 退出码 1\nFAIL src/foo.test.ts';
  const t = fakeTask({ lastRunError: err });
  for (const p of [
    buildPrompt(t),
    buildPlannerPrompt(fakeTask({ complexity: 'medium', lastRunError: err }), 'spec'),
    buildPlannerPrompt(fakeTask({ complexity: 'hard', lastRunError: err }), 'decompose'),
    buildConflictPrompt(t, ['a.ts']),
  ]) {
    assert.ok(p.includes(SECTION), '应含失败段标题');
    assert.ok(p.includes('npm test 退出码 1'), '应含具体错误');
  }
});

test('L1: 超长错误被截断到 2000 字符', () => {
  const err = 'X'.repeat(5000);
  const p = buildPrompt(fakeTask({ lastRunError: err }));
  assert.ok(p.includes('已截断'));
  assert.ok(!p.includes('X'.repeat(2100)));
});

test('L2: project.agentRules 注入 executor/planner/conflict/，未设则不注入', () => {
  const t = fakeTask();
  const withRules = fakeProject({ agentRules: '本项目禁止改 schema.sql' });
  assert.ok(buildPrompt(t, withRules).includes('项目规范'));
  assert.ok(buildPrompt(t, withRules).includes('禁止改 schema.sql'));
  assert.ok(buildPlannerPrompt(fakeTask({ complexity: 'hard' }), 'decompose', withRules).includes('禁止改 schema.sql'));
  assert.ok(buildConflictPrompt(t, ['a.ts'], withRules).includes('禁止改 schema.sql'));
  // 未设规范 → 不出现「项目规范」标题
  assert.ok(!buildPrompt(t, fakeProject()).includes('项目规范'));
  assert.ok(!buildPrompt(t).includes('项目规范'));  // 连 project 都没传
});

test('L4: globalRules 注入且排在项目规范之前', () => {
  const t = fakeTask();
  const p = buildPrompt(t, fakeProject({ agentRules: 'PROJ_RULE' }), 'GLOBAL_RULE');
  assert.ok(p.includes('全局执行规范'));
  assert.ok(p.includes('GLOBAL_RULE'));
  assert.ok(p.indexOf('GLOBAL_RULE') < p.indexOf('PROJ_RULE'), '全局规范在项目规范之前');
  // 全局规范在任务内容之前（注入顺序：L4→L2→任务内容）
  assert.ok(p.indexOf('GLOBAL_RULE') < p.indexOf('任务内容'));
});

test('L3: context 注入父任务意图 + 兄弟状态，无 context 不注入', () => {
  const t = fakeTask({
    context: {
      parentPlan: '把登录拆成前后端',
      siblings: [{ title: '前端表单', status: 'done', complexity: 'easy' }],
    },
  });
  const p = buildPrompt(t);
  assert.ok(p.includes('拆解背景'));
  assert.ok(p.includes('把登录拆成前后端'));
  assert.ok(p.includes('前端表单'));
  assert.ok(p.indexOf('拆解背景') < p.indexOf('任务内容'), '背景在任务内容之前');
  assert.ok(!buildPrompt(fakeTask()).includes('拆解背景'));
});

test('taskContextOf 取父 plan + 兄弟概览（排除自身）', () => {
  const s = new Store(':memory:');
  const pj = s.createProject({ name: 'l3', repoPath: '/tmp/l3-' + Math.random() });
  const parent = s.createTask({ projectId: pj.id, title: '大', complexity: 'hard' });
  s.setPlan(parent.id, '拆成 a 和 b');
  const a = s.createTask({ projectId: pj.id, parentId: parent.id, title: 'a', complexity: 'easy' });
  s.createTask({ projectId: pj.id, parentId: parent.id, title: 'b', complexity: 'easy' });
  assert.equal(s.taskContextOf(parent.id), null, '根任务无 parent → null');
  const ctxA = s.taskContextOf(a.id)!;
  assert.equal(ctxA.parentPlan, '拆成 a 和 b');
  assert.deepEqual(ctxA.siblings!.map((x) => x.title), ['b'], '兄弟里不含自身 a');
  s.close();
});

test('lastRunErrorOf 取最近一次失败 run 的错误（任意 kind）', () => {
  const s = new Store(':memory:');
  const p = s.createProject({ name: 'l1', repoPath: '/tmp/l1-' + Math.random() });
  const t = s.createTask({ projectId: p.id, title: 'feat', complexity: 'easy' });
  assert.equal(s.lastRunErrorOf(t.id), null, '无失败 run → null');

  s.setOperations(t.id, 'do it');
  s.transition(t.id, 'queued');
  s.transition(t.id, 'executing');
  const run = s.startRun(t.id, 'executor', { worktree: '/tmp/w', branch: 'b' });
  s.failTaskAttempt(t.id, run.id, '第一次失败：编译错误');
  assert.equal(s.lastRunErrorOf(t.id), '第一次失败：编译错误');
  s.close();
});

test('buildPrompt：task.scopeFiles 非空 → 注入声明文件范围约束；为空 → 不注入', () => {
  const withScope = buildPrompt(fakeTask({ scopeFiles: ['src/foo/**', 'lib/a.ts'] }));
  assert.match(withScope, /声明的改动文件范围/);
  assert.match(withScope, /src\/foo\/\*\*/);
  assert.match(withScope, /越界会被硬闸拦截/);
  const noScope = buildPrompt(fakeTask({ scopeFiles: null }));
  assert.doesNotMatch(noScope, /声明的改动文件范围/);
});