import fs from "fs";
import { modelsPath } from "../utils/get-resource-paths";
import COMMAND from "../constants/commands";
import {
  compression,
  customModelsFolderPath,
  folderPath,
  noImageProcessing,
  outputFolderPath,
  saveOutputFolder,
  setChildProcesses,
  setCompression,
  setNoImageProcessing,
  setStopped,
  stopped,
} from "../utils/config-variables";
import convertAndScale from "../utils/convert-and-scale";
import { getSingleImageArguments } from "../utils/get-arguments";
import logit from "../utils/logit";
import slash from "../utils/slash";
import { spawnUpscayl } from "../utils/spawn-upscayl";
import { parse } from "path";
import DEFAULT_MODELS from "../constants/models";
import { getMainWindow } from "../main-window";
import { ImageUpscaylPayload } from "../../common/types/types";
import { ImageFormat } from "../utils/types";

const imageUpscayl = async (event, payload: ImageUpscaylPayload) => {
  const mainWindow = getMainWindow();

  if (!mainWindow) {
    logit("No main window found");
    return;
  }

  setNoImageProcessing(payload.noImageProcessing);
  setCompression(parseInt(payload.compression));

  const model = payload.model as string;
  const gpuId = payload.gpuId as string;
  const saveImageAs = payload.saveImageAs as ImageFormat;
  const overwrite = payload.overwrite as boolean;

  let inputDir = (payload.imagePath.match(/(.*)[\/\\]/)?.[1] || "") as string;
  let outputDir: string | undefined =
    folderPath || (payload.outputPath as string);

  if (saveOutputFolder === true && outputFolderPath) {
    outputDir = outputFolderPath;
  }

  const isDefaultModel = DEFAULT_MODELS.includes(model);

  const fullfileName = payload.imagePath.replace(/^.*[\\\/]/, "") as string;
  const fileName = parse(fullfileName).name;
  const fileExt = parse(fullfileName).ext;

  let initialScale = "4";
  if (model.includes("x1")) {
    initialScale = "1";
  } else if (model.includes("x2")) {
    initialScale = "2";
  } else if (model.includes("x3")) {
    initialScale = "3";
  } else {
    initialScale = "4";
  }

  const desiredScale = payload.scale;

  const outFile =
    outputDir +
    slash +
    fileName +
    "_upscayl_" +
    (noImageProcessing ? initialScale : desiredScale) +
    "x_" +
    model +
    "." +
    saveImageAs;

  // UPSCALE
  if (fs.existsSync(outFile) && !overwrite) {
    // If already upscayled, just output that file
    logit("✅ Already upscayled at: ", outFile);
    mainWindow.webContents.send(
      COMMAND.UPSCAYL_DONE,
      outFile.replace(
        /([^/\\]+)$/i,
        encodeURIComponent(outFile.match(/[^/\\]+$/i)![0])
      )
    );
  } else {
    logit(
      "✅ Upscayl Variables: ",
      JSON.stringify({
        model,
        gpuId,
        saveImageAs,
        inputDir,
        outputDir,
        fullfileName,
        fileName,
        initialScale: initialScale,
        desiredScale,
        outFile,
        compression,
      })
    );
    const upscayl = spawnUpscayl(
      "realesrgan",
      getSingleImageArguments(
        inputDir,
        fullfileName,
        outFile.slice(0, -3) + "png",
        isDefaultModel ? modelsPath : customModelsFolderPath ?? modelsPath,
        model,
        initialScale,
        gpuId,
        "png"
      ),
      logit
    );

    setChildProcesses(upscayl);

    setStopped(false);
    let isAlpha = false;
    let failed = false;

    const onData = (data: string) => {
      logit("image upscayl: ", data.toString());
      mainWindow.setProgressBar(parseFloat(data.slice(0, data.length)) / 100);
      data = data.toString();
      mainWindow.webContents.send(COMMAND.UPSCAYL_PROGRESS, data.toString());
      if (data.includes("invalid gpu") || data.includes("failed")) {
        logit("❌ INVALID GPU OR FAILED");
        upscayl.kill();
        failed = true;
      }
      if (data.includes("has alpha channel")) {
        logit("📢 INCLUDES ALPHA CHANNEL, CHANGING OUTFILE NAME!");
        isAlpha = true;
      }
    };
    const onError = (data) => {
      if (!mainWindow) return;
      mainWindow.setProgressBar(-1);
      mainWindow.webContents.send(COMMAND.UPSCAYL_PROGRESS, data.toString());
      failed = true;
      upscayl.kill();
      return;
    };
    const onClose = async () => {
      if (!failed && !stopped) {
        logit("💯 Done upscaling");
        logit("♻ Scaling and converting now...");
        if (noImageProcessing) {
          logit("🚫 Skipping scaling and converting");
          mainWindow.setProgressBar(-1);
          mainWindow.webContents.send(
            COMMAND.UPSCAYL_DONE,
            outFile.replace(
              /([^/\\]+)$/i,
              encodeURIComponent(outFile.match(/[^/\\]+$/i)![0])
            )
          );
          return;
        }
        mainWindow.webContents.send(COMMAND.SCALING_AND_CONVERTING);
        // Free up memory
        upscayl.kill();
        try {
          await convertAndScale(
            inputDir + slash + fullfileName,
            outFile.slice(0, -3) + "png",
            outFile,
            desiredScale,
            saveImageAs,
            onError
          );
          // Remove the png file (default) if the saveImageAs is not png
          fs.access(outFile.slice(0, -3) + "png", fs.constants.F_OK, (err) => {
            if (!err && saveImageAs !== "png") {
              logit("🗑 Removing png file");
              fs.unlinkSync(outFile.slice(0, -3) + "png");
            }
          });
          mainWindow.setProgressBar(-1);
          mainWindow.webContents.send(
            COMMAND.UPSCAYL_DONE,
            outFile.replace(
              /([^/\\]+)$/i,
              encodeURIComponent(outFile.match(/[^/\\]+$/i)![0])
            )
          );
        } catch (error) {
          logit(
            "❌ Error processing (scaling and converting) the image. Please report this error on GitHub.",
            error
          );
          upscayl.kill();
          mainWindow.webContents.send(
            COMMAND.UPSCAYL_ERROR,
            "Error processing (scaling and converting) the image. Please report this error on Upscayl GitHub Issues page.\n" +
              error
          );
        }
      }
    };

    upscayl.process.stderr.on("data", onData);
    upscayl.process.on("error", onError);
    upscayl.process.on("close", onClose);
  }
};

export default imageUpscayl;