/* ─────────────────────────────────────────────────────────────
   Repertory – frontend app
   Plain JS, no build step, no framework.
───────────────────────────────────────────────────────────── */

// ── State ────────────────────────────────────────────────────
let allTunes      = [];
let allSources    = [];
let allMusicians  = [];
let allInstruments = [];
let allTunings    = [];
let allReferenceSites = [];
let sortCol       = 'name';
let sortDir       = 'asc';

// editing state
let editingTuneId  = null;   // null = add mode
let editingEntryId = null;   // null = no existing instrument entry

// notes modal state
let notesTuneId  = null;
let notesEntryId = null;

let unlocked = false;

// ── DOM refs ─────────────────────────────────────────────────
const $  = id => document.getElementById(id);
const $$ = sel => document.querySelectorAll(sel);

const statusEl         = $('status');
const tbody            = $('tune-tbody');
const emptyMsg         = $('empty-msg');
const tuneModal        = $('tune-modal');
const notesModal       = $('notes-modal');
const tuneForm         = $('tune-form');
const refsList         = $('refs-list');
const btnUnlock        = $('btn-unlock');
const btnAddTune       = $('btn-add-tune');
const sourceInput      = $('source-input');
const sourceDatalist   = $('source-list');
const musicianDatalist = $('musician-list');
const instrumentSelect = $('instrument-select');
const tuningDatalist   = $('tuning-list');
const btnDeleteTune    = $('btn-delete-tune');
const btnEditNotes     = $('btn-edit-notes');
const btnBulkEdit      = $('btn-bulk-edit');
const bulkEditPopover  = $('bulk-edit-popover');
const bulkRefsModal    = $('bulk-refs-modal');
const bulkRefsList     = $('bulk-refs-list');
const refsModal        = $('refs-modal');
const refsModalList    = $('refs-modal-list');
const refSiteDatalist  = $('ref-site-list');

// ── Config ───────────────────────────────────────────────────
const _cfg = window.REPERTORY_CONFIG || {};

function getApiKey() {
  return _cfg.apiKey || sessionStorage.getItem('apiKey') || '';
}

// ── Unlock ───────────────────────────────────────────────────
if (getApiKey()) setUnlocked(true);

btnUnlock.addEventListener('click', () => {
  const key = prompt('API key:');
  if (!key) return;
  sessionStorage.setItem('apiKey', key);
  if (!_cfg.apiUrl) {
    const url = prompt('API URL (e.g. https://your-server:5000):');
    if (url) sessionStorage.setItem('apiUrl', url.replace(/\/$/, ''));
  }
  setUnlocked(true);
});

function setUnlocked(val) {
  unlocked = val;
  btnUnlock.hidden = val;
  btnAddTune.hidden = !val;
  btnBulkEdit.hidden = !val;
  // Show/hide edit column header and edit buttons
  const editHeader = document.querySelector('.edit-col');
  if (editHeader) editHeader.hidden = !val;
  $$('.btn-edit-row').forEach(b => { b.hidden = !val; });
  $$('.note-edit-controls').forEach(el => { el.hidden = !val; });
  $('btn-add-tune-note').hidden = !val;
  $('btn-add-inst-note').hidden = !val;
}

// ── API helpers ───────────────────────────────────────────────
function resolvedApiUrl() {
  return (_cfg.apiUrl || sessionStorage.getItem('apiUrl') || '').replace(/\/$/, '');
}

async function apiFetch(path, options = {}) {
  const url = resolvedApiUrl() + path;
  const headers = { 'Content-Type': 'application/json', ...(options.headers || {}) };
  if (options.method && options.method !== 'GET') {
    headers['X-API-Key'] = getApiKey();
  }
  const res = await fetch(url, { ...options, headers });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`${res.status} ${res.statusText}: ${text}`);
  }
  return res.json();
}

function setStatus(msg, isError = false) {
  statusEl.textContent = msg;
  statusEl.style.color = isError ? '#eb5757' : '#6fcf97';
}

// ── Load ──────────────────────────────────────────────────────
async function loadAll() {
  setStatus('Loading…');
  try {
    [allTunes, allSources, allMusicians, allInstruments, allTunings, allReferenceSites] = await Promise.all([
      apiFetch('/tunes/'),
      apiFetch('/sources/'),
      apiFetch('/musicians/'),
      apiFetch('/instruments'),
      apiFetch('/tunings/'),
      apiFetch('/reference_sites/'),
    ]);
    populateFilterOptions();
    populateDatalist(sourceDatalist,   allSources);
    populateDatalist(musicianDatalist, allMusicians);
    populateDatalist(tuningDatalist,   allTunings);
    populateDatalist(refSiteDatalist,  allReferenceSites);
    populateInstrumentSelect();
    renderTable();
    setStatus(`${allTunes.length} tunes loaded`);
  } catch (e) {
    setStatus(e.message, true);
  }
}

function populateDatalist(datalist, items) {
  datalist.innerHTML = '';
  items.forEach(item => {
    const opt = document.createElement('option');
    opt.value = item.name;
    datalist.appendChild(opt);
  });
}

function populateInstrumentSelect(selectedId = null) {
  instrumentSelect.innerHTML = '<option value="">— none —</option>';
  allInstruments.forEach(inst => {
    const opt = document.createElement('option');
    opt.value = inst.id;
    opt.textContent = inst.name;
    if (selectedId && inst.id === selectedId) opt.selected = true;
    instrumentSelect.appendChild(opt);
  });
}

function populateFilterOptions() {
  // Nothing to populate in DOM — popover dropdowns are built on demand
  // from allSources, allInstruments, allTunings in buildDropdownOptions()
}

// ── Quick-add ─────────────────────────────────────────────────
async function quickAdd(endpoint, promptText, list, datalist, onDone) {
  const name = prompt(promptText);
  if (!name) return null;
  const existing = list.find(x => x.name.toLowerCase() === name.trim().toLowerCase());
  if (existing) {
    if (onDone) onDone(existing);
    return existing;
  }
  try {
    const item = await apiFetch(endpoint, { method: 'POST', body: JSON.stringify({ name: name.trim() }) });
    list.push(item);
    list.sort((a, b) => a.name.localeCompare(b.name));
    if (datalist) populateDatalist(datalist, list);
    if (onDone) onDone(item);
    return item;
  } catch (e) {
    setStatus(e.message, true);
    return null;
  }
}

