import './styles.css';

const state = {
  promises: [],
  name: '',
  apology: '',
  consent: false,
  sincerity: null,
  sincerityPending: false,
  submissionId: '',
  sealed: false,
  ownerUnlocked: false,
  unlocked: false,
  sound: false,
  music: false,
};

const $ = (selector) => document.querySelector(selector);
const $$ = (selector) => [...document.querySelectorAll(selector)];

const promiseNotes = $('#promiseNotes');
const bouquet = $('#bouquet');
const selectedCount = $('#selectedCount');
const nameInput = $('#herName');
const apologyInput = $('#apologyText');
const consentCheck = $('#consentCheck');
const rateButton = $('#rateButton');
const sincerityState = $('#sincerityState');
const sincerityResult = $('#sincerityResult');
const unlockButton = $('#unlockButton');
const unlockHint = $('#unlockHint');
const decisionContent = $('#decisionContent');
const decisionStatus = $('#decisionStatus');
const toast = $('#toast');
const journeySteps = $$('.journey-step');
const journeySections = $$('[data-journey-section]');
const journeyProgress = $('#journeyProgress');
const heroArtWrap = $('.hero-art-wrap');
const heroArtCard = $('.hero-art-card');
const backgroundMusic = $('#backgroundMusic');
const musicToggle = $('.music-toggle');
const journeyLabels = ['notice the gap', 'rebuild the bridge', 'make it real', 'leave room'];

function setMusicState(isPlaying, blocked = false) {
  state.music = isPlaying;
  if (!musicToggle) return;
  musicToggle.setAttribute('aria-pressed', String(isPlaying));
  musicToggle.setAttribute('aria-label', isPlaying ? 'Pause background music' : 'Play background music');
  musicToggle.querySelector('span:last-child').textContent = isPlaying ? 'music on' : blocked ? 'tap for music' : 'music off';
}

async function startMusic(showBlocked = true) {
  if (!backgroundMusic) return false;
  try {
    backgroundMusic.volume = 0.42;
    await backgroundMusic.play();
    setMusicState(true);
    return true;
  } catch {
    setMusicState(false, showBlocked);
    return false;
  }
}

musicToggle?.addEventListener('click', async () => {
  if (state.music) {
    backgroundMusic.pause();
    setMusicState(false);
    showToast('The room is quiet again.');
  } else if (await startMusic(false)) {
    showToast('The room has a soundtrack now.');
  }
});

// Try audible autoplay first. If the browser blocks it, the first gesture unlocks music.
startMusic();
window.addEventListener('pointerdown', () => {
  if (!state.music) startMusic(false);
}, { once: true, passive: true });

function showToast(message) {
  toast.textContent = message;
  toast.classList.add('is-visible');
  window.clearTimeout(showToast.timer);
  showToast.timer = window.setTimeout(() => toast.classList.remove('is-visible'), 2600);
}

function setAnswerFieldsDisabled(disabled) {
  nameInput.disabled = disabled;
  apologyInput.disabled = disabled;
  consentCheck.disabled = disabled;
  $$('#promiseNotes button').forEach((button) => { button.disabled = disabled; });
}

function setJourneyStep(step) {
  const index = Math.max(0, Math.min(journeySteps.length - 1, step));
  journeySteps.forEach((item, itemIndex) => item.classList.toggle('is-current', itemIndex === index));
  journeyProgress.style.width = `${((index + 1) / journeySteps.length) * 100}%`;
  const chapterLabel = $('.chapter-label');
  if (chapterLabel) chapterLabel.textContent = journeyLabels[index];
  document.documentElement.style.setProperty('--journey-step', index + 1);
}

function scrollToElement(element, block = 'start') {
  element?.scrollIntoView({ behavior: window.matchMedia('(prefers-reduced-motion: reduce)').matches ? 'auto' : 'smooth', block });
}

journeySteps.forEach((step) => {
  step.addEventListener('click', () => {
    const target = $(step.dataset.journeyTarget);
    if (!target) return;
    target.classList.remove('journey-pulse');
    requestAnimationFrame(() => target.classList.add('journey-pulse'));
    scrollToElement(target);
    window.setTimeout(() => target.classList.remove('journey-pulse'), 900);
  });
});

const journeyObserver = new IntersectionObserver((entries) => {
  entries.forEach((entry) => {
    if (entry.isIntersecting) setJourneyStep(Number(entry.target.dataset.journeySection) - 1);
  });
}, { rootMargin: '-28% 0px -54% 0px', threshold: 0 });
journeySections.forEach((section) => journeyObserver.observe(section));
setJourneyStep(0);

