// ==UserScript==
// @name         Manga Bookmark Sync
// @namespace    mangabm
// @version      1.0.0
// @description  Track read progress on Asura & Demonic and sync to a self-hosted backend. Bromite-compatible (no GM_* APIs).
// @author       you
// @match        https://asuracomic.net/*
// @match        https://asurascans.com/*
// @match        https://demonicscans.org/*
// @run-at       document-idle
// @noframes
// ==/UserScript==

(function () {
  "use strict";

  // ============================================================
  // CONFIG — fill these in before installing.
  // ============================================================
  const API_BASE = "https://manga-api.violetcrown.my.id"; // your backend origin, no trailing slash
  const API_TOKEN = "40d79969b5442f90df4fe306a092c7c50e7b4a7a98099f98cc398f4fb374b1df"; // must equal backend API_TOKEN

  // Safe in Bromite's isolated world: the page's own JS cannot read these.
  const CACHE_KEY = "mangabm:cache";

  // ============================================================
  // Site adapters
  //
  // Page type + IDs come from URL regex (most stable); title/cover come from
  // og: meta tags. Verified live 2026-07-24 against asurascans.com and
  // demonicscans.org — see README "Adapter reference".
  // ============================================================

  function meta(prop) {
    const el = document.querySelector('meta[property="' + prop + '"]');
    return el ? el.getAttribute("content") : null;
  }

  const asura = {
    site: "asura",
    // asuracomic.net currently 301s to asurascans.com; match both.
    matches: (loc) => /(^|\.)asurascans\.com$|(^|\.)asuracomic\.net$/.test(loc.hostname),
    detect(loc) {
      const path = loc.pathname;
      // /comics/<slug-hash>/chapter/<n>
      let m = path.match(/^\/comics\/([^/]+)\/chapter\/([^/?#]+)/);
      if (m) {
        const num = parseFloat(m[2]);
        return {
          type: "chapter",
          site: this.site,
          seriesId: m[1],
          title: cleanTitle(meta("og:title")),
          cover: meta("og:image") || "",
          seriesUrl: loc.origin + "/comics/" + m[1],
          chapterLabel: "Chapter " + m[2],
          chapterNum: isNaN(num) ? null : num,
          chapterUrl: loc.href,
        };
      }
      // /comics/<slug-hash>
      m = path.match(/^\/comics\/([^/?#]+)\/?$/);
      if (m) {
        return {
          type: "series",
          site: this.site,
          seriesId: m[1],
          title: cleanTitle(meta("og:title")),
          cover: meta("og:image") || "",
          seriesUrl: loc.origin + "/comics/" + m[1],
          chapterLabel: null,
          chapterNum: null,
          chapterUrl: null,
        };
      }
      return { type: "other" };

      // Strips "Chapter N - Read Online" and the " | Asura Scans" suffix.
      function cleanTitle(t) {
        if (!t) return "";
        return t
          .replace(/\s*Chapter\s+[\d.]+\s*-\s*Read Online\s*/i, " ")
          .replace(/\s*\|\s*Asura Scans\s*$/i, "")
          .trim();
      }
    },
  };

  const demonic = {
    site: "demonic",
    matches: (loc) => /(^|\.)demonicscans\.org$/.test(loc.hostname),
    detect(loc) {
      const path = loc.pathname;
      // Canonical reader: /title/<slug>/chapter/<n>/<page>
      // (chaptered.php?manga=<id>&chapter=<n> 301s to this before we run.)
      let m = path.match(/^\/title\/([^/]+)\/chapter\/([^/?#]+)/);
      if (m) {
        const num = parseFloat(m[2]);
        return {
          type: "chapter",
          site: this.site,
          seriesId: decodeURIComponent(m[1]),
          title: cleanTitle(meta("og:title")),
          cover: meta("og:image") || "",
          seriesUrl: loc.origin + "/manga/" + m[1],
          chapterLabel: "Chapter " + m[2],
          chapterNum: isNaN(num) ? null : num,
          chapterUrl: loc.href,
        };
      }
      // Series: /manga/<slug>
      m = path.match(/^\/manga\/([^/?#]+)/);
      if (m) {
        return {
          type: "series",
          site: this.site,
          seriesId: decodeURIComponent(m[1]),
          title: cleanTitle(meta("og:title")),
          cover: meta("og:image") || "",
          seriesUrl: loc.origin + "/manga/" + m[1],
          chapterLabel: null,
          chapterNum: null,
          chapterUrl: null,
        };
      }
      return { type: "other" };

