package bootstraps

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"git.x2erp.com/qdy/go-base/client"
	"git.x2erp.com/qdy/go-base/config"
	"git.x2erp.com/qdy/go-base/consul"
	"git.x2erp.com/qdy/go-base/logger"
)

// 定义接口
type ShutdownHandler interface {
	OnShutdown()
}

// WebService Web服务实例
type WebService struct {
	serviceName     string
	HttpServer      *http.Server
	Router          *http.ServeMux
	quit            chan os.Signal
	shutdownHandler ShutdownHandler
	Port            int
	Ip              string
}

// Bootstrapper 服务启动器
type Bootstrapper struct {
	appName    string
	appVersion string
	Cfg        config.IConfig
	services   map[string]*WebService // 存储多个服务实例
	quit       chan os.Signal
}

// NewBootstrapper 创建启动器
func NewBootstrapper(name, version string) *Bootstrapper {
	b := &Bootstrapper{
		appName:    name,
		appVersion: version,
		quit:       make(chan os.Signal, 1),
		services:   make(map[string]*WebService),
	}

	b.init()

	return b
}

// Init 初始化配置和日志
func (b *Bootstrapper) init() *Bootstrapper {
	// 1. 初始化启动日志
	if err := logger.InitBootLog(b.appName); err != nil {
		log.Fatal("无法初始化启动日志: ", err)
	}

	// 2. 加载配置
	log.Println("正在加载配置...")
	cfg, err := config.GetConfig()
	if err != nil {
		log.Fatalf("加载配置失败: %v", err)
	}
	cfg.SetAppName(b.appName)
	cfg.SetAppVersion(b.appVersion)
	b.Cfg = cfg

	// 3. 初始化运行时日志
	logger.InitRuntimeLogger(b.appName, b.appVersion, b.Cfg.GetLog())
	log.Println("配置和日志初始化完成")

	return b
}

// CreateService 创建Web服务实例
func (b *Bootstrapper) createService(yamlNode string) *WebService {

	serviceCfg := b.Cfg.GetServiceConfig(yamlNode)

	// 检查是否已存在同名服务
	if _, exists := b.services[yamlNode]; exists {
		logger.Debug("服务 %s 已存在，将返回现有实例", yamlNode)
		return b.services[yamlNode]
	}

	io := client.GetServiceIP("")
	// 创建新的服务实例
	ws := &WebService{
		serviceName: serviceCfg.ServiceName,
		Router:      http.NewServeMux(),
		quit:        make(chan os.Signal, 1),
		Port:        serviceCfg.Port,
		Ip:          io,
	}

	// 创建HTTP服务器
	ws.HttpServer = &http.Server{
		Addr:         fmt.Sprintf(":%d", serviceCfg.Port),
		Handler:      ws.Router,
		ReadTimeout:  15 * time.Second,
		WriteTimeout: 15 * time.Second,
		IdleTimeout:  60 * time.Second,
	}

	// 存储服务实例
	b.services[yamlNode] = ws

	logger.Debug("已创建服务实例: %s (端口: %d)", serviceCfg.ServiceName, serviceCfg.Port)

	return ws
}

// GetAllServices 获取所有服务实例
func (b *Bootstrapper) GetAllServices() map[string]*WebService {
	return b.services
}

// StartService 启动指定服务
func (b *Bootstrapper) StartService(yamlNode string) *Bootstrapper {

	service := b.createService(yamlNode)

	log.Printf("正在启动服务: %s ", service.serviceName)
	log.Printf("模式: 独立运行 (net/http)")
	log.Printf("服务端口: :%d", service.Port)

	return b
}

// Run 运行所有服务
func (b *Bootstrapper) Run(shutdownHandler ShutdownHandler) {
	if len(b.services) == 0 {
		log.Fatal("没有要运行的服务，请先创建服务实例")
	}

	log.Printf("开始运行 %d 个服务...", len(b.services))

	// 设置全局信号监听
	signal.Notify(b.quit, syscall.SIGINT, syscall.SIGTERM)

