try {
  importScripts("https://cdn.jsdelivr.net/npm/localforage@1.10.0/dist/localforage.min.js");
} catch (e) {
}
const TARGET_SUBSTRING = "openrouter.ai/api/v1/chat/completions";
const THREADS_KEY = "threads_v1";
const SAVE_BYTES_THRESHOLD = 6 * 1024;
const SAVE_TIME_THRESHOLD = 800;
const BROADCAST_THROTTLE_MS = 600;
const gid = () => Math.random().toString(36).slice(2, 9) + "-" + Date.now().toString(36);
const now = () => Date.now();
let lfAvailable = typeof localforage !== "undefined";
let lfLoadError = lfAvailable ? null : "localforage not loaded (importScripts failed or blocked)";
async function broadcast(msg) {
  try {
    const clients = await self.clients.matchAll({ includeUncontrolled: true, type: "window" });
    for (const c of clients) {
      try {
        c.postMessage(msg);
      } catch (_) {
      }
    }
  } catch (_) {
  }
}
function logDebug(text) {
  try {
    console.log("[sw] " + text);
  } catch {
  }
  broadcast({ type: "sw-debug-log", ts: now(), text: String(text) });
}
function sanitizeForIDB(v) {
  try {
    return JSON.parse(JSON.stringify(v));
  } catch (e) {
    try {
      if (!Array.isArray(v)) return [];
      return v.map((t) => ({
        id: t && t.id,
        title: t && t.title,
        updatedAt: t && t.updatedAt,
        messages: Array.isArray(t && t.messages) ? t.messages.map((m) => ({ id: m && m.id, role: m && m.role, content: String(m && m.content || "") })) : []
      }));
    } catch (_) {
      return [];
    }
  }
}
async function writeThreadsViaLocalForage(threadsArr) {
  if (!lfAvailable) throw new Error("localforage unavailable: " + lfLoadError);
  const safeVal = sanitizeForIDB(threadsArr || []);
  try {
    await localforage.setItem(THREADS_KEY, safeVal);
    return { ok: true, method: "localforage.setItem", storedAs: "object" };
  } catch (err1) {
    try {
      await localforage.setItem(THREADS_KEY, JSON.stringify(safeVal));
      return { ok: true, method: "localforage.setItem(stringified)", storedAs: "string" };
    } catch (err2) {
      throw new Error("setItem failed: " + (err2 && err2.message ? err2.message : String(err1)));
    }
  }
}
async function readThreadsViaLocalForage() {
  if (!lfAvailable) throw new Error("localforage unavailable: " + lfLoadError);
  try {
    const v = await localforage.getItem(THREADS_KEY);
    if (typeof v === "string") {
      try {
        const parsed = JSON.parse(v);
        return Array.isArray(parsed) ? parsed : [];
      } catch {
        return [];
      }
    }
    return Array.isArray(v) ? v : [];
  } catch (err) {
    throw err;
  }
}
function pickLastThread(threads) {
  if (!threads || threads.length === 0) return null;
  const sorted = [...threads].sort((a, b) => (b.updatedAt || 0) - (a.updatedAt || 0));
  return sorted[0];
}
function upsertAssistantInThreadObj(threadObj, streamId, text) {
  threadObj.updatedAt = now();
  threadObj.messages = threadObj.messages || [];
  for (let i = threadObj.messages.length - 1; i >= 0; i--) {
    const m = threadObj.messages[i];
    if (m && m.sw_streamId === streamId) {
      m.content = text;
      m.contentParts = [{ type: "text", text }];
      m.updatedAt = now();
      m._sw_savedAt = now();
      return threadObj;
    }
  }
  const msg = {
    id: "swmsg-" + gid(),
    role: "assistant",
    content: text,
    contentParts: [{ type: "text", text }],
    kind: "assistant",
    sw_saved: true,
    sw_streamId: streamId,
    createdAt: now(),
    updatedAt: now(),
    _sw_savedAt: now()
  };
  threadObj.messages.push(msg);
  return threadObj;
}
async function flushToLastThreadUsingLF(streamId, accumulated, meta) {
  try {
    const threads = await readThreadsViaLocalForage();
    let thread = pickLastThread(threads);
    const createdAt = now();
    if (!thread) {
      thread = { id: "sw-thread-" + gid(), title: "Missed while backgrounded", pinned: false, updatedAt: createdAt, messages: [] };
      threads.unshift(thread);
    }
    upsertAssistantInThreadObj(thread, streamId, accumulated);
    const writeRes = await writeThreadsViaLocalForage(threads);
    return { ok: true, threadId: thread.id, writeRes };
  } catch (err) {
    return { ok: false, error: String(err && err.message ? err.message : err) };
  }
}
self.addEventListener("install", (ev) => {
  self.skipWaiting();
});
self.addEventListener("activate", (ev) => {
