import type { BoardCard } from "./store";

const escapeHtml = (value: unknown) =>
  String(value ?? "")
    .replaceAll("&", "&")
    .replaceAll("<", "&lt;")
    .replaceAll(">", "&gt;")
    .replaceAll('"', "&quot;");

export function renderLogin(message = "") {
  return pageShell(
    "Login",
    `
      <main class="loginShell">
        <section class="loginPanel">
          <p class="stamp">Private board</p>
          <h1>Admin</h1>
          ${message ? `<p class="notice">${escapeHtml(message)}</p>` : ""}
          <form method="post" action="/admin/login" class="loginForm">
            <label>
              <span>Password</span>
              <input name="password" type="password" autocomplete="current-password" autofocus />
            </label>
            <button type="submit">Login</button>
          </form>
        </section>
      </main>
    `
  );
}

export function renderAdmin(cards: BoardCard[], options: { storageMode: string; message?: string }) {
  const sorted = [...cards].sort((a, b) => Date.parse(b.updatedAt) - Date.parse(a.updatedAt));

  return pageShell(
    "Admin",
    `
      <main class="adminShell">
        <header class="mast">
          <div>
            <p class="stamp">Elysia admin</p>
            <h1>Доска<br />позора</h1>
          </div>
          <aside class="statusRail">
            <span>${sorted.length} filed</span>
            <strong>${escapeHtml(options.storageMode)}</strong>
            <a class="smallButton linkButton" href="${escapeHtml(process.env.PUBLIC_SITE_URL || "http://localhost:4321")}">Home</a>
            <a class="smallButton linkButton" href="/docs">API Docs</a>
            <form method="post" action="/admin/logout">
              <button type="submit" class="smallButton">Logout</button>
            </form>
          </aside>
        </header>

        ${
          options.message
            ? `<section class="noticeBanner">${escapeHtml(options.message)}</section>`
            : ""
        }

        <section class="workbench">
          <form class="editor" method="post" action="/admin/cards" enctype="multipart/form-data">
            <p class="stamp">New card</p>
            <label>
              <span>Title</span>
              <input name="title" required />
            </label>
            <label>
              <span>Comment</span>
              <textarea name="comment" rows="4"></textarea>
            </label>
            <label>
              <span>Image URL</span>
              <input name="imageUrl" inputmode="url" />
            </label>
            <label>
              <span>Upload image</span>
              <input name="image" type="file" accept="image/*" />
            </label>
            <label class="checkline">
              <input name="published" type="checkbox" checked />
              <span>Published</span>
            </label>
            <button type="submit">Create</button>
          </form>

          <section class="cards" aria-label="Cards">
            ${
              sorted.length === 0
                ? `<div class="empty">No cards yet.</div>`
                : sorted.map(renderCardEditor).join("")
            }
          </section>
        </section>
      </main>
      <script>
        document.querySelectorAll("form").forEach(f => {
          f.addEventListener("submit", () => {
            f.querySelectorAll("button[type=submit]").forEach(b => {
              b.disabled = true;
              b.textContent = "Wait...";
            });
          });
        });
      </script>
    `
  );
}

function renderCardEditor(card: BoardCard) {
  return `
    <article class="cardEditor">
      ${card.imageUrl ? `<img src="${escapeHtml(card.imageUrl)}" alt="${escapeHtml(card.title)}" />` : `<div class="imageEmpty">No image</div>`}
      <form method="post" action="/admin/cards" enctype="multipart/form-data">
        <input type="hidden" name="id" value="${escapeHtml(card.id)}" />
        <label>
          <span>Title</span>
          <input name="title" required value="${escapeHtml(card.title)}" />
        </label>
        <label>
          <span>Comment</span>
          <textarea name="comment" rows="3">${escapeHtml(card.comment)}</textarea>
        </label>
        <label>
          <span>Image URL</span>
          <input name="imageUrl" value="${escapeHtml(card.imageUrl)}" />
        </label>
        <label>
          <span>Replace image</span>
          <input name="image" type="file" accept="image/*" />
        </label>
        <label class="checkline">
          <input name="published" type="checkbox" ${card.published ? "checked" : ""} />
          <span>Published</span>
        </label>
        <div class="rowActions">
          <button type="submit">Save</button>
          <button type="submit" formaction="/admin/cards/delete" class="danger">Delete</button>
        </div>
      </form>
    </article>
  `;
}

function pageShell(title: string, body: string) {
  return `<!doctype html>
    <html lang="ru">
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <meta name="theme-color" content="#000000" />
        <title>${escapeHtml(title)} · Pozor Admin</title>
        <style>${adminCss}</style>
      </head>
      <body>${body}</body>
    </html>`;
}

