package cmd

import (
	"crypto/subtle"
	"fmt"
	"log"

	"git.agecem.com/agecem/bottin/v4/data"
	"git.agecem.com/agecem/bottin/v4/handlers"
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var (
	apiPort int
	apiKey  string
)

// apiCmd represents the api command
var apiCmd = &cobra.Command{
	Use:   "api",
	Short: "Démarrer le serveur API",
	Args:  cobra.ExactArgs(0),
	Run: func(cmd *cobra.Command, args []string) {
		apiKey = viper.GetString("api.key")
		apiPort = viper.GetInt("api.port")

		connection := data.PostgresConnection{
			User:     viper.GetString("db.user"),
			Password: viper.GetString("db.password"),
			Host:     viper.GetString("db.host"),
			Database: viper.GetString("db.database"),
			Port:     viper.GetInt("db.port"),
		}

		e := echo.New()

		// Middlewares

		e.Pre(middleware.AddTrailingSlash())

		if apiKey != "" {
			e.Use(middleware.KeyAuth(func(key string, c echo.Context) (bool, error) {
				return subtle.ConstantTimeCompare([]byte(key), []byte(apiKey)) == 1, nil
			}))
		}

		// Routes

		e.GET("/v4/", handlers.GetV4)

		e.POST("/v4/membres/", handlers.PostMembres)

		e.GET("/v4/membres/:membre_id/", handlers.ReadMembre)

		e.PUT("/v4/membres/:membre_id/prefered_name/", handlers.PutMembrePreferedName)

		e.POST("/v4/programmes/", handlers.PostProgrammes)

		e.POST("/v4/seed/", handlers.PostSeed)

		// Execution

		client, err := data.NewDataClient(connection)
		if err != nil {
			log.Fatalf("Could not establish database connection.\n	Error: %s\n", err)
		}

		err = client.DB.Ping()
		if err != nil {
			log.Fatalf("Database was supposed to be ready but Ping() failed.\n  Error: %s\n", err)
		}

		client.DB.Close()

		e.Logger.Fatal(e.Start(fmt.Sprintf(":%d", apiPort)))
	},
}

func init() {
	rootCmd.AddCommand(apiCmd)

	// api.key
	apiCmd.Flags().String(
		"api-key", "bottin",
		"API server key. Leave empty for no key auth. (config: 'api.key')")
	viper.BindPFlag("api.key", apiCmd.Flags().Lookup("api-key"))

	// api.port
	apiCmd.Flags().Int(
		"api-port", 1312,
		"API server port (config:'api.port')")
	viper.BindPFlag("api.port", apiCmd.Flags().Lookup("api-port"))

	// db.database
	apiCmd.Flags().String("db-database", "bottin", "Postgres database (config:'db.database')")
	viper.BindPFlag("db.database", apiCmd.Flags().Lookup("db-database"))

	// db.host
	apiCmd.Flags().String("db-host", "db", "Postgres host (config:'db.host')")
	viper.BindPFlag("db.host", apiCmd.Flags().Lookup("db-host"))

	// db.password
	apiCmd.Flags().String("db-password", "bottin", "Postgres password (config:'db.password')")
	viper.BindPFlag("db.password", apiCmd.Flags().Lookup("db-password"))

	// db.port
	apiCmd.Flags().Int("db-port", 5432, "Postgres port (config:'db.port')")
	viper.BindPFlag("db.port", apiCmd.Flags().Lookup("db-port"))

	// db.user
	apiCmd.Flags().String("db-user", "bottin", "Postgres user (config:'db.user')")
	viper.BindPFlag("db.user", apiCmd.Flags().Lookup("db-user"))
}