{% extends "base.html" %}

{% block title %}Gestión de Asignaturas - Edu-Space Admin{% endblock %}

{% block content %}
<div class="container-fluid pt-5 mt-4">
    <!-- Header -->
    <div class="d-flex flex-column flex-md-row justify-content-between align-items-md-center gap-3 mb-4">
        <div>
            <h1 class="h3 fw-bold mb-1">
                <i class="bi bi-book text-primary me-2"></i>Gestión de Asignaturas y Materias
            </h1>
            <p class="text-muted mb-0 small">
                Catálogo institucional de asignaturas, códigos, créditos académicos y carreras vinculadas.
            </p>
        </div>
        <div class="d-flex gap-2">
            {% if can_edit %}
            <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#modalAddSubject">
                <i class="bi bi-plus-lg me-1"></i>Nueva Asignatura
            </button>
            {% endif %}
            <a href="/admin/commissions_list" class="btn btn-outline-secondary">
                <i class="bi bi-diagram-3 me-1"></i>Ver Comisiones
            </a>
        </div>
    </div>

    <!-- Notification Alerts -->
    {% if msg == 'deleted' %}
    <div class="alert alert-success alert-dismissible fade show mb-4 shadow-sm" role="alert">
        <i class="bi bi-check-circle-fill me-2"></i>La asignatura ha sido eliminada permanentemente del sistema.
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>
    {% elif msg == 'deactivated' %}
    <div class="alert alert-warning alert-dismissible fade show mb-4 shadow-sm" role="alert">
        <i class="bi bi-exclamation-triangle-fill me-2"></i>La asignatura posee comisiones históricas asociadas. Por integridad de los registros académicos fue <strong>desactivada</strong>.
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>
    {% elif error == 'delete' %}
    <div class="alert alert-danger alert-dismissible fade show mb-4 shadow-sm" role="alert">
        <i class="bi bi-x-circle-fill me-2"></i>Ocurrió un error al procesar la eliminación de la asignatura.
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>
    {% endif %}

    <!-- Filters Bar -->
    <div class="card border-0 shadow-sm mb-4">
        <div class="card-body py-2">
            <form method="GET" class="row g-2 align-items-center">
                <!-- Buscador -->
                <div class="col-md-4">
                    <div class="input-group input-group-sm">
                        <span class="input-group-text bg-body-tertiary"><i class="bi bi-search"></i></span>
                        <input type="text" name="search" class="form-control" 
                               placeholder="Buscar por código, nombre o departamento..." 
                               value="{{ search }}">
                    </div>
                </div>

                <!-- Filtro Carrera -->
                <div class="col-md-4">
                    <div class="input-group input-group-sm">
                        <span class="input-group-text bg-body-tertiary"><i class="bi bi-mortarboard text-primary"></i></span>
                        <select name="career_id" class="form-select form-select-sm" onchange="this.form.submit()">
                            <option value="">Todas las carreras</option>
                            {% for c in careers %}
                                <option value="{{ c.id }}" {% if career_filter == c.id %}selected{% endif %}>{{ c.name }}</option>
                            {% endfor %}
                        </select>
                    </div>
                </div>

                <!-- Filtro Estado -->
                <div class="col-md-2">
                    <select name="active" class="form-select form-select-sm" onchange="this.form.submit()">
                        <option value="">Todos los estados</option>
                        <option value="true" {% if active_filter == 'true' %}selected{% endif %}>Solo activas</option>
                        <option value="false" {% if active_filter == 'false' %}selected{% endif %}>Solo inactivas</option>
                    </select>
                </div>

                <div class="col-md-2 text-md-end">
                    <button type="submit" class="btn btn-sm btn-primary me-1">
                        <i class="bi bi-funnel me-1"></i>Filtrar
                    </button>
                    <a href="/admin/subjects_list" class="btn btn-sm btn-outline-secondary">
                        <i class="bi bi-x-circle me-1"></i>Limpiar
                    </a>
                </div>
            </form>
        </div>
    </div>

