import { addService, updateService, removeService } from "./api.js";

// Renders service cards and wires UI controls for add/edit/remove operations.
// All mutations round-trip through the API then invoke onChange to refresh data.

let noticeModalRefs = null;
const DEFAULT_SELF_SIGNED_MSG =
  "This service uses a self-signed certificate. Expect a browser warning; proceed only if you trust this device.";

function isValidLink(str) {
  if (!str) return true; // empty is allowed
  try {
    const u = new URL(str);
    return u.protocol === "http:" || u.protocol === "https:";
  } catch (e) {
    return false;
  }
}

function normalizePath(path) {
  if (!path) return "";
  const trimmed = path.trim();
  if (!trimmed) return "";
  if (/\s/.test(trimmed)) return null; // no spaces or tabs in paths
  if (trimmed.startsWith("http://") || trimmed.startsWith("https://")) return null;
  return trimmed.startsWith("/") ? trimmed : `/${trimmed}`;
}

function validateServiceFields({ name, port, path, notice, notice_link }, setMsg, toast) {
  const fail = (m) => {
    setMsg("");
    toast?.(m, "error");
    return false;
  };
  if (!name || name.trim().length < 2) return fail("Name must be at least 2 characters.");
  if (name.length > 48) return fail("Name is too long (max 48 chars).");
  if (!Number.isInteger(port) || port < 1 || port > 65535) return fail("Port must be 1-65535.");
  if (path === null) return fail("Path must be relative (e.g. /admin) or blank.");
  if (path.length > 200) return fail("Path is too long (max 200 chars).");
  if (notice && notice.length > 180) return fail("Notice text too long (max 180 chars).");
  if (notice_link && notice_link.length > 200) return fail("Notice link too long (max 200 chars).");
  if (!isValidLink(notice_link)) return fail("Enter a valid URL (http/https) or leave blank.");
  return true;
}

function ensureNoticeModal() {
  if (noticeModalRefs) return noticeModalRefs;
  const modal = document.createElement("div");
  modal.className = "modal hidden";
  modal.id = "noticeModal";
  modal.innerHTML = `
    <div class="modal-card">
      <div class="panel-header">
        <div>
          <p class="eyebrow">Service notice</p>
          <h3 id="noticeTitle"></h3>
        </div>
        <button class="ghost icon-btn close-btn" id="noticeClose" title="Close">&times;</button>
      </div>
      <div class="modal-body">
        <p id="noticeText" class="hint"></p>
        <a id="noticeLink" class="notice-link" target="_blank" rel="noopener"></a>
      </div>
    </div>
  `;
  document.body.appendChild(modal);
  const title = modal.querySelector("#noticeTitle");
  const text = modal.querySelector("#noticeText");
  const link = modal.querySelector("#noticeLink");
  const closeBtn = modal.querySelector("#noticeClose");
  const close = () => modal.classList.add("hidden");
  closeBtn.addEventListener("click", close);
  modal.addEventListener("click", (e) => {
    if (e.target === modal) close();
  });
  noticeModalRefs = { modal, title, text, link, close };
  return noticeModalRefs;
}

