import type { WorkshopFormValues } from "./workshopSignup";

export interface WorkshopInquiryMailInput {
  values: WorkshopFormValues;
  routeNote: string;
  largeOrganization: boolean;
  requestId: string;
  schedulingUrl: string;
}

function line(label: string, value: string): string {
  const trimmed = value.trim();
  return trimmed.length > 0 ? `${label}: ${trimmed}` : `${label}:`;
}

/** Inbox note for the team. Includes the answers and a route. No price. */
export function buildWorkshopInboxMail(input: WorkshopInquiryMailInput): {
  subject: string;
  text: string;
  html: string;
} {
  const { values } = input;
  const challenges = values.challenges.join(", ");
  const text = [
    `Request ID: ${input.requestId}`,
    line("Organization", values.organizationName),
    line("Kind", values.organizationKind),
    line("Members", values.memberCount),
    `Large organization: ${input.largeOrganization ? "yes" : "no"}`,
    line("Route", input.routeNote),
    line("Name", values.contactName),
    line("Email", values.email),
    line("Role", values.role),
    line("Challenges", challenges),
    line("Something else", values.challengeOther),
    line("Unspoken question", values.unspokenQuestion),
    line("Page", values.sourcePage),
    line("Link", values.sourceUrl),
  ].join("\n");

  const html = text
    .split("\n")
    .map((row) => `<p>${escapeHtml(row)}</p>`)
    .join("");

  return {
    subject: `Workshop inquiry from ${values.organizationName}`,
    text,
    html,
  };
}

/** Confirmation to the person who wrote. Promises two working days and names no price. */
export function buildWorkshopConfirmationMail(input: {
  largeOrganization: boolean;
  schedulingUrl: string;
}): { subject: string; text: string; html: string } {
  const subject = "We received your workshop note";
  const intro =
    "Thank you. A facilitator will read this closely and write back within two working days.";
  const next = input.largeOrganization
    ? "Organizations of this size start with a call."
    : "The kit has the four questions and the thirteen templates if you want a head start.";
  const schedule =
    input.largeOrganization && input.schedulingUrl.trim().length > 0
      ? `Choose a time: ${input.schedulingUrl.trim()}`
      : "";
  const text = [intro, next, schedule].filter((part) => part.length > 0).join("\n\n");
  const html =
    `<div style="background:#141414;padding:24px 32px;">` +
    `<p style="margin:0;font-family:Inter,Arial,sans-serif;font-size:14px;letter-spacing:0.08em;color:#ffffff;">COMMUNITYRULE</p>` +
    `</div>` +
    `<div style="background:#ffffff;padding:32px;font-family:Inter,Arial,sans-serif;color:#141414;">` +
    `<p>${escapeHtml(intro)}</p>` +
    `<p>${escapeHtml(next)}</p>` +
    (schedule
      ? `<p><a href="${escapeHtml(input.schedulingUrl.trim())}">Choose a time</a></p>`
      : "") +
    `</div>`;

  return { subject, text, html };
}

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