/* Falah Shortcodes — Client Logic */
(function () {
  'use strict';

  const cfg = window.FalahSC || {};

  // ── Prayer Times ─────────────────────────────────────────────────────────

  const prayerWidget = document.querySelector('.falah-prayer-times');
  if (prayerWidget) {
    const city    = prayerWidget.dataset.city    || cfg.prayerCity    || 'Kuala Lumpur';
    const country = prayerWidget.dataset.country || cfg.prayerCountry || 'Malaysia';
    const today   = new Date();
    const dd = String(today.getDate()).padStart(2, '0');
    const mm = String(today.getMonth() + 1).padStart(2, '0');
    const yyyy = today.getFullYear();

    fetch(`https://api.aladhan.com/v1/timingsByCity/${dd}-${mm}-${yyyy}?city=${encodeURIComponent(city)}&country=${encodeURIComponent(country)}&method=3`)
      .then(r => r.json())
      .then(data => {
        if (data.code !== 200) throw new Error('API error');
        const t = data.data.timings;
        const h = data.data.date.hijri;

        const prayers = [
          { key: 'Fajr',    label: 'Fajr'    },
          { key: 'Sunrise', label: 'Sunrise' },
          { key: 'Dhuhr',   label: 'Dhuhr'   },
          { key: 'Asr',     label: 'Asr'     },
          { key: 'Maghrib', label: 'Maghrib' },
          { key: 'Isha',    label: 'Isha'    },
        ];

        const now      = today.getHours() * 60 + today.getMinutes();
        const grid     = document.getElementById('falah-prayer-grid');
        let   nextName = '', nextTime = '';

        grid.innerHTML = prayers.map(p => {
          const raw   = t[p.key] || '';
          const parts = raw.split(' ')[0].split(':');
          const pMin  = parseInt(parts[0], 10) * 60 + parseInt(parts[1], 10);
          const isNext = !nextName && pMin > now && p.key !== 'Sunrise';
          if (isNext) { nextName = p.label; nextTime = raw.split(' ')[0]; }
          return `<div class="falah-prayer-item${isNext ? ' active' : ''}">
            <div class="falah-prayer-name">${p.label}</div>
            <div class="falah-prayer-time">${raw.split(' ')[0]}</div>
          </div>`;
        }).join('');

        const nextEl = document.getElementById('falah-next-prayer');
        if (nextEl && nextName) {
          nextEl.textContent = `⏰ Next: ${nextName} at ${nextTime}`;
        }

        const hijriEl = document.getElementById('falah-hijri');
        if (hijriEl) {
          hijriEl.textContent = `${h.day} ${h.month.en} ${h.year} AH`;
        }

        // Also update dashboard
        updateDashboardPrayer(nextName, nextTime);
      })
      .catch(() => {
        const grid = document.getElementById('falah-prayer-grid');
        if (grid) grid.innerHTML = '<div class="falah-loading"><span>Unable to load prayer times. Check your connection.</span></div>';
      });
  }

  function updateDashboardPrayer(name, time) {
    const np = document.getElementById('falah-dash-next-prayer');
    const nt = document.getElementById('falah-dash-next-time');
    if (np) np.textContent = name || '—';
    if (nt) nt.textContent = time ? `at ${time}` : '';
  }

  // ── Daily Verse ──────────────────────────────────────────────────────────

  const verseWidget = document.getElementById('falah-daily-verse');
  if (verseWidget) {
    const verseNum = parseInt(verseWidget.dataset.verse, 10) || 1;

    fetch(`https://api.alquran.cloud/v1/ayah/${verseNum}/editions/quran-uthmani,en.asad`)
      .then(r => r.json())
      .then(data => {
        if (data.code !== 200) throw new Error('API error');
        const arabic  = data.data[0];
        const english = data.data[1];

        document.getElementById('falah-verse-loading').style.display = 'none';
        const content = document.getElementById('falah-verse-content');
        content.style.display = 'block';
        document.getElementById('falah-verse-arabic').textContent      = arabic.text;
        document.getElementById('falah-verse-translation').textContent = `"${english.text}"`;
        document.getElementById('falah-verse-ref').textContent         = `Surah ${arabic.surah.englishName} (${arabic.surah.number}:${arabic.numberInSurah})`;

        // Update dashboard
        const dv = document.getElementById('falah-dash-verse');
        if (dv) dv.textContent = `${arabic.surah.englishName} ${arabic.surah.number}:${arabic.numberInSurah}`;
      })
      .catch(() => {
        const loading = document.getElementById('falah-verse-loading');
        if (loading) loading.innerHTML = '<p style="padding:24px;color:#666">Unable to load verse. Please try again.</p>';
      });
  }

