import fs from 'node:fs'
import os from 'node:os'
import path from 'node:path'
import pino from 'pino'
import { strToU8, unzipSync, zipSync } from 'fflate'
import { afterAll, beforeAll, describe, expect, it } from 'vitest'
import { createApp, type App } from '../src/app'
import { config, customSkillsDir, customSkillStoreDir } from '../src/config'
import { LIMITS, normalizeRelPath } from '../src/custom-skills/store'
import { resolveSkills } from '../src/providers/claude/skills'
import { skillsToDisable } from '../src/providers/codex/skills'
import { checkAccess, resolveAccess } from '../src/services/access-policy'

let app: App
const audits: string[] = []
const live = (name: string, f = 'SKILL.md') => path.join(customSkillsDir(), 'skills', name, f)
const md = (name: string, desc = `${name} 的说明：处理某类业务数据的流程与规范`) => `---\nname: ${name}\ndescription: ${desc}\n---\n# ${name}\n`

/** 一个插件格式的技能源目录：skills/alpha、skills/beta（含指向 /etc/passwd 的符号链接） */
function makeSourceDir(): string {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'skill-src-'))
  for (const n of ['alpha', 'beta']) {
    fs.mkdirSync(path.join(root, 'skills', n, 'references'), { recursive: true })
    fs.writeFileSync(path.join(root, 'skills', n, 'SKILL.md'), md(n))
    fs.writeFileSync(path.join(root, 'skills', n, 'references', 'guide.md'), `${n} guide v1\nline2\n`)
  }
  fs.symlinkSync('/etc/passwd', path.join(root, 'skills', 'beta', 'passwd'))
  return root
}

beforeAll(() => {
  app = createApp(pino({ level: 'silent' }), { providers: {} })
  const orig = app.audit.log.bind(app.audit)
  app.audit.log = (e: Parameters<typeof orig>[0]) => { audits.push(e.summary); return orig(e) }
})
afterAll(() => app.skillSources.stop())

describe('自定义技能：目录技能源导入与同步', () => {
  let srcDir: string
  let sourceId: string

  it('C-01 扫描出 2 个技能并导入；两个引擎的 ID 为 custom-skills:<name>；符号链接被跳过（C-03）', () => {
    srcDir = makeSourceDir()
    const s = app.skillSources.create({ name: '业务仓库', description: '', path: srcDir, syncMode: 'manual', intervalMin: 10 })
    sourceId = s.id
    const scan = app.skillSources.scan(sourceId)
    expect(scan.skills.map(x => [x.name, x.status, x.path, x.fileCount])).toEqual([['alpha', 'new', 'skills/alpha', 2], ['beta', 'new', 'skills/beta', 2]])
    expect(scan.skipped).toEqual(['skills/beta/passwd（符号链接）'])

    const r = app.skillSources.import(sourceId, ['alpha', 'beta'], scan.digest)
    expect(r.imported.map(x => [x.name, x.version, x.created])).toEqual([['alpha', 1, true], ['beta', 1, true]])
    expect(fs.readFileSync(live('alpha'), 'utf8')).toContain('name: alpha')
    expect(fs.existsSync(live('beta', 'passwd'))).toBe(false)
    expect(app.customSkills.list().map(x => [x.name, x.origin, x.publishedVersion, x.sourceName])).toEqual([['alpha', 'imported', 1, '业务仓库'], ['beta', 'imported', 1, '业务仓库']])
    expect(app.skillSources.list()[0]!.skillNames).toEqual(['alpha', 'beta'])
    expect(app.customSkills.pluginRef()!.skills.map(s => [s.id, s.optIn])).toEqual([['custom-skills:alpha', true], ['custom-skills:beta', true]])
  })

  it('C-02 修改来源中的一个参考文件：同步只显示该文件的变化，导入后生效目录更新', () => {
    fs.writeFileSync(path.join(srcDir, 'skills', 'alpha', 'references', 'guide.md'), 'alpha guide v2\nline2\n')
    const scan = app.skillSources.scan(sourceId)
    const alpha = scan.skills.find(s => s.name === 'alpha')!
    expect(alpha.status).toBe('changed')
    expect(alpha.changes).toEqual({ added: [], modified: ['references/guide.md'], removed: [] })
    expect(scan.skills.find(s => s.name === 'beta')!.status).toBe('unchanged')
    // 扫描后来源又变了：拒绝导入未审阅的内容
    fs.writeFileSync(path.join(srcDir, 'skills', 'alpha', 'extra.md'), 'x')
    expect(() => app.skillSources.import(sourceId, ['alpha'], scan.digest)).toThrow(/重新扫描/)
    fs.rmSync(path.join(srcDir, 'skills', 'alpha', 'extra.md'))
    const again = app.skillSources.scan(sourceId)
    expect(app.skillSources.import(sourceId, ['alpha'], again.digest).imported).toEqual([{ name: 'alpha', version: 2, created: false }])
    expect(fs.readFileSync(live('alpha', 'references/guide.md'), 'utf8')).toBe('alpha guide v2\nline2\n')
    const id = app.customSkills.list().find(s => s.name === 'alpha')!.id
    expect(app.customSkills.diff(id, 1, 2)[0]).toMatchObject({ path: 'references/guide.md', status: 'modified' })
    expect(app.customSkills.diff(id, 1, 2)[0]!.patch).toContain('-alpha guide v1')
  })

