import fs from 'node:fs'
import path from 'node:path'
import pino from 'pino'
import { afterAll, beforeAll, describe, expect, it } from 'vitest'
import type { AgentEvent, ProviderStatusDto } from '@agent-server/shared'
import { createApp, type App } from '../src/app'
import { buildServer } from '../src/http/server'
import type { AgentProvider, RunContext } from '../src/providers/types'

/** 假引擎：输出文本 → 请求审批 → 写产出文件 */
class FakeProvider implements AgentProvider {
  readonly id = 'claude' as const
  lastCtx: RunContext | null = null
  async run(ctx: RunContext) {
    this.lastCtx = ctx
    ctx.setProviderSessionId('fake-session')
    ctx.emit('message.delta', { messageId: 'm1', text: '你好' })
    ctx.emit('message.completed', { messageId: 'm1', text: '你好' })
    if (ctx.input.text.includes('审批')) {
      ctx.emit('tool.started', { toolCallId: 't1', name: 'Bash', title: 'echo', input: { command: 'echo' } })
      const outcome = await ctx.interact({ kind: 'approval', tool: 'Bash', title: 'echo', input: {}, options: ['allow_once', 'allow_session', 'deny'] })
      ctx.emit('tool.completed', { toolCallId: 't1', status: outcome.resolution === 'allowed' ? 'ok' : 'denied', output: '', truncated: false })
    }
    if (ctx.input.text.includes('等待')) await new Promise((_, reject) => ctx.signal.addEventListener('abort', () => reject(new Error('aborted'))))
    fs.writeFileSync(path.join(ctx.workspaceDir, 'outputs/report.md'), '# 报告')
    return { usage: { inputTokens: 1, outputTokens: 2, cacheReadTokens: 0, cacheWriteTokens: 0, costUsd: 0.001 } }
  }
  async status(): Promise<ProviderStatusDto> {
    return { id: 'claude', enabled: true, available: true, loggedIn: true, account: 'test', cliPath: '', version: 'x', models: ['m'], defaultModel: 'm', message: null }
  }
}

let app: App
let server: Awaited<ReturnType<typeof buildServer>>
let apiKey: string
const fake = new FakeProvider()
const auth = () => ({ authorization: `Bearer ${apiKey}` })

async function waitFor<T>(fn: () => T | undefined, ms = 3000): Promise<T> {
  const end = Date.now() + ms
  while (Date.now() < end) {
    const v = fn()
    if (v) return v
    await new Promise(r => setTimeout(r, 20))
  }
  throw new Error('timeout')
}

const events = async (sid: string) =>
  (await server.inject({ method: 'GET', url: `/v1/sessions/${sid}/events`, headers: auth() })).json().items as AgentEvent[]

beforeAll(async () => {
  const log = pino({ level: 'silent' })
  app = createApp(log, { providers: { claude: fake } })
  server = await buildServer(app, { logger: log })
  apiKey = app.apiKeys.create('test').key
})
afterAll(() => server.close())

describe('鉴权', () => {
  it('没有 Key 返回 401', async () => {
    expect((await server.inject({ method: 'GET', url: '/v1/sessions' })).statusCode).toBe(401)
  })
  it('后台登录后可以访问管理接口', async () => {
    const login = await server.inject({ method: 'POST', url: '/admin/v1/auth/login', payload: { password: 'test-password' } })
    expect(login.statusCode).toBe(200)
    const cookie = login.cookies[0]!
    const res = await server.inject({ method: 'GET', url: '/admin/v1/settings', cookies: { [cookie.name]: cookie.value } })
    expect(res.statusCode).toBe(200)
    expect(res.json().settings.paths.workspaceRoot).toContain('workspaces')
  })
  it('错误密码返回 401', async () => {
    expect((await server.inject({ method: 'POST', url: '/admin/v1/auth/login', payload: { password: 'nope' } })).statusCode).toBe(401)
  })
})

describe('会话与 Run', () => {
  it('完整流程：上传 → 发送 → 审批 → 产出文件', async () => {
    const created = await server.inject({ method: 'POST', url: '/v1/sessions', headers: auth(), payload: {} })
    expect(created.statusCode).toBe(201)
    const sid = created.json().id as string

    const boundary = 'xBOUNDARYx'
    const upload = await server.inject({
      method: 'POST', url: `/v1/sessions/${sid}/files`,
      headers: { ...auth(), 'content-type': `multipart/form-data; boundary=${boundary}` },
      payload: `--${boundary}\r\nContent-Disposition: form-data; name="file"; filename="销售.csv"\r\nContent-Type: text/csv\r\n\r\na,b\n1,2\n\r\n--${boundary}--\r\n`,
    })
    expect(upload.statusCode).toBe(201)
    const fileId = upload.json()[0].id as string
    expect(upload.json()[0].path).toBe('uploads/销售.csv')

    const sent = await server.inject({ method: 'POST', url: `/v1/sessions/${sid}/messages`, headers: auth(), payload: { text: '请审批', attachments: [fileId] } })
    expect(sent.statusCode).toBe(202)
    const runId = sent.json().id as string