$('btn-quick-add-source').addEventListener('click', async () => {
  await quickAdd('/sources/', 'New source name:', allSources, sourceDatalist, item => {
    sourceInput.value = item.name;
    populateFilterOptions();
  });
});

$('btn-quick-add-musician').addEventListener('click', async () => {
  await quickAdd('/musicians/', 'New musician name:', allMusicians, musicianDatalist, item => {
    tuneForm.elements.inst_learned_from.value = item.name;
  });
});

$('btn-quick-add-tuning').addEventListener('click', async () => {
  await quickAdd('/tunings/', 'New tuning name:', allTunings, tuningDatalist, item => {
    tuneForm.elements.inst_tuning.value = item.name;
    populateFilterOptions();
  });
});

// ── Resolve name → id ─────────────────────────────────────────
function resolveSourceId(name) {
  if (!name) return null;
  return allSources.find(x => x.name.toLowerCase() === name.toLowerCase())?.id ?? null;
}

function resolveMusicianId(name) {
  if (!name) return null;
  return allMusicians.find(x => x.name.toLowerCase() === name.toLowerCase())?.id ?? null;
}

function resolveTuningId(name) {
  if (!name) return null;
  return allTunings.find(x => x.name.toLowerCase() === name.toLowerCase())?.id ?? null;
}

// ── Rows: one per instrument entry ────────────────────────────
// For tunes with no instrument entries, emit one row with empty instrument cols
function buildRows(tunes) {
  const rows = [];
  for (const tune of tunes) {
    if (tune.instruments.length === 0) {
      rows.push({ tune, entry: null });
    } else {
      for (const entry of tune.instruments) {
        rows.push({ tune, entry });
      }
    }
  }
  return rows;
}

// ── Filters (popover per column) ─────────────────────────────
const filters = {
  key:        null,
  source:     null,
  modal:      null,
  instrument: null,
  tuning:     null,
  status:     null,
  difficulty: null,
};

const popover      = $('filter-popover');
const popoverInner = $('filter-popover-inner');
let   activeFilterKey = null;

const BOOL_FILTERS     = new Set(['modal']);
const DROPDOWN_FILTERS = new Set(['source', 'instrument', 'tuning', 'difficulty', 'status']);

function openFilterPopover(key, thEl) {
  if (activeFilterKey === key) { closeFilterPopover(); return; }
  activeFilterKey = key;
  popoverInner.innerHTML = '';

  if (BOOL_FILTERS.has(key)) {
    const label = document.createElement('label');
    label.className = 'popover-checkbox-row';
    const cb = document.createElement('input');
    cb.type = 'checkbox';
    if (filters[key] === true)       { cb.checked = true;  cb.indeterminate = false; }
    else if (filters[key] === false) { cb.checked = false; cb.indeterminate = true;  }
    else                             { cb.checked = false; cb.indeterminate = false; }
    const names = { modal: 'Modal' };
    label.appendChild(cb);
    label.appendChild(document.createTextNode(names[key] ?? key));
    popoverInner.appendChild(label);
    cb.addEventListener('change', () => {
      if (filters[key] === null)  { filters[key] = true;  cb.checked = true;  cb.indeterminate = false; }
      else if (filters[key] === true)  { filters[key] = false; cb.checked = false; cb.indeterminate = true;  }
      else                             { filters[key] = null;  cb.checked = false; cb.indeterminate = false; }
      updateFilterIndicators(); renderTable();
    });

  } else if (DROPDOWN_FILTERS.has(key)) {
    const sel = document.createElement('select');
    buildDropdownOptions(key).forEach(([val, lbl]) => {
      const opt = document.createElement('option');
      opt.value = val; opt.textContent = lbl;
      if (val === (filters[key] ?? '')) opt.selected = true;
      sel.appendChild(opt);
    });
    popoverInner.appendChild(sel);
    sel.addEventListener('change', () => {
      filters[key] = sel.value || null;
      updateFilterIndicators(); renderTable();
    });

  } else {
    // key — plain text
    const inp = document.createElement('input');
    inp.type = 'text'; inp.placeholder = 'Filter…'; inp.value = filters[key] ?? '';
    popoverInner.appendChild(inp);
    inp.addEventListener('input', () => {
      filters[key] = inp.value || null;
      updateFilterIndicators(); renderTable();
    });
    requestAnimationFrame(() => inp.focus());
  }

  const clr = document.createElement('button');
  clr.className = 'popover-clear'; clr.textContent = 'Clear';
  clr.addEventListener('click', () => {
    filters[key] = null; updateFilterIndicators(); renderTable(); closeFilterPopover();
  });
  popoverInner.appendChild(clr);

  const rect = thEl.getBoundingClientRect();
  popover.hidden = false;
  popover.style.top  = `${rect.bottom + 4}px`;
  popover.style.left = `${Math.min(rect.left, window.innerWidth - 200)}px`;
}

function closeFilterPopover() {
  popover.hidden = true;
  activeFilterKey = null;
}

function buildDropdownOptions(key) {
  const none = [['', '— all —']];
  if (key === 'source')     return [...none, ...allSources.map(s     => [String(s.id), s.name])];
  if (key === 'instrument') return [...none, ...allInstruments.map(i => [String(i.id), i.name])];
  if (key === 'tuning')     return [...none, ...allTunings.map(t     => [String(t.id), t.name])];
  if (key === 'difficulty') return [...none, ['easy', 'Easy'], ['hard', 'Hard']];
  if (key === 'status')     return [...none, ['callable', 'Callable'], ['review', 'Needs Review'], ['to_learn', 'To Learn']];
  return none;
}

function updateFilterIndicators() {
  $$('th[data-filter]').forEach(th => {
    th.classList.toggle('filter-active', filters[th.dataset.filter] !== null);
  });
  const anyActive = Object.values(filters).some(v => v !== null) || $('filter-search').value;
  $('btn-clear-filters').hidden = !anyActive;
}

$$('th[data-filter]').forEach(th => {
  th.addEventListener('click', e => { e.stopPropagation(); openFilterPopover(th.dataset.filter, th); });
});

document.addEventListener('click', e => {
  if (!popover.hidden && !popover.contains(e.target)) closeFilterPopover();
});
document.addEventListener('keydown', e => { if (e.key === 'Escape') closeFilterPopover(); });