  // ── Dhikr Counter ────────────────────────────────────────────────────────

  const dhikrWidget = document.getElementById('falah-dhikr-widget');
  if (dhikrWidget) {
    let list = [];
    try { list = JSON.parse(dhikrWidget.dataset.list || '[]'); } catch (e) {}

    const arabicMap = {
      'SubhanAllah':       'سُبْحَانَ اللَّهِ',
      'Alhamdulillah':     'الْحَمْدُ لِلَّهِ',
      'Allahu Akbar':      'اللَّهُ أَكْبَرُ',
      'La ilaha illallah': 'لَا إِلَٰهَ إِلَّا اللَّهُ',
      'Astaghfirullah':    'أَسْتَغْفِرُ اللَّهَ',
    };

    const storageKey = 'falah_dhikr_' + new Date().toDateString();
    let state = JSON.parse(localStorage.getItem(storageKey) || '{"idx":0,"counts":[0,0,0,0,0],"total":0}');

    const ring       = document.getElementById('falah-ring');
    const numEl      = document.getElementById('falah-counter-number');
    const targetEl   = document.getElementById('falah-counter-target');
    const arabicEl   = document.getElementById('falah-dhikr-arabic');
    const meaningEl  = document.getElementById('falah-dhikr-meaning');
    const sessionEl  = document.getElementById('falah-session-total');
    const tapBtn     = document.getElementById('falah-btn-tap');
    const resetBtn   = document.getElementById('falah-btn-reset');
    const circumference = 2 * Math.PI * 50; // r=50

    function render() {
      const d   = list[state.idx];
      const cnt = state.counts[state.idx] || 0;
      const tgt = d ? d.target : 33;
      const pct = Math.min(cnt / tgt, 1);

      numEl.textContent     = cnt;
      targetEl.textContent  = `/ ${tgt}`;
      arabicEl.textContent  = (d && arabicMap[d.text]) || '';
      meaningEl.textContent = (d && d.meaning) || '';
      ring.style.strokeDashoffset = circumference * (1 - pct);

      const total = state.counts.reduce((a, b) => a + b, 0);
      sessionEl.textContent = total > 0 ? `Session total: ${total} counts` : '';

      // Dashboard
      const dd = document.getElementById('falah-dash-dhikr-count');
      if (dd) dd.textContent = total;
    }

    function save() {
      localStorage.setItem(storageKey, JSON.stringify(state));
    }

    // Button handlers
    document.querySelectorAll('.falah-dhikr-btn').forEach(btn => {
      btn.addEventListener('click', () => {
        state.idx = parseInt(btn.dataset.index, 10);
        document.querySelectorAll('.falah-dhikr-btn').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        save();
        render();
      });
    });

    tapBtn.addEventListener('click', () => {
      const d   = list[state.idx];
      const tgt = d ? d.target : 33;
      state.counts[state.idx] = (state.counts[state.idx] || 0) + 1;
      if (state.counts[state.idx] === tgt) {
        setTimeout(() => {
          // Flash completion
          numEl.style.color = '#1a7a4a';
          setTimeout(() => { numEl.style.color = ''; }, 1000);
        }, 10);
      }
      save();
      render();
    });

    resetBtn.addEventListener('click', () => {
      state.counts[state.idx] = 0;
      save();
      render();
    });

    ring.style.strokeDasharray = circumference;
    render();
  }

  // ── Qibla Compass ────────────────────────────────────────────────────────

  const qiblaBtn = document.getElementById('falah-qibla-locate');
  if (qiblaBtn) {
    qiblaBtn.addEventListener('click', () => {
      if (!navigator.geolocation) {
        qiblaBtn.textContent = '⚠️ Geolocation not supported';
        return;
      }
      qiblaBtn.textContent = '📍 Getting location…';
      qiblaBtn.disabled = true;

      navigator.geolocation.getCurrentPosition(pos => {
        const lat = pos.coords.latitude;
        const lon = pos.coords.longitude;
        const qiblaAngle = calcQibla(lat, lon);

        document.getElementById('falah-qibla-status').style.display  = 'none';
        document.getElementById('falah-qibla-display').style.display = 'block';
        document.getElementById('falah-qibla-angle').textContent    = `Qibla: ${Math.round(qiblaAngle)}° from North`;
        document.getElementById('falah-qibla-location').textContent  = `Your location: ${lat.toFixed(4)}°, ${lon.toFixed(4)}°`;

        const needle = document.getElementById('falah-qibla-needle');

