'use strict';
// ---- Pantry (Recipes > Pantry): what you keep in the kitchen, how many are left, and the level that counts as running low. A phone can scan a barcode to add one or use one;
// the first time a barcode is seen you say which item it is (so Green Giant corn and the store brand are both "Corn"). Low items go on the shopping list in a tap.
const PA_UNITS = [['', 'each'], ['g', 'g'], ['kg', 'kg'], ['oz', 'oz'], ['lb', 'lb'], ['ml', 'ml'], ['l', 'litres'], ['tsp', 'tsp'], ['tbsp', 'tbsp'], ['cup', 'cups'], ['fl oz', 'fl oz'], ['pint', 'pints'], ['quart', 'quarts'], ['gallon', 'gallons']];
const paStep = u => ({ g: 100, ml: 100 }[u] || 1);
const paApi = (p, o) => jfetch('/api/pantry' + p, o), paOpt = o => ({ method: 'POST', headers: { 'content-type': 'application/json' }, body: JSON.stringify(o) });
const paAgo = t => { const m = Math.round((Date.now() - t) / 60000); return m < 1 ? 'just now' : m < 60 ? m + ' min ago' : m < 1440 ? Math.round(m / 60) + ' h ago' : new Date(t).toLocaleDateString(undefined, { weekday: 'short' }); };
const paRecent = r => r.length ? `<h2>Recently</h2><div class="list">${r.map(x => `<div class="row"><span class="grow"><b>${esc(x.who)}</b> ${x.delta < 0 ? 'took' : 'put back'} ${esc(x.item)}<small>${esc(paAgo(x.t))}${x.note ? ' · ' + esc(x.note) : ''}</small></span></div>`).join('')}</div>` : '';
/** The simple way to use things: a big tile for each item, tap to take one (with Undo). Children see only this. */
async function viewPantryTake() {
  let st; const v = $('#view'), kid = !!(ME && ME.kid && ME.kid.on);
  try { st = await paApi('/'); } catch (e) { v.innerHTML = `<div class="wrap"><h1>Pantry</h1><p class="err">${esc(e.message)}</p></div>`; return; }
  if (!location.hash.startsWith('#/recipes')) return;
  const draw = () => {
    v.innerHTML = `<div class="wrap"><div class="ptop"><h1>${kid ? 'Pantry' : 'Take one'}</h1><span class="grow"></span>${kid ? '' : `<a class="btn ghost" href="#/recipes/pantry">Manage</a>`}</div>
      <p class="sub" style="margin-top:0">Tap what you are taking. It counts one off so the family knows when to buy more.</p>
      <div class="paTiles">${st.items.filter(x => !kid || !x.unit).map(x => `<button type="button" class="paTile${x.qty === 0 ? ' out' : ''}${x.isLow && x.qty ? ' low' : ''}" data-u="${esc(x.id)}"${x.qty === 0 ? ' disabled' : ''} aria-label="${x.unit ? 'Use some ' : 'Take one '}${esc(x.name)}${x.qty != null ? ', ' + x.label + ' left' : ''}"><b>${esc(x.name)}</b><small>${x.qty == null ? '' : x.qty === 0 ? 'none left' : x.label + ' left'}</small></button>`).join('') || '<p class="empty">Nothing in the pantry yet.</p>'}</div>
      <div class="bar" style="justify-content:flex-start"><button class="btn ghost" id="pasuse">${icon('plus')}Scan a barcode instead</button></div>${paRecent(st.recent || [])}</div>`;
    v.querySelectorAll('[data-u]').forEach(b => b.onclick = async () => { const own = st.items.find(x => x.id === b.dataset.u); if (own && own.unit) return paUseSome(own, list => { st.items = list.items; st.recent = list.recent; draw(); }); b.disabled = true; try { const r = await paApi('/use', paOpt({ id: b.dataset.u })); st.items = r.items; st.recent = r.recent; draw(); const it = r.item;
      toast(`Took one ${it.name}${it.qty != null ? ': ' + it.qty + ' left' : ''}`, { label: 'Undo', run: async () => { try { const u = await paApi('/use', paOpt({ id: it.id, undo: true })); st.items = u.items; st.recent = u.recent; if ($('.paTiles')) draw(); toast('Put back'); } catch (e) { toast(e.message); } } }); } catch (e) { b.disabled = false; toast(e.message); } });
    $('#pasuse').onclick = () => pantryScan('use', list => { st.items = list; draw(); }, () => st.items);
  };
  draw();
}
async function viewPantry(sub) {
  if (sub === 'take' || (ME && ME.kid && ME.kid.on)) return viewPantryTake();
  let items = [], recent = []; const v = $('#view');
  try { const r = await paApi('/'); items = r.items; recent = r.recent || []; } catch (e) { v.innerHTML = `<div class="wrap"><h1>Pantry</h1><p class="err">${esc(e.message)}</p></div>`; return; }
  if (!location.hash.startsWith('#/recipes/pantry')) return;
  const draw = () => {
    v.innerHTML = `<div class="wrap"><div class="ptop"><h1>Recipes</h1></div>${typeof rcTabs === 'function' ? rcTabs('pantry') : ''}
