const fs = require('fs');
const fsextra = require('fs-extra');
const path = require('path');
const util = require('util');
const logger = require('winston');

const sanitizeHtml = require('sanitize-html');

const toml = require('toml');
const tomlify = require('tomlify-j0.4');
const blackfriday = require('./blackfriday.js');

const del = require('delete');
const exec = require('sync-exec');

const fsPathCode = './citra-games-wiki';
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/';

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}`);
  }
}

function getDirectories (srcpath) {
  return fs.readdirSync(srcpath)
    .filter(file => fs.lstatSync(path.join(srcpath, file)).isDirectory())
}

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

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

// 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.mkdirSync(path);
  }
});

try {
  // Loop through each game folder.
  getDirectories(fsPathCode).forEach(function(game) {
    try {
      if (game == '.git') { return; }

      logger.info(`Processing game: ${game}`);

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

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

      var model = toml.parse(fs.readFileSync(`${fsPathCode}/${game}/game.dat`, 'utf8'));
      let currentDate = new Date();
      model.date = `${currentDate.toISOString()}`;

      // SHORTCUTS BLOCK
      // Parse testcase information out of the dat to reinject as shortcut values.
      if (model.testcases == null || model.testcases.length == 0) {
        model.compatibility = "99";
        model.testcase_date = "2000-01-01";
      } else {
        let recent = model.testcases[0];
        
        model.compatibility = recent.compatibility;
        model.testcase_date = recent.date;
      }
      // END SHORTCUTS BLOCK

      // SAVEFILE BLOCK
      var fsPathCodeSavefilesGame = `${fsPathCode}/${game}/savefiles/`;
      var fsPathHugoSavefilesGame = `${fsPathHugoSavefiles}/${game}/`;
      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.
        model.savefiles = [];
        fs.readdirSync(fsPathCodeSavefilesGame).forEach(file => {
          if (path.extname(file) == '.zip') {
            fsextra.copySync(`${fsPathCodeSavefilesGame}/${file}`, `${fsPathHugoSavefilesGame}/${file}`);
          } else if (path.extname(file) == '.dat') {
            // Read the data file into an object.
            let savefile = toml.parse(fs.readFileSync(`${fsPathCodeSavefilesGame}/${file}`, 'utf8'));

            // Store the contents of the file in memory for adding it into the markdown later.
            model.savefiles.push({
              filename: file.replace('.dat', '.zip'),
              title: savefile.title,
              description: savefile.description,
              author: savefile.author,
              title_id: savefile.title_id
            });
          }
        });
        // Finished copying all savefiles into the output folder, and reading their data.
      }
      // END SAVEFILE BLOCK

      // Copy the screenshots for the game.
      let fsPathScreenshotInputGame = `${fsPathCode}/${game}/screenshots/`;
      let fsPathScreenshotOutputGame = `${fsPathHugoScreenshots}/${game}/`;
      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') {
            fsextra.copySync(`${fsPathScreenshotInputGame}/${file}`, `${fsPathScreenshotOutputGame}/${file}`);
          }
        });
      }

      // WIKI BLOCK
      var wikiText = "";
      let fsPathWikiGame = `${fsPathWiki}/${game}.md`;
      if (fs.existsSync(fsPathWikiGame)) {
        wikiText = fs.readFileSync(fsPathWikiGame, 'utf8');

        // Fix Blackfriday markdown rendering differences.
        wikiText = blackfriday.fixLists(wikiText);
        wikiText = blackfriday.fixLinks(wikiText);
      } else {
        wikiText = "## No wiki exists yet for this game.";
      }
      // END WIKI BLOCK

      let modelText = tomlify(model, null, 2);

      let contentOutput = `+++\r\n${modelText}\r\n+++\r\n\r\n${wikiText}\r\n`;
      fs.writeFileSync(`${fsPathHugoContent}/${game}.md`, contentOutput);
    } catch (ex) {
      logger.warn(`${game} failed to generate: ${ex}`);
      logger.error(ex);
    }
  });
} catch (ex) {
  logger.error(ex);
}