package model

import (
	"time"

	"gorm.io/datatypes"
)

// DirectUploadStatus constants for the staged upload process.
type DirectUploadStatus string

const (
	DirectUploadStatusPending  DirectUploadStatus = "pending"  // File uploaded, awaiting attachment
	DirectUploadStatusCompleted DirectUploadStatus = "completed" // File attached/processed
	DirectUploadStatusExpired  DirectUploadStatus = "expired"   // Upload expired
)

// DirectUploadSource constants for the upload source.
type DirectUploadSource string

const (
	DirectUploadSourceAccount DirectUploadSource = "account" // Account-level upload (dashboard agent)
	DirectUploadSourceWidget  DirectUploadSource = "widget"  // Widget direct upload (visitor)
)

// DirectUpload stores metadata about a file uploaded through account API or widget direct upload.
// Reference: Chatwoot api/v1/accounts/:account_id/upload + /widget/direct_uploads
// Account uploads: agent attaches file to conversation from dashboard
// Widget direct uploads: visitor uploads file directly (staged flow similar to WidgetFileUpload)
type DirectUpload struct {
	Base
	UploadUUID string            `gorm:"size:36;uniqueIndex;not null" json:"upload_uuid"`           // UUID for public-facing tracking
	AccountID  uint              `gorm:"index;not null" json:"account_id"`                          // Account this upload belongs to
	Status     DirectUploadStatus `gorm:"size:20;default:'pending';index" json:"status"`             // "pending", "completed", "expired"
	Source     DirectUploadSource `gorm:"size:20;not null;index" json:"source"`                      // "account" or "widget"

	// === File metadata ===
	OriginalName string         `gorm:"size:255;not null" json:"original_name"`                    // Original filename from user
	FileType     string         `gorm:"size:50;not null" json:"file_type"`                          // Category: "image", "audio", "video", "file"
	MimeType     string         `gorm:"size:100" json:"mime_type,omitempty"`                        // Full MIME type (e.g. "image/png")
	FileSize     int64          `gorm:"not null" json:"file_size"`                                  // File size in bytes
	FileURL      string         `gorm:"size:512" json:"file_url,omitempty"`                         // URL where file is stored
	ThumbURL     string         `gorm:"size:512" json:"thumb_url,omitempty"`                        // Thumbnail URL (for images)

	// === Processing ===
	Metadata  datatypes.JSON `gorm:"type:jsonb" json:"metadata,omitempty"`                      // Additional metadata (checksums, etc)
	ExpiresAt time.Time      `gorm:"index" json:"expires_at"`                                    // Expiry timestamp for cleanup
}

func (DirectUpload) TableName() string { return "direct_uploads" }