const apiBase = "";

const speciesList = document.querySelector("#species-list");
const searchInput = document.querySelector("#search");
const archiveFilterGroup = document.querySelector("#archive-filter-group");
const detailEmpty = document.querySelector("#detail-empty");
const detail = document.querySelector("#detail");
const detailCode = document.querySelector("#detail-code");
const detailCommonName = document.querySelector("#detail-common-name");
const detailArchiveBadge = document.querySelector("#detail-archive-badge");
const detailArchiveNote = document.querySelector("#detail-archive-note");
const detailScientificName = document.querySelector("#detail-scientific-name");
const detailSummary = document.querySelector("#detail-summary");
const detailSections = document.querySelector("#detail-sections");
const speciesCount = document.querySelector("#species-count");
const sectionCount = document.querySelector("#section-count");
const authTokenInput = document.querySelector("#auth-token");
const authSaveButton = document.querySelector("#auth-save");
const authClearButton = document.querySelector("#auth-clear");
const authStatus = document.querySelector("#auth-status");
const editorPanel = document.querySelector("#editor-panel");
const editorPublicationStatus = document.querySelector("#editor-publication-status");
const editorSummary = document.querySelector("#editor-summary");
const editorNotes = document.querySelector("#editor-notes");
const editorIsArchived = document.querySelector("#editor-is-archived");
const editorSaveButton = document.querySelector("#editor-save");
const editorStatus = document.querySelector("#editor-status");
const auditPanel = document.querySelector("#audit-panel");
const auditList = document.querySelector("#audit-list");

let currentItems = [];
let currentSlug = null;
let currentSession = null;
let currentArchiveFilter = "active";

function getAuthToken() {
  return window.localStorage.getItem("ecospecies_auth_token") || "";
}

function getAuthHeaders() {
  const token = getAuthToken();
  return token ? { Authorization: `Bearer ${token}` } : {};
}

function escapeHtml(value) {
  return value
    .replaceAll("&", "&")
    .replaceAll("<", "&lt;")
    .replaceAll(">", "&gt;");
}

async function requestJson(path, options = {}) {
  const headers = new Headers(options.headers || {});
  const authHeaders = getAuthHeaders();
  for (const [key, value] of Object.entries(authHeaders)) {
    headers.set(key, value);
  }
  if (options.body && !headers.has("Content-Type")) {
    headers.set("Content-Type", "application/json");
  }
  const response = await fetch(`${apiBase}${path}`, { ...options, headers });
  const data = await response.json();
  return { response, data };
}

function isEditorSession() {
  return Boolean(currentSession && currentSession.user && ["editor", "admin"].includes(currentSession.user.role));
}

function getVisibleItems(items) {
  if (!isEditorSession()) {
    return items;
  }
  if (currentArchiveFilter === "archived") {
    return items.filter((item) => item.is_archived);
  }
  if (currentArchiveFilter === "all") {
    return items;
  }
  return items.filter((item) => !item.is_archived);
}

function syncArchiveFilterUi() {
  archiveFilterGroup.classList.toggle("hidden", !isEditorSession());
  for (const button of archiveFilterGroup.querySelectorAll("[data-archive-filter]")) {
    button.classList.toggle("is-active", button.dataset.archiveFilter === currentArchiveFilter);
  }
}

async function loadSession() {
  const { data } = await requestJson("/api/auth/session");
  currentSession = data;
  if (!isEditorSession()) {
    currentArchiveFilter = "active";
  }
  authTokenInput.value = getAuthToken();
  if (data.authenticated) {
    authStatus.textContent = `${data.user.username} (${data.user.role})`;
  } else if (data.auth_configured) {
    authStatus.textContent = "Auth configured, public session";
  } else {
    authStatus.textContent = "Public access";
  }
  syncArchiveFilterUi();
}

async function loadSummary() {
  const { data } = await requestJson("/api/insights/summary");
  speciesCount.textContent = data.species_count;
  sectionCount.textContent = data.section_count;
}

function renderSpecies(items) {
  speciesList.innerHTML = "";
  const visibleItems = getVisibleItems(items);

  if (!visibleItems.length) {
    speciesList.innerHTML = `<p class="editor-status">${isEditorSession() ? "No species match the current archive filter." : "No species match the current search."}</p>`;
    return;
  }

