storage = require("Storage");
Bangle.setLCDPower(1);
g.clear();

// constants
const settingsfile = "memorytrainer.settings.json";
const moduleList = [];
storage.list(/\.memorytrainer\.js$/).forEach(module => moduleList.push(eval(storage.read(module))));

// utilities
function wait(s) {
  c_time = getTime();
  while(getTime() - c_time <= s) {}
}
function getSettings() {
  return Object.assign({"firstrun": true, "fullscreen": true}, storage.readJSON(settingsfile, true) || {});
}


// UI functions
function animate100x100img_big2small(img, minscale, maxscale) {
  for(img_scale = minscale; img_scale <= maxscale; img_scale+=0.3) {
    try {
      g.drawImage(img, (g.getWidth()-100*img_scale)/2, (g.getHeight()-100*img_scale)/2, {scale: img_scale});
    } catch(e) {}  // place the image in the middle of screen (100 is the image width and height)
    g.clear();
    wait(1/60);
  }
  for(img_scale = maxscale; img_scale >= minscale; img_scale-=0.4) {
    try {
      g.drawImage(img, (g.getWidth()-100*img_scale)/2, (g.getHeight()-100*img_scale)/2, {scale: img_scale});
    } catch(e) {}
    g.clear();
    wait(1/60);
  }
}

function homescreen() {
  g.clear();
  if(moduleList.length == 0) {
    E.showMessage("No module to load.\nExiting...", {"title": "ERROR", "img": atob("FBQBAfgAf+Af/4P//D+fx/n+f5/v+f//n//5//+f//n////3//5/n+P//D//wf/4B/4AH4A=")});
    wait(5);
    Bangle.showLauncher();
  }
  E.showMessage(":/\nModules aren't implemented yet.\nSee you soon!", "COMING SOON");
}

function setupWizard() {
  E.showPrompt(
    "Do you want the app to stay full screen (default)?",
    { "title": "FULLSCREEN", "buttons": {"Yes!": true, "No, I love Widgets!": false} }
  ).then(function(v) { 
    if(settings.fullscreen != v) {
      settings.fullscreen = v;
      storage.writeJSON(settingsfile, settings);
      E.showMessage("Changes will be visible after a restart of the application.", "INFO");
      wait(2);
    }
    // always do start homescreen
    g.clear();
    E.showMessage("You can now use your fully configured MemoryTrainer app.", "CONGRATULATIONS!");
    wait(2);
    homescreen();
  });
}

function welcome(new_user) {
  var brain_trainer_text = storage.readJSON("memorytrainer.icons.json", true).brain_trainer_text;
  var img_brain_trainer_text = brain_trainer_text.data;
  if(new_user) {
    E.showMessage("Hello!");
    wait(1);
    g.clear();
    wait(0.2);
    E.showMessage("This is a\nBRAIN-TRAINER.");
    wait(1);
    g.clear();
    wait(0.2);
    setupWizard();
    return;
  }
  g.drawImage(img_brain_trainer_text, g.getWidth()/2, g.getHeight()/2, {rotate: 0.04, scale: 1.2});
  wait(1);
  homescreen();
}


// now the real code begins
var settings = getSettings();

animate100x100img_big2small(storage.read("memorytrainer.png"), 0.1, 1.5);
if(settings.firstrun) {
  welcome(true);
  settings.firstrun = false;
  storage.writeJSON(settingsfile, settings);
} else {
  welcome(false);
}