package statistics

import (
	"fmt"
	"time"
)

// ================ 命令对象 ================

// CreateMetricCommand 创建指标命令
type CreateMetricCommand struct {
	MetricType string    `json:"metric_type" validate:"required" comment:"指标类型"`
	MetricName string    `json:"metric_name" validate:"required" comment:"指标名称"`
	Dimension  string    `json:"dimension" comment:"统计维度"`
	Value      float64   `json:"value" validate:"min=0" comment:"指标值"`
	Metadata   string    `json:"metadata" comment:"额外维度信息"`
	Date       time.Time `json:"date" validate:"required" comment:"统计日期"`
}

// UpdateMetricCommand 更新指标命令
type UpdateMetricCommand struct {
	ID    string  `json:"id" validate:"required" comment:"指标ID"`
	Value float64 `json:"value" validate:"min=0" comment:"新指标值"`
}

// DeleteMetricCommand 删除指标命令
type DeleteMetricCommand struct {
	ID string `json:"id" validate:"required" comment:"指标ID"`
}

// GenerateReportCommand 生成报告命令
type GenerateReportCommand struct {
	ReportType string                 `json:"report_type" validate:"required" comment:"报告类型"`
	Title      string                 `json:"title" validate:"required" comment:"报告标题"`
	Period     string                 `json:"period" validate:"required" comment:"统计周期"`
	UserRole   string                 `json:"user_role" validate:"required" comment:"用户角色"`
	StartDate  time.Time             `json:"start_date" comment:"开始日期"`
	EndDate    time.Time             `json:"end_date" comment:"结束日期"`
	Filters    map[string]interface{} `json:"filters" comment:"过滤条件"`
	GeneratedBy string               `json:"generated_by" validate:"required" comment:"生成者ID"`
}

// CreateDashboardCommand 创建仪表板命令
type CreateDashboardCommand struct {
	Name            string `json:"name" validate:"required" comment:"仪表板名称"`
	Description     string `json:"description" comment:"仪表板描述"`
	UserRole        string `json:"user_role" validate:"required" comment:"用户角色"`
	Layout          string `json:"layout" comment:"布局配置"`
	Widgets         string `json:"widgets" comment:"组件配置"`
	Settings        string `json:"settings" comment:"设置配置"`
	RefreshInterval int    `json:"refresh_interval" validate:"min=30" comment:"刷新间隔(秒)"`
	AccessLevel     string `json:"access_level" comment:"访问级别"`
	CreatedBy       string `json:"created_by" validate:"required" comment:"创建者ID"`
}

// UpdateDashboardCommand 更新仪表板命令
type UpdateDashboardCommand struct {
	ID              string `json:"id" validate:"required" comment:"仪表板ID"`
	Name            string `json:"name" comment:"仪表板名称"`
	Description     string `json:"description" comment:"仪表板描述"`
	Layout          string `json:"layout" comment:"布局配置"`
	Widgets         string `json:"widgets" comment:"组件配置"`
	Settings        string `json:"settings" comment:"设置配置"`
	RefreshInterval int    `json:"refresh_interval" validate:"min=30" comment:"刷新间隔(秒)"`
	AccessLevel     string `json:"access_level" comment:"访问级别"`
	UpdatedBy       string `json:"updated_by" validate:"required" comment:"更新者ID"`
}

// SetDefaultDashboardCommand 设置默认仪表板命令
type SetDefaultDashboardCommand struct {
	DashboardID string `json:"dashboard_id" validate:"required" comment:"仪表板ID"`
	UserRole    string `json:"user_role" validate:"required" comment:"用户角色"`
	UpdatedBy   string `json:"updated_by" validate:"required" comment:"更新者ID"`
}

// ActivateDashboardCommand 激活仪表板命令
type ActivateDashboardCommand struct {
	DashboardID string `json:"dashboard_id" validate:"required" comment:"仪表板ID"`
	ActivatedBy string `json:"activated_by" validate:"required" comment:"激活者ID"`
}

// DeactivateDashboardCommand 停用仪表板命令
type DeactivateDashboardCommand struct {
	DashboardID   string `json:"dashboard_id" validate:"required" comment:"仪表板ID"`
	DeactivatedBy string `json:"deactivated_by" validate:"required" comment:"停用者ID"`
}

// DeleteDashboardCommand 删除仪表板命令
type DeleteDashboardCommand struct {
	DashboardID string `json:"dashboard_id" validate:"required" comment:"仪表板ID"`
	DeletedBy   string `json:"deleted_by" validate:"required" comment:"删除者ID"`
}