      // Demonic chapter og:title is "<Title> Chapter N"; series is clean.
      function cleanTitle(t) {
        if (!t) return "";
        return t.replace(/\s*Chapter\s+[\d.]+\s*$/i, "").trim();
      }
    },
  };

  const ADAPTERS = [asura, demonic];

  function detect() {
    const loc = window.location;
    for (const a of ADAPTERS) {
      if (a.matches(loc)) return a.detect(loc);
    }
    return { type: "other" };
  }

  function keyOf(page) {
    return page.site + ":" + page.seriesId;
  }

  // ============================================================
  // API client + local cache
  // ============================================================

  function loadCache() {
    try {
      const raw = localStorage.getItem(CACHE_KEY);
      return raw ? JSON.parse(raw) : [];
    } catch (e) {
      return [];
    }
  }

  function saveCache(list) {
    try {
      localStorage.setItem(CACHE_KEY, JSON.stringify(list));
    } catch (e) {
      /* quota / private mode — ignore */
    }
  }

  function authHeaders(extra) {
    return Object.assign({ Authorization: "Bearer " + API_TOKEN }, extra || {});
  }

  async function apiGet() {
    const res = await fetch(API_BASE + "/bookmarks", { headers: authHeaders() });
    if (!res.ok) throw new Error("GET /bookmarks " + res.status);
    return res.json();
  }

  async function apiPut(key, obj) {
    const res = await fetch(API_BASE + "/bookmarks/" + encodeURIComponent(key), {
      method: "PUT",
      headers: authHeaders({ "Content-Type": "application/json" }),
      body: JSON.stringify(obj),
    });
    if (!res.ok) throw new Error("PUT /bookmarks " + res.status);
    return res.json();
  }

  async function apiDelete(key) {
    const res = await fetch(API_BASE + "/bookmarks/" + encodeURIComponent(key), {
      method: "DELETE",
      headers: authHeaders(),
    });
    if (!res.ok) throw new Error("DELETE /bookmarks " + res.status);
  }

  // ============================================================
  // State
  // ============================================================

  const state = {
    list: loadCache(), // last-known bookmarks (array)
    byKey: {},
    page: { type: "other" },
  };
  reindex();

  function reindex() {
    state.byKey = {};
    for (const b of state.list) state.byKey[b.key] = b;
    state.list.sort((a, b) => (b.updated_at || 0) - (a.updated_at || 0));
  }

  function setList(list) {
    state.list = Array.isArray(list) ? list : [];
    reindex();
    saveCache(state.list);
  }

  function upsertLocal(bm) {
    const i = state.list.findIndex((b) => b.key === bm.key);
    if (i >= 0) state.list[i] = bm;
    else state.list.push(bm);
    reindex();
    saveCache(state.list);
  }

  function removeLocal(key) {
    state.list = state.list.filter((b) => b.key !== key);
    reindex();
    saveCache(state.list);
  }

  // ============================================================
  // Mutations (optimistic: update UI/cache first, then sync)
  // ============================================================

  async function bookmarkCurrent() {
    const p = state.page;
    if (p.type !== "series" && p.type !== "chapter") return;
    const key = keyOf(p);
    const existing = state.byKey[key];
    const bm = {
      key: key,
      site: p.site,
      series_id: p.seriesId,
      title: p.title || (existing && existing.title) || p.seriesId,
      series_url: p.seriesUrl || (existing && existing.series_url) || "",
      cover: p.cover || (existing && existing.cover) || "",
      last_chapter: p.chapterLabel || (existing && existing.last_chapter) || "",
      last_chapter_num:
        p.chapterNum != null ? p.chapterNum : existing ? existing.last_chapter_num : null,
      last_chapter_url: p.chapterUrl || (existing && existing.last_chapter_url) || "",
      updated_at: Date.now(),
    };
    await syncUpsert(bm, "Bookmarked");
  }

  async function updateToCurrentChapter() {
    const p = state.page;
    if (p.type !== "chapter") return;
    const key = keyOf(p);
    const existing = state.byKey[key] || {};
    const bm = Object.assign({}, existing, {
      key: key,
      site: p.site,
      series_id: p.seriesId,
      title: existing.title || p.title || p.seriesId,
      series_url: existing.series_url || p.seriesUrl || "",
      cover: existing.cover || p.cover || "",
      last_chapter: p.chapterLabel || "",
      last_chapter_num: p.chapterNum,
      last_chapter_url: p.chapterUrl || "",
      updated_at: Date.now(),
    });
    await syncUpsert(bm, "Progress updated");
  }

