from __future__ import annotations

from datetime import datetime, timedelta, timezone
from os.path import join as pjoin
from pathlib import Path
from random import choice as randchoice
from shutil import rmtree
from typing import TYPE_CHECKING, Callable
from uuid import uuid4

import pytest
from _pytest.fixtures import SubRequest
from faker import Faker

if TYPE_CHECKING:
    from generalresearch.config import GRLBaseSettings
    from generalresearch.incite.base import GRLDatasets
    from generalresearch.incite.collections import (
        DFCollectionItem,
        DFCollectionType,
    )
    from generalresearch.incite.mergers import MergeType
    from generalresearch.models.admin.request import (
        ReportRequest,
    )
    from generalresearch.models.thl.product import Product
    from generalresearch.models.thl.session import Session
    from generalresearch.models.thl.user import User


fake = Faker()


@pytest.fixture
def mnt_gr_api_dir(request: SubRequest, settings: GRLBaseSettings) -> Path:
    p = Path(settings.mnt_gr_api_dir)
    p.mkdir(parents=True, exist_ok=True)

    from generalresearch.models.admin.request import ReportType

    for e in list(ReportType):
        Path(pjoin(p, e.value)).mkdir(exist_ok=True)

    def tmp_file_teardown():
        assert "/mnt/" not in str(p), (
            "Under no condition, testing or otherwise should we have code delete "
            " any folders or potential data on a network mount"
        )

        rmtree(p)

    request.addfinalizer(tmp_file_teardown)

    return p


@pytest.fixture
def event_report_request(utc_hour_ago: datetime, start: datetime) -> ReportRequest:
    from generalresearch.models.admin.request import (
        ReportRequest,
        ReportType,
    )

    return ReportRequest.model_validate(
        {
            "report_type": ReportType.POP_EVENT,
            "interval": "5min",
            "start": start,
        }
    )


@pytest.fixture
def session_report_request(utc_hour_ago: datetime, start: datetime) -> ReportRequest:
    from generalresearch.models.admin.request import (
        ReportRequest,
        ReportType,
    )

    return ReportRequest.model_validate(
        {
            "report_type": ReportType.POP_SESSION,
            "interval": "5min",
            "start": start,
        }
    )


@pytest.fixture
def mnt_filepath(request: SubRequest) -> GRLDatasets:
    """
    Creates a temporary file path for all DFCollections &
    Mergers parquet files.
    """
    from generalresearch.incite.base import GRLDatasets, NFSMount

    instance = GRLDatasets(
        data_src=Path(pjoin("/tmp", f"test-{uuid4().hex[:12]}")),
        incite=NFSMount(point="thl-incite"),
    )

    def tmp_file_teardown():
        assert "/mnt/" not in str(instance.data_src), (
            "Under no condition, testing or otherwise should we have code delete "
            " any folders or potential data on a network mount"
        )

        rmtree(instance.data_src)

    request.addfinalizer(tmp_file_teardown)

    return instance


@pytest.fixture
def start(utc_90days_ago: datetime) -> datetime:
    s = utc_90days_ago.replace(microsecond=0)
    return s


@pytest.fixture
def offset() -> str:
    return "15min"


@pytest.fixture
def duration() -> timedelta | None:
    return timedelta(hours=1)


@pytest.fixture
def df_collection_data_type() -> DFCollectionType:
    from generalresearch.incite.collections import DFCollectionType

    return DFCollectionType.TEST


@pytest.fixture
def merge_type() -> MergeType:
    from generalresearch.incite.mergers import MergeType

    return MergeType.TEST


@pytest.fixture
def incite_item_factory(
    session_factory: Callable[..., Session],
    product: Product,
    user_factory: Callable[..., User],
    session_with_tx_factory: Callable[..., Session],
) -> Callable[..., None]:

    def _inner(
        item: DFCollectionItem,
        observations: int = 3,
        user: User | None = None,
    ):
        from generalresearch.incite.collections import (
            DFCollection,
            DFCollectionType,
        )
        from generalresearch.models.thl.session import Source

        collection: DFCollection = item._collection
        data_type: DFCollectionType = collection.data_type

        for _ in range(5):
            item_time = fake.date_time_between(
                start_date=item.start, end_date=item.finish, tzinfo=timezone.utc
            )

            match data_type:
                case DFCollectionType.USER:
                    user_factory(product=product, created=item_time)

                case DFCollectionType.LEDGER:
                    session_with_tx_factory(started=item_time, user=user)

                case DFCollectionType.WALL:
                    u = (
                        user
                        if user
                        else user_factory(product=product, created=item_time)
                    )
                    session_factory(
                        user=u,
                        started=item_time,
                        wall_source=randchoice(list(Source)),
                    )

                case DFCollectionType.SESSION:
                    u = (
                        user
                        if user
                        else user_factory(product=product, created=item_time)
                    )
                    session_factory(
                        user=u,
                        started=item_time,
                        wall_source=randchoice(list(Source)),
                    )

                case _:
                    raise ValueError("Unsupported DFCollectionItem")

    return _inner