    // 会话忙时不能再发
    const busy = await server.inject({ method: 'POST', url: `/v1/sessions/${sid}/messages`, headers: auth(), payload: { text: 'x' } })
    expect(busy.statusCode).toBe(409)

    const itx = await waitFor(() => app.interactions.pendingFor(sid)[0])
    expect(fake.lastCtx?.input.attachments[0]?.path).toBe('uploads/销售.csv')
    const detail = await server.inject({ method: 'GET', url: `/v1/sessions/${sid}`, headers: auth() })
    expect(detail.json().status).toBe('waiting_input')

    const reply = await server.inject({ method: 'POST', url: `/v1/interactions/${itx.interactionId}`, headers: auth(), payload: { decision: 'allow_once' } })
    expect(reply.statusCode).toBe(200)
    const again = await server.inject({ method: 'POST', url: `/v1/interactions/${itx.interactionId}`, headers: auth(), payload: { decision: 'allow_once' } })
    expect(again.statusCode).toBe(409)

    await waitFor(() => app.runs.activeForSession(sid) === undefined || undefined)
    const run = (await server.inject({ method: 'GET', url: `/v1/runs/${runId}`, headers: auth() })).json()
    expect(run.status).toBe('completed')
    expect(run.usage.outputTokens).toBe(2)

    const types = (await events(sid)).map(e => e.type)
    expect(types).toEqual(expect.arrayContaining([
      'user.message', 'run.queued', 'run.started', 'message.completed', 'tool.started',
      'interaction.required', 'interaction.resolved', 'tool.completed', 'file.changed', 'usage', 'run.completed',
    ]))
    // 内存缓冲中包含瞬时的 delta 事件
    expect(types).toContain('message.delta')

    const files = (await server.inject({ method: 'GET', url: `/v1/sessions/${sid}/files`, headers: auth() })).json()
    const report = files.find((f: { path: string }) => f.path === 'outputs/report.md')
    expect(report.origin).toBe('agent')
    const dl = await server.inject({ method: 'GET', url: `/v1/files/${report.id}`, headers: auth() })
    expect(dl.body).toBe('# 报告')

    const session = (await server.inject({ method: 'GET', url: `/v1/sessions/${sid}`, headers: auth() })).json()
    expect(session.title).toBe('请审批')
  })

  it('中断运行中的 Run', async () => {
    const sid = (await server.inject({ method: 'POST', url: '/v1/sessions', headers: auth(), payload: {} })).json().id
    const runId = (await server.inject({ method: 'POST', url: `/v1/sessions/${sid}/messages`, headers: auth(), payload: { text: '等待' } })).json().id
    await waitFor(() => app.runs.activeForSession(sid)?.status === 'running' || undefined)
    expect((await server.inject({ method: 'POST', url: `/v1/runs/${runId}/interrupt`, headers: auth() })).statusCode).toBe(202)
    await waitFor(() => app.runs.activeForSession(sid) === undefined || undefined)
    expect(app.runs.get(runId).status).toBe('interrupted')
    expect((await events(sid)).at(-1)?.type).toBe('run.interrupted')
  })

  it('其他 API Key 看不到这个会话', async () => {
    const sid = (await server.inject({ method: 'POST', url: '/v1/sessions', headers: auth(), payload: {} })).json().id
    const otherKey = app.apiKeys.create('other').key
    const res = await server.inject({ method: 'GET', url: `/v1/sessions/${sid}`, headers: { authorization: `Bearer ${otherKey}` } })
    expect(res.statusCode).toBe(404)
  })

  it('删除会话同时删除工作区', async () => {
    const created = await app.sessions.create(app.apiKeys.list()[0]!.id, {})
    expect(fs.existsSync(created.workspaceDir)).toBe(true)
    await app.sessions.delete(created.id, 'admin')
    expect(fs.existsSync(created.workspaceDir)).toBe(false)
  })
})

describe('资料库', () => {
  it('拒绝不安全的路径', () => {
    expect(() => app.knowledge.create({ name: 'home', path: '~' })).toThrow(/全局禁止项/)
    expect(() => app.knowledge.create({ name: 'none', path: '/does/not/exist' })).toThrow(/不存在/)
  })
})