package cmd

import (
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var cfgFile string

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:   "bottin-agenda",
	Short: "Application de gestion de distribution d'agendas",
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	err := rootCmd.Execute()
	if err != nil {
		os.Exit(1)
	}
}

func init() {
	cobra.OnInitialize(initConfig)

	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.bottin-agenda.yaml)")

	// web.api.host
	rootCmd.PersistentFlags().String("web-api-host", "api", "Remote API server host")
	if err := viper.BindPFlag("web.api.host", rootCmd.PersistentFlags().Lookup("web-api-host")); err != nil {
		log.Fatal(err)
	}

	// web.api.key
	rootCmd.PersistentFlags().String("web-api-key", "bottin-agenda", "Remote API server key")
	if err := viper.BindPFlag("web.api.key", rootCmd.PersistentFlags().Lookup("web-api-key")); err != nil {
		log.Fatal(err)
	}

	// web.api.protocol
	rootCmd.PersistentFlags().String("web-api-protocol", "http", "Remote API server protocol")
	if err := viper.BindPFlag("web.api.protocol", rootCmd.PersistentFlags().Lookup("web-api-protocol")); err != nil {
		log.Fatal(err)
	}

	// web.api.port
	rootCmd.PersistentFlags().Int("web-api-port", 1313, "Remote API server port")
	if err := viper.BindPFlag("web.api.port", rootCmd.PersistentFlags().Lookup("web-api-port")); err != nil {
		log.Fatal(err)
	}

	// web.password
	rootCmd.PersistentFlags().String("web-password", "bottin-agenda", "Web client password")
	if err := viper.BindPFlag("web.password", rootCmd.PersistentFlags().Lookup("web-password")); err != nil {
		log.Fatal(err)
	}

	// web.port
	rootCmd.PersistentFlags().Int("web-port", 2313, "Web client port")
	if err := viper.BindPFlag("web.port", rootCmd.PersistentFlags().Lookup("web-port")); err != nil {
		log.Fatal(err)
	}

	// web.user
	rootCmd.PersistentFlags().String("web-user", "bottin-agenda", "Web client user")
	if err := viper.BindPFlag("web.user", rootCmd.PersistentFlags().Lookup("web-user")); err != nil {
		log.Fatal(err)
	}

	// api.key
	rootCmd.PersistentFlags().String("api-key", "bottin-agenda", "API server key. Leave empty for no key auth.")
	if err := viper.BindPFlag("api.key", rootCmd.PersistentFlags().Lookup("api-key")); err != nil {
		log.Fatal(err)
	}

	// api.port
	rootCmd.PersistentFlags().Int("api-port", 1313, "API server port")
	if err := viper.BindPFlag("api.port", rootCmd.PersistentFlags().Lookup("api-port")); err != nil {
		log.Fatal(err)
	}

	// bottin.api.host
	rootCmd.PersistentFlags().String("bottin-api-host", "api", "Remote bottin API server host")
	if err := viper.BindPFlag("bottin.api.host", rootCmd.PersistentFlags().Lookup("bottin-api-host")); err != nil {
		log.Fatal(err)
	}

	// bottin.api.key
	rootCmd.PersistentFlags().String("bottin-api-key", "bottin", "Remote bottin API server key")
	if err := viper.BindPFlag("bottin.api.key", rootCmd.PersistentFlags().Lookup("bottin-api-key")); err != nil {
		log.Fatal(err)
	}

	// bottin.api.protocol
	rootCmd.PersistentFlags().String("bottin-api-protocol", "http", "Remote bottin API server protocol")
	if err := viper.BindPFlag("bottin.api.protocol", rootCmd.PersistentFlags().Lookup("bottin-api-protocol")); err != nil {
		log.Fatal(err)
	}

	// bottin.api.port
	rootCmd.PersistentFlags().Int("bottin-api-port", 1312, "Remote bottin API server port")
	if err := viper.BindPFlag("bottin.api.port", rootCmd.PersistentFlags().Lookup("bottin-api-port")); err != nil {
		log.Fatal(err)
	}

	// db.database
	rootCmd.PersistentFlags().String("db-database", "bottin-agenda", "Postgres database")
	if err := viper.BindPFlag("db.database", rootCmd.PersistentFlags().Lookup("db-database")); err != nil {
		log.Fatal(err)
	}

	// db.host
	rootCmd.PersistentFlags().String("db-host", "db", "Postgres host")
	if err := viper.BindPFlag("db.host", rootCmd.PersistentFlags().Lookup("db-host")); err != nil {
		log.Fatal(err)
	}

	// db.password
	rootCmd.PersistentFlags().String("db-password", "bottin-agenda", "Postgres password")
	if err := viper.BindPFlag("db.password", rootCmd.PersistentFlags().Lookup("db-password")); err != nil {
		log.Fatal(err)
	}

	// db.port
	rootCmd.PersistentFlags().Int("db-port", 5432, "Postgres port")
	if err := viper.BindPFlag("db.port", rootCmd.PersistentFlags().Lookup("db-port")); err != nil {
		log.Fatal(err)
	}

	// db.user
	rootCmd.PersistentFlags().String("db-user", "bottin-agenda", "Postgres user")
	if err := viper.BindPFlag("db.user", rootCmd.PersistentFlags().Lookup("db-user")); err != nil {
		log.Fatal(err)
	}
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
	if cfgFile != "" {
		// Use config file from the flag.
		viper.SetConfigFile(cfgFile)
	} else {
		// Find home directory.
		home, err := os.UserHomeDir()
		cobra.CheckErr(err)

		// Search config in home directory with name ".bottin-agenda" (without extension).
		viper.AddConfigPath(home)
		viper.SetConfigType("yaml")
		viper.SetConfigName(".bottin-agenda")
	}

	viper.SetEnvPrefix("BOTTINAGENDA")
	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
	viper.AutomaticEnv() // read in environment variables that match

	// If a config file is found, read it in.
	if err := viper.ReadInConfig(); err == nil {
		fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
	}
}