import { Injectable } from "@nestjs/common";
import {
  createPersianPdfDocument,
  persianPdfToBuffer,
} from "src/helpers/persian-pdf-document";
import {
  InsurerFileReportPdfResult,
  InsurerFileReportViewModel,
} from "./case-expert-report.types";
import { PR } from "./persian-report-labels";

@Injectable()
export class CaseExpertReportPdfService {
  async render(model: InsurerFileReportViewModel): Promise<InsurerFileReportPdfResult> {
    const pdf = createPersianPdfDocument();
    pdf.addTitle(model.title);
    pdf.addKeyValue(PR.publicId, model.publicId);
    pdf.addKeyValue(PR.requestNo, model.requestNo);
    pdf.addBlank();

    for (const section of model.sections) {
      pdf.addSection(section.title);
      for (const field of section.fields) {
        pdf.addKeyValue(field.label, field.value);
      }
      pdf.addBlank();
    }

    const buffer = await persianPdfToBuffer(pdf);
    const safeId = (model.publicId || "file").replace(/[^\w.-]+/g, "_");
    return {
      buffer,
      filename: `insurer-file-report-${safeId}.pdf`,
    };
  }
}