package logic

import (
	"net/http"
	"country/db"
	"time"
	"github.com/google/uuid"
	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
)

// DeleteRequest 删除请求参数结构
type DeleteRequest struct {
	CountryID string `json:"country_id" binding:"required"` // 国家ID，必填
}

// DeleteResponse 删除响应结构
type DeleteResponse struct {
	Success bool   `json:"success"` // 操作是否成功
	Message string `json:"message"` // 提示信息
}

// DeleteHandler 处理国家删除逻辑（软删除）
func DeleteHandler(c *gin.Context) {
	startTime := time.Now()
	reqID := c.Request.Header.Get("X-DeleteRequest-ID")
	if reqID == "" {
		reqID = uuid.New().String()
		zap.L().Debug("✨ 生成新的请求ID", zap.String("req_id", reqID))
	}

	zap.L().Info("📥 收到国家删除请求",
		zap.String("req_id", reqID),
		zap.String("path", c.Request.URL.Path),
		zap.String("method", c.Request.Method),
	)

	var req DeleteRequest
	// 绑定并验证请求参数
	if err := c.ShouldBindJSON(&req); err != nil {
		zap.L().Warn("⚠️ 请求参数验证失败",
			zap.String("req_id", reqID),
			zap.Error(err),
		)
		c.JSON(http.StatusBadRequest, DeleteResponse{
			Success: false,
			Message: "请求参数错误：country_id为必填项",
		})
		return
	}

	zap.L().Debug("✅ 请求参数验证通过",
		zap.String("req_id", reqID),
		zap.String("country_id", req.CountryID),
	)

	// 开启数据库事务
	tx, err := db.DB.Begin()
	if err != nil {
		zap.L().Error("❌ 事务开启失败",
			zap.String("req_id", reqID),
			zap.Error(err),
		)
		c.JSON(http.StatusInternalServerError, DeleteResponse{
			Success: false,
			Message: "系统错误，请稍后重试",
		})
		return
	}

	// 延迟处理panic情况
	defer func() {
		if r := recover(); r != nil {
			if err := tx.Rollback(); err != nil {
				zap.L().Error("💥 panic后事务回滚失败",
					zap.String("req_id", reqID),
					zap.Error(err),
				)
			}
			zap.L().Error("💥 事务处理发生panic",
				zap.String("req_id", reqID),
				zap.Any("recover", r),
			)
			c.JSON(http.StatusInternalServerError, DeleteResponse{
				Success: false,
				Message: "系统错误，请稍后重试",
			})
		}
	}()

	// 3.1 更新country表
	_, err = tx.Exec("UPDATE country SET deleted = TRUE WHERE id = $1", req.CountryID)
	if err != nil {
		tx.Rollback()
		zap.L().Error("❌ country表更新失败",
			zap.String("req_id", reqID),
			zap.String("country_id", req.CountryID),
			zap.Error(err),
		)
		c.JSON(http.StatusInternalServerError, DeleteResponse{
			Success: false,
			Message: "删除国家记录失败",
		})
		return
	}

	// 3.2 更新name表
	_, err = tx.Exec("UPDATE name SET deleted = TRUE WHERE country_id = $1", req.CountryID)
	if err != nil {
		tx.Rollback()
		zap.L().Error("❌ name表更新失败",
			zap.String("req_id", reqID),
			zap.String("country_id", req.CountryID),
			zap.Error(err),
		)
		c.JSON(http.StatusInternalServerError, DeleteResponse{
			Success: false,
			Message: "删除名称信息失败",
		})
		return
	}

	// 3.3 更新code表
	_, err = tx.Exec("UPDATE code SET deleted = TRUE WHERE country_id = $1", req.CountryID)
	if err != nil {
		tx.Rollback()
		zap.L().Error("❌ code表更新失败",
			zap.String("req_id", reqID),
			zap.String("country_id", req.CountryID),
			zap.Error(err),
		)
		c.JSON(http.StatusInternalServerError, DeleteResponse{
			Success: false,
			Message: "删除代码信息失败",
		})
		return
	}

	// 提交事务
	if err := tx.Commit(); err != nil {
		tx.Rollback()
		zap.L().Error("❌ 事务提交失败",
			zap.String("req_id", reqID),
			zap.String("country_id", req.CountryID),
			zap.Error(err),
		)
		c.JSON(http.StatusInternalServerError, DeleteResponse{
			Success: false,
			Message: "数据提交失败，请稍后重试",
		})
		return
	}

	// 记录请求处理耗时
	duration := time.Since(startTime)
	zap.L().Info("✅ 国家删除请求处理完成",
		zap.String("req_id", reqID),
		zap.String("country_id", req.CountryID),
		zap.Duration("duration", duration),
	)

	// 返回成功响应
	c.JSON(http.StatusOK, DeleteResponse{
		Success: true,
		Message: "删除成功",
	})
}