// Logic test for the realtime-sync frames: the D3 edit/delete pair
// (`message_edited` / `message_deleted`), the per-session message cache
// (裁决 16.4.5 — a frame is written into the bucket its own `sessionId` names, and
// switching sessions keeps the list instead of clearing it), the per-session flow
// graphs (裁决 16.4.2 — a backthink graph never overwrites the active session's),
// and the session read cursor (Android 协同 B3/D4 — the `session_read` frame clears
// exactly the conversation it names, and opening a session pushes its forward-only
// cursor). The project has no frontend test runner
// and no jsdom, so this is a dependency-free plain-node check: it drives the real
// frame decoder (`dispatchFrame` in lib/ws.ts), the real read path
// (`markSessionOpenedRead` in lib/sessionRead.ts, via lib/api) and the real store,
// and throws on the first failure.
//
// Run it with the esbuild that already ships with vite (no new dependency, no
// package.json change); the banner supplies the `window.localStorage` the store's
// persist middleware probes, which is simply absent under node:
//
//   cd frontend/web \
//     && ./node_modules/.bin/esbuild src/store/messageSync.test.ts \
//          --bundle --platform=node --format=esm \
//          --banner:js='globalThis.window={localStorage:{getItem:()=>null,setItem:()=>{},removeItem:()=>{}}};' \
//          --outfile=/tmp/cyrene-message-sync.test.mjs \
//     && node /tmp/cyrene-message-sync.test.mjs
//
// `tsc --noEmit` (part of `npm run build`) type-checks this file, which is why it
// imports nothing from node:*.

import { dispatchFrame } from "../lib/ws";
import { markSessionOpenedRead } from "../lib/sessionRead";
import { frameIsActive } from "../lib/ws/handlers/shared";
import { useAppStore } from "./useAppStore";
import { BACKTHINK_SESSION_ID } from "./sessionCache";
import type { ChatMessage, SessionMeta } from "../lib/types";

let checks = 0;

function ok(cond: boolean, what: string): void {
  checks += 1;
  if (!cond) throw new Error(`FAILED: ${what}`);
}

function same<T>(got: T, want: T, what: string): void {
  ok(JSON.stringify(got) === JSON.stringify(want), `${what} — got ${JSON.stringify(got)}, want ${JSON.stringify(want)}`);
}

const MAIN = "web";
const OTHER = "web:sub-1";

/** Reset the store to a focused session holding a fixed message list (and no
 *  buckets, so each case starts from a known cache state). */
function seed(messages: ChatMessage[], activeSessionId: string): void {
  useAppStore.setState({ activeSessionId, messages, sessionMessages: {} });
}

function messages(): ChatMessage[] {
  return useAppStore.getState().messages;
}

/** The cached message bucket of a session that is not on screen. */
function bucket(sessionId: string): ChatMessage[] {
  return useAppStore.getState().sessionMessages[sessionId] ?? [];
}

function base(): ChatMessage[] {
  return [
    { id: "m1", sessionId: MAIN, role: "user", content: "old", mode: "chat", createdAt: 1000 },
    { id: "m2", sessionId: MAIN, role: "assistant", content: "reply", createdAt: 2000 },
  ];
}

// ① Session filter: a frame scoped to another conversation never touches this one.
//    这是单槽全局状态（忙态 / 上下文 / 代审小字 / 回合结束的收口）共用的判据，
//    实现在 lib/ws/handlers/shared.ts。
ok(frameIsActive(MAIN, MAIN), "same session applies");
ok(!frameIsActive(OTHER, MAIN), "another session does not apply");
ok(frameIsActive(undefined, MAIN), "an unscoped (id-only) frame applies");
// 激活会话尚未解析（会话列表没回来）时沿用旧行为，不把主人正看着的流丢掉。
ok(frameIsActive(MAIN, ""), "an unresolved active session keeps the legacy behavior");

// ② message_edited patches the addressed bubble in place, by id, in the active
//    session — and leaves its siblings alone.
seed(base(), MAIN);
dispatchFrame({ type: "message_edited", sessionId: MAIN, data: { id: "m1", sessionId: MAIN, content: "new", mode: "chat", createdAt: 1000 } });
same(
  messages().map((m) => m.content),
  ["new", "reply"],
  "edit patches only the addressed message"
);
same(messages().find((m) => m.id === "m1")?.mode, "chat", "edit keeps the message mode");
ok(messages().find((m) => m.id === "m1")?.createdAt === 1000, "edit keeps createdAt");