        // Try device orientation
        if (window.DeviceOrientationEvent && typeof DeviceOrientationEvent.requestPermission === 'function') {
          DeviceOrientationEvent.requestPermission().then(perm => {
            if (perm === 'granted') listenOrientation(needle, qiblaAngle);
          });
        } else if (window.DeviceOrientationEvent) {
          listenOrientation(needle, qiblaAngle);
        } else {
          needle.style.transform = `rotate(${qiblaAngle}deg)`;
        }
      }, () => {
        qiblaBtn.textContent = '⚠️ Location denied. Enable location access and try again.';
        qiblaBtn.disabled = false;
      });
    });
  }

  function listenOrientation(needle, qiblaAngle) {
    window.addEventListener('deviceorientationabsolute', e => {
      const heading = e.alpha ? (360 - e.alpha) : 0;
      needle.style.transform = `rotate(${qiblaAngle - heading}deg)`;
    }, true);
  }

  function calcQibla(lat, lon) {
    // Kaaba coordinates
    const kLat = 21.3891;
    const kLon = 39.8579;
    const φ1 = lat * Math.PI / 180;
    const φ2 = kLat * Math.PI / 180;
    const Δλ = (kLon - lon) * Math.PI / 180;
    const y   = Math.sin(Δλ) * Math.cos(φ2);
    const x   = Math.cos(φ1) * Math.sin(φ2) - Math.sin(φ1) * Math.cos(φ2) * Math.cos(Δλ);
    const θ   = Math.atan2(y, x);
    return ((θ * 180 / Math.PI) + 360) % 360;
  }

  // ── Dashboard ─────────────────────────────────────────────────────────────

  const dashDate = document.getElementById('falah-dash-date');
  if (dashDate) {
    const opts = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' };
    dashDate.textContent = new Date().toLocaleDateString('en-GB', opts);
  }

  // Hijri date on dashboard
  fetch('https://api.aladhan.com/v1/gToH?date=' + new Date().toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit', year: 'numeric' }))
    .then(r => r.json())
    .then(data => {
      const h = data?.data?.hijri;
      if (!h) return;
      const dashHijri = document.getElementById('falah-dash-hijri');
      if (dashHijri) dashHijri.textContent = `${h.day} ${h.month.en} ${h.year} AH`;
      const hijriEl = document.getElementById('falah-hijri');
      if (hijriEl) hijriEl.textContent = `${h.day} ${h.month.en} ${h.year} AH`;
    })
    .catch(() => {});

  // ── Falah Wallet ──────────────────────────────────────────────────────────

  const walletWidget = document.getElementById('falah-wallet-widget');
  if (walletWidget) {
    const balanceEl    = document.getElementById('falah-wallet-balance');
    const balanceFiat  = document.getElementById('falah-wallet-balance-fiat');
    const btnSend      = document.getElementById('falah-wallet-btn-send');
    const btnReceive   = document.getElementById('falah-wallet-btn-receive');
    const txList       = document.getElementById('falah-wallet-tx-list');
    const loginPrompt  = document.getElementById('falah-wallet-login-prompt');

    const sendModal     = document.getElementById('falah-wallet-send-modal');
    const receiveModal  = document.getElementById('falah-wallet-receive-modal');

    function openModal(el) { el.style.display = 'flex'; document.body.style.overflow = 'hidden'; }
    function closeModal(el) { el.style.display = 'none'; document.body.style.overflow = ''; }

    if (btnSend) btnSend.addEventListener('click', () => sendModal && openModal(sendModal));
    if (btnReceive) btnReceive.addEventListener('click', () => receiveModal && openModal(receiveModal));

    document.getElementById('falah-wallet-send-backdrop')?.addEventListener('click', () => closeModal(sendModal));
    document.getElementById('falah-wallet-send-close')?.addEventListener('click', () => closeModal(sendModal));
    document.getElementById('falah-wallet-receive-backdrop')?.addEventListener('click', () => closeModal(receiveModal));
    document.getElementById('falah-wallet-receive-close')?.addEventListener('click', () => closeModal(receiveModal));

    // Copy address
    document.getElementById('falah-wallet-copy-addr')?.addEventListener('click', function () {
      const addr = document.getElementById('falah-wallet-address-text')?.textContent || '';
      if (!addr) return;
      navigator.clipboard?.writeText(addr).then(() => {
        this.title = 'Copied!';
        setTimeout(() => { this.title = 'Copy address'; }, 1500);
      });
    });

