package cmd

import (
	"fmt"
	"log"
	"net/http"
	"os"
	"otpm/database"
	"otpm/handlers"
	"otpm/utils"

	"github.com/jmoiron/sqlx"
	"github.com/julienschmidt/httprouter"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var rootCmd = &cobra.Command{
	Use:   "otpm",
	Short: "otp backend for microapp on wechat",
	Run: func(cmd *cobra.Command, args []string) {
		startApp()
	},
}

func Execute() {
	if err := rootCmd.Execute(); err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
}

func init() {
	cobra.OnInitialize(initConfig)

	rootCmd.PersistentFlags().StringP("config", "c", "", "config file (default is $HOME/config.yaml)")
	rootCmd.PersistentFlags().StringP("driver", "d", "sqlite3", "database driver (sqlite3, postgres, mysql)")
	rootCmd.PersistentFlags().StringP("dsn", "s", "", "database connection string")
	rootCmd.PersistentFlags().StringP("port", "p", "8080", "port to listen on")

	viper.BindPFlag("database.driver", rootCmd.PersistentFlags().Lookup("driver"))
	viper.BindPFlag("database.dsn", rootCmd.PersistentFlags().Lookup("dsn"))
	viper.BindPFlag("port", rootCmd.PersistentFlags().Lookup("port"))
}

func initConfig() {
	if cfgFile := viper.GetString("config"); cfgFile != "" {
		viper.SetConfigFile(cfgFile)
	} else {
		viper.AddConfigPath(".")
		viper.SetConfigName("config")
		viper.SetConfigType("yaml")
	}

	if err := viper.ReadInConfig(); err != nil {
		log.Fatalf("Error reading config file: %v", err)
	}
}

func initApp(db *sqlx.DB) {
	if err := database.MigrateDB(db); err != nil {
		log.Fatalf("Error migrating the database: %v", err)
	}
}

func startApp() {
	port := viper.GetInt("port")
	db, err := database.InitDB()
	if err != nil {
		log.Fatalf("Error connecting to the database: %v", err)
	}
	defer db.Close()
	initApp(db)
	handler := &handlers.Handler{DB: db}

	router := httprouter.New()
	router.POST("/login", utils.AdaptHandler(handler.Login))
	router.POST("/set", utils.AdaptHandler(handler.UpdateOrCreateOtp))
	router.GET("/get", utils.AdaptHandler(handler.GetOtp))

	log.Println("Starting server on :8080")
	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), router))
}