"""Web 面板测试：HTTP/SSE 端点的集成路径（confirm approve/reject 经端点走通）。

- confirm approve / reject 流程经 HTTP 端点裁决；
- undo_session / 快照管理端点；
- SSE 事件流（用真实 uvicorn 起服务走 TCP，TestClient 会缓冲无限流）；
- EventBroker 单元测试。
本模块依赖可选 extra ``core[webui]``，未安装时整模块 skip。
"""
import http.client
import json
import socket
import threading
import time

import pytest

fastapi = pytest.importorskip("fastapi")
import uvicorn  # noqa: E402
from fastapi.testclient import TestClient  # noqa: E402

from mock_host import MockHostAdapter  # noqa: E402
from mock_llm import MockProvider  # noqa: E402
from quercus_core.providers.base import AssistantTurn, ToolCall  # noqa: E402
from quercus_core.types import Action  # noqa: E402
from quercus_core.webui.app import create_app  # noqa: E402
from quercus_core.webui.broker import EventBroker  # noqa: E402


def _wait_pending(client, timeout=5.0):
    deadline = time.time() + timeout
    while time.time() < deadline:
        data = client.get("/api/pending").json()
        if data["pending"]:
            return data["pending"][0]
        time.sleep(0.02)
    return None


# ---- 基础端点 ----

def test_index_served():
    app = create_app(adapter=MockHostAdapter(), provider=MockProvider(script=[]))
    client = TestClient(app)
    r = client.get("/")
    assert r.status_code == 200
    assert "<html" in r.text


def test_status_endpoint():
    app = create_app(adapter=MockHostAdapter(), provider=MockProvider(script=[]))
    client = TestClient(app)
    data = client.get("/api/status").json()
    assert data["ready"] is True


# ---- confirm approve / reject（必须的验收路径） ----

def test_confirm_approve_flow():
    adapter = MockHostAdapter()
    provider = MockProvider(
        script=[
            AssistantTurn(
                text="",
                tool_calls=(ToolCall(id="c1", name="import_footage", arguments={"paths": ["/media/a.mp4"]}),),
            ),
            AssistantTurn(text="导入完成", tool_calls=()),
        ]
    )
    app = create_app(adapter=adapter, provider=provider, confirm_timeout=10)
    client = TestClient(app)
    assert client.post("/api/chat", json={"text": "导入素材 a"}).json()["ok"] is True

    batch = _wait_pending(client)
    assert batch is not None
    assert batch["actions"][0]["tool"] == "import_footage"

    r = client.post(f"/api/confirm/{batch['batch_id']}", json={"approved": True})
    assert r.status_code == 200 and r.json()["ok"] is True
    assert app.state.session.wait_done(10)
    assert len(adapter.list_footage()) == 1  # 确认后变更已执行


def test_confirm_reject_flow():
    adapter = MockHostAdapter()
    provider = MockProvider(
        script=[
            AssistantTurn(
                text="",
                tool_calls=(ToolCall(id="c1", name="import_footage", arguments={"paths": ["/media/a.mp4"]}),),
            ),
            AssistantTurn(text="已取消", tool_calls=()),
        ]
    )
    app = create_app(adapter=adapter, provider=provider, confirm_timeout=10)
    client = TestClient(app)
    client.post("/api/chat", json={"text": "导入素材"})
    batch = _wait_pending(client)
    assert batch is not None

    r = client.post(f"/api/confirm/{batch['batch_id']}", json={"approved": False})
    assert r.json()["ok"] is True
    assert app.state.session.wait_done(10)
    assert adapter.list_footage() == []  # 拒绝后未执行


def test_confirm_unknown_batch_rejected():
    app = create_app(adapter=MockHostAdapter(), provider=MockProvider(script=[]))
    client = TestClient(app)
    r = client.post("/api/confirm/no_such_batch", json={"approved": True})
    assert r.json()["ok"] is False


