#!/usr/bin/env python3
from __future__ import print_function
from __future__ import absolute_import
import logging
import os
import sys
import argparse

# check for the venv
from lib import sanity_check
sanity_check.check_venv(__file__)

from zulint import lister
from zulint.command import add_default_linter_arguments, LinterConfig
from typing import cast, Callable, Dict, Iterator, List
import random

def run():
    # type: () -> None
    parser = argparse.ArgumentParser()
    parser.add_argument('--force', default=False,
                        action="store_true",
                        help='Run tests despite possible problems.')
    parser.add_argument('--full',
                        action='store_true',
                        help='Check some things we typically ignore')
    parser.add_argument('--no-gitlint',
                        action='store_true',
                        help='Disable gitlint')
    limited_tests_group = parser.add_mutually_exclusive_group()
    limited_tests_group.add_argument('--frontend',
                                     action='store_true',
                                     help='Only check files relevant to frontend')
    limited_tests_group.add_argument('--backend',
                                     action='store_true',
                                     help='Only check files relevant to backend')
    add_default_linter_arguments(parser)
    args = parser.parse_args()

    tools_dir = os.path.dirname(os.path.abspath(__file__))
    root_dir = os.path.dirname(tools_dir)
    sys.path.insert(0, root_dir)

    from tools.linter_lib.custom_check import build_custom_checkers
    from tools.linter_lib.exclude import EXCLUDED_FILES, PUPPET_CHECK_RULES_TO_EXCLUDE
    from tools.linter_lib.pyflakes import check_pyflakes
    from tools.linter_lib.pep8 import check_pep8

    from tools.lib.test_script import (
        get_provisioning_status,
    )

    os.chdir(root_dir)

    if not args.force:
        ok, msg = get_provisioning_status()
        if not ok:
            print(msg)
            print('If you really know what you are doing, use --force to run anyway.')
            sys.exit(1)

    backend_file_types = ['py', 'sh', 'pp', 'json', 'md', 'txt', 'text', 'yaml', 'rst']
    frontend_file_types = ['js', 'css', 'scss', 'handlebars', 'html']
    file_types = backend_file_types + frontend_file_types
    if args.backend:
        file_types = backend_file_types
    if args.frontend:
        file_types = frontend_file_types

    by_lang = cast(Dict[str, List[str]],
                   lister.list_files(args.targets, modified_only=args.modified,
                                     ftypes=file_types,
                                     use_shebang=True, group_by_ftype=True, exclude=EXCLUDED_FILES))

    # Invoke the appropriate lint checker for each language,
    # and also check files for extra whitespace.

    logging.basicConfig(format="%(asctime)s %(message)s")
    logger = logging.getLogger()
    if args.verbose:
        logger.setLevel(logging.INFO)
    else:
        logger.setLevel(logging.WARNING)

    check_custom_checks_py, check_custom_checks_nonpy = build_custom_checkers(by_lang)

    linter_config = LinterConfig(by_lang)
    linter_config.external_linter('add_class', ['tools/find-add-class'], ['js'])
    linter_config.external_linter('css', ['node', 'node_modules/.bin/stylelint'], ['css', 'scss'])
    linter_config.external_linter('eslint', ['node', 'node_modules/.bin/eslint',
                                             '--quiet', '--cache'], ['js'])
    linter_config.external_linter('tslint', ['node', 'node_modules/.bin/tslint', '-c',
                                             'static/ts/tslint.json'], ['ts'])
    linter_config.external_linter('puppet', ['puppet', 'parser', 'validate'], ['pp'])
    linter_config.external_linter('puppet-lint',
                                  ['puppet-lint'] + PUPPET_CHECK_RULES_TO_EXCLUDE, ['pp'])
    linter_config.external_linter('templates', ['tools/check-templates'], ['handlebars', 'html'])
    linter_config.external_linter('urls', ['tools/check-urls'], ['py'])
    linter_config.external_linter('swagger', ['node', 'tools/check-swagger'], ['yaml'])
    linter_config.external_linter('shellcheck', ['shellcheck', '-x'], ['sh'])

    # Disabled check for imperative mood until it is stabilized
    if not args.no_gitlint:
        linter_config.external_linter('commit_messages', ['tools/commit-message-lint'])

    @linter_config.lint
    def custom_py():
        # type: () -> int
        failed = check_custom_checks_py()
        return 1 if failed else 0

    @linter_config.lint
    def custom_nonpy():
        # type: () -> int
        failed = check_custom_checks_nonpy()
        return 1 if failed else 0

    @linter_config.lint
    def pyflakes():
        # type: () -> int
        failed = check_pyflakes(by_lang['py'], args)
        return 1 if failed else 0

    python_part1 = {x for x in by_lang['py'] if random.randint(0, 1) == 0}
    python_part2 = {y for y in by_lang['py'] if y not in python_part1}

    @linter_config.lint
    def pep8_1of2():
        # type: () -> int
        failed = check_pep8(list(python_part1))
        return 1 if failed else 0

    @linter_config.lint
    def pep8_2of2():
        # type: () -> int
        failed = check_pep8(list(python_part2))
        return 1 if failed else 0

    linter_config.do_lint()

if __name__ == '__main__':
    run()