{% extends "base.html" %}
{% load static i18n %}

{% block title %}{% trans "Recruitment Dashboard" %} - {{ block.super }}{% endblock %}

{% block content %}
<div class="space-y-6">
    
    <div class="flex flex-col md:flex-row md:items-center md:justify-between gap-4">
        <div>
            <h1 class="text-2xl font-semibold text-gray-900">{% trans "Recruitment Analytics" %}</h1>
            <p class="text-sm text-gray-400 mt-1">{% trans "Overview of your recruitment pipeline" %}</p>
        </div>
        
        {# Job Filter Dropdown #}
        <form method="get" action="" class="flex items-center gap-3">
            <label for="job-select" class="text-sm font-medium text-gray-700">{% trans "Filter Job:" %}</label>
            <select name="selected_job_pk" id="job-select" onchange="this.form.submit()" class="px-4 py-2 bg-white border border-gray-200 rounded-lg text-sm focus:ring-2 focus:ring-temple-red/20 focus:border-temple-red outline-none transition">
                <option value="">{% trans "All Jobs (Default View)" %}</option>
                {% for job in jobs%}
                    <option value="{{ job.pk}}" {% if current_job_id|slugify == job.pk|slugify %}selected{% endif %}>
                        {{ job.title }}
                    </option>
                {% endfor %}
            </select>
        </form>
    </div>

    {# -------------------------------------------------------------------------- #}
    {# STATS CARDS SECTION (12 KPIs) #}
    {# -------------------------------------------------------------------------- #}
    {% include 'recruitment/partials/stats_cards.html' %}

    {# -------------------------------------------------------------------------- #}
    {# CHARTS SECTION #}
    {# -------------------------------------------------------------------------- #}
    <div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
        {# AREA CHART - Daily Candidate Applications Trend (Global Chart) #}
        <div class="lg:col-span-2 bg-white rounded-2xl p-6 shadow-sm border border-gray-100">
            <div class="flex justify-between items-center mb-6">
                <div>
                    <h4 class="font-bold text-gray-800">{% trans "Daily Applications Trend" %}</h4>
                    <p class="text-xs text-gray-400">{% trans "Daily application volume over time" %}</p>
                </div>
            </div>
            <div class="h-80">
                <canvas id="dailyApplicationsChart"></canvas>
            </div>
        </div>

        {# BAR CHART - Application Volume (Global Chart) #}
        <div class="bg-white rounded-2xl p-6 shadow-sm border border-gray-100">
            <div class="flex justify-between items-center mb-6">
                <div>
                    <h4 class="font-bold text-gray-800">{% trans "Top 5 Application Volume" %}</h4>
                    <p class="text-xs text-gray-400">{% trans "Jobs with most applications" %}</p>
                </div>
            </div>
            <div class="h-64">
                <canvas id="applicationsChart"></canvas>
            </div>
        </div>

        {# FUNNEL CHART - Candidate Pipeline Status (Scoped Chart) #}
        <div class="bg-white rounded-2xl p-6 shadow-sm border border-gray-100">
            <div class="flex justify-between items-center mb-6">
                <div>
                    <h4 class="font-bold text-gray-800">
                        {% if current_job %}
                            {% trans "Pipeline Funnel: " %}{{ current_job.title }}
                        {% else %}
                            {% trans "Total Pipeline Funnel (All Jobs)" %}
                        {% endif %}
                    </h4>
                    <p class="text-xs text-gray-400">{% trans "Candidate pipeline stages" %}</p>
                </div>
            </div>
            <div class="h-64">
                <canvas id="application_funnel_chart"></canvas>
            </div>
        </div>

        {# GAUGE CHART - Average Time-to-Hire (Avg. Days) #}
        <div class="lg:col-span-2 bg-white rounded-2xl p-6 shadow-sm border border-gray-100">
            <div class="flex justify-between items-center mb-6">
                <div>
                    <h4 class="font-bold text-gray-800">{% trans "Time-to-Hire Target Check" %}</h4>
                    <p class="text-xs text-gray-400">{% trans "Average days to hire candidates" %}</p>
                </div>
            </div>
            <div class="h-64 flex justify-center items-center">
                <div id="timeToHireGauge" class="text-center w-full">
                    {% include "recruitment/partials/_guage_chart.html" %}
                </div>
            </div>
        </div>
    </div>

</div>

<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@3.4.4"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-luxon@1.3.1"></script>


<script>
    // Pass context data safely to JavaScript
    const totalCandidatesScoped = parseInt('{{ total_applications|default:0 }}');
    const jobTitles = JSON.parse('{{ job_titles|escapejs }}').slice(0, 5);
    const jobAppCounts = JSON.parse('{{ job_app_counts|escapejs }}').slice(0, 5);
    const stages = JSON.parse('{{ application_stage|escapejs }}');
    const counts = JSON.parse('{{ application_count|safe }}');

