<?php
    require '../../../session.php';
    require '../../../config.php';
    require '../../../dbconn.php';
    require '../../../assets/utils/db_helpers.php';

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

    $answer = ['success' => 0, 'message' => ''];

    // ─── Must come from onboarding session ───────────────────────
    if (empty($_SESSION['onboarding_user_id'])) {
        $answer['message'] = 'Invalid session. Please verify your email first.';
        http_response_code(403);
        exit(json_encode($answer));
    }

    $user_id = (int)$_SESSION['onboarding_user_id'];

    // ─── CSRF ─────────────────────────────────────────────────────
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        $csrf = $_SERVER['HTTP_X_CSRF_TOKEN'] ?? '';
        if (empty($csrf) || $csrf !== ($_SESSION['csrf_token'] ?? '')) {
            http_response_code(403);
            exit(json_encode(['message' => 'Invalid request.']));
        }
    }

    $data = json_decode($_POST['json'] ?? '{}', true) ?: [];

    try {

        $company_name  = trim($data['company_name']  ?? '');
        $company_name2 = trim($data['company_name2'] ?? '');
        $channel_name  = strtolower(preg_replace('/[^a-z0-9\-_]/', '', $data['channel_name'] ?? ''));
        $branch        = trim($data['branch']        ?? 'สำนักงานใหญ่');
        $branch_no     = trim($data['branch_no']     ?? '00000');
        $email         = trim($data['email']         ?? '');
        $phone         = trim($data['phone']         ?? '');

        if (!$company_name || !$channel_name) {
            $answer['message'] = 'Company name and channel name are required.';
            http_response_code(422);
            exit(json_encode($answer));
        }

        // ── SMTP fields required ──────────────────────────────────
        $smtp_host     = trim($data['smtp_host']     ?? '');
        $smtp_username = trim($data['smtp_username'] ?? '');
        $smtp_password =      $data['smtp_password'] ?? '';

        if (!$smtp_host || !$smtp_username || !$smtp_password) {
            $answer['message'] = 'SMTP configuration is required. Please fill in all SMTP fields.';
            http_response_code(422);
            exit(json_encode($answer));
        }

        $smtp_port       = trim($data['smtp_port']       ?? '587');
        
        
        $smtp_encryption = trim($data['smtp_encryption'] ?? 'tls');

        if (!in_array($smtp_port, ['25', '465', '587'], true)) $smtp_port = '587';
        if (!in_array($smtp_encryption, ['tls', 'ssl', 'none'], true)) $smtp_encryption = 'tls';

        // ── Silent SMTP test — before touching the DB ─────────────
        // Build a temporary config using the encrypted password
        $encrypted_pass = openssl_encrypt($smtp_password, $method, $pinkey, 0, $iv);

        $smtp_config = [
            'server'     => $smtp_host,
            'port'       => $smtp_port,
            'username'   => $smtp_username,
            'password'   => $encrypted_pass,
            'from_name'  => $company_name ?: $smtp_username,
            'from_email' => $email ?: $smtp_username,
            'encryption' => $smtp_encryption,
        ];

        require_once $include_url . 'assets/utils/module/mailer.php';

        $mailer = new mailer(['pdo1' => $pdo1]);
        $mailer->send_email([
            'company_id'   => 0,
            'smtp'         => $smtp_config,
            'to'           => $_SESSION['onboarding_email'] ?? $smtp_username,
            'subject'      => 'WMS — SMTP Verification',
            'message'      => "Your SMTP is working correctly.\n\nSetup is now complete.",
            'channel_name' => $company_name ?: 'WMS',
            'key'          => $pinkey,
        ]);
        // if mailer fails it exits with its own error JSON — nothing below runs

        // ── Duplicate channel name ────────────────────────────────
        $sth = $pdo1->prepare('SELECT company_id FROM company_list WHERE channel_name = :c LIMIT 1');
        $sth->execute([':c' => $channel_name]);
        db_check($sth, $answer);
        if ($sth->fetchColumn()) {
            $answer['message'] = 'Channel name is already taken. Please choose another.';
            http_response_code(409);
            exit(json_encode($answer));
        }

        // ── Insert company ────────────────────────────────────────
        $sth = $pdo1->prepare("
            INSERT INTO company_list
                (channel_name, company_name, company_name2, branch, branch_no, email, phone, fx)
            VALUES
                (:channel_name, :company_name, :company_name2, :branch, :branch_no, :email, :phone, 'thb')
        ");
        $sth->execute([
            ':channel_name'  => $channel_name,
            ':company_name'  => $company_name,
            ':company_name2' => $company_name2,
            ':branch'        => $branch,
            ':branch_no'     => $branch_no,
            ':email'         => $email,
            ':phone'         => $phone,
        ]);
        db_check($sth, $answer);
        $company_id = (int)$pdo1->lastInsertId();

        // ── Map user as owner ─────────────────────────────────────
        $sth = $pdo1->prepare("
            INSERT INTO company_map_user (company_id, user_id, role, created_at)
            VALUES (:company_id, :user_id, 'owner', NOW())
        ");
        $sth->execute([':company_id' => $company_id, ':user_id' => $user_id]);
        db_check($sth, $answer);

        // ── Set as default company for this user ──────────────────
        $sth = $pdo1->prepare("UPDATE user SET default_company = :c, `status` = 'active' WHERE user_id = :u");
        $sth->execute([':c' => $company_id, ':u' => $user_id]);
        db_check($sth, $answer);

        // ── Save SMTP ─────────────────────────────────────────────
        $sth = $pdo1->prepare("
            INSERT INTO company_smtp
                (company_id, server, port, username, password,
                 from_name, from_email, encryption, updated_at)
            VALUES
                (:company_id, :server, :port, :username, :password,
                 :from_name, :from_email, :encryption, NOW())
        ");
        $sth->execute([
            ':company_id' => $company_id,
            ':server'     => $smtp_host,
            ':port'       => $smtp_port,
            ':username'   => $smtp_username,
            ':password'   => $encrypted_pass,
            ':from_name'  => $company_name,
            ':from_email' => $email ?: $smtp_username,
            ':encryption' => $smtp_encryption,
        ]);
        db_check($sth, $answer);

        // ── Clear onboarding session ──────────────────────────────
        unset(
            $_SESSION['onboarding_user_id'],
            $_SESSION['onboarding_name'],
            $_SESSION['onboarding_email']
        );

        $answer['success'] = 1;
        $answer['message'] = 'Setup complete.';

    } catch (Exception $e) {
        error_log('[onboarding] ' . $e->getMessage());
        $answer['message'] = 'Setup failed. Please try again.';
        http_response_code(500);
    }

    exit(json_encode($answer));
?>