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

{% block title %}Candidate Tier Management - {{ job.title }} - 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; /* Used for Exam stages (Pending status) */
        --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 tier control block (consistent with .filter-controls) */
    .tier-controls {
        background-color: var(--kaauh-border); /* Light background for control sections */
        border-radius: 0.75rem;
        padding: 1.25rem;
        margin-bottom: 2rem;
        border: 1px solid var(--kaauh-border);
    }
    .tier-controls .form-row {
        display: flex;
        align-items: end;
        gap: 1rem;
    }
    .tier-controls .form-group {
        flex: 1;
        margin-bottom: 0;
    }

    /* 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 Bulk Pass button */
    .btn-bulk-pass {
        background-color: var(--kaauh-success);
        border-color: var(--kaauh-success);
        color: white;
        font-weight: 500;
    }
    .btn-bulk-pass:hover {
        background-color: #1e7e34;
        border-color: #1e7e34;
    }
    /* Style for Bulk Fail button */
    .btn-bulk-fail {
        background-color: var(--kaauh-danger);
        border-color: var(--kaauh-danger);
        color: white;
        font-weight: 500;
    }
    .btn-bulk-fail:hover {
        background-color: #bd2130;
        border-color: #bd2130;
    }

    /* 3. Input and Button Height Optimization (Thin look) */
    .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 inputs and buttons */
        height: 28px !important;
        font-size: 0.8rem !important;
    }
    .btn-main-action.btn-sm { font-weight: 600 !important; }

    /* Container for the timeline include */
    .applicant-tracking-timeline {
        margin-bottom: 2rem;
    }

    /* 4. Candidate Table Styling (KAAT-S Look) */
    .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;
        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;
        border-bottom: 1px solid var(--kaauh-border);
        vertical-align: middle;
        font-size: 0.9rem;
    }
    .candidate-table tbody tr:hover {
        background-color: #f1f3f4;
    }
    .candidate-name {
        font-weight: 600;
        color: var(--kaauh-primary-text);
    }
    .candidate-details {
        font-size: 0.8rem;
        color: #6c757d;
    }
    .candidate-table-responsive {
        overflow-x: auto;
        margin-bottom: 1rem;
    }

    /* 5. Badges */
    .ai-score-badge {
        background-color: var(--kaauh-teal-dark) !important;
        color: white;
        font-weight: 700;
        padding: 0.4em 0.8em;
        border-radius: 0.4rem;
        font-size: 0.8rem;
    }
    .status-badge { /* Used for Exam Status (Passed/Failed/Pending) */
        font-size: 0.75rem;
        padding: 0.3em 0.7em;
        border-radius: 0.35rem;
        font-weight: 700;
        text-transform: uppercase;
        display: inline-block;
    }
    .bg-success { background-color: var(--kaauh-success) !important; color: white; }
    .bg-danger { background-color: var(--kaauh-danger) !important; color: white; }
    .bg-info-pending { background-color: var(--kaauh-info) !important; color: white; }

    .tier-badge { /* Used for Tier labels */
        font-size: 0.75rem;
        padding: 0.125rem 0.5rem;
        border-radius: 0.5rem;
        font-weight: 600;
        margin-left: 0.5rem;
        display: inline-block;
    }
    .tier-1-badge { background-color: var(--kaauh-success); color: white; }
    .tier-2-badge { background-color: var(--kaauh-warning); color: #856404; }
    .tier-3-badge { background-color: #d1ecf1; color: #0c5460; }

    /* Fix table column widths for better layout */
    .candidate-table th:nth-child(1) { width: 40px; } /* Checkbox */
    .candidate-table th:nth-child(4) { width: 10%; } /* AI Score */
    .candidate-table th:nth-child(5) { width: 12%; } /* Exam Status */
    .candidate-table th:nth-child(6) { width: 15%; } /* Exam Date */
    .candidate-table th:nth-child(7) { width: 220px; } /* Actions */

    .cd_exam{
        color: #00636e;
    }
</style>
{% endblock %}

{% block content %}
<div class="container-fluid py-4">
    <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-edit me-2"></i>
                {% trans "Exam Management" %} - {{ job.title }}
            </h1>
            <h2 class="h5 text-muted mb-0">
                {% trans "Candidates in Exam Stage:" %} <span class="fw-bold">{{ total_candidates }}</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>

