package config

import (
	"fmt"
	"github.com/go-yaml/yaml"
	"io/ioutil"
	"os"
)

var AppConfig *AppConfiguration

type DbConf struct {
	DefaultMasterDsn  string `yaml:"defaultMasterDsn"`
	DefaultMasterIdle int    `yaml:"defaultMasterIdle"`
	DefaultMasterOpen int    `yaml:"defaultMasterOpen"`
	DefaultSlaveDsn   string `yaml:"defaultSlaveDsn"`
	DefaultSlaveIdle  int    `yaml:"defaultSlaveIdle"`
	DefaultSlaveOpen  int    `yaml:"defaultSlaveOpen"`
}
type LogDetail struct {
	Level      string `yaml:"level"`
	File       string `yaml:"file"`
	BackupNum  int    `yaml:"backup_num"`
	MaxSize    int    `yaml:"max_size"`
	RetainDays int    `yaml:"retain_days"`
}
type LogConf struct {
	Default    LogDetail `yaml:"default"`
	Trace      LogDetail `yaml:"trace"`
	BackupNum  int       `yaml:"backup_num"`
	MaxSize    int       `yaml:"max_size"`
	RetainDays int       `yaml:"retain_days"`
}

type KvDbConf struct {
	KvMasterDsn  string `yaml:"kvMasterDsn"`
	KvMasterIdle int    `yaml:"kvMasterIdle"`
	KvMasterOpen int    `yaml:"kvMasterOpen"`
	KvSlaveDsn   string `yaml:"kvSlaveDsn"`
	KvSlaveIdle  int    `yaml:"kvSlaveIdle"`
	KvSlaveOpen  int    `yaml:"kvSlaveOpen"`
}

type AppConfiguration struct {
	// app名称
	AppName string `yaml:"appName"`
	// listen addr
	Listen   string   `yaml:"listen"`
	LogConf  LogConf  `yaml:"log"`
	DbConf   DbConf   `yaml:"db"`
	KvDbConf KvDbConf `yaml:"kvdb"`
}

// FileExists检查某个文件路径是否存在
func FileExists(filename string) bool {
	if filename == "" {
		return false
	}
	if _, err := os.Stat(filename); os.IsNotExist(err) {
		return false
	}
	return true
}
func ParseConfig(file string) *AppConfiguration {
	if !FileExists(file) {
		// 正常启动
		panic("app配置文件不存在 filename:" + file)
	}
	c := &AppConfiguration{}
	b, err := ioutil.ReadFile(file)
	if err != nil {
		panic(fmt.Sprintf("读取app配置文件失败 filename:%s err:%s", file, err))
	}
	err = yaml.Unmarshal(b, c)
	if err != nil || c.AppName == "" {
		panic(fmt.Sprintf("解析app配置文件失败 filename:%s err:%s content:%s", file, err, string(b)))
	}
	AppConfig = c
	return c
}