{% extends "base.html" %}

{% block content %}
<div class="container-fluid py-4" style="background-color: #f8f9fa;">
    <h3 class="mb-4 fw-bold text-uppercase">Abstract Excavation Dashboard</h3>

    <div class="card shadow-sm mb-4">
        <div class="card-body bg-white">
            <div class="row g-3">
                <div class="col-md-2">
                    <label class="form-label fw-bold">Comparison Type</label>
                    <select id="filter-table" class="form-select" onchange="loadDashboardData()">
                        <option value="trench">Trench Excavation</option>
                        <option value="manhole">Manhole Excavation</option>
                        <option value="laying">Laying</option>
                    </select>
                </div>
                <div class="col-md-3">
                    <label class="form-label fw-bold">Subcontractor</label>
                    <select id="filter-subcon" class="form-select" onchange="loadDashboardData()">
                        <option value="All">All Subcontractors</option>
                    </select>
                </div>
                <div class="col-md-3">
                    <label class="form-label fw-bold">RA Bill No</label>
                    <select id="filter-ra" class="form-select" onchange="loadDashboardData()">
                        <option value="Cumulative">Cumulative (All Bills)</option>
                    </select>
                </div>
                <div class="col-md-4 d-flex align-items-end gap-2">
                    <button class="btn btn-primary flex-grow-1" onclick="loadDashboardData()">🔄 Refresh</button>
                    <button class="btn btn-secondary flex-grow-1" onclick="clearDashboard()">🗑️ Clear</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Empty State (Shown on page load) -->
    <div id="empty-state" class="alert alert-info text-center py-5">
        <h5>📊 Select filters to display data</h5>
        <p>Choose a Subcontractor and/or RA Bill to see the excavation abstract comparison.</p>
    </div>

    <!-- Data Display Area (Hidden by default) -->
    <div id="data-area" style="display: none;">
        <div class="row">
            <div class="col-lg-8">
                <div class="card shadow-sm h-100">
                    <div class="card-header bg-primary text-white fw-bold d-flex justify-content-between align-items-center">
                        <span id="chart-title">Excavation Comparison: Client vs Subcontractor Qty</span>
                        <small class=\"fw-normal\">(Horizontal Bar Chart)</small>
                    </div>
                    <div class=\"card-body\" style=\"position: relative; height: 700px; overflow-y: auto;\">
                        <canvas id="groupedBarChart"></canvas>
                    </div>
                </div>
            </div>

            <div class="col-lg-4">
                <div class="card shadow-sm h-100">
                    <div class="card-header bg-success text-white fw-bold">Excavation Abstract Table</div>
                    <div class="card-body p-0">
                        <div class="table-responsive" style="max-height: 500px; overflow-y: auto;">
                            <table class="table table-hover mb-0" id="abstract-table">
                                <thead class="table-light sticky-top">
                                    <tr>
                                        <th class="small">Soil / Depth</th>
                                        <th class="small">Client (m³)</th>
                                        <th class="small">Subcon (m³)</th>
                                        <th class="small">Diff</th>
                                    </tr>
                                </thead>
                                <tbody></tbody>
                                <tfoot class="table-light fw-bold position-sticky bottom-0">
                                    <tr id="table-totals" class="bg-light"></tr>
                                </tfoot>
                            </table>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<script>
let comparisonChart;

// Define color palette - ONLY 2 COLORS
const colorPalette = {
    'client': '#003D7A',      // Dark Blue for Client (RA Bill)
    'subcon': '#87CEEB'       // Light Sky Blue for Subcontractor
};

// 1. Function to Initialize or Update the Chart (VERTICAL BARS - 2 COLORS ONLY)
function updateChartUI(labels, clientData, subconData) {
    const ctx = document.getElementById('groupedBarChart').getContext('2d');
    if (comparisonChart) comparisonChart.destroy();

