package serve

import (
	"database/sql"
	"log"
	"net/http"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	httpSwagger "github.com/swaggo/http-swagger"
	"github.com/uptrace/bun"
	"github.com/uptrace/bun/dialect/sqlitedialect"
	"github.com/uptrace/bun/driver/sqliteshim"
	"github.com/uptrace/bun/extra/bunotel"
	"github.com/uptrace/bunrouter"
	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
	"go.uber.org/zap"

	_ "gitea.konchin.com/ytshih/inp2025/game/backend/docs"
	"gitea.konchin.com/ytshih/inp2025/game/backend/handlers/api"
	"gitea.konchin.com/ytshih/inp2025/game/backend/handlers/auth"
	"gitea.konchin.com/ytshih/inp2025/game/backend/middlewares"
	"gitea.konchin.com/ytshih/inp2025/game/implements"
	"gitea.konchin.com/ytshih/inp2025/game/tracing"
	"gitea.konchin.com/ytshih/inp2025/game/utils"
)

// @title			Intro. to Network Programming Game
// @version		0.0.1-alpha
// @license.name	0BSD
// @BasePath		/
var backendCmd = &cobra.Command{
	Use:   "backend",
	Short: "Game backend",
	Run: func(cmd *cobra.Command, args []string) {
		ctx := cmd.Context()
		tracing.InitTracer("game backend")

		tracing.Logger.Ctx(ctx).
			Debug("connect to sql",
				zap.String("sql.url",
					"file:"+viper.GetString("sqlite-file")+"?cache=shared&mode=rwc"))
		sqldb, err := sql.Open(sqliteshim.ShimName,
			"file:"+viper.GetString("sqlite-file")+"?cache=shared&mode=rwc")
		if err != nil {
			tracing.Logger.Ctx(ctx).
				Panic("failed to init sqlite",
					zap.Error(err))
			panic(err)
		}
		bunDB := bun.NewDB(sqldb, sqlitedialect.New())
		bunDB.AddQueryHook(bunotel.NewQueryHook(bunotel.WithDBName("sqlite")))
		if err := utils.InitDB(ctx, bunDB); err != nil {
			tracing.Logger.Ctx(ctx).
				Panic("failed to init db schema",
					zap.Error(err))
			panic(err)
		}

		db := implements.NewBunDatabase(bunDB)
		authHandlers := auth.NewHandlers(db)
		apiHandlers := api.NewHandlers(db)
		middlewareHandlers := middlewares.NewHandlers(db)

		router := bunrouter.New()

		if viper.GetBool("swagger") {
			router.GET("/swagger/*any",
				bunrouter.HTTPHandlerFunc(
					httpSwagger.Handler()))
		}

		backend := router.NewGroup("").
			Use(middlewareHandlers.ErrorHandler).
			Use(middlewareHandlers.BunrouterOtel).
			Use(middlewareHandlers.AccessLog)

		authGroup := backend.NewGroup("/auth")
		authGroup.GET("/login",
			middlewareHandlers.Auth(
				authHandlers.GetLogin))
		authGroup.POST("/logout",
			middlewareHandlers.Auth(
				authHandlers.PostLogout))
		authGroup.POST("/register",
			authHandlers.PostRegister)

		apiGroup := backend.NewGroup("/api").
			Use(middlewareHandlers.Auth)
		apiGroup.GET("/lobby/users",
			apiHandlers.GetLobbyUsers)

		tracing.Logger.Ctx(ctx).
			Info("http server up",
				zap.String("http.port", viper.GetString("port")))

		log.Println(http.ListenAndServe(":"+viper.GetString("port"),
			otelhttp.NewHandler(router, "")))
	},
}

func init() {
	backendCmd.Flags().
		String("port", "8080", "Port to listen on")
	backendCmd.Flags().
		Bool("swagger", false, "Enable swagger")
	backendCmd.Flags().
		String("sqlite-file", ":memory:", "File for sqlite")
}