/*
macli - Unofficial CLI-Based MyAnimeList Client
Copyright © 2022 Vidhu Kant Sharma <vidhukant@vidhukant.xyz>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package cmd

import (
	"os"
  "fmt"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"github.com/MikunoNaka/macli/auth"
)

var loginCmd = &cobra.Command {
	Use:   "login",
	Short: "Login with your MyAnimeList account",
	Long: "To authenticate with macli, a Client ID is required.\n" +
	"If you have logged in before and ran `macli logout`, you may not need to enter your Client ID again unless you specifically deleted it.\n" +
	"\n" +
	"\x1b[31;1mHow to generate a Client ID:\x1b[0m\n" +
	" - Go to \x1b[36mhttps://myanimelist.net/apiconfig\x1b[0m\n" +
	" - Click on \x1b[33m\"Create ID\"\x1b[0m\n" +
	" - Inside the form you can set all the details to whatever you'd like\n" +
	" - For macli to work properly, you only need to set \x1b[33m\"App Redirect Url\"\x1b[0m to \x1b[36mhttp://localhost:8000\x1b[0m\n" +
	" - After that, hit submit, then copy your Client ID, run `macli login` and paste in your Client ID.\n" +
	" - \x1b[31mIf after running `macli login` it opens a dialogue box in the browser asking for credentials,\n   and not the MyAnimeList login page, that means you have entered your Client ID wrong.\x1b[0m\n" +
	"",
	Run: func(cmd *cobra.Command, args []string) {
		var storeClientId bool

		var err error
        if cmd.Flags().Lookup("no-sys-keyring").Changed {
            auth.NoSysKeyring, err = cmd.Flags().GetBool("no-sys-keyring")
            if err != nil {
				fmt.Println("Error reading \x1b[33m`--no-sys-keyring`\x1b[0m flag:", err.Error())
			}
        } else {
            auth.NoSysKeyring = viper.GetBool("auth.no_system_keyring")
        }

		var s, errmsg string
        if cmd.Flags().Lookup("store-client-id").Changed {
		    s, _ = cmd.Flags().GetString("store-client-id")
			errmsg = "\x1b[33m`--store-client-id`\x1b[0m flag only accepts \x1b[33m\"yes\"\x1b[0m or \x1b[33m\"no\"\x1b[0m"
		} else {
			s = viper.GetString("auth.save_client_id")
			errmsg = fmt.Sprintf("%s: \x1b[33m`auth.save_client_id`\x1b[0m option only accepts \x1b[33m\"yes\"\x1b[0m or \x1b[33m\"no\"\x1b[0m", viper.ConfigFileUsed())
		}
		switch s {
		case "yes", "":
			storeClientId = true
		case "no":
			storeClientId = false
		default:
			fmt.Println(errmsg)
			os.Exit(1)
		}

		if auth.NoSysKeyring {
			viper.WriteConfigAs(viper.ConfigFileUsed())
		}

		tk, _ := cmd.Flags().GetString("authentication-token")
		clientId, _ := cmd.Flags().GetString("client-id")

		auth.Login(tk, clientId, storeClientId)
	},
}

func init() {
    rootCmd.AddCommand(loginCmd)
    loginCmd.Flags().StringP("authentication-token", "t", "", "MyAnimeList authentication token to use (overrides system keyring if any)")
    loginCmd.Flags().StringP("client-id", "c", "", "MyAnimeList Client ID")
    loginCmd.Flags().StringP("store-client-id", "s", "yes", "Save Client ID to keyring")
    loginCmd.Flags().BoolP("no-sys-keyring", "k", false, "Don't use system keyring to store login info")
}