if (heroArtWrap && heroArtCard && window.matchMedia('(pointer: fine)').matches) {
  heroArtWrap.addEventListener('pointermove', (event) => {
    const rect = heroArtWrap.getBoundingClientRect();
    const x = ((event.clientX - rect.left) / rect.width - .5) * 2;
    const y = ((event.clientY - rect.top) / rect.height - .5) * 2;
    heroArtCard.style.setProperty('--tilt-y', `${x * 4}deg`);
    heroArtCard.style.setProperty('--tilt-x', `${-y * 4}deg`);
  });
  heroArtWrap.addEventListener('pointerleave', () => {
    heroArtCard.style.setProperty('--tilt-y', '0deg');
    heroArtCard.style.setProperty('--tilt-x', '0deg');
  });
}

function renderBouquet() {
  selectedCount.textContent = state.promises.length;
  bouquet.replaceChildren();
  if (!state.promises.length) {
    const empty = document.createElement('span');
    empty.className = 'bouquet-empty';
    empty.textContent = 'Your honest ones will land here.';
    bouquet.appendChild(empty);
  } else {
    state.promises.forEach((promise, index) => {
      const pill = document.createElement('span');
      pill.className = 'bouquet-pill';
      const number = document.createElement('i');
      number.textContent = String(index + 1).padStart(2, '0');
      pill.append(number, document.createTextNode(promise));
      bouquet.appendChild(pill);
    });
  }
  $$('.promise-note[data-promise]').forEach((note) => {
    const selected = state.promises.includes(note.dataset.promise);
    note.classList.toggle('is-selected', selected);
    note.querySelector('.note-check').textContent = selected ? '✓' : '○';
  });
  updateUnlockState();
}

function updateUnlockState() {
  state.name = nameInput.value.trim();
  state.apology = apologyInput.value.trim();
  state.consent = consentCheck.checked;
  if (state.sealed && !state.ownerUnlocked) {
    rateButton.disabled = true;
    unlockButton.disabled = true;
    unlockHint.textContent = 'Submitted. The bridge is sealed until the owner opens it.';
    unlockHint.classList.remove('ready');
    if (state.unlocked) relockDecision();
    return;
  }
  const hasAnswered = state.promises.length >= 3 && state.name.length > 1 && state.apology.length >= 20 && state.consent;
  rateButton.disabled = !hasAnswered || state.sincerityPending || state.sincerity !== null;
  const ready = hasAnswered && state.sincerity !== null && state.ownerUnlocked;
  unlockButton.disabled = !ready;
  if (ready) {
    unlockHint.textContent = 'That’s everything. The room is ready for his answer.';
    unlockHint.classList.add('ready');
  } else {
    const missing = [];
    if (state.promises.length < 3) missing.push(`${3 - state.promises.length} more promise${3 - state.promises.length === 1 ? '' : 's'}`);
    if (state.name.length <= 1) missing.push('your name');
    if (state.apology.length < 20) missing.push('the hard part in your own words');
    if (!state.consent) missing.push('the brave little box');
    if (hasAnswered && state.sincerity === null) missing.push('the sincerity reading');
    if (state.sincerity !== null && !state.ownerUnlocked) missing.push('the private owner key');
    unlockHint.textContent = `Still needed: ${missing.join(' · ')}.`;
    unlockHint.classList.remove('ready');
  }
  if (!ready && state.unlocked) relockDecision();
}

function setResultText(element, text) {
  element.textContent = text;
}

function invalidateSincerity() {
  if (!state.sincerity && !state.ownerUnlocked) return;
  state.sincerity = null;
  state.submissionId = '';
  state.sealed = false;
  state.ownerUnlocked = false;
  setAnswerFieldsDisabled(false);
  sincerityResult.replaceChildren();
  sincerityState.textContent = 'waiting for the whole answer';
  sincerityState.classList.remove('has-result');
  $('#name').classList.remove('is-sealed');
  $('#promises').classList.remove('is-sealed');
}

