from __future__ import annotations


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_list_chats_cursor_paginates_without_duplicates(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)

    chat_ids = []
    for idx in range(5):
        cid = _create_chat(sofiia_client, "sofiia", "NODA2", f"pag-chats-{idx}")
        chat_ids.append(cid)
        r = sofiia_client.post(
            f"/api/chats/{cid}/send",
            json={"text": f"touch-{idx}", "idempotency_key": f"touch-{idx}"},
        )
        assert r.status_code == 200, r.text

    p1 = sofiia_client.get("/api/chats?nodes=NODA2&limit=2")
    assert p1.status_code == 200, p1.text
    j1 = p1.json()
    assert j1["count"] == 2
    assert j1["has_more"] is True
    assert j1["next_cursor"]

    p2 = sofiia_client.get(f"/api/chats?nodes=NODA2&limit=2&cursor={j1['next_cursor']}")
    assert p2.status_code == 200, p2.text
    j2 = p2.json()
    assert j2["count"] >= 1
    ids1 = {x["chat_id"] for x in j1["items"]}
    ids2 = {x["chat_id"] for x in j2["items"]}
    assert ids1.isdisjoint(ids2)


def test_list_messages_cursor_paginates_without_duplicates(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)
    cid = _create_chat(sofiia_client, "sofiia", "NODA2", "pag-messages")
    for idx in range(4):
        r = sofiia_client.post(
            f"/api/chats/{cid}/send",
            json={"text": f"msg-{idx}", "idempotency_key": f"msg-{idx}"},
        )
        assert r.status_code == 200, r.text

    p1 = sofiia_client.get(f"/api/chats/{cid}/messages?limit=2")
    assert p1.status_code == 200, p1.text
    j1 = p1.json()
    assert j1["count"] == 2
    assert j1["has_more"] is True
    assert j1["next_cursor"]

    p2 = sofiia_client.get(f"/api/chats/{cid}/messages?limit=2&cursor={j1['next_cursor']}")
    assert p2.status_code == 200, p2.text
    j2 = p2.json()
    assert j2["count"] >= 1
    ids1 = {x["message_id"] for x in j1["items"]}
    ids2 = {x["message_id"] for x in j2["items"]}
    assert ids1.isdisjoint(ids2)