$('filter-search').addEventListener('input', () => { updateFilterIndicators(); renderTable(); });

$('btn-clear-filters').addEventListener('click', () => {
  Object.keys(filters).forEach(k => { filters[k] = null; });
  $('filter-search').value = '';
  updateFilterIndicators(); renderTable(); closeFilterPopover();
});

// ── Match function ────────────────────────────────────────────
function rowMatchesFilters(tune, entry) {
  const search = $('filter-search').value.toLowerCase();
  if (search && !tune.name?.toLowerCase().includes(search)) return false;
  if (filters.key    && tune.key?.toLowerCase() !== filters.key.toLowerCase()) return false;
  if (filters.source && String(tune.source_id) !== filters.source) return false;
  if (filters.modal  !== null && tune.modal !== filters.modal) return false;

  if (filters.instrument && (!entry || String(entry.instrument_id) !== filters.instrument)) return false;
  if (entry) {
    if (filters.tuning     && String(entry.tuning_id) !== filters.tuning) return false;
    if (filters.status && entry.status !== filters.status) return false;
    if (filters.difficulty && entry.difficulty?.toLowerCase() !== filters.difficulty) return false;
  }
  return true;
}

// ── Sorting ───────────────────────────────────────────────────
function sortTunes(tunes) {
  return [...tunes].sort((a, b) => {
    let av = a[sortCol] ?? '';
    let bv = b[sortCol] ?? '';
    if (typeof av === 'string') av = av.toLowerCase();
    if (typeof bv === 'string') bv = bv.toLowerCase();
    if (av < bv) return sortDir === 'asc' ? -1 : 1;
    if (av > bv) return sortDir === 'asc' ?  1 : -1;
    return 0;
  });
}

$$('#tune-table thead th[data-col]').forEach(th => {
  th.addEventListener('click', () => {
    const col = th.dataset.col;
    sortDir = sortCol === col && sortDir === 'asc' ? 'desc' : 'asc';
    sortCol = col;
    $$('#tune-table thead th').forEach(t => t.classList.remove('sort-asc', 'sort-desc'));
    th.classList.add(sortDir === 'asc' ? 'sort-asc' : 'sort-desc');
    renderTable();
  });
});

// ── Render ────────────────────────────────────────────────────
function renderTable() {
  const sorted  = sortTunes(allTunes);
  const rows    = buildRows(sorted).filter(({ tune, entry }) => rowMatchesFilters(tune, entry));

  tbody.innerHTML = '';
  emptyMsg.hidden = rows.length > 0;

  rows.forEach(({ tune, entry }) => {
    const hasNotes = (tune.notes?.length > 0) || (entry?.notes?.length > 0);

    // ── Mobile 2-line card data ──────────────────────────────────
    const nameRaw   = tune.name ?? '';
    const sourceRaw = tune.source?.name ?? '';
    const instRaw   = entry?.instrument_name ?? '';
    const tuningRaw = entry?.tuning ?? '';
    const instStr   = instRaw ? (tuningRaw ? `${instRaw} (${tuningRaw})` : instRaw) : '';
    const keyStr    = tune.key
      ? (tune.modal ? `${tune.key} modal` : tune.key)
      : (tune.modal ? 'modal' : '');
    const metaRaw   = [instStr, keyStr].filter(Boolean).join(' · ');
    const mobPills  = entry ? pillStatus(entry.status, 'mob-pill') : '';
    const mobActions = [
      hasNotes ? `<button class="action-btn btn-notes" data-tune-id="${tune.id}" data-entry-id="${entry?.id ?? ''}">📝</button>` : '',
      tune.references?.length > 0 ? `<button class="action-btn btn-show-refs" data-tune-id="${tune.id}">🔗</button>` : '',
      `<button class="action-btn btn-edit-row" data-tune-id="${tune.id}" data-entry-id="${entry?.id ?? ''}" ${unlocked ? '' : 'hidden'}>✏️</button>`,
    ].join('');

    const tr = document.createElement('tr');
    tr.innerHTML = `
      <td><span class="cell-trunc cell-name-content mob-truncatable" data-full="${esc(nameRaw)}" title="${esc(nameRaw)}">${esc(nameRaw)}</span></td>
      <td><span class="cell-trunc cell-source-content mob-truncatable" data-full="${esc(sourceRaw)}" title="${esc(sourceRaw)}">${esc(sourceRaw)}</span></td>
      <td>${esc(tune.key  ?? '')}</td>
      <td>${tune.modal ? '<span class="pill pill-yes">Yes</span>' : '<span class="pill" style="background:#222">—</span>'}</td>
      <td>${esc(entry?.instrument_name ?? '')}</td>
      <td>${esc(entry?.tuning ?? '')}</td>
      <td>${pillStatus(entry?.status)}</td>
      <td>${hasNotes
            ? `<button class="action-btn btn-notes" data-tune-id="${tune.id}" data-entry-id="${entry?.id ?? ''}">📝</button>`
            : ''}</td>
      <td>${tune.references?.length > 0
            ? `<button class="action-btn btn-show-refs" data-tune-id="${tune.id}" title="References">🔗</button>`
            : ''}</td>
      <td><button class="action-btn btn-edit-row"
                  data-tune-id="${tune.id}"
                  data-entry-id="${entry?.id ?? ''}"
                  title="Edit"
                  ${unlocked ? '' : 'hidden'}>✏️</button></td>
      <td class="mobile-row" colspan="99">
        <div class="mob-line1">
          <div class="mob-name-wrap">
            <span class="mob-name mob-truncatable" data-full="${esc(nameRaw)}" title="${esc(nameRaw)}">${esc(nameRaw)}</span>
            ${sourceRaw ? `<span class="mob-source mob-truncatable" data-full="${esc(sourceRaw)}" title="${esc(sourceRaw)}">(${esc(sourceRaw)})</span>` : ''}
          </div>
          <span class="mob-status">${mobPills}</span>
        </div>
        <div class="mob-line2">
          <span class="mob-meta mob-truncatable" data-full="${esc(metaRaw)}" title="${esc(metaRaw)}">${esc(metaRaw)}</span>
          <span class="mob-actions">${mobActions}</span>
        </div>
      </td>`;
    tbody.appendChild(tr);
  });

