import { Request, Response } from "express";
import InspectionService from "../../../service/unit/inspection/inspectionService";
import InspectionFactory from "../../../factory/admin/unit/inspection/inspection";
import {
  CreateInspectionCommand,
  DeleteInspectionCommand,
  FinishInspectionCommand,
  UpdateInspectionCommand,
} from "../../../command/unit/inspection/inspectionCommand";
import InspectionCommandHandler from "../../../command/unit/inspection/inspectionCommandHandler";
import BadRequestException from "../../../exceptions/badRequestException";
import ForbiddenRequestException from "../../../exceptions/forbiddenRequestException";
import { CreateOrUpdateInspectionPointResultCommand } from "../../../command/unit/inspection/inspectionPointResultCommand";
import InspectionPointResultCommandHandler from "../../../command/unit/inspection/inspectionPointResultCommandHandler";
import { InspectionPointEnum } from "../../../enums/inspectionEnum";
import multer from "multer";
import { FileSystemHelper } from "../../../helpers/fileSystemHelper";
import { PdfExport } from "../../../helpers/pdfExport";
import { PDFDocument } from "pdf-lib";
import sharp from "sharp";

/**
 * @description get all inspections sorted by id not having newer inspection
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function getAllInspectionsSortedNotHavingNewer(req: Request, res: Response): Promise<any> {
  let offset = parseInt((req.query.offset as string) ?? "0");
  let count = parseInt((req.query.count as string) ?? "25");
  let noLimit = req.query.noLimit === "true";

  let [inspections, total] = await InspectionService.getAllSortedNotHavingNewer({ offset, count, noLimit });

  res.json({
    inspections: InspectionFactory.mapToBaseNext(inspections),
    total: total,
    offset: offset,
    count: count,
  });
}

/**
 * @description get all inspections running
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function getAllInspectionsRunning(req: Request, res: Response): Promise<any> {
  let offset = parseInt((req.query.offset as string) ?? "0");
  let count = parseInt((req.query.count as string) ?? "25");
  let noLimit = req.query.noLimit === "true";

  let [inspections, total] = await InspectionService.getAllRunning({ offset, count, noLimit });

  res.json({
    inspections: InspectionFactory.mapToBaseMinified(inspections),
    total: total,
    offset: offset,
    count: count,
  });
}

/**
 * @description get all inspections for related id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function getAllInspectionsForRelated(req: Request, res: Response): Promise<any> {
  let relation = req.params.related as "vehicle" | "equipment" | "wearable";
  let relationId = req.params.relatedId as string;
  let offset = parseInt((req.query.offset as string) ?? "0");
  let count = parseInt((req.query.count as string) ?? "25");
  let noLimit = req.query.noLimit === "true";

  let where;
  if (relation == "equipment") {
    where = { equipmentId: relationId };
  } else if (relation == "vehicle") {
    where = { vehicleId: relationId };
  } else {
    where = { wearableId: relationId };
  }
  let [inspections, total] = await InspectionService.getAllForRelated(where, { offset, count, noLimit });

  res.json({
    inspections: InspectionFactory.mapToBaseMinified(inspections),
    total: total,
    offset: offset,
    count: count,
  });
}

/**
 * @description get inspection by id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function getInspectionPrintoutById(req: Request, res: Response): Promise<any> {
  const inspectionId = req.params.id;
  let inspection = await InspectionService.getById(inspectionId);

  if (inspection.finishedAt == null)
    throw new ForbiddenRequestException("this inspection has not been finished yet and it so does not have a printout");

  let filepath = FileSystemHelper.formatPath("inspection", inspection.id, "printout.pdf");

  res.sendFile(filepath, {
    headers: {
      "Content-Type": "application/pdf",
    },
  });
}

