// staletea
// Copyright (C) 2019 Jonas Franz
//
// 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 config

import (
	"gitea.com/jonasfranz/staletea/utils"
	"github.com/spf13/viper"
	"os"
)

// Key represents a config key
type Key string

// Get the value of the key from config
func (k Key) Get() interface{} {
	return viper.Get(string(k))
}

// Set the value of the key to config
func (k Key) Set(value interface{}) {
	viper.Set(string(k), value)
}

func (k Key) setDefault(defaultValue interface{}) {
	viper.SetDefault(string(k), defaultValue)
}

// This block contains all config keys
const (
	GiteaURL       Key = "gitea_url"
	BotAccessToken Key = "gitea_bot_access_token"

	SessionSecret  Key = "session_secret"
	DatabaseDriver Key = "database_driver"
	DatabaseURI    Key = "database_uri"

	RepositoryScanInterval Key = "repository_scan_interval"
	IssueScanInterval      Key = "issue_scan_interval"

	RepositoryConfigFileName Key = "repository_config_file_name"
)

// SetupConfig fills all default values, reads the config and/or writes the default config.
func SetupConfig() error {
	GiteaURL.setDefault("https://gitea.com")
	BotAccessToken.setDefault("YOUR_BOT_TOKEN")

	secret, err := utils.NewSecret(32)
	if err != nil {
		return err
	}
	SessionSecret.setDefault(secret)
	DatabaseDriver.setDefault("sqlite3")
	DatabaseURI.setDefault("staletea.db")

	RepositoryScanInterval.setDefault("@every 30s")
	IssueScanInterval.setDefault("@every 2m")

	RepositoryConfigFileName.setDefault(".stale.yml")

	viper.SetConfigName("config")
	viper.SetConfigType("yml")
	viper.AutomaticEnv()
	viper.AddConfigPath(".")
	if err := viper.SafeWriteConfigAs("config.yml"); err != nil {
		if os.IsNotExist(err) {
			if err := viper.WriteConfigAs("config.yml"); err != nil {
				return err
			}
		}
	}
	return viper.ReadInConfig()
}