@extends('layouts.app')
@section('page-title', 'Concrete Calculator')

@push('page-css')
<style>
/* Concrete Calculator */
.concrete-page { max-width: 960px; margin: 0 auto; padding: 24px 20px; }
.concrete-page h1 { font-size: 1.6rem; margin: 0 0 6px 0; color: #333; }
.concrete-page .page-desc { color: #666; font-size: 0.92rem; margin: 0 0 24px 0; }

.concrete-form {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: var(--brand-border-radius, 8px);
    padding: 28px 24px;
    margin-bottom: 28px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.concrete-form .form-group { margin-bottom: 18px; }
.concrete-form .form-group label {
    display: block; margin-bottom: 6px; font-weight: 600;
    font-size: 0.88rem; color: #444;
}

.concrete-form .form-group input,
.concrete-form .form-group select {
    width: 100%; padding: 10px 12px;
    border: 1px solid #d0d0d0;
    border-radius: var(--brand-border-radius, 6px);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fff; color: #333; box-sizing: border-box;
}

.concrete-form .form-group input:focus,
.concrete-form .form-group select:focus {
    outline: none;
    border-color: var(--brand-primary, #4CAF50);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-primary, #4CAF50) 15%, transparent);
}

.concrete-form .form-group small { display: block; margin-top: 4px; color: #888; font-size: 0.78rem; }

.concrete-form .form-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}

.concrete-submit {
    margin-top: 24px; padding: 12px 32px;
    background: var(--brand-primary, #4CAF50); color: #fff; border: none;
    border-radius: var(--brand-border-radius, 6px);
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: background 0.2s, transform 0.15s; width: 100%;
}
.concrete-submit:hover { background: var(--brand-primary-dark, #388E3C); transform: translateY(-1px); }

/* Type selector tabs */
.concrete-types {
    display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap;
}
.concrete-type-btn {
    padding: 10px 20px; border: 2px solid #e0e0e0; border-radius: var(--brand-border-radius, 6px);
    background: #fff; cursor: pointer; font-weight: 600; font-size: 0.88rem;
    color: #666; transition: all 0.2s;
}
.concrete-type-btn:hover { border-color: var(--brand-primary, #4CAF50); color: var(--brand-primary, #4CAF50); }
.concrete-type-btn.active {
    border-color: var(--brand-primary, #4CAF50);
    background: var(--brand-primary, #4CAF50); color: #fff;
}

.concrete-dims { display: none; }
.concrete-dims.active { display: block; }

/* Results */
.concrete-results { display: none; }

.concrete-card {
    background: #fff; border: 1px solid #e0e0e0;
    border-radius: var(--brand-border-radius, 8px);
    margin-bottom: 20px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); overflow: hidden;
}
.concrete-card-header {
    padding: 16px 20px; border-bottom: 1px solid #eee;
}
.concrete-card-header h2 { margin: 0; font-size: 1.15rem; color: #333; }
.concrete-card-body { padding: 20px; }

.concrete-stat-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px;
}
.concrete-stat {
    text-align: center; padding: 16px; background: #f8f9fa;
    border-radius: var(--brand-border-radius, 6px);
}
.concrete-stat-value {
    font-size: 1.6rem; font-weight: 700;
    color: var(--brand-primary, #4CAF50); line-height: 1.2;
}
.concrete-stat-label { font-size: 0.82rem; color: #666; margin-top: 4px; }

.concrete-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.concrete-table th { text-align: left; padding: 10px 12px; border-bottom: 2px solid #eee; color: #555; font-weight: 600; }
.concrete-table td { padding: 10px 12px; border-bottom: 1px solid #f0f0f0; color: #333; }
.concrete-table tr:last-child td { border-bottom: none; }

.concrete-warning {
    padding: 12px 16px; background: #fef3cd; border: 1px solid #ffc107;
    border-radius: var(--brand-border-radius, 6px); color: #856404;
    font-size: 0.88rem; margin-top: 16px;
}

/* Summary card */
.concrete-summary { background: var(--brand-primary, #4CAF50); border-color: var(--brand-primary, #4CAF50); }
.concrete-summary .concrete-card-header { border-bottom-color: rgba(255,255,255,0.15); }
.concrete-summary .concrete-card-header h2 { color: #fff; }
.concrete-summary .concrete-card-body { color: #fff; }
.concrete-summary .concrete-stat { background: rgba(255,255,255,0.15); }
.concrete-summary .concrete-stat-value { color: #fff; }
.concrete-summary .concrete-stat-label { color: rgba(255,255,255,0.8); }

