"""Tests pour le endpoint /health du viewer Flask."""

import json
import os
from unittest.mock import patch, MagicMock

import pytest
import requests

from src.viewer.app import create_app


@pytest.fixture
def app():
    with patch.dict(os.environ, {"T2A_DEMO_USER": "", "T2A_DEMO_PASS": ""}):
        app = create_app()
        app.config["TESTING"] = True
        yield app


@pytest.fixture
def client(app):
    return app.test_client()


class TestHealthEndpoint:

    def test_health_returns_200(self, client):
        response = client.get("/health")
        assert response.status_code == 200

    def test_health_returns_json(self, client):
        response = client.get("/health")
        data = response.get_json()
        assert data is not None
        assert data["status"] == "ok"

    def test_health_contains_required_fields(self, client):
        response = client.get("/health")
        data = response.get_json()
        assert "status" in data
        assert "version" in data
        assert "ollama" in data
        assert "timestamp" in data

    def test_health_version_format(self, client):
        response = client.get("/health")
        data = response.get_json()
        assert data["version"] == "2.1.0"

    def test_health_timestamp_is_iso(self, client):
        from datetime import datetime
        response = client.get("/health")
        data = response.get_json()
        # Should parse without error
        ts = datetime.fromisoformat(data["timestamp"])
        assert ts is not None

    @patch("src.viewer.app.requests.get")
    def test_health_ollama_reachable(self, mock_get, client):
        """Quand Ollama répond, ollama=True."""
        mock_resp = MagicMock()
        mock_resp.status_code = 200
        mock_get.return_value = mock_resp
        response = client.get("/health")
        data = response.get_json()
        assert data["ollama"] is True

    @patch("src.viewer.app.requests.get", side_effect=requests.ConnectionError("refused"))
    def test_health_ollama_unreachable(self, mock_get, client):
        """Quand Ollama est injoignable, ollama=False."""
        response = client.get("/health")
        data = response.get_json()
        assert data["ollama"] is False

    def test_health_ollama_is_bool(self, client):
        response = client.get("/health")
        data = response.get_json()
        assert isinstance(data["ollama"], bool)