<?php
/**
 * 키워드 맵핑 확인 API
 * KW10004, KW10005가 무엇으로 맵핑되는지 확인
 */
header('Content-Type: application/json; charset=utf-8');

require_once dirname(__DIR__) . '/db_conn.php';

try {
    $pdo = db_conn();
    $pdo->exec("SET NAMES 'utf8mb4'");

    $result = [
        'kw_codes' => ['KW10004', 'KW10005'],
        'mapping' => [],
        'all_kw100_sample' => [],
        'recommend_kw_raw' => [],
    ];

    // 1. KW10004, KW10005의 한글명 확인
    $stmt = $pdo->prepare("SELECT base_code, code_name FROM edu_codes WHERE base_code IN ('KW10004', 'KW10005')");
    $stmt->execute();
    foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $row) {
        $result['mapping'][$row['base_code']] = $row['code_name'];
    }

    // 2. KW100 그룹의 모든 키워드 샘플
    $stmt2 = $pdo->query("SELECT base_code, code_name FROM edu_codes WHERE group_code = 'KW100' LIMIT 10");
    $result['all_kw100_sample'] = $stmt2->fetchAll(PDO::FETCH_ASSOC);

    // 3. edu_recommend_keywords 원본 데이터
    $stmt3 = $pdo->query("SELECT * FROM edu_recommend_keywords");
    $result['recommend_kw_raw'] = $stmt3->fetchAll(PDO::FETCH_ASSOC);

    // 4. 최종 조인 결과 (main_data.php와 동일한 쿼리)
    $stmt4 = $pdo->prepare("
        SELECT rk.keyword_code, ec.code_name AS keyword_name, rk.is_active, rk.sys_comp_code
        FROM   edu_recommend_keywords rk
        JOIN   edu_codes ec ON ec.base_code = rk.keyword_code
        WHERE  rk.is_active = 1
    ");
    $stmt4->execute();
    $result['admin_keywords_final'] = $stmt4->fetchAll(PDO::FETCH_ASSOC);

    echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);

} catch (Exception $e) {
    echo json_encode(['error' => $e->getMessage()], JSON_UNESCAPED_UNICODE);
}