// schedule.js — BlackRoad Network Broadcast Schedule
// 43 blocks x 20 min = 860 min (~14.3h) repeating cycle.
// Intelligence + human reality + story + system. Full-spectrum curiosity network.

export var SCHEDULE = [
  // ── Opening: Core Intelligence ──
  { sourceId: '3blue1brown',       title: 'Math Block',         category: 'Math',              fallbackSourceIds: ['numberphile','khanacademy'] },
  { sourceId: 'computerphile',     title: 'Systems Block',      category: 'Systems',           fallbackSourceIds: ['lowlevellearning','beneater'] },
  { sourceId: 'veritasium',        title: 'Deep Science',       category: 'Science',           fallbackSourceIds: ['sixtysymbols','sabinehossenfelder'] },
  { sourceId: 'dwdocumentary',     title: 'Documentary Hour',   category: 'Documentary',       fallbackSourceIds: ['freedocumentary','timeline'] },
  { sourceId: 'lowlevellearning',  title: 'Hacker Hour',        category: 'Hacker',            fallbackSourceIds: ['liveoverflow','computerphile'] },
  { sourceId: 'blackroadosinc',    title: 'Internal Broadcast', category: 'Internal',          fallbackSourceIds: ['computerphile','veritasium'], pinned: true },

  // ── Deep Layer: Meaning + Archive ──
  { sourceId: 'exurb1a',           title: 'Philosophy Hour',    category: 'Philosophy',        fallbackSourceIds: ['pursuitofwonder','academyofideas'] },
  { sourceId: 'realengineering',   title: 'How It Works',       category: 'Engineering',       fallbackSourceIds: ['practicalengineering','wendover'] },
  { sourceId: 'periscopefilm',     title: 'Archive Block',      category: 'Archive',           fallbackSourceIds: ['timeline','dwdocumentary'] },
  { sourceId: 'pbsspacetime',      title: 'Deep Space',         category: 'Deep Space',        fallbackSourceIds: ['sabinehossenfelder','veritasium'] },
  { sourceId: 'beneater',          title: 'Hardware Block',     category: 'Hardware',           fallbackSourceIds: ['lowlevellearning','computerphile'] },
  { sourceId: 'lemmino',           title: 'Cinematic Stories',  category: 'Cinematic',         fallbackSourceIds: ['johnnyharris','neo'] },
  { sourceId: 'twominutepapers',   title: 'AI Edge',            category: 'AI Edge',           fallbackSourceIds: ['yannickilcher','coldfusion'] },

  // ── Human Layer: Reality Check ──
  { sourceId: 'truly',             title: 'Human Stories',      category: 'Human Stories',     fallbackSourceIds: ['softwhiteunderbelly','insider'] },
  { sourceId: 'vox',               title: 'Context',            category: 'Context',           fallbackSourceIds: ['insider','wendover'] },
  { sourceId: 'numberphile',       title: 'Numbers Block',      category: 'Math',              fallbackSourceIds: ['3blue1brown','sixtysymbols'] },
  { sourceId: 'liveoverflow',      title: 'Security Block',     category: 'Security',          fallbackSourceIds: ['lowlevellearning','computerphile'] },
  { sourceId: 'sabinehossenfelder', title: 'Physics Frontier',  category: 'Physics Frontier',  fallbackSourceIds: ['pbsspacetime','veritasium'] },
  { sourceId: 'johnnyharris',      title: 'World Report',       category: 'World Report',      fallbackSourceIds: ['vox','wendover'] },
  { sourceId: 'stuffmadehere',     title: 'Invention Block',    category: 'Invention',         fallbackSourceIds: ['markrober','beneater'] },

  // ── Education Layer: Foundations ──
  { sourceId: 'khanacademy',       title: 'Foundations',         category: 'Education',         fallbackSourceIds: ['crashcourse','3blue1brown'] },
  { sourceId: 'freedocumentary',   title: 'Free Doc',           category: 'Documentary',       fallbackSourceIds: ['dwdocumentary','timeline'] },
  { sourceId: 'mitocw',            title: 'Lecture Hall',        category: 'Lecture',           fallbackSourceIds: ['khanacademy','computerphile'] },
  { sourceId: 'timeline',          title: 'History Block',      category: 'History',           fallbackSourceIds: ['dwdocumentary','periscopefilm'] },
  { sourceId: 'coldfusion',        title: 'Future Tech',        category: 'Future Tech',       fallbackSourceIds: ['twominutepapers','wendover'] },
  { sourceId: 'academyofideas',    title: 'Big Ideas',          category: 'Big Ideas',         fallbackSourceIds: ['exurb1a','pursuitofwonder'] },
  { sourceId: 'wendover',          title: 'Systems Logic',      category: 'Systems Logic',     fallbackSourceIds: ['realengineering','vox'] },
  { sourceId: 'markrober',         title: 'Engineering Play',   category: 'Engineering Play',  fallbackSourceIds: ['stuffmadehere','practicalengineering'] },

