/**
 * voko-server 的 composition root：读取 env、创建连接、装配服务，并统一管理资源生命周期。
 */

import { fileURLToPath } from 'node:url'
import { config as loadDotenv } from 'dotenv'
import { createAuth, createUserRepo } from '@drama/auth'
import { createBillingRepo, createLedger } from '@drama/billing'
import { createDb } from '@drama/db'
import { createLogger } from '@drama/observability'
import { createAccessRequests, createAgentAccess } from '@voko/access'
import { createAgents, createGuilds } from '@voko/exchange'

import { readEnv } from '../env.js'
import { createEmailPorts } from './email.js'
import { createGoogleOauthPort } from './google-oauth.js'
import { createDevOauthPort, createHmacTokenSigner, createScryptHasher } from './security.js'

/**
 * @param {{ service: string }} opts
 */
export async function createRuntime({ service }) {
  // 1. 加载 .env 并解析配置。
  loadDotenv({ path: fileURLToPath(new URL('../../.env', import.meta.url)) })
  const env = readEnv(process.env)
  const logger = createLogger({
    service,
    level: env.logLevel,
    format: env.nodeEnv === 'production' ? 'json' : 'pretty',
  })

  // 2. 连接与基础端口。
  const db = createDb({ url: env.databaseUrl })
  const { authEmail, accessNotifier } = createEmailPorts({ env, db, logger })
  const tokenSigner = createHmacTokenSigner({ secret: env.authTokenSecret })
  const hasher = createScryptHasher()
  const oauth = env.oauth.googleClientId === null
    ? createDevOauthPort()
    : createGoogleOauthPort({ clientId: env.oauth.googleClientId, clientSecret: env.oauth.googleClientSecret })

  // 3. 领域服务。
  const userRepo = createUserRepo(db)
  const auth = createAuth({ userRepo, email: authEmail, oauth, tokenSigner, hasher })
  const access = createAccessRequests({ db, notifier: accessNotifier })
  const agents = createAgents()
  const guilds = createGuilds({ db })
  const agentAccess = createAgentAccess({
    db,
    agents,
    public_url: env.publicUrl,
    // 启动积分 100：在认领事务里记账，幂等键由 agent_id 唯一决定。
    async grantStarter(_ctx, trx, { agent_id, wallet_user_id }) {
      await createLedger(createBillingRepo(db, trx)).grant({
        user_id: wallet_user_id,
        amount: 100,
        source: 'voko',
        credit_kind: 'admin',
        reason: 'vk_starter',
        ref_type: 'vk_agent',
        ref_id: agent_id,
        idempotency_key: `vk:starter:${agent_id}`,
      })
    },
  })

  /**
   * 注册：验证码校验与建用户在同一事务里完成。
   * @param {{ email: string, password: string, verification_code: string, locale: string }} input
   */
  async function register(input) {
    return db.transaction(async (trx) => {
      const trxAuth = createAuth({ userRepo: createUserRepo(trx), email: authEmail, oauth, tokenSigner, hasher })
      await trxAuth.verifyCode({ email: input.email, code: input.verification_code, purpose: 'register' })
      return trxAuth.register({ email: input.email, password: input.password, locale: input.locale, email_verified_at: new Date() })
    })
  }

  return {
    env,
    logger,
    services: { db, auth, userRepo, access, agents, guilds, agentAccess, register, oauthEnabled: env.oauth.googleClientId !== null },
    async close() {
      await db.destroy()
    },
  }
}