    <!-- Subjects Table -->
    <div class="card border-0 shadow-sm">
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0">
                <thead class="table-light">
                    <tr>
                        <th>Código</th>
                        <th>Nombre de la Asignatura</th>
                        <th>Carrera</th>
                        <th>Departamento</th>
                        <th>Créditos</th>
                        <th>Comisiones</th>
                        <th>Estado</th>
                        {% if can_edit %}
                        <th class="text-end">Acciones</th>
                        {% endif %}
                    </tr>
                </thead>
                <tbody>
                    {% for s in subjects %}
                    <tr>
                        <td>
                            <span class="badge font-monospace bg-primary-subtle text-primary border">{{ s.code }}</span>
                        </td>
                        <td>
                            <span class="fw-bold text-body">{{ s.name }}</span>
                            {% if s.description %}
                            <small class="text-muted d-block text-truncate" style="max-width: 300px;">{{ s.description }}</small>
                            {% endif %}
                        </td>
                        <td>
                            {% if s.career_obj %}
                            <span class="badge bg-secondary-subtle text-secondary border">
                                <i class="bi bi-mortarboard me-1"></i>{{ s.career_obj.name }}
                            </span>
                            {% else %}
                            <span class="text-muted small">General</span>
                            {% endif %}
                        </td>
                        <td>
                            <span class="small text-muted">{{ s.department or '-' }}</span>
                        </td>
                        <td>
                            <span class="badge bg-light text-dark border">{{ s.credits }} cr.</span>
                        </td>
                        <td>
                            <span class="badge bg-info-subtle text-info border">
                                <i class="bi bi-diagram-3 me-1"></i>{{ s.commissions|length if s.commissions else 0 }}
                            </span>
                        </td>
                        <td>
                            <span class="badge rounded-pill {% if s.is_active %}bg-success-subtle text-success border border-success-subtle{% else %}bg-secondary-subtle text-secondary border{% endif %}">
                                {% if s.is_active %}Activa{% else %}Inactiva{% endif %}
                            </span>
                        </td>
                        {% if can_edit %}
                        <td class="text-end">
                            <div class="btn-group btn-group-sm">
                                <button type="button" class="btn btn-outline-secondary py-0 px-2" 
                                        data-bs-toggle="modal" data-bs-target="#modalEditSubject" 
                                        data-id="{{ s.id }}"
                                        data-code="{{ s.code }}"
                                        data-name="{{ s.name }}"
                                        data-credits="{{ s.credits }}"
                                        data-career-id="{{ s.career_id or '' }}"
                                        data-department="{{ s.department or '' }}"
                                        data-description="{{ s.description or '' }}"
                                        data-active="{{ 'true' if s.is_active else 'false' }}"
                                        title="Editar Asignatura">
                                    <i class="bi bi-pencil"></i>
                                </button>
                                <form method="POST" action="/admin/subject_toggle" class="d-inline">
                                    <input type="hidden" name="id" value="{{ s.id }}">
                                    <button type="submit" class="btn btn-outline-warning py-0 px-2" 
                                            title="{% if s.is_active %}Desactivar{% else %}Activar{% endif %}">
                                        <i class="bi {% if s.is_active %}bi-pause{% else %}bi-play{% endif %}"></i>
                                    </button>
                                </form>
                                <button type="button" class="btn btn-outline-danger py-0 px-2" 
                                        data-bs-toggle="modal" data-bs-target="#modalDeleteSubject" 
                                        data-id="{{ s.id }}"
                                        data-code="{{ s.code }}"
                                        data-name="{{ s.name }}"
                                        title="Eliminar Asignatura">
                                    <i class="bi bi-trash"></i>
                                </button>
                            </div>
                        </td>
                        {% endif %}
                    </tr>
                    {% else %}
                    <tr>
                        <td colspan="8" class="text-center py-5 text-muted">
                            <i class="bi bi-book fs-1 d-block mb-2"></i>
                            No se encontraron asignaturas con los criterios indicados.
                        </td>
                    </tr>
                    {% endfor %}
                </tbody>
            </table>
        </div>

