<?php
/**
 * /ruleta/admin/rasca_premios.php
 * - Vista 1 (sin rasca_id): lista de rasca configurados para elegir
 * - Vista 2 (con rasca_id): CRUD de premios de ese rasca
 */
session_start();
require_once __DIR__ . '/db.php';
if (empty($_SESSION['admin_id'])) { header('Location: ../index.php'); exit; }

//
// Config de uploads
//
$UPLOAD_DIR = __DIR__ . '/../uploads/rasca_premios';
$PUBLIC_DIR = '/ruleta/uploads/rasca_premios'; // ajusta si tu raíz no es /ruleta
if (!is_dir($UPLOAD_DIR)) { @mkdir($UPLOAD_DIR, 0775, true); }

//
// Helpers
//
function sanitize_filename($n){ $n = preg_replace('/[^A-Za-z0-9._-]/','_', $n); return substr($n,0,180); }
function upload_image($field,$UPLOAD_DIR,$PUBLIC_DIR){
  if (!isset($_FILES[$field]) || $_FILES[$field]['error']===UPLOAD_ERR_NO_FILE) return null;
  $f = $_FILES[$field];
  if ($f['error']!==UPLOAD_ERR_OK) throw new RuntimeException("Error subiendo $field (código {$f['error']}).");
  $mime = (new finfo(FILEINFO_MIME_TYPE))->file($f['tmp_name']);
  $allowed = ['image/png'=>'png','image/jpeg'=>'jpg','image/webp'=>'webp'];
  if (!isset($allowed[$mime])) throw new RuntimeException("Formato no permitido. Usa PNG/JPG/WEBP.");
  if ($f['size'] > 5*1024*1024) throw new RuntimeException("Archivo muy grande (máx 5MB).");
  $ext = $allowed[$mime]; $base = sanitize_filename(pathinfo($f['name'], PATHINFO_FILENAME));
  $name = $base.'-'.uniqid().'.'.$ext; $dest = rtrim($UPLOAD_DIR,'/\\').DIRECTORY_SEPARATOR.$name;
  if (!move_uploaded_file($f['tmp_name'],$dest)) throw new RuntimeException("No se pudo guardar el archivo.");
  return rtrim($PUBLIC_DIR,'/').'/'.$name;
}

//
// Routing params
//
$action   = $_GET['action'] ?? '';
$id       = (int)($_GET['id'] ?? 0);
$rasca_id = isset($_GET['rasca_id']) ? (int)$_GET['rasca_id'] : null;

$msg = $err = '';

//
// Form handling (solo si hay rasca_id seleccionado)
//
if ($rasca_id && $_SERVER['REQUEST_METHOD']==='POST') {
  $pid        = (int)($_POST['id'] ?? 0);
  $rasca_id   = (int)($_POST['rasca_id'] ?? 0);
  $nombre     = trim($_POST['nombre'] ?? '');
  $prob       = (float)($_POST['probabilidad'] ?? 0);
  $stock      = ($_POST['stock'] !== '' ? (int)$_POST['stock'] : null);
  $activo     = isset($_POST['activo']) ? 1 : 0;
  $old_img    = $_POST['old_imagen_url'] ?? '';

  if ($rasca_id<=0 || $nombre==='') {
    $err = 'Indica rasca_id y nombre.';
  } else {
    try {
      $img = upload_image('imagen',$UPLOAD_DIR,$PUBLIC_DIR) ?? ($old_img ?: null);
      if ($pid > 0) {
        $st = $conn->prepare("UPDATE rasca_premios SET rasca_id=?, nombre=?, probabilidad=?, stock=?, activo=?, imagen_url=? WHERE id=?");
        // stock puede ser NULL: usa bind con "d" para probabilidad y "i" para stock; si es NULL, usa null y types "isdiisi" sigue válido porque mysqli convierte nulls
        $st->bind_param("isdiisi", $rasca_id, $nombre, $prob, $stock, $activo, $img, $pid);
        $st->execute();
        $msg = 'Premio actualizado.';
      } else {
        $st = $conn->prepare("INSERT INTO rasca_premios (rasca_id, nombre, probabilidad, stock, activo, imagen_url) VALUES (?,?,?,?,?,?)");
        $st->bind_param("isdiis", $rasca_id, $nombre, $prob, $stock, $activo, $img);
        $st->execute();
        $msg = 'Premio creado.';
      }
    } catch (Throwable $e) {
      $err = $e->getMessage();
    }
  }
}

//
// Delete premio
//
if ($rasca_id && $action==='delete' && $id>0) {
  $st = $conn->prepare("DELETE FROM rasca_premios WHERE id=? AND rasca_id=?");
  $st->bind_param("ii", $id, $rasca_id);
  $st->execute();
  $msg = 'Premio eliminado.';
}