  for (const item of visibleItems) {
    const button = document.createElement("button");
    button.className = item.is_archived ? "species-card species-card-archived" : "species-card";
    button.type = "button";
    const archivedMeta = item.is_archived ? `<span class="species-state-badge">Archived</span>` : "";
    button.innerHTML = `
      <span class="species-name">${escapeHtml(item.common_name || item.title)}</span>
      <span class="species-meta">${escapeHtml(item.scientific_name || "Scientific name missing")}</span>
      <span class="species-meta">${escapeHtml(item.publication_status || "published")}${archivedMeta}</span>
      <span class="species-meta">${item.diagnostic_count ? `${item.diagnostic_count} ingest flags` : "No ingest flags"}</span>
      <span class="species-snippet">${escapeHtml((item.summary || "No summary extracted yet.").slice(0, 180))}</span>
    `;
    button.addEventListener("click", () => loadSpecies(item.slug));
    speciesList.appendChild(button);
  }
}

async function loadSpeciesList(search = "") {
  const query = search ? `?search=${encodeURIComponent(search)}` : "";
  const path = isEditorSession() ? `/api/editor/species${query}` : `/api/species${query}`;
  const { data } = await requestJson(path);
  currentItems = data.items;
  syncArchiveFilterUi();
  renderSpecies(currentItems);
}

async function loadSpecies(slug) {
  currentSlug = slug;
  const path = isEditorSession() ? `/api/editor/species/${slug}` : `/api/species/${slug}`;
  const { response, data } = await requestJson(path);
  if (!response.ok) {
    detailEmpty.classList.remove("hidden");
    detail.classList.add("hidden");
    speciesList.innerHTML = `<p class="error">${escapeHtml(data.error || "Unable to load species.")}</p>`;
    return;
  }

  detailEmpty.classList.add("hidden");
  detail.classList.remove("hidden");

  detailCode.textContent = data.flelmr_code ? `FLELMR ${data.flelmr_code}` : "Legacy source file";
  detailCommonName.textContent = data.common_name || data.title;
  detailArchiveBadge.classList.toggle("hidden", !data.is_archived);
  detailArchiveNote.classList.toggle("hidden", !data.is_archived);
  detailScientificName.textContent = data.scientific_name || "Scientific name missing in source";
  detailSummary.textContent = data.summary || "No summary extracted from the current source file.";
  editorPanel.classList.toggle("hidden", !isEditorSession());
  auditPanel.classList.toggle("hidden", !isEditorSession());
  if (isEditorSession()) {
    editorPublicationStatus.value = data.publication_status || "published";
    editorSummary.value = data.summary || "";
    editorNotes.value = data.editor_notes || "";
    editorIsArchived.checked = Boolean(data.is_archived);
    editorStatus.textContent = data.last_modified_by
      ? `Last modified by ${data.last_modified_by}`
      : "Editor session active";
    await loadAudit(slug);
  }

  detailSections.innerHTML = "";
  if (data.diagnostics.length) {
    const diagnosticsEl = document.createElement("section");
    diagnosticsEl.className = "detail-section detail-diagnostics";
    diagnosticsEl.innerHTML = `
      <h3>Ingest Diagnostics</h3>
      <ul class="diagnostic-list">
        ${data.diagnostics
          .map(
            (diagnostic) =>
              `<li><strong>${escapeHtml(diagnostic.code)}</strong>: ${escapeHtml(diagnostic.message)}</li>`,
          )
          .join("")}
      </ul>
    `;
    detailSections.appendChild(diagnosticsEl);
  }
  for (const section of data.sections) {
    const sectionEl = document.createElement("section");
    sectionEl.className = "detail-section";
    if (isEditorSession()) {
      sectionEl.innerHTML = `
        <h3>${escapeHtml(section.heading)}</h3>
        <textarea class="section-editor" data-section-position="${section.position}" rows="10">${escapeHtml(section.content)}</textarea>
        <div class="editor-actions">
          <button type="button" class="section-save" data-section-position="${section.position}">Save Section</button>
        </div>
      `;
    } else {
      sectionEl.innerHTML = `
        <h3>${escapeHtml(section.heading)}</h3>
        <pre>${escapeHtml(section.content)}</pre>
      `;
    }
    detailSections.appendChild(sectionEl);
  }

  if (isEditorSession()) {
    for (const button of detailSections.querySelectorAll(".section-save")) {
      button.addEventListener("click", async (event) => {
        const position = event.currentTarget.dataset.sectionPosition;
        const textarea = detailSections.querySelector(`textarea[data-section-position="${position}"]`);
        await saveSectionContent(Number(position), textarea.value);
      });
    }
  }
}

