package main

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
	_ "github.com/go-sql-driver/mysql"
)

var StoreStreamer *sql.DB
var SqlQuery string = `SELECT
ie.uid,
ie.platform,
ie.user_id,
ie.user_name ,
ie.live_url ,
ie.tags ,
cl.followers ,
cl.views ,
cl.gratuity ,
cl.live_title,
cl.live_start_time ,
cl.live_end_time ,
cl.update_time
From
(
SELECT
	*
FROM
	intimate_extractor.streamer
WHERE
	platform = "twitcasting"
	AND operator = 0
	AND latest_log_uid is not NULL limit %s,%s) ie
JOIN intimate_extractor.collect_log cl
WHERE
ie.latest_log_uid = cl.log_uid; `

func init() {
	db, err := sql.Open("mysql", InitConfig.Database.ExtractorURI)
	if err != nil {
		panic(err)
	}
	StoreStreamer = db
}

// ie.uid,
// ie.platform,
// ie.user_id,
// ie.user_name ,
// ie.live_url ,
// ie.tags ,
// cl.followers ,
// cl.views ,
// cl.gratuity ,
// cl.live_title,
// cl.live_start_time ,
// cl.live_end_time ,
// cl.update_time

type ObjectTwistcasting struct {
	Uid           int64
	Platform      string
	UserId        string
	UserName      string
	LiveUrl       string
	Tags          []string
	Followers     int64
	Views         int64
	Gratuity      int64
	LiveTitle     string
	LiveStartTime *time.Time
	LiveEndTime   *time.Time
	UpdateTime    *time.Time
}

type Result struct {
	Code  int
	Error string
	Data  interface{}
}

func TwitcastingQuery(cxt *gin.Context) {
	var err error
	page, err := strconv.Atoi(cxt.Query("page"))
	if err != nil {
		cxt.Error(err)
	}
	psize, err := strconv.Atoi(cxt.Query("psize"))
	if err != nil {
		cxt.Error(err)
	}
	if psize > 100 {
		cxt.Error(fmt.Errorf("page size <= 100"))
	}

	start := (page - 1) * 200
	// end := start + 200

	ssql := fmt.Sprintf(SqlQuery, strconv.Itoa(start), strconv.Itoa(psize))
	rows, err := StoreStreamer.Query(ssql)
	if err != nil {
		cxt.Error(err)
	}
	var ots []*ObjectTwistcasting
	for rows.Next() {
		ot := &ObjectTwistcasting{}
		var lstm, letm, utm sql.NullTime
		var tags string
		err = rows.Scan(
			&ot.Uid,
			&ot.Platform,
			&ot.UserId,
			&ot.UserName,
			&ot.LiveUrl,
			&tags,
			&ot.Followers,
			&ot.Views,
			&ot.Gratuity,
			&ot.LiveTitle,
			&lstm,
			&letm,
			&utm,
		)
		if err != nil {
			cxt.Error(err)
			return
		}
		if !lstm.Valid {
			ot.LiveStartTime = nil
		} else {
			ot.LiveStartTime = &lstm.Time
		}
		if !letm.Valid {
			ot.LiveEndTime = nil
		} else {
			ot.LiveEndTime = &letm.Time
		}
		if !utm.Valid {
			ot.UpdateTime = nil
		} else {
			ot.UpdateTime = &utm.Time
		}

		if err = json.Unmarshal([]byte(tags), &ot.Tags); err != nil {
			log.Println(tags)
		}

		ots = append(ots, ot)
	}

	r := &Result{Code: 200}
	r.Data = ots
	log.Println(len(ots))
	if retdata, err := json.Marshal(r); err != nil {
		cxt.Error(err)
	} else {
		cxt.JSON(r.Code, string(retdata))
	}
}

func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		method := c.Request.Method               //请求方法
		origin := c.Request.Header.Get("Origin") //请求头部
		var headerKeys []string                  // 声明请求头keys
		for k, _ := range c.Request.Header {
			headerKeys = append(headerKeys, k)
		}
		headerStr := strings.Join(headerKeys, ", ")
		if headerStr != "" {
			headerStr = fmt.Sprintf("access-control-allow-origin, access-control-allow-headers, %s", headerStr)
		} else {
			headerStr = "access-control-allow-origin, access-control-allow-headers"
		}
		if origin != "" {
			c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
			c.Header("Access-Control-Allow-Origin", "*")                                       // 这是允许访问所有域
			c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE,UPDATE") //服务器支持的所有跨域请求的方法,为了避免浏览次请求的多次'预检'请求
			//  header的类型
			c.Header("Access-Control-Allow-Headers", "Authorization, Content-Length, X-CSRF-Token, Token,session,X_Requested_With,Accept, Origin, Host, Connection, Accept-Encoding, Accept-Language,DNT, X-CustomHeader, Keep-Alive, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type, Pragma")
			//              允许跨域设置                                                                                                      可以返回其他子段
			c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers,Cache-Control,Content-Language,Content-Type,Expires,Last-Modified,Pragma,FooBar") // 跨域关键设置 让浏览器可以解析
			c.Header("Access-Control-Max-Age", "172800")                                                                                                                                                           // 缓存请求信息 单位为秒
			c.Header("Access-Control-Allow-Credentials", "false")                                                                                                                                                  //  跨域请求是否需要带cookie信息 默认设置为true
			c.Set("content-type", "application/json")                                                                                                                                                              // 设置返回格式是json
		}

		//放行所有OPTIONS方法
		if method == "OPTIONS" {
			c.JSON(http.StatusOK, "Options Request!")
		}
		// 处理请求
		c.Next() //  处理请求
	}
}

func main() {
	engine := gin.New() //r := gin.Default() //使用默认中间件
	engine.Use(gin.Logger())
	engine.Use(Cors())
	engine.GET("twitcasting/query", TwitcastingQuery)
	engine.Run(":5500")
}