  tbody.querySelectorAll('.btn-notes').forEach(b =>
    b.addEventListener('click', () => openNotesModal(+b.dataset.tuneId, b.dataset.entryId ? +b.dataset.entryId : null)));
  tbody.querySelectorAll('.btn-edit-row').forEach(b =>
    b.addEventListener('click', () => openEdit(+b.dataset.tuneId, b.dataset.entryId ? +b.dataset.entryId : null)));
  tbody.querySelectorAll('.btn-show-refs').forEach(b =>
    b.addEventListener('click', () => openRefsModal(+b.dataset.tuneId)));
}

function pillBool(val, warnIfTrue = false, neutralIfTrue = false) {
  if (val === null || val === undefined) return '<span class="pill" style="background:#222">—</span>';
  if (val === true) {
    if (neutralIfTrue || warnIfTrue) return '<span class="pill pill-warn">Yes</span>';
    return '<span class="pill pill-yes">Yes</span>';
  }
  return '<span class="pill pill-no">No</span>';
}

function pillStatus(status, extraClass = '') {
  const c = extraClass ? ' ' + extraClass : '';
  if (status === 'callable')  return `<span class="pill pill-yes${c}">Callable</span>`;
  if (status === 'review')    return `<span class="pill pill-warn${c}">Needs Review</span>`;
  if (status === 'to_learn')  return `<span class="pill pill-to-learn${c}">To Learn</span>`;
  return `<span class="pill pill-dim${c}">—</span>`;
}

// ── Add / Edit modal ──────────────────────────────────────────
btnAddTune.addEventListener('click', openAdd);

function openAdd() {
  editingTuneId  = null;
  editingEntryId = null;
  $('modal-title').textContent = 'Add tune';
  tuneForm.reset();
  refsList.innerHTML = '';
  sourceInput.value  = '';
  populateInstrumentSelect();
  instrumentSelect.value = '';
  btnDeleteTune.hidden = true;
  btnEditNotes.hidden  = true;
  tuneModal.showModal();
}

function openEdit(tuneId, entryId) {
  editingTuneId  = tuneId;
  editingEntryId = entryId;

  const tune  = allTunes.find(t => t.id === tuneId);
  const entry = entryId ? tune?.instruments.find(e => e.id === entryId) : null;

  $('modal-title').textContent = `Edit: ${tune?.name ?? ''}`;
  tuneForm.reset();

  tuneForm.elements.name.value    = tune?.name  ?? '';
  tuneForm.elements.key.value     = tune?.key   ?? '';
  tuneForm.elements.modal.checked = !!tune?.modal;
  sourceInput.value = tune?.source?.name ?? '';

  // Instrument entry
  populateInstrumentSelect(entry?.instrument_id ?? null);
  if (entry) {
    tuneForm.elements.inst_tuning.value        = entry.tuning       ?? '';
    tuneForm.elements.inst_learned_from.value  = entry.learned_from ?? '';
    tuneForm.elements.inst_date_learned.value  = entry.date_learned ?? '';
    tuneForm.elements.inst_status.value        = entry.status ?? '';
    tuneForm.elements.inst_difficulty.value    = entry.difficulty   ?? '';
  }

  // References
  refsList.innerHTML = '';
  (tune?.references ?? []).forEach(r => addRefRow(r.link, r.site?.name ?? '', r.id, r.site_id, r.musicians ?? []));

  btnDeleteTune.hidden = false;
  btnEditNotes.hidden  = false;
  tuneModal.showModal();
}

// ── Musician chip picker (shared by ref rows + bulk form) ──────
function makeMusicianPicker(initialMusicians = []) {
  let musicians = initialMusicians.map(m => ({ id: m.id, name: m.name }));

  const el       = document.createElement('div');
  el.className   = 'ref-musicians-row';
  el.innerHTML   = `<span class="ref-musician-chips"></span>
    <span class="autocomplete-row">
      <input type="text" placeholder="Musician" class="ref-musician-input"
             list="musician-list" autocomplete="off" />
      <button type="button" class="quick-add-btn btn-add-ref-musician" title="Add musician">+</button>
    </span>`;

  const chipsEl = el.querySelector('.ref-musician-chips');
  const input   = el.querySelector('.ref-musician-input');
  const btnPlus = el.querySelector('.btn-add-ref-musician');

  function refresh() {
    chipsEl.innerHTML = '';
    musicians.forEach(m => {
      const chip = document.createElement('span');
      chip.className = 'musician-chip';
      chip.innerHTML = `${esc(m.name)}<button type="button" class="chip-remove" title="Remove">✕</button>`;
      chip.querySelector('.chip-remove').addEventListener('click', () => {
        musicians = musicians.filter(x => x.id !== m.id);
        refresh();
      });
      chipsEl.appendChild(chip);
    });
  }

  function addByName(name) {
    name = name.trim();
    if (!name) return false;
    const found = allMusicians.find(m => m.name.toLowerCase() === name.toLowerCase());
    if (!found || musicians.some(m => m.id === found.id)) return false;
    musicians.push({ id: found.id, name: found.name });
    input.value = '';
    refresh();
    return true;
  }

  attachTabAutocomplete(input, musicianDatalist);

  input.addEventListener('keydown', e => {
    if (e.key === 'Enter') { e.preventDefault(); addByName(input.value); }
  });

  btnPlus.addEventListener('click', async () => {
    if (addByName(input.value)) return;
    const item = await quickAdd('/musicians/', 'New musician name:', allMusicians, musicianDatalist);
    if (item) { musicians.push({ id: item.id, name: item.name }); refresh(); }
  });

  refresh();

  return {
    el,
    getMusicians: () => musicians.map(m => ({ id: m.id })),
    reset: ()    => { musicians = []; input.value = ''; refresh(); },
  };
}

