/**
 * Renders the email carrying a password reset link. `requestPasswordReset`
 * (`password-reset-service.ts`) sends it, in the instance's style and
 * language: whoever asks isn't signed in, so their own settings don't apply.
 *
 * @module
 */

import { OG_SITE_NAME } from "../config.ts";
import { i18n } from "./i18n.ts";
import {
  EmailKit,
  escMd,
  lookOf,
  mdLink,
  type RenderedEmail,
} from "./layout.ts";

/**
 * Returns the reset email of `username`, whose button opens `resetUrl`. The
 * link stays usable for `hours`, which the email states.
 */
export function renderPasswordResetEmail(
  username: string,
  resetUrl: string,
  hours: number,
): RenderedEmail {
  const markdown = [
    `# ${escMd(i18n._("email.reset.title"))}`,
    escMd(i18n._("email.reset.hi", { username })),
    escMd(i18n._("email.reset.body", { site: OG_SITE_NAME, hours })),
    mdLink(
      i18n._("email.reset.button"),
      resetUrl,
    ),
    `*${escMd(i18n._("email.reset.fallback"))}*`,
    "```\n" + resetUrl + "\n```",
    `*${escMd(i18n._("email.reset.ignore"))}*`,
    "---",
    escMd(i18n._("email.reset.reason")),
  ].join("\n\n");

  return new EmailKit(lookOf()).render({
    subject: i18n._("email.reset.subject", { site: OG_SITE_NAME }),
    preheader: i18n._("email.reset.preheader", { hours }),
    markdown,
  });
}