// ===== Dashboard Feature =====
// Dashboard informatif untuk Admin dan Pengelola Rumah Ibadah

(function () {
    'use strict';

    // ── State ──────────────────────────────────────────────────────────────
    let dashboardData = null;
    let chartInstances = {};

    // ── Modal Element ──────────────────────────────────────────────────────
    const modal = document.getElementById('dashboardModal');
    if (!modal) return;

    // ── Open / Close ───────────────────────────────────────────────────────
    window.openDashboard = function () {
        modal.classList.add('show');
        loadDashboard();
    };

    window.closeDashboard = function () {
        modal.classList.remove('show');
    };

    document.getElementById('closeDashboardModal')?.addEventListener('click', window.closeDashboard);
    modal.addEventListener('click', function (e) {
        if (e.target === modal) window.closeDashboard();
    });

    // ── Load Data ──────────────────────────────────────────────────────────
    function loadDashboard() {
        const body = document.getElementById('dashboardBody');
        body.innerHTML = `
            <div class="db-loading">
                <div class="db-spinner"></div>
                <span>Memuat data dashboard…</span>
            </div>`;

        fetch('api/dashboard/stats.php')
            .then(r => r.json())
            .then(data => {
                if (data.status !== 'success') throw new Error(data.message);
                dashboardData = data;
                renderDashboard(data);
            })
            .catch(err => {
                body.innerHTML = `<div class="db-error">❌ Gagal memuat data: ${err.message}</div>`;
            });
    }

    // ── Render ─────────────────────────────────────────────────────────────
    function renderDashboard(data) {
        const { stats, distribusi, ibadah_list, ibadah_performa, recent_logs, role } = data;
        const isPengelola = role === 'pengelola';
        const ibadah = ibadah_list?.[0] ?? null;

        const body = document.getElementById('dashboardBody');

        // ── Header info ──────────────────────────────────────────────────
        let headerHtml = '';
        if (isPengelola && ibadah) {
            const emoji = (window.IBADAH_EMOJI || {})[ibadah.jenis] || '🕌';
            headerHtml = `
                <div class="db-ibadah-header">
                    <span class="db-ibadah-emoji">${emoji}</span>
                    <div>
                        <div class="db-ibadah-name">${esc(ibadah.nama)}</div>
                        <div class="db-ibadah-meta">${esc(ibadah.jenis)} &nbsp;·&nbsp; Radius ${ibadah.radius} m &nbsp;·&nbsp; ${esc(ibadah.alamat || '-')}</div>
                    </div>
                </div>`;
        }

        // ── KPI Cards ────────────────────────────────────────────────────
        const pctTerurus = stats.pct_terurus;
        const pctColor   = pctTerurus >= 70 ? '#22c55e' : pctTerurus >= 40 ? '#f59e0b' : '#ef4444';

        let kpiCards = `
            <div class="db-kpi-grid">
                ${isPengelola ? '' : `
                <div class="db-kpi-card kpi-ibadah">
                    <div class="db-kpi-icon">🕌</div>
                    <div class="db-kpi-val">${stats.total_ibadah}</div>
                    <div class="db-kpi-label">Rumah Ibadah</div>
                </div>`}
                <div class="db-kpi-card kpi-miskin">
                    <div class="db-kpi-icon">🏠</div>
                    <div class="db-kpi-val">${stats.total_miskin}</div>
                    <div class="db-kpi-label">KK Miskin${isPengelola ? ' (radius)' : ''}</div>
                </div>
                <div class="db-kpi-card kpi-jiwa">
                    <div class="db-kpi-icon">👥</div>
                    <div class="db-kpi-val">${stats.total_jiwa}</div>
                    <div class="db-kpi-label">Total Jiwa</div>
                </div>
                <div class="db-kpi-card kpi-log">
                    <div class="db-kpi-icon">📋</div>
                    <div class="db-kpi-val">${stats.total_log}</div>
                    <div class="db-kpi-label">Log Bantuan</div>
                </div>
            </div>`;

        // ── Coverage bar ──────────────────────────────────────────────────
        const coverageHtml = stats.total_miskin > 0 ? `
            <div class="db-section">
                <div class="db-section-title">📊 Cakupan Penanganan</div>
                <div class="db-coverage-row">
                    <div class="db-coverage-labels">
                        <span style="color:#22c55e">✅ Terurus: <strong>${stats.terurus}</strong></span>
                        <span style="color:#ef4444">⚠️ Tidak Terurus: <strong>${stats.tidak_terurus}</strong></span>
                        <span style="color:${pctColor}; font-weight:700">${pctTerurus}%</span>
                    </div>
                    <div class="db-progress-bar">
                        <div class="db-progress-fill" style="width:${pctTerurus}%; background:${pctColor};"></div>
                    </div>
                </div>
            </div>` : '';