/**
 * @description get inspection by id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function getInspectionById(req: Request, res: Response): Promise<any> {
  const inspectionId = req.params.id;
  let inspection = await InspectionService.getById(inspectionId);

  res.json(InspectionFactory.mapToSingle(inspection));
}

/**
 * @description create inspection
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function createInspection(req: Request, res: Response): Promise<any> {
  const context = req.body.context;
  const inspectionPlanId = req.body.inspectionPlanId;
  const relatedId = req.body.relatedId;
  const assigned = req.body.assigned;
  const nextInspection = req.body.nextInspection || null;

  if (assigned != "equipment" && assigned != "vehicle" && assigned != "wearable")
    throw new BadRequestException("set assigned to equipment or vehicle or wearable");

  let existsUnfinished = await InspectionService.existsUnfinishedInspectionToPlan(
    inspectionPlanId,
    assigned,
    relatedId
  );
  if (existsUnfinished) throw new ForbiddenRequestException("there is already an unfinished inspection existing");

  let createInspection: CreateInspectionCommand = {
    context,
    nextInspection,
    inspectionPlanId,
    relatedId,
    assigned,
  };
  let inspectionId = await InspectionCommandHandler.create(createInspection);

  res.status(200).send(inspectionId);
}

/**
 * @description update inspection by id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function updateInspectionById(req: Request, res: Response): Promise<any> {
  const inspectionId = req.params.id;
  const context = req.body.context;
  const nextInspection = req.body.nextInspection || null;

  let updateInspection: UpdateInspectionCommand = {
    id: inspectionId,
    context,
    nextInspection,
  };
  await InspectionCommandHandler.update(updateInspection);

  res.sendStatus(204);
}

/**
 * @description update inspection by id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function updateInspectionResults(req: Request, res: Response): Promise<any> {
  const inspectionId = req.params.id;
  const pointResults = JSON.parse(req.body.results) as Array<{ inspectionPointId: string; value: string }>;
  const pointFiles = req.files as Array<Express.Multer.File>;

  let inspection = await InspectionService.getById(inspectionId);

  let updateResults: Array<CreateOrUpdateInspectionPointResultCommand> = pointResults.map((pr) => ({
    inspectionPointId: pr.inspectionPointId,
    value:
      inspection.inspectionVersionedPlan.inspectionPoints.find((ip) => ip.id == pr.inspectionPointId).type ==
        InspectionPointEnum.file && pr.value == "set"
        ? pointFiles.find((f) => f.filename.startsWith(pr.inspectionPointId))?.filename
        : pr.value,
    inspectionId,
  }));
  await InspectionPointResultCommandHandler.createOrUpdateMultiple(updateResults);

  res.sendStatus(204);
}

/**
 * @description finish inspection by id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function finishInspection(req: Request, res: Response): Promise<any> {
  const inspectionId = req.params.id;

  let inspection = await InspectionService.getById(inspectionId);

  function getValueToInspectionPoint(inspectionPointId: string) {
    return inspection.pointResults.find((c) => c.inspectionPointId == inspectionPointId)?.value;
  }

  let everythingFilled = inspection.inspectionVersionedPlan.inspectionPoints.every((p) => {
    if (p.type == InspectionPointEnum.file) {
      return getValueToInspectionPoint(p.id);
    } else if (p.type == InspectionPointEnum.oknok) {
      let value = getValueToInspectionPoint(p.id);
      return (["true", "false"].includes(value) ? (value as "true" | "false") : "") != "";
    } else {
      return !!getValueToInspectionPoint(p.id);
    }
  });
  if (!everythingFilled) throw new ForbiddenRequestException("fill out every field before finishing inspection");

  let formattedInspection = InspectionFactory.mapToSingle(inspection);
  let title = `Prüf-Ausdruck_${[formattedInspection.related.code ?? "", formattedInspection.related.name].join("_")}_${
    formattedInspection.inspectionPlan.title
  }_${new Date(formattedInspection.finished ?? "").toLocaleDateString("de-de")}`;

