"""Funcationality for performing virtualenv installation"""
# Silence this one globally to support the internal function imports for the proxied poetry module.
# See the docstring in 'tox_poetry_installer._poetry' for more context.
# pylint: disable=import-outside-toplevel
import typing
from typing import Sequence
from typing import Set

import tox
from poetry.core.packages import Package as PoetryPackage
from tox.venv import VirtualEnv as ToxVirtualEnv

from tox_poetry_installer import constants
from tox_poetry_installer import utilities

if typing.TYPE_CHECKING:
    from tox_poetry_installer import _poetry


def install(
    poetry: "_poetry.Poetry", venv: ToxVirtualEnv, packages: Sequence[PoetryPackage]
):
    """Install a bunch of packages to a virtualenv

    :param poetry: Poetry object the packages were sourced from
    :param venv: Tox virtual environment to install the packages to
    :param packages: List of packages to install to the virtual environment
    """
    from tox_poetry_installer import _poetry

    tox.reporter.verbosity1(
        f"{constants.REPORTER_PREFIX} Installing {len(packages)} packages to environment at {venv.envconfig.envdir}"
    )

    pip = _poetry.PipInstaller(
        env=utilities.convert_virtualenv(venv),
        io=_poetry.NullIO(),
        pool=poetry.pool,
    )

    installed: Set[PoetryPackage] = set()

    for dependency in packages:
        if dependency not in installed:
            tox.reporter.verbosity2(
                f"{constants.REPORTER_PREFIX} Installing {dependency}"
            )
            pip.install(dependency)
            installed.add(dependency)
        else:
            tox.reporter.verbosity2(
                f"{constants.REPORTER_PREFIX} Skipping {dependency}, already installed"
            )