function renderOwnerLock() {
  sincerityResult.replaceChildren();
  const wrap = document.createElement('div');
  wrap.className = 'private-lock reveal-in';
  const title = document.createElement('strong');
  title.textContent = 'sealed for his eyes';
  const copy = document.createElement('p');
  copy.textContent = 'Her exact words and the sincerity read are tucked away. Enter the owner key to view the answer.';
  const row = document.createElement('div');
  row.className = 'private-key-row';
  const input = document.createElement('input');
  input.id = 'ownerPassword';
  input.type = 'password';
  input.autocomplete = 'current-password';
  input.placeholder = 'owner key';
  input.maxLength = 200;
  const button = document.createElement('button');
  button.id = 'ownerUnlockButton';
  button.className = 'button button-dark';
  button.type = 'button';
  button.textContent = 'open private room';
  row.append(input, button);
  const status = document.createElement('span');
  status.id = 'ownerUnlockStatus';
  status.className = 'private-key-status';
  status.textContent = 'only the owner key can open this';
  wrap.append(title, copy, row, status);
  sincerityResult.appendChild(wrap);
  sincerityState.textContent = 'submitted / waiting for his key';
  sincerityState.classList.add('has-result');
}

function appendPrivateAnswer(parent, label, value) {
  const block = document.createElement('div');
  block.className = 'private-answer';
  const heading = document.createElement('span');
  heading.className = 'private-answer-label';
  heading.textContent = label;
  const text = document.createElement('p');
  text.textContent = value;
  block.append(heading, text);
  parent.appendChild(block);
}

function renderSincerity(result) {
  sincerityResult.replaceChildren();
  if (!state.ownerUnlocked) {
    renderOwnerLock();
    return;
  }
  const wrap = document.createElement('div');
  wrap.className = 'sincerity-reading reveal-in';
  const score = document.createElement('div');
  score.className = 'sincerity-score';
  setResultText(score, `${result.score}`);
  const outOf = document.createElement('span');
  outOf.textContent = '/100';
  score.appendChild(outOf);
  const body = document.createElement('div');
  body.className = 'sincerity-body';
  const label = document.createElement('strong');
  setResultText(label, result.label);
  const read = document.createElement('p');
  setResultText(read, result.read);
  const signal = document.createElement('span');
  signal.className = 'sincerity-signal';
  setResultText(signal, `care signal: ${result.careSignal}`);
  const source = document.createElement('span');
  source.className = 'sincerity-source';
  setResultText(source, result.source === 'model' ? 'model impression · still not a lie detector' : 'offline fallback · provider did not return a model read');
  body.append(label, read, signal, source);
  wrap.append(score, body);
  sincerityResult.appendChild(wrap);
  const dossier = document.createElement('div');
  dossier.className = 'private-dossier reveal-in';
  const dossierTitle = document.createElement('span');
  dossierTitle.className = 'mini-kicker';
  dossierTitle.textContent = 'her answers / exactly as submitted';
  dossier.appendChild(dossierTitle);
  appendPrivateAnswer(dossier, 'name', state.name);
  appendPrivateAnswer(dossier, 'the hard part', state.apology);
  appendPrivateAnswer(dossier, 'promises', state.promises.join(' · '));
  sincerityResult.appendChild(dossier);
  sincerityState.textContent = result.source === 'model' ? `${result.confidence} confidence / keep talking` : 'offline draft / keep talking';
  sincerityState.classList.add('has-result');
}

async function requestSincerity() {
  if (rateButton.disabled || state.sincerityPending) return;
  state.sincerityPending = true;
  rateButton.disabled = true;
  setAnswerFieldsDisabled(true);
  rateButton.innerHTML = 'reading the shape of it <span class="button-arrow">…</span>';
  sincerityState.textContent = 'listening between the lines';
  try {
    const response = await fetch('/api/sincerity', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ name: state.name, promises: state.promises, apology: state.apology, consent: state.consent }),
    });
    const payload = await response.json();
    if (!response.ok) throw new Error(payload.error || 'The reading did not arrive.');
    state.sincerity = { sealed: true };
    state.submissionId = payload.submissionId;
    state.sealed = true;
    state.ownerUnlocked = false;
    $('#name').classList.add('is-sealed');
    $('#promises').classList.add('is-sealed');
    state.name = '';
    state.promises = [];
    state.apology = '';
    state.consent = false;
    nameInput.value = '';
    apologyInput.value = '';
    consentCheck.checked = false;
    renderBouquet();
    renderSincerity(payload);
    showToast('The mirror has said its imperfect piece.');
  } catch (error) {
    state.sincerity = null;
    state.submissionId = '';
    setAnswerFieldsDisabled(false);
    sincerityState.textContent = 'the mirror went a little foggy';
    showToast(error.message || 'Could not read the room.');
  } finally {
    state.sincerityPending = false;
    rateButton.innerHTML = state.sincerity ? 'sealed for the owner <span class="button-arrow">⌁</span>' : 'try the reading again <span class="button-arrow">↻</span>';
    updateUnlockState();
  }
}

