import { EmailProviderType } from '../types';

export interface ITemplateService {
  renderTemplate(
    templateId: string, 
    data: Record<string, any>, 
    provider: EmailProviderType
  ): Promise<string>;
  
  validateTemplate(
    templateId: string, 
    provider: EmailProviderType
  ): Promise<boolean>;
  
  getTemplateInfo(
    templateId: string, 
    provider: EmailProviderType
  ): Promise<TemplateInfo>;
}

export interface TemplateInfo {
  id: string;
  name: string;
  version: string;
  variables: string[];
  lastModified: Date;
  provider: EmailProviderType;
}

export interface TemplateRenderOptions {
  locale?: string;
  version?: string;
  fallbackToCustom?: boolean;
}

export interface TemplateValidationResult {
  isValid: boolean;
  errors: string[];
  warnings: string[];
  variables: string[];
  missingVariables: string[];
}