from uuid import uuid4

from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

from config.database import Base
from main import app
from routes import (
    consumption,
    costs,
    distributions,
    equipment,
    maintenance,
    parameters,
    production,
    reporting,
    scenarios,
    simulations,
    ui,
)

SQLALCHEMY_DATABASE_URL = "sqlite:///./test.db"
engine = create_engine(SQLALCHEMY_DATABASE_URL, connect_args={
                       "check_same_thread": False})
TestingSessionLocal = sessionmaker(
    autocommit=False, autoflush=False, bind=engine)


def setup_module(module):
    Base.metadata.create_all(bind=engine)


def teardown_module(module):
    Base.metadata.drop_all(bind=engine)


def override_get_db():
    db = TestingSessionLocal()
    try:
        yield db
    finally:
        db.close()


app.dependency_overrides[maintenance.get_db] = override_get_db
app.dependency_overrides[equipment.get_db] = override_get_db
app.dependency_overrides[scenarios.get_db] = override_get_db
app.dependency_overrides[distributions.get_db] = override_get_db
app.dependency_overrides[parameters.get_db] = override_get_db
app.dependency_overrides[costs.get_db] = override_get_db
app.dependency_overrides[consumption.get_db] = override_get_db
app.dependency_overrides[production.get_db] = override_get_db
app.dependency_overrides[reporting.get_db] = override_get_db
app.dependency_overrides[simulations.get_db] = override_get_db

app.include_router(maintenance.router)
app.include_router(equipment.router)
app.include_router(scenarios.router)
app.include_router(distributions.router)
app.include_router(ui.router)
app.include_router(parameters.router)
app.include_router(costs.router)
app.include_router(consumption.router)
app.include_router(production.router)
app.include_router(reporting.router)
app.include_router(simulations.router)

client = TestClient(app)


def _create_scenario_and_equipment():
    scenario_payload = {
        "name": f"Test Scenario {uuid4()}",
        "description": "Scenario for maintenance tests",
    }
    scenario_response = client.post("/api/scenarios/", json=scenario_payload)
    assert scenario_response.status_code == 200
    scenario_id = scenario_response.json()["id"]

    equipment_payload = {
        "scenario_id": scenario_id,
        "name": f"Test Equipment {uuid4()}",
        "description": "Equipment linked to maintenance",
    }
    equipment_response = client.post("/api/equipment/", json=equipment_payload)
    assert equipment_response.status_code == 200
    equipment_id = equipment_response.json()["id"]
    return scenario_id, equipment_id


def _create_maintenance_payload(equipment_id: int, scenario_id: int, description: str):
    return {
        "equipment_id": equipment_id,
        "scenario_id": scenario_id,
        "maintenance_date": "2025-10-20",
        "description": description,
        "cost": 100.0,
    }


def test_create_and_list_maintenance():
    scenario_id, equipment_id = _create_scenario_and_equipment()
    payload = _create_maintenance_payload(
        equipment_id, scenario_id, "Create maintenance")

    response = client.post("/api/maintenance/", json=payload)
    assert response.status_code == 201
    created = response.json()
    assert created["equipment_id"] == equipment_id
    assert created["scenario_id"] == scenario_id
    assert created["description"] == "Create maintenance"

    list_response = client.get("/api/maintenance/")
    assert list_response.status_code == 200
    items = list_response.json()
    assert any(item["id"] == created["id"] for item in items)


def test_get_maintenance():
    scenario_id, equipment_id = _create_scenario_and_equipment()
    payload = _create_maintenance_payload(
        equipment_id, scenario_id, "Retrieve maintenance"
    )
    create_response = client.post("/api/maintenance/", json=payload)
    assert create_response.status_code == 201
    maintenance_id = create_response.json()["id"]

    response = client.get(f"/api/maintenance/{maintenance_id}")
    assert response.status_code == 200
    data = response.json()
    assert data["id"] == maintenance_id
    assert data["equipment_id"] == equipment_id
    assert data["description"] == "Retrieve maintenance"


def test_update_maintenance():
    scenario_id, equipment_id = _create_scenario_and_equipment()
    create_response = client.post(
        "/api/maintenance/",
        json=_create_maintenance_payload(
            equipment_id, scenario_id, "Maintenance before update"
        ),
    )
    assert create_response.status_code == 201
    maintenance_id = create_response.json()["id"]

    update_payload = {
        "equipment_id": equipment_id,
        "scenario_id": scenario_id,
        "maintenance_date": "2025-11-01",
        "description": "Maintenance after update",
        "cost": 250.0,
    }

    response = client.put(
        f"/api/maintenance/{maintenance_id}", json=update_payload)
    assert response.status_code == 200
    updated = response.json()
    assert updated["maintenance_date"] == "2025-11-01"
    assert updated["description"] == "Maintenance after update"
    assert updated["cost"] == 250.0


def test_delete_maintenance():
    scenario_id, equipment_id = _create_scenario_and_equipment()
    create_response = client.post(
        "/api/maintenance/",
        json=_create_maintenance_payload(
            equipment_id, scenario_id, "Delete maintenance"),
    )
    assert create_response.status_code == 201
    maintenance_id = create_response.json()["id"]

    delete_response = client.delete(f"/api/maintenance/{maintenance_id}")
    assert delete_response.status_code == 204

    get_response = client.get(f"/api/maintenance/{maintenance_id}")
    assert get_response.status_code == 404