// Copyright (c) 2015 qianqiusoft.com
// Licensed to You under the GNU Affero GPL v3
// See the LICENSE file at git.qianqiusoft.com/qianqiusoft/light-vocation/LICENSE
// http://www.gnu.org/licenses/why-affero-gpl.en.html

// config.go
package utils

import (
	"errors"
	"fmt"
	"os"
	"strconv"
	"strings"

	"github.com/astaxie/beego"
)

type ConfigHelper struct {
}

func NewConfig() *ConfigHelper {
	return &ConfigHelper{}
}

// get string value of the config by the key
// the value is from env or app.conf
func (this *ConfigHelper) String(key string) string {
	key = strings.TrimSpace(key)
	if key == "" {
		beego.Error("ConfigHelper.String : param key is empty")
		return ""
	}
	val := os.Getenv(key)
	val = strings.TrimSpace(val)
	if val == "" {
		val = beego.AppConfig.String(key)
		val = strings.TrimSpace(val)
	}

	return val
}

// get int value of config by key
// the value is from env or app.conf
// param key : key
// param defaultValue : default value
func (this *ConfigHelper) Int64(key string, defaultValue int64) (int64, error) {
	key = strings.TrimSpace(key)
	if key == "" {
		beego.Error("ConfigHelper.Int64 : param key is empty")
		return 0, errors.New("param ke is empty")
	}
	val := os.Getenv(key)
	val = strings.TrimSpace(val)
	if val == "" {
		val = beego.AppConfig.String(key)
		val = strings.TrimSpace(val)
		beego.Debug(fmt.Sprintf("ConfigHelper.Int64 value of key %s is %s from app.conf", key, val))
	} else {
		beego.Debug(fmt.Sprintf("ConfigHelper.Int64 value of key %s is %s from env", key, val))
	}

	if val == "" {
		beego.Debug("ConfigHelper.Bool return default value ")
		return defaultValue, nil
	}

	return strconv.ParseInt(val, 10, 64)
}

// get bool value of config by key
// the value is from env or app.conf
// param key : key
// param defaultValue : default value
func (this *ConfigHelper) Bool(key string, defaultValue bool) (bool, error) {
	key = strings.TrimSpace(key)
	if key == "" {
		beego.Error("ConfigHelper.Bool : param key is empty")
		return false, errors.New("param ke is empty")
	}

	val := os.Getenv(key)
	val = strings.TrimSpace(val)
	if val == "" {
		val = beego.AppConfig.String(key)
		val = strings.TrimSpace(val)
		beego.Debug(fmt.Sprintf("ConfigHelper.Bool value of key %s is %s from app.conf", key, val))
	} else {
		beego.Debug(fmt.Sprintf("ConfigHelper.Bool value of key %s is %s from env", key, val))
	}

	if val == "" {
		beego.Debug("ConfigHelper.Bool return default value ")
		return defaultValue, nil
	}

	return strconv.ParseBool(val)
}

// get the string value from env
// param key : key
// return : it will be "" if there is not key
func (this *ConfigHelper) StringEnv(key string) string {
	key = strings.TrimSpace(key)
	if key == "" {
		beego.Error("utConfigHelperils.StringEnv : param key is empty")
		return ""
	}
	val := os.Getenv(key)
	val = strings.TrimSpace(val)

	return val
}

// get the int64 value from env
// param key : key
// return : value and error
func (this *ConfigHelper) Int64Env(key string) (int64, error) {
	key = strings.TrimSpace(key)
	if key == "" {
		beego.Error("ConfigHelper.Int64Env : param key is empty")
		return 0, errors.New("param ke is empty")
	}
	val := os.Getenv(key)
	val = strings.TrimSpace(val)

	if val == "" {
		beego.Debug("ConfigHelper.Bool return default value ")
		return 0, errors.New("value of key is not exists")
	}

	return strconv.ParseInt(val, 10, 64)
}

// get bool value of config by key from env
// param key : key
// return : value and error
func (this *ConfigHelper) BoolEnv(key string, defaultValue bool) (bool, error) {
	key = strings.TrimSpace(key)
	if key == "" {
		beego.Error("ConfigHelper.Bool : param key is empty")
		return false, errors.New("param ke is empty")
	}

	val := os.Getenv(key)
	val = strings.TrimSpace(val)

	if val == "" {
		beego.Debug("ConfigHelper.Bool return default value ")
		return false, errors.New("value of key is not exists")
	}

	return strconv.ParseBool(val)
}