  // Manual override from the panel input — forces any value.
  async function setChapterManual(key, label, num, url) {
    const existing = state.byKey[key];
    if (!existing) return;
    const bm = Object.assign({}, existing, {
      last_chapter: label,
      last_chapter_num: isNaN(num) ? existing.last_chapter_num : num,
      last_chapter_url: url || existing.last_chapter_url,
      updated_at: Date.now(),
    });
    await syncUpsert(bm, "Progress set");
  }

  async function syncUpsert(bm, okMsg) {
    upsertLocal(bm); // optimistic
    render();
    try {
      const saved = await apiPut(bm.key, bm);
      upsertLocal(saved); // adopt server updated_at
      render();
      toast(okMsg);
    } catch (e) {
      toast("Offline — saved locally, will retry", true);
    }
  }

  async function removeBookmark(key) {
    removeLocal(key); // optimistic
    render();
    try {
      await apiDelete(key);
      toast("Removed");
    } catch (e) {
      toast("Offline — remove will retry", true);
    }
  }

  // Auto-record on opening a chapter of a bookmarked series.
  async function maybeAutoUpdate() {
    const p = state.page;
    if (p.type !== "chapter") return;
    const existing = state.byKey[keyOf(p)];
    if (!existing) return; // only track series the user bookmarked

    const cur = p.chapterNum;
    const prev = existing.last_chapter_num;
    // Advance when current >= stored, or when either is unparseable (set current).
    const advance = cur == null || prev == null || cur >= prev;
    if (!advance) return;
    if (existing.last_chapter_url === p.chapterUrl && existing.last_chapter === p.chapterLabel) {
      return; // already recorded
    }
    await updateToCurrentChapter();
  }

  // ============================================================
  // UI — Shadow DOM (isolated from site CSS)
  // ============================================================

  let root, panelOpen = false;

  function buildUI() {
    const host = document.createElement("div");
    host.id = "mangabm-host";
    host.style.cssText = "all: initial;";
    (document.body || document.documentElement).appendChild(host);
    root = host.attachShadow({ mode: "open" });

    const style = document.createElement("style");
    style.textContent = CSS;
    root.appendChild(style);

    const wrap = document.createElement("div");
    wrap.id = "wrap";
    wrap.innerHTML = TEMPLATE;
    root.appendChild(wrap);

    root.getElementById("fab").addEventListener("click", togglePanel);
    root.getElementById("backdrop").addEventListener("click", togglePanel);
    root.getElementById("closeBtn").addEventListener("click", togglePanel);
  }

  function togglePanel() {
    panelOpen = !panelOpen;
    render();
    if (panelOpen) refresh(); // pull latest from server on open
  }

  function el(tag, props, children) {
    const e = document.createElement(tag);
    if (props) for (const k in props) {
      if (k === "text") e.textContent = props[k];
      else if (k === "html") e.innerHTML = props[k];
      else if (k.slice(0, 2) === "on") e.addEventListener(k.slice(2).toLowerCase(), props[k]);
      else e.setAttribute(k, props[k]);
    }
    if (children) for (const c of children) if (c) e.appendChild(c);
    return e;
  }

  function render() {
    if (!root) return;
    root.getElementById("panel").classList.toggle("open", panelOpen);
    root.getElementById("backdrop").classList.toggle("open", panelOpen);

