package logger

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"path"
	"runtime/debug"
	"strconv"
	"strings"
	"time"
)

type Log struct {
	lastDate string
	loglist  []string
}

//默认日志等级。error(<3)|info(4)|debug(5)
var LogLevel = "5"

//日志文件保留最近的份数
var KeepCount = 7
var Logger = new(Log)

func (c *Log) Init() {
	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
	logfilename := time.Now().Format("20060102") + ".log"
	logFile, err := os.OpenFile("./"+logfilename, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
	if err != nil {
		log.Panic("创建日志文件异常")
		os.Exit(1)
	}
	log.SetOutput(logFile)
	c.lastDate = time.Now().Format("2006-01-02")
	c.loglist = append(c.loglist, logfilename)
	//清除过期日志文件
	go c.clearLogfile()
}

func (c *Log) Println(obj interface{}) {
	fmt.Println(fmt.Sprintf("%s：%+v", time.Now().Format("2006-01-02 15:04:05"), obj))
	log.Println(fmt.Sprintf("%s：%+v", time.Now().Format("2006-01-02 15:04:05"), obj))
}

func (c *Log) Error(obj interface{}, info ...string) {
	c.makeLogFile()
	log.Println(fmt.Sprintf(" %s：%+v\n---Strace:%s", "ERROR", obj, string(debug.Stack())))
	if len(info) > 0 {
		log.Println(info)
	}
}
func (c *Log) DebugStack(obj interface{}) {
	if LogLevel >= "5" {
		c.makeLogFile()
		log.Println(fmt.Sprintf(" %s：%+v\n---Strace:%s", "Debug", obj, string(debug.Stack())))
	}
}

func (c *Log) InfoStack(obj interface{}) {
	if LogLevel >= "4" {
		c.makeLogFile()
		log.Println(fmt.Sprintf(" %s：%+v\n---Strace:%s", "Info", obj, string(debug.Stack())))
	}
}
func (c *Log) Debug(obj interface{}) {
	if LogLevel >= "5" {
		c.makeLogFile()
		sorce := strings.Split(string(debug.Stack()), "\n")[6:7][0]
		log.Println(fmt.Sprintf(" %s：%+v \n\t\t\t\t\t\t\t\tsource:%s", "Debug", obj, sorce))
	}
}

func (c *Log) Info(obj interface{}) {
	if LogLevel >= "4" {
		c.makeLogFile()
		sorce := strings.Split(string(debug.Stack()), "\n")[6:7][0]
		log.Println(fmt.Sprintf(" %s：%+v \n\t\t\t\t\t\t\t\tsource:%s", "Info", obj, sorce))
	}
}

func (c *Log) makeLogFile() {
	nowdate := time.Now().Format("2006-01-02")
	if c.lastDate != nowdate {
		c.Init()
	}
}

func (c *Log) clearLogfile() {
	dir, _ := os.Getwd()
	files, _ := ioutil.ReadDir(dir)
	nowday := time.Now().AddDate(0, 0, -1*KeepCount).Format("20060102")
	nowdayInt, _ := strconv.Atoi(nowday)
	for _, file := range files {
		if path.Ext(strings.ToLower(file.Name())) == ".log" {
			fileFlag := file.ModTime().Format("20060102")
			fileFlagInt, _ := strconv.Atoi(fileFlag)
			if fileFlagInt > 0 && fileFlagInt < nowdayInt {
				os.Remove("./" + file.Name())
			}
		}
	}
}