"""API tests against a temp SQLite DB, exercising import -> list -> diff over the golden pair."""

from __future__ import annotations

import json
from pathlib import Path

import pytest

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

from ams.api.app import create_app  # noqa: E402

SNAP_DIR = Path(__file__).resolve().parents[1] / "snapshots"
PIKLIB = SNAP_DIR / "PIKLIB8.dll.snapshot.json"
BLOOMOO = SNAP_DIR / "bloomoodll.dll.snapshot.json"

pytestmark = pytest.mark.skipif(not PIKLIB.exists(), reason="golden snapshots not present")


@pytest.fixture()
def client(tmp_path) -> TestClient:
    app = create_app(database_url="sqlite:///{0}/api.db".format(tmp_path))
    return TestClient(app)


def _load(path: Path) -> dict:
    with open(path, "r", encoding="utf-8") as fh:
        return json.load(fh)


def test_health(client: TestClient):
    assert client.get("/health").json()["status"] == "ok"


def test_import_list_and_dedup(client: TestClient):
    r = client.post("/snapshots", params={"game": "Reksio i UFO"}, json=_load(PIKLIB))
    assert r.status_code == 201
    first_id = r.json()["id"]
    assert r.json()["engine"] == "Piklib" and r.json()["n_types"] == 40

    # re-importing the same binary (same sha256) updates in place, not a duplicate row
    r2 = client.post("/snapshots", json=_load(PIKLIB))
    assert r2.json()["id"] == first_id
    assert len(client.get("/snapshots").json()) == 1

    # the game was auto-created and linked
    games = client.get("/games").json()
    assert [g["name"] for g in games] == ["Reksio i UFO"]


def test_invalid_snapshot_rejected(client: TestClient):
    assert client.post("/snapshots", json={"not": "a snapshot"}).status_code == 422


def test_diff_endpoint(client: TestClient):
    a = client.post("/snapshots", params={"game": "Reksio i UFO"}, json=_load(PIKLIB)).json()["id"]
    b = client.post("/snapshots", params={"game": "Reksio i Kapitan Nemo"}, json=_load(BLOOMOO)).json()["id"]

    diff = client.get("/diff", params={"old": a, "new": b}).json()
    added = {t["script_name"] for t in diff["types"]["added"]}
    assert {"GRBUFFER", "INTERNET"} <= added

    animo = client.get("/diff", params={"old": a, "new": b, "owner": "CMC_Animo"}).json()
    assert "GETFPS" in {m["name"] for m in animo["methods"]["added"]}


def test_diff_missing_snapshot_404(client: TestClient):
    assert client.get("/diff", params={"old": 999, "new": 998}).status_code == 404