const gulp = require("gulp");
const rename = require("gulp-rename");
const realFavicon = require("gulp-real-favicon");

const fs = require("fs");
const del = require("del");
const through = require("through2");

var BUILD = "build";
var FAVICON_DATA_FILE = BUILD + "/faviconData.json";

function noop() {
  return through.obj();
}

gulp.task("prepare", function (done) {
  if (!fs.existsSync(BUILD)) {
    fs.mkdirSync(BUILD, {
      recursive: true,
    });
  }
  done();
});

gulp.task("favicon-svg", function () {
  return gulp
    .src("src/favicon/favicon-main.svg")
    .pipe(rename("favicon.svg"))
    .pipe(gulp.dest("static/favicon/"));
});

gulp.task("favicon-generate", function (done) {
  realFavicon.generateFavicon(
    {
      masterPicture: "src/favicon/favicon-main.svg",
      dest: "static/favicon",
      iconsPath: "/favicon",
      design: {
        ios: {
          pictureAspect: "backgroundAndMargin",
          backgroundColor: "#2f333e",
          margin: "32%",
          assets: {
            ios6AndPriorIcons: true,
            ios7AndLaterIcons: true,
            precomposedIcons: false,
            declareOnlyDefaultIcon: true,
          },
        },
        desktopBrowser: {
          design: "raw",
        },
        windows: {
          pictureAspect: "whiteSilhouette",
          backgroundColor: "#2f333e",
          onConflict: "override",
          assets: {
            windows80Ie10Tile: false,
            windows10Ie11EdgeTiles: {
              small: true,
              medium: true,
              big: true,
              rectangle: true,
            },
          },
        },
        androidChrome: {
          pictureAspect: "backgroundAndMargin",
          margin: "19%",
          backgroundColor: "#2f333e",
          themeColor: "#2f333e",
          manifest: {
            name: "the Geeklab",
            display: "standalone",
            orientation: "notSet",
            onConflict: "override",
            declared: true,
          },
          assets: {
            legacyIcon: false,
            lowResolutionIcons: false,
          },
        },
        safariPinnedTab: {
          pictureAspect: "silhouette",
          themeColor: "#4186c9",
        },
      },
      settings: {
        scalingAlgorithm: "Mitchell",
        errorOnImageTooSmall: false,
        readmeFile: false,
        htmlCodeFile: false,
        usePathAsIs: false,
      },
      markupFile: FAVICON_DATA_FILE,
    },
    function () {
      done();
    }
  );
});

gulp.task("favicon-check-update", function (done) {
  var currentVersion = JSON.parse(fs.readFileSync(FAVICON_DATA_FILE)).version;
  realFavicon.checkForUpdates(currentVersion, function (err) {
    if (err) {
      throw err;
    }
  });
  done();
});

gulp.task("clean", function () {
  return del([BUILD, "static/favicon/", "resources"]);
});

/* Task series */

gulp.task(
  "favicon",
  gulp.series(
    "clean",
    "prepare",
    "favicon-svg",
    "favicon-generate",
    "favicon-check-update"
  )
);