package responses

import (
	"time"

	"tyapi-server/internal/domains/certification/entities/value_objects"
	"tyapi-server/internal/domains/certification/enums"
)

// CertificationResponse 认证响应
type CertificationResponse struct {
	ID         string                    `json:"id"`
	UserID     string                    `json:"user_id"`
	Status     enums.CertificationStatus `json:"status"`
	StatusName string                    `json:"status_name"`
	Progress   int                       `json:"progress"`

	// 企业信息
	EnterpriseInfo *value_objects.EnterpriseInfo `json:"enterprise_info,omitempty"`

	// 合同信息
	ContractInfo *value_objects.ContractInfo `json:"contract_info,omitempty"`

	// 时间戳
	CreatedAt            time.Time  `json:"created_at"`
	UpdatedAt            time.Time  `json:"updated_at"`
	InfoSubmittedAt      *time.Time `json:"info_submitted_at,omitempty"`
	EnterpriseVerifiedAt *time.Time `json:"enterprise_verified_at,omitempty"`
	ContractAppliedAt    *time.Time `json:"contract_applied_at,omitempty"`
	ContractSignedAt     *time.Time `json:"contract_signed_at,omitempty"`
	CompletedAt          *time.Time `json:"completed_at,omitempty"`

	// 业务状态
	IsCompleted          bool `json:"is_completed"`
	IsFailed             bool `json:"is_failed"`
	IsUserActionRequired bool `json:"is_user_action_required"`

	// 失败信息
	FailureReason     enums.FailureReason `json:"failure_reason,omitempty"`
	FailureReasonName string              `json:"failure_reason_name,omitempty"`
	FailureMessage    string              `json:"failure_message,omitempty"`
	CanRetry          bool                `json:"can_retry,omitempty"`
	RetryCount        int                 `json:"retry_count,omitempty"`

	// 用户操作提示
	NextAction       string   `json:"next_action,omitempty"`
	AvailableActions []string `json:"available_actions,omitempty"`

	// 元数据
	Metadata map[string]interface{} `json:"metadata,omitempty"`
}

// ConfirmAuthResponse 确认认证状态响应
type ConfirmAuthResponse struct {
	Status enums.CertificationStatus `json:"status"`
	Reason string `json:"reason"`
}

// ConfirmSignResponse 确认签署状态响应
type ConfirmSignResponse struct {
	Status enums.CertificationStatus `json:"status"`
	Reason string `json:"reason"`
}

// CertificationListResponse 认证列表响应
type CertificationListResponse struct {
	Items      []*CertificationResponse `json:"items"`
	Total      int64                    `json:"total"`
	Page       int                      `json:"page"`
	PageSize   int                      `json:"page_size"`
	TotalPages int                      `json:"total_pages"`
}

// ContractSignUrlResponse 合同签署URL响应
type ContractSignUrlResponse struct {
	CertificationID string     `json:"certification_id"`
	ContractSignURL string     `json:"contract_sign_url"`
	ContractURL     string     `json:"contract_url,omitempty"`
	ExpireAt        *time.Time `json:"expire_at,omitempty"`
	NextAction      string     `json:"next_action"`
	Message         string     `json:"message"`
}


// SystemMonitoringResponse 系统监控响应
type SystemMonitoringResponse struct {
	TimeRange     string                 `json:"time_range"`
	Metrics       map[string]interface{} `json:"metrics"`
	Alerts        []SystemAlert          `json:"alerts,omitempty"`
	SystemHealth  SystemHealthStatus     `json:"system_health"`
	LastUpdatedAt time.Time              `json:"last_updated_at"`
}

// SystemAlert 系统警告
type SystemAlert struct {
	Level     string                 `json:"level"`     // info, warning, error, critical
	Type      string                 `json:"type"`      // 警告类型
	Message   string                 `json:"message"`   // 警告消息
	Metric    string                 `json:"metric"`    // 相关指标
	Value     interface{}            `json:"value"`     // 当前值
	Threshold interface{}            `json:"threshold"` // 阈值
	CreatedAt time.Time              `json:"created_at"`
	Metadata  map[string]interface{} `json:"metadata,omitempty"`
}

// SystemHealthStatus 系统健康状态
type SystemHealthStatus struct {
	Overall    string                 `json:"overall"`    // healthy, warning, critical
	Components map[string]string      `json:"components"` // 各组件状态
	LastCheck  time.Time              `json:"last_check"`
	Details    map[string]interface{} `json:"details,omitempty"`
}

// ================ 响应构建辅助方法 ================

// NewCertificationListResponse 创建认证列表响应
func NewCertificationListResponse(items []*CertificationResponse, total int64, page, pageSize int) *CertificationListResponse {
	totalPages := int((total + int64(pageSize) - 1) / int64(pageSize))
	if totalPages == 0 {
		totalPages = 1
	}

	return &CertificationListResponse{
		Items:      items,
		Total:      total,
		Page:       page,
		PageSize:   pageSize,
		TotalPages: totalPages,
	}
}

// NewContractSignUrlResponse 创建合同签署URL响应
func NewContractSignUrlResponse(certificationID, signURL, contractURL, nextAction, message string) *ContractSignUrlResponse {
	response := &ContractSignUrlResponse{
		CertificationID: certificationID,
		ContractSignURL: signURL,
		ContractURL:     contractURL,
		NextAction:      nextAction,
		Message:         message,
	}

	// 设置过期时间（默认24小时）
	expireAt := time.Now().Add(24 * time.Hour)
	response.ExpireAt = &expireAt

	return response
}


// NewSystemAlert 创建系统警告
func NewSystemAlert(level, alertType, message, metric string, value, threshold interface{}) *SystemAlert {
	return &SystemAlert{
		Level:     level,
		Type:      alertType,
		Message:   message,
		Metric:    metric,
		Value:     value,
		Threshold: threshold,
		CreatedAt: time.Now(),
		Metadata:  make(map[string]interface{}),
	}
}


// IsHealthy 检查系统是否健康
func (r *SystemMonitoringResponse) IsHealthy() bool {
	return r.SystemHealth.Overall == "healthy"
}

// GetCriticalAlerts 获取严重警告
func (r *SystemMonitoringResponse) GetCriticalAlerts() []*SystemAlert {
	var criticalAlerts []*SystemAlert
	for i := range r.Alerts {
		if r.Alerts[i].Level == "critical" {
			criticalAlerts = append(criticalAlerts, &r.Alerts[i])
		}
	}
	return criticalAlerts
}

// HasAlerts 检查是否有警告
func (r *SystemMonitoringResponse) HasAlerts() bool {
	return len(r.Alerts) > 0
}

// GetMetricValue 获取指标值
func (r *SystemMonitoringResponse) GetMetricValue(metric string) (interface{}, bool) {
	value, exists := r.Metrics[metric]
	return value, exists
}