import { brandingPrimaryColor, renderShell, type BrandingShell } from '@/lib/email/shell';

export interface InquiryClientConfirmationData {
  firstName: string;
  mooringNumber: string | null;
  contactEmail: string;
  /** Display name; falls back to "Port Nimara". */
  portName?: string;
}

interface RenderOpts {
  branding?: BrandingShell | null;
}

export function inquiryClientConfirmation(
  data: InquiryClientConfirmationData,
  overrides?: RenderOpts,
) {
  const { firstName, mooringNumber, contactEmail } = data;
  const portName = data.portName ?? 'Port Nimara';

  const berthText = mooringNumber ? `Berth ${mooringNumber}` : `a ${portName} Berth`;
  const subject = mooringNumber
    ? `Thank You for Your Interest in Berth ${mooringNumber}`
    : `Thank You for Your Interest in a ${portName} Berth`;

  const accent = brandingPrimaryColor(overrides?.branding);

  const body = `
              <p style="margin-bottom:10px; font-size:16px;">Dear ${escapeHtml(firstName)},</p>
              <p style="margin-bottom:10px; font-size:16px;">
                Thank you for expressing interest in ${escapeHtml(berthText)}.
                Our team has registered your interest, and we will reach out to you very shortly
                by your preferred method of contact with more information.
              </p>
              <p style="margin-bottom:10px; font-size:16px;">
                If you have any questions, please feel free to reach out to us at
                <a href="mailto:${escapeHtml(contactEmail)}" style="color:${accent}; text-decoration:underline;">${escapeHtml(contactEmail)}</a>.
              </p>
              <p style="font-size:16px;">
                Best regards,<br />
                The ${escapeHtml(portName)} Sales Team
              </p>`;

  const text = [
    `Dear ${firstName},`,
    '',
    `Thank you for expressing interest in ${berthText}. Our team has registered your interest, and we will reach out to you very shortly by your preferred method of contact with more information.`,
    '',
    `If you have any questions, please feel free to reach out to us at ${contactEmail}.`,
    '',
    'Best regards,',
    `The ${portName} Sales Team`,
  ].join('\n');

  return {
    subject,
    html: renderShell({ title: subject, body, branding: overrides?.branding }),
    text,
  };
}

function escapeHtml(str: string): string {
  return str
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}