const DEBUG = false;

import{ setupLevel, setupLevelUi } from './level.js';


function buildLevel(x, y, t) {
  const ts = t.slice(0, -1);
  const tf = t[t.length-1];
  return setupLevel(ts.map(T => [ x(T), y(T) ]), [ x(tf), y(tf) ]);
}

const levels = {
  'initial jump': [ [], setupLevel([], [8, 0]) ],
  'monopole harvesting': [ ['initial jump'], setupLevel([[3, 3]], [8,8]) ],

  'inverted': [ ['initial jump'], setupLevel([[-3, -3]], [-8,-8]) ],
  'double inverted': [ ['initial jump'], setupLevel([[-8, -8]], [-3,-3]) ],

  'parabolic 0': [ 
    ['monopole harvesting'], 
    buildLevel(t => t, t => t**2, [...Array(4).keys()].map(x => x)),
  ],
  'parabolic 1': [ 
    ['monopole harvesting'], 
    buildLevel(t => t-2, t => t**2 - 2, [...Array(4).keys()].map(x => x)),
  ],
  'parabolic 2': [ 
    ['monopole harvesting'], 
    buildLevel(t => t**2, t => t, [...Array(4).keys()].map(x => x)),
  ],
  'parabolic 3': [ 
    ['monopole harvesting'], 
    buildLevel(t => t-2, t => (t-2)**2, [...Array(4).keys()].map(x => x)),
  ],
  'parabolic 4': [ 
    ['monopole harvesting'], 
    buildLevel(t => -0.5*(t-3)**2+1, t => t-4, [...Array(6).keys()].map(x => x)),
  ],

  'sinusoidal 0': [
    ['parabolic 4'], 
    buildLevel(t => Math.sin(t), t => t, [...Array(6).keys()].map(x => 0.5 * Math.PI * x)),
  ],
  'sinusoidal 1': [
    ['parabolic 4'], 
    buildLevel(t => t-4, t => 4*Math.sin(t), [...Array(12).keys()].map(x => 0.25 * Math.PI * x)),
  ],
  '(co)sinusoidal 2': [
    ['parabolic 4'], 
    buildLevel(t => t-4, t => 4*Math.cos(t), [...Array(12).keys()].map(x => 0.25 * Math.PI * x)),
  ],
  'orbital': [
    ['(co)sinusoidal 2'],
    buildLevel(t => 8*Math.cos(t), t => 8*Math.sin(t), [...Array(7).keys()].map(x => 0.25 * Math.PI * (x+1))),
  ],
  'spiral': [
    ['orbital'],
    buildLevel(t => Math.cos(t)*t, t => Math.sin(t)*t, [...Array(8).keys()].map(x => 0.25 * Math.PI * x)),
  ],

};

export function setupLevelSelectUi(root, sfx) {
  const levelList = document.createElement('ol');
  const levelPicker = name => {
    const [ dependencies, level ] = levels[name];
    const allDependenciesSatisfied = dependencies.map(x => levels[x][1].completed).reduce((acc, x) => acc && x, true);
    if (DEBUG || allDependenciesSatisfied) {
      sfx.listAppearAudio.currentTime = 0;
      sfx.listAppearAudio.play();
      const button = document.createElement('input');
      button.type = 'button';
      button.value = name;
      button.onmouseenter = () => {
        sfx.buttonEnterAudio.currentTime = 0;
        sfx.buttonEnterAudio.play();
      }
      button.onclick = () => {
        sfx.buttonClickAudio.currentTime = 0;
        sfx.buttonClickAudio.play();
        root.innerText = '';
        setupLevelUi(level, root, sfx);
      }
      const li = document.createElement('li');
      li.appendChild(button);
      if (level.completed) {
        li.appendChild(document.createTextNode('[complete]'));
      }
      levelList.appendChild(li);
    }
  }

  let time = 0;
  [...Object.keys(levels)].forEach(name => {
    setTimeout(() => {
      levelPicker(name);
    }, 100 * time + 100)
    time += 1;
  });
  const header = document.createElement('h1');
  header.classList.add('center');
  header.innerText = 'AVAILABLE CONTRACTS';
  root.appendChild(header);
  const p = document.createElement('p');
  p.innerText = 'Please select a General Products AMH hyperspace navigation contract from the list below.';
  root.appendChild(p);
  root.appendChild(levelList);
}