const adminCss = `
/* Hallmark · pre-emit critique: P5 H4 E4 S5 R5 V4 */
:root {
  --color-black: #000000;
  --color-ink: #f7f7f7;
  --color-panel: #111111;
  --color-panel-raised: #181818;
  --color-muted: #a7a7a7;
  --color-line: #f7f7f7;
  --color-line-soft: #565656;
  --color-danger: #ffffff;
  --shadow-hard: 8px 8px 0 var(--color-line);
  --font-display: Georgia, "Times New Roman", serif;
  --font-body: Georgia, "Times New Roman", serif;
  --font-mono: "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  overflow-x: clip;
  background: var(--color-black);
  color: var(--color-ink);
  color-scheme: dark;
  font-family: var(--font-body);
}

button,
input,
textarea {
  font: inherit;
}

button,
input,
textarea {
  border-radius: 0;
}

.adminShell,
.loginShell {
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.loginShell {
  display: grid;
  min-height: 100vh;
  place-items: center;
}

.loginPanel,
.mast,
.editor,
.cardEditor,
.empty,
.noticeBanner {
  border: 2px solid var(--color-line);
  background: var(--color-panel);
  box-shadow: var(--shadow-hard);
}

.loginPanel {
  width: min(560px, 100%);
  padding: 28px;
}

.loginPanel h1 {
  font-size: clamp(3.6rem, 11vw, 7rem);
  line-height: 0.9;
}

.mast {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 360px);
  min-height: 290px;
}

.mast > div {
  padding: 28px;
}

.stamp {
  display: inline-block;
  margin: 0;
  padding: 7px 10px;
  background: var(--color-ink);
  color: var(--color-black);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  margin: 28px 0 0;
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: 0.78;
  overflow-wrap: anywhere;
  text-transform: uppercase;
}

.statusRail {
  display: grid;
  grid-template-rows: auto 1fr auto auto auto;
  gap: 18px;
  padding: 28px;
  border-left: 2px solid var(--color-line);
  background: var(--color-black);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.statusRail span {
  width: max-content;
  max-width: 100%;
  padding: 5px 7px;
  background: var(--color-ink);
  color: var(--color-black);
  font-weight: 900;
}

.statusRail strong {
  align-self: center;
  overflow-wrap: anywhere;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding-top: 36px;
}

.editor,
.cardEditor,
.empty,
.noticeBanner {
  padding: 18px;
}

.noticeBanner {
  margin-top: 28px;
  color: var(--color-ink);
  font-family: var(--font-mono);
  overflow-wrap: anywhere;
}

.editor {
  position: sticky;
  top: 18px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 28px;
}

label {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

label span {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
}

input,
textarea {
  width: 100%;
  min-width: 0;
  border: 2px solid var(--color-line);
  background: var(--color-black);
  color: var(--color-ink);
  padding: 10px 12px;
}

textarea {
  resize: vertical;
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-line);
  outline-offset: 3px;
}

.checkline {
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
}

.checkline input {
  width: 18px;
  height: 18px;
}

button {
  width: 100%;
  min-height: 44px;
  margin-top: 16px;
  border: 2px solid var(--color-line);
  background: var(--color-ink);
  color: var(--color-black);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 900;
  text-transform: uppercase;
  transition: background 140ms ease, color 140ms ease, box-shadow 140ms ease;
}

.linkButton {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 44px;
  border: 2px solid var(--color-line);
  background: var(--color-ink);
  color: var(--color-black);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 900;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 140ms ease, color 140ms ease, box-shadow 140ms ease;
}

button:hover {
  background: var(--color-black);
  color: var(--color-ink);
  box-shadow: 4px 4px 0 var(--color-line);
}

.linkButton:hover,
.linkButton:focus-visible {
  background: var(--color-black);
  color: var(--color-ink);
  outline: 2px solid var(--color-line);
  outline-offset: 3px;
  box-shadow: 4px 4px 0 var(--color-line);
}

.smallButton {
  margin-top: 0;
}

.danger {
  background: var(--color-black);
  color: var(--color-ink);
}

.rowActions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
}

.cardEditor img,
.imageEmpty {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 2px solid var(--color-line);
  background: var(--color-black);
  object-fit: cover;
}

.imageEmpty,
.empty,
.notice {
  display: grid;
  place-items: center;
  min-height: 180px;
  color: var(--color-muted);
}

.notice {
  min-height: auto;
  place-items: start;
  margin: 24px 0 0;
}

.loginForm {
  margin-top: 28px;
}

@media (max-width: 860px) {
  .adminShell,
  .loginShell {
    width: min(100% - 20px, 720px);
    padding-top: 14px;
  }

  .mast,
  .workbench {
    grid-template-columns: minmax(0, 1fr);
  }

  .statusRail {
    border-top: 2px solid var(--color-line);
    border-left: 0;
  }

  .editor {
    position: static;
  }
}

@media (max-width: 420px) {
  .adminShell,
  .loginShell {
    width: min(100% - 14px, 390px);
  }

  .rowActions {
    grid-template-columns: minmax(0, 1fr);
  }
}
`;