require('checkenv').check();

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 tenant = process.env.TENANT

const fsPathCode = `./${tenant}-games-wiki/games`
const fsPathHugo = '../../../site'
const fsPathHugoContent = `${fsPathHugo}/content/game`
const fsPathHugoBoxart = `${fsPathHugo}/static/images/game/boxart`
const fsPathHugoIcon = `${fsPathHugo}/static/images/game/icons`
const fsPathHugoScreenshots = `${fsPathHugo}/static/images/screenshots0`
const fsPathHugoSavefiles = `${fsPathHugo}/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(`./${tenant}-games-wiki`, `https://github.com/${tenant}-emu/${tenant}-games-wiki.git`);

  // Loop through each game and process it.
  let games = await request.get({ uri: `https://api.${tenant}-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.
      if (fs.existsSync(`${fsPathCode}/${x.id}/boxart.png`)) {
        fs.copySync(`${fsPathCode}/${x.id}/boxart.png`, `${fsPathHugoBoxart}/${x.id}.png`);
      }

      // Copy the icon for the game.
      if (fs.existsSync(`${fsPathCode}/${x.id}/icon.png`)) {
        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.toToml(x, {space: 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()