/* ===== Dark Mode ===== */
body.dark-mode .concrete-page h1 { color: #f0f0f0; }
body.dark-mode .concrete-page .page-desc { color: #aaa; }
body.dark-mode .concrete-form { background: #2d2d2d; border-color: #404040; }
body.dark-mode .concrete-form .form-group label { color: #ccc; }
body.dark-mode .concrete-form .form-group input,
body.dark-mode .concrete-form .form-group select { background: #1e1e1e; border-color: #505050; color: #e0e0e0; }
body.dark-mode .concrete-type-btn { background: #2d2d2d; border-color: #505050; color: #aaa; }
body.dark-mode .concrete-type-btn.active { background: var(--brand-primary, #4CAF50); color: #fff; border-color: var(--brand-primary, #4CAF50); }
body.dark-mode .concrete-card { background: #2d2d2d; border-color: #404040; }
body.dark-mode .concrete-card-header { border-bottom-color: #404040; }
body.dark-mode .concrete-card-header h2 { color: #f0f0f0; }
body.dark-mode .concrete-stat { background: #383838; }
body.dark-mode .concrete-table th { color: #ccc; border-bottom-color: #404040; }
body.dark-mode .concrete-table td { color: #ddd; border-bottom-color: #383838; }
body.dark-mode .concrete-warning { background: #453b1a; border-color: #7f6d1d; color: #ffc107; }

/* ===== Theme overrides ===== */
body.theme-forest .concrete-form,
body.theme-forest .concrete-card { background: #243020; border-color: #3d5235; }
body.theme-forest .concrete-form .form-group label { color: #b8d4a8; }
body.theme-forest .concrete-form .form-group input,
body.theme-forest .concrete-form .form-group select { background: #1a2418; border-color: #3d5235; color: #b8d4a8; }
body.theme-forest .concrete-type-btn { background: #243020; border-color: #3d5235; color: #8aaa78; }
body.theme-forest .concrete-card-header { border-bottom-color: #3d5235; }
body.theme-forest .concrete-card-header h2 { color: #b8d4a8; }
body.theme-forest .concrete-page h1 { color: #b8d4a8; }
body.theme-forest .concrete-page .page-desc { color: #8aaa78; }
body.theme-forest .concrete-stat { background: #1a2418; }
body.theme-forest .concrete-table th { color: #8aaa78; border-bottom-color: #3d5235; }
body.theme-forest .concrete-table td { color: #b8d4a8; border-bottom-color: #2a3825; }

body.theme-ocean .concrete-form,
body.theme-ocean .concrete-card { background: #1c2636; border-color: #2e4460; }
body.theme-ocean .concrete-form .form-group label { color: #a0c4e8; }
body.theme-ocean .concrete-form .form-group input,
body.theme-ocean .concrete-form .form-group select { background: #141e2e; border-color: #2e4460; color: #a0c4e8; }
body.theme-ocean .concrete-type-btn { background: #1c2636; border-color: #2e4460; color: #7a9ab8; }
body.theme-ocean .concrete-card-header { border-bottom-color: #2e4460; }
body.theme-ocean .concrete-card-header h2 { color: #a0c4e8; }
body.theme-ocean .concrete-page h1 { color: #a0c4e8; }
body.theme-ocean .concrete-page .page-desc { color: #7a9ab8; }
body.theme-ocean .concrete-stat { background: #141e2e; }
body.theme-ocean .concrete-table th { color: #7a9ab8; border-bottom-color: #2e4460; }
body.theme-ocean .concrete-table td { color: #a0c4e8; border-bottom-color: #1f2d40; }

body.theme-slate .concrete-form,
body.theme-slate .concrete-card { background: #faf7f2; border-color: #c8bfb0; }
body.theme-slate .concrete-form .form-group label { color: #504840; }
body.theme-slate .concrete-form .form-group input,
body.theme-slate .concrete-form .form-group select { background: #f5f0e8; border-color: #c8bfb0; color: #504840; }
body.theme-slate .concrete-type-btn { background: #faf7f2; border-color: #c8bfb0; color: #8b7d6b; }
body.theme-slate .concrete-card-header { border-bottom-color: #c8bfb0; }
body.theme-slate .concrete-card-header h2 { color: #504840; }
body.theme-slate .concrete-page h1 { color: #504840; }
body.theme-slate .concrete-page .page-desc { color: #8b7d6b; }
body.theme-slate .concrete-stat { background: #f5f0e8; }
body.theme-slate .concrete-table th { color: #8b7d6b; border-bottom-color: #c8bfb0; }
body.theme-slate .concrete-table td { color: #504840; border-bottom-color: #ebe5da; }