// ── Reference rows ────────────────────────────────────────────
$('btn-add-ref').addEventListener('click', () => addRefRow());

function addRefRow(link = '', site = '', refId = null, siteId = null, initialMusicians = []) {
  const row = document.createElement('div');
  row.className = 'ref-row';
  row.dataset.refId  = refId  ?? '';
  row.dataset.siteId = siteId ?? '';
  const siteOptions = allReferenceSites
    .map(s => `<option value="${s.id}"${s.id === siteId ? ' selected' : ''}>${esc(s.name)}</option>`)
    .join('');
  row.innerHTML = `<input type="text" placeholder="URL" value="${esc(link)}" class="ref-link" />
                   <span class="autocomplete-row ref-site-wrap">
                     <select class="ref-site"><option value="">— site —</option>${siteOptions}</select>
                     <button type="button" class="quick-add-btn btn-quick-add-ref-site" title="Add new site">+</button>
                   </span>
                   <button type="button" class="remove-btn">✕</button>`;
  row.querySelector('.remove-btn').addEventListener('click', () => row.remove());
  row.querySelector('.btn-quick-add-ref-site').addEventListener('click', async () => {
    const item = await quickAdd('/reference_sites/', 'New site name:', allReferenceSites, null);
    if (item) {
      const sel = row.querySelector('.ref-site');
      const opt = document.createElement('option');
      opt.value = item.id;
      opt.textContent = item.name;
      sel.appendChild(opt);
      sel.value = item.id;
    }
  });
  const picker = makeMusicianPicker(initialMusicians);
  row.appendChild(picker.el);
  row._getMusicians = picker.getMusicians;
  refsList.appendChild(row);
}

// ── Save ──────────────────────────────────────────────────────
$('btn-save-tune').addEventListener('click', saveTune);
$('btn-cancel').addEventListener('click', () => tuneModal.close());

async function saveTune() {
  const f = tuneForm.elements;

  const tuneBody = {
    name:      f.name.value  || null,
    key:       f.key.value   || null,
    modal:     f.modal.checked,
    source_id: resolveSourceId(sourceInput.value),
  };

  const instId    = instrumentSelect.value ? parseInt(instrumentSelect.value) : null;
  const instBody  = instId ? {
    instrument_id:   instId,
    tuning_id:       resolveTuningId(f.inst_tuning.value),
    learned_from_id: resolveMusicianId(f.inst_learned_from.value),
    date_learned:    f.inst_date_learned.value || null,
    status:          f.inst_status.value || null,
    difficulty:      f.inst_difficulty.value   || null,
  } : null;

  const references = [...refsList.querySelectorAll('.ref-row')]
    .map(row => ({
      link:      row.querySelector('.ref-link').value.trim() || null,
      site_id:   row.querySelector('.ref-site').value ? parseInt(row.querySelector('.ref-site').value) : null,
      musicians: row._getMusicians ? row._getMusicians() : [],
    }))
    .filter(r => r.link || r.site_id);

  try {
    let tuneId = editingTuneId;

    if (tuneId === null) {
      // Create tune
      const created = await apiFetch('/tunes/', {
        method: 'POST',
        body: JSON.stringify({ ...tuneBody, references }),
      });
      tuneId = created.id;
      // Add instrument entry if selected
      if (instBody) {
        await apiFetch(`/tunes/${tuneId}/instruments`, {
          method: 'POST', body: JSON.stringify(instBody),
        });
      }
    } else {
      // Update tune core
      await apiFetch(`/tunes/${tuneId}`, { method: 'PATCH', body: JSON.stringify(tuneBody) });
      // Update or create instrument entry
      if (instBody) {
        if (editingEntryId) {
          await apiFetch(`/tunes/${tuneId}/instruments/${editingEntryId}`, {
            method: 'PATCH', body: JSON.stringify(instBody),
          });
        } else {
          await apiFetch(`/tunes/${tuneId}/instruments`, {
            method: 'POST', body: JSON.stringify(instBody),
          });
        }
      }
    }

    tuneModal.close();
    await loadAll();
  } catch (e) {
    setStatus(e.message, true);
  }
}

// ── Delete ────────────────────────────────────────────────────
btnEditNotes.addEventListener('click', () => {
  tuneModal.close();
  openNotesModal(editingTuneId, editingEntryId);
});

btnDeleteTune.addEventListener('click', async () => {
  const tune = allTunes.find(t => t.id === editingTuneId);
  if (!confirm(`Delete "${tune?.name ?? editingTuneId}" and all its data?`)) return;
  try {
    await apiFetch(`/tunes/${editingTuneId}`, { method: 'DELETE' });
    tuneModal.close();
    await loadAll();
  } catch (e) {
    setStatus(e.message, true);
  }
});

// ── Notes modal ───────────────────────────────────────────────
async function openNotesModal(tuneId, entryId) {
  notesTuneId  = tuneId;
  notesEntryId = entryId;

  const tune  = allTunes.find(t => t.id === tuneId);
  const entry = entryId ? tune?.instruments.find(e => e.id === entryId) : null;

  $('notes-modal-title').textContent = `Notes — ${tune?.name ?? ''}`;
  $('inst-notes-heading').textContent = entry
    ? `${entry.instrument_name} notes`
    : 'Instrument notes';
  $('inst-notes-section').hidden = !entry;

  renderTuneNotes(tune?.notes ?? []);
  renderInstNotes(entry?.notes ?? []);

  $('btn-add-tune-note').hidden = !unlocked;
  $('btn-add-inst-note').hidden = !unlocked || !entry;

  notesModal.showModal();
}

function renderTuneNotes(notes) {
  const list = $('tune-notes-list');
  list.innerHTML = '';
  notes.forEach(n => {
    const row = document.createElement('div');
    row.className = 'note-row';
    row.innerHTML = `<span class="note-text">${esc(n.note)}</span>
      <span class="note-edit-controls" ${unlocked ? '' : 'hidden'}>
        <button class="action-btn btn-edit-note" data-id="${n.id}">✏️</button>
        <button class="action-btn btn-delete-note remove-btn" data-id="${n.id}">✕</button>
      </span>`;
    row.querySelector('.btn-edit-note')?.addEventListener('click', () => editTuneNote(n));
    row.querySelector('.btn-delete-note')?.addEventListener('click', () => deleteTuneNote(n.id));
    list.appendChild(row);
  });
}

function renderInstNotes(notes) {
  const list = $('inst-notes-list');
  list.innerHTML = '';
  notes.forEach(n => {
    const row = document.createElement('div');
    row.className = 'note-row';
    row.innerHTML = `<span class="note-text">${esc(n.note)}</span>
      <span class="note-edit-controls" ${unlocked ? '' : 'hidden'}>
        <button class="action-btn btn-edit-note" data-id="${n.id}">✏️</button>
        <button class="action-btn btn-delete-note remove-btn" data-id="${n.id}">✕</button>
      </span>`;
    row.querySelector('.btn-edit-note')?.addEventListener('click', () => editInstNote(n));
    row.querySelector('.btn-delete-note')?.addEventListener('click', () => deleteInstNote(n.id));
    list.appendChild(row);
  });
}

