package net

import (
	"fmt"
	"net"
	"strconv"

	"cellbot/internal/engine"
	"cellbot/internal/protocol"
	"github.com/valyala/fasthttp"
	"go.uber.org/zap"
)

// Server HTTP服务器
type Server struct {
	host       string
	port       int
	logger     *zap.Logger
	botManager *protocol.BotManager
	eventBus   *engine.EventBus
	server     *fasthttp.Server
}

// NewServer 创建HTTP服务器
func NewServer(host string, port int, logger *zap.Logger, botManager *protocol.BotManager, eventBus *engine.EventBus) *Server {
	return &Server{
		host:       host,
		port:       port,
		logger:     logger.Named("server"),
		botManager: botManager,
		eventBus:   eventBus,
	}
}

// Start 启动服务器
func (s *Server) Start() error {
	s.server = &fasthttp.Server{
		Handler:            s.requestHandler,
		MaxConnsPerIP:      1000,
		MaxRequestsPerConn: 1000,
		ReadTimeout:        0,
		WriteTimeout:       0,
		IdleTimeout:        0,
		DisableKeepalive:   false,
	}

	addr := net.JoinHostPort(s.host, strconv.Itoa(s.port))
	s.logger.Info("Starting HTTP server", zap.String("address", addr))

	go func() {
		if err := s.server.ListenAndServe(addr); err != nil {
			s.logger.Error("Server error", zap.Error(err))
		}
	}()

	return nil
}

// Stop 停止服务器
func (s *Server) Stop() error {
	if s.server != nil {
		s.logger.Info("Stopping HTTP server")
		return s.server.Shutdown()
	}
	return nil
}

// requestHandler 请求处理器
func (s *Server) requestHandler(ctx *fasthttp.RequestCtx) {
	path := string(ctx.Path())
	method := string(ctx.Method())

	s.logger.Debug("Received request",
		zap.String("path", path),
		zap.String("method", method))

	// 路由处理
	switch path {
	case "/":
		s.handleRoot(ctx)
	case "/health":
		s.handleHealth(ctx)
	case "/bots":
		s.handleBots(ctx)
	case "/bots/create":
		s.handleCreateBot(ctx)
	case "/events/publish":
		s.handlePublishEvent(ctx)
	case "/events/subscribe":
		s.handleSubscribeEvent(ctx)
	default:
		ctx.Error("Not Found", fasthttp.StatusNotFound)
	}
}

// handleRoot 根路径处理
func (s *Server) handleRoot(ctx *fasthttp.RequestCtx) {
	ctx.SetContentType("application/json")
	ctx.SetBodyString(`{"message":"CellBot Server","version":"1.0.0"}`)
}

// handleHealth 健康检查
func (s *Server) handleHealth(ctx *fasthttp.RequestCtx) {
	ctx.SetContentType("application/json")
	ctx.SetBodyString(`{"status":"ok"}`)
}

// handleBots 获取机器人列表
func (s *Server) handleBots(ctx *fasthttp.RequestCtx) {
	bots := s.botManager.GetAll()
	ctx.SetContentType("application/json")

	if len(bots) == 0 {
		ctx.SetBodyString(`{"bots":[]}`)
		return
	}

	// 简化实现,实际应该序列化完整信息
	response := `{"bots":[`
	for i, bot := range bots {
		if i > 0 {
			response += ","
		}
		response += fmt.Sprintf(`{"id":"%s","name":"%s","status":"%s"}`,
			bot.GetID(), bot.Name(), bot.GetStatus())
	}
	response += `]}`

	ctx.SetBodyString(response)
}

// handleCreateBot 创建机器人
func (s *Server) handleCreateBot(ctx *fasthttp.RequestCtx) {
	if string(ctx.Method()) != "POST" {
		ctx.Error("Method Not Allowed", fasthttp.StatusMethodNotAllowed)
		return
	}

	ctx.SetContentType("application/json")
	ctx.SetBodyString(`{"message":"Bot creation not implemented yet"}`)
}

// handlePublishEvent 发布事件
func (s *Server) handlePublishEvent(ctx *fasthttp.RequestCtx) {
	if string(ctx.Method()) != "POST" {
		ctx.Error("Method Not Allowed", fasthttp.StatusMethodNotAllowed)
		return
	}

	// 解析请求体并发布事件
	// 这里简化实现,实际应该解析JSON并创建Event
	ctx.SetContentType("application/json")
	ctx.SetBodyString(`{"message":"Event published"}`)
}

// handleSubscribeEvent 订阅事件
func (s *Server) handleSubscribeEvent(ctx *fasthttp.RequestCtx) {
	if string(ctx.Method()) != "GET" {
		ctx.Error("Method Not Allowed", fasthttp.StatusMethodNotAllowed)
		return
	}

	ctx.SetContentType("application/json")
	ctx.SetBodyString(`{"message":"Event subscription not implemented yet"}`)
}