body.theme-sunset .concrete-form,
body.theme-sunset .concrete-card { background: #fff8f5; border-color: #e0bfb0; }
body.theme-sunset .concrete-form .form-group label { color: #6b3f35; }
body.theme-sunset .concrete-form .form-group input,
body.theme-sunset .concrete-form .form-group select { background: #fdf5f0; border-color: #e0bfb0; color: #6b3f35; }
body.theme-sunset .concrete-type-btn { background: #fff8f5; border-color: #e0bfb0; color: #a06858; }
body.theme-sunset .concrete-card-header { border-bottom-color: #e0bfb0; }
body.theme-sunset .concrete-card-header h2 { color: #6b3f35; }
body.theme-sunset .concrete-page h1 { color: #6b3f35; }
body.theme-sunset .concrete-page .page-desc { color: #a06858; }
body.theme-sunset .concrete-stat { background: #fdf5f0; }
body.theme-sunset .concrete-table th { color: #a06858; border-bottom-color: #e0bfb0; }
body.theme-sunset .concrete-table td { color: #6b3f35; border-bottom-color: #faeee8; }

@media (max-width: 640px) {
    .concrete-form .form-grid { grid-template-columns: 1fr; }
    .concrete-types { flex-direction: column; }
    .concrete-stat-grid { grid-template-columns: 1fr 1fr; }
}
</style>
@endpush

@section('content')
<div class="concrete-page">
    <h1>Concrete Calculator</h1>
    <p class="page-desc">Calculate concrete volume and materials for slabs, strip footings, pads, and post holes.</p>

    <div class="concrete-form">
        <div class="concrete-types">
            <button type="button" class="concrete-type-btn active" data-type="slab">Slab</button>
            <button type="button" class="concrete-type-btn" data-type="strip">Strip Footing</button>
            <button type="button" class="concrete-type-btn" data-type="pad">Pad Foundation</button>
            <button type="button" class="concrete-type-btn" data-type="posthole">Post Hole</button>
        </div>

        <form id="concreteForm">
            {{-- Slab --}}
            <div class="concrete-dims active" data-dims="slab">
                <div class="form-grid">
                    <div class="form-group">
                        <label for="slabLength">Length (m)</label>
                        <input type="number" id="slabLength" step="0.01" min="0.1" placeholder="e.g. 4.0">
                    </div>
                    <div class="form-group">
                        <label for="slabWidth">Width (m)</label>
                        <input type="number" id="slabWidth" step="0.01" min="0.1" placeholder="e.g. 3.0">
                    </div>
                    <div class="form-group">
                        <label for="slabDepth">Depth (mm)</label>
                        <input type="number" id="slabDepth" min="50" placeholder="e.g. 100">
                        <small>Typical: 100mm patio, 150mm driveway</small>
                    </div>
                </div>
            </div>

            {{-- Strip --}}
            <div class="concrete-dims" data-dims="strip">
                <div class="form-grid">
                    <div class="form-group">
                        <label for="stripLength">Trench Length (m)</label>
                        <input type="number" id="stripLength" step="0.01" min="0.1" placeholder="e.g. 12.0">
                    </div>
                    <div class="form-group">
                        <label for="stripWidth">Trench Width (mm)</label>
                        <input type="number" id="stripWidth" min="100" placeholder="e.g. 450">
                        <small>Typical: 450mm for single skin wall</small>
                    </div>
                    <div class="form-group">
                        <label for="stripDepth">Trench Depth (mm)</label>
                        <input type="number" id="stripDepth" min="100" placeholder="e.g. 225">
                        <small>Typical: 225mm minimum</small>
                    </div>
                </div>
            </div>

            {{-- Pad --}}
            <div class="concrete-dims" data-dims="pad">
                <div class="form-grid">
                    <div class="form-group">
                        <label for="padCount">Number of Pads</label>
                        <input type="number" id="padCount" min="1" placeholder="e.g. 4">
                    </div>
                    <div class="form-group">
                        <label for="padLength">Pad Length (mm)</label>
                        <input type="number" id="padLength" min="100" placeholder="e.g. 600">
                    </div>
                    <div class="form-group">
                        <label for="padWidth">Pad Width (mm)</label>
                        <input type="number" id="padWidth" min="100" placeholder="e.g. 600">
                    </div>
                </div>
                <div class="form-grid" style="margin-top:18px">
                    <div class="form-group">
                        <label for="padDepth">Pad Depth (mm)</label>
                        <input type="number" id="padDepth" min="100" placeholder="e.g. 300">
                    </div>
                </div>
            </div>

