/**
 * 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 { DEFAULT_STYLE, EMAIL_LOCALE, OG_SITE_NAME } from "../config.ts";
import { EmailKit, esc, type RenderedEmail } from "./layout.ts";
import { STRINGS } from "./strings.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 t = STRINGS[EMAIL_LOCALE].reset;
  const kit = new EmailKit(
    { style: DEFAULT_STYLE, scheme: "auto" },
    EMAIL_LOCALE,
  );
  const subject = t.subject(OG_SITE_NAME);
  const urlBox = `<div${
    kit.paint(
      { fg: "sec", bg: "soft" },
      `font-family:Menlo,Consolas,'Courier New',monospace;font-size:12px;line-height:1.5;border-radius:${
        Math.min(kit.style.radius.img, 6)
      }px;padding:10px 12px;margin:0 0 22px;word-break:break-all;`,
    )
  }>${esc(resetUrl)}</div>`;
  const body = kit.para(esc(t.hi(username))) +
    kit.para(esc(t.body(OG_SITE_NAME, hours))) +
    kit.button(esc(t.button), resetUrl) +
    kit.note(esc(t.fallback), "margin-bottom:8px;") +
    urlBox +
    kit.note(esc(t.ignore));

  return {
    subject,
    html: kit.document({
      subject,
      preheader: t.preheader(hours),
      title: esc(t.title),
      body,
      footer: kit.footer(esc(t.reason)),
    }),
    text: [
      t.title,
      "",
      t.hi(username),
      "",
      t.body(OG_SITE_NAME, hours),
      "",
      resetUrl,
      "",
      t.ignore,
      "",
      "--",
      t.reason,
    ].join("\n"),
  };
}