"""Global configurations and definitions for pytest."""
import datetime
import os
from collections.abc import Generator
from inspect import getmembers, isfunction
from typing import Any

import pytest
from sqlalchemy.engine import Engine
from sqlalchemy.orm import Session

from aki_prj23_transparenzregister.utils import data_transfer
from aki_prj23_transparenzregister.utils.sql import entities
from aki_prj23_transparenzregister.utils.sql.connector import get_session, init_db


@pytest.fixture(autouse=True)
def _clear_caches() -> Generator[None, None, None]:
    """A function that clears all caches after each test.

    All the modules containing the cached functions need to be listed in the modules tuple.
    """
    yield
    # https://stackoverflow.com/a/139198/11003343
    modules = (data_transfer,)
    functions = [
        function
        for module in modules
        for name, function in getmembers(module, isfunction)
        if function.__dict__.get("cache") is not None
    ]
    # https://cachetools.readthedocs.io/en/stable/?highlight=clear#memoizing-decorators
    for function in functions:
        function.cache.clear()  # type: ignore


@pytest.fixture()
def empty_db() -> Generator[Session, None, None]:
    """Generates a db Session to a sql_lite db."""
    if os.path.exists("test-db.db"):
        os.remove("test-db.db")
    db = get_session("sqlite:///test-db.db")
    init_db(db)
    yield db
    db.close()
    bind = db.bind
    assert isinstance(bind, Engine)
    bind.dispose()
    os.remove("test-db.db")


@pytest.fixture()
def finance_statements() -> list[dict[str, Any]]:
    """Creates a list of finance statements."""
    return [
        {
            "id": 1,
            "company_id": 1,
            "date": datetime.date.fromisoformat("2023-01-01"),
            "total_volume": 1000.0,
            "ebit": 1000.0,
            "ebitda": 1000.0,
            "ebit_margin": 1000.0,
            "total_balance": 1000.0,
            "equity": 1000.0,
            "debt": 1000.0,
            "return_on_equity": 1000.0,
            "capital_turnover_rate": 1000.0,
            "current_liabilities": 1000.0,
            "dividends": float("NaN"),
            "net_income": float("NaN"),
            "assets": 1000.0,
            "long_term_debt": 1000.0,
            "short_term_debt": 1000.0,
            "revenue": 1000.0,
            "cash_flow": 1000.0,
            "current_assets": 1000.0,
        },
        {
            "id": 2,
            "company_id": 1,
            "date": datetime.date.fromisoformat("2022-01-01"),
            "total_volume": 1100.0,
            "ebit": 1100.0,
            "ebitda": 1100.0,
            "ebit_margin": 1100.0,
            "total_balance": 1100.0,
            "equity": 1100.0,
            "debt": 1100.0,
            "return_on_equity": 1100.0,
            "capital_turnover_rate": 1100.0,
            "current_liabilities": 1100.0,
            "dividends": float("NaN"),
            "net_income": float("NaN"),
            "assets": 1100.0,
            "long_term_debt": 1100.0,
            "short_term_debt": 1100.0,
            "revenue": 1100.0,
            "cash_flow": 1100.0,
            "current_assets": 1100.0,
        },
    ]


@pytest.fixture()
def full_db(empty_db: Session, finance_statements: list[dict[str, Any]]) -> Session:
    """Fills a db with some test data."""
    empty_db.add_all(
        [
            entities.DistrictCourt(name="Amtsgericht Bochum", city="Bochum"),
            entities.DistrictCourt(name="Amtsgericht Dortmund", city="Dortmund"),
            entities.Person(
                name="Max",
                surname="Mustermann",
                date_of_birth=datetime.date(2023, 1, 1),
            ),
            entities.Person(
                name="Sabine",
                surname="Mustermann",
                date_of_birth=datetime.date(2023, 1, 1),
            ),
            entities.Person(
                name="Some Firstname",
                surname="Some Surname",
                date_of_birth=datetime.date(2023, 1, 1),
            ),
            entities.Person(
                name="Some Firstname",
                surname="Some Surname",
                date_of_birth=datetime.date(2023, 1, 2),
            ),
            entities.Person(
                name="Other Firstname",
                surname="Other Surname",
                date_of_birth=datetime.date(2023, 1, 2),
            ),
        ]
    )
    empty_db.commit()
    empty_db.add_all(
        [
            entities.Company(
                hr="HRB 123",
                court_id=2,
                name="Some Company GmbH",
                street="Sesamstr.",
                zip_code="58644",
                city="TV City",
                last_update=datetime.date.fromisoformat("2023-01-01"),
                latitude=51.3246,
                longitude=7.6968,
                pos_accuracy=4.0,
            ),
            entities.Company(
                hr="HRB 123",
                court_id=1,
                name="Other Company GmbH",
                street="Sesamstr.",
                zip_code="58636",
                city="TV City",
                last_update=datetime.date.fromisoformat("2023-01-01"),
                latitude=51.38,
                longitude=7.7032,
                pos_accuracy=4.0,
            ),
            entities.Company(
                hr="HRB 12",
                court_id=2,
                name="Third Company GmbH",
                last_update=datetime.date.fromisoformat("2023-01-01"),
            ),
        ]
    )
    empty_db.commit()

    empty_db.add_all(
        [
            entities.AnnualFinanceStatement(**finance_statement)
            for finance_statement in finance_statements
        ]
    )
    empty_db.commit()
    # print(pd.read_sql_table("company", empty_db.bind).to_string())
    return empty_db