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

{% block title %}Candidate Management - {{ job.title }} - University ATS{% endblock %}

{% block customCSS %}
<style>
    /* KAAT-S UI Variables */
    :root {
        --kaauh-teal: #00636e;
        --kaauh-teal-dark: #004a53;
        --kaauh-border: #eaeff3;
        --kaauh-primary-text: #343a40;
        --kaauh-success: #28a745;
        --kaauh-info: #17a2b8;
        --kaauh-danger: #dc3545;
        --kaauh-warning: #ffc107;
    }

    /* Primary Color Overrides */
    .text-primary-theme { color: var(--kaauh-teal) !important; }
    .bg-primary-theme { background-color: var(--kaauh-teal) !important; }

    /* 1. Main Container & Card Styling */
    .kaauh-card {
        border: 1px solid var(--kaauh-border);
        border-radius: 0.75rem;
        box-shadow: 0 4px 12px rgba(0,0,0,0.06);
        background-color: white;
    }

    /* Dedicated style for the filter block */
    .filter-controls {
        background-color: #f8f9fa;
        border-radius: 0.75rem;
        padding: 1.5rem;
        margin-bottom: 2rem;
        border: 1px solid var(--kaauh-border);
    }

    /* 2. Button Styling (Themed for Main Actions) */
    .btn-main-action {
        background-color: var(--kaauh-teal);
        border-color: var(--kaauh-teal);
        color: white;
        font-weight: 600;
        transition: all 0.2s ease;
    }
    .btn-main-action:hover {
        background-color: var(--kaauh-teal-dark);
        border-color: var(--kaauh-teal-dark);
        box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    }
    .btn-outline-secondary {
        color: var(--kaauh-teal-dark);
        border-color: var(--kaauh-teal);
    }
    .btn-outline-secondary:hover {
        background-color: var(--kaauh-teal-dark);
        color: white;
        border-color: var(--kaauh-teal-dark);
    }
    /* Style for the Bulk Move button */
    .btn-bulk-action {
        background-color: var(--kaauh-teal-dark);
        border-color: var(--kaauh-teal-dark);
        color: white;
        font-weight: 500;
    }
    .btn-bulk-action:hover {
        background-color: #00363e;
        border-color: #00363e;
    }

    /* 3. Candidate Table Styling (Aligned with KAAT-S) */
    .candidate-table {
        table-layout: fixed;
        width: 100%;
        border-collapse: separate;
        border-spacing: 0;
        background-color: white;
        border-radius: 0.5rem;
        overflow: hidden;
    }
    .candidate-table thead {
        background-color: var(--kaauh-border);
    }
    .candidate-table th {
        padding: 0.75rem 1rem;
        font-weight: 600;
        color: var(--kaauh-teal-dark);
        border-bottom: 2px solid var(--kaauh-teal);
        font-size: 0.9rem;
        vertical-align: middle;
    }
    .candidate-table td {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--kaauh-border);
        vertical-align: middle;
        font-size: 0.9rem;
    }
    .candidate-table tbody tr:hover {
        background-color: #f1f3f4;
    }
    .candidate-table thead th:nth-child(1) { width: 40px; }
    .candidate-table thead th:nth-child(4) { width: 10%; }
    .candidate-table thead th:nth-child(7) { width: 100px; }

    .candidate-name {
        font-weight: 600;
        color: var(--kaauh-primary-text);
    }
    .candidate-details {
        font-size: 0.8rem;
        color: #6c757d;
    }

    /* 4. Badges and Statuses */
    .ai-score-badge {
        background-color: var(--kaauh-teal-dark) !important;
        color: white;
        font-weight: 700;
        padding: 0.4em 0.8em;
        border-radius: 0.4rem;
    }
    .status-badge {
        font-size: 0.75rem;
        padding: 0.3em 0.7em;
        border-radius: 0.35rem;
        font-weight: 700;
    }
    .bg-applicant { background-color: #6c757d !important; color: white; }
    .bg-candidate { background-color: var(--kaauh-success) !important; color: white; }

    /* Stage Badges */
    .stage-badge {
        font-size: 0.75rem;
        padding: 0.25rem 0.6rem;
        border-radius: 0.3rem;
        font-weight: 600;
        display: inline-block;
        margin-bottom: 0.2rem;
    }
    .stage-Applied { background-color: #e9ecef; color: #495057; }
    .stage-Screening { background-color: var(--kaauh-info); color: white; }
    .stage-Exam { background-color: var(--kaauh-warning); color: #856404; }
    .stage-Interview { background-color: #17a2b8; color: white; }
    .stage-Offer { background-color: var(--kaauh-success); color: white; }

    /* Timeline specific container */
    .applicant-tracking-timeline {
        margin-bottom: 2rem;
    }

    /* --- CUSTOM HEIGHT OPTIMIZATION (MAKING INPUTS/BUTTONS SMALLER) --- */
    .form-control-sm,
    .btn-sm {
        /* Reduce vertical padding even more than default Bootstrap 'sm' */
        padding-top: 0.2rem !important;
        padding-bottom: 0.2rem !important;
        /* Ensure a consistent, small height for both */
        height: 28px !important;
        font-size: 0.8rem !important; /* Slightly smaller font */
    }