// ExportDataCommand 导出数据命令
type ExportDataCommand struct {
	Format      string                 `json:"format" validate:"required" comment:"导出格式"`
	MetricType string                 `json:"metric_type" validate:"required" comment:"指标类型"`
	StartDate  time.Time             `json:"start_date" validate:"required" comment:"开始日期"`
	EndDate    time.Time             `json:"end_date" validate:"required" comment:"结束日期"`
	Dimension  string                 `json:"dimension" comment:"统计维度"`
	GroupBy    string                 `json:"group_by" comment:"分组维度"`
	Filters    map[string]interface{} `json:"filters" comment:"过滤条件"`
	Columns    []string               `json:"columns" comment:"导出列"`
	IncludeCharts bool               `json:"include_charts" comment:"是否包含图表"`
	ExportedBy string                 `json:"exported_by" validate:"required" comment:"导出者ID"`
}

// TriggerAggregationCommand 触发数据聚合命令
type TriggerAggregationCommand struct {
	MetricType string    `json:"metric_type" validate:"required" comment:"指标类型"`
	Period     string    `json:"period" validate:"required" comment:"聚合周期"`
	StartDate  time.Time `json:"start_date" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" comment:"结束日期"`
	Force      bool      `json:"force" comment:"是否强制重新聚合"`
	TriggeredBy string   `json:"triggered_by" validate:"required" comment:"触发者ID"`
}

// Validate 验证触发聚合命令
func (c *TriggerAggregationCommand) Validate() error {
	if c.MetricType == "" {
		return fmt.Errorf("指标类型不能为空")
	}
	if c.Period == "" {
		return fmt.Errorf("聚合周期不能为空")
	}
	if c.TriggeredBy == "" {
		return fmt.Errorf("触发者ID不能为空")
	}
	// 验证周期类型
	validPeriods := []string{"hourly", "daily", "weekly", "monthly"}
	isValidPeriod := false
	for _, period := range validPeriods {
		if c.Period == period {
			isValidPeriod = true
			break
		}
	}
	if !isValidPeriod {
		return fmt.Errorf("不支持的聚合周期: %s", c.Period)
	}
	return nil
}

// ================ 查询对象 ================

// GetMetricsQuery 获取指标查询
type GetMetricsQuery struct {
	MetricType string    `json:"metric_type" form:"metric_type" comment:"指标类型"`
	MetricName string    `json:"metric_name" form:"metric_name" comment:"指标名称"`
	Dimension  string    `json:"dimension" form:"dimension" comment:"统计维度"`
	StartDate  time.Time `json:"start_date" form:"start_date" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" comment:"结束日期"`
	Limit      int       `json:"limit" form:"limit" comment:"限制数量"`
	Offset     int       `json:"offset" form:"offset" comment:"偏移量"`
	SortBy     string    `json:"sort_by" form:"sort_by" comment:"排序字段"`
	SortOrder  string    `json:"sort_order" form:"sort_order" comment:"排序顺序"`
}

// GetRealtimeMetricsQuery 获取实时指标查询
type GetRealtimeMetricsQuery struct {
	MetricType string `json:"metric_type" form:"metric_type" validate:"required" comment:"指标类型"`
	TimeRange  string `json:"time_range" form:"time_range" comment:"时间范围"`
	Dimension  string `json:"dimension" form:"dimension" comment:"统计维度"`
}

// GetHistoricalMetricsQuery 获取历史指标查询
type GetHistoricalMetricsQuery struct {
	MetricType string    `json:"metric_type" form:"metric_type" validate:"required" comment:"指标类型"`
	MetricName string    `json:"metric_name" form:"metric_name" comment:"指标名称"`
	Dimension  string    `json:"dimension" form:"dimension" comment:"统计维度"`
	StartDate  time.Time `json:"start_date" form:"start_date" validate:"required" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" validate:"required" comment:"结束日期"`
	Period     string    `json:"period" form:"period" comment:"统计周期"`
	Limit      int       `json:"limit" form:"limit" comment:"限制数量"`
	Offset     int       `json:"offset" form:"offset" comment:"偏移量"`
	AggregateBy string   `json:"aggregate_by" form:"aggregate_by" comment:"聚合维度"`
	GroupBy    string    `json:"group_by" form:"group_by" comment:"分组维度"`
}

// GetDashboardDataQuery 获取仪表板数据查询
type GetDashboardDataQuery struct {
	UserRole   string    `json:"user_role" form:"user_role" validate:"required" comment:"用户角色"`
	Period     string    `json:"period" form:"period" comment:"统计周期"`
	StartDate  time.Time `json:"start_date" form:"start_date" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" comment:"结束日期"`
	MetricTypes []string `json:"metric_types" form:"metric_types" comment:"指标类型列表"`
	Dimensions  []string `json:"dimensions" form:"dimensions" comment:"统计维度列表"`
}