	// 启动所有服务
	for serviceName, service := range b.services {
		go func(name string, ws *WebService) {

			consul.Register(service.serviceName, service.Ip, service.Port, b.Cfg.GetConsulConfig())

			log.Printf("启动服务 %s 在 %s", name, ws.HttpServer.Addr)
			if err := ws.HttpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
				log.Fatalf("服务 %s 运行失败: %v", name, err)
			}
		}(serviceName, service)
	}

	// 等待中断信号
	b.waitForShutdown(shutdownHandler)
}

// RunSingle 运行单个服务
func (b *Bootstrapper) RunSingle(yamlNode string, shutdownHandler ShutdownHandler) {
	service := b.createService(yamlNode)

	log.Printf("服务 %s 开始运行...", service.serviceName)

	// 设置服务级别的信号监听
	signal.Notify(service.quit, syscall.SIGINT, syscall.SIGTERM)

	// 启动服务
	go func() {
		log.Printf("服务器启动在 %s", service.HttpServer.Addr)
		if err := service.HttpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("服务运行失败: %v", err)
		}
	}()

	consul.Register(service.serviceName, service.Ip, service.Port, b.Cfg.GetConsulConfig())

	// 等待中断信号
	b.waitForServiceShutdown(service, shutdownHandler)
}

// RunTLS 运行HTTPS服务
func (b *Bootstrapper) RunTLS(serviceName, certFile, keyFile string, shutdownHandler ShutdownHandler) {
	service := b.createService(serviceName)

	log.Printf("服务 %s 开始运行(HTTPS)...", service.serviceName)

	// 设置服务级别的信号监听
	signal.Notify(service.quit, syscall.SIGINT, syscall.SIGTERM)

	// 启动HTTPS服务器
	go func() {
		log.Printf("HTTPS服务器启动在 %s", service.HttpServer.Addr)
		if err := service.HttpServer.ListenAndServeTLS(certFile, keyFile); err != nil && err != http.ErrServerClosed {
			log.Fatalf("服务运行失败: %v", err)
		}
	}()

	// 等待中断信号
	b.waitForServiceShutdown(service, shutdownHandler)
}

// waitForShutdown 等待关闭信号（关闭所有服务）
func (b *Bootstrapper) waitForShutdown(handler ShutdownHandler) {
	log.Println("按 Ctrl+C 停止所有服务")

	// 等待信号
	<-b.quit
	log.Println("接收到终止信号，正在优雅关闭所有服务...")

	// 创建关闭上下文，给30秒完成当前请求
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	// 关闭所有服务
	shutdownComplete := make(chan bool, len(b.services))

	for serviceName, service := range b.services {
		go func(name string, ws *WebService) {
			log.Printf("正在关闭服务: %s", name)
			//退出注册中心
			consul.Deregister(service.serviceName, service.Ip, service.Port)

			if err := ws.HttpServer.Shutdown(ctx); err != nil {
				log.Printf("服务 %s 关闭失败: %v", name, err)
			} else {
				log.Printf("服务 %s 已关闭", name)
			}
			shutdownComplete <- true
		}(serviceName, service)
	}

	// 等待所有服务关闭完成
	for i := 0; i < len(b.services); i++ {
		<-shutdownComplete
	}

	// 执行关闭处理
	if handler != nil {
		handler.OnShutdown()
	}

	// 停止日志写入
	logger.StopESWriter()
	log.Println("所有服务优雅关闭完成")

	// 等待一小段时间确保日志写入完成
	time.Sleep(100 * time.Millisecond)
	os.Exit(0)
}

// waitForServiceShutdown 等待单个服务关闭
func (b *Bootstrapper) waitForServiceShutdown(service *WebService, handler ShutdownHandler) {

	log.Printf("按 Ctrl+C 停止服务 %s", service.serviceName)

	// 等待信号
	<-service.quit
	log.Printf("接收到终止信号，正在优雅关闭服务 %s...", service.serviceName)

	//退出注册中心
	consul.Deregister(service.serviceName, service.Ip, service.Port)

