<?php
session_start();

$userRole = $_SESSION['user_role'] ?? '';
if (!isset($_SESSION['user_id']) || ($userRole !== 'Administrador' && $userRole !== 'admin')) {
    header('Location: dashboard.php');
    exit;
}

require_once 'db/config.php';
$pdo = db();

$schemaInitError = null;
require_once 'includes/hr_bootstrap.php';
try {
    hr_ensure_schema($pdo);
} catch (Throwable $e) {
    $schemaInitError = $e->getMessage();
}

$pageTitle = "Recursos Humanos - Colaboradores";
$pageDescription = "Gestión del personal: registro, área, cargo y estado.";

$areasValidas = ['Ventas', 'Almacén', 'Marketing', 'Administración', 'Finanzas', 'Gerencia'];
$estadosValidos = ['Activo', 'Inactivo', 'Suspendido'];

$notice = null;
$noticeType = 'success';

if (!empty($schemaInitError)) {
    $notice = 'Error al preparar las tablas de Recursos Humanos.';
    $noticeType = 'danger';
    error_log('HR schema init error (colaboradores): ' . $schemaInitError);
}

if (isset($_GET['success']) && $_GET['success'] === '1') {
    $notice = 'Colaborador guardado correctamente.';
    $noticeType = 'success';
}
if (isset($_GET['estado_updated']) && $_GET['estado_updated'] === '1') {
    $notice = 'Estado actualizado correctamente.';
    $noticeType = 'success';
}

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = $_POST['action'] ?? '';

    if ($action === 'add_colaborador') {
        try {
            $nombre_completo = trim((string)($_POST['nombre_completo'] ?? ''));
            $dni = trim((string)($_POST['dni'] ?? ''));
            $celular = trim((string)($_POST['celular'] ?? ''));
            $correo = trim((string)($_POST['correo'] ?? ''));
            $area = (string)($_POST['area'] ?? '');
            $cargo = trim((string)($_POST['cargo'] ?? ''));
            $fecha_ingreso = $_POST['fecha_ingreso'] ?? date('Y-m-d');
            $estado = (string)($_POST['estado'] ?? 'Activo');
            $observaciones = trim((string)($_POST['observaciones'] ?? ''));

            if ($nombre_completo === '' || $dni === '' || $celular === '' || $correo === '' || $cargo === '' || $area === '') {
                throw new RuntimeException('Faltan campos obligatorios.');
            }
            if (!filter_var($correo, FILTER_VALIDATE_EMAIL)) {
                throw new RuntimeException('Correo inválido.');
            }
            if (!in_array($area, $areasValidas, true)) {
                throw new RuntimeException('Área inválida.');
            }
            if (!in_array($estado, $estadosValidos, true)) {
                throw new RuntimeException('Estado inválido.');
            }

            $stmt = $pdo->prepare('INSERT INTO hr_colaboradores (nombre_completo, dni, celular, correo, area, cargo, fecha_ingreso, estado, observaciones) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)');
            $stmt->execute([
                $nombre_completo,
                $dni,
                $celular,
                $correo,
                $area,
                $cargo,
                $fecha_ingreso,
                $estado,
                $observaciones,
            ]);

            header('Location: hr_colaboradores.php?success=1');
            exit;
        } catch (Throwable $e) {
            $notice = 'No se pudo guardar el colaborador: ' . htmlspecialchars($e->getMessage(), ENT_QUOTES, 'UTF-8');
            $noticeType = 'danger';
        }
    }

    if ($action === 'update_colaborador_estado') {
        try {
            $id = (int)($_POST['id'] ?? 0);
            $nuevoEstado = (string)($_POST['estado'] ?? '');

            if ($id <= 0) {
                throw new RuntimeException('ID inválido.');
            }
            if (!in_array($nuevoEstado, $estadosValidos, true)) {
                throw new RuntimeException('Estado inválido.');
            }

            $stmt = $pdo->prepare('UPDATE hr_colaboradores SET estado = ? WHERE id = ?');
            $stmt->execute([$nuevoEstado, $id]);

            header('Location: hr_colaboradores.php?estado_updated=1');
            exit;
        } catch (Throwable $e) {
            $notice = 'No se pudo actualizar el estado.';
            $noticeType = 'danger';
        }
    }
}

