<?php
// /egbim/bbs/descope_qa_comment.php
date_default_timezone_set('Asia/Seoul');
header('Content-Type: application/json; charset=utf-8');
ini_set('display_errors', 1);
error_reporting(E_ALL);

function out($arr, $code=200){
    http_response_code($code);
    echo json_encode($arr, JSON_UNESCAPED_UNICODE);
    exit;
}

/* ✅ 세션 복원 */
require_once __DIR__ . '/../skin/member/basic/descope_session.php';
if (session_status() !== PHP_SESSION_ACTIVE) session_start();

/* ✅ 로그인 정보 */
$loginId  = $_SESSION['user']['loginIds'][0] ?? '';
$userName = $_SESSION['user']['name'] ?? ($_SESSION['user']['userName'] ?? '');

/* ✅ 관리자 가드 */
@include_once $_SERVER['DOCUMENT_ROOT'].'/egbim/bbs/admin_guard.php';
$isAdmin = function_exists('is_qna_admin') ? is_qna_admin($loginId) : false;
if ($isAdmin && function_exists('get_admin_display_name')) {
    $userName = get_admin_display_name($loginId, $userName);
}

/* ✅ 입력 데이터 */
$data = $_POST;
$postId  = isset($data['postId'])  ? (int)$data['postId'] : 0;
$comment = isset($data['comment']) ? trim($data['comment']) : '';

if ($postId < 1 || ($comment === '' && empty($_FILES['images']['name'][0]))) {
    out(['status'=>'fail','message'=>'댓글 또는 이미지가 필요합니다.'], 400);
}
if (mb_strlen($comment,'UTF-8') > 2000) {
    out(['status'=>'fail','message'=>'댓글은 2,000자 이내로 입력하세요.'], 400);
}

/* ✅ DB 연결 */
try{
    $pdo = new PDO(
        "mysql:host=db;dbname=egbim;charset=utf8mb4",
        'egbim','baron3840!!',
        [
            PDO::ATTR_ERRMODE=>PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE=>PDO::FETCH_ASSOC,
        ]
    );
    $pdo->exec("SET time_zone = '+09:00'");
}catch(Exception $e){
    out(['status'=>'fail','message'=>'DB 연결 실패: '.$e->getMessage()],500);
}

/* ✅ 글 존재 확인 */
$st = $pdo->prepare("SELECT post_id, login_id AS author_id, is_secret FROM qa_posts WHERE post_id=?");
$st->execute([$postId]);
$post = $st->fetch();
if (!$post) out(['status'=>'fail','message'=>'존재하지 않는 글입니다.'],404);

if (!$isAdmin && (int)$post['is_secret'] === 1 && $post['author_id'] !== $loginId) {
    out(['status'=>'fail','message'=>'비밀글에는 작성자 본인과 관리자만 댓글을 작성할 수 있습니다.'],403);
}

/* ✅ 로그인 이름 폴백 */
if ($loginId === '')  $loginId = 'guest';
if ($userName === '') $userName = $loginId;

/* ✅ 댓글 INSERT */
try {
    $ins = $pdo->prepare("
        INSERT INTO qa_comments (post_id, commenter, user_name, content, created_at)
        VALUES (:pid, :login_id, :user_name, :content, NOW())
    ");
    $ins->execute([
        ':pid'       => $postId,
        ':login_id'  => $loginId,
        ':user_name' => $userName,
        ':content'   => $comment,
    ]);
    $cid = (int)$pdo->lastInsertId();
} catch (Exception $e) {
    out(['status'=>'fail','message'=>'댓글 저장 실패: '.$e->getMessage()],500);
}

/* ================================
    댓글 이미지 업로드 + 썸네일 생성
================================ */

$uploadedPaths = [];
$thumbPaths = [];

$uploadDir = $_SERVER['DOCUMENT_ROOT'].'/egbim/uploads/comment/';
$thumbDir  = $uploadDir.'thumb/';

$uploadUrl = '/uploads/comment/';
$thumbUrl  = '/uploads/comment/thumb/';

if (!is_dir($uploadDir)) mkdir($uploadDir, 0777, true);
if (!is_dir($thumbDir))  mkdir($thumbDir, 0777, true);

// 🔧 썸네일 생성 함수
function create_thumbnail($src, $dest, $target_width = 180) {
    $info = getimagesize($src);
    if (!$info) return false;

    switch ($info[2]) {
        case IMAGETYPE_JPEG: $img = imagecreatefromjpeg($src); break;
        case IMAGETYPE_PNG:  $img = imagecreatefrompng($src); break;
        case IMAGETYPE_GIF:  $img = imagecreatefromgif($src); break;
        case IMAGETYPE_WEBP: $img = imagecreatefromwebp($src); break;
        default: return false;
    }

    $width  = $info[0];
    $height = $info[1];
    $target_height = intval($height * ($target_width / $width));

    $thumb = imagecreatetruecolor($target_width, $target_height);
    imagecopyresampled($thumb, $img, 0, 0, 0, 0,
        $target_width, $target_height,
        $width, $height
    );

    imagejpeg($thumb, $dest, 90);
    return true;
}


$imageList = [];

// 🔧 이미지 저장
if (!empty($_FILES['images']['name'][0])) {
    foreach ($_FILES['images']['tmp_name'] as $i => $tmpName) {
        if (!is_uploaded_file($tmpName)) continue;

        $ext = strtolower(pathinfo($_FILES['images']['name'][$i], PATHINFO_EXTENSION));
        if (!in_array($ext, ['jpg','jpeg','png','gif','webp'])) continue;

        $newName  = time().'_'.bin2hex(random_bytes(3)).'.'.$ext;
        $dest     = $uploadDir.$newName;

        $thumbName = 'thumb_'.$newName;
        $thumbDest = $thumbDir.$thumbName;

        // 원본 저장
        if (move_uploaded_file($tmpName, $dest)) {
            chmod($dest, 0644);

            // 🔥 썸네일 생성
            create_thumbnail($dest, $thumbDest, 180);

            $uploadedPaths[] = $uploadUrl.$newName;
            $thumbPaths[]    = $thumbUrl.$thumbName;
        }
    }

    /* 🔧 DB 저장 */
    $imgStmt = $pdo->prepare("
        INSERT INTO qa_comment_images (comment_id, file_name, file_path, thumb_path)
        VALUES (:cid, :name, :path, :thumb)
    ");


    foreach ($uploadedPaths as $i => $url) {

        $imgStmt->execute([
            ':cid'  => $cid,
            ':name' => $_FILES['images']['name'][$i],
            ':path' => $url,
            ':thumb'=> $thumbPaths[$i]
        ]);

        /* 응답용 데이터 */
        $imageList[] = [
            'full'  => $url,
            'thumb' => $thumbPaths[$i],
            'name'  => $_FILES['images']['name'][$i]
        ];
    }

}

/* ✅ 성공 응답 */
out([
    'status'       => 'ok',
    'comment_id'   => $cid,
    'login_id'     => $loginId,
    'user_name'    => $userName,
    'comment_text' => $comment,
    'created_at'   => (new DateTime('now', new DateTimeZone('Asia/Seoul')))->format('Y-m-d H:i:s'),
    // 'images'       => $uploadedPaths,
    'images'       => $imageList
]);