$('btn-add-tune-note').addEventListener('click', async () => {
  const text = prompt('Note:');
  if (!text) return;
  try {
    await apiFetch(`/tunes/${notesTuneId}/notes`, { method: 'POST', body: JSON.stringify({ note: text }) });
    await reloadNotesModal();
  } catch (e) { setStatus(e.message, true); }
});

$('btn-add-inst-note').addEventListener('click', async () => {
  const text = prompt('Note:');
  if (!text) return;
  try {
    await apiFetch(`/tunes/${notesTuneId}/instruments/${notesEntryId}/notes`,
                   { method: 'POST', body: JSON.stringify({ note: text }) });
    await reloadNotesModal();
  } catch (e) { setStatus(e.message, true); }
});

async function editTuneNote(n) {
  const text = prompt('Edit note:', n.note);
  if (text === null) return;
  try {
    await apiFetch(`/tunes/${notesTuneId}/notes/${n.id}`,
                   { method: 'PATCH', body: JSON.stringify({ note: text }) });
    await reloadNotesModal();
  } catch (e) { setStatus(e.message, true); }
}

async function deleteTuneNote(noteId) {
  if (!confirm('Delete this note?')) return;
  try {
    await apiFetch(`/tunes/${notesTuneId}/notes/${noteId}`, { method: 'DELETE' });
    await reloadNotesModal();
  } catch (e) { setStatus(e.message, true); }
}

async function editInstNote(n) {
  const text = prompt('Edit note:', n.note);
  if (text === null) return;
  try {
    await apiFetch(`/tunes/${notesTuneId}/instruments/${notesEntryId}/notes/${n.id}`,
                   { method: 'PATCH', body: JSON.stringify({ note: text }) });
    await reloadNotesModal();
  } catch (e) { setStatus(e.message, true); }
}

async function deleteInstNote(noteId) {
  if (!confirm('Delete this note?')) return;
  try {
    await apiFetch(`/tunes/${notesTuneId}/instruments/${notesEntryId}/notes/${noteId}`,
                   { method: 'DELETE' });
    await reloadNotesModal();
  } catch (e) { setStatus(e.message, true); }
}

async function reloadNotesModal() {
  await loadAll();
  const tune  = allTunes.find(t => t.id === notesTuneId);
  const entry = notesEntryId ? tune?.instruments.find(e => e.id === notesEntryId) : null;
  renderTuneNotes(tune?.notes ?? []);
  renderInstNotes(entry?.notes ?? []);
}

$('btn-notes-close').addEventListener('click', () => notesModal.close());

// ── References display modal ────────────────────────────────────
$('btn-refs-modal-close').addEventListener('click', () => refsModal.close());

function openRefsModal(tuneId) {
  const tune = allTunes.find(t => t.id === tuneId);
  $('refs-modal-title').textContent = `References — ${tune?.name ?? ''}`;
  refsModalList.innerHTML = '';

  const refs = tune?.references ?? [];
  if (refs.length === 0) {
    refsModalList.innerHTML = '<p style="color:var(--muted);font-size:.875rem">No references.</p>';
  } else {
    refs.forEach(r => {
      const item = document.createElement('div');
      item.className = 'refs-modal-item';
      const musicians = r.musicians?.map(m => m.name).join(', ') ?? '';
      const siteName  = r.site?.name ?? '';
      const meta      = [siteName, musicians].filter(Boolean).join(' · ');
      item.innerHTML  = `
        <a href="${esc(r.link ?? '')}" target="_blank" rel="noopener" class="ref-link-anchor">${esc(r.link ?? r.site?.name ?? 'link')}</a>
        ${meta ? `<span class="ref-meta">${esc(meta)}</span>` : ''}`;
      refsModalList.appendChild(item);
    });
  }

  refsModal.showModal();
}

// ── Call / Learn mode ────────────────────────────────────────────
const callModal = $('call-modal');
let callMode         = 'callable'; // 'callable' | 'to_learn'
let callStep         = 0;
let callInstrumentId = null;
let callTuningId     = null;

function callGetEntries() {
  const result = [];
  for (const tune of allTunes)
    for (const entry of tune.instruments)
      if (entry.status === callMode) result.push({ tune, entry });
  return result;
}

function callGetInstruments() {
  const map = new Map();
  callGetEntries().forEach(({ entry }) => {
    if (!map.has(entry.instrument_id)) map.set(entry.instrument_id, entry.instrument_name);
  });
  return [...map.entries()].map(([id, name]) => ({ id, name }))
    .sort((a, b) => a.name.localeCompare(b.name));
}

function callGetTunings() {
  const map = new Map();
  callGetEntries()
    .filter(({ entry }) => callInstrumentId === null || entry.instrument_id === callInstrumentId)
    .forEach(({ entry }) => {
      if (entry.tuning_id != null && !map.has(entry.tuning_id))
        map.set(entry.tuning_id, entry.tuning);
    });
  return [...map.entries()].map(([id, name]) => ({ id, name }))
    .sort((a, b) => a.name.localeCompare(b.name));
}

function callGetKeys() {
  const map = new Map();
  callGetEntries()
    .filter(({ entry }) =>
      (callInstrumentId === null || entry.instrument_id === callInstrumentId) &&
      (callTuningId === null     || entry.tuning_id    === callTuningId)
    )
    .forEach(({ tune }) => {
      if (tune.key) {
        const k = tune.key + '|' + (tune.modal ? '1' : '0');
        if (!map.has(k)) map.set(k, { key: tune.key, modal: !!tune.modal });
      }
    });
  return [...map.values()]
    .sort((a, b) => a.key.localeCompare(b.key) || (a.modal ? 1 : -1));
}

function openCallModal(mode) {
  callMode = mode;
  callStep = 0;
  callInstrumentId = null;
  callTuningId = null;
  renderCallStep();
  // showModal() is called inside renderCallStep() only when there are
  // multiple options to show — if everything auto-skipped the modal
  // never opens and the filter is applied instantly.
}

function renderCallStep() {
  const items = callStep === 0 ? callGetInstruments()
              : callStep === 1 ? callGetTunings()
              : callGetKeys();

