from __future__ import annotations

from app.rate_limit import InMemoryRateLimiter


def _create_chat(client, agent_id: str, node_id: str, ref: str) -> str:
    r = client.post(
        "/api/chats",
        json={
            "agent_id": agent_id,
            "node_id": node_id,
            "source": "web",
            "external_chat_ref": ref,
        },
    )
    assert r.status_code == 200, r.text
    return r.json()["chat"]["chat_id"]


def test_inmemory_rate_limiter_blocks_burst_exceed():
    rl = InMemoryRateLimiter()
    first = rl.consume("rl:test:key", rps=0.001, burst=1)
    second = rl.consume("rl:test:key", rps=0.001, burst=1)

    assert first.allowed is True
    assert second.allowed is False
    assert second.retry_after_s > 0


def test_send_rate_limit_per_chat_returns_429(sofiia_client, sofiia_module, monkeypatch):
    async def _fake_infer(base_url, agent_id, text, **kwargs):
        return {"response": f"ok:{agent_id}:{text}", "backend": "fake", "model": "fake-model"}

    monkeypatch.setattr(sofiia_module, "infer", _fake_infer)
    monkeypatch.setattr(sofiia_module, "_rate_limiter", InMemoryRateLimiter())
    monkeypatch.setattr(sofiia_module, "_RL_CHAT_RPS", 0.001)
    monkeypatch.setattr(sofiia_module, "_RL_CHAT_BURST", 1)
    monkeypatch.setattr(sofiia_module, "_RL_OP_RPS", 100.0)
    monkeypatch.setattr(sofiia_module, "_RL_OP_BURST", 100)

    chat_id = _create_chat(sofiia_client, "sofiia", "NODA2", "rl-chat")
    r1 = sofiia_client.post(f"/api/chats/{chat_id}/send", json={"text": "ping-1", "user_id": "op-1"})
    r2 = sofiia_client.post(f"/api/chats/{chat_id}/send", json={"text": "ping-2", "user_id": "op-1"})

    assert r1.status_code == 200, r1.text
    assert r2.status_code == 429, r2.text
    body = r2.json()
    assert body["detail"]["error"]["code"] == "rate_limited"
    assert body["detail"]["error"]["scope"] == "chat"
    assert int(r2.headers.get("Retry-After", "0")) >= 1


def test_send_rate_limit_per_operator_returns_429(sofiia_client, sofiia_module, monkeypatch):
    async def _fake_infer(base_url, agent_id, text, **kwargs):
        return {"response": f"ok:{agent_id}:{text}", "backend": "fake", "model": "fake-model"}

    monkeypatch.setattr(sofiia_module, "infer", _fake_infer)
    monkeypatch.setattr(sofiia_module, "_rate_limiter", InMemoryRateLimiter())
    monkeypatch.setattr(sofiia_module, "_RL_CHAT_RPS", 100.0)
    monkeypatch.setattr(sofiia_module, "_RL_CHAT_BURST", 100)
    monkeypatch.setattr(sofiia_module, "_RL_OP_RPS", 0.001)
    monkeypatch.setattr(sofiia_module, "_RL_OP_BURST", 1)

    chat_1 = _create_chat(sofiia_client, "sofiia", "NODA2", "rl-op-1")
    chat_2 = _create_chat(sofiia_client, "sofiia", "NODA2", "rl-op-2")
    r1 = sofiia_client.post(f"/api/chats/{chat_1}/send", json={"text": "ping-1", "user_id": "operator-1"})
    r2 = sofiia_client.post(f"/api/chats/{chat_2}/send", json={"text": "ping-2", "user_id": "operator-1"})

    assert r1.status_code == 200, r1.text
    assert r2.status_code == 429, r2.text
    body = r2.json()
    assert body["detail"]["error"]["code"] == "rate_limited"
    assert body["detail"]["error"]["scope"] == "operator"
    assert int(r2.headers.get("Retry-After", "0")) >= 1