email

type Address struct {
	Email string `json:"email"`
	Name  string `json:"name,omitempty"`
}

type Attachment struct {
	Content     string `json:"content"`              // Base64 encoded content
	Type        string `json:"type"`                 // MIME type
	Filename    string `json:"filename"`             // File name
	Disposition string `json:"disposition"`          // inline or attachment
	ContentID   string `json:"content_id,omitempty"` // For inline attachments
}

type Config struct {
	Provider     string            // sendgrid, smtp, local
	APIKey       string            // For API-based providers
	FromEmail    string            // Default from email
	FromName     string            // Default from name
	SMTPHost     string            // For SMTP provider
	SMTPPort     int               // For SMTP provider
	SMTPUser     string            // For SMTP provider
	SMTPPassword string            // For SMTP provider
	Templates    map[string]string // Template name -> template content
	IsDev        bool              // Development mode flag
}

type LocalService struct {
	// contains filtered or unexported fields
}

type Message struct {
	From         Address                `json:"from"`
	To           []Address              `json:"to"`
	CC           []Address              `json:"cc,omitempty"`
	BCC          []Address              `json:"bcc,omitempty"`
	ReplyTo      *Address               `json:"reply_to,omitempty"`
	Subject      string                 `json:"subject"`
	Text         string                 `json:"text,omitempty"`
	HTML         string                 `json:"html,omitempty"`
	Attachments  []Attachment           `json:"attachments,omitempty"`
	Headers      map[string]string      `json:"headers,omitempty"`
	Metadata     map[string]string      `json:"metadata,omitempty"`
	TemplateID   string                 `json:"template_id,omitempty"`
	TemplateData map[string]interface{} `json:"template_data,omitempty"`
}

type SendGridService struct {
	// contains filtered or unexported fields
}

type Service interface {
	// Send sends an email message
	Send(ctx context.Context, message *Message) error

	// SendTemplate sends a templated email
	SendTemplate(ctx context.Context, templateName string, data interface{}, recipients []string) error

	// SendBatch sends multiple emails in batch
	SendBatch(ctx context.Context, messages []*Message) error

	// ValidateEmail validates an email address
	ValidateEmail(email string) error

	// GetProvider returns the current provider name
	GetProvider() string
}