"""QMK CLI Subcommands

We list each subcommand here explicitly because all the reliable ways of searching for modules are slow and delay startup.
"""
import os
import shlex
import sys
from importlib.util import find_spec
from pathlib import Path
from subprocess import run

from milc import cli, __VERSION__
from milc.questions import yesno


def _run_cmd(*command):
    """Run a command in a subshell.
    """
    if 'windows' in cli.platform.lower():
        safecmd = map(shlex.quote, command)
        safecmd = ' '.join(safecmd)
        command = [os.environ['SHELL'], '-c', safecmd]

    return run(command)


def _find_broken_requirements(requirements):
    """ Check if the modules in the given requirements.txt are available.

    Args:

        requirements
            The path to a requirements.txt file

    Returns a list of modules that couldn't be imported
    """
    with Path(requirements).open() as fd:
        broken_modules = []

        for line in fd.readlines():
            line = line.strip().replace('<', '=').replace('>', '=')

            if len(line) == 0 or line[0] == '#' or line.startswith('-r'):
                continue

            if '#' in line:
                line = line.split('#')[0]

            module_name = line.split('=')[0] if '=' in line else line
            module_import = module_name.replace('-', '_')

            # Not every module is importable by its own name.
            if module_name == "pep8-naming":
                module_import = "pep8ext_naming"
            elif module_name == 'pyusb':
                module_import = 'usb.core'

            if not find_spec(module_import):
                broken_modules.append(module_name)

        return broken_modules


def _broken_module_imports(requirements):
    """Make sure we can import all the python modules.
    """
    broken_modules = _find_broken_requirements(requirements)

    for module in broken_modules:
        print('Could not find module %s!' % module)

    if broken_modules:
        return True

    return False


# Make sure our python is new enough
#
# Supported version information
#
# Based on the OSes we support these are the minimum python version available by default.
# Last update: 2021 Jan 02
#
# Arch: 3.9
# Debian: 3.7
# Fedora 31: 3.7
# Fedora 32: 3.8
# Fedora 33: 3.9
# FreeBSD: 3.7
# Gentoo: 3.7
# macOS: 3.9 (from homebrew)
# msys2: 3.8
# Slackware: 3.7
# solus: 3.7
# void: 3.9

if sys.version_info[0] != 3 or sys.version_info[1] < 7:
    print('Error: Your Python is too old! Please upgrade to Python 3.7 or later.')
    exit(127)

milc_version = __VERSION__.split('.')

if int(milc_version[0]) < 2 and int(milc_version[1]) < 3:
    requirements = Path('requirements.txt').resolve()

    print(f'Your MILC library is too old! Please upgrade: python3 -m pip install -U -r {str(requirements)}')
    exit(127)

# Check to make sure we have all our dependencies
msg_install = 'Please run `python3 -m pip install -r %s` to install required python dependencies.'

if _broken_module_imports('requirements.txt'):
    if yesno('Would you like to install the required Python modules?'):
        _run_cmd(sys.executable, '-m', 'pip', 'install', '-r', 'requirements.txt')
    else:
        print()
        print(msg_install % (str(Path('requirements.txt').resolve()),))
        print()
        exit(1)

if cli.config.user.developer:
    args = sys.argv[1:]
    while args and args[0][0] == '-':
        del args[0]
    if not args or args[0] != 'config':
        if _broken_module_imports('requirements-dev.txt'):
            if yesno('Would you like to install the required developer Python modules?'):
                _run_cmd(sys.executable, '-m', 'pip', 'install', '-r', 'requirements-dev.txt')
            elif yesno('Would you like to disable developer mode?'):
                _run_cmd(sys.argv[0], 'config', 'user.developer=None')
            else:
                print()
                print(msg_install % (str(Path('requirements-dev.txt').resolve()),))
                print('You can also turn off developer mode: qmk config user.developer=None')
                print()
                exit(1)

# Import our subcommands
from . import c2json  # noqa
from . import cformat  # noqa
from . import chibios  # noqa
from . import clean  # noqa
from . import compile  # noqa
from . import config  # noqa
from . import console  # noqa
from . import docs  # noqa
from . import doctor  # noqa
from . import fileformat  # noqa
from . import flash  # noqa
from . import format  # noqa
from . import generate  # noqa
from . import hello  # noqa
from . import info  # noqa
from . import json2c  # noqa
from . import lint  # noqa
from . import list  # noqa
from . import kle2json  # noqa
from . import multibuild  # noqa
from . import new  # noqa
from . import pyformat  # noqa
from . import pytest  # noqa