  it('来源中删除的技能只提示，不自动删除；同名冲突拒绝；导入的技能只读，转为可编辑后可改', () => {
    fs.rmSync(path.join(srcDir, 'skills', 'beta'), { recursive: true })
    expect(app.skillSources.scan(sourceId).missing).toEqual(['beta'])
    expect(fs.existsSync(live('beta'))).toBe(true)

    const other = fs.mkdtempSync(path.join(os.tmpdir(), 'skill-src2-'))
    fs.mkdirSync(path.join(other, 'alpha'))
    fs.writeFileSync(path.join(other, 'alpha', 'SKILL.md'), md('alpha'))
    const s2 = app.skillSources.create({ name: '另一个来源', description: '', path: other, syncMode: 'manual', intervalMin: 10 })
    expect(app.skillSources.scan(s2.id).skills[0]).toMatchObject({ name: 'alpha', status: 'conflict' })

    const alphaId = app.customSkills.list().find(s => s.name === 'alpha')!.id
    expect(() => app.customSkills.writeFile(alphaId, 'x.md', Buffer.from('x'))).toThrow(/只读/)
    expect(app.customSkills.detach(alphaId).origin).toBe('authored')
  })

  it('自动同步：到期后导入有变化的技能并记入审计', async () => {
    const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'skill-auto-'))
    fs.writeFileSync(path.join(dir, 'SKILL.md'), md('gamma'))
    const s = app.skillSources.create({ name: '自动', description: '', path: dir, syncMode: 'auto', intervalMin: 1 })
    await app.skillSources.runAutoSyncNow()
    expect(app.customSkills.list().find(x => x.name === 'gamma')).toMatchObject({ publishedVersion: 1, sourceId: s.id })
    expect(audits.some(a => a.startsWith('自动同步技能源 自动'))).toBe(true)
  })

  it('技能源路径校验：不能使用服务数据目录、不存在的 home 路径给出提示', () => {
    expect(() => app.skillSources.create({ name: 'x', description: '', path: config.dataDir, syncMode: 'manual', intervalMin: 10 })).toThrow(/服务数据目录/)
    expect(() => app.skillSources.create({ name: 'x', description: '', path: '/home/nobody/none', syncMode: 'manual', intervalMin: 10 })).toThrow(/ProtectHome/)
  })
})

describe('自定义技能：zip 上传', () => {
  it('上传 zip（带顶层目录）导入；不安全路径跳过并审计（C-03）', () => {
    const zip = zipSync({
      'pack/delta/SKILL.md': strToU8(md('delta')),
      'pack/delta/templates/report.pptx': new Uint8Array([80, 75, 3, 4, 1, 2, 3]),
      '../evil.md': strToU8('x'),
      '__MACOSX/pack/._delta': strToU8('x'),
    })
    const { source, scan } = app.skillSources.upload('pack.zip', Buffer.from(zip))
    expect(source.kind).toBe('upload')
    expect(scan.skills.map(s => [s.name, s.path, s.fileCount])).toEqual([['delta', 'pack/delta', 2]])
    expect(scan.skipped).toEqual(['../evil.md（路径不安全）'])
    expect(audits.some(a => a.includes('上传技能包 pack.zip') && a.includes('跳过 1 个'))).toBe(true)
    app.skillSources.import(source.id, ['delta'], scan.digest)
    expect([...fs.readFileSync(live('delta', 'templates/report.pptx'))]).toEqual([80, 75, 3, 4, 1, 2, 3])
  })

  it('按实际解压字节数限制大小（防压缩炸弹）', () => {
    const saved = LIMITS.unzipBytes
    LIMITS.unzipBytes = 1048576
    try {
      const bomb = zipSync({ 'big/SKILL.md': new Uint8Array(3 * 1048576) }, { level: 9 })
      expect(bomb.length).toBeLessThan(100_000)
      expect(() => app.skillSources.upload('bomb.zip', Buffer.from(bomb))).toThrow(/解压后超过/)
    } finally {
      LIMITS.unzipBytes = saved
    }
    expect(() => app.skillSources.upload('bad.zip', Buffer.from('not a zip'))).toThrow()
  })
})

