from pathlib import Path

from fastapi.testclient import TestClient

from app.config import Settings
from app.main import create_app


def test_health_reports_degraded_when_realesrgan_binary_is_missing(tmp_path: Path) -> None:
    settings = Settings(
        engine="realesrgan-ncnn",
        device="vulkan",
        token="secret-token",
        tmp_dir=str(tmp_path / "tmp"),
        output_dir=str(tmp_path / "output"),
        realesrgan_bin=str(tmp_path / "bin" / "realesrgan-ncnn-vulkan"),
        realesrgan_model_dir=str(tmp_path / "models"),
    )
    (tmp_path / "models").mkdir(parents=True)

    client = TestClient(create_app(settings))
    response = client.get("/health")

    assert response.status_code == 200
    payload = response.json()
    assert payload["status"] == "degraded"
    assert payload["engine"] == "realesrgan-ncnn"
    assert payload["realesrgan"]["binary_exists"] is False
    assert payload["realesrgan"]["available_models"] == []


def test_health_reports_available_models_for_realesrgan(tmp_path: Path) -> None:
    binary = tmp_path / "bin" / "realesrgan-ncnn-vulkan"
    binary.parent.mkdir(parents=True)
    binary.write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
    binary.chmod(0o755)

    model_dir = tmp_path / "models"
    model_dir.mkdir(parents=True)
    for name in ("realesrgan-x4plus", "realesrgan-x4plus-anime"):
        (model_dir / f"{name}.param").write_text("param", encoding="utf-8")
        (model_dir / f"{name}.bin").write_text("bin", encoding="utf-8")

    settings = Settings(
        engine="realesrgan-ncnn",
        device="vulkan",
        token="secret-token",
        tmp_dir=str(tmp_path / "tmp"),
        output_dir=str(tmp_path / "output"),
        realesrgan_bin=str(binary),
        realesrgan_model_dir=str(model_dir),
    )

    client = TestClient(create_app(settings))
    response = client.get("/health")

    assert response.status_code == 200
    payload = response.json()
    assert payload["status"] == "ok"
    assert payload["models_loaded"] is True
    assert payload["realesrgan"]["available_models"] == ["realesrgan-x4plus", "realesrgan-x4plus-anime"]