    comparisonChart = new Chart(ctx, {
        type: 'bar', // Vertical bar chart
        data: {
            labels: labels,
            datasets: [
                { 
                    label: 'Client Qty (m³)',
                    data: clientData,
                    backgroundColor: colorPalette.client,
                    borderColor: '#001F4D',
                    borderWidth: 1,
                    borderRadius: 4,
                    hoverBackgroundColor: '#002A5C',
                    hoverBorderWidth: 2
                },
                { 
                    label: 'Subcontractor Qty (m³)',
                    data: subconData,
                    backgroundColor: colorPalette.subcon,
                    borderColor: '#4A90B8',
                    borderWidth: 1,
                    borderRadius: 4,
                    hoverBackgroundColor: '#6BB3D9',
                    hoverBorderWidth: 2
                }
            ]
        },
        options: {
            indexAxis: 'x', // Vertical bars (default)
            responsive: true,
            maintainAspectRatio: false,
            interaction: {
                intersect: false,
                mode: 'index'
            },
            plugins: {
                legend: {
                    position: 'top',
                    labels: {
                        font: { size: 14, weight: 'bold' },
                        padding: 15,
                        usePointStyle: true,
                        boxWidth: 15
                    }
                },
                tooltip: {
                    backgroundColor: '#2c3e50',
                    padding: 12,
                    titleFont: { size: 13, weight: 'bold' },
                    bodyFont: { size: 12 },
                    borderColor: '#fff',
                    borderWidth: 1,
                    displayColors: true,
                    callbacks: {
                        label: function(context) {
                            let label = context.dataset.label || '';
                            if (label) label += ': ';
                            label += Number(context.parsed.y).toLocaleString('en-IN', {
                                minimumFractionDigits: 2,
                                maximumFractionDigits: 2
                            }) + ' m³';
                            return label;
                        }
                    }
                }
            },
            scales: {
                x: {
                    stacked: false,
                    grid: {
                        display: false
                    },
                    ticks: {
                        font: { size: 11 },
                        maxRotation: 45,
                        minRotation: 0
                    }
                },
                y: {
                    stacked: false,
                    beginAtZero: true,
                    grid: {
                        color: '#ecf0f1',
                        drawBorder: false
                    },
                    ticks: {
                        font: { size: 11 },
                        callback: function(value) {
                            return Number(value).toLocaleString('en-IN');
                        }
                    },
                    title: {
                        display: true,
                        text: 'Excavation Quantity (m³)',
                        font: { size: 12, weight: 'bold' }
                    }
                }
            }
        }
    });
}

// 2. Function to fetch unique filters (Subcontractors & RA Bills) from DB
function loadFilters() {
    console.log("🔄 Loading filters from /dashboard/api/filters...");
    fetch('/dashboard/api/filters')
        .then(res => {
            console.log(`Response status: ${res.status}`);
            return res.json();
        })
        .then(data => {
            console.log("✓ Filter data received:", data);
            
            const raSelect = document.getElementById('filter-ra');
            
            // CRITICAL: This clears the "RA-01", "RA-02" you typed in manually
            raSelect.innerHTML = '<option value="Cumulative">Cumulative (All Bills)</option>';

            if (data.ra_bills && data.ra_bills.length > 0) {
                console.log(`Adding ${data.ra_bills.length} RA bills to dropdown`);
                data.ra_bills.forEach(billNo => {
                    let opt = document.createElement('option');
                    opt.value = billNo;
                    opt.innerText = billNo; // This will show exactly what's in the DB
                    raSelect.appendChild(opt);
                    console.log(`  + Added RA Bill: ${billNo}`);
                });
            } else {
                console.warn("❌ No RA bills found in response");
            }
            
            // Repeat same for subcontractor dropdown
            const subconSelect = document.getElementById('filter-subcon');
            subconSelect.innerHTML = '<option value="All">All Subcontractors</option>';
            if (data.subcontractors && data.subcontractors.length > 0) {
                data.subcontractors.forEach(name => {
                    let opt = document.createElement('option');
                    opt.value = name;
                    opt.innerText = name;
                    subconSelect.appendChild(opt);
                });
            }
            console.log("✓ Filters loaded successfully");
        })
        .catch(err => {
            console.error("❌ Error loading filters:", err);
        });
}
// 3. Main function to load data and reflect in UI
function loadDashboardData() {
    const tableType = document.getElementById('filter-table').value;
    const subcon = document.getElementById('filter-subcon').value;
    const ra = document.getElementById('filter-ra').value;

    console.log(`📊 Filter values: Table="${tableType}", Subcon="${subcon}", RA="${ra}"`);

    // If still on default values, don't load
    if (subcon === 'All' && ra === 'Cumulative') {
        console.warn("⚠️  Please select filters first");
        return;
    }