async function restorePersistedAnswer() {
  try {
    const response = await fetch('/api/latest-submission', { cache: 'no-store' });
    if (!response.ok) return;
    const payload = await response.json();
    if (!payload.available || !payload.submissionId) return;
    state.submissionId = payload.submissionId;
    state.sincerity = { sealed: true };
    state.sealed = true;
    state.ownerUnlocked = false;
    setAnswerFieldsDisabled(true);
    $('#name').classList.add('is-sealed');
    $('#promises').classList.add('is-sealed');
    renderSincerity(state.sincerity);
    updateUnlockState();
  } catch {
    // A temporary discovery failure should not prevent a new answer from being written.
  }
}

function relockDecision() {
  state.unlocked = false;
  decisionStatus.textContent = 'locked until it’s honest';
  decisionStatus.classList.remove('is-open');
  decisionContent.innerHTML = '<div class="decision-lock"><span>⌁</span><p>There’s nothing to decide yet.</p><small>The answer only appears when the apology has been made with care.</small></div>';
  $('#decision').classList.remove('is-open');
}

function addPromise(promise, noteEl) {
  if (!promise) return;
  if (state.promises.includes(promise)) {
    state.promises = state.promises.filter((item) => item !== promise);
    showToast('Promise tucked away for now.');
  } else if (state.promises.length >= 3) {
    showToast('Three honest promises are enough for one heart.');
    return;
  } else {
    state.promises.push(promise);
    showToast('That one feels worth keeping.');
  }
  if (noteEl) noteEl.classList.add('pop');
  invalidateSincerity();
  renderBouquet();
  if (state.promises.length === 3) {
    showToast('The bridge has three planks. Keep going.');
    window.setTimeout(() => scrollToElement($('#name'), 'center'), 420);
  }
}

promiseNotes.addEventListener('click', (event) => {
  const note = event.target.closest('.promise-note');
  if (!note) return;
  if (note.id === 'addPromise') {
    const custom = window.prompt('Write one promise in your own words:');
    if (custom?.trim()) {
      const value = custom.trim().slice(0, 90);
      if (!state.promises.includes(value) && state.promises.length < 3) {
        state.promises.push(value);
        invalidateSincerity();
        renderBouquet();
        showToast('Your words are the ones that matter most.');
        if (state.promises.length === 3) window.setTimeout(() => scrollToElement($('#name'), 'center'), 420);
      } else if (state.promises.length >= 3) {
        showToast('You already have three. Keep them close.');
      }
    }
    return;
  }
  addPromise(note.dataset.promise, note);
});

nameInput.addEventListener('input', () => {
  invalidateSincerity();
  const name = nameInput.value.trim();
  $('#nameHint').textContent = name ? `Okay, ${name}. That makes it real.` : 'A name makes a promise feel held.';
  updateUnlockState();
});
apologyInput.addEventListener('input', () => {
  const length = apologyInput.value.trim().length;
  $('#answerHint').textContent = length ? `${length}/20 minimum — specificity is a form of care.` : 'Say what changed, not only what you miss.';
  invalidateSincerity();
  updateUnlockState();
});
consentCheck.addEventListener('change', () => { invalidateSincerity(); updateUnlockState(); });
rateButton.addEventListener('click', requestSincerity);

sincerityResult.addEventListener('click', async (event) => {
  const button = event.target.closest('#ownerUnlockButton');
  if (!button) return;
  const input = $('#ownerPassword');
  const status = $('#ownerUnlockStatus');
  button.disabled = true;
  status.textContent = 'checking the key…';
  try {
    const response = await fetch('/api/owner-unlock', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ password: input.value, submissionId: state.submissionId }),
    });
    const payload = await response.json();
    if (!response.ok) throw new Error(payload.error || 'That key did not work.');
    const submission = payload.submission;
    state.name = submission.name;
    state.promises = submission.promises;
    state.apology = submission.apology;
    state.sealed = false;
    nameInput.value = state.name;
    apologyInput.value = state.apology;
    state.sincerity = submission.reading;
    state.ownerUnlocked = true;
    consentCheck.checked = true;
    setAnswerFieldsDisabled(true);
    renderBouquet();
    renderSincerity(state.sincerity);
    updateUnlockState();
    showToast('Private room open. The answer is yours to hold.');
  } catch (error) {
    status.textContent = error.message || 'That key did not work.';
    input.select();
    button.disabled = false;
  }
});