  // Auto-advance if only one option
  if (items.length === 1) {
    callSelect(callStep === 2 ? items[0].key : items[0].id,
               callStep === 2 ? items[0].modal : null);
    return;
  }

  // Multiple options — open the modal now if not already open
  if (!callModal.open) callModal.showModal();

  $('call-title').textContent = ['Instrument', 'Tuning', 'Key'][callStep];
  $('call-back').hidden = callStep === 0;
  const opts  = $('call-options');
  opts.innerHTML = '';
  const allBtn = document.createElement('button');
  allBtn.className = 'call-option-btn call-all-btn';
  allBtn.textContent = 'All';
  allBtn.addEventListener('click', () => callSelect(null, null));
  opts.appendChild(allBtn);
  items.forEach(item => {
    const btn = document.createElement('button');
    btn.className = 'call-option-btn';
    btn.textContent = callStep === 2
      ? (item.modal ? item.key + ' modal' : item.key)
      : item.name;
    btn.addEventListener('click', () =>
      callSelect(callStep === 2 ? item.key : item.id,
                 callStep === 2 ? item.modal : null));
    opts.appendChild(btn);
  });
}

function callSelect(value, modal) {
  if (callStep === 0) {
    callInstrumentId = value;
    callStep = 1;
    renderCallStep();
  } else if (callStep === 1) {
    callTuningId = value;
    callStep = 2;
    renderCallStep();
  } else {
    filters.status     = callMode;
    filters.instrument = callInstrumentId !== null ? String(callInstrumentId) : null;
    filters.tuning     = callTuningId     !== null ? String(callTuningId)     : null;
    filters.key        = value;
    filters.modal      = value !== null ? modal : null;
    updateFilterIndicators();
    renderTable();
    callModal.close();
  }
}

$('btn-call').addEventListener('click',  () => openCallModal('callable'));
$('btn-learn').addEventListener('click', () => openCallModal('to_learn'));
$('call-close').addEventListener('click', () => callModal.close());
$('call-back').addEventListener('click', () => {
  callStep--;
  if (callStep === 0) callInstrumentId = null;
  else if (callStep === 1) callTuningId = null;
  renderCallStep();
});

// ── Bulk Edit ──────────────────────────────────────────────
btnBulkEdit.addEventListener('click', e => {
  e.stopPropagation();
  if (!bulkEditPopover.hidden) { bulkEditPopover.hidden = true; return; }
  const rect = btnBulkEdit.getBoundingClientRect();
  bulkEditPopover.style.top   = (rect.bottom + 4) + 'px';
  bulkEditPopover.style.right = (window.innerWidth - rect.right) + 'px';
  bulkEditPopover.hidden = false;
});

document.addEventListener('click', e => {
  if (!bulkEditPopover.hidden && !bulkEditPopover.contains(e.target) && e.target !== btnBulkEdit) {
    bulkEditPopover.hidden = true;
  }
});

$('btn-open-bulk-refs').addEventListener('click', () => {
  bulkEditPopover.hidden = true;
  openBulkRefsModal();
});

$('btn-bulk-refs-close').addEventListener('click', () => bulkRefsModal.close());

['bulk-refs-search', 'bulk-refs-instrument', 'bulk-refs-source',
 'bulk-refs-has-refs', 'bulk-refs-sort'].forEach(id => {
  const el = $(id);
  el.addEventListener('input',  renderBulkRefsList);
  el.addEventListener('change', renderBulkRefsList);
});

function openBulkRefsModal() {
  const instSel = $('bulk-refs-instrument');
  instSel.innerHTML = '<option value="">All instruments</option>';
  allInstruments.forEach(i => {
    const opt = document.createElement('option');
    opt.value = i.id;
    opt.textContent = i.name;
    instSel.appendChild(opt);
  });

  const srcSel = $('bulk-refs-source');
  srcSel.innerHTML = '<option value="">All sources</option>';
  allSources.forEach(s => {
    const opt = document.createElement('option');
    opt.value = s.id;
    opt.textContent = s.name;
    srcSel.appendChild(opt);
  });

  renderBulkRefsList();
  bulkRefsModal.showModal();
}

function getBulkRefsFiltered() {
  const search  = $('bulk-refs-search').value.toLowerCase();
  const instId  = $('bulk-refs-instrument').value;
  const srcId   = $('bulk-refs-source').value;
  const hasRefs = $('bulk-refs-has-refs').value;
  const sortKey = $('bulk-refs-sort').value;

  let tunes = allTunes.filter(t => {
    if (search && !(t.name ?? '').toLowerCase().includes(search)) return false;
    if (srcId  && t.source_id !== parseInt(srcId))  return false;
    if (instId && !t.instruments.some(e => e.instrument_id === parseInt(instId))) return false;
    if (hasRefs === 'no'  && t.references.length > 0) return false;
    if (hasRefs === 'yes' && t.references.length === 0) return false;
    return true;
  });

  tunes = [...tunes].sort((a, b) => {
    if (sortKey === 'newest') {
      const diff = (b.created_at || '') > (a.created_at || '') ? 1
                 : (b.created_at || '') < (a.created_at || '') ? -1 : 0;
      return diff !== 0 ? diff : b.id - a.id;
    }
    if (sortKey === 'oldest') {
      const diff = (a.created_at || '') > (b.created_at || '') ? 1
                 : (a.created_at || '') < (b.created_at || '') ? -1 : 0;
      return diff !== 0 ? diff : a.id - b.id;
    }
    if (sortKey === 'name_desc') return (b.name ?? '').localeCompare(a.name ?? '');
    return (a.name ?? '').localeCompare(b.name ?? '');
  });

