// The builder page: file, mods with their dependencies, the two
// confirmations, build and download (the work is in builder.js).
(function () {
  'use strict';
  var MODS = [
    { id: 'extended_bpm', name: 'Extended BPM', by: 'arnoldasr', state: 'stable',
      what: 'BPM with two decimals: the tenths as a small digit above, the hundredths below.' },
    { id: 'phasemeter', name: 'Phase meter', by: 'arnoldasr', state: 'stable',
      what: 'Two-line phase meter instead of the four boxes; UTILITY › PHASE METER (was SLIP FLASHING) switches it.' },
    { id: 'rgb_waveform', name: 'RGB waveform', by: 'arnoldasr', state: 'stable',
      what: 'The big waveform in RGB colours, the overview as a red-to-white gradient.' },
    { id: 'cuecolours', name: 'Cue colours', by: 'ours', state: 'stable',
      what: 'Memory cues in their rekordbox colours; rekordbox hot cues shown as lettered boxes.' },
    { id: 'hotcuekeys', name: 'Hot cue keys', by: 'ours', state: 'experimental', needs: 'cuecolours',
      what: 'Hot cues A–C on the BEAT DIVIDE keys: play, gate, set and delete, saved on the USB, loaded in the background.' },
    { id: 'ledsaver', name: 'LED animation', by: 'ours', state: 'stable',
      what: 'While the screen saver dims the display, the button LEDs and the jog rings play an animation. UTILITY › LED ANIMATION.' },
    { id: 'credit', name: 'Boot text', by: 'ours', state: 'stable',
      what: 'The boot screen says “Pionaarr Mods 1.0” instead of “Ver 1.31”.' }
  ];
  var chosen = {};
  MODS.forEach(function (m) { chosen[m.id] = m.state === 'stable'; });
  var file = null;

  function byId(id) { return document.getElementById(id); }
  function needsOf(id) { var m = MODS.filter(function (x) { return x.id === id; })[0]; return m && m.needs; }

  function toggle(id, on) {
    chosen[id] = on;
    var note = '';
    if (on && needsOf(id) && !chosen[needsOf(id)]) { chosen[needsOf(id)] = true; note = 'Ticked ' + needsOf(id) + ' too: ' + id + ' needs it.'; }
    if (!on) MODS.forEach(function (m) {
      if (m.needs === id && chosen[m.id]) { chosen[m.id] = false; note = 'Unticked ' + m.id + ' too: it needs ' + id + '.'; }
    });
    byId('pick-note').textContent = note;
    render();
  }

  function render() {
    var box = byId('picks');
    box.innerHTML = '';
    MODS.forEach(function (m) {
      var row = document.createElement('label');
      row.className = 'pick' + (chosen[m.id] ? ' on' : '');
      row.innerHTML =
        '<input type="checkbox"' + (chosen[m.id] ? ' checked' : '') + '>' +
        '<span class="pick-main"><span class="pick-name">' + m.name + ' <code>' + m.id + '</code></span>' +
        '<span class="pick-what">' + m.what + '</span>' +
        '<span class="pick-by">' + (m.by === 'ours' ? 'ours · made with Claude Code' : 'by arnoldasr') +
        (m.needs ? ' · needs <code>' + m.needs + '</code>' : '') + '</span></span>' +
        '<span class="state ' + m.state + '">' + m.state + '</span>';
      row.querySelector('input').addEventListener('change', function (e) { toggle(m.id, e.target.checked); });
      box.appendChild(row);
    });
    ready();
  }

  function ready() {
    var why = !file ? 'Choose the update file first.'
      : !byId('agree-risk').checked || !byId('agree-ai').checked ? 'Confirm both points above to build.' : '';
    byId('build').disabled = !!why;
    byId('build-why').textContent = why;
  }

  function setFile(f) {
    file = f;
    byId('file-state').textContent = f ? f.name + ' · ' + (f.size / 1048576).toFixed(1) + ' MB (checked when you build)' : 'No file yet';
    byId('drop').classList.toggle('has', !!f);
    byId('result').hidden = true;
    ready();
  }

  function log(msg, cls) {
    var l = byId('log');
    l.hidden = false;
    var p = document.createElement('div');
    if (cls) p.className = cls;
    p.textContent = msg;
    l.appendChild(p);
    l.scrollTop = l.scrollHeight;
  }

  var url = null;
  function run() {
    var names = MODS.map(function (m) { return m.id; }).filter(function (id) { return chosen[id]; });
    byId('build').disabled = true;
    byId('result').hidden = true;
    byId('log').innerHTML = '';
    log('mods: ' + (names.length ? names.join(', ') : 'none (stock)'));
    file.arrayBuffer().then(function (buf) {
      return window.CDJBuilder.build(new Uint8Array(buf), names, log);
    }).then(function (r) {
      log('done: every check passed', 'ok');
      if (url) URL.revokeObjectURL(url);
      url = URL.createObjectURL(new Blob([r.upd], { type: 'application/octet-stream' }));
      byId('download').href = url;
      byId('sum').innerHTML = 'SHA-256 of the file <code>' + r.updSha + '</code><br>of the application <code>' + r.appSha + '</code>';
      var ul = byId('checks');
      ul.innerHTML = '';
      r.checks.forEach(function (c) { var li = document.createElement('li'); li.textContent = c; ul.appendChild(li); });
      byId('result').hidden = false;
    }).catch(function (e) {
      log('stopped: ' + e.message, 'bad');
    }).then(ready);
  }

  document.addEventListener('DOMContentLoaded', function () {
    render();
    byId('file').addEventListener('change', function (e) { setFile(e.target.files[0] || null); });
    var drop = byId('drop');
    ['dragenter', 'dragover'].forEach(function (t) { drop.addEventListener(t, function (e) { e.preventDefault(); drop.classList.add('over'); }); });
    ['dragleave', 'drop'].forEach(function (t) { drop.addEventListener(t, function (e) { e.preventDefault(); drop.classList.remove('over'); }); });
    drop.addEventListener('drop', function (e) { if (e.dataTransfer.files[0]) setFile(e.dataTransfer.files[0]); });
    byId('agree-risk').addEventListener('change', ready);
    byId('agree-ai').addEventListener('change', ready);
    byId('build').addEventListener('click', run);
  });
})();