  let inspectionPoints = [];
  for (const ip of formattedInspection.inspectionVersionedPlan.inspectionPoints.sort(
    (a, b) => (a.sort ?? 0) - (b.sort ?? 0)
  )) {
    let value = formattedInspection.checks.find((c) => c.inspectionPointId == ip.id).value;
    let image = "";
    if (ip.type == InspectionPointEnum.file && ip.others == "img") {
      const imagePath = FileSystemHelper.formatPath("inspection", inspection.id, value);
      let pngImageBytes = await sharp(imagePath).png().toBuffer();
      image = `data:image/png;base64,${pngImageBytes.toString("base64")}`;
    } else if (ip.type == InspectionPointEnum.oknok) {
      value = value ? "OK" : "Nicht OK";
    }
    inspectionPoints.push({
      title: ip.title,
      description: ip.description,
      type: ip.type,
      min: ip.min,
      max: ip.max,
      others: ip.others,
      value: value,
      image: image,
    });
  }

  let pdf = await PdfExport.renderFile({
    template: "inspection",
    title,
    saveToDisk: false,
    data: {
      inspector: `${req.lastname}, ${req.firstname}`,
      context: formattedInspection.context || "---",
      createdAt: formattedInspection.created,
      finishedAt: formattedInspection.finished ?? new Date(),
      nextInspection: formattedInspection.nextInspection,
      related: formattedInspection.related,
      plan: formattedInspection.inspectionPlan,
      planVersion: formattedInspection.inspectionVersionedPlan.version,
      planTitle: formattedInspection.inspectionPlan.title,
      checks: inspectionPoints,
    },
  });

  const finalDocument = await PDFDocument.create();
  const printout = await PDFDocument.load(pdf);
  const copiedPages = await finalDocument.copyPages(printout, printout.getPageIndices());
  copiedPages.forEach((page) => finalDocument.addPage(page));

  let resultsForAppend = inspectionPoints.filter((ip) => ip.type == InspectionPointEnum.file && ip.others == "pdf");

  if (resultsForAppend.length !== 0) {
    const appendixPage = finalDocument.addPage();
    const { width, height } = appendixPage.getSize();
    appendixPage.drawText("Anhang:", {
      x: 50,
      y: height - 50,
      size: 24,
    });
  }

  for (const appendix of resultsForAppend) {
    const appendixPdfBytes = FileSystemHelper.readFileAsBase64("inspection", inspection.id, appendix.value);
    const appendixPdf = await PDFDocument.load(appendixPdfBytes);
    const appendixPages = await finalDocument.copyPages(appendixPdf, appendixPdf.getPageIndices());
    appendixPages.forEach((page) => finalDocument.addPage(page));

    /** print image
      const imagePath = FileSystemHelper.formatPath("inspection", inspection.id, checkValue);
      let pngImageBytes = await sharp(imagePath).png().toBuffer();
      let image = await finalDocument.embedPng(pngImageBytes);
      let dims = image.scale(1);
      if (image) {
        const page = finalDocument.addPage();
        const { width, height } = page.getSize();
        const x = (width - dims.width) / 2;
        const y = (height - dims.height) / 2;
        page.drawImage(image, {
          x,
          y,
          width: dims.width,
          height: dims.height,
        });
      }
       */
  }

  const mergedPdfBytes = await finalDocument.save();
  FileSystemHelper.writeFile(`inspection/${inspection.id}`, `printout.pdf`, mergedPdfBytes);

  let finish: FinishInspectionCommand = {
    id: inspectionId,
  };
  await InspectionCommandHandler.finish(finish);

  res.sendStatus(204);
}

/**
 * @description delete inspection by id
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function deleteInspectionById(req: Request, res: Response): Promise<any> {
  const inspectionId = req.params.id;

  let deleteInspectionData = await InspectionService.getById(inspectionId);
  if (deleteInspectionData.finishedAt != null) {
    throw new ForbiddenRequestException("Cannot delete as inspection is already finished");
  }

  let deleteInspection: DeleteInspectionCommand = {
    id: inspectionId,
  };
  await InspectionCommandHandler.delete(deleteInspection);

  res.sendStatus(204);
}