  // ── Energy Layer: Pace Change ──
  { sourceId: 'crashcourse',       title: 'Fast Track',         category: 'Education',         fallbackSourceIds: ['khanacademy','infographicsshow'] },
  { sourceId: 'practicalengineering', title: 'Real World',      category: 'Real World',        fallbackSourceIds: ['realengineering','wendover'] },
  { sourceId: 'softwhiteunderbelly', title: 'Underbelly',       category: 'Human Stories',     fallbackSourceIds: ['truly','pbsfrontline'] },
  { sourceId: 'pursuitofwonder',   title: 'Reflection',         category: 'Reflection',        fallbackSourceIds: ['exurb1a','closertotruth'] },
  { sourceId: 'thecodingtrain',    title: 'Creative Code',      category: 'Creative Code',     fallbackSourceIds: ['beneater','computerphile'] },
  { sourceId: 'kurzgesagt',        title: 'Visual Explainers',  category: 'Visual Explainers', fallbackSourceIds: ['crashcourse','infographicsshow'] },
  { sourceId: 'insider',           title: 'Deep Dive',          category: 'Features',          fallbackSourceIds: ['vice','vox'] },
  { sourceId: 'michaelreeves',     title: 'Chaos Block',        category: 'Chaos',             fallbackSourceIds: ['stuffmadehere','markrober'] },

  // ── Closing: Big Picture ──
  { sourceId: 'sixtysymbols',      title: 'Physics Block',      category: 'Physics',           fallbackSourceIds: ['veritasium','pbsspacetime'] },
  { sourceId: 'pbsfrontline',      title: 'Frontline',          category: 'Investigative',     fallbackSourceIds: ['dwdocumentary','vice'] },
  { sourceId: 'infographicsshow',  title: 'Visual Data',        category: 'Explainers',        fallbackSourceIds: ['kurzgesagt','vox'] },
  { sourceId: 'vice',              title: 'On the Ground',      category: 'Documentary',       fallbackSourceIds: ['insider','johnnyharris'] },
  { sourceId: 'closertotruth',     title: 'Ultimate Questions', category: 'Ultimate Questions', fallbackSourceIds: ['exurb1a','academyofideas'] },
  { sourceId: 'neo',               title: 'Deep Story',         category: 'Deep Story',        fallbackSourceIds: ['lemmino','johnnyharris'] },
  { sourceId: 'blackroadosinc',    title: 'Night Broadcast',    category: 'Internal',          fallbackSourceIds: ['exurb1a','pursuitofwonder'], pinned: true },
];

export var BLOCK_DURATION = 20;
export var CYCLE_LENGTH = SCHEDULE.length * BLOCK_DURATION;

// ── Time Helpers ──

export function getCurrentTimeHHMM() {
  var now = new Date();
  return String(now.getHours()).padStart(2, '0') + ':' + String(now.getMinutes()).padStart(2, '0');
}

export function getCurrentBlockIndex() {
  var now = new Date();
  var mins = now.getHours() * 60 + now.getMinutes();
  var posInCycle = mins % CYCLE_LENGTH;
  return Math.floor(posInCycle / BLOCK_DURATION);
}

export function getCurrentBlock() {
  var idx = getCurrentBlockIndex();
  return idx >= 0 && idx < SCHEDULE.length ? SCHEDULE[idx] : null;
}

export function getNextBlock() {
  var idx = getCurrentBlockIndex();
  return SCHEDULE[(idx + 1) % SCHEDULE.length] || null;
}

export function getBlockAfterNext() {
  var idx = getCurrentBlockIndex();
  return SCHEDULE[(idx + 2) % SCHEDULE.length] || null;
}

export function getPreviousBlock() {
  var idx = getCurrentBlockIndex();
  return idx > 0 ? SCHEDULE[idx - 1] : SCHEDULE[SCHEDULE.length - 1];
}

export function getUpcomingBlocks(count) {
  count = count || 4;
  var idx = getCurrentBlockIndex();
  var blocks = [];
  for (var i = 1; i <= count; i++) {
    blocks.push(SCHEDULE[(idx + i) % SCHEDULE.length]);
  }
  return blocks;
}

export function formatTimeHHMM(hhmm) {
  if (typeof hhmm === 'number') {
    var wrapped = ((hhmm % 1440) + 1440) % 1440;
    var h = Math.floor(wrapped / 60);
    var m = wrapped % 60;
    var ampm = h >= 12 ? 'PM' : 'AM';
    return (h % 12 || 12) + ':' + String(m).padStart(2, '0') + ' ' + ampm;
  }
  var parts = hhmm.split(':').map(Number);
  var ampm2 = parts[0] >= 12 ? 'PM' : 'AM';
  return (parts[0] % 12 || 12) + ':' + String(parts[1]).padStart(2, '0') + ' ' + ampm2;
}