    // Context header for the current page.
    const ctx = root.getElementById("context");
    ctx.innerHTML = "";
    const p = state.page;
    if (p.type === "series" || p.type === "chapter") {
      const key = keyOf(p);
      const existing = state.byKey[key];
      ctx.appendChild(el("div", { class: "ctx-title", text: p.title || p.seriesId }));
      if (!existing) {
        ctx.appendChild(el("button", { class: "btn primary", text: "+ Bookmark this", onclick: () => bookmarkCurrent() }));
      } else {
        const cur = existing.last_chapter || "—";
        ctx.appendChild(el("div", { class: "ctx-sub", text: "Tracked · last read: " + cur }));
        if (p.type === "chapter" && p.chapterLabel && p.chapterLabel !== existing.last_chapter) {
          ctx.appendChild(el("button", { class: "btn primary", text: "Update to " + p.chapterLabel, onclick: () => updateToCurrentChapter() }));
        }
      }
    } else {
      ctx.appendChild(el("div", { class: "ctx-sub", text: "Open a series or chapter to bookmark it." }));
    }

    // Bookmark list.
    const listEl = root.getElementById("list");
    listEl.innerHTML = "";
    if (state.list.length === 0) {
      listEl.appendChild(el("div", { class: "empty", text: "No bookmarks yet." }));
    }
    for (const b of state.list) {
      listEl.appendChild(renderItem(b));
    }
  }

  function renderItem(b) {
    const cont = b.last_chapter_url || b.series_url || "#";
    const row = el("div", { class: "item" }, [
      b.cover
        ? el("img", { class: "cover", src: b.cover, loading: "lazy", alt: "" })
        : el("div", { class: "cover ph" }),
      el("div", { class: "meta" }, [
        el("div", { class: "t", text: b.title || b.series_id }),
        el("div", { class: "c", text: (b.last_chapter || "—") + " · " + b.site }),
        el("div", { class: "actions" }, [
          el("a", { class: "btn small", href: cont, text: "Continue" }),
          el("button", { class: "btn small", text: "Edit", onclick: () => editChapter(b) }),
          el("button", { class: "btn small danger", text: "Remove", onclick: () => removeBookmark(b.key) }),
        ]),
      ]),
    ]);
    return row;
  }

  function editChapter(b) {
    const raw = prompt("Set last-read chapter for \"" + (b.title || b.series_id) + "\":", b.last_chapter || "");
    if (raw == null) return;
    const label = raw.trim();
    const num = parseFloat((label.match(/[\d.]+/) || [])[0]);
    setChapterManual(b.key, label, num, b.last_chapter_url);
  }

  // Toast inside the shadow root.
  function toast(msg, isErr) {
    if (!root) return;
    const t = el("div", { class: "toast" + (isErr ? " err" : ""), text: msg });
    root.getElementById("toasts").appendChild(t);
    setTimeout(() => t.classList.add("show"), 10);
    setTimeout(() => {
      t.classList.remove("show");
      setTimeout(() => t.remove(), 300);
    }, 2600);
  }

  // ============================================================
  // Refresh + navigation
  // ============================================================

  async function refresh() {
    try {
      const list = await apiGet();
      setList(list);
      render();
    } catch (e) {
      render(); // fall back to cache
    }
  }

  let lastUrl = location.href;
  function onNavigate() {
    state.page = detect();
    render();
    maybeAutoUpdate();
  }

  // Framework-agnostic URL-change watcher: patch history + poll as a fallback,
  // so it works whether the site is client-routed (Asura) or reloads (Demonic).
  function installNavWatcher() {
    const fire = () => {
      if (location.href !== lastUrl) {
        lastUrl = location.href;
        // Meta tags update slightly after the URL on client routes.
        setTimeout(onNavigate, 300);
      }
    };
    const wrap = (name) => {
      const orig = history[name];
      history[name] = function () {
        const r = orig.apply(this, arguments);
        fire();
        return r;
      };
    };
    wrap("pushState");
    wrap("replaceState");
    window.addEventListener("popstate", fire);
    setInterval(fire, 1500); // catch routes that bypass history
  }

  // ============================================================
  // Boot
  // ============================================================

  function init() {
    buildUI();
    state.page = detect();
    render();
    installNavWatcher();
    refresh().then(() => maybeAutoUpdate()); // sync, then auto-record this page
  }

