import { initDatabase, closeDb } from './db/database'
import { startWebSocketServer } from './transport/websocket'
import { syncWorker } from './sync/worker'
import { WorkflowEngine } from './workflow/engine'
import { ToolRegistry, readFileTool } from './tools/registry'
import type { AgentContext, LLMConfig, StreamCallbacks } from './types'

export * from './types'
export { WorkflowEngine } from './workflow/engine'
export { ToolRegistry, readFileTool } from './tools/registry'
export { LLMProvider } from './llm/provider'
export { llmConfigManager } from './llm/config'

// ============ 启动配置 ============

const WS_PORT = Number(process.env.AGENT_CORE_PORT) || 8787
const DB_DIR = process.env.AGENT_CORE_DB_DIR || './data'

/**
 * agent-core 入口
 * 启动 SQLite + WebSocket 服务器
 */
function main() {
  console.log('========================================')
  console.log('  dndClaw agent-core 启动中...')
  console.log('========================================')

  // 1. 初始化 SQLite
  initDatabase(DB_DIR)
  console.log(`[core] 数据库目录: ${DB_DIR}`)

  // 2. 启动 WebSocket
  const wss = startWebSocketServer(WS_PORT)
  console.log(`[core] WebSocket 端口: ${WS_PORT}`)

  // 3. 启动云端同步 Worker（本地变更 → outbox → 云端推送；云端变更 → 拉取合并）
  syncWorker.start()

  // 优雅退出
  process.on('SIGINT', () => {
    console.log('\n[core] 正在关闭...')
    syncWorker.stop()
    wss.close()
    closeDb()
    process.exit(0)
  })

  console.log('========================================')
  console.log('  dndClaw agent-core 已就绪')
  console.log('========================================')
}

// ============ 智能体工厂（供编程调用） ============

export function createAgent(config: LLMConfig) {
  const toolRegistry = new ToolRegistry()
  toolRegistry.register(readFileTool)

  const context: AgentContext = {
    messages: [],
    config,
    tools: toolRegistry.list()
  }

  const engine = new WorkflowEngine(context)

  return {
    async chat(userInput: string, callbacks?: StreamCallbacks) {
      return engine.run(userInput, callbacks)
    },
    getMessages() {
      return context.messages
    },
    clear() {
      context.messages = []
    },
    registerTool(
      name: string,
      description: string,
      execute: (params: Record<string, unknown>) => Promise<string>
    ) {
      toolRegistry.register({ name, description, parameters: {}, execute })
      context.tools = toolRegistry.list()
    },
    listTools() {
      return toolRegistry.list()
    }
  }
}

export type Agent = ReturnType<typeof createAgent>

// 直接运行时启动服务（ESM）
import { fileURLToPath } from 'url'
import { resolve } from 'path'
const __filename = fileURLToPath(import.meta.url)
if (process.argv[1] && resolve(process.argv[1]) === resolve(__filename)) {
  main()
}