      <div class="bar" style="justify-content:flex-start"><a class="btn" href="#/recipes/pantry/take">Take one</a><button class="btn ghost" id="pasadd">${icon('plus')}Scan to add</button><button class="btn ghost" id="pasuse">Scan to use one</button></div>
      <form id="paf" class="bar" style="flex-wrap:nowrap;gap:6px"><input type="text" id="pan" placeholder="Add an item" autocomplete="off" required style="flex:2;min-width:0"><input type="number" id="paq" placeholder="How many" min="0" step="any" inputmode="decimal" style="flex:1;min-width:0" aria-label="How many are left"><select id="pau" aria-label="Unit" style="flex:1;min-width:0">${PA_UNITS.map(u => `<option value="${esc(u[0])}">${esc(u[1])}</option>`).join('')}</select><input type="number" id="paw" placeholder="Low at" min="0" step="any" inputmode="decimal" style="flex:1;min-width:0" aria-label="Counts as running low at"><button class="btn">Add</button></form>
      <div class="list">${items.map(x => `<div class="row"><span class="grow" style="white-space:normal"><b>${esc(x.name)}</b>${x.isLow ? ' <small style="color:var(--danger)">running low</small>' : ''}<small>${x.qty == null ? 'not counted' : x.label + ' left'}${x.low != null ? ' · low at ' + x.lowLabel : ''}${x.codes.length ? ' · ' + x.codes.length + ' barcode' + (x.codes.length === 1 ? '' : 's') : ''}</small></span>
        ${x.isLow && typeof rcApi === 'function' ? `<button class="btn ghost" data-shop="${esc(x.id)}" style="min-height:36px">To shopping</button>` : ''}${x.codes.length ? `<button class="ibtn" data-bc="${esc(x.id)}" aria-label="Barcodes for ${esc(x.name)}" title="Barcodes">${icon('list')}</button>` : ''}${x.qty != null && x.unit ? `<button class="btn ghost" data-some="${esc(x.id)}" style="min-height:36px">Use some</button>` : ''}${x.qty != null ? `<button class="ibtn" data-d="${esc(x.id)}:-${paStep(x.unit)}" aria-label="Less ${esc(x.name)}">−</button><button class="ibtn" data-d="${esc(x.id)}:${paStep(x.unit)}" aria-label="More ${esc(x.name)}">+</button>` : ''}<button class="ibtn" data-x="${esc(x.id)}" aria-label="Remove ${esc(x.name)}">${icon('trash')}</button></div>`).join('') || '<div class="row"><span class="grow"><small>Nothing yet. Add what you keep in the kitchen, or scan a barcode.</small></span></div>'}</div>
      <p class="sub" style="margin-top:12px">Counts are kept by hand (and by scanning); they do not go down when you cook. The meal plan points out ingredients you already have.</p>${paRecent(recent)}</div>`;
    const go = async (p, o) => { try { items = (await paApi(p, paOpt(o))).items; draw(); } catch (e) { toast(e.message); } };
    $('#paf').onsubmit = e => { e.preventDefault(); go('/item', { name: $('#pan').value, qty: $('#paq').value, unit: $('#pau').value, low: $('#paw').value }); };
    v.querySelectorAll('[data-some]').forEach(b => b.onclick = () => paUseSome(items.find(x => x.id === b.dataset.some), r => { items = r.items; recent = r.recent || recent; draw(); }));
    v.querySelectorAll('[data-d]').forEach(b => b.onclick = () => { const i = b.dataset.d.lastIndexOf(':'); go('/adjust', { id: b.dataset.d.slice(0, i), delta: +b.dataset.d.slice(i + 1) }); });
    v.querySelectorAll('[data-x]').forEach(b => b.onclick = () => go('/delete', { id: b.dataset.x }));
    v.querySelectorAll('[data-shop]').forEach(b => b.onclick = async () => { const it = items.find(x => x.id === b.dataset.shop); try { await rcApi('/shopping/add', rcOpt('POST', { text: it.name })); toast(it.name + ' added to the shopping list'); } catch (e) { toast(e.message); } });
    v.querySelectorAll('[data-bc]').forEach(b => b.onclick = () => { const it = items.find(x => x.id === b.dataset.bc), el = openSheet('Barcodes for ' + it.name, 'Scanning any of these counts as ' + it.name + '.', `<div class="list">${it.codes.map(c => `<div class="row"><span class="grow"><b>${esc(c)}</b></span><button class="ibtn" data-u="${esc(c)}" aria-label="Unlink ${esc(c)}">${icon('trash')}</button></div>`).join('')}</div>`); el.querySelectorAll('[data-u]').forEach(u => u.onclick = async () => { closeSheet(); go('/unlink', { id: it.id, code: u.dataset.u }); }); });
    $('#pasadd').onclick = () => pantryScan('add', list => { items = list; draw(); }, () => items); $('#pasuse').onclick = () => pantryScan('use', list => { items = list; draw(); }, () => items);