    .cd_screening{
        color: #00636e;

    }

</style>
{% endblock %}

{% block content %}

<div class="container-fluid py-4">
     <div class="applicant-tracking-timeline">
        {% include 'jobs/partials/applicant_tracking.html' %}
    </div>

    <div class="d-flex justify-content-between align-items-center mb-4">
        <div>
            <h1 class="h3 mb-1" style="color: var(--kaauh-teal-dark); font-weight: 700;">
                <i class="fas fa-layer-group me-2"></i>
                {% trans "Applicant Screening" %}
            </h1>
            <h2 class="h5 text-muted mb-0">
                {% trans "Job:" %} {{ job.title }}
                <span class="badge bg-secondary ms-2 fw-normal">{{ job.internal_job_id }}</span>
            </h2>
        </div>
        <a href="{% url 'job_detail' job.slug %}" class="btn btn-outline-secondary">
            <i class="fas fa-arrow-left me-1"></i> {% trans "Back to Job" %}
        </a>
    </div>

    <div class="filter-controls shadow-sm">
        <h4 class="h6 mb-3 fw-bold" style="color: var(--kaauh-primary-text);">
            <i class="fas fa-sort-numeric-up me-1"></i> {% trans "AI Scoring & Top Candidate Filter" %}
        </h4>

      <form method="GET" class="mb-0 pb-3">
    {% csrf_token %}
    <div class="d-flex flex-nowrap g-3 align-items-end" style="overflow-x: auto;">

        <div class="p-2">
            <label for="min_ai_score" class="form-label small text-muted mb-1">
                {% trans "Min AI Score" %}
            </label>
            <input type="number" name="min_ai_score" id="min_ai_score" class="form-control form-control-sm"
                   value="{{ min_ai_score}}" min="0" max="100" step="1"
                   placeholder="e.g., 75" style="min-width: 120px;">
        </div>

        <div class="p-2">
            <label for="tier1_count" class="form-label small text-muted mb-1">
                {% trans "Top N" %}
            </label>
            <input type="number" name="tier1_count" id="tier1_count" class="form-control form-control-sm"
                   value="{{ tier1_count }}" min="1" max="{{ total_candidates }}" style="min-width: 100px;">
        </div>

        <div class="p-2">
            <label class="form-label small text-muted mb-1 d-block">&nbsp;</label>
            <button type="submit" name="update_tiers" class="btn btn-main-action btn-sm w-100" style="min-width: 150px;">
                <i class="fas fa-sync-alt me-1"></i> {% trans "Update Filters" %}
            </button>
        </div>
    </div>
</form>
    </div>

    <h2 class="h4 mb-3" style="color: var(--kaauh-primary-text);">
        <i class="fas fa-users me-1"></i> {% trans "Candidate List" %}
        <span class="badge bg-primary-theme ms-2">{{ candidates|length }} / {{ total_candidates }} Total</span>
    </h2>

    <div class="kaauh-card shadow-sm p-3">
        {% if candidates %}
            <form hx-boost="true" hx-include="#candidate-form" action="{% url 'candidate_update_status' job.slug %}" method="post">
                <div class="d-flex align-items-center">
                    <select name="mark_as" id="update_status" class="form-select form-select-sm" style="height: 3rem;">
                        <option value="Exam">
                            <i class="fas fa-arrow-right me-1"></i> {% trans "Exam" %}
                        </option>
                    </select>
                    <button type="submit" class="btn btn-main-action btn-mds ms-2">
                        <i class="fas fa-arrow-right me-1"></i> {% trans "Update" %}
                    </button>
                </div>
            </form>
        {% endif %}