        // ── Charts area ───────────────────────────────────────────────────
        const chartsHtml = `
            <div class="db-charts-grid">
                <div class="db-chart-card">
                    <div class="db-chart-title">📦 Kategori Bantuan</div>
                    <canvas id="chartKategori" height="180"></canvas>
                </div>
                <div class="db-chart-card">
                    <div class="db-chart-title">🎁 Tipe Bantuan (Log)</div>
                    <canvas id="chartTipe" height="180"></canvas>
                </div>
                ${!isPengelola ? `
                <div class="db-chart-card">
                    <div class="db-chart-title">🕌 Jenis Rumah Ibadah</div>
                    <canvas id="chartJenis" height="180"></canvas>
                </div>` : ''}
                <div class="db-chart-card db-chart-wide">
                    <div class="db-chart-title">📅 Aktivitas Bantuan (6 Bulan)</div>
                    <canvas id="chartBulan" height="140"></canvas>
                </div>
            </div>`;

        // ── Recent logs ───────────────────────────────────────────────────
        let logsHtml = `<div class="db-section"><div class="db-section-title">🕐 Bantuan Terbaru</div>`;
        if (recent_logs.length === 0) {
            logsHtml += `<div class="db-empty">Belum ada log bantuan</div>`;
        } else {
            logsHtml += `<div class="db-log-list">`;
            recent_logs.forEach(log => {
                const tgl = new Date(log.tanggal).toLocaleDateString('id-ID', { day: '2-digit', month: 'short', year: 'numeric' });
                const emoji = (window.IBADAH_EMOJI || {})[log.jenis_ibadah] || '🕌';
                logsHtml += `
                    <div class="db-log-item">
                        <div class="db-log-dot"></div>
                        <div class="db-log-info">
                            <div class="db-log-main">
                                <span class="db-log-tipe">${esc(log.tipe_bantuan)}</span>
                                <span class="db-log-kk">→ ${esc(log.nama_kk)}</span>
                            </div>
                            <div class="db-log-meta">${emoji} ${esc(log.nama_ibadah)} &nbsp;·&nbsp; ${tgl}${log.keterangan ? ` &nbsp;·&nbsp; <em>${esc(log.keterangan)}</em>` : ''}</div>
                        </div>
                    </div>`;
            });
            logsHtml += `</div>`;
        }
        logsHtml += `</div>`;

        // ── Ibadah performa table (admin only) ────────────────────────────
        let perfHtml = '';
        if (!isPengelola && ibadah_performa.length > 0) {
            perfHtml = `
                <div class="db-section">
                    <div class="db-section-title">🏆 Performa Rumah Ibadah</div>
                    <div class="db-table-wrap">
                        <table class="db-table">
                            <thead>
                                <tr>
                                    <th>#</th>
                                    <th>Nama</th>
                                    <th>Jenis</th>
                                    <th>Total Log</th>
                                    <th>Penerima Unik</th>
                                </tr>
                            </thead>
                            <tbody>
                                ${ibadah_performa.map((ib, i) => `
                                    <tr>
                                        <td>${i + 1}</td>
                                        <td><strong>${esc(ib.nama)}</strong></td>
                                        <td>${esc(ib.jenis)}</td>
                                        <td><span class="db-badge">${ib.total_log}</span></td>
                                        <td>${ib.total_penerima}</td>
                                    </tr>`).join('')}
                            </tbody>
                        </table>
                    </div>
                </div>`;
        }

        // ── Assemble ──────────────────────────────────────────────────────
        body.innerHTML = `
            ${headerHtml}
            ${kpiCards}
            ${coverageHtml}
            ${chartsHtml}
            ${logsHtml}
            ${perfHtml}
        `;

        // ── Draw Charts ───────────────────────────────────────────────────
        setTimeout(() => {
            drawPieChart('chartKategori', distribusi.kategori, ['#6366f1', '#f59e0b', '#22c55e', '#ef4444', '#06b6d4']);
            drawPieChart('chartTipe', distribusi.tipe_bantuan, ['#4f46e5', '#16a34a', '#dc2626', '#d97706', '#0891b2', '#7c3aed']);
            if (!isPengelola) drawPieChart('chartJenis', distribusi.jenis_ibadah, ['#f97316', '#6366f1', '#22c55e', '#ec4899', '#14b8a6']);
            drawBarChart('chartBulan', distribusi.per_bulan);
        }, 50);
    }

