from fastapi.testclient import TestClient

from config import get_settings
from main import app

client = TestClient(app)


def test_cors_headers():
    """Tests that CORS is set."""
    response = client.options(
        "/",
        headers={
            "Origin": "http://localhost:5173",
            "Access-Control-Request-Method": "GET"
        }
    )
    assert "access-control-allow-origin" in response.headers


def test_settings_injection():
    """Tests that the settings are available."""
    settings = get_settings()
    assert settings is not None
    assert hasattr(settings, "cors_origins")


def test_bread_proportions():
    """Tests the /calculate endpoint returns correct structure."""
    response = client.post(
        "/calculate",
        json={
            "total_flour": 500,
            "hydration": 70,
            "sourdough_percentage": 20,
            "sourdough_ratio": {
                "flour_parts": 1,
                "water_parts": 1
            },
            "salt": 2
        }
    )
    assert response.status_code == 200
    data = response.json()

    # Check main structure
    assert "ingredients_to_add" in data
    assert "details" in data

    # Check ingredients_to_add fields
    ingredients = data["ingredients_to_add"]
    assert "flour" in ingredients
    assert "water" in ingredients
    assert "sourdough" in ingredients
    assert "salt" in ingredients


def test_bread_proportions_values():
    """Tests the calculated values are correct."""
    response = client.post(
        "/calculate",
        json={
            "total_flour": 1000,
            "hydration": 70,
            "sourdough_percentage": 20,
            "sourdough_ratio": {
                "flour_parts": 1,
                "water_parts": 1
            },
            "salt": 2
        }
    )
    assert response.status_code == 200
    data = response.json()

    ingredients = data["ingredients_to_add"]
    details = data["details"]

    # Test calculated values
    assert ingredients["flour"] == 900.0      # 1000 - 100 (flour in sourdough)
    assert ingredients["water"] == 600.0      # 700 - 100 (water in sourdough)
    assert ingredients["sourdough"] == 200.0  # 1000 * 20%
    assert ingredients["salt"] == 20.0        # 1000 * 2%

    # Test details
    assert details["total_flour"] == 1000
    assert details["total_water"] == 700.0    # 1000 * 70%
    assert details["flour_in_sourdough"] == 100.0
    assert details["water_in_sourdough"] == 100.0


def test_validation_hydration_too_high():
    """Tests that validation rejects hydration > 100%."""
    response = client.post(
        "/calculate",
        json={
            "total_flour": 500,
            "hydration": 150,  # ❌ Too high
            "sourdough_percentage": 20,
            "sourdough_ratio": {
                "flour_parts": 1,
                "water_parts": 1
            },
            "salt": 2
        }
    )
    assert response.status_code == 422  # Validation error


def test_validation_negative_flour():
    """Tests that validation rejects negative flour."""
    response = client.post(
        "/calculate",
        json={
            "total_flour": -500,  # ❌ Negative
            "hydration": 70,
            "sourdough_percentage": 20,
            "sourdough_ratio": {
                "flour_parts": 1,
                "water_parts": 1
            },
            "salt": 2
        }
    )
    assert response.status_code == 422  # Validation error