            {{-- Post Hole --}}
            <div class="concrete-dims" data-dims="posthole">
                <div class="form-grid">
                    <div class="form-group">
                        <label for="holeCount">Number of Holes</label>
                        <input type="number" id="holeCount" min="1" placeholder="e.g. 6">
                    </div>
                    <div class="form-group">
                        <label for="holeDiameter">Hole Diameter (mm)</label>
                        <input type="number" id="holeDiameter" min="100" placeholder="e.g. 300">
                        <small>Typical: 300mm for fence posts</small>
                    </div>
                    <div class="form-group">
                        <label for="holeDepth">Hole Depth (mm)</label>
                        <input type="number" id="holeDepth" min="100" placeholder="e.g. 600">
                        <small>Typical: 600mm for fence posts</small>
                    </div>
                </div>
            </div>

            <button type="submit" class="concrete-submit">Calculate</button>
        </form>
    </div>

    <div id="concreteResults" class="concrete-results">
        {{-- Volume Summary --}}
        <div class="concrete-card concrete-summary">
            <div class="concrete-card-header"><h2>Volume Summary</h2></div>
            <div class="concrete-card-body">
                <div class="concrete-stat-grid" id="volumeStats"></div>
            </div>
        </div>

        {{-- Material Options --}}
        <div class="concrete-card">
            <div class="concrete-card-header"><h2>Material Options</h2></div>
            <div class="concrete-card-body">
                <table class="concrete-table">
                    <thead><tr><th>Option</th><th>Quantity</th><th>Notes</th></tr></thead>
                    <tbody id="materialTable"></tbody>
                </table>
                <div id="concreteWarning" class="concrete-warning" style="display:none"></div>
            </div>
        </div>

        {{-- Hand Mix Breakdown --}}
        <div class="concrete-card">
            <div class="concrete-card-header"><h2>Hand Mix Breakdown (1:2:3 ratio)</h2></div>
            <div class="concrete-card-body">
                <div class="concrete-stat-grid" id="handMixStats"></div>
            </div>
        </div>

        {{-- Rebar --}}
        <div class="concrete-card" id="rebarCard" style="display:none">
            <div class="concrete-card-header"><h2>Reinforcement (Optional)</h2></div>
            <div class="concrete-card-body">
                <table class="concrete-table">
                    <thead><tr><th>Item</th><th>Quantity</th><th>Notes</th></tr></thead>
                    <tbody id="rebarTable"></tbody>
                </table>
            </div>
        </div>
    </div>
</div>
@endsection

@push('page-scripts')
<script>
(function() {
    const activeType = { current: 'slab' };

    // Type selector
    document.querySelectorAll('.concrete-type-btn').forEach(btn => {
        btn.addEventListener('click', () => {
            document.querySelectorAll('.concrete-type-btn').forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
            document.querySelectorAll('.concrete-dims').forEach(d => d.classList.remove('active'));
            document.querySelector(`[data-dims="${btn.dataset.type}"]`).classList.add('active');
            activeType.current = btn.dataset.type;
        });
    });

    document.getElementById('concreteForm').addEventListener('submit', function(e) {
        e.preventDefault();
        calculate();
    });

    function getVal(id) { return parseFloat(document.getElementById(id).value) || 0; }

    function calculate() {
        let volume = 0; // in m³
        const type = activeType.current;
        let area = 0;

        if (type === 'slab') {
            const l = getVal('slabLength'), w = getVal('slabWidth'), d = getVal('slabDepth') / 1000;
            if (!l || !w || !d) return;
            volume = l * w * d;
            area = l * w;
        } else if (type === 'strip') {
            const l = getVal('stripLength'), w = getVal('stripWidth') / 1000, d = getVal('stripDepth') / 1000;
            if (!l || !w || !d) return;
            volume = l * w * d;
        } else if (type === 'pad') {
            const n = getVal('padCount'), l = getVal('padLength') / 1000, w = getVal('padWidth') / 1000, d = getVal('padDepth') / 1000;
            if (!n || !l || !w || !d) return;
            volume = n * l * w * d;
        } else if (type === 'posthole') {
            const n = getVal('holeCount'), dia = getVal('holeDiameter') / 1000, d = getVal('holeDepth') / 1000;
            if (!n || !dia || !d) return;
            const r = dia / 2;
            volume = n * Math.PI * r * r * d;
        }

        const wastage = volume * 0.10;
        const totalVolume = volume + wastage;