    // --- 1. BAR CHART configuration (Top 5 Applications) ---
    const ctxBar = document.getElementById('applicationsChart').getContext('2d');
    new Chart(ctxBar, {
        type: 'bar',
        data: {
            labels: jobTitles,
            datasets: [{
                label: '{% trans "Applications" %}',
                data: jobAppCounts,
                backgroundColor: '#9d2235',
                borderColor: '#7a1a29',
                borderWidth: 1,
                barThickness: 50,
                borderRadius: 4
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: { display: false },
                title: {
                    display: true,
                    text: '{% trans "Top 5 Most Applied Jobs" %}',
                    font: { size: 14, weight: '600' },
                    color: '#343a40'
                }
            },
            scales: {
                y: {
                    beginAtZero: true,
                    title: { display: true, text: '{% trans "Total Applications" %}', font: { size: 11 } },
                    ticks: { color: '#666', precision: 0 },
                    grid: { color: '#e5e7eb' }
                },
                x: {
                    ticks: { color: '#666', font: { size: 11 } },
                    grid: { display: false }
                }
            }
        }
    });


    // --- 2. CANDIDATE PIPELINE CENTERED FUNNEL CHART ---

    // 1. Find the maximum count (for the widest bar)
    const maxCount = Math.max(...counts);

    // 2. Calculate the transparent "spacer" data needed to center each bar
    const spacerData = counts.map(count => (maxCount - count) / 2);

    // Define the dark-to-light temple red shades (5 stages, reverse order for funnel look)
    const templeRedShades = [
        '#c04050', // APPLIED - Lighter Red
        '#a83242', // EXAM
        '#9d2235', // INTERVIEW
        '#8a1c2d', // OFFER
        '#7a1a29', // HIRED - Darkest Red
    ];

    // Slice and use the first N shades based on the number of stages
    const stageColors = templeRedShades.slice(templeRedShades.length - stages.length);

    const ctxFunnel = document.getElementById('application_funnel_chart').getContext('2d');

    new Chart(ctxFunnel, {
        type: 'bar',
        data: {
            labels: stages,
            datasets: [
                // 1. TRANSPARENT SPACER DATASET (Pushes the bar to the center)
                {
                    label: 'Spacer',
                    data: spacerData,
                    backgroundColor: 'transparent',
                    hoverBackgroundColor: 'transparent',
                    barThickness: 50,
                    datalabels: { display: false },
                    tooltip: { enabled: false }
                },
                // 2. VISIBLE CANDIDATE COUNT DATASET
                {
                    label: '{% trans "Application Count" %}',
                    data: counts,
                    backgroundColor: stageColors,
                    barThickness: 50,
                    borderRadius: 4
                }
            ]
        },
        options: {
            indexAxis: 'y',
            responsive: true,
            maintainAspectRatio: false,

            scales: {
                x: {
                    beginAtZero: true,
                    stacked: true,
                    display: false,
                    max: maxCount
                },
                y: {
                    stacked: true,
                    grid: { display: false },
                    ticks: {
                        color: '#343a40',
                        font: { size: 12, weight: '500' }
                    }
                }
            },
            plugins: {
                legend: { display: false },
                title: { display: false },
                tooltip: {
                    filter: (tooltipItem) => {
                        return tooltipItem.datasetIndex === 1;
                    }
                }
            }
        }
    });



    // Pass context data safely to JavaScript
    const globalDates = JSON.parse('{{ global_dates|escapejs }}');
    const globalCounts = JSON.parse('{{ global_counts|escapejs }}');
    const scopedDates = JSON.parse('{{ scoped_dates|escapejs }}');
    const scopedCounts = JSON.parse('{{ scoped_counts|escapejs }}');
    const isJobScoped = '{{ is_job_scoped }}' === 'True';


    // --- 4. DAILY APPLICATIONS LINE CHART ---
    const ctxLine = document.getElementById('dailyApplicationsChart').getContext('2d');

    // Create datasets
    const datasets = [{
        label: '{% trans "All Jobs" %}',
        data: globalCounts,
        borderColor: '#7a1a29',
        backgroundColor: 'rgba(122, 26, 41, 0.05)',
        fill: true,
        tension: 0.4,
        pointRadius: 4,
        pointBackgroundColor: '#fff',
        pointBorderWidth: 2
    }];

    // Add scoped data if a job is selected
    if (isJobScoped) {
        datasets.push({
            label: '{% trans "Current Job" %}',
            data: scopedCounts,
            borderColor: '#9d2235',
            backgroundColor: 'rgba(157, 34, 53, 0.05)',
            fill: true,
            tension: 0.4,
            pointRadius: 4,
            pointBackgroundColor: '#fff',
            pointBorderWidth: 2
        });
    }

    new Chart(ctxLine, {
        type: 'line',
        data: {
            // Use global dates as the base labels
            labels: globalDates,
            datasets: datasets
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: {
                    position: 'top',
                },
                title: {
                    display: true,
                    text: '{% trans "Daily Applications (Last 30 Days)" %}',
                    font: { size: 16, weight: '600' },
                    color: '#343a40'
                }
            },
            scales: {
                x: {
                    type: 'time',
                    time: {
                        unit: 'day',
                        tooltipFormat: 'MMM D',
                        displayFormats: {
                            day: 'MMM D'
                        }
                    },
                    title: { display: true, text: '{% trans "Date" %}', font: { size: 11 } },
                    grid: { display: false }
                },
                y: {
                    beginAtZero: true,
                    title: { display: true, text: '{% trans "New Applications" %}', font: { size: 11 } },
                    ticks: { precision: 0 },
                    grid: { color: '#e5e7eb' }
                }
            }
        }
    });

</script>

{% endblock %}