// ③ An edit frame for another session is ignored (no cross-session write) …
seed(base(), MAIN);
dispatchFrame({ type: "message_edited", sessionId: OTHER, data: { id: "m3", sessionId: OTHER, content: "elsewhere" } });
same(messages().map((m) => m.content), ["old", "reply"], "edit for another session does not apply");

// … and an edit for an id we do not hold never appends a row.
seed(base(), MAIN);
dispatchFrame({ type: "message_edited", sessionId: MAIN, data: { id: "m-ghost", sessionId: MAIN, content: "ghost" } });
same(messages().length, 2, "edit for an unknown id does not append");

// A malformed frame (no content) must not blank out a rendered bubble.
seed(base(), MAIN);
dispatchFrame({ type: "message_edited", sessionId: MAIN, data: { id: "m1", sessionId: MAIN } });
same(messages()[0].content, "old", "content-less edit frame is dropped");

// ④ message_deleted removes the addressed bubble in the active session only.
seed(base(), MAIN);
dispatchFrame({ type: "message_deleted", sessionId: MAIN, data: { id: "m1" } });
same(messages().map((m) => m.id), ["m2"], "delete removes the addressed message");

// A delete frame for another session is ignored.
seed(base(), MAIN);
dispatchFrame({ type: "message_deleted", sessionId: OTHER, data: { id: "m1" } });
same(messages().map((m) => m.id), ["m1", "m2"], "delete for another session does not apply");

// An unscoped delete still applies (the id is globally unique, so it can only ever
// match its own message).
seed(base(), MAIN);
dispatchFrame({ type: "message_deleted", data: { id: "m2" } });
same(messages().map((m) => m.id), ["m1"], "unscoped delete applies by id");

// A delete for an id we do not hold is a no-op.
seed(base(), MAIN);
dispatchFrame({ type: "message_deleted", sessionId: MAIN, data: { id: "m-ghost" } });
same(messages().length, 2, "delete for an unknown id is a no-op");

// The store actions are also safe on their own (defensive: duplicate frames).
seed(base(), MAIN);
useAppStore.getState().updateMessageById("m-ghost", { content: "x" });
useAppStore.getState().removeMessageById("m-ghost");
same(messages().length, 2, "store id-actions no-op on an unknown id");

// ⑤ 会话级消息缓存（裁决 16.4.5 / design/16 §4.3）。hub 把每个会话的帧都广播给每条
//    连接，因此一帧要落到**它自己那个会话**：属于屏幕上这个会话就写当前列表，属于别的
//    会话就写它的消息桶（切过去即见），而不是被丢掉。只有单槽全局状态（忙态 / 上下文）
//    仍只认「屏幕上这个会话」。
function streaming(): ChatMessage[] {
  return [
    { id: "s1", sessionId: MAIN, role: "user", content: "hi", createdAt: 3000 },
    {
      id: "s2",
      sessionId: MAIN,
      role: "assistant",
      content: "partial",
      streaming: true,
      tools: [],
      createdAt: 4000,
    },
  ];
}

// A foreign delta never touches this bubble, and it does not invent a bubble in the
// other session's bucket either (a delta can only extend an assistant bubble that
// already exists there — the persisted row covers the rest).
seed(streaming(), MAIN);
dispatchFrame({ type: "message.delta", sessionId: OTHER, data: { delta: "LEAK", index: 0 } });
same(messages().map((m) => m.content), ["hi", "partial"], "delta for another session does not touch the active bubble");
same(bucket(OTHER), [], "a delta without a bubble in that session invents nothing");

// … but when the bucket already holds that turn's bubble — the common case, because
// switching away stashes the optimistic bubbles into it — the delta lands there and
// is on screen the moment the session is switched to.
seed(streaming(), MAIN);
useAppStore.setState({ sessionMessages: { [OTHER]: streaming() } });
dispatchFrame({ type: "message.delta", sessionId: OTHER, data: { delta: "+bg", index: 0 } });
same(bucket(OTHER)[1].content, "partial+bg", "a background turn keeps streaming into its own bucket");
same(messages()[1].content, "partial", "…and the active bubble stays untouched");
useAppStore.getState().setActiveSession(OTHER);
same(messages()[1].content, "partial+bg", "switching to the background session shows its live text");
useAppStore.getState().setActiveSession(MAIN);
same(messages().map((m) => m.content), ["hi", "partial"], "switching back restores the first session (nothing cleared)");

