package service

import (
	"seeyon-filesystem/config"
	"seeyon-filesystem/dto"
	"seeyon-filesystem/model"
)

// LogService 日志服务
type LogService struct{}

func NewLogService() *LogService {
	return &LogService{}
}

// Record 记录操作日志
func (s *LogService) Record(userID uint64, username, action, resource, detail, ip, ua string, status int) {
	log := &model.OperationLog{
		UserID:    userID,
		Username:  username,
		Action:    action,
		Resource:  resource,
		Detail:    detail,
		IP:        ip,
		UserAgent: ua,
		Status:    status,
	}
	config.DB.Create(log)
}

// List 查询日志列表
func (s *LogService) List(page, size int, action, resource, keyword string, userID uint64) ([]dto.OperationLogVO, int64, error) {
	query := config.DB.Model(&model.OperationLog{})

	if action != "" {
		query = query.Where("action = ?", action)
	}
	if resource != "" {
		query = query.Where("resource = ?", resource)
	}
	if userID > 0 {
		query = query.Where("user_id = ?", userID)
	}
	if keyword != "" {
		query = query.Where("detail LIKE ? OR username LIKE ? OR ip LIKE ?",
			"%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%")
	}

	var total int64
	query.Count(&total)

	var logs []model.OperationLog
	query.Order("created_at DESC").Offset((page - 1) * size).Limit(size).Find(&logs)

	vos := make([]dto.OperationLogVO, 0, len(logs))
	for _, l := range logs {
		vos = append(vos, dto.OperationLogVO{
			ID:        l.ID,
			UserID:    l.UserID,
			Username:  l.Username,
			Action:    l.Action,
			Resource:  l.Resource,
			Detail:    l.Detail,
			IP:        l.IP,
			Status:    l.Status,
			CreatedAt: l.CreatedAt.Format("2006-01-02 15:04:05"),
		})
	}

	return vos, total, nil
}

// GetStats 获取日志统计
func (s *LogService) GetStats() (map[string]interface{}, error) {
	var total int64
	var today int64
	var failed int64

	config.DB.Model(&model.OperationLog{}).Count(&total)
	config.DB.Model(&model.OperationLog{}).Where("DATE(created_at) = CURDATE()").Count(&today)
	config.DB.Model(&model.OperationLog{}).Where("status = 0").Count(&failed)

	// 按操作类型统计
	type ActionCount struct {
		Action string `json:"action"`
		Count  int64  `json:"count"`
	}
	var actionCounts []ActionCount
	config.DB.Model(&model.OperationLog{}).
		Select("action, COUNT(*) as count").
		Group("action").
		Order("count DESC").
		Limit(10).
		Find(&actionCounts)

	return map[string]interface{}{
		"total":         total,
		"today":         today,
		"failed":        failed,
		"action_counts": actionCounts,
	}, nil
}

// CleanOld 清理N天前的日志
func (s *LogService) CleanOld(days int) (int64, error) {
	result := config.DB.Where("created_at < DATE_SUB(NOW(), INTERVAL ? DAY)", days).Delete(&model.OperationLog{})
	return result.RowsAffected, result.Error
}