  };
  draw();
}

/** The scanner: the camera looks for barcodes and each one found adds one (or uses one). Keeps going so a bag of shopping can be done in a row. */
let paZx = null;
const paLoadZx = () => paZx || (paZx = new Promise((ok, no) => { if (window.ZXing) return ok(window.ZXing); const s = document.createElement('script'); s.src = '/vendor/zxing/zxing.min.js'; s.onload = () => ok(window.ZXing); s.onerror = () => { paZx = null; no(new Error('Could not load the scanner')); }; document.head.appendChild(s); }));
function pantryScan(mode, onChange, getItems) {
  const el = openSheet(mode === 'use' ? 'Scan to use one' : 'Scan to add', mode === 'use' ? 'Each barcode takes one off the count.' : 'Each barcode adds one to the count.', `<video id="pscv" playsinline muted autoplay style="width:100%;border-radius:12px;background:#000;aspect-ratio:4/3;object-fit:cover"></video>
    <p class="sub" id="pscs" role="status" style="margin:8px 0">Starting the camera…</p><div id="pscq"></div>
    <form id="pscm" class="bar" style="flex-wrap:nowrap;gap:6px"><input type="text" id="pscn" inputmode="numeric" placeholder="Or type the barcode number" autocomplete="off" aria-label="Barcode number" style="flex:1;min-width:0"><button class="btn ghost">Go</button></form>`);
  const video = el.querySelector('#pscv'), status = t => { const s = el.querySelector('#pscs'); if (s) s.textContent = t; };
  let stream = null, stopped = false, busy = false, last = '', lastAt = 0, reader = null, timer = 0;
  const stop = () => { stopped = true; clearInterval(timer); try { reader && reader.reset(); } catch { /* not started */ } if (stream) stream.getTracks().forEach(t => t.stop()); };
  const alive = () => !stopped && el.isConnected;
  const resume = () => { busy = false; if (alive()) { el.querySelector('#pscq').innerHTML = ''; status('Point the camera at a barcode'); } };
  const finish = (r, said) => { onChange(r.items); status(said); toast(said); try { navigator.vibrate && navigator.vibrate(60); } catch { /* no vibration */ } setTimeout(resume, 1300); };
  const found = async code => {
    if (busy || !alive() || (code === last && Date.now() - lastAt < 4000)) return; busy = true; last = code; lastAt = Date.now(); status('Looking up ' + code + '…');
    try {
      const r = await paApi('/lookup?code=' + code); if (!alive()) return;
      if (r.linked) { const o = await paApi('/scan', paOpt({ code, mode })); return finish(o, `${o.item.name}: ${o.item.qty} left${o.item.isLow ? ' (running low)' : ''}`); }
      const list = (getItems() || []), matches = (r.matches || []).map(m => m.id), sorted = [...list.filter(x => matches.includes(x.id)), ...list.filter(x => !matches.includes(x.id))];
      el.querySelector('#pscq').innerHTML = `<form id="pscf"><p style="margin:0 0 6px"><b>${esc(r.product ? r.product.name : 'Barcode ' + code)}</b>${r.product && r.product.brand ? ' <small>· ' + esc(r.product.brand) + '</small>' : ''}</p>
        ${!r.product ? `<p class="sub" style="margin:0 0 6px">${r.lookedUp ? 'The product database does not know this one.' : 'Could not reach the product database.'} Say what it is once and it is remembered.</p>` : '<p class="sub" style="margin:0 0 6px">First time this barcode is seen. Which item is it?</p>'}
        <label for="pscw">Which item</label><select id="pscw">${sorted.map(x => `<option value="${esc(x.id)}">${esc(x.name)}</option>`).join('')}<option value=""${matches.length ? '' : ' selected'}>A new item…</option></select>
        <div id="pscnw"${matches.length ? ' hidden' : ''}><label for="pscnn">Name of the new item</label><input type="text" id="pscnn" value="${esc(r.product ? r.product.short : '')}" autocomplete="off" maxlength="60"></div>
        <div class="bar"><button type="button" class="btn ghost" id="pscx" style="flex:1;justify-content:center">Skip</button><button class="btn" style="flex:1;justify-content:center">${mode === 'use' ? 'Use one' : 'Add one'}</button></div><div class="err" id="psce"></div></form>`;
      const sel = el.querySelector('#pscw'), nw = el.querySelector('#pscnw'); sel.onchange = () => { nw.hidden = !!sel.value; }; if (sel.value === '' ) nw.hidden = false; status('Which item is this?');