        <!-- Paginación -->
        {% if pagination.pages > 1 %}
        <div class="card-footer bg-body-tertiary border-0 py-2">
            <nav aria-label="Subjects pagination">
                <ul class="pagination pagination-sm justify-content-center mb-0">
                    {% if pagination.has_prev %}
                    <li class="page-item">
                        <a class="page-link" href="/admin/subjects_list">Anterior</a>
                    </li>
                    {% endif %}
                    
                    {% for p in pagination.iter_pages(left_edge=2, right_edge=2, left_current=2, right_current=2) %}
                        {% if p %}
                            <li class="page-item {% if p == pagination.page %}active{% endif %}">
                                <a class="page-link" href="/admin/subjects_list">{{ p }}</a>
                            </li>
                        {% else %}
                            <li class="page-item disabled"><span class="page-link">…</span></li>
                        {% endif %}
                    {% endfor %}
                    
                    {% if pagination.has_next %}
                    <li class="page-item">
                        <a class="page-link" href="/admin/subjects_list">Siguiente</a>
                    </li>
                    {% endif %}
                </ul>
            </nav>
        </div>
        {% endif %}
    </div>
</div>

<!-- Modal Nueva Asignatura -->
{% if can_edit %}
<div class="modal fade" id="modalAddSubject" tabindex="-1" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <form method="POST" action="/admin/subject_add">
                <div class="modal-header">
                    <h5 class="modal-title h6 fw-bold">
                        <i class="bi bi-book text-primary me-2"></i>Nueva Asignatura
                    </h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body">
                    <div class="row g-2 mb-3">
                        <div class="col-md-5">
                            <label class="form-label small fw-semibold">Código *</label>
                            <input type="text" name="code" class="form-control form-control-sm font-monospace" placeholder="ej. ASIG0015" required>
                        </div>
                        <div class="col-md-7">
                            <label class="form-label small fw-semibold">Créditos</label>
                            <input type="number" name="credits" class="form-control form-control-sm" value="4" min="1" max="20">
                        </div>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Nombre de la Asignatura *</label>
                        <input type="text" name="name" class="form-control form-control-sm" placeholder="ej. Álgebra Lineal" required>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Carrera Vinculada</label>
                        <select name="career_id" class="form-select form-select-sm">
                            <option value="">Sin carrera específica (General)</option>
                            {% for c in careers %}
                                <option value="{{ c.id }}">{{ c.name }}</option>
                            {% endfor %}
                        </select>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Departamento / Área</label>
                        <input type="text" name="department" class="form-control form-control-sm" placeholder="ej. Ciencias Exactas, Informática">
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Descripción</label>
                        <textarea name="description" class="form-control form-control-sm" rows="2" placeholder="Programa de la materia..."></textarea>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-sm btn-secondary" data-bs-dismiss="modal">Cancelar</button>
                    <button type="submit" class="btn btn-sm btn-primary">Crear Asignatura</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Modal Editar Asignatura (Global fuera de la tabla para evitar problemas de visualización) -->
<div class="modal fade" id="modalEditSubject" tabindex="-1" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <form method="POST" action="/admin/subject_edit" id="formEditSubject">
                <input type="hidden" name="id" id="editSubjectId">
                <div class="modal-header">
                    <h5 class="modal-title h6 fw-bold">
                        <i class="bi bi-pencil-square text-primary me-2"></i>Editar Asignatura
                    </h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body">
                    <div class="row g-2 mb-3">
                        <div class="col-md-5">
                            <label class="form-label small fw-semibold">Código *</label>
                            <input type="text" name="code" id="editSubjectCode" class="form-control form-control-sm font-monospace" required>
                        </div>
                        <div class="col-md-7">
                            <label class="form-label small fw-semibold">Créditos</label>
                            <input type="number" name="credits" id="editSubjectCredits" class="form-control form-control-sm" min="1" max="20">
                        </div>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Nombre de la Asignatura *</label>
                        <input type="text" name="name" id="editSubjectName" class="form-control form-control-sm" required>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Carrera Vinculada</label>
                        <select name="career_id" id="editSubjectCareer" class="form-select form-select-sm">
                            <option value="">Sin carrera específica (General)</option>
                            {% for c in careers %}
                                <option value="{{ c.id }}">{{ c.name }}</option>
                            {% endfor %}
                        </select>
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Departamento / Área</label>
                        <input type="text" name="department" id="editSubjectDept" class="form-control form-control-sm">
                    </div>
                    <div class="mb-3">
                        <label class="form-label small fw-semibold">Descripción / Objetivos</label>
                        <textarea name="description" id="editSubjectDesc" class="form-control form-control-sm" rows="2"></textarea>
                    </div>
                    <div class="form-check">
                        <input class="form-check-input" type="checkbox" name="is_active" id="editSubjectActive">
                        <label class="form-check-label small" for="editSubjectActive">Asignatura Activa</label>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-sm btn-secondary" data-bs-dismiss="modal">Cancelar</button>
                    <button type="submit" class="btn btn-sm btn-primary">Guardar Cambios</button>
                </div>
            </form>
        </div>
    </div>
</div>

