package middleware

import (
	"bytes"
	"gofaster/internal/shared/model"
	"io"
	"strconv"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
	"gorm.io/gorm"
)

// 从 Gin 上下文中获取用户ID（假设 JWT 中间件已将用户信息存入上下文）
func getUserIdFromContext(c *gin.Context) uint {
	// 使用安全的GetUserID函数
	if userID, exists := GetUserID(c); exists {
		return userID
	}
	return 0 // 0 表示未登录用户或获取失败
}

// 从请求路径解析操作类型（根据 RESTful 路径映射）
func getActionFromPath(path string) string {
	// 移除查询参数和版本前缀（如 /api/v1/users -> /users）
	cleanPath := strings.Split(path, "?")[0]
	segments := strings.Split(cleanPath, "/")
	lastSegment := segments[len(segments)-1]

	// 常见 RESTful 操作映射
	switch lastSegment {
	case "login":
		return "用户登录"
	case "logout":
		return "用户登出"
	case "users":
		return "用户管理"
	case "roles":
		return "角色管理"
	case "permissions":
		return "权限管理"
	default:
		// 如果是数字ID（如 /users/123），取上一级路径
		if _, err := strconv.Atoi(lastSegment); err == nil && len(segments) > 1 {
			return getActionFromPath(strings.Join(segments[:len(segments)-1], "/"))
		}
		return "未知操作"
	}
}

func LoggerMiddleware(logger *zap.Logger, db *gorm.DB) gin.HandlerFunc {
	return func(c *gin.Context) {
		start := time.Now()
		path := c.Request.URL.Path

		// 记录请求体
		var requestBody string
		if c.Request.Body != nil {
			bodyBytes, _ := io.ReadAll(c.Request.Body)
			c.Request.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
			requestBody = string(bodyBytes)
		}

		// 处理请求
		c.Next()

		// 记录日志
		latency := time.Since(start).Milliseconds()
		actionLog := model.ActionLog{
			UserID:    getUserIdFromContext(c),
			Action:    getActionFromPath(path),
			IP:        c.ClientIP(),
			UserAgent: c.Request.UserAgent(),
			Path:      path,
			Method:    c.Request.Method,
			Request:   requestBody,
			Status:    c.Writer.Status(),
			Latency:   latency,
		}

		// 异步保存日志
		go func() {
			if err := db.Create(&actionLog).Error; err != nil {
				logger.Error("保存操作日志失败", zap.Error(err))
			}
		}()
	}
}