//
// Datos para vistas
//
$rasca_list = [];    // para Vista 1
$rasca_info = null;  // info del rasca seleccionado
$edit       = null;  // en Vista 2, premio a editar
$premios    = [];    // lista de premios del rasca

if (!$rasca_id) {
  // Vista 1: listar rasca_config + conteo de premios
  $sql = "SELECT r.rasca_id, r.nombre,
                 COALESCE(p.cnt,0) AS total_premios
          FROM rasca_config r
          LEFT JOIN (
             SELECT rasca_id, COUNT(*) cnt
             FROM rasca_premios
             GROUP BY rasca_id
          ) p ON p.rasca_id = r.rasca_id
          ORDER BY r.rasca_id ASC";
  $rs = $conn->query($sql);
  if ($rs) $rasca_list = $rs->fetch_all(MYSQLI_ASSOC);
} else {
  // Vista 2: CRUD de premios para rasca_id
  $st = $conn->prepare("SELECT rasca_id, nombre FROM rasca_config WHERE rasca_id=?");
  $st->bind_param("i", $rasca_id);
  $st->execute();
  $rasca_info = $st->get_result()->fetch_assoc();

  if ($action==='edit' && $id>0) {
    $st = $conn->prepare("SELECT * FROM rasca_premios WHERE id=? AND rasca_id=?");
    $st->bind_param("ii", $id, $rasca_id);
    $st->execute();
    $edit = $st->get_result()->fetch_assoc();
  }

  $st = $conn->prepare("SELECT * FROM rasca_premios WHERE rasca_id=? ORDER BY id DESC");
  $st->bind_param("i", $rasca_id);
  $st->execute();
  $premios = $st->get_result()->fetch_all(MYSQLI_ASSOC);
}
?>
<!doctype html>
<html lang="es"><head>
<meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1">
<title>Rasca | Premios</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<style>
.thumb{width:70px;height:70px;object-fit:cover;border-radius:.5rem}
.card-hover:hover{box-shadow:0 0.5rem 1rem rgba(0,0,0,.15);}
</style>
</head>
<body>
<nav class="navbar navbar-dark bg-dark">
  <div class="container-fluid">
    <a class="navbar-brand" href="dashboard.php">Admin</a>
    <div class="d-flex gap-2">
      <a class="btn btn-outline-light btn-sm" href="rasca_config.php">Config Rasca</a>
      <a class="btn btn-outline-light btn-sm" href="rasca_premios.php">Premios Rasca</a>
      <a class="btn btn-outline-light btn-sm" href="rasca_jugadas.php">Jugadas Rasca</a>
      <a class="btn btn-outline-light btn-sm" href="../index.php?action=logout">Salir</a>
    </div>
  </div>
</nav>

<div class="container py-4">

  <?php if($msg):?><div class="alert alert-success py-2"><?= htmlspecialchars($msg) ?></div><?php endif; ?>
  <?php if($err):?><div class="alert alert-danger py-2"><?= htmlspecialchars($err) ?></div><?php endif; ?>

  <?php if(!$rasca_id): ?>
    <!-- VISTA 1: Selector de juegos Rasca -->
    <div class="d-flex align-items-center justify-content-between mb-3">
      <h4 class="mb-0">Selecciona un juego de Rasca</h4>
      <a class="btn btn-primary" href="rasca_config.php">Crear/editar Rasca</a>
    </div>

    <?php if(!$rasca_list): ?>
      <div class="alert alert-info">No hay juegos de rasca configurados todavía.</div>
    <?php else: ?>
      <div class="row g-3">
        <?php foreach ($rasca_list as $rc): ?>
          <div class="col-md-4">
            <a href="rasca_premios.php?rasca_id=<?= (int)$rc['rasca_id'] ?>" class="text-decoration-none text-dark">
              <div class="card card-hover h-100">
                <div class="card-body">
                  <div class="d-flex justify-content-between align-items-center">
                    <h5 class="card-title mb-0">Rasca #<?= (int)$rc['rasca_id'] ?></h5>
                    <span class="badge text-bg-secondary"><?= (int)$rc['total_premios'] ?> premios</span>
                  </div>
                  <p class="mt-2 mb-0 text-muted"><?= htmlspecialchars($rc['nombre'] ?? '') ?></p>
                </div>
                <div class="card-footer bg-transparent border-0 pt-0">
                  <button class="btn btn-sm btn-outline-primary">Administrar premios</button>
                </div>
              </div>
            </a>
          </div>
        <?php endforeach; ?>
      </div>
    <?php endif; ?>

