const fs = require('fs-extra');
const path = require('path');
const util = require('util');
const logger = require('winston');
const request = require('request-promise');
const tomlify = require('tomlify-j0.4');
const exec = require('sync-exec');

const fsPathCode = './citra-games-wiki/games'
const fsPathWiki = './citra-games-wiki.wiki'
const fsPathHugoContent = '../../site/content/game'
const fsPathHugoBoxart = '../../site/static/images/game/boxart'
const fsPathHugoIcon = '../../site/static/images/game/icons'
const fsPathHugoScreenshots = '../../site/static/images/screenshots0'
const fsPathHugoSavefiles = '../../site/static/savefiles/'

process.on('unhandledRejection', err => {
  logger.error('Unhandled rejection on process.');
  logger.error(err);
  process.exit(1);
});

function gitPull(directory, repository) {
  if (fs.existsSync(directory)) {
    logger.info(`Fetching latest from Github : ${directory}`);
    logger.info(`git --git-dir=${directory} pull`);
    exec(`git --git-dir=${directory} pull`);
  } else {
    logger.info(`Cloning repository from Github : ${directory}`);
    logger.info(`git clone ${repository}`);
    exec(`git clone ${repository}`);
  }
}

async function getDirectories(x) {
  return fs.readdir(x).filter(file => fs.lstatSync(path.join(x, file)).isDirectory())
}

async function run() {
  // Make sure the output directories in Hugo exist.
  [fsPathHugoContent, fsPathHugoBoxart, fsPathHugoIcon, fsPathHugoSavefiles, fsPathHugoScreenshots].forEach(function (path) {
    if (fs.existsSync(path) == false) {
      logger.info(`Creating Hugo output directory: ${path}`);
      fs.ensureDirSync(path);
    }
  });

  // Fetch game files stored in games-wiki repository.
  gitPull('./citra-games-wiki', 'https://github.com/citra-emu/citra-games-wiki.git');

  // Loop through each game and process it.
  let games = await request.get({ uri: 'https://api.citra-emu.org/gamedb/websiteFeed/', json: true })
  await Promise.all(games.map(async (x) => {
    try {
      logger.info(`Processing game: ${x.id}`);

      // Set metadata.
      x.date = `${new Date().toISOString()}`

      // In Hugo, data keys need to be strings.
      x.compatibility = x.compatibility.toString()

      x.testcases.forEach(x => x.compatibility = x.compatibility.toString())

      // Reverse the testcases so the most recent ones show up top.
      x.testcases = x.testcases.reverse()
      x.issues = x.issues || []

      // Copy the boxart for the game.
      fs.copySync(`${fsPathCode}/${x.id}/boxart.png`, `${fsPathHugoBoxart}/${x.id}.png`);

      // Copy the icon for the game.
      fs.copySync(`${fsPathCode}/${x.id}/icon.png`, `${fsPathHugoIcon}/${x.id}.png`);

      // SAVEFILE BLOCK
      var fsPathCodeSavefilesGame = `${fsPathCode}/${x.id}/savefiles/`;
      var fsPathHugoSavefilesGame = `${fsPathHugoSavefiles}/${x.id}/`;
      if (fs.existsSync(fsPathCodeSavefilesGame)) {
        // Create the savefile directory for the game.
        if (fs.existsSync(fsPathHugoSavefilesGame) == false) {
          fs.mkdirSync(fsPathHugoSavefilesGame);
        }

        // Copy all savefiles into the output folder, and read their data.
        fs.readdirSync(fsPathCodeSavefilesGame).forEach(file => {
          if (path.extname(file) == '.zip') {
            fs.copySync(`${fsPathCodeSavefilesGame}/${file}`, `${fsPathHugoSavefilesGame}/${file}`);
          }
        });
        // Finished copying all savefiles into the output folder, and reading their data.
      }
      // END SAVEFILE BLOCK

      // Copy the screenshots for the game.
      let fsPathScreenshotInputGame = `${fsPathCode}/${x.id}/screenshots/`;
      let fsPathScreenshotOutputGame = `${fsPathHugoScreenshots}/${x.id}/`;
      if (fs.existsSync(fsPathScreenshotInputGame)) {
        // Create the savefile directory for each game.
        if (fs.existsSync(fsPathScreenshotOutputGame) == false) {
          fs.mkdirSync(fsPathScreenshotOutputGame);
        }

        // Copy all screenshots into the output folder.
        fs.readdirSync(fsPathScreenshotInputGame).forEach(file => {
          if (path.extname(file) == '.png') {
            fs.copySync(`${fsPathScreenshotInputGame}/${file}`, `${fsPathScreenshotOutputGame}/${file}`);
          }
        });
      }

      // Clear out the wiki markdown so it won't be stored with the metadata.
      let wikiText = x.wiki_markdown
      x.wiki_markdown = null

      let meta = tomlify(x, null, 2);
      let contentOutput = `+++\r\n${meta}\r\n+++\r\n\r\n${wikiText}\r\n`;

      await fs.writeFile(`${fsPathHugoContent}/${x.id}.md`, contentOutput);

      return x
    } catch (ex) {
      logger.warn(`${x.id} ${x.title} failed to generate: ${ex}`);
      logger.error(ex);
      throw ex
    }
  }))
}

// Script start
run()