// --- Filtros ---
$filter_area = (string)($_GET['area'] ?? 'Todas');
$filter_estado = (string)($_GET['estado'] ?? 'Todos');
$search = trim((string)($_GET['q'] ?? ''));

if ($filter_area !== 'Todas' && !in_array($filter_area, $areasValidas, true)) {
    $filter_area = 'Todas';
}

if ($filter_estado !== 'Todos' && !in_array($filter_estado, $estadosValidos, true)) {
    $filter_estado = 'Todos';
}

$where = [];
$params = [];

if ($filter_area !== 'Todas') {
    $where[] = 'area = ?';
    $params[] = $filter_area;
}

if ($filter_estado !== 'Todos') {
    $where[] = 'estado = ?';
    $params[] = $filter_estado;
}

if ($search !== '') {
    $where[] = '(nombre_completo LIKE ? OR dni LIKE ? OR cargo LIKE ?)';
    $like = '%' . $search . '%';
    $params[] = $like;
    $params[] = $like;
    $params[] = $like;
}

$sql = 'SELECT id, nombre_completo, dni, celular, correo, area, cargo, fecha_ingreso, estado, observaciones FROM hr_colaboradores';
if (!empty($where)) {
    $sql .= ' WHERE ' . implode(' AND ', $where);
}
$sql .= ' ORDER BY fecha_ingreso DESC, id DESC';

$colaboradores = [];
try {
    $stmt = $pdo->prepare($sql);
    $stmt->execute($params);
    $colaboradores = $stmt->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
    error_log('HR Colaboradores DB error: ' . $e->getMessage());
    $notice = 'No se pudo cargar la lista de colaboradores.';
    $noticeType = 'danger';
}


$fechaHoy = date('Y-m-d');

include 'layout_header.php';
?>

<div class="container-fluid mt-4">
    <?php if ($notice): ?>
        <div class="alert alert-<?= htmlspecialchars($noticeType, ENT_QUOTES, 'UTF-8'); ?> mb-4" role="alert">
            <?= $notice; ?>
        </div>
    <?php endif; ?>

    <div class="row g-4">
        <div class="col-lg-4">
            <div class="card shadow-sm">
                <div class="card-header bg-light">
                    <h2 class="h5 mb-0">Nuevo Colaborador</h2>
                </div>
                <div class="card-body">
                    <form method="POST">
                        <input type="hidden" name="action" value="add_colaborador">

                        <div class="mb-3">
                            <label class="form-label">Nombre Completo</label>
                            <input type="text" name="nombre_completo" class="form-control" required>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">DNI</label>
                            <input type="text" name="dni" class="form-control" required>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Celular</label>
                            <input type="text" name="celular" class="form-control" required>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Correo</label>
                            <input type="email" name="correo" class="form-control" required>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Área</label>
                            <select name="area" class="form-select" required>
                                <?php foreach ($areasValidas as $a): ?>
                                    <option value="<?= htmlspecialchars($a, ENT_QUOTES, 'UTF-8'); ?>"><?= htmlspecialchars($a, ENT_QUOTES, 'UTF-8'); ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Cargo</label>
                            <input type="text" name="cargo" class="form-control" required>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Fecha de Ingreso</label>
                            <input type="date" name="fecha_ingreso" class="form-control" value="<?= htmlspecialchars($fechaHoy, ENT_QUOTES, 'UTF-8'); ?>" required>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Estado</label>
                            <select name="estado" class="form-select" required>
                                <?php foreach ($estadosValidos as $e): ?>
                                    <option value="<?= htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?>"><?= htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>

                        <div class="mb-3">
                            <label class="form-label">Observaciones</label>
                            <textarea name="observaciones" class="form-control" rows="3"></textarea>
                        </div>

                        <button type="submit" class="btn btn-primary w-100">
                            <i class="fas fa-save me-1"></i> Guardar
                        </button>
                    </form>
                </div>
            </div>
        </div>