        // Material calculations
        const bags25kg = Math.ceil(totalVolume / 0.012);
        const weightTonnes = totalVolume * 2.4; // concrete ~2400 kg/m³

        // Hand mix (1:2:3 by volume) — 1m³ concrete needs ~6.5 bags cement + sand + gravel
        const cementBags = Math.ceil(totalVolume * 6.5); // 25kg bags
        const sandKg = Math.ceil(totalVolume * 700); // approx kg sharp sand
        const gravelKg = Math.ceil(totalVolume * 1100); // approx kg gravel

        // Volume stats
        const statsHtml = `
            <div class="concrete-stat">
                <div class="concrete-stat-value">${volume.toFixed(3)}</div>
                <div class="concrete-stat-label">Net Volume (m³)</div>
            </div>
            <div class="concrete-stat">
                <div class="concrete-stat-value">${wastage.toFixed(3)}</div>
                <div class="concrete-stat-label">+10% Wastage (m³)</div>
            </div>
            <div class="concrete-stat">
                <div class="concrete-stat-value">${totalVolume.toFixed(3)}</div>
                <div class="concrete-stat-label">Total Volume (m³)</div>
            </div>
            <div class="concrete-stat">
                <div class="concrete-stat-value">${weightTonnes.toFixed(1)}</div>
                <div class="concrete-stat-label">Est. Weight (tonnes)</div>
            </div>
        `;
        document.getElementById('volumeStats').innerHTML = statsHtml;

        // Material options table
        let tableHtml = `
            <tr><td>Ready-mix concrete</td><td><strong>${totalVolume.toFixed(2)} m³</strong></td><td>Minimum order usually 1 m³</td></tr>
            <tr><td>Pre-mixed bags (25kg)</td><td><strong>${bags25kg} bags</strong></td><td>Each bag ≈ 0.012 m³</td></tr>
        `;
        document.getElementById('materialTable').innerHTML = tableHtml;

        // Warning for large volumes
        const warning = document.getElementById('concreteWarning');
        if (totalVolume >= 1) {
            warning.style.display = 'block';
            warning.innerHTML = `<strong>Tip:</strong> For ${totalVolume.toFixed(2)} m³, ready-mix delivery is recommended over hand mixing. ${bags25kg} bags would weigh ${(bags25kg * 25 / 1000).toFixed(1)} tonnes.`;
        } else {
            warning.style.display = 'none';
        }

        // Hand mix breakdown
        document.getElementById('handMixStats').innerHTML = `
            <div class="concrete-stat">
                <div class="concrete-stat-value">${cementBags}</div>
                <div class="concrete-stat-label">Cement (25kg bags)</div>
            </div>
            <div class="concrete-stat">
                <div class="concrete-stat-value">${sandKg}</div>
                <div class="concrete-stat-label">Sharp Sand (kg)</div>
            </div>
            <div class="concrete-stat">
                <div class="concrete-stat-value">${gravelKg}</div>
                <div class="concrete-stat-label">Gravel/Aggregate (kg)</div>
            </div>
        `;

        // Rebar for slabs
        const rebarCard = document.getElementById('rebarCard');
        if (type === 'slab' && area > 0) {
            rebarCard.style.display = '';
            const sheetArea = 4.8 * 2.4; // A142 mesh sheet
            const sheetsNeeded = Math.ceil(area / sheetArea);
            document.getElementById('rebarTable').innerHTML = `
                <tr><td>A142 Mesh Sheets</td><td><strong>${sheetsNeeded} sheets</strong></td><td>4.8m × 2.4m per sheet (${sheetArea} m² each)</td></tr>
                <tr><td>Coverage area</td><td><strong>${area.toFixed(2)} m²</strong></td><td>Allow 150mm overlap between sheets</td></tr>
            `;
        } else {
            rebarCard.style.display = 'none';
        }

        document.getElementById('concreteResults').style.display = 'block';
        document.getElementById('concreteResults').scrollIntoView({ behavior: 'smooth', block: 'start' });
    }
})();
</script>
@endpush