"""
End-to-end tests for the OpenAPI-first model CRUD example app.

These tests validate that all CRUD operations behave correctly
against the in-memory mock data store using Pydantic models.

The tests assume:
- OpenAPI-first route binding
- Pydantic model validation
- In-memory storage (no persistence guarantees)
- Deterministic behavior in a single process
"""

from fastapi.testclient import TestClient

from main import app


client = TestClient(app)


def test_list_items_initial():
    """Initial items should be present."""
    response = client.get("/items")
    assert response.status_code == 200

    data = response.json()
    assert isinstance(data, list)
    assert len(data) >= 2

    ids = {item["id"] for item in data}
    assert 1 in ids
    assert 2 in ids


def test_get_item():
    """Existing item should be retrievable by ID."""
    response = client.get("/items/1")
    assert response.status_code == 200

    item = response.json()
    assert item["id"] == 1
    assert isinstance(item["name"], str)
    assert isinstance(item["price"], float)


def test_create_item():
    """Creating a new item should return the created entity."""
    payload = {
        "name": "Orange",
        "price": 0.8,
    }

    response = client.post("/items", json=payload)
    assert response.status_code == 201

    item = response.json()
    assert "id" in item
    assert item["name"] == payload["name"]
    assert item["price"] == payload["price"]

    # Verify it appears in list
    list_response = client.get("/items")
    ids = {i["id"] for i in list_response.json()}
    assert item["id"] in ids


def test_update_item():
    """Updating an item should replace its values."""
    payload = {
        "name": "Green Apple",
        "price": 0.6,
    }

    response = client.put("/items/1", json=payload)
    assert response.status_code == 200

    item = response.json()
    assert item["id"] == 1
    assert item["name"] == payload["name"]
    assert item["price"] == payload["price"]

    # Verify persisted update
    get_response = client.get("/items/1")
    updated = get_response.json()
    assert updated["name"] == payload["name"]
    assert updated["price"] == payload["price"]


def test_delete_item():
    """Deleting an item should remove it from the store."""
    response = client.delete("/items/2")
    assert response.status_code == 204

    # Verify deletion
    list_response = client.get("/items")
    ids = {item["id"] for item in list_response.json()}
    assert 2 not in ids