function renderAudit(items) {
  auditList.innerHTML = "";
  if (!items.length) {
    auditList.innerHTML = `<p class="editor-status">No audit entries yet.</p>`;
    return;
  }

  for (const item of items) {
    const entry = document.createElement("article");
    entry.className = "audit-entry";
    const detailRows = Object.entries(item.details)
      .map(([field, values]) => {
        if (values && typeof values === "object" && "from" in values && "to" in values) {
          return `<li><strong>${escapeHtml(field)}</strong>: ${escapeHtml(String(values.from || ""))} -> ${escapeHtml(String(values.to || ""))}</li>`;
        }
        return `<li><strong>${escapeHtml(field)}</strong>: ${escapeHtml(String(values ?? ""))}</li>`;
      })
      .join("");
    entry.innerHTML = `
      <p class="audit-meta">${escapeHtml(item.changed_by)} • ${escapeHtml(item.changed_at)} • ${escapeHtml(item.action)}</p>
      <ul class="diagnostic-list">${detailRows}</ul>
    `;
    auditList.appendChild(entry);
  }
}

async function loadAudit(slug) {
  if (!isEditorSession()) {
    return;
  }
  const { response, data } = await requestJson(`/api/editor/species/${slug}/audit`);
  if (!response.ok) {
    auditList.innerHTML = `<p class="error">${escapeHtml(data.error || "Unable to load audit history.")}</p>`;
    return;
  }
  renderAudit(data.items);
}

async function saveEditorialChanges() {
  if (!currentSlug || !isEditorSession()) {
    return;
  }
  editorStatus.textContent = "Saving...";
  const { response, data } = await requestJson(`/api/editor/species/${currentSlug}/editorial`, {
    method: "POST",
    body: JSON.stringify({
      publication_status: editorPublicationStatus.value,
      summary: editorSummary.value,
      editor_notes: editorNotes.value,
      is_archived: editorIsArchived.checked,
    }),
  });
  if (!response.ok) {
    editorStatus.textContent = data.error || "Save failed";
    return;
  }
  editorStatus.textContent = `Saved by ${data.last_modified_by}`;
  await Promise.all([loadSummary(), loadSpeciesList(searchInput.value), loadSpecies(currentSlug)]);
}

async function saveSectionContent(sectionPosition, content) {
  if (!currentSlug || !isEditorSession()) {
    return;
  }
  editorStatus.textContent = `Saving section ${sectionPosition}...`;
  const { response, data } = await requestJson(`/api/editor/species/${currentSlug}/sections/${sectionPosition}`, {
    method: "POST",
    body: JSON.stringify({ content }),
  });
  if (!response.ok) {
    editorStatus.textContent = data.error || "Section save failed";
    return;
  }
  editorStatus.textContent = `Section ${sectionPosition} saved by ${data.last_modified_by}`;
  await loadSpecies(currentSlug);
}

searchInput.addEventListener("input", async (event) => {
  await loadSpeciesList(event.target.value);
});

for (const button of archiveFilterGroup.querySelectorAll("[data-archive-filter]")) {
  button.addEventListener("click", () => {
    currentArchiveFilter = button.dataset.archiveFilter || "active";
    syncArchiveFilterUi();
    renderSpecies(currentItems);
  });
}

authSaveButton.addEventListener("click", async () => {
  const token = authTokenInput.value.trim();
  if (token) {
    window.localStorage.setItem("ecospecies_auth_token", token);
  }
  await loadSession();
  await loadSpeciesList(searchInput.value);
  if (currentSlug) {
    await loadSpecies(currentSlug);
  }
});

authClearButton.addEventListener("click", async () => {
  window.localStorage.removeItem("ecospecies_auth_token");
  authTokenInput.value = "";
  await loadSession();
  await loadSpeciesList(searchInput.value);
  if (currentSlug) {
    await loadSpecies(currentSlug);
  }
});

editorSaveButton.addEventListener("click", saveEditorialChanges);

async function bootstrap() {
  await loadSession();
  await Promise.all([loadSummary(), loadSpeciesList()]);
}

bootstrap().catch((error) => {
  speciesList.innerHTML = `<p class="error">Failed to load data: ${escapeHtml(String(error))}</p>`;
});