/* =======================================================================
   File: static/js/dashboard.js
   Purpose:
     - Sidebar selectie
     - Start / Abort acties
     - UI status updates
   NOTE:
     - GEEN polling
     - state_updater.js is leidend
   ======================================================================= */

console.log("[DASHBOARD] loaded");

/* ---------------------------------------------------------
   Helpers
--------------------------------------------------------- */
async function apiGet(url) {
  console.log("[DASHBOARD][API] GET", url);
  try {
    const r = await fetch(url, { cache: "no-store" });
    if (!r.ok) {
      console.warn("[DASHBOARD][API] GET failed", url, r.status);
      return null;
    }
    return await r.json();
  } catch (e) {
    console.error("[DASHBOARD][API] GET error", url, e);
    return null;
  }
}

function safeUpdateLogs(data) {
  if (typeof window.updateLogs === "function") {
    console.log("[DASHBOARD] updateLogs()");
    window.updateLogs(data);
  }
}

/* ---------------------------------------------------------
   State
--------------------------------------------------------- */
let ACTIVE_BOOK_IDX = null;

/* ---------------------------------------------------------
   DOM READY
--------------------------------------------------------- */
document.addEventListener("DOMContentLoaded", () => {
  console.log("[DASHBOARD] DOMContentLoaded");

  bindSidebar();
  bindBookCardButtons();

  const first = document.querySelector(".book-list-item");
  if (first) {
    console.log("[DASHBOARD] auto-select", first.dataset.bookIdx);
    selectBook(first.dataset.bookIdx);
  }
});

/* ---------------------------------------------------------
   Sidebar
--------------------------------------------------------- */
function bindSidebar() {
  console.log("[DASHBOARD] bindSidebar()");
  document.querySelectorAll(".book-list-item").forEach((item) => {
    item.onclick = () => selectBook(item.dataset.bookIdx);
  });
}

function selectBook(bookIdx) {
  if (!bookIdx || bookIdx === ACTIVE_BOOK_IDX) return;

  ACTIVE_BOOK_IDX = bookIdx;
  console.log("[DASHBOARD] selectBook", bookIdx);

  document.querySelectorAll(".book-list-item").forEach((el) => {
    el.classList.toggle("active", el.dataset.bookIdx === bookIdx);
  });

  refreshBook(bookIdx);
}

/* ---------------------------------------------------------
   Book refresh (NO POLLING)
--------------------------------------------------------- */
async function refreshBook(bookIdx) {
  console.log("[DASHBOARD] refreshBook", bookIdx);

  const logs = await apiGet(`/api/book/${bookIdx}/logs`);
  if (logs) safeUpdateLogs(logs);

  refreshBookCards();
}

/* ---------------------------------------------------------
   Bookcard buttons
--------------------------------------------------------- */
function bindBookCardButtons() {
  console.log("[DASHBOARD] bindBookCardButtons()");

  document.querySelectorAll(".icon-start").forEach((btn) => {
    if (btn.dataset.bound) return;
    btn.dataset.bound = "1";

    btn.onclick = (e) => {
      e.preventDefault();
      const card = btn.closest(".book-card");
      if (!card) return;
      startBook(card.dataset.bookIdx);
    };
  });

  document.querySelectorAll(".icon-abort").forEach((btn) => {
    if (btn.dataset.bound) return;
    btn.dataset.bound = "1";

    btn.onclick = (e) => {
      e.preventDefault();
      const card = btn.closest(".book-card");
      if (!card) return;
      abortBook(card.dataset.bookIdx);
    };
  });
}

/* ---------------------------------------------------------
   START
--------------------------------------------------------- */
function startBook(bookIdx) {
  console.log("[DASHBOARD] START", bookIdx);

  fetch("/start", {
    method: "POST",
    headers: { "Content-Type": "application/x-www-form-urlencoded" },
    body: `book_idx=${bookIdx}`,
  }).then(() => refreshBook(bookIdx));
}

/* ---------------------------------------------------------
   ABORT
--------------------------------------------------------- */
function abortBook(bookIdx) {
  if (!confirm(`Abort book ${bookIdx}?`)) return;

  console.log("[DASHBOARD] ABORT", bookIdx);

  fetch(`/abort/${bookIdx}`, { method: "POST" }).then(() =>
    refreshBook(bookIdx)
  );
}

/* ---------------------------------------------------------
   Bookcard UI refresh (non-progress)
--------------------------------------------------------- */
async function refreshBookCards() {
  console.log("[DASHBOARD] refreshBookCards()");
  const books = await apiGet("/api/books");
  if (!books) return;

  document.querySelectorAll(".book-card").forEach((card) => {
    const idx = card.dataset.bookIdx;
    const info = books.find((b) => b.book_idx === idx);
    if (!info) return;

    console.log("[DASHBOARD] card status", idx, info.status);
    card.className = `book-card ${info.status}`;

    const abortBtn = card.querySelector(".icon-abort");
    if (abortBtn) {
      abortBtn.disabled = ![
        "processing",
        "downloading",
        "parsing",
        "audio",
      ].includes(info.status);
    }
  });
}