  return tunes;
}

function renderBulkRefsList() {
  const tunes = getBulkRefsFiltered();
  bulkRefsList.innerHTML = '';

  if (tunes.length === 0) {
    bulkRefsList.innerHTML = '<p class="bulk-refs-empty">No tunes match the current filters.</p>';
    return;
  }

  tunes.forEach(tune => {
    const row = document.createElement('div');
    row.className = 'bulk-tune-row';
    row.dataset.tuneId = tune.id;

    const instruments = tune.instruments.map(e => e.instrument_name).filter(Boolean).join(', ');
    const refCount    = tune.references.length;
    const refPill     = refCount > 0
      ? `<span class="pill pill-yes">${refCount} ref${refCount !== 1 ? 's' : ''}</span>`
      : `<span class="pill" style="background:#222">0</span>`;

    row.innerHTML = `
      <div class="bulk-tune-main">
        <span class="bulk-tune-name">${esc(tune.name ?? '')}</span>
        <span class="bulk-tune-meta">${[esc(tune.key ?? ''), esc(tune.source?.name ?? '')].filter(Boolean).join(' · ')}</span>
        <span class="bulk-tune-instruments">${esc(instruments)}</span>
        <span class="bulk-tune-refs">${refPill}</span>
        <button class="btn-bulk-add-ref action-btn">+ ref</button>
      </div>
      <div class="bulk-ref-form" hidden>
        <input type="text" class="bulk-ref-url" placeholder="URL" />
        <span class="autocomplete-row">
          <select class="bulk-ref-site"><option value="">— site —</option>${allReferenceSites.map(s => `<option value="${s.id}">${esc(s.name)}</option>`).join('')}</select>
          <button class="btn-bulk-quick-add-site quick-add-btn" type="button" title="Add new site">+</button>
        </span>
        <button class="btn-bulk-ref-save">Add</button>
        <button class="btn-bulk-ref-cancel remove-btn">✕</button>
        <div class="bulk-ref-musicians-mount"></div>
      </div>`;

    const form            = row.querySelector('.bulk-ref-form');
    const urlInput        = row.querySelector('.bulk-ref-url');
    const siteSel         = row.querySelector('.bulk-ref-site');
    const btnAdd          = row.querySelector('.btn-bulk-add-ref');
    const btnSave         = row.querySelector('.btn-bulk-ref-save');
    const btnCancel       = row.querySelector('.btn-bulk-ref-cancel');
    const btnQuickAddSite = row.querySelector('.btn-bulk-quick-add-site');
    const picker          = makeMusicianPicker();
    row.querySelector('.bulk-ref-musicians-mount').appendChild(picker.el);

    btnAdd.addEventListener('click', () => {
      form.hidden = !form.hidden;
      if (!form.hidden) urlInput.focus();
    });

    btnCancel.addEventListener('click', () => {
      form.hidden = true;
      urlInput.value = '';
      siteSel.value  = '';
      picker.reset();
    });

    btnQuickAddSite.addEventListener('click', async () => {
      const item = await quickAdd('/reference_sites/', 'New site name:', allReferenceSites, null);
      if (item) {
        // Add the new option to every open site select in the list
        bulkRefsList.querySelectorAll('.bulk-ref-site').forEach(sel => {
          const opt = document.createElement('option');
          opt.value = item.id;
          opt.textContent = item.name;
          sel.appendChild(opt);
        });
        siteSel.value = item.id;
      }
    });

    const submitRef = async () => {
      const link      = urlInput.value.trim();
      const siteId    = siteSel.value ? parseInt(siteSel.value) : null;
      const musicians = picker.getMusicians();
      if (!link && !siteId) return;
      btnSave.disabled = true;
      try {
        await apiFetch(`/tunes/${tune.id}/references`, {
          method: 'POST',
          body: JSON.stringify({ link: link || null, site_id: siteId, musicians }),
        });
        await loadAll();
        renderBulkRefsList();
      } catch (e) {
        setStatus(e.message, true);
        btnSave.disabled = false;
      }
    };

    btnSave.addEventListener('click', submitRef);
    urlInput.addEventListener('keydown', e => {
      if (e.key === 'Enter')  submitRef();
      if (e.key === 'Escape') btnCancel.click();
    });

    bulkRefsList.appendChild(row);
  });
}

// ── Utility ───────────────────────────────────────────────────
function esc(str) {
  if (str === null || str === undefined) return '';
  return String(str)
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;');
}

// ── Mobile truncation tooltip ───────────────────────────────────
{
  const tip = $('mob-tooltip');
  let   timer = null;

  tbody.addEventListener('click', e => {
    const el = e.target.closest('.mob-truncatable');
    if (!el) return;
    if (el.scrollWidth <= el.offsetWidth) return; // not truncated
    clearTimeout(timer);
    tip.textContent = el.dataset.full;
    const rect = el.getBoundingClientRect();
    tip.style.top  = (rect.bottom + 4) + 'px';
    tip.style.left = Math.max(8, Math.min(rect.left, window.innerWidth - 220)) + 'px';
    tip.hidden = false;
    timer = setTimeout(() => { tip.hidden = true; }, 2500);
    e.stopPropagation();
  });

  document.addEventListener('click', () => { clearTimeout(timer); tip.hidden = true; });
}

// Pressing Tab in a datalist-backed input fills the top matching suggestion.
function attachTabAutocomplete(input, datalist) {
  input.addEventListener('keydown', e => {
    if (e.key !== 'Tab' || !input.value) return;
    const val  = input.value.toLowerCase();
    const opts = [...datalist.options].map(o => o.value);
    const match = opts.find(o => o.toLowerCase().startsWith(val))
               ?? opts.find(o => o.toLowerCase().includes(val));
    if (match) input.value = match;
    // Don't preventDefault — Tab still moves focus normally
  });
}

attachTabAutocomplete(sourceInput,                         sourceDatalist);
attachTabAutocomplete(tuneForm.elements.inst_tuning,       tuningDatalist);
attachTabAutocomplete(tuneForm.elements.inst_learned_from, musicianDatalist);

// ── Boot ─────────────────────────────────────────────────────
loadAll();