// entry function
package main

import (
	"context"
	"flag"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"modelRT/alert"
	"modelRT/config"
	"modelRT/database"
	"modelRT/diagram"
	locker "modelRT/distributedlock"
	_ "modelRT/docs"
	"modelRT/handler"
	"modelRT/logger"
	"modelRT/middleware"
	"modelRT/pool"
	"modelRT/router"

	realtimedata "modelRT/real-time-data"

	"github.com/gin-gonic/gin"
	"github.com/panjf2000/ants/v2"
	swaggerFiles "github.com/swaggo/files"
	ginSwagger "github.com/swaggo/gin-swagger"
	"gorm.io/gorm"
)

var limiter *middleware.Limiter

func init() {
	limiter = middleware.NewLimiter(10, 1*time.Minute) // 设置限流器，允许每分钟最多请求10次
}

var (
	modelRTConfigDir  = flag.String("modelRT_config_dir", "./config", "config file dir of model runtime service")
	modelRTConfigName = flag.String("modelRT_config_name", "config", "config file name of model runtime service")
	modelRTConfigType = flag.String("modelRT_config_type", "yaml", "config file type of model runtime service")
)

var (
	modelRTConfig    config.ModelRTConfig
	postgresDBClient *gorm.DB
	alertManager     *alert.EventManager
)

// TODO 使用 wire 依赖注入管理 DVIE 面板注册的 panel
func main() {
	flag.Parse()
	ctx := context.TODO()

	// init logger
	logger.InitLoggerInstance(modelRTConfig.LoggerConfig)

	modelRTConfig = config.ReadAndInitConfig(*modelRTConfigDir, *modelRTConfigName, *modelRTConfigType)
	// init postgresDBClient
	postgresDBClient = database.InitPostgresDBInstance(ctx, modelRTConfig.PostgresDBURI)

	defer func() {
		sqlDB, err := postgresDBClient.DB()
		if err != nil {
			panic(err)
		}
		sqlDB.Close()
	}()

	// init alert manager
	_ = alert.InitAlertEventManager()

	// init model parse ants pool
	parsePool, err := ants.NewPoolWithFunc(modelRTConfig.ParseConcurrentQuantity, pool.ParseFunc)
	if err != nil {
		logger.Error(ctx, "init concurrent parse task pool failed", "error", err)
		panic(err)
	}
	defer parsePool.Release()

	storageClient := diagram.InitClientInstance(modelRTConfig.StorageRedisConfig)
	defer storageClient.Close()

	lockerClient := locker.InitClientInstance(modelRTConfig.LockerRedisConfig)
	defer lockerClient.Close()

	// init anchor param ants pool
	anchorRealTimePool, err := pool.AnchorPoolInit(modelRTConfig.RTDReceiveConcurrentQuantity)
	if err != nil {
		logger.Error(ctx, "init concurrent anchor param task pool failed", "error", err)
		panic(err)
	}
	defer anchorRealTimePool.Release()

	// init cancel context
	cancelCtx, cancel := context.WithCancel(ctx)
	defer cancel()
	// init real time data receive channel
	go realtimedata.ReceiveChan(cancelCtx)

	postgresDBClient.Transaction(func(tx *gorm.DB) error {
		// load circuit diagram from postgres
		componentTypeMap, err := database.QueryCircuitDiagramComponentFromDB(cancelCtx, tx, parsePool)
		if err != nil {
			logger.Error(ctx, "load circuit diagrams from postgres failed", "error", err)
			panic(err)
		}

		// TODO 暂时屏蔽完成 swagger 启动测试
		tree, err := database.QueryTopologicFromDB(ctx, tx, componentTypeMap)
		if err != nil {
			logger.Error(ctx, "load topologic info from postgres failed", "error", err)
			panic(err)
		}
		diagram.GlobalTree = tree
		return nil
	})

	// TODO 完成订阅数据分析
	// TODO 暂时屏蔽完成 swagger 启动测试
	// go realtimedata.RealTimeDataComputer(ctx, nil, []string{}, "")

	engine := gin.New()
	router.RegisterRoutes(engine)
	server := http.Server{
		Addr:    ":8080",
		Handler: engine,
	}

	// creating a System Signal Receiver
	done := make(chan os.Signal, 10)
	signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
	go func() {
		<-done
		if err := server.Shutdown(context.Background()); err != nil {
			logger.Error(ctx, "ShutdownServerError", "err", err)
		}
	}()

	logger.Info(ctx, "Starting ModelRT server...")
	err = server.ListenAndServe()
	if err != nil {
		if err == http.ErrServerClosed {
			// the service receives the shutdown signal normally and then closes
			logger.Info(ctx, "Server closed under request")
		} else {
			// abnormal shutdown of service
			logger.Error(ctx, "Server closed unexpected", "err", err)
		}
	}

	// real time data api
	engine.GET("/ws/rtdatas", handler.RealTimeDataReceivehandler)

	// anchor api
	engine.POST("/model/anchor_replace", handler.ComponentAnchorReplaceHandler)

	// alert api
	engine.GET("/alert/events/query", handler.QueryAlertEventHandler)

	// real time data api
	engine.GET("/rt/datas/query", handler.QueryRealTimeDataHandler)

	// dashborad api
	dashboard := engine.Group("/dashboard", limiter.Middleware)
	{
		dashboard.GET("/load", nil)
		dashboard.GET("/query", nil)
		dashboard.POST("/create", nil)
		dashboard.POST("/update", nil)
		dashboard.POST("/delete", nil)
	}

	// engine.Group()
	// Swagger UI
	engine.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))

	// 注册 Swagger UI 路由
	// docs.SwaggerInfo.BasePath = "/model"
	// v1 := engine.Group("/api/v1")
	// {
	// 	eg := v1.Group("/example")
	// 	{
	// 		eg.GET("/helloworld", Helloworld)
	// 	}
	// }

	// start route with 8080 port
	engine.Run(":8080")

	// Redis hashmap 母线模型、异步电动机模型

	// kv key name value busx
}