$$('[data-scroll]').forEach((button) => {
  button.addEventListener('click', () => scrollToElement($(button.dataset.scroll), 'center'));
});

unlockButton.addEventListener('click', () => {
  if (unlockButton.disabled) return;
  state.unlocked = true;
  decisionStatus.textContent = 'the room is open';
  decisionStatus.classList.add('is-open');
  const safeName = state.name.replace(/[<>]/g, '');
  decisionContent.innerHTML = `
    <div class="decision-open reveal-in">
      <p class="eyebrow"><span class="eyebrow-dot coral"></span> for him, with no trapdoor</p>
      <h2>${safeName}, she brought<br /><em>the honest version.</em></h2>
      <p class="decision-lede">She named what she’d do differently, signed it with her own name, and said she’ll respect your answer. You don’t owe a yes because someone finally said the right words.</p>
      <div class="decision-actions">
        <button class="button button-dark" type="button" id="acceptButton">accept the second chance <span class="button-arrow">↗</span></button>
        <button class="button button-outline" type="button" id="declineButton">not yet / not this time</button>
      </div>
      <p class="decision-note">Either answer can be kind. The kindest one is the true one.</p>
    </div>`;
  $('#decision').classList.add('is-open');
  setTimeout(() => scrollToElement($('#decision')), 120);
  $('#acceptButton').addEventListener('click', () => {
    decisionContent.innerHTML = `<div class="decision-result accepted reveal-in"><div class="result-heart">♥</div><p class="eyebrow">a soft yes</p><h2>Okay. Let’s try<br /><em>the real way.</em></h2><p>Not back to before. Forward, with the promises visible and the door unlocked from both sides.</p><div class="tiny-signoff">— a second chance is a new chapter</div><button class="text-button" type="button" id="resetButton">read it again <span>↻</span></button></div>`;
    decisionStatus.textContent = 'a new chapter';
    burstHearts();
    $('#resetButton').addEventListener('click', () => window.location.reload());
  });
  $('#declineButton').addEventListener('click', () => {
    decisionContent.innerHTML = `<div class="decision-result declined reveal-in"><div class="result-heart muted">♡</div><p class="eyebrow">a clear answer</p><h2>Not now is still<br /><em>an honest answer.</em></h2><p>Thank you for not turning a tender moment into a performance. Some doors need more time. Some need a kind goodbye.</p><div class="tiny-signoff">— take care of the truth</div><button class="text-button" type="button" id="resetButton">read it again <span>↻</span></button></div>`;
    decisionStatus.textContent = 'truth, held gently';
    $('#resetButton').addEventListener('click', () => window.location.reload());
  });
});

function burstHearts() {
  const symbols = ['♥', '♡', '✦', '·', '♥', '✧'];
  symbols.forEach((symbol, index) => {
    const heart = document.createElement('span');
    heart.className = 'burst-heart';
    heart.textContent = symbol;
    heart.style.setProperty('--x', `${(Math.random() - 0.5) * 260}px`);
    heart.style.setProperty('--y', `${-70 - Math.random() * 160}px`);
    heart.style.setProperty('--delay', `${index * 70}ms`);
    $('#decision').appendChild(heart);
    setTimeout(() => heart.remove(), 1800);
  });
}

let ticking = false;
function updateParallax() {
  const scrollY = window.scrollY;
  $$('[data-parallax]').forEach((el) => {
    const speed = Number(el.dataset.parallax || 0.1);
    const rect = el.getBoundingClientRect();
    const distance = rect.top + rect.height / 2 - window.innerHeight / 2;
    el.style.setProperty('--parallax-y', `${-distance * speed}px`);
  });
  ticking = false;
}
window.addEventListener('scroll', () => {
  if (!ticking) {
    window.requestAnimationFrame(updateParallax);
    ticking = true;
  }
}, { passive: true });
updateParallax();

$('.sound-toggle').addEventListener('click', (event) => {
  state.sound = !state.sound;
  event.currentTarget.setAttribute('aria-pressed', String(state.sound));
  $('#app').classList.toggle('motion-muted', !state.sound);
  event.currentTarget.querySelector('span:last-child').textContent = state.sound ? 'motion mode' : 'still mode';
  showToast(state.sound ? 'The bridge is moving again.' : 'Still mode, still romantic.');
});

const observer = new IntersectionObserver((entries) => {
  entries.forEach((entry) => {
    if (entry.isIntersecting) entry.target.classList.add('is-visible');
  });
}, { threshold: 0.12 });
$$('.reveal').forEach((el) => observer.observe(el));

renderBouquet();
restorePersistedAnswer();