package models

import (
	"database/sql/driver"
	"encoding/json"
	"time"
)

// 操作类型常量
const (
	OperationTypeBalanceAdjustment = "balance_adjustment" // 余额调整
	OperationTypeUserLevelChange   = "user_level_change"  // 用户等级修改
	OperationTypeUserStatusChange  = "user_status_change" // 用户状态变更
	OperationTypeModelPriceChange  = "model_price_change" // 模型价格修改
	OperationTypePermissionChange  = "permission_change"  // 权限变更
	OperationTypeConfigChange      = "config_change"      // 配置修改
)

// 操作状态常量
const (
	AuditLogStatusSuccess = "success" // 成功
	AuditLogStatusFailed  = "failed"  // 失败
)

// 操作对象类型常量
const (
	TargetTypeUser   = "user"   // 用户
	TargetTypeModel  = "model"  // 模型
	TargetTypeConfig = "config" // 配置
)

// OperationDetails 操作详情JSON结构
type OperationDetails map[string]interface{}

// Value 实现 driver.Valuer 接口
func (d OperationDetails) Value() (driver.Value, error) {
	if d == nil {
		return nil, nil
	}
	return json.Marshal(d)
}

// Scan 实现 sql.Scanner 接口
func (d *OperationDetails) Scan(value interface{}) error {
	if value == nil {
		*d = nil
		return nil
	}
	bytes, ok := value.([]byte)
	if !ok {
		return nil
	}
	return json.Unmarshal(bytes, d)
}

// AuditLog 审计日志模型
type AuditLog struct {
	ID               uint             `json:"id" gorm:"primaryKey;autoIncrement;comment:主键ID"`
	OperationType    string           `json:"operation_type" gorm:"type:varchar(50);not null;index:idx_operation_type_time;comment:操作类型"`
	OperationTime    time.Time        `json:"operation_time" gorm:"not null;index:idx_operation_type_time;index:idx_operation_time;comment:操作时间"`
	OperatorID       int              `json:"operator_id" gorm:"not null;index:idx_operator_time;comment:操作人ID"`
	OperatorEmail    string           `json:"operator_email" gorm:"type:varchar(255);not null;index:idx_operator_email;comment:操作人邮箱"`
	TargetType       string           `json:"target_type" gorm:"type:varchar(50);comment:操作对象类型"`
	TargetID         *int             `json:"target_id" gorm:"comment:操作对象ID"`
	TargetEmail      string           `json:"target_email" gorm:"type:varchar(255);index:idx_target_email;comment:操作对象邮箱"`
	OperationDetails OperationDetails `json:"operation_details" gorm:"type:json;comment:操作详情JSON"`
	IPAddress        string           `json:"ip_address" gorm:"type:varchar(45);comment:操作来源IP地址"`
	UserAgent        string           `json:"user_agent" gorm:"type:varchar(500);comment:用户代理"`
	Status           string           `json:"status" gorm:"type:varchar(20);default:'success';comment:操作状态"`
	ErrorMessage     string           `json:"error_message" gorm:"type:text;comment:错误信息"`
	CreatedAt        time.Time        `json:"created_at" gorm:"not null;comment:记录创建时间"`
	UpdatedAt        time.Time        `json:"updated_at" gorm:"not null;comment:记录更新时间"`
}

// TableName 指定数据库表名
func (AuditLog) TableName() string {
	return "admin_audit_logs"
}

// AuditLogListRequest 审计日志列表请求
type AuditLogListRequest struct {
	OperationType string `form:"operation_type"`  // 操作类型筛选
	OperatorEmail string `form:"operator_email"`  // 操作人筛选
	TargetEmail   string `form:"target_email"`    // 操作对象搜索（模糊匹配）
	StartTime     string `form:"start_time"`      // 开始时间
	EndTime       string `form:"end_time"`        // 结束时间
	Page          int    `form:"page,default=1"`  // 页码
	Size          int    `form:"size,default=20"` // 每页数量
	SortBy        string `form:"sort_by"`         // 排序字段，默认：operation_time
	SortOrder     string `form:"sort_order"`      // 排序方向，desc/asc，默认：desc
}

// AuditLogListResponse 审计日志列表响应
type AuditLogListResponse struct {
	List  []AuditLog `json:"list"`
	Total int64      `json:"total"`
	Page  int        `json:"page"`
	Size  int        `json:"size"`
}

// CreateAuditLogRequest 创建审计日志请求（内部使用）
type CreateAuditLogRequest struct {
	OperationType    string           `json:"operation_type" binding:"required"`
	OperatorID       int              `json:"operator_id" binding:"required"`
	OperatorEmail    string           `json:"operator_email" binding:"required"`
	TargetType       string           `json:"target_type"`
	TargetID         *int             `json:"target_id"`
	TargetEmail      string           `json:"target_email"`
	OperationDetails OperationDetails `json:"operation_details"`
	IPAddress        string           `json:"ip_address"`
	UserAgent        string           `json:"user_agent"`
	Status           string           `json:"status"`
	ErrorMessage     string           `json:"error_message"`
}