def test_chat_busy_guard():
    """上一轮对话（待确认阻塞中）未结束前，拒绝新的发消息请求。"""
    provider = MockProvider(
        script=[AssistantTurn(text="", tool_calls=(ToolCall(id="c1", name="import_footage", arguments={"paths": ["/media/a.mp4"]}),))]
    )
    app = create_app(adapter=MockHostAdapter(), provider=provider, confirm_timeout=30)
    client = TestClient(app)
    assert client.post("/api/chat", json={"text": "第一条"}).json()["ok"] is True
    assert _wait_pending(client) is not None  # 会话被待确认阻塞
    r = client.post("/api/chat", json={"text": "第二条"})
    assert r.json()["ok"] is False
    assert "进行" in r.json()["reason"]


# ---- undo_session / 快照管理端点 ----

def test_undo_session_endpoint():
    adapter = MockHostAdapter()
    app = create_app(adapter=adapter, provider=MockProvider(script=[]))
    client = TestClient(app)
    app.state.session.executor.execute(Action(tool="import_footage", params={"paths": ["/media/a.mp4"]}))
    r = client.post("/api/undo_session")
    data = r.json()
    assert data["ok"] is True and data["restored"] >= 1
    assert adapter.list_footage() == []  # 时间线/媒体恢复原状


def test_snapshot_endpoints():
    adapter = MockHostAdapter()
    app = create_app(adapter=adapter, provider=MockProvider(script=[]))
    client = TestClient(app)
    app.state.session.executor.execute(Action(tool="import_footage", params={"paths": ["/media/a.mp4"]}))
    snaps = client.get("/api/snapshots").json()["snapshots"]
    assert len(snaps) >= 1
    sid = snaps[0]["id"]
    assert client.post(f"/api/snapshots/{sid}/drop").json()["ok"] is True
    assert client.get("/api/snapshots").json()["snapshots"] == []


# ---- EventBroker 单元 ----

def test_event_broker():
    broker = EventBroker()
    q1 = broker.subscribe()
    q2 = broker.subscribe()
    broker.publish({"kind": "system", "text": "hi"})
    assert q1.get(timeout=1)["text"] == "hi"
    assert q2.get(timeout=1)["text"] == "hi"
    broker.unsubscribe(q1)
    assert broker.subscriber_count == 1


# ---- SSE 事件流（真实 uvicorn 走 TCP） ----

@pytest.fixture
def live_server():
    adapter = MockHostAdapter()
    app = create_app(adapter=adapter, provider=MockProvider(script=[]))
    with socket.socket() as s:
        s.bind(("127.0.0.1", 0))
        port = s.getsockname()[1]
    config = uvicorn.Config(app, host="127.0.0.1", port=port, log_level="error")
    server = uvicorn.Server(config)
    thread = threading.Thread(target=server.run, daemon=True)
    thread.start()
    deadline = time.time() + 5
    while time.time() < deadline:
        try:
            with socket.create_connection(("127.0.0.1", port), timeout=0.2):
                break
        except OSError:
            time.sleep(0.05)
    else:
        pytest.fail("uvicorn 未在超时内就绪")
    yield {"app": app, "port": port}
    server.should_exit = True
    thread.join(timeout=5)


def test_sse_stream_delivers_events(live_server):
    port = live_server["port"]
    conn = http.client.HTTPConnection("127.0.0.1", port, timeout=10)
    try:
        conn.request("GET", "/api/events")
        resp = conn.getresponse()
        assert resp.status == 200
        assert resp.getheader("content-type", "").startswith("text/event-stream")
        first = resp.readline()
        assert b"connected" in first  # 首条事件确认流已就绪

        # 发布一条真实事件（undo_session 会发 system 消息）
        live_server["app"].state.session.undo_session()
        got = None
        deadline = time.time() + 5
        while time.time() < deadline:
            line = resp.readline()
            if not line:
                break
            if line.startswith(b"data: "):
                got = json.loads(line[6:])
                break
        assert got is not None
        assert got["kind"] == "system"
    finally:
        conn.close()