import Handlebars from 'handlebars';

export class TemplateRenderer {
  render(
    subjectTemplate: string,
    bodyTemplate: string,
    context: TemplateContext,
  ): { subject: string; body: string } {
    const subjectCompiled = Handlebars.compile(subjectTemplate);
    const bodyCompiled = Handlebars.compile(bodyTemplate);
    return {
      subject: subjectCompiled(context),
      body: bodyCompiled(context),
    };
  }
}

export interface TemplateContext {
  ticket: {
    id: number;
    subject: string;
    status: string;
    queue_id: string;
    owner_id: string | null;
    creator_id: string;
    created_at: string;
    updated_at: string;
  };
  queue: {
    name: string;
  };
  transaction: {
    type: string;
    field: string | null;
    old_value: string | null;
    new_value: string | null;
  };
  custom_fields: Record<string, string>;
}