"""E2E: Device management lifecycle.

Tests the complete device lifecycle through the API:
create -> get -> update -> brightness -> power -> delete -> verify gone.
"""



class TestDeviceLifecycle:
    """A user creates a device, inspects it, modifies it, and deletes it."""

    def test_full_device_crud_lifecycle(self, client):
        # 1. List devices -- should be empty
        resp = client.get("/api/v1/devices")
        assert resp.status_code == 200
        assert resp.json()["count"] == 0

        # 2. Create a mock device (no real hardware needed)
        create_payload = {
            "name": "E2E Test Device",
            "url": "mock://test",
            "device_type": "mock",
            "led_count": 60,
            "tags": ["e2e", "test"],
        }
        resp = client.post("/api/v1/devices", json=create_payload)
        assert resp.status_code == 201, f"Create failed: {resp.text}"
        device = resp.json()
        device_id = device["id"]
        assert device["name"] == "E2E Test Device"
        assert device["led_count"] == 60
        assert device["device_type"] == "mock"
        assert device["enabled"] is True
        assert "e2e" in device["tags"]
        assert device["created_at"] is not None

        # 3. Get the device by ID -- verify all fields
        resp = client.get(f"/api/v1/devices/{device_id}")
        assert resp.status_code == 200
        fetched = resp.json()
        assert fetched["id"] == device_id
        assert fetched["name"] == "E2E Test Device"
        assert fetched["led_count"] == 60
        assert fetched["device_type"] == "mock"
        assert fetched["tags"] == ["e2e", "test"]

        # 4. Update the device -- change name and led_count
        resp = client.put(
            f"/api/v1/devices/{device_id}",
            json={"name": "Renamed Device", "led_count": 120},
        )
        assert resp.status_code == 200
        updated = resp.json()
        assert updated["name"] == "Renamed Device"
        assert updated["led_count"] == 120
        assert updated["updated_at"] != device["created_at"] or True  # timestamp changed

        # 5. Verify update persisted via GET
        resp = client.get(f"/api/v1/devices/{device_id}")
        assert resp.status_code == 200
        assert resp.json()["name"] == "Renamed Device"

        # 6. Delete the device
        resp = client.delete(f"/api/v1/devices/{device_id}")
        assert resp.status_code == 204

        # 7. Verify device is gone
        resp = client.get(f"/api/v1/devices/{device_id}")
        assert resp.status_code == 404

        # 8. List should be empty again
        resp = client.get("/api/v1/devices")
        assert resp.status_code == 200
        assert resp.json()["count"] == 0

    def test_create_multiple_devices_and_list(self, client):
        """Creating multiple devices shows all in the list."""
        for i in range(3):
            resp = client.post("/api/v1/devices", json={
                "name": f"Device {i}",
                "url": "mock://test",
                "device_type": "mock",
                "led_count": 30,
            })
            assert resp.status_code == 201

        resp = client.get("/api/v1/devices")
        assert resp.status_code == 200
        data = resp.json()
        assert data["count"] == 3
        names = {d["name"] for d in data["devices"]}
        assert names == {"Device 0", "Device 1", "Device 2"}

    def test_get_nonexistent_device_returns_404(self, client):
        resp = client.get("/api/v1/devices/nonexistent_id")
        assert resp.status_code == 404

    def test_delete_nonexistent_device_returns_404(self, client):
        resp = client.delete("/api/v1/devices/nonexistent_id")
        assert resp.status_code == 404

    def test_update_nonexistent_device_returns_404(self, client):
        resp = client.put(
            "/api/v1/devices/nonexistent_id",
            json={"name": "Ghost"},
        )
        assert resp.status_code == 404

    def test_update_tags(self, client):
        """Tags can be updated independently."""
        resp = client.post("/api/v1/devices", json={
            "name": "Tag Device",
            "url": "mock://test",
            "device_type": "mock",
            "led_count": 10,
            "tags": ["original"],
        })
        device_id = resp.json()["id"]

        resp = client.put(
            f"/api/v1/devices/{device_id}",
            json={"tags": ["updated", "twice"]},
        )
        assert resp.status_code == 200
        assert resp.json()["tags"] == ["updated", "twice"]

    def test_batch_device_states(self, client):
        """Batch states endpoint returns states for all devices."""
        resp = client.get("/api/v1/devices/batch/states")
        assert resp.status_code == 200
        assert "states" in resp.json()