export function renderServices(gridEl, services = [], { openAddService } = {}) {
  if (!gridEl) return;
  gridEl.innerHTML = "";
  if (!services.length) {
    gridEl.classList.add("empty");
    gridEl.innerHTML = `
      <div class="empty-state">
        <p>No web services detected yet.</p>
        <button id="addSvcCta">Add a service</button>
      </div>`;
    const cta = gridEl.querySelector("#addSvcCta");
    cta?.addEventListener("click", () => {
      if (typeof window !== "undefined" && window.__pikitOpenAddService) {
        window.__pikitOpenAddService();
      } else if (typeof openAddService === "function") {
        openAddService();
      }
    });
    return;
  }
  gridEl.classList.remove("empty");
  services.forEach((svc) => {
    const card = document.createElement("div");
    const scheme = svc.scheme === "https" ? "https" : "http";
    const path = normalizePath(svc.path) || "";
    const url = svc.url || `${scheme}://pikit:${svc.port}${path}`;
    const nameRaw = svc.name || svc.process || "service";
    const name = nameRaw.slice(0, 32);
    const isSelfSigned = !!svc.self_signed;
    const hasCustomNotice = !!(svc.notice && svc.notice.trim());
    const noticeText = hasCustomNotice ? svc.notice.trim() : "";
    const noticeLink = hasCustomNotice ? svc.notice_link || "" : "";
    card.className = `card clickable ${svc.online ? "" : "offline"}`.trim();
    card.dataset.url = url;
    card.dataset.path = path;
    card.tabIndex = 0;
    card.innerHTML = `
      <div class="service-header">
        <div class="status-dot ${svc.online ? "on" : "off"}"></div>
        <div class="pill" title="${nameRaw}">${name}</div>
      </div>
      <div class="service-url">${url}</div>
      <p class="hint">Port ${svc.port}</p>
      ${
        isSelfSigned
          ? `<span class="notice-pill self-signed-pill" title="${DEFAULT_SELF_SIGNED_MSG}">Self-signed</span>`
          : ""
      }
      <div class="service-menu">
        ${
          hasCustomNotice
            ? `<button class="ghost info-btn" title="Notice" data-notice="${encodeURIComponent(
                noticeText,
              )}" data-link="${encodeURIComponent(noticeLink)}">ℹ</button>`
            : ""
        }
        <button class="ghost menu-btn" title="Service actions" data-port="${svc.port}" data-name="${svc.name || ""}" data-scheme="${scheme}" data-path="${encodeURIComponent(
          path,
        )}" data-notice="${encodeURIComponent(svc.notice || "")}" data-notice-link="${encodeURIComponent(
          svc.notice_link || "",
        )}" data-self-signed="${svc.self_signed ? "1" : "0"}">⋮</button>
      </div>
    `;
    gridEl.appendChild(card);
  });
}

export function initServiceControls({ gridEl, menu, addForm, onChange, overlay, toast, openAddService }) {
  if (!gridEl) return;
  // Tracks which card was opened in the context menu
  let menuContext = null;

  const showBusy = overlay?.show || (() => {});
  const hideBusy = overlay?.hide || (() => {});

  const {
    modal,
    title,
    subtitle,
    renameInput,
    portInput,
    pathInput,
    schemeSelect,
    saveBtn,
    cancelBtn,
    removeBtn,
    msg,
    noticeInput,
    noticeLinkInput,
    selfSignedInput,
  } = menu;

  const {
    nameInput,
    portInput: addPortInput,
    pathInput: addPathInput,
    schemeSelect: addSchemeSelect,
    addBtn,
    msg: addMsg,
    noticeInput: addNoticeInput,
    noticeLinkInput: addNoticeLinkInput,
    selfSignedInput: addSelfSignedInput,
  } = addForm;

  function enforceTlsCheckbox(selectEl, checkbox) {
    if (!selectEl || !checkbox) return;
    const update = () => {
      const isHttps = selectEl.value === "https";
      checkbox.disabled = !isHttps;
      if (!isHttps) checkbox.checked = false;
    };
    selectEl.addEventListener("change", update);
    update();
  }

  gridEl.addEventListener("click", (e) => {
    const btn = e.target.closest(".menu-btn");
    if (!btn) return;
    const port = Number(btn.dataset.port);
    const name = btn.dataset.name || "";
    const schemeRaw = btn.dataset.scheme || "http";
    const scheme = schemeRaw === "https" ? "https" : "http";
    const path = decodeURIComponent(btn.dataset.path || "").trim();
    const notice = decodeURIComponent(btn.dataset.notice || "").trim();
    const notice_link = decodeURIComponent(btn.dataset.noticeLink || "").trim();
    const self_signed = btn.dataset.selfSigned === "1";
    menuContext = { port, name, scheme, path };
    if (title) title.textContent = `${name || "Service"} (${scheme}://${port})`;
    if (subtitle) {
      const p = normalizePath(path) || "";
      subtitle.textContent = `Current link: ${scheme}://pikit:${port}${p}`;
    }
    if (renameInput) renameInput.value = name;
    if (portInput) portInput.value = port;
    if (pathInput) pathInput.value = path;
    if (schemeSelect) schemeSelect.value = scheme;
    if (noticeInput) noticeInput.value = notice || "";
    if (noticeLinkInput) noticeLinkInput.value = notice_link || "";
    if (selfSignedInput) selfSignedInput.checked = !!self_signed;
    if (msg) msg.textContent = "";
    modal?.classList.remove("hidden");
  });

  gridEl.addEventListener("click", (e) => {
    if (e.target.closest(".menu-btn") || e.target.closest(".info-btn") || e.target.closest("a")) return;
    const card = e.target.closest(".card.clickable");
    if (!card) return;
    const url = card.dataset.url;
    if (url) window.open(url, "_blank", "noopener");
  });

