from __future__ import annotations

import logging
from optparse import Values
from typing import List

from pip._internal.cli.base_command import Command
from pip._internal.cli.status_codes import ERROR
from pip._internal.cli.status_codes import SUCCESS
from pip._internal.operations.check import check_package_set
from pip._internal.operations.check import create_package_set_from_installed
from pip._internal.utils.misc import write_output

logger = logging.getLogger(__name__)


class CheckCommand(Command):
    """Verify installed packages have compatible dependencies."""

    usage = """
      %prog [options]"""

    def run(self, options: Values, args: list[str]) -> int:

        package_set, parsing_probs = create_package_set_from_installed()
        missing, conflicting = check_package_set(package_set)

        for project_name in missing:
            version = package_set[project_name].version
            for dependency in missing[project_name]:
                write_output(
                    '%s %s requires %s, which is not installed.',
                    project_name,
                    version,
                    dependency[0],
                )

        for project_name in conflicting:
            version = package_set[project_name].version
            for dep_name, dep_version, req in conflicting[project_name]:
                write_output(
                    '%s %s has requirement %s, but you have %s %s.',
                    project_name,
                    version,
                    req,
                    dep_name,
                    dep_version,
                )

        if missing or conflicting or parsing_probs:
            return ERROR
        else:
            write_output('No broken requirements found.')
            return SUCCESS