  // ============================================================
  // Markup + styles (kept at bottom for readability)
  // ============================================================

  const TEMPLATE = `
    <button id="fab" aria-label="Manga bookmarks">📑</button>
    <div id="backdrop"></div>
    <aside id="panel" role="dialog" aria-label="Manga bookmarks">
      <header>
        <span>Manga Bookmarks</span>
        <button id="closeBtn" aria-label="Close">✕</button>
      </header>
      <section id="context"></section>
      <div id="list"></div>
    </aside>
    <div id="toasts"></div>
  `;

  const CSS = `
    :host { all: initial; }
    * { box-sizing: border-box; font-family: system-ui, -apple-system, sans-serif; }
    #fab {
      position: fixed; right: 16px;
      bottom: calc(16px + env(safe-area-inset-bottom, 0px));
      width: 52px; height: 52px; border-radius: 50%; border: none;
      background: #6d28d9; color: #fff; font-size: 22px; line-height: 52px;
      box-shadow: 0 4px 14px rgba(0,0,0,.4); z-index: 2147483646; cursor: pointer;
    }
    #fab:active { transform: scale(.94); }
    #backdrop {
      position: fixed; inset: 0; background: rgba(0,0,0,.5);
      opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 2147483646;
    }
    #backdrop.open { opacity: 1; pointer-events: auto; }
    #panel {
      position: fixed; top: 0; right: 0; height: 100%;
      width: min(400px, 92vw); background: #1b1b22; color: #eee;
      transform: translateX(105%); transition: transform .25s ease;
      z-index: 2147483647; display: flex; flex-direction: column;
      padding-bottom: env(safe-area-inset-bottom, 0px);
      box-shadow: -4px 0 20px rgba(0,0,0,.5);
    }
    #panel.open { transform: translateX(0); }
    header {
      display: flex; align-items: center; justify-content: space-between;
      padding: 14px 16px; border-bottom: 1px solid #33333d; font-weight: 600; font-size: 16px;
    }
    #closeBtn { background: none; border: none; color: #aaa; font-size: 18px; cursor: pointer; }
    #context {
      padding: 12px 16px; border-bottom: 1px solid #33333d;
      display: flex; flex-direction: column; gap: 8px;
    }
    .ctx-title { font-weight: 600; font-size: 15px; }
    .ctx-sub { color: #9a9aa5; font-size: 13px; }
    #list { overflow-y: auto; flex: 1; padding: 8px 0; }
    .empty { color: #9a9aa5; text-align: center; padding: 30px 16px; font-size: 14px; }
    .item { display: flex; gap: 10px; padding: 10px 16px; border-bottom: 1px solid #2a2a33; }
    .cover { width: 46px; height: 62px; object-fit: cover; border-radius: 4px; flex: none; background: #333; }
    .cover.ph { display: block; }
    .meta { min-width: 0; flex: 1; }
    .t { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .c { color: #9a9aa5; font-size: 12px; margin: 2px 0 8px; }
    .actions { display: flex; gap: 6px; flex-wrap: wrap; }
    .btn {
      background: #33333d; color: #eee; border: none; border-radius: 6px;
      padding: 8px 12px; font-size: 13px; cursor: pointer; text-decoration: none; display: inline-block;
    }
    .btn:active { opacity: .8; }
    .btn.primary { background: #6d28d9; color: #fff; }
    .btn.small { padding: 6px 10px; font-size: 12px; }
    .btn.danger { background: #7f1d1d; }
    #toasts {
      position: fixed; left: 50%; transform: translateX(-50%);
      bottom: calc(80px + env(safe-area-inset-bottom, 0px));
      z-index: 2147483647; display: flex; flex-direction: column; gap: 8px; align-items: center;
    }
    .toast {
      background: #2f2f3a; color: #fff; padding: 10px 16px; border-radius: 8px;
      font-size: 13px; opacity: 0; transform: translateY(10px); transition: all .3s;
      box-shadow: 0 4px 14px rgba(0,0,0,.4); max-width: 80vw;
    }
    .toast.show { opacity: 1; transform: translateY(0); }
    .toast.err { background: #7f1d1d; }
  `;

  // ============================================================
  // Boot — MUST run last: init() -> buildUI() reads TEMPLATE/CSS,
  // which are const (TDZ) and only initialized above. At
  // @run-at document-idle document.body already exists, so init()
  // fires synchronously here, after the consts are set.
  // ============================================================
  if (document.body) init();
  else document.addEventListener("DOMContentLoaded", init);
})();