// GetReportsQuery 获取报告查询
type GetReportsQuery struct {
	ReportType string    `json:"report_type" form:"report_type" comment:"报告类型"`
	UserRole   string    `json:"user_role" form:"user_role" comment:"用户角色"`
	Status     string    `json:"status" form:"status" comment:"报告状态"`
	Period     string    `json:"period" form:"period" comment:"统计周期"`
	StartDate  time.Time `json:"start_date" form:"start_date" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" comment:"结束日期"`
	Limit      int       `json:"limit" form:"limit" comment:"限制数量"`
	Offset     int       `json:"offset" form:"offset" comment:"偏移量"`
	SortBy     string    `json:"sort_by" form:"sort_by" comment:"排序字段"`
	SortOrder  string    `json:"sort_order" form:"sort_order" comment:"排序顺序"`
	GeneratedBy string   `json:"generated_by" form:"generated_by" comment:"生成者ID"`
}

// GetDashboardsQuery 获取仪表板查询
type GetDashboardsQuery struct {
	UserRole    string `json:"user_role" form:"user_role" comment:"用户角色"`
	IsDefault   *bool  `json:"is_default" form:"is_default" comment:"是否默认"`
	IsActive    *bool  `json:"is_active" form:"is_active" comment:"是否激活"`
	AccessLevel string `json:"access_level" form:"access_level" comment:"访问级别"`
	CreatedBy   string `json:"created_by" form:"created_by" comment:"创建者ID"`
	Name        string `json:"name" form:"name" comment:"仪表板名称"`
	Limit       int    `json:"limit" form:"limit" comment:"限制数量"`
	Offset      int    `json:"offset" form:"offset" comment:"偏移量"`
	SortBy      string `json:"sort_by" form:"sort_by" comment:"排序字段"`
	SortOrder   string `json:"sort_order" form:"sort_order" comment:"排序顺序"`
}

// GetReportQuery 获取单个报告查询
type GetReportQuery struct {
	ReportID string `json:"report_id" form:"report_id" validate:"required" comment:"报告ID"`
}

// GetDashboardQuery 获取单个仪表板查询
type GetDashboardQuery struct {
	DashboardID string `json:"dashboard_id" form:"dashboard_id" validate:"required" comment:"仪表板ID"`
}

// GetMetricQuery 获取单个指标查询
type GetMetricQuery struct {
	MetricID string `json:"metric_id" form:"metric_id" validate:"required" comment:"指标ID"`
}

// CalculateGrowthRateQuery 计算增长率查询
type CalculateGrowthRateQuery struct {
	MetricType      string    `json:"metric_type" form:"metric_type" validate:"required" comment:"指标类型"`
	MetricName      string    `json:"metric_name" form:"metric_name" validate:"required" comment:"指标名称"`
	CurrentPeriod   time.Time `json:"current_period" form:"current_period" validate:"required" comment:"当前周期"`
	PreviousPeriod  time.Time `json:"previous_period" form:"previous_period" validate:"required" comment:"上一周期"`
}

// CalculateTrendQuery 计算趋势查询
type CalculateTrendQuery struct {
	MetricType string    `json:"metric_type" form:"metric_type" validate:"required" comment:"指标类型"`
	MetricName string    `json:"metric_name" form:"metric_name" validate:"required" comment:"指标名称"`
	StartDate  time.Time `json:"start_date" form:"start_date" validate:"required" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" validate:"required" comment:"结束日期"`
}

// CalculateCorrelationQuery 计算相关性查询
type CalculateCorrelationQuery struct {
	MetricType1 string    `json:"metric_type1" form:"metric_type1" validate:"required" comment:"指标类型1"`
	MetricName1 string    `json:"metric_name1" form:"metric_name1" validate:"required" comment:"指标名称1"`
	MetricType2 string    `json:"metric_type2" form:"metric_type2" validate:"required" comment:"指标类型2"`
	MetricName2 string    `json:"metric_name2" form:"metric_name2" validate:"required" comment:"指标名称2"`
	StartDate   time.Time `json:"start_date" form:"start_date" validate:"required" comment:"开始日期"`
	EndDate     time.Time `json:"end_date" form:"end_date" validate:"required" comment:"结束日期"`
}

// CalculateMovingAverageQuery 计算移动平均查询
type CalculateMovingAverageQuery struct {
	MetricType string    `json:"metric_type" form:"metric_type" validate:"required" comment:"指标类型"`
	MetricName string    `json:"metric_name" form:"metric_name" validate:"required" comment:"指标名称"`
	StartDate  time.Time `json:"start_date" form:"start_date" validate:"required" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" validate:"required" comment:"结束日期"`
	WindowSize int       `json:"window_size" form:"window_size" validate:"min=1" comment:"窗口大小"`
}