    // Update chart title
    const tableNames = {
        'trench': 'Trench Excavation',
        'manhole': 'Manhole Excavation',
        'laying': 'Laying'
    };
    const chartTitle = document.getElementById('chart-title');
    if (chartTitle) {
        chartTitle.textContent = `${tableNames[tableType]}: Client (RA Bill) vs Subcontractor Qty`;
    }

    console.log(`📊 Loading dashboard data: Table="${tableType}", Subcon="${subcon}", RA="${ra}"`);
    
    const url = `/dashboard/api/excavation-abstract?table_type=${encodeURIComponent(tableType)}&subcontractor=${encodeURIComponent(subcon)}&ra_bill=${encodeURIComponent(ra)}`;
    console.log(`Fetching from URL: ${url}`);
    
    fetch(url)
        .then(res => {
            console.log(`Response status: ${res.status}`);
            if (!res.ok) {
                throw new Error(`HTTP Error: ${res.status}`);
            }
            return res.json();
        })
        .then(data => {
            console.log("✓ Dashboard data received:", data);
            
            if (!Array.isArray(data)) {
                console.error("❌ Response is not an array:", data);
                return;
            }
            
            if (data.length === 0) {
                console.warn("⚠️  No data returned for this filter combination");
                alert("No data found for selected filters");
                return;
            }
            
            const labels = [];
            const clientData = [];
            const subconData = [];
            const tableBody = document.querySelector("#abstract-table tbody");
            tableBody.innerHTML = "";

            let tClient = 0, tSub = 0, tDiff = 0;

            data.forEach(item => {
                // Label format: "Soil Type Depth"
                const label = `${item.soil_type}\n${item.depth}`;
                labels.push(label);
                clientData.push(item.client_qty || 0);
                subconData.push(item.subcon_qty || 0);

                tClient += item.client_qty || 0;
                tSub += item.subcon_qty || 0;
                tDiff += (item.difference || 0);

                const diffColor = (item.difference || 0) < 0 ? 'text-danger' : 'text-success';
                tableBody.innerHTML += `
                    <tr>
                        <td class="small">
                            <strong>${item.soil_type}</strong>
                            <br>
                            <span class="text-muted small">${item.depth}</span>
                        </td>
                        <td class="small text-primary fw-bold">${(item.client_qty || 0).toLocaleString('en-IN', {maximumFractionDigits: 2})}</td>
                        <td class="small text-success fw-bold">${(item.subcon_qty || 0).toLocaleString('en-IN', {maximumFractionDigits: 2})}</td>
                        <td class="small fw-bold ${diffColor}">${(item.difference || 0).toLocaleString('en-IN', {maximumFractionDigits: 2})}</td>
                    </tr>
                `;
            });

            const totalDiffColor = tDiff < 0 ? 'text-danger' : 'text-success';
            document.getElementById('table-totals').innerHTML = `
                <td class="small fw-bold">TOTAL</td>
                <td class="small fw-bold text-primary">${tClient.toLocaleString('en-IN', {maximumFractionDigits: 2})}</td>
                <td class="small fw-bold text-success">${tSub.toLocaleString('en-IN', {maximumFractionDigits: 2})}</td>
                <td class="small fw-bold ${totalDiffColor}">${tDiff.toLocaleString('en-IN', {maximumFractionDigits: 2})}</td>
            `;

            // Show data area
            document.getElementById('empty-state').style.display = 'none';
            document.getElementById('data-area').style.display = 'block';

            updateChartUI(labels, clientData, subconData);
            console.log("✓ Chart and table updated successfully");
        })
        .catch(err => {
            console.error("❌ Error loading dashboard data:", err);
            alert(`Failed to load dashboard data: ${err.message}`);
        });
}

// Clear dashboard
function clearDashboard() {
    console.log("🗑️  Clearing dashboard...");
    document.getElementById('filter-table').value = 'trench';
    document.getElementById('filter-subcon').value = 'All';
    document.getElementById('filter-ra').value = 'Cumulative';
    document.getElementById('empty-state').style.display = 'block';
    document.getElementById('data-area').style.display = 'none';
    if (comparisonChart) comparisonChart.destroy();
}

// Start: Load filters only, don't auto-load data
document.addEventListener("DOMContentLoaded", () => {
    console.log("🚀 Dashboard initialized");
    loadFilters();
    // Don't auto-load data - keep dashboard blank until filters selected
});
</script>
{% endblock %}