  gridEl.addEventListener("keydown", (e) => {
    if (e.key !== "Enter" && e.key !== " ") return;
    const card = e.target.closest(".card.clickable");
    if (!card || e.target.closest(".menu-btn")) return;
    e.preventDefault();
    const url = card.dataset.url;
    if (url) window.open(url, "_blank", "noopener");
  });

  gridEl.addEventListener("click", (e) => {
    const infoBtn = e.target.closest(".info-btn");
    if (!infoBtn) return;
    e.stopPropagation();
    const text = decodeURIComponent(infoBtn.dataset.notice || "").trim();
    const link = decodeURIComponent(infoBtn.dataset.link || "").trim();
    const { modal, title, text: textEl, link: linkEl } = ensureNoticeModal();
    title.textContent = infoBtn.getAttribute("title") || "Notice";
    textEl.textContent = text || "No additional info.";
    if (link) {
      linkEl.textContent = "More info";
      linkEl.href = link;
      linkEl.classList.remove("hidden");
    } else {
      linkEl.textContent = "";
      linkEl.href = "";
      linkEl.classList.add("hidden");
    }
    modal.classList.remove("hidden");
  });

  enforceTlsCheckbox(schemeSelect, selfSignedInput);
  enforceTlsCheckbox(addSchemeSelect, addSelfSignedInput);

  async function menuAction(action, body = {}) {
    if (!menuContext) return;
    msg.textContent = "";
    try {
      const isRemove = action === "remove";
      const isSave = action === "save";
      if (isRemove) showBusy("Removing service", "Updating firewall rules…");
      if (isSave) showBusy("Saving service", "Opening/closing firewall rules as needed…");
      if (action === "remove") {
        await removeService({ port: menuContext.port });
      } else {
        await updateService({
          port: menuContext.port,
          name: body.name,
          new_port: body.new_port,
          scheme: body.scheme,
          path: body.path,
          notice: body.notice,
          notice_link: body.notice_link,
          self_signed: body.self_signed,
        });
      }
      msg.textContent = "";
      toast?.(isRemove ? "Service removed" : "Service saved", "success");
      modal?.classList.add("hidden");
      menuContext = null;
      await onChange?.();
    } catch (e) {
      const err = e.error || "Action failed.";
      msg.textContent = "";
      toast?.(err, "error");
    } finally {
      hideBusy();
    }
  }

  saveBtn?.addEventListener("click", () => {
    if (!menuContext) return;
    const name = (renameInput?.value || "").trim();
    const new_port = Number(portInput?.value);
    const scheme = schemeSelect?.value === "https" ? "https" : "http";
    const pathRaw = pathInput?.value ?? "";
    const path = normalizePath(pathRaw);
    const notice = (noticeInput?.value || "").trim();
    const notice_link = (noticeLinkInput?.value || "").trim();
    const self_signed = !!selfSignedInput?.checked;
    if (
      !validateServiceFields(
        { name, port: new_port, path, notice, notice_link },
        () => {},
        toast,
      )
    )
      return;
    menuAction("save", { name, new_port, scheme, path, notice, notice_link, self_signed });
  });
  cancelBtn?.addEventListener("click", () => {
    modal?.classList.add("hidden");
    msg.textContent = "";
    menuContext = null;
  });
  removeBtn?.addEventListener("click", () => menuAction("remove"));

  addBtn?.addEventListener("click", async () => {
    addMsg.textContent = "";
    const name = (nameInput?.value || "").trim();
    const port = Number(addPortInput?.value);
    const scheme = addSchemeSelect?.value === "https" ? "https" : "http";
    const pathRaw = addPathInput?.value ?? "";
    const path = normalizePath(pathRaw);
    const notice = (addNoticeInput?.value || "").trim();
    const notice_link = (addNoticeLinkInput?.value || "").trim();
    const self_signed = !!addSelfSignedInput?.checked;
    if (
      !validateServiceFields(
        { name, port, path, notice, notice_link },
        () => {},
        toast,
      )
    )
      return;
    addBtn.disabled = true;
    try {
      showBusy("Adding service", "Opening firewall rules…");
      await addService({ name, port, scheme, path, notice, notice_link, self_signed });
      addMsg.textContent = "";
      toast?.("Service added", "success");
      await onChange?.();
    } catch (e) {
      const err = e.error || "Failed to add.";
      addMsg.textContent = "";
      toast?.(err, "error");
    } finally {
      addBtn.disabled = false;
      hideBusy();
    }
  });
}