import pytest

pytestmark = [pytest.mark.api, pytest.mark.integration]

from datetime import date

from app import create_app, db
from app.models import User, Client, Project, Invoice, ApiToken


@pytest.fixture
def app():
    app = create_app(
        {
            "TESTING": True,
            "SQLALCHEMY_DATABASE_URI": "sqlite:///test_api_credit_notes.sqlite",
            "WTF_CSRF_ENABLED": False,
        }
    )
    with app.app_context():
        db.create_all()
        yield app
        db.session.remove()
        db.drop_all()


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


@pytest.fixture
def user(app):
    u = User(username="cnuser", email="cn@example.com", role="admin")
    u.is_active = True
    db.session.add(u)
    db.session.commit()
    return u


@pytest.fixture
def api_token(app, user):
    token, plain = ApiToken.create_token(user_id=user.id, name="CN Token", scopes="read:invoices,write:invoices")
    db.session.add(token)
    db.session.commit()
    return plain


@pytest.fixture
def setup_invoice(app, user):
    c = Client(name="CN Client", email="client@example.com")
    db.session.add(c)
    db.session.commit()
    p = Project(name="CN Project", client_id=c.id, status="active")
    db.session.add(p)
    db.session.commit()
    inv = Invoice(
        invoice_number=Invoice.generate_invoice_number(),
        project_id=p.id,
        client_name=c.name,
        client_id=c.id,
        due_date=date.today(),
        created_by=user.id,
    )
    db.session.add(inv)
    db.session.commit()
    return inv


def _auth(t):
    return {"Authorization": f"Bearer {t}", "Content-Type": "application/json"}


def test_credit_notes_crud(client, api_token, setup_invoice):
    inv = setup_invoice
    # list empty
    r = client.get(f"/api/v1/credit-notes?invoice_id={inv.id}", headers=_auth(api_token))
    assert r.status_code == 200
    assert r.get_json()["credit_notes"] == []

    # create
    payload = {"invoice_id": inv.id, "amount": 10.0, "reason": "Discount"}
    r = client.post("/api/v1/credit-notes", headers=_auth(api_token), json=payload)
    assert r.status_code == 201
    cn_id = r.get_json()["credit_note"]["id"]

    # get
    r = client.get(f"/api/v1/credit-notes/{cn_id}", headers=_auth(api_token))
    assert r.status_code == 200

    # update
    r = client.patch(f"/api/v1/credit-notes/{cn_id}", headers=_auth(api_token), json={"reason": "Updated"})
    assert r.status_code == 200

    # delete
    r = client.delete(f"/api/v1/credit-notes/{cn_id}", headers=_auth(api_token))
    assert r.status_code == 200
