import { Request, Response } from "express";
import fs from "fs-extra";
import path from "path";
import { logger } from "../server";
import ListableChecker from "../util/listableChecker";
import { PathToRoBillsFolder, PathToRoFolder } from "../util/pathGenerators";
import { FolderPaths } from "../util/serverInit";
import { JobsListMedia } from "./jobsListMedia";

export async function JobsMoveMedia(req: Request, res: Response) {
  const jobid: string = (req.body.jobid || "").trim();
  const from_jobid: string = (req.body.from_jobid || "").trim();
  const files: string[] = req.body.files; //Just file names.

  try {
    //Validate the request is valid and contains everything that it needs.
    if (from_jobid === "") {
      res.status(400).json({ error: "from_jobid must be specified. " });
      return;
    }
    if (files.length === 0) {
      res.status(400).json({ error: "files must be specified. " });
      return;
    }

    // Setup lists for both file locations
    const jobFileList: string[] = (
      await fs.readdir(PathToRoFolder(from_jobid), {
        withFileTypes: true
      })
    )
      .filter((f) => f.isFile() && ListableChecker(f))
      .map((dirent) => dirent.name);
    const billFileList: string[] = (
      await fs.readdir(PathToRoBillsFolder(from_jobid), {
        withFileTypes: true
      })
    )
      .filter((f) => f.isFile() && ListableChecker(f))
      .map((dirent) => dirent.name);

    //Make sure the destination RO directory exists.
    await fs.ensureDir(PathToRoFolder(jobid));
    logger.debug("Moving job based media.", { jobid, from_jobid, files });
    const movingQueue: Promise<void>[] = [];

    files.forEach((file) => {
      if (jobFileList.includes(file)) {
        movingQueue.push(
          fs.move(path.join(FolderPaths.Jobs, from_jobid, file), path.join(FolderPaths.Jobs, jobid, file))
        );

        movingQueue.push(
          fs.move(
            path.join(FolderPaths.Jobs, from_jobid, FolderPaths.ThumbsSubDir, file.replace(/\.[^/.]+$/, ".png")),
            path.join(FolderPaths.Jobs, jobid, FolderPaths.ThumbsSubDir, file.replace(/\.[^/.]+$/, ".png"))
          )
        );
      }
      if (billFileList.includes(file)) {
        movingQueue.push(
          fs.move(
            path.join(FolderPaths.Jobs, from_jobid, FolderPaths.BillsSubDir, file),
            path.join(FolderPaths.Jobs, jobid, FolderPaths.BillsSubDir, file)
          )
        );

        movingQueue.push(
          fs.move(
            path.join(
              FolderPaths.Jobs,
              from_jobid,
              FolderPaths.BillsSubDir,
              FolderPaths.ThumbsSubDir,
              file.replace(/\.[^/.]+$/, ".png")
            ),
            path.join(
              FolderPaths.Jobs,
              jobid,
              FolderPaths.BillsSubDir,
              FolderPaths.ThumbsSubDir,
              file.replace(/\.[^/.]+$/, ".png")
            )
          )
        );
      }
    });

    //Use AllSettled as it allows for individual moves to fail.
    //e.g. if the thumbnail does not exist.
    await Promise.allSettled(movingQueue);

    JobsListMedia(req, res);
  } catch (err) {
    logger.error("Error moving job media", {
      from_jobid,
      jobid,
      files,
      err
    });
    res.status(500).send(err);
  }
}