package main

import (
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"

	"git.x2erp.com/qdy/go-base/config"
	"git.x2erp.com/qdy/go-base/middleware"
	"git.x2erp.com/qdy/go-base/myservice"
	"git.x2erp.com/qdy/go-db/factory/database"
	"git.x2erp.com/qdy/go-db/myhandle"
	"git.x2erp.com/qdy/go-svc-agent/functions"
	"go-micro.dev/v4/web"
)

func main() {
	cfg, err := config.GetConfig()
	if err != nil {
		log.Printf("failed to load config: %v", err)
		return
	}

	serviceConfig := cfg.GetService()

	log.Printf("Service Port: %d", serviceConfig.Port)
	log.Printf("Service IdleTimeout: %d", serviceConfig.IdleTimeout)
	log.Printf("Service ReadTimeout: %d", serviceConfig.ReadTimeout)
	log.Printf("Service WriteTimeout: %d", serviceConfig.WriteTimeout)
	log.Printf("Service TrustedProxies: %s", serviceConfig.TrustedProxies)

	log.Printf("Using database type: %s", cfg.GetDatabase().Type)
	log.Printf("Database host: %s:%d", cfg.GetDatabase().Host, cfg.GetDatabase().Port)
	log.Printf("Database name: %s", cfg.GetDatabase().Database)
	log.Println("Database connection test passed!")

	// 启动微服务
	startMicroService(cfg)
}

// 启动微服务
func startMicroService(cfg config.IConfig) {

	serviceConfig := cfg.GetService()

	// 初始化数据库
	dbFactory, err := database.GetDBFactory()
	if err != nil {
		log.Fatalf("Failed to create DB factory: %v", err)
	}
	defer func() {
		if err := dbFactory.Close(); err != nil {
			log.Printf("Database close error: %v", err)
		}
	}()

	// 设置优雅关闭
	setupGracefulShutdown(dbFactory)

	webService := myservice.StartStandalone(cfg)

	// 注册HTTP路由到webService
	registerRoutes(webService, dbFactory)

	// 等待服务运行
	log.Printf("Service started successfully")
	log.Printf("   • Service: %s", serviceConfig.ServiceName)
	log.Printf("   • Port: %d", serviceConfig.Port)
	log.Printf("   • Mode: %s", getServiceMode(cfg))

	// 保持主程序运行
	select {}
}

// 判断是否使用注册中心
func shouldUseRegistry(cfg config.IConfig) bool {
	microConfig := cfg.GetMicro()
	// 如果有配置注册中心地址且不为空，则使用注册中心
	return microConfig.RegistryAddress != ""
}

// 获取服务模式描述
func getServiceMode(cfg config.IConfig) string {
	if shouldUseRegistry(cfg) {
		return "With Service Discovery"
	}
	return "Standalone"
}

// 注册所有路由
func registerRoutes(webService web.Service, dbFactory *database.DBFactory) {

	// 查询接口 - JSON
	webService.Handle("/api/query/json", middleware.JWTAuthMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		myhandle.QueryHandlerJson(w, r, dbFactory, functions.QueryToJSON)
	})))

	// 查询接口 - CSV
	webService.Handle("/api/query/csv", middleware.JWTAuthMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		myhandle.QueryHandlerBytes(w, r, dbFactory, functions.QueryToCSV)
	})))

	// 查询接口 - CSV with positional params
	webService.Handle("/api/query/csv/param", middleware.JWTAuthMiddleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		myhandle.QueryHandlerBytes(w, r, dbFactory, functions.QueryPositionalToCSV)
	})))
}

// 设置优雅关闭
func setupGracefulShutdown(dbFactory *database.DBFactory) {
	signalCh := make(chan os.Signal, 1)
	signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM)

	go func() {
		<-signalCh
		log.Println("\nReceived shutdown signal, closing database connection...")
		if err := dbFactory.Close(); err != nil {
			log.Printf("Error closing database: %v", err)
		}
		log.Println("Database connection closed gracefully")
		os.Exit(0)
	}()
}