// A persisted message for another session is cached as well (never dropped).
seed(base(), MAIN);
dispatchFrame({
  type: "message_persisted",
  sessionId: OTHER,
  data: { message: { id: "m9", sessionId: OTHER, role: "assistant", content: "bg", createdAt: 5000 } },
});
same(bucket(OTHER).map((m) => m.content), ["bg"], "message_persisted for another session is cached in its bucket");
same(messages().length, 2, "…and leaves the active list alone");

// … the active session's delta is appended as before …
seed(streaming(), MAIN);
dispatchFrame({ type: "message.delta", sessionId: MAIN, data: { delta: " world", index: 0 } });
same(messages()[1].content, "partial world", "delta for the active session is appended");

// … a payload-carried sessionId is honored too …
seed(streaming(), MAIN);
dispatchFrame({ type: "message.delta", sessionId: OTHER, data: { sessionId: MAIN, delta: "!" } });
same(messages()[1].content, "partial!", "a payload sessionId overrides the envelope's");

// … and a frame with no sessionId at all keeps the pre-guard behavior.
seed(streaming(), MAIN);
dispatchFrame({ type: "message.delta", data: { delta: " old", index: 0 } });
same(messages()[1].content, "partial old", "an unscoped delta keeps the legacy behavior");

// Before the session list has resolved the active session the store still holds "",
// while the frames carry the main session: the text is filed under that session (not
// spliced into the unresolved list) and appears as soon as the list resolves.
seed(streaming(), "");
useAppStore.setState({ sessionMessages: { [MAIN]: streaming() } });
dispatchFrame({ type: "message.delta", sessionId: MAIN, data: { delta: " early", index: 0 } });
same(bucket(MAIN)[1].content, "partial early", "a delta before the active session resolves lands in the named session's bucket");
useAppStore.getState().setActiveSession(MAIN);
same(messages()[1].content, "partial early", "…and is on screen once the active session resolves");

// The legacy text channel (stream_chunk) is routed the same way.
seed(streaming(), MAIN);
dispatchFrame({ type: "stream_chunk", sessionId: OTHER, data: { delta: "LEAK" } });
same(messages()[1].content, "partial", "legacy stream_chunk for another session does not touch the active bubble");
seed(streaming(), MAIN);
dispatchFrame({ type: "stream_chunk", data: { delta: " tail" } });
same(messages()[1].content, "partial tail", "an unscoped stream_chunk keeps the legacy behavior");

// Thinking segments: the accumulator and the rendered block are per session, so a
// background turn's reasoning never lands in the block on screen.
seed(streaming(), MAIN);
dispatchFrame({ type: "thinking.start", sessionId: MAIN, data: { index: 0 } });
dispatchFrame({ type: "thinking.delta", sessionId: OTHER, data: { delta: "other-thought", index: 0 } });
ok(messages()[1].thinking === undefined, "thinking.delta for another session does not touch this bubble");
dispatchFrame({ type: "thinking.delta", sessionId: MAIN, data: { delta: "mine", index: 0 } });
same(messages()[1].thinking, "mine", "thinking.delta for the active session accumulates");
dispatchFrame({ type: "thinking.end", sessionId: OTHER, data: { index: 0 } });
same(messages()[1].thinking, "mine", "thinking.end for another session leaves the block alone");
dispatchFrame({ type: "thinking.end", sessionId: MAIN, data: { index: 0 } });
same(messages()[1].thinking, "mine", "thinking.end for the active session keeps the text");

// Tool cards land on the last assistant message of their own session too.
seed(streaming(), MAIN);
dispatchFrame({ type: "tool_call.start", sessionId: OTHER, data: { id: "toolu_1", name: "web_search" } });
same(messages()[1].tools, [], "tool_call.start for another session adds no card here");
same(bucket(OTHER), [], "…and invents no bucket for it");
dispatchFrame({ type: "tool_call.start", sessionId: MAIN, data: { id: "toolu_1", name: "web_search" } });
same(
  (messages()[1].tools ?? []).map((t) => t.name),
  ["web_search"],
  "tool_call.start for the active session adds the card"
);
seed(streaming(), MAIN);
dispatchFrame({ type: "tool_used", sessionId: OTHER, data: { name: "shell" } });
same(messages()[1].tools, [], "legacy tool_used for another session adds no card here");

