package controller

import (
	. "bindresume/config"
	"bindresume/service"
	"fmt"
	"github.com/google/uuid"
	"log"
	"net/http"
	"time"

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

// 页面1：扫码绑定页面
func ScanCodeHandler(c *gin.Context) {
	userUUID, err := c.Cookie("uuid")
	if err != nil || userUUID == "" {
		// 如果 Cookie 中没有 UUID，则生成新 uuid，过期时间 10 分钟
		userUUID = uuid.New().String()
		c.SetCookie("uuid", userUUID, 3000, "/", "", false, true)
		if err = InsertCookie(userUUID); err != nil {
			log.Println("cookie写入数据库错误:", err)
		}
	} else {
		var (
			id         int
			resumeId   string
			bindStatus int
		)
		//查询简历绑定状态，如果是1 跳转至简历详情页面，2 解绑状态，删除uuid，重新生成重新绑定
		row := Db.QueryRow("select id,resume_id,status from bindings where uuid = ? ", userUUID)
		if err = row.Scan(&id, &resumeId, &bindStatus); err != nil {
			log.Println("获取数据错误:", err)
		}
		if bindStatus == 2 { //解绑
			userUUID = uuid.New().String()
			c.SetCookie("uuid", userUUID, 3000, "/", "", false, true)
			if err = InsertCookie(userUUID); err != nil {
				log.Println("cookie写入数据库错误:", err)
			}
		}
	}

	// 渲染模板，模板文件位于 templates/page1.html，此处传递 UUID 参数
	c.HTML(http.StatusOK, "page1.html", gin.H{
		"UUID": userUUID,
	})
}

// SSE 接口，用于推送绑定状态
func EventsHandler(c *gin.Context) {
	userUUID := c.Query("uuid")
	log.Println("event get uuid", userUUID)
	if userUUID == "" {
		c.String(http.StatusBadRequest, "缺少 uuid 参数")
		return
	}

	// 设置 SSE 响应头
	c.Writer.Header().Set("Content-Type", "text/event-stream")
	c.Writer.Header().Set("Cache-Control", "no-cache")
	c.Writer.Header().Set("Connection", "keep-alive")
	c.Writer.Flush()

	ticker := time.NewTicker(1 * time.Second)
	timeout := time.After(30 * time.Minute)
	defer ticker.Stop()

	for {
		select {
		case <-ticker.C:
			_, resumeID, status, err := service.GetBindingByUUID(userUUID)
			if err != nil {
				continue
			}
			if status == 1 {
				data := fmt.Sprintf("{\"resume_id\":\"%s\"}", resumeID)
				fmt.Fprintf(c.Writer, "event: bind\ndata: %s\n\n", data)
				c.Writer.Flush()
				return
			}
		case <-timeout:
			return
		case <-c.Request.Context().Done():
			return
		}
	}
}

func InsertCookie(userUUID string) error {
	// 插入待绑定记录到数据库
	_, err := Db.Exec("INSERT INTO bindings(uuid, created_at) VALUES(?, ?)", userUUID, time.Now())
	if err != nil {
		return err
	}
	return nil
}