add_action('wpcf7_before_send_mail', 'custom_handle_cf7_submission');

function custom_handle_cf7_submission($contact_form) {
    $submission = WPCF7_Submission::get_instance();
    if (!$submission) return;

    $posted_data = $submission->get_posted_data();

    // CSVファイルのパス（wp-content以下に保存）
    $upload_dir = wp_upload_dir();
    $csv_file = $upload_dir['basedir'] . '/cf7-submissions.csv';

    // ヘッダーがなければ書き込む（初回のみ）
    if (!file_exists($csv_file)) {
        $headers = array_keys($posted_data);
        file_put_contents($csv_file, implode(",", $headers) . "\n", FILE_APPEND);
    }

    // データを追記
    $values = array_map(function ($value) {
        return '"' . str_replace('"', '""', $value) . '"';  // CSVエスケープ
    }, $posted_data);
    file_put_contents($csv_file, implode(",", $values) . "\n", FILE_APPEND);

    // 「異常あり」のときだけメール送信
    if (isset($posted_data['radio-situation']) && $posted_data['radio-situation'] === '異常あり') {
        $contact_form->skip_mail = false;  // メール送信を有効化
    }
}
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