<!-- Modal Eliminar Asignatura -->
<div class="modal fade" id="modalDeleteSubject" tabindex="-1" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
        <div class="modal-content">
            <form method="POST" action="/admin/subject_delete">
                <input type="hidden" name="id" id="deleteSubjectId">
                <div class="modal-header bg-danger text-white">
                    <h5 class="modal-title h6 fw-bold">
                        <i class="bi bi-exclamation-triangle-fill me-2"></i>Eliminar Asignatura
                    </h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body py-4">
                    <p class="mb-2">¿Estás seguro de que deseas eliminar la asignatura <strong id="deleteSubjectName"></strong> (<span class="font-monospace" id="deleteSubjectCode"></span>)?</p>
                    <div class="alert alert-warning small mb-0">
                        <i class="bi bi-info-circle me-1"></i>
                        <strong>Aviso de integridad:</strong> Si la materia no posee comisiones vinculadas se eliminará permanentemente. Si ya posee comisiones históricas o cursadas, el sistema la <strong>desactivará automáticamente</strong> para resguardar las actas académicas.
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-sm btn-secondary" data-bs-dismiss="modal">Cancelar</button>
                    <button type="submit" class="btn btn-sm btn-danger">Confirmar Eliminación</button>
                </div>
            </form>
        </div>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    // Populate Edit Subject Modal
    var modalEdit = document.getElementById('modalEditSubject');
    if (modalEdit) {
        modalEdit.addEventListener('show.bs.modal', function(event) {
            var btn = event.relatedTarget;
            if (!btn) return;
            document.getElementById('editSubjectId').value = btn.getAttribute('data-id') || '';
            document.getElementById('editSubjectCode').value = btn.getAttribute('data-code') || '';
            document.getElementById('editSubjectName').value = btn.getAttribute('data-name') || '';
            document.getElementById('editSubjectCredits').value = btn.getAttribute('data-credits') || '4';
            document.getElementById('editSubjectCareer').value = btn.getAttribute('data-career-id') || '';
            document.getElementById('editSubjectDept').value = btn.getAttribute('data-department') || '';
            document.getElementById('editSubjectDesc').value = btn.getAttribute('data-description') || '';
            document.getElementById('editSubjectActive').checked = (btn.getAttribute('data-active') === 'true');
        });
    }

    // Populate Delete Subject Modal
    var modalDel = document.getElementById('modalDeleteSubject');
    if (modalDel) {
        modalDel.addEventListener('show.bs.modal', function(event) {
            var btn = event.relatedTarget;
            if (!btn) return;
            document.getElementById('deleteSubjectId').value = btn.getAttribute('data-id') || '';
            document.getElementById('deleteSubjectCode').textContent = btn.getAttribute('data-code') || '';
            document.getElementById('deleteSubjectName').textContent = btn.getAttribute('data-name') || '';
        });
    }
});
</script>
{% endif %}
{% endblock %}