    {# APPLICANT TRACKING TIMELINE INCLUSION #}
    <div class="applicant-tracking-timeline">
        {% include 'jobs/partials/applicant_tracking.html' %}
    </div>
    {# END APPLICANT TRACKING TIMELINE INCLUSION #}

    {% comment %} <div class="tier-controls kaauh-card shadow-sm">
        <h4 class="h6 mb-3 fw-bold" style="color: var(--kaauh-teal-dark);">
            <i class="fas fa-sort-amount-up me-1"></i> {% trans "Define Top Candidates (Tiers)" %}
        </h4>
        <form method="post" class="mb-0">
            {% csrf_token %}
            <div class="row g-3 align-items-end">
                <div class="col-md-3 col-sm-6">
                    <label for="tier1_count" class="form-label small text-muted mb-1">
                        {% trans "Number of Tier 1 Candidates (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 }}" placeholder="e.g., 50">
                </div>
                <div class="col-md-3 col-sm-6">
                    <button type="submit" name="update_tiers" class="btn btn-main-action btn-sm w-100">
                        <i class="fas fa-sync-alt me-1"></i> {% trans "Update Tiers" %}
                    </button>
                </div>
                <div class="col-md-6 d-none d-md-block"></div>
            </div>
        </form> {% endcomment %}
    </div>

    <h2 class="h4 mb-3" style="color: var(--kaauh-primary-text);">
        {% trans "Candidate List" %}
        <span class="badge bg-primary-theme ms-2">{{ candidates|length }} / {{ total_candidates }} Total</span>
        <small class="text-muted fw-normal ms-2">(Sorted by AI Score)</small>
    </h2>

    <div class="kaauh-card shadow-sm p-3">
        <div class="candidate-table-responsive" data-signals__ifmissing="{_fetching: false, selections: Array({{ candidates|length }}).fill(false)}">
            <div class="col-md-3 col-sm-6 mb-3 d-flex gap-2">
                {% 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="Applied">
                                <i class="fas fa-arrow-left me-1"></i> {% trans "Apply" %}
                            </option>
                            <option value="Interview">
                                <i class="fas fa-arrow-right me-1"></i> {% trans "Interview" %}
                            </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>

            <form id="candidate-form" 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 "Name" %}</th>
                            <th>{% trans "Contact" %}</th>
                            <th class="text-center">{% trans "AI Score" %}</th>
                            <th class="text-center">{% trans "Exam Status" %}</th>
                            <th>{% trans "Exam Date" %}</th>
                            <th>{% 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>
                                    <div class="candidate-name">
                                        {{ candidate.name }}
                                        {# Tier logic updated to be cleaner #}
                                        {% if forloop.counter <= tier1_count %}
                                            <span class="stage-badge tier-1-badge">Tier 1</span>
                                        {% elif forloop.counter <= tier1_count|default:0|add:tier1_count %}
                                            <span class="stage-badge tier-2-badge">Tier 2</span>
                                        {% else %}
                                            <span class="stage-badge tier-3-badge">Tier 3+</span>
                                        {% endif %}
                                    </div>
                                </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 class="text-center">
                                    {% if candidate.exam_status == "Passed" %}
                                        <span class="status-badge bg-success">{{ candidate.exam_status }}</span>
                                    {% elif candidate.exam_status == "Failed" %}
                                        <span class="status-badge bg-danger">{{ candidate.exam_status }}</span>
                                    {% else %}
                                        <span class="status-badge bg-info-pending">Pending</span>
                                    {% endif %}
                                </td>
                                <td>
                                    {{candidate.exam_date|date:"M d, Y h:i A"|default:"N/A"}}
                                </td>
                                <td class="d-flex flex-wrap gap-1">
                                    <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 Profile">
                                        <i class="fas fa-eye"></i> View
                                    </button>
                                    <button type="button" class="btn btn-main-action btn-sm"
                                        data-bs-toggle="modal"
                                        data-bs-target="#candidateviewModal"
                                        hx-get="{% url 'update_candidate_exam_status' candidate.slug %}"
                                        hx-target="#candidateviewModalBody"
                                        title="Set Exam Status/Date">
                                        <i class="fas fa-calendar-alt"></i> Set Exam
                                    </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 are currently in the Exam stage for this job." %}
                    </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 Details & Exam Update" %}
                </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 %}