    // ── Chart helpers ──────────────────────────────────────────────────────
    function drawPieChart(canvasId, dataObj, colors) {
        const canvas = document.getElementById(canvasId);
        if (!canvas) return;
        const entries = Object.entries(dataObj || {});
        if (entries.length === 0) {
            const ctx = canvas.getContext('2d');
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            ctx.fillStyle = '#aaa';
            ctx.font = '13px Inter';
            ctx.textAlign = 'center';
            ctx.fillText('Belum ada data', canvas.width / 2, canvas.height / 2);
            return;
        }
        const labels = entries.map(([k]) => k);
        const values = entries.map(([, v]) => v);
        const total  = values.reduce((a, b) => a + b, 0);

        const ctx = canvas.getContext('2d');
        const cx  = canvas.width / 2;
        const cy  = canvas.height * 0.45;
        const r   = Math.min(cx, cy) * 0.75;

        ctx.clearRect(0, 0, canvas.width, canvas.height);

        let startAngle = -Math.PI / 2;
        values.forEach((v, i) => {
            const slice = (v / total) * 2 * Math.PI;
            ctx.beginPath();
            ctx.moveTo(cx, cy);
            ctx.arc(cx, cy, r, startAngle, startAngle + slice);
            ctx.closePath();
            ctx.fillStyle = colors[i % colors.length];
            ctx.fill();
            ctx.strokeStyle = '#fff';
            ctx.lineWidth = 2;
            ctx.stroke();
            startAngle += slice;
        });

        // Center text
        ctx.fillStyle = '#333';
        ctx.font = 'bold 16px Inter';
        ctx.textAlign = 'center';
        ctx.fillText(total, cx, cy + 5);

        // Legend
        const legY = cy + r + 16;
        const legItemW = 90;
        const perRow = Math.floor(canvas.width / legItemW);
        labels.forEach((lbl, i) => {
            const row = Math.floor(i / perRow);
            const col = i % perRow;
            const lx = (canvas.width - Math.min(labels.length, perRow) * legItemW) / 2 + col * legItemW;
            const ly = legY + row * 18;
            ctx.fillStyle = colors[i % colors.length];
            ctx.fillRect(lx, ly, 10, 10);
            ctx.fillStyle = '#555';
            ctx.font = '10px Inter';
            ctx.textAlign = 'left';
            const shortLbl = lbl.length > 10 ? lbl.slice(0, 9) + '…' : lbl;
            ctx.fillText(`${shortLbl} (${values[i]})`, lx + 13, ly + 9);
        });
    }

    function drawBarChart(canvasId, perBulan) {
        const canvas = document.getElementById(canvasId);
        if (!canvas) return;
        const ctx = canvas.getContext('2d');
        ctx.clearRect(0, 0, canvas.width, canvas.height);

        if (!perBulan || perBulan.length === 0) {
            ctx.fillStyle = '#aaa';
            ctx.font = '13px Inter';
            ctx.textAlign = 'center';
            ctx.fillText('Belum ada data bantuan', canvas.width / 2, canvas.height / 2);
            return;
        }

        const padL = 36, padR = 12, padT = 12, padB = 28;
        const W = canvas.width - padL - padR;
        const H = canvas.height - padT - padB;

        const values = perBulan.map(d => parseInt(d.cnt));
        const maxVal = Math.max(...values, 1);
        const barW = W / perBulan.length * 0.6;
        const gap  = W / perBulan.length;

        // Grid lines
        ctx.strokeStyle = '#e5e7eb';
        ctx.lineWidth = 1;
        for (let i = 0; i <= 4; i++) {
            const y = padT + H - (i / 4) * H;
            ctx.beginPath(); ctx.moveTo(padL, y); ctx.lineTo(padL + W, y); ctx.stroke();
            ctx.fillStyle = '#9ca3af';
            ctx.font = '9px Inter';
            ctx.textAlign = 'right';
            ctx.fillText(Math.round((i / 4) * maxVal), padL - 4, y + 3);
        }

        // Bars
        perBulan.forEach((d, i) => {
            const bh = (parseInt(d.cnt) / maxVal) * H;
            const bx = padL + i * gap + (gap - barW) / 2;
            const by = padT + H - bh;

            const grad = ctx.createLinearGradient(0, by, 0, padT + H);
            grad.addColorStop(0, '#6366f1');
            grad.addColorStop(1, '#a5b4fc');
            ctx.fillStyle = grad;
            ctx.beginPath();
            ctx.roundRect ? ctx.roundRect(bx, by, barW, bh, [4, 4, 0, 0]) : ctx.rect(bx, by, barW, bh);
            ctx.fill();

            // Value label
            ctx.fillStyle = '#4f46e5';
            ctx.font = 'bold 10px Inter';
            ctx.textAlign = 'center';
            ctx.fillText(d.cnt, bx + barW / 2, by - 4);

            // Month label
            const monthLabel = d.bulan ? d.bulan.slice(5) + '/' + d.bulan.slice(2, 4) : '';
            ctx.fillStyle = '#6b7280';
            ctx.font = '9px Inter';
            ctx.fillText(monthLabel, bx + barW / 2, padT + H + 14);
        });
    }

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

})();