<?php
require_once __DIR__ . '/../../app/lib/auth.php';
require_once __DIR__ . '/../../app/lib/merchant_pattern_service.php';

check_auth();

header('Content-Type: application/json; charset=UTF-8');
header('Cache-Control: no-store');

$merchant = trim((string)($_GET['merchant_name'] ?? ''));
$transactionType = trim((string)($_GET['transaction_type'] ?? ''));

$allowedTypes = ['income', 'expense', 'transfer'];

if ($merchant === '' || $transactionType === '' || !in_array($transactionType, $allowedTypes, true)) {
    echo json_encode([
        'ok' => true,
        'found' => false,
    ], JSON_UNESCAPED_UNICODE);
    exit;
}

if (mb_strlen($merchant, 'UTF-8') < 2) {
    echo json_encode([
        'ok' => true,
        'found' => false,
    ], JSON_UNESCAPED_UNICODE);
    exit;
}

try {
    $suggested = suggest_category_from_merchant(user_id(), $merchant, $transactionType);

    if (!$suggested) {
        echo json_encode([
            'ok' => true,
            'found' => false,
        ], JSON_UNESCAPED_UNICODE);
        exit;
    }

    echo json_encode([
        'ok' => true,
        'found' => true,
        'category_id' => (int)$suggested['category_id'],
        'category_name' => (string)$suggested['category_name'],
        'category_type' => (string)$suggested['category_type'],
        'pattern_text' => (string)($suggested['pattern_text'] ?? ''),
        'keyword' => (string)($suggested['keyword'] ?? $suggested['pattern_text'] ?? ''),
        'match_type' => (string)($suggested['match_type'] ?? ''),
        'priority' => (int)($suggested['priority'] ?? 0),
        'confidence' => (float)($suggested['confidence'] ?? 0),
    ], JSON_UNESCAPED_UNICODE);
} catch (Throwable $e) {
    http_response_code(500);
    echo json_encode([
        'ok' => false,
        'found' => false,
        'message' => '자동추천 조회 실패',
    ], JSON_UNESCAPED_UNICODE);
}