// import { Octokit } from "@octokit/rest";
import commandLineArgs from "command-line-args";

import fs from "fs/promises";
import { readFileSync } from "fs";
import path from "path";
import { fileURLToPath } from "url";
import pandoc from "node-pandoc";

// https://github.com/75lb/command-line-args
const optionDefinitions = [
  { name: "version", alias: "v", type: String, required: true },
  { name: "versionNumber", alias: "n", type: Number },
  { name: "versionDescription", alias: "d", type: String },
  { name: "changelog", alias: "l", type: String },
];

const cliArgs = commandLineArgs(optionDefinitions);

const appPaths = {};
appPaths.root = path.join(path.dirname(fileURLToPath(import.meta.url)), "../..");
appPaths.mainPackage = path.join(appPaths.root, "./package.json");
appPaths.electronPackage = path.join(appPaths.root, "./electron/package.json");
appPaths.constants = path.join(appPaths.root, "./src/Constants.ts");
appPaths.sphinxConf = path.join(appPaths.root, "./doc/source/conf.py");
appPaths.sphinxChangelog = path.join(appPaths.root, "./doc/source/changelog.rst");

async function main(version, versionNumber, changelog) {
  console.log(`Updating app files to match v${version}`);

  const [major, minor] = version.split(".");
  const shortVersion = `${major}.${minor}`;
  const modifiedMainPackage = (await fs.readFile(appPaths.mainPackage, "utf8")).replace(
    /(^\s*"version":\s)"(.*)",$/m,
    `$1"${version}",`,
  );
  await fs.writeFile(appPaths.mainPackage, modifiedMainPackage);
  console.log(`Modified ${appPaths.mainPackage}`);

  const modifiedElectronPackage = (await fs.readFile(appPaths.electronPackage, "utf8")).replace(
    /(^\s*"version":\s)"(.*)",$/m,
    `$1"${version}",`,
  );
  await fs.writeFile(appPaths.electronPackage, modifiedElectronPackage);
  console.log(`Modified ${appPaths.electronPackage}`);

  let modifiedConstants = (await fs.readFile(appPaths.constants, "utf8")).replace(
    /(^\s*?VersionString:\s)"(.*)",/m,
    `$1"${version}",`,
  );
  modifiedConstants = modifiedConstants.replace(/(^\s*?VersionNumber:\s)(.*),/m, `$1${versionNumber},`);

  if (changelog.trim() !== "") {
    let htmlChangelog = "";
    try {
      htmlChangelog = await transform(changelog, "html");
      console.log("Converted markdown changelog to html");
    } catch (error) {
      console.error(error);
    }

    const paddedChangelog = htmlChangelog
      .split("\n")
      .map((line) => (line.trim() !== "" ? "    " + line : ""))
      .join("\n")
      .replaceAll("`", "\\`");

    modifiedConstants = modifiedConstants.replace(/(^\s*?LatestUpdate:\s`\n)(.*)`,$/ms, `$1${paddedChangelog}\n\`,`);
  }
  await fs.writeFile(appPaths.constants, modifiedConstants);
  console.log(`Modified ${appPaths.constants}`);

  let modifiedSphinxConfig = (await fs.readFile(appPaths.sphinxConf, "utf8")).replace(
    /(^version = ')(.*)'$/m,
    `$1${shortVersion}'`,
  );
  modifiedSphinxConfig = modifiedSphinxConfig.replace(/(^release = ')(.*)'$/m, `$1${version}'`);
  await fs.writeFile(appPaths.sphinxConf, modifiedSphinxConfig);
  console.log(`Modified ${appPaths.sphinxConf}`);

  if (changelog.trim() !== "") {
    let modifiedSphinxChangelog = await fs.readFile(appPaths.sphinxChangelog, "utf8");
    const lines = modifiedSphinxChangelog.split("\n");
    let rstChangelog = "";
    try {
      rstChangelog = await transform(changelog, "rst");
      console.log("Converted markdown changelog to rst");
    } catch (error) {
      console.error(error);
    }

    lines.splice(5, 0, rstChangelog);
    modifiedSphinxChangelog = lines.join("\n");
    await fs.writeFile(appPaths.sphinxChangelog, modifiedSphinxChangelog);
    console.log(`Modified ${appPaths.sphinxChangelog}`);
  }
}

async function transform(markdown, format) {
  return new Promise((resolve, reject) => {
    const args = `-f markdown -t ${format}`;
    pandoc(markdown, args, (error, rst) => {
      if (error) {
        reject(error);
      } else {
        resolve(rst);
      }
    });
  });
}

async function getChangelog() {
  // Read from stdin
  // https://stackoverflow.com/a/56012724
  try {
    return readFileSync(0, "utf-8").replace("\r\n", "\n");
  } catch (error) {
    return "";
  }
}

getChangelog().then((changes) => {
  main(cliArgs.version, cliArgs.versionNumber, changes).then(() => console.log("Done"));
});
