import { test } from 'node:test'
import assert from 'node:assert/strict'
import path from 'node:path'
import { promises as fs } from 'node:fs'
import { execFile } from 'node:child_process'
import { promisify } from 'node:util'
import { finalizeChapter } from '../../src/finalize/index.js'
import { createGit } from '../../src/finalize/git.js'
import { gitBookCtx } from '../commands/_helper.js'

const execFileAsync = promisify(execFile)

function payload() {
  return {
    chapterNum: 3,
    frontMatter: {
      章号: 3,
      标题: '初露',
      卷: 1,
      视角: '林晚',
      字数: 100,
      章定位: '推进',
      钩子: '危机钩-强',
      情绪定位: '铺垫',
    },
    body: '林晚查到玉佩的第一条线索，心头巨震。\n',
    summary: '林晚查到玉佩的第一条线索。',
    threadUpdates: [
      { id: '伏笔-001', updates: { 最后推进章: 3 }, history: '第3章：推进——林晚查到线索' },
    ],
    characterUpdates: [{ name: '林晚', updates: { 最后变更章: 3 } }],
    timelineRows: [
      { volumeNum: 1, row: { 章: 3, 书内时间: '春月初三', 一句话事件: '查到玉佩线索', 在场: '林晚' } },
    ],
    commitLines: { 条目: '~伏笔-001', 设定: '林晚.最后变更章=3' },
    workspaceFiles: ['细纲.md'],
  }
}

test('finalizeChapter 正常定稿：落档 + git commit + 清工作区', async () => {
  const { ctx, cleanup } = await gitBookCtx()
  try {
    const git = createGit(ctx.repoPath)
    const before = await git.revCount()

    const r = await finalizeChapter(ctx, payload())
    assert.equal(r.ok, true, r.error)

    const ch = await fs.readFile(path.join(ctx.repoPath, '定稿/正文/0003-初露.md'), 'utf8')
    assert.match(ch, /标题: 初露/)
    await fs.access(path.join(ctx.repoPath, '定稿/摘要/章摘要/0003.md'))

    const log = await git.log()
    assert.match(log, /ch\(3\):/)
    assert.equal(await git.revCount(), before + 1)

    await assert.rejects(() => fs.access(path.join(ctx.repoPath, '工作区/细纲.md')))
  } finally {
    await cleanup()
  }
})

test('finalizeChapter 断电注入：无新 commit + 工作区原样 + 定稿净恢复（出口）', async () => {
  const { ctx, cleanup } = await gitBookCtx()
  try {
    const git = createGit(ctx.repoPath)
    const before = await git.revCount()

    const r = await finalizeChapter(ctx, payload(), { faultAfterWrite: true })
    assert.equal(r.ok, false)

    // 无新 commit
    assert.equal(await git.revCount(), before)
    // 工作区草稿原样（细纲还在）
    await fs.access(path.join(ctx.repoPath, '工作区/细纲.md'))
    // 定稿 未残留半成品章
    await assert.rejects(() => fs.access(path.join(ctx.repoPath, '定稿/正文/0003-初露.md')))
    // 定稿/大纲 工作树干净（回滚成功）
    const { stdout } = await execFileAsync(
      'git',
      ['status', '--porcelain', '--', '定稿', '大纲'],
      { cwd: ctx.repoPath, encoding: 'utf8' }
    )
    assert.equal(stdout.trim(), '')
  } finally {
    await cleanup()
  }
})

test('finalizeChapter 定稿后删 .cache 全量重建一致（不变量 2）', async () => {
  const { ctx, cleanup } = await gitBookCtx()
  try {
    const r = await finalizeChapter(ctx, payload())
    assert.equal(r.ok, true, r.error)

    await ctx.cache.rebuildFromSource(ctx.repoPath)
    const rows = await ctx.cache.query('SELECT * FROM chapters WHERE chapter_num = 3')
    assert.equal(rows.length, 1)
    assert.equal(rows[0].title, '初露')
  } finally {
    await cleanup()
  }
})