describe('自定义技能：在线编写、草稿与发布、版本', () => {
  let id: string

  it('C-04 新建 → 上传模版并保存为草稿：不生效；发布后生效；恢复到上一版本', () => {
    const d = app.customSkills.create({ name: 'report-kit', description: '生成月度报告的规范与模版，涉及月报时使用' })
    id = d.id
    expect(d.versions.map(v => [v.version, v.reason])).toEqual([[1, 'create']])
    expect(d.publishedVersion).toBeNull()
    expect(fs.existsSync(live('report-kit'))).toBe(false)

    app.customSkills.writeFile(id, 'templates/a.pptx', Buffer.from([1, 2, 3]))
    expect(app.customSkills.detail(id).hasUnsavedChanges).toBe(true)
    const v2 = app.customSkills.save(id, { baseVersion: 1, publish: false })
    expect([v2.latestVersion, v2.publishedVersion, v2.hasUnsavedChanges]).toEqual([2, null, false])
    expect(fs.existsSync(live('report-kit'))).toBe(false)
    // 内容无变化不产生新版本；基于旧版本保存时冲突
    expect(app.customSkills.save(id, { baseVersion: 2, publish: false }).latestVersion).toBe(2)
    expect(() => app.customSkills.save(id, { baseVersion: 1, publish: false })).toThrow(/刷新/)

    expect(app.customSkills.publish(id, 2).publishedVersion).toBe(2)
    expect([...fs.readFileSync(live('report-kit', 'templates/a.pptx'))]).toEqual([1, 2, 3])

    app.customSkills.writeFile(id, 'templates/a.pptx', Buffer.from([9]))
    app.customSkills.writeFile(id, 'SKILL.md', Buffer.from(md('report-kit', '新版描述：生成月度报告的规范与模版，涉及月报时使用')))
    const v3 = app.customSkills.save(id, { baseVersion: 2, publish: true })
    expect([v3.latestVersion, v3.publishedVersion, v3.description]).toEqual([3, 3, '新版描述：生成月度报告的规范与模版，涉及月报时使用'])
    expect(v3.versions[0]!.changed).toEqual({ added: [], modified: ['SKILL.md', 'templates/a.pptx'], removed: [] })

    const v4 = app.customSkills.restore(id, 2)
    expect([v4.latestVersion, v4.publishedVersion, v4.versions[0]!.reason]).toEqual([4, 4, 'restore'])
    expect([...fs.readFileSync(live('report-kit', 'templates/a.pptx'))]).toEqual([1, 2, 3])
  })

  it('SKILL.md 校验、路径安全、重命名与删除、放弃改动、导出 zip', () => {
    app.customSkills.writeFile(id, 'SKILL.md', Buffer.from('---\nname: other\ndescription: x\n---\n'))
    expect(() => app.customSkills.save(id, { baseVersion: 4, publish: false })).toThrow(/不一致/)
    app.customSkills.discard(id)
    expect(() => app.customSkills.writeFile(id, '../escape.md', Buffer.from('x'))).toThrow(/路径不正确/)
    expect(() => normalizeRelPath('/abs')).toThrow()
    expect(() => app.customSkills.deleteFile(id, 'SKILL.md')).toThrow(/不能删除/)
    app.customSkills.writeFile(id, 'refs/a.md', Buffer.from('a'))
    expect(app.customSkills.move(id, 'refs', 'references').files.map(f => f.path)).toEqual(['SKILL.md', 'references/a.md', 'templates/a.pptx'])
    expect(app.customSkills.deleteFile(id, 'references').files.map(f => f.path)).toEqual(['SKILL.md', 'templates/a.pptx'])

    const z = app.customSkills.exportZip(id)
    expect(z.name).toBe('report-kit-v4.zip')
    expect(Object.keys(unzipSync(new Uint8Array(z.data))).sort()).toEqual(['report-kit/SKILL.md', 'report-kit/templates/a.pptx'])
  })
})

describe('自定义技能：使用、沙箱与恢复', () => {
  it('C-05 "全部技能"不包含自定义技能（可逐个设置包含）；单独勾选后加载', () => {
    const plugins = [
      { name: 'agent-skills', path: '/a', skills: [{ id: 'agent-skills:r', loadId: 'agent-skills:r' }] },
      app.customSkills.pluginRef()!,
    ]
    expect(resolveSkills('all', plugins).skills).toEqual(['agent-skills:r'])
    expect(resolveSkills(['custom-skills:report-kit'], plugins).skills).toEqual(['custom-skills:report-kit'])

    const id = app.customSkills.list().find(s => s.name === 'report-kit')!.id
    app.customSkills.setFlags(id, { includeInAll: true })
    expect(resolveSkills('all', [plugins[0]!, app.customSkills.pluginRef()!]).skills).toContain('custom-skills:report-kit')
    expect(app.customSkills.excludedFromAll()).not.toContain('custom-skills:report-kit')