        <div class="table-responsive">
            <form id="candidate-form" action="{% url 'candidate_update_status' job.slug %}" method="post">
                {% csrf_token %}
                <table class="table candidate-table align-middle">
                    <thead>
                        <tr>
                            <th>
                                {% if candidates %}
                                    <div class="form-check">
                                        <input
                                        type="checkbox" class="form-check-input" id="selectAllCheckbox">
                                    </div>
                                {% endif %}
                            </th>
                            <th>{% trans "Candidate Name" %}</th>
                            <th>{% trans "Contact Info" %}</th>
                            <th class="text-center">{% trans "AI Score" %}</th>
                            <th>{% trans "Application Status" %}</th>
                            <th>{% trans "Current Stage" %}</th>
                            <th class="text-center">{% trans "Actions" %}</th>
                        </tr>
                    </thead>
                    <tbody>
                        {% for candidate in candidates %}
                        <tr>
                            <td>
                                <div class="form-check">
                                    <input
                                    name="candidate_ids"
                                    value="{{ candidate.id }}"
                                    type="checkbox" class="form-check-input rowCheckbox" id="candidate-{{ candidate.id }}">
                                </div>
                            </td>
                            <td>
                                <a href="#" class="candidate-name text-primary-theme text-decoration-none">
                                    {{ candidate.name }}
                                </a>
                            </td>
                            <td>
                                <div class="candidate-details">
                                    <i class="fas fa-envelope me-1"></i> {{ candidate.email }}<br>
                                    <i class="fas fa-phone me-1"></i> {{ candidate.phone }}
                                </div>
                            </td>
                            <td class="text-center">
                                <span class="badge ai-score-badge">
                                    {{ candidate.match_score|default:"0" }}%
                                </span>
                            </td>
                            <td>
                                <span class="badge status-badge {% if candidate.applicant_status == 'Candidate' %}bg-candidate{% else %}bg-applicant{% endif %}">
                                    {{ candidate.get_applicant_status_display }}
                                </span>
                            </td>
                            <td>
                                <span class="stage-badge stage-{{ candidate.stage }}">
                                    {{ candidate.get_stage_display }}
                                </span>
                                {% if candidate.stage == "Exam" and candidate.exam_status %}
                                <br>
                                <span class="stage-badge bg-info text-white">
                                    {{ candidate.get_exam_status_display }}
                                </span>
                                {% endif %}
                            </td>
                            <td class="text-center">
                                <button type="button" class="btn btn-outline-secondary btn-sm"
                                    data-bs-toggle="modal"
                                    data-bs-target="#candidateviewModal"
                                    hx-get="{% url 'candidate_criteria_view_htmx' candidate.pk %}"
                                    hx-target="#candidateviewModalBody"
                                    title="View Candidate Profile and Criteria">
                                    <i class="fas fa-eye"></i>
                                </button>
                            </td>
                        </tr>
                        {% endfor %}
                    </tbody>
                </table>
                {% if not candidates %}
                    <div class="alert alert-info text-center mt-3 mb-0" role="alert">
                        <i class="fas fa-info-circle me-1"></i>
                        {% trans "No candidates match the current stage and filter criteria." %}
                    </div>
                {% endif %}
            </form>
        </div>
    </div>

</div>

<div class="modal fade modal-lg" id="candidateviewModal" tabindex="-1" aria-labelledby="candidateviewModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content kaauh-card">
            <div class="modal-header" style="border-bottom: 1px solid var(--kaauh-border);">
                <h5 class="modal-title" id="candidateviewModalLabel" style="color: var(--kaauh-teal-dark);">
                    {% trans "Candidate Criteria Review" %}
                </h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div id="candidateviewModalBody" class="modal-body">
                <div class="text-center py-5 text-muted">
                    <i class="fas fa-spinner fa-spin fa-2x"></i><br>
                    {% trans "Loading candidate data..." %}
                </div>
            </div>
            <div class="modal-footer" style="border-top: 1px solid var(--kaauh-border);">
                <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">
                    {% trans "Close" %}
                </button>
            </div>
        </div>
    </div>
</div>
{% endblock %}


{% block customJS %}
<script>
    document.addEventListener('DOMContentLoaded', function () {
        const selectAllCheckbox = document.getElementById('selectAllCheckbox');
        const rowCheckboxes = document.querySelectorAll('.rowCheckbox');

        if (selectAllCheckbox) {

            // Function to safely update the header checkbox state
            function updateSelectAllState() {
                const checkedCount = Array.from(rowCheckboxes).filter(cb => cb.checked).length;
                const totalCount = rowCheckboxes.length;

                if (checkedCount === 0) {
                    selectAllCheckbox.checked = false;
                    selectAllCheckbox.indeterminate = false;
                } else if (checkedCount === totalCount) {
                    selectAllCheckbox.checked = true;
                    selectAllCheckbox.indeterminate = false;
                } else {
                    // Set to indeterminate state (partially checked)
                    selectAllCheckbox.checked = false;
                    selectAllCheckbox.indeterminate = true;
                }

                // IMPORTANT: We do NOT fire a change event here to prevent the infinite loop.
                // Your existing data-bind-_all logic should handle the bulk action status.
            }

            // 1. Logic for the 'Select All' checkbox (Clicking it updates all rows)
            selectAllCheckbox.addEventListener('change', function () {
                const isChecked = selectAllCheckbox.checked;

                // Temporarily disable the change listener on rows to prevent cascading events
                rowCheckboxes.forEach(checkbox => checkbox.removeEventListener('change', updateSelectAllState));

                // Update all row checkboxes
                rowCheckboxes.forEach(function (checkbox) {
                    checkbox.checked = isChecked;

                    // You must still dispatch the event here so your framework's data-bind-selections
                    // picks up the change on individual elements. This should NOT trigger the updateSelectAllState.
                    checkbox.dispatchEvent(new Event('change', { bubbles: true }));
                });

                // Re-attach the change listeners to the rows
                rowCheckboxes.forEach(checkbox => checkbox.addEventListener('change', updateSelectAllState));

                // Ensure the header state is correct after forcing all changes
                updateSelectAllState();
            });

            // 2. Logic to update 'Select All' state based on row checkboxes
            // Attach the function to be called whenever a row checkbox changes
            rowCheckboxes.forEach(function (checkbox) {
                checkbox.addEventListener('change', updateSelectAllState);
            });

            // Initial check to set the correct state on load (in case items are pre-checked)
            updateSelectAllState();
        }
    });
</script>
{% endblock %}