      el.querySelector('#pscx').onclick = resume;
      el.querySelector('#pscf').onsubmit = async e => { e.preventDefault(); try { const o = await paApi('/scan', paOpt({ code, mode, itemId: sel.value || undefined, name: sel.value ? undefined : el.querySelector('#pscnn').value })); finish(o, `${o.item.name}: ${o.item.qty} left${o.made ? ' (new item)' : ''}`); } catch (er) { el.querySelector('#psce').textContent = er.message; } };
    } catch (e) { status(e.message); toast(e.message); setTimeout(resume, 1500); }
  };
  el.querySelector('#pscm').onsubmit = e => { e.preventDefault(); const c = el.querySelector('#pscn').value.replace(/\D/g, ''); el.querySelector('#pscn').value = ''; if (/^\d{8,14}$/.test(c)) { last = ''; found(c); } else status('A barcode is 8 to 14 digits.'); };
  (async () => {
    if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) return status('This browser cannot use the camera here (it needs a secure page). Type the number instead.');
    try { stream = await navigator.mediaDevices.getUserMedia({ video: { facingMode: { ideal: 'environment' } }, audio: false }); } catch (e) { return status(e && e.name === 'NotAllowedError' ? 'The camera is blocked. Allow it for this site, or type the number instead.' : 'No camera could be started. Type the number instead.'); }
    if (!alive()) return stop(); video.srcObject = stream; try { await video.play(); } catch { /* autoplay is allowed on a tap */ } status('Point the camera at a barcode');
    if ('BarcodeDetector' in window) { // Chrome and Android have a built-in reader
      let det; try { det = new BarcodeDetector({ formats: ['ean_13', 'ean_8', 'upc_a', 'upc_e'] }); } catch { det = null; }
      if (det) { timer = setInterval(async () => { if (!alive()) return stop(); if (busy || video.readyState < 2) return; try { const r = await det.detect(video); if (r[0] && r[0].rawValue) found(r[0].rawValue); } catch { /* a frame that cannot be read */ } }, 300); return; }
    }
    try { // everything else (iPhone Safari): a reader written in JavaScript, loaded only now
      const Z = await paLoadZx(), hints = new Map(); hints.set(Z.DecodeHintType.POSSIBLE_FORMATS, [Z.BarcodeFormat.EAN_13, Z.BarcodeFormat.EAN_8, Z.BarcodeFormat.UPC_A, Z.BarcodeFormat.UPC_E]); reader = new Z.BrowserMultiFormatReader(hints);
      timer = setInterval(() => { if (!alive()) stop(); }, 500);
      reader.decodeFromVideoElement(video, (res) => { if (res && alive() && !busy) found(res.getText()); });
    } catch (e) { status(e.message + ' Type the number instead.'); }
  })();
  new MutationObserver((_, ob) => { if (!el.isConnected) { stop(); ob.disconnect(); } }).observe(document.body, { childList: true });
}

/** Use some of an item: an amount in any unit that can be turned into the item's own (4 cups of the flour that is kept in pounds). */
function paUseSome(it, done) {
  const el = openSheet('Use some ' + it.name.toLowerCase(), `${it.label} left. Any unit works if it can be turned into ${it.unit || 'a count'} (cups of flour into pounds, for instance).`, `<form id="pusf"><div class="bar" style="flex-wrap:nowrap;gap:6px"><input type="number" id="pusa" min="0" step="any" inputmode="decimal" placeholder="Amount" required style="flex:1;min-width:0"><select id="pusu" aria-label="Unit" style="flex:1;min-width:0">${PA_UNITS.map(u => `<option value="${esc(u[0])}"${u[0] === it.unit ? ' selected' : ''}>${esc(u[1])}</option>`).join('')}</select></div><div class="err" id="puse"></div><div class="bar"><button class="btn" style="flex:1;justify-content:center">Take it out</button></div></form>`);
  setTimeout(() => el.querySelector('#pusa').focus(), 80);
  el.querySelector('#pusf').onsubmit = async e => { e.preventDefault(); try { const r = await paApi('/take', paOpt({ takes: [{ id: it.id, amount: +el.querySelector('#pusa').value, unit: el.querySelector('#pusu').value }], note: 'used some' })); if (r.skipped.length) { el.querySelector('#puse').textContent = 'That cannot be turned into ' + (it.unit || 'a count') + ' for ' + it.name.toLowerCase() + '. Pick a matching unit.'; return; } closeSheet(); const d = r.done[0]; toast(`${d.name}: ${d.label || 'none'} left${d.isLow ? ' (running low)' : ''}`); done(r); } catch (er) { el.querySelector('#puse').textContent = er.message; } };
}