	// 创建关闭上下文，给30秒完成当前请求
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	// 停止接收新请求，完成当前请求
	if err := service.HttpServer.Shutdown(ctx); err != nil {
		log.Printf("服务 %s 关闭失败: %v", service.serviceName, err)
	} else {
		log.Printf("服务 %s 已关闭", service.serviceName)
	}

	// 执行关闭处理
	if handler != nil {
		handler.OnShutdown()
	}

	// 停止日志写入
	logger.StopESWriter()
	log.Printf("服务 %s 优雅关闭完成", service.serviceName)

	// 等待一小段时间确保日志写入完成
	time.Sleep(100 * time.Millisecond)
	os.Exit(0)
}

// GetConfig 获取配置
func (b *Bootstrapper) GetConfig() config.IConfig {
	return b.Cfg
}

// GetRouter 获取指定服务的路由器
func (b *Bootstrapper) GetRouter(yamlNode string) *http.ServeMux {
	service := b.createService(yamlNode)
	return service.Router
}

// GetRouterDefault 获取第一个服务的路由器（兼容性方法）
func (b *Bootstrapper) GetRouterDefault() *http.ServeMux {
	for _, service := range b.services {
		return service.Router
	}
	// 如果没有服务，创建默认路由器（向后兼容）
	return http.NewServeMux()
}

// Handle 注册路由处理器到指定服务
func (b *Bootstrapper) Handle(serviceName, pattern string, handler http.Handler) bool {
	if service, exists := b.services[serviceName]; exists {
		service.Router.Handle(pattern, handler)
		return true
	}
	log.Printf("错误: 服务 %s 不存在", serviceName)
	return false
}

// SetShutdownHandler 为服务设置关闭处理器
func (b *Bootstrapper) SetShutdownHandler(serviceName string, handler ShutdownHandler) bool {
	if service, exists := b.services[serviceName]; exists {
		service.shutdownHandler = handler
		return true
	}
	return false
}

// ========== WebService 的方法 ==========

// GetServiceName 获取服务名称
func (ws *WebService) GetServiceName() string {
	return ws.serviceName
}

// // GetServiceConfig 获取服务配置
// func (ws *WebService) GetServiceConfig() *subconfigs.ServiceConfig {
// 	return ws.serviceConfig
// }

// GetRouter 获取服务的路由器
func (ws *WebService) GetRouter() *http.ServeMux {
	return ws.Router
}

// Handle 注册路由处理器
func (ws *WebService) Handle(pattern string, handler http.Handler) {
	ws.Router.Handle(pattern, handler)
}

// SetShutdownHandler 设置关闭处理器
func (ws *WebService) SetShutdownHandler(handler ShutdownHandler) {
	ws.shutdownHandler = handler
}

// Run 运行单个服务
func (ws *WebService) Run(shutdownHandler ShutdownHandler) {
	log.Printf("服务 %s 开始运行...", ws.serviceName)

	// 设置信号监听
	signal.Notify(ws.quit, syscall.SIGINT, syscall.SIGTERM)

	// 启动服务
	go func() {
		log.Printf("服务器启动在 %s", ws.HttpServer.Addr)
		if err := ws.HttpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("服务 %s 运行失败: %v", ws.serviceName, err)
		}
	}()

	// 等待中断信号
	log.Printf("按 Ctrl+C 停止服务 %s", ws.serviceName)
	<-ws.quit

	log.Printf("接收到终止信号，正在优雅关闭服务 %s...", ws.serviceName)

	// 创建关闭上下文
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	// 关闭服务
	if err := ws.HttpServer.Shutdown(ctx); err != nil {
		log.Printf("服务 %s 关闭失败: %v", ws.serviceName, err)
	} else {
		log.Printf("服务 %s 已关闭", ws.serviceName)
	}

	// 执行关闭处理
	if shutdownHandler != nil {
		shutdownHandler.OnShutdown()
	} else if ws.shutdownHandler != nil {
		ws.shutdownHandler.OnShutdown()
	}

	log.Printf("服务 %s 优雅关闭完成", ws.serviceName)
	time.Sleep(100 * time.Millisecond)
	os.Exit(0)
}