        <div class="col-lg-8">
            <div class="card shadow-sm mb-4">
                <div class="card-header bg-light d-flex justify-content-between align-items-center">
                    <h2 class="h5 mb-0">Colaboradores</h2>
                    <span class="badge bg-secondary">Total: <?= count($colaboradores); ?></span>
                </div>
                <div class="card-body">
                    <form method="GET" class="row g-2 align-items-end">
                        <div class="col-sm-4">
                            <label class="form-label">Buscar</label>
                            <input type="text" name="q" class="form-control" placeholder="Nombre, DNI o Cargo" value="<?= htmlspecialchars($search, ENT_QUOTES, 'UTF-8'); ?>">
                        </div>
                        <div class="col-sm-3">
                            <label class="form-label">Área</label>
                            <select name="area" class="form-select">
                                <option value="Todas">Todas</option>
                                <?php foreach ($areasValidas as $a): ?>
                                    <option value="<?= htmlspecialchars($a, ENT_QUOTES, 'UTF-8'); ?>" <?= $filter_area === $a ? 'selected' : ''; ?>><?= htmlspecialchars($a, ENT_QUOTES, 'UTF-8'); ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="col-sm-3">
                            <label class="form-label">Estado</label>
                            <select name="estado" class="form-select">
                                <option value="Todos">Todos</option>
                                <?php foreach ($estadosValidos as $e): ?>
                                    <option value="<?= htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?>" <?= $filter_estado === $e ? 'selected' : ''; ?>><?= htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="col-12 d-flex justify-content-end gap-2">
                            <a class="btn btn-outline-secondary" href="hr_colaboradores.php">Limpiar</a>
                            <button class="btn btn-primary" type="submit">
                                <i class="fas fa-filter me-1"></i> Filtrar
                            </button>
                        </div>
                    </form>
                </div>
            </div>

            <div class="table-responsive">
                <table class="table table-bordered table-striped align-middle">
                    <thead class="table-light">
                        <tr>
                            <th>ID</th>
                            <th>Nombre Completo</th>
                            <th>DNI</th>
                            <th>Celular</th>
                            <th>Correo</th>
                            <th>Área</th>
                            <th>Cargo</th>
                            <th>Fecha Ingreso</th>
                            <th>Estado</th>
                            <th>Observaciones</th>
                            <th>Acciones</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php if (empty($colaboradores)): ?>
                            <tr>
                                <td colspan="11" class="text-center py-4 text-muted">No hay colaboradores para los filtros seleccionados.</td>
                            </tr>
                        <?php else: ?>
                            <?php foreach ($colaboradores as $c): ?>
                                <tr>
                                    <td><?= (int)$c['id']; ?></td>
                                    <td><?= htmlspecialchars($c['nombre_completo'] ?? '', ENT_QUOTES, 'UTF-8'); ?></td>
                                    <td><?= htmlspecialchars($c['dni'] ?? '', ENT_QUOTES, 'UTF-8'); ?></td>
                                    <td><?= htmlspecialchars($c['celular'] ?? '', ENT_QUOTES, 'UTF-8'); ?></td>
                                    <td><?= htmlspecialchars($c['correo'] ?? '', ENT_QUOTES, 'UTF-8'); ?></td>
                                    <td><span class="badge bg-primary"><?= htmlspecialchars($c['area'] ?? '', ENT_QUOTES, 'UTF-8'); ?></span></td>
                                    <td><?= htmlspecialchars($c['cargo'] ?? '', ENT_QUOTES, 'UTF-8'); ?></td>
                                    <td><?= htmlspecialchars($c['fecha_ingreso'] ?? '', ENT_QUOTES, 'UTF-8'); ?></td>
                                    <td><span class="badge bg-info text-dark"><?= htmlspecialchars($c['estado'] ?? '', ENT_QUOTES, 'UTF-8'); ?></span></td>
                                    <td style="max-width: 220px;">
                                        <div style="white-space: pre-wrap;"><?= htmlspecialchars($c['observaciones'] ?? '', ENT_QUOTES, 'UTF-8'); ?></div>
                                    </td>
                                    <td>
                                        <form method="POST" class="d-flex flex-column gap-1">
                                            <input type="hidden" name="action" value="update_colaborador_estado">
                                            <input type="hidden" name="id" value="<?= (int)$c['id']; ?>">
                                            <select name="estado" class="form-select form-select-sm">
                                                <?php foreach ($estadosValidos as $e): ?>
                                                    <option value="<?= htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?>" <?= ($c['estado'] ?? '') === $e ? 'selected' : ''; ?>>
                                                        <?= htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?>
                                                    </option>
                                                <?php endforeach; ?>
                                            </select>
                                            <button type="submit" class="btn btn-sm btn-success">
                                                <i class="fas fa-save me-1"></i> Guardar
                                            </button>
                                        </form>
                                    </td>
                                </tr>
                            <?php endforeach; ?>
                        <?php endif; ?>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>

<?php include 'layout_footer.php'; ?>