    // Codex：all 时禁用需要单独勾选的自定义技能
    const all = [
      { name: 'custom-skills:alpha', path: path.join(customSkillsDir(), 'skills/alpha/SKILL.md') },
      { name: 'custom-skills:Report Kit', path: path.join(customSkillsDir(), 'skills/report-kit/SKILL.md') },
    ].map(s => ({ ...s, scope: 'user' as const, description: '', enabled: true, pluginId: null }))
    expect(skillsToDisable(all, 'all', '/nohome', 'agent-skills', false, app.customSkills.excludedFromAll()).map(d => path.basename(path.dirname(d.path)))).toEqual(['alpha'])
  })

  it('停用后不加载，启用后恢复；指纹随之变化', () => {
    const id = app.customSkills.list().find(s => s.name === 'alpha')!.id
    const before = app.customSkills.fingerprint()
    app.customSkills.setFlags(id, { enabled: false })
    expect(fs.existsSync(live('alpha'))).toBe(false)
    expect(app.customSkills.skillInfos().map(s => s.name)).not.toContain('alpha')
    expect(app.customSkills.fingerprint()).not.toBe(before)
    app.customSkills.setFlags(id, { enabled: true })
    expect(fs.existsSync(live('alpha'))).toBe(true)
  })

  it('C-06 沙箱：生效目录只读可见，不能写；版本库不可读', () => {
    const settings = app.settings.get()
    const ws = path.join(config.dataDir, 'workspaces', 'ses_cs')
    fs.mkdirSync(ws, { recursive: true })
    const access = resolveAccess({ policy: { mode: 'restricted', read: [], write: [], deny: [] }, knowledgeRoots: [], selectedKnowledgeRootIds: [], workspaceDir: ws, settings })
    expect(checkAccess(access, live('alpha'), 'read').allowed).toBe(true)
    expect(checkAccess(access, live('alpha'), 'write').allowed).toBe(false)
    expect(checkAccess(access, path.join(customSkillStoreDir(), 'ab', 'x'), 'read').allowed).toBe(false)
    const broad = resolveAccess({ policy: { mode: 'broad', read: [], write: [], deny: [] }, knowledgeRoots: [], selectedKnowledgeRootIds: [], workspaceDir: ws, settings })
    expect(checkAccess(broad, path.join(customSkillStoreDir(), 'ab', 'x'), 'read').allowed).toBe(false)
    expect(checkAccess(broad, live('alpha'), 'read').allowed).toBe(true)
  })

  it('C-07 删除被两个 Profile 使用的技能：从两个 Profile 中移除', () => {
    const { id: _i, version: _v, updatedAt: _u, builtin: _b, ...input } = app.profiles.getBuiltin()
    const p1 = app.profiles.create({ ...input, name: 'p1', isDefault: false, skills: ['custom-skills:gamma', 'agent-skills:r'] })
    const p2 = app.profiles.create({ ...input, name: 'p2', isDefault: false, skills: ['custom-skills:gamma'] })
    const gamma = app.customSkills.list().find(s => s.name === 'gamma')!
    expect(gamma.profileNames.sort()).toEqual(['p1', 'p2'])
    app.customSkills.delete(gamma.id)
    expect(app.profiles.get(p1.id).skills).toEqual(['agent-skills:r'])
    expect(app.profiles.get(p2.id).skills).toEqual([])
    expect(fs.existsSync(live('gamma'))).toBe(false)
  })

  it('C-08 重启时按数据库重建：被删除或改动的生效目录恢复，多余目录移除', () => {
    fs.rmSync(path.join(customSkillsDir(), 'skills', 'alpha'), { recursive: true })
    fs.writeFileSync(live('report-kit'), 'tampered')
    fs.mkdirSync(path.join(customSkillsDir(), 'skills', 'stray'))
    const logs: string[] = []
    app.customSkills.reconcile(m => logs.push(m))
    expect(fs.readFileSync(live('alpha'), 'utf8')).toContain('name: alpha')
    expect(fs.existsSync(path.join(customSkillsDir(), 'skills', 'stray'))).toBe(false)
    expect(logs.some(l => l.includes('alpha'))).toBe(true)
    // 改动文件内容但标记未变：按标记判断不重新发布（运行时目录只能由服务写入）
    expect(logs.some(l => l.includes('stray'))).toBe(true)
  })
})