  ev.waitUntil(self.clients.claim());
});
const state = { totalIntercepted: 0, activeStreams: {}, lastStream: null };
self.addEventListener("fetch", (event) => {
  try {
    const url = String(event.request.url || "");
    if (!url.includes(TARGET_SUBSTRING)) return;
    event.respondWith((async () => {
      const upstream = await fetch(event.request);
      if (!upstream || !upstream.body) return upstream;
      const streamId = "sw-" + gid();
      const meta = { url, startedAt: now(), bytes: 0, status: "started" };
      state.totalIntercepted = (state.totalIntercepted || 0) + 1;
      state.activeStreams[streamId] = meta;
      broadcast({ type: "sw-intercept-start", streamId, meta });
      const [clientStream, swStream] = upstream.body.tee();
      const saveTask = (async () => {
        const reader = swStream.getReader();
        const decoder = new TextDecoder("utf-8");
        let acc = "";
        let sinceBytes = 0;
        let lastSaveAt = 0;
        let lastBroadcastAt = 0;
        async function maybeFlush(force = false) {
          const nowMs = now();
          if (!force && sinceBytes < SAVE_BYTES_THRESHOLD && nowMs - lastSaveAt < SAVE_TIME_THRESHOLD) return;
          const res = await flushToLastThreadUsingLF(streamId, acc, { bytes: meta.bytes });
          lastSaveAt = nowMs;
          sinceBytes = 0;
          if (res.ok) {
            const now2 = Date.now();
            if (now2 - lastBroadcastAt > BROADCAST_THROTTLE_MS) {
              lastBroadcastAt = now2;
              broadcast({ type: "sw-intercept-progress", streamId, meta: { bytes: meta.bytes, savedAt: lastSaveAt, snippet: acc.slice(-1024), threadId: res.threadId, writeRes: res.writeRes } });
            }
          } else {
            broadcast({ type: "sw-intercept-error", streamId, meta: { error: res.error } });
          }
        }
        try {
          while (true) {
            const { value, done } = await reader.read();
            if (done) break;
            let chunk = "";
            try {
              chunk = decoder.decode(value, { stream: true });
            } catch (e) {
              chunk = "";
            }
            acc += chunk;
            const bytes = value ? value.byteLength || 0 : chunk.length;
            meta.bytes += bytes;
            sinceBytes += bytes;
            await maybeFlush(false);
          }
          await maybeFlush(true);
          meta.status = "finished";
          meta.endedAt = now();
          state.lastStream = { streamId, url: meta.url, startedAt: meta.startedAt, endedAt: meta.endedAt, totalBytes: meta.bytes };
          delete state.activeStreams[streamId];
          broadcast({ type: "sw-intercept-end", streamId, meta: { totalBytes: meta.bytes, endedAt: meta.endedAt } });
        } catch (err) {
          meta.status = "error";
          meta.error = String(err && err.message ? err.message : err);
          delete state.activeStreams[streamId];
          broadcast({ type: "sw-intercept-error", streamId, meta: { error: meta.error } });
        }
      })();
      event.waitUntil(saveTask);
      return new Response(clientStream, {
        status: upstream.status,
        statusText: upstream.statusText,
        headers: upstream.headers
      });
    })());
  } catch (err) {
    logDebug("fetch handler top-level error: " + (err && err.message ? err.message : String(err)));
  }
});
self.addEventListener("message", (event) => {
  const data = event.data || {};
  (async () => {
    try {
      if (data && data.type === "PING") {
        if (event.ports && event.ports[0]) event.ports[0].postMessage({ type: "PONG", ts: now(), ok: true });
        else broadcast({ type: "PONG", ts: now(), ok: true });
        return;
      }
      if (data && data.type === "PING_STATUS") {
        const reply = { type: "PONG_STATUS", ts: now(), lfAvailable, lfLoadError, totalIntercepted: state.totalIntercepted || 0, lastStream: state.lastStream || null };
        if (event.ports && event.ports[0]) event.ports[0].postMessage(reply);
        else broadcast(reply);
        return;
      }
      if (data && data.type === "TEST_WRITE") {
        if (!lfAvailable) {
          const res = { type: "TEST_WRITE_RESULT", ok: false, error: "localforage unavailable: " + lfLoadError };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