    // Send form
    document.getElementById('falah-wallet-send-submit')?.addEventListener('click', function () {
      const to     = document.getElementById('falah-wallet-send-to')?.value.trim();
      const amount = parseFloat(document.getElementById('falah-wallet-send-amount')?.value);
      const errEl  = document.getElementById('falah-wallet-send-err');

      if (!to || !to.startsWith('0x') || to.length < 10) {
        if (errEl) errEl.textContent = 'Please enter a valid recipient address.';
        return;
      }
      if (!amount || amount <= 0) {
        if (errEl) errEl.textContent = 'Please enter a valid amount.';
        return;
      }
      if (errEl) errEl.textContent = '';

      // Redirect to wallet app with prefilled params
      const base = (cfg.mobileUrl || 'https://falahos.my/mobile').replace(/\/$/, '');
      const url  = `${base}/wallet/send?to=${encodeURIComponent(to)}&amount=${encodeURIComponent(amount)}`;
      window.open(url, '_blank', 'noopener,noreferrer');
      closeModal(sendModal);
    });

    // Fetch wallet data from Falah Mobile REST API
    function fetchWalletData() {
      const base = (cfg.mobileUrl || 'https://falahos.my/mobile').replace(/\/$/, '');

      fetch(`${base}/api/wallet/balance`, {
        credentials: 'include',
        headers: { 'X-WP-Nonce': cfg.nonce || '' },
      })
        .then(r => {
          if (r.status === 401 || r.status === 403) throw new Error('unauthenticated');
          if (!r.ok) throw new Error('api_error');
          return r.json();
        })
        .then(data => {
          if (balanceEl) balanceEl.textContent = (data.balance || '0') + ' ' + (data.currency || 'FLH');
          if (balanceFiat && data.fiat_value) balanceFiat.textContent = '≈ ' + data.fiat_value;
          if (btnSend) btnSend.disabled = false;
          if (btnReceive) btnReceive.disabled = false;

          // Render receive address + QR
          if (data.address) {
            const addrEl = document.getElementById('falah-wallet-address-text');
            if (addrEl) addrEl.textContent = data.address;
            const qrInner = document.getElementById('falah-wallet-qr-inner');
            if (qrInner) {
              const img = document.createElement('img');
              img.alt = 'Wallet QR Code';
              img.src = `https://api.qrserver.com/v1/create-qr-code/?data=${encodeURIComponent(data.address)}&size=160x160&margin=4`;
              img.width = 160; img.height = 160;
              qrInner.innerHTML = '';
              qrInner.appendChild(img);
            }
          }

          return fetch(`${base}/api/wallet/transactions?limit=5`, {
            credentials: 'include',
            headers: { 'X-WP-Nonce': cfg.nonce || '' },
          });
        })
        .then(r => r && r.ok ? r.json() : null)
        .then(data => {
          if (!txList || !data) return;
          const items = Array.isArray(data.transactions) ? data.transactions : [];
          txList.innerHTML = '';
          if (!items.length) {
            txList.innerHTML = '<div class="falah-wallet-tx-empty">No transactions yet</div>';
            return;
          }
          items.forEach(tx => {
            const type    = tx.type === 'sent' ? 'sent' : 'received';
            const icon    = type === 'sent' ? '↑' : '↓';
            const sign    = type === 'sent' ? '−' : '+';
            const date    = tx.date ? new Date(tx.date).toLocaleDateString('en-GB', { day: 'numeric', month: 'short' }) : '';
            const desc    = tx.description || (type === 'sent' ? 'Sent' : 'Received');
            const amount  = (tx.amount || '0') + ' ' + (tx.currency || 'FLH');

            const row = document.createElement('div');
            row.className = 'falah-wallet-tx-item';
            row.innerHTML = `
              <div class="falah-wallet-tx-icon ${type}">${icon}</div>
              <div class="falah-wallet-tx-info">
                <div class="falah-wallet-tx-desc">${escapeHtml(desc)}</div>
                <div class="falah-wallet-tx-date">${escapeHtml(date)}</div>
              </div>
              <div class="falah-wallet-tx-amount ${type}">${sign}${escapeHtml(amount)}</div>
            `;
            txList.appendChild(row);
          });
        })
        .catch(err => {
          if (err.message === 'unauthenticated') {
            if (balanceEl) balanceEl.textContent = '—';
            if (loginPrompt) loginPrompt.style.display = '';
            if (txList) txList.innerHTML = '';
          } else {
            if (balanceEl) balanceEl.textContent = '—';
            if (txList) txList.innerHTML = '<div class="falah-wallet-tx-empty">Could not load wallet. <a href="' + (cfg.mobileUrl || '') + '/wallet" target="_blank" rel="noopener">Open wallet app →</a></div>';
          }
        });
    }

    fetchWalletData();
  }

  function escapeHtml(str) {
    return String(str).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;');
  }

})();