// stream_end carries single-slot state (the streaming flag + the busy badge), so
// another session finishing its turn must not close this one — it only closes its
// own bubble, in its own bucket.
seed(streaming(), MAIN);
useAppStore.setState({ sessionBusy: true, pendingCount: 2, sessionMessages: { [OTHER]: streaming() } });
dispatchFrame({ type: "stream_end", sessionId: OTHER, data: { stopReason: "end_turn" } });
ok(messages()[1].streaming === true, "a foreign stream_end does not close the active bubble");
ok(bucket(OTHER)[1].streaming === false, "…it closes that turn's bubble in its own bucket");
ok(useAppStore.getState().sessionBusy === true, "a foreign stream_end does not clear the busy badge");
same(useAppStore.getState().pendingCount, 2, "a foreign stream_end does not clear the pending count");

seed(streaming(), MAIN);
useAppStore.setState({ sessionBusy: true, pendingCount: 2 });
dispatchFrame({ type: "stream_end", sessionId: MAIN, data: { stopReason: "end_turn" } });
ok(messages()[1].streaming === false, "the active session's stream_end closes the bubble");
ok(useAppStore.getState().sessionBusy === false, "the active session's stream_end clears busy");
same(useAppStore.getState().pendingCount, 0, "the active session's stream_end clears the pending count");

seed(streaming(), MAIN);
dispatchFrame({ type: "stream_end", data: { stopReason: "end_turn" } });
ok(messages()[1].streaming === false, "an unscoped stream_end keeps the legacy behavior");

// ⑥ Unread badges / read cursor (Android 协同 B3/D4). The session list carries a
//    per-session `unreadCount`; `session_read` is the frame another end emits after
//    it marked a conversation read, and it must clear exactly that conversation.
function seedSessions(list: SessionMeta[]): void {
  useAppStore.setState({
    sessions: Object.fromEntries(list.map((s) => [s.id, s])),
    activeSessionId: MAIN,
  });
}

function unreadOf(id: string): number | undefined {
  return useAppStore.getState().sessions[id]?.unreadCount;
}

function twoUnread(): SessionMeta[] {
  return [
    { id: MAIN, type: "main", createdAt: 1, unreadCount: 3 },
    { id: OTHER, type: "sub", createdAt: 2, unreadCount: 5 },
  ];
}

// A frame naming another session clears that session — and only that session: the
// conversation on screen keeps the dot that belongs to it.
seedSessions(twoUnread());
dispatchFrame({ type: "session_read", sessionId: OTHER, data: { readAt: 100 } });
same(unreadOf(OTHER), 0, "session_read for another session clears that session's dot");
same(unreadOf(MAIN), 3, "session_read for another session leaves the active dot alone");

// A frame naming the active session clears it.
seedSessions(twoUnread());
dispatchFrame({ type: "session_read", sessionId: MAIN, data: { readAt: 200 } });
same(unreadOf(MAIN), 0, "session_read for the active session clears its dot");
same(unreadOf(OTHER), 5, "session_read for the active session leaves the other dot alone");

// A payload-carried sessionId wins (the envelope may be bare) …
seedSessions(twoUnread());
dispatchFrame({ type: "session_read", data: { sessionId: MAIN, readAt: 300 } });
same(unreadOf(MAIN), 0, "a payload sessionId is honored");
same(unreadOf(OTHER), 5, "a payload sessionId still scopes to one session");

// … an unattributable frame (no session id anywhere) touches nothing rather than
// guessing whose badge to clear …
seedSessions(twoUnread());
dispatchFrame({ type: "session_read", data: { readAt: 400 } });
same(unreadOf(MAIN), 3, "an unattributable session_read clears no active dot");
same(unreadOf(OTHER), 5, "an unattributable session_read clears no other dot");

// … and an unknown session id is a no-op: no row is invented, nothing is cleared.
seedSessions(twoUnread());
dispatchFrame({ type: "session_read", sessionId: "web:ghost", data: { readAt: 500 } });
ok(
  !("web:ghost" in useAppStore.getState().sessions),
  "a session_read for an unknown session invents no row"
);
same(unreadOf(MAIN), 3, "a session_read for an unknown session clears nothing");