          else broadcast(res);
          return;
        }
        try {
          const threads = await readThreadsViaLocalForage();
          const tid = "sw-test-" + gid();
          const nowMs = now();
          const t = { id: tid, title: "SW test " + new Date(nowMs).toISOString(), pinned: false, updatedAt: nowMs, messages: [{ id: "swtest-" + gid(), role: "assistant", content: "sw test write @ " + new Date(nowMs).toISOString(), contentParts: [{ type: "text", text: "sw test write" }], createdAt: nowMs, updatedAt: nowMs }] };
          threads.unshift(t);
          const writeRes = await writeThreadsViaLocalForage(threads);
          const out = { type: "TEST_WRITE_RESULT", ok: true, tid, writeRes };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        } catch (err) {
          const out = { type: "TEST_WRITE_RESULT", ok: false, error: String(err && err.message ? err.message : err) };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        }
        return;
      }
      if (data && data.type === "READ_KEY") {
        const key = data.key || THREADS_KEY;
        if (!lfAvailable) {
          const res = { type: "READ_KEY_RESULT", ok: false, key, error: "localforage unavailable: " + lfLoadError };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
          else broadcast(res);
          return;
        }
        try {
          const val = await localforage.getItem(key);
          const parsed = typeof val === "string" ? (() => {
            try {
              return JSON.parse(val);
            } catch {
              return val;
            }
          })() : val;
          const out = { type: "READ_KEY_RESULT", ok: true, key, value: parsed };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        } catch (err) {
          const out = { type: "READ_KEY_RESULT", ok: false, key, error: String(err && err.message ? err.message : err) };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        }
        return;
      }
      if (data && data.type === "LIST_SW_SAVED") {
        if (!lfAvailable) {
          const res = { type: "LIST_SW_SAVED_RESULT", ok: false, error: "localforage unavailable: " + lfLoadError };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
          else broadcast(res);
          return;
        }
        try {
          const threads = await readThreadsViaLocalForage();
          const found = [];
          for (const t of threads || []) {
            for (const m of t.messages || []) {
              if (m && m.sw_streamId) found.push({ threadId: t.id, threadTitle: t.title, messageId: m.id, sw_streamId: m.sw_streamId, snippet: (m.content || "").slice(0, 200), updatedAt: m.updatedAt });
            }
          }
          const out = { type: "LIST_SW_SAVED_RESULT", ok: true, found };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        } catch (err) {
          const out = { type: "LIST_SW_SAVED_RESULT", ok: false, error: String(err && err.message ? err.message : err) };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        }
        return;
      }
      if (data && data.type === "CLEAR_TESTS") {
        if (!lfAvailable) {
          const res = { type: "CLEAR_TESTS_RESULT", ok: false, error: "localforage unavailable: " + lfLoadError };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
          else broadcast(res);
          return;
        }
        try {
          const threads = await readThreadsViaLocalForage();
          const before = threads.length;
          const cleaned = threads.filter((t) => !(t.id && String(t.id).startsWith("sw-test-")));
          await writeThreadsViaLocalForage(cleaned);
          const removed = before - cleaned.length;
          const out = { type: "CLEAR_TESTS_RESULT", ok: true, removed };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        } catch (err) {
          const out = { type: "CLEAR_TESTS_RESULT", ok: false, error: String(err && err.message ? err.message : err) };
          if (event.ports && event.ports[0]) event.ports[0].postMessage(out);
          else broadcast(out);
        }
        return;
      }
    } catch (err) {
      const r = { type: "SW_ERROR", error: String(err && err.message ? err.message : err) };
      if (event.ports && event.ports[0]) event.ports[0].postMessage(r);
      else broadcast(r);
    }
  })();
});