// CalculateSeasonalityQuery 计算季节性查询
type CalculateSeasonalityQuery struct {
	MetricType string    `json:"metric_type" form:"metric_type" validate:"required" comment:"指标类型"`
	MetricName string    `json:"metric_name" form:"metric_name" validate:"required" comment:"指标名称"`
	StartDate  time.Time `json:"start_date" form:"start_date" validate:"required" comment:"开始日期"`
	EndDate    time.Time `json:"end_date" form:"end_date" validate:"required" comment:"结束日期"`
}

// ================ 响应对象 ================

// CommandResponse 命令响应
type CommandResponse struct {
	Success bool                   `json:"success" comment:"是否成功"`
	Message string                 `json:"message" comment:"响应消息"`
	Data    interface{}            `json:"data" comment:"响应数据"`
	Error   string                 `json:"error,omitempty" comment:"错误信息"`
}

// QueryResponse 查询响应
type QueryResponse struct {
	Success bool                   `json:"success" comment:"是否成功"`
	Message string                 `json:"message" comment:"响应消息"`
	Data    interface{}            `json:"data" comment:"响应数据"`
	Meta    map[string]interface{} `json:"meta" comment:"元数据"`
	Error   string                 `json:"error,omitempty" comment:"错误信息"`
}

// ListResponse 列表响应
type ListResponse struct {
	Success    bool                   `json:"success" comment:"是否成功"`
	Message    string                 `json:"message" comment:"响应消息"`
	Data       ListDataDTO            `json:"data" comment:"数据列表"`
	Meta       map[string]interface{} `json:"meta" comment:"元数据"`
	Error      string                 `json:"error,omitempty" comment:"错误信息"`
}

// ListDataDTO 列表数据DTO
type ListDataDTO struct {
	Total int64         `json:"total" comment:"总数"`
	Page  int           `json:"page" comment:"页码"`
	Size  int           `json:"size" comment:"每页数量"`
	Items []interface{} `json:"items" comment:"数据列表"`
}

// ================ 验证方法 ================

// Validate 验证创建指标命令
func (c *CreateMetricCommand) Validate() error {
	if c.MetricType == "" {
		return fmt.Errorf("指标类型不能为空")
	}
	if c.MetricName == "" {
		return fmt.Errorf("指标名称不能为空")
	}
	if c.Value < 0 {
		return fmt.Errorf("指标值不能为负数")
	}
	if c.Date.IsZero() {
		return fmt.Errorf("统计日期不能为空")
	}
	return nil
}

// Validate 验证更新指标命令
func (c *UpdateMetricCommand) Validate() error {
	if c.ID == "" {
		return fmt.Errorf("指标ID不能为空")
	}
	if c.Value < 0 {
		return fmt.Errorf("指标值不能为负数")
	}
	return nil
}

// Validate 验证生成报告命令
func (c *GenerateReportCommand) Validate() error {
	if c.ReportType == "" {
		return fmt.Errorf("报告类型不能为空")
	}
	if c.Title == "" {
		return fmt.Errorf("报告标题不能为空")
	}
	if c.Period == "" {
		return fmt.Errorf("统计周期不能为空")
	}
	if c.UserRole == "" {
		return fmt.Errorf("用户角色不能为空")
	}
	if c.GeneratedBy == "" {
		return fmt.Errorf("生成者ID不能为空")
	}
	return nil
}

// Validate 验证创建仪表板命令
func (c *CreateDashboardCommand) Validate() error {
	if c.Name == "" {
		return fmt.Errorf("仪表板名称不能为空")
	}
	if c.UserRole == "" {
		return fmt.Errorf("用户角色不能为空")
	}
	if c.CreatedBy == "" {
		return fmt.Errorf("创建者ID不能为空")
	}
	if c.RefreshInterval < 30 {
		return fmt.Errorf("刷新间隔不能少于30秒")
	}
	return nil
}

// Validate 验证更新仪表板命令
func (c *UpdateDashboardCommand) Validate() error {
	if c.ID == "" {
		return fmt.Errorf("仪表板ID不能为空")
	}
	if c.UpdatedBy == "" {
		return fmt.Errorf("更新者ID不能为空")
	}
	if c.RefreshInterval < 30 {
		return fmt.Errorf("刷新间隔不能少于30秒")
	}
	return nil
}

// Validate 验证导出数据命令
func (c *ExportDataCommand) Validate() error {
	if c.Format == "" {
		return fmt.Errorf("导出格式不能为空")
	}
	if c.MetricType == "" {
		return fmt.Errorf("指标类型不能为空")
	}
	if c.StartDate.IsZero() || c.EndDate.IsZero() {
		return fmt.Errorf("开始日期和结束日期不能为空")
	}
	if c.StartDate.After(c.EndDate) {
		return fmt.Errorf("开始日期不能晚于结束日期")
	}
	if c.ExportedBy == "" {
		return fmt.Errorf("导出者ID不能为空")
	}
	return nil
}