package main

import (
	"database/sql"
	"fmt"

	. "bindresume/config"
	"net/http"
	"strconv"
	"strings"
	"time"

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

// 后台简历搜索页，前端页面拆分到 templates/admin_search.html
func adminSearchPageHandler(c *gin.Context) {
	c.HTML(http.StatusOK, "admin_search.html", nil)
}

// 后台绑定操作：为待绑定人员绑定简历
func adminBindHandler(c *gin.Context) {
	resumeID := strings.TrimSpace(c.PostForm("resume_id"))
	if resumeID == "" {
		resumeID = c.Query("resume_id")
	}
	if resumeID == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "简历ID不能为空"})
		return
	}

	// 查找最早的一条待绑定记录
	row := Db.QueryRow("SELECT id, uuid FROM bindings WHERE status = 0 ORDER BY created_at ASC LIMIT 1")
	var id int
	var waitingUUID string
	err := row.Scan(&id, &waitingUUID)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"message": "没有待绑定的人员"})
		return
	}

	now := time.Now()
	_, err = Db.Exec("UPDATE bindings SET resume_id = ?, status = ?, bound_at = ?, operator = ? WHERE id = ?",
		resumeID, 1, now, "admin", id)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "绑定失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": fmt.Sprintf("成功绑定 uuid: %s 与简历ID: %s", waitingUUID, resumeID)})
}

// 后台绑定列表页：显示所有绑定记录
// 后台绑定列表页：显示所有绑定记录（分页查询）
func adminListHandler(c *gin.Context) {
	// 获取页码参数
	pageStr := c.DefaultQuery("page", "1")
	page, err := strconv.Atoi(pageStr)
	if err != nil || page < 1 {
		page = 1
	}
	pageSize := 10
	offset := (page - 1) * pageSize

	// 查询总记录数
	var totalCount int
	row := Db.QueryRow("SELECT COUNT(*) FROM bindings")
	if err := row.Scan(&totalCount); err != nil {
		c.String(http.StatusInternalServerError, "查询记录总数失败")
		return
	}

	// 查询当前页的记录
	rows, err := Db.Query("SELECT id, uuid, resume_id, status, created_at, bound_at, operator FROM bindings ORDER BY id DESC LIMIT ? OFFSET ?", pageSize, offset)
	if err != nil {
		c.String(http.StatusInternalServerError, "查询失败")
		return
	}
	defer rows.Close()

	var bindings []map[string]interface{}
	for rows.Next() {
		var id, status int
		var uuidVal, resumeID, operator string
		var createdAt, boundAt sql.NullTime
		if err := rows.Scan(&id, &uuidVal, &resumeID, &status, &createdAt, &boundAt, &operator); err != nil {
			continue
		}
		b := map[string]interface{}{
			"ID":       id,
			"UUID":     uuidVal,
			"ResumeID": resumeID,
			"Status":   status,
			"Operator": operator,
		}
		if createdAt.Valid {
			b["CreatedAt"] = createdAt.Time.Format("2006-01-02 15:04:05")
		} else {
			b["CreatedAt"] = ""
		}
		if boundAt.Valid {
			b["BoundAt"] = boundAt.Time.Format("2006-01-02 15:04:05")
		} else {
			b["BoundAt"] = ""
		}
		bindings = append(bindings, b)
	}

	// 计算总页数
	totalPage := (totalCount + pageSize - 1) / pageSize

	// 渲染模板，传递分页信息
	c.HTML(http.StatusOK, "admin_list.html", gin.H{
		"Bindings":  bindings,
		"CurrPage":  page,
		"TotalPage": totalPage,
	})
}

// 后台解绑操作，删除绑定记录
func adminUnbindHandler(c *gin.Context) {
	idStr := c.PostForm("id")
	resume_id := c.PostForm("resume_id")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID错误"})
		return
	}
	_, err = Db.Exec("UPDATE bindings SET status = 2 WHERE id = ? and resume_id = ? ", id, resume_id)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "解绑失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "解绑成功"})
}