  <?php else: ?>
    <!-- VISTA 2: CRUD premios de un Rasca -->
    <div class="d-flex align-items-center justify-content-between mb-3">
      <div>
        <a href="rasca_premios.php" class="btn btn-link">&larr; Volver</a>
        <h4 class="d-inline-block ms-2 mb-0">Premios Rasca #<?= (int)$rasca_id ?> <?= $rasca_info ? '— '.htmlspecialchars($rasca_info['nombre']) : '' ?></h4>
      </div>
    </div>

    <div class="card shadow-sm mb-4">
      <div class="card-body">
        <h5 class="mb-3"><?= $edit ? 'Editar premio' : 'Nuevo premio' ?></h5>
        <form method="post" enctype="multipart/form-data" class="row g-3">
          <input type="hidden" name="id" value="<?= (int)($edit['id'] ?? 0) ?>">
          <input type="hidden" name="old_imagen_url" value="<?= htmlspecialchars($edit['imagen_url'] ?? '') ?>">
          <div class="col-md-2">
            <label class="form-label">Rasca ID</label>
            <input type="number" name="rasca_id" class="form-control" required value="<?= htmlspecialchars($rasca_id) ?>">
          </div>
          <div class="col-md-4">
            <label class="form-label">Nombre</label>
            <input name="nombre" class="form-control" required value="<?= htmlspecialchars($edit['nombre'] ?? '') ?>">
          </div>
          <div class="col-md-3">
            <label class="form-label">Probabilidad (peso)</label>
            <input type="number" step="0.001" name="probabilidad" class="form-control" required value="<?= htmlspecialchars($edit['probabilidad'] ?? '0') ?>">
          </div>
          <div class="col-md-3">
            <label class="form-label">Stock (vacío = ilimitado)</label>
            <input type="number" name="stock" class="form-control" value="<?= htmlspecialchars(isset($edit['stock']) ? $edit['stock'] : '') ?>">
          </div>

          <div class="col-md-6">
            <label class="form-label">Imagen del premio</label>
            <input type="file" name="imagen" class="form-control" accept=".png,.jpg,.jpeg,.webp">
            <?php if(!empty($edit['imagen_url'])): ?>
              <div class="mt-2"><img src="<?= htmlspecialchars($edit['imagen_url']) ?>" class="thumb"></div>
            <?php endif; ?>
          </div>
          <div class="col-md-2 d-flex align-items-end">
            <div class="form-check">
              <input class="form-check-input" type="checkbox" name="activo" id="activo" <?= (isset($edit['activo']) ? ((int)$edit['activo']===1) : true) ? 'checked' : '' ?>>
              <label class="form-check-label" for="activo">Activo</label>
            </div>
          </div>

          <div class="col-12">
            <button class="btn btn-primary"><?= $edit ? 'Actualizar' : 'Crear' ?></button>
            <?php if($edit): ?><a href="rasca_premios.php?rasca_id=<?= (int)$rasca_id ?>" class="btn btn-secondary">Cancelar</a><?php endif; ?>
          </div>
        </form>
      </div>
    </div>

    <div class="card shadow-sm">
      <div class="card-body table-responsive">
        <table class="table table-striped table-sm align-middle">
          <thead>
            <tr>
              <th>ID</th>
              <th>Nombre</th>
              <th>Prob</th>
              <th>Stock</th>
              <th>Activo</th>
              <th>Imagen</th>
              <th class="text-nowrap">Acciones</th>
            </tr>
          </thead>
          <tbody>
            <?php foreach($premios as $r): ?>
              <tr>
                <td><?= (int)$r['id'] ?></td>
                <td><?= htmlspecialchars($r['nombre']) ?></td>
                <td><?= htmlspecialchars($r['probabilidad']) ?></td>
                <td><?= is_null($r['stock']) ? '∞' : (int)$r['stock'] ?></td>
                <td><?= ((int)$r['activo']===1 ? 'Sí' : 'No') ?></td>
                <td><?= $r['imagen_url'] ? '<img class="thumb" src="'.htmlspecialchars($r['imagen_url']).'">' : '—' ?></td>
                <td class="text-nowrap">
                  <a class="btn btn-sm btn-outline-primary" href="rasca_premios.php?rasca_id=<?= (int)$rasca_id ?>&action=edit&id=<?= (int)$r['id'] ?>">Editar</a>
                  <a class="btn btn-sm btn-outline-danger" href="rasca_premios.php?rasca_id=<?= (int)$rasca_id ?>&action=delete&id=<?= (int)$r['id'] ?>" onclick="return confirm('¿Eliminar premio?')">Eliminar</a>
                </td>
              </tr>
            <?php endforeach; ?>
            <?php if(!$premios): ?>
              <tr><td colspan="7" class="text-center text-muted">Sin premios</td></tr>
            <?php endif; ?>
          </tbody>
        </table>
      </div>
    </div>

  <?php endif; ?>
</div>
</body>
</html>