// A session the backend did not annotate (older backend, no `unreadCount`) has
// nothing to clear — the frame leaves the entry exactly as it was rather than
// writing a 0 the backend never reported. The badge reads absent as 0.
seedSessions([{ id: MAIN, type: "main", createdAt: 1 }]);
dispatchFrame({ type: "session_read", sessionId: MAIN, data: { readAt: 600 } });
ok(unreadOf(MAIN) === undefined, "a session without unreadCount is left unannotated");

// ⑦ The open-a-session trigger. `markSessionOpenedRead` (fired once the history
//    page has landed) zeroes the badge locally and pushes the forward-only cursor;
//    a session already reading as read must not produce a request on every switch.
//    The REST layer is exercised for real — only `fetch` is stubbed.
const calls: { url: string; method?: string; body?: unknown }[] = [];
const originalFetch = globalThis.fetch;
const originalLocalStorage = globalThis.localStorage;
// The bundle's banner supplies `window.localStorage` (the store's persist
// middleware probes it); the REST layer reads the bare `localStorage` global,
// which node does not expose without --experimental-webstorage.
globalThis.localStorage = window.localStorage;
globalThis.fetch = ((url: RequestInfo | URL, init?: RequestInit) => {
  calls.push({ url: String(url), method: init?.method, body: init?.body });
  return Promise.resolve({
    ok: true,
    status: 200,
    json: async () => ({ data: { sessionId: MAIN, readAt: 1 } }),
  } as unknown as Response);
}) as typeof fetch;

seedSessions([{ id: MAIN, type: "main", createdAt: 1, unreadCount: 4 }]);
markSessionOpenedRead(MAIN);
same(unreadOf(MAIN), 0, "opening an unread session clears its badge immediately");
same(calls.length, 1, "opening an unread session sends exactly one read call");
same(calls[0].url, "/api/v1/sessions/web/read", "the read call targets the read endpoint");
same(calls[0].method, "POST", "the read call is a POST");
same(calls[0].body, "{}", "an omitted `before` sends an empty body, meaning now");

// Re-opening a session that already reads as read sends nothing.
markSessionOpenedRead(MAIN);
same(calls.length, 1, "an already-read session sends no further read call");
// Same for an unknown session id and for an empty one.
markSessionOpenedRead("web:ghost");
markSessionOpenedRead("");
same(calls.length, 1, "an unknown or empty session sends no read call");

// A stale open (the session was switched away and its metadata is gone) is a
// no-op too — the await'd page can resolve after the list was replaced.
seedSessions([]);
markSessionOpenedRead(MAIN);
same(calls.length, 1, "a missing session metadata entry sends no read call");

globalThis.fetch = originalFetch;
globalThis.localStorage = originalLocalStorage;

// ⑦ 会话级链路图（裁决 16.4.2）。`graph_update` 快照按它自己的 sessionId 入桶：
//    后台思考的图不会顶掉管理端 Flow / Agents 页正在看的「当前会话」图，管理后台
//    因此能同时拿到每一路（用户会话 / 后台思考）的完整链路。
seed([], MAIN);
dispatchFrame({
  type: "graph_update",
  data: { id: "web-1", nodes: [], edges: [], sessionId: MAIN },
});
dispatchFrame({
  type: "graph_update",
  data: { id: "sess-backthink-1", nodes: [], edges: [], sessionId: BACKTHINK_SESSION_ID },
});
same(
  useAppStore.getState().flowGraphs[MAIN]?.id,
  "web-1",
  "a graph is stored under its own sessionId"
);
same(
  useAppStore.getState().flowGraphs[BACKTHINK_SESSION_ID]?.id,
  "sess-backthink-1",
  "the backthink graph lives in its own bucket"
);
same(
  useAppStore.getState().flowGraph?.id,
  "web-1",
  "the compatibility alias stays on the active session (a backthink graph never takes it over)"
);

// A graph without a sessionId (legacy/unscoped frame) falls back to the active session.
seed([], MAIN);
dispatchFrame({ type: "graph_update", data: { id: "bare-1", nodes: [], edges: [] } });
same(
  useAppStore.getState().flowGraphs[MAIN]?.id,
  "bare-1",
  "an unscoped graph falls back to the active session"
);

console.log(`message sync logic test: ${checks} checks passed`);