<?php
/**
 * 영상 시청 시간 조회 API
 * POST /bbs/api/get_video_time.php
 *
 * Parameters:
 * - content_id (필수): 영상 content ID (string)
 *
 * Returns:
 * - watch_tm   : edu_learning_histories.watch_tm  (이어보기 기준 시간, 초)
 * - content_tm : edu_learning_histories.content_tm (영상 전체 길이, 초)
 */

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

header('Content-Type: application/json; charset=utf-8');

$member_id    = trim((string)($_SESSION['member_id']    ?? ''));
$sys_comp_code = trim((string)($_SESSION['sys_comp_code'] ?? ''));

if ($member_id === '') {
    http_response_code(401);
    echo json_encode(['success' => false, 'error' => 'Unauthorized']);
    exit;
}

if ($sys_comp_code === '') {
    http_response_code(401);
    echo json_encode(['success' => false, 'error' => 'sys_comp_code_missing']);
    exit;
}

// content_id: JSON body 또는 POST 폼 데이터 모두 허용
$rawBody   = file_get_contents('php://input');
$jsonBody  = (is_string($rawBody) && $rawBody !== '') ? json_decode($rawBody, true) : null;
$content_id = trim((string)(
    (is_array($jsonBody) ? ($jsonBody['content_id'] ?? '') : '') ?:
    ($_POST['content_id'] ?? '') ?:
    ($_GET['content_id']  ?? '')
));

if ($content_id === '') {
    http_response_code(400);
    echo json_encode(['success' => false, 'error' => 'Invalid content_id']);
    exit;
}

try {
    require_once __DIR__ . '/../db_conn.php';
    $pdo = db_conn();

    // edu_learning_histories 에서 watch_tm / content_tm 조회
    $stmt = $pdo->prepare(
        "SELECT watch_tm, content_tm
         FROM edu_learning_histories
         WHERE member_id    = ?
           AND sys_comp_code = ?
           AND content_id   = ?
         LIMIT 1"
    );
    $stmt->execute([$member_id, $sys_comp_code, $content_id]);
    $row = $stmt->fetch(PDO::FETCH_ASSOC);

    $watch_tm   = (int)($row['watch_tm']   ?? 0);
    $content_tm = (int)($row['content_tm'] ?? 0);

    echo json_encode([
        'success'    => true,
        'content_id' => $content_id,
        'watch_tm'   => $watch_tm,
        'content_tm' => $content_tm,
    ], JSON_UNESCAPED_UNICODE);

} catch (Throwable $e) {
    error_log('[get_video_time.php] Error: ' . $e->getMessage());
    http_response_code(500);
    echo json_encode(['success' => false, 'error' => 'server_error']);
}
?>