#!/usr/bin/env python

from __future__ import print_function

import os
from os.path import dirname, abspath
import sys
import lister
import argparse
import subprocess
import six

exclude="""
api/integrations/
api/zulip/__init__.py
bots/jabber_mirror_backend.py
bots/zephyr_mirror_backend.py
docs/conf.py
puppet/zulip_internal/files/postgresql/pg_backup_and_purge.py
tools/deprecated/
tools/lister.py
zproject/
zerver/lib/actions.py
zerver/lib/bugdown/fenced_code.py
zerver/lib/statistics.py
zerver/migrations/
zerver/tests/
zilencer/models.py
""".split()

parser = argparse.ArgumentParser(description="Run mypy on files tracked by git.")
parser.add_argument('targets', nargs='*', default=[],
                    help="""files and directories to include in the result.
                    If this is not specified, the current directory is used""")
parser.add_argument('-m', '--modified', action='store_true', default=False, help='list only modified files')
parser.add_argument('-a', '--all', dest='all', action='store_true', default=False,
                    help="""run mypy on all python files, ignoring the exclude list.
                    This is useful if you have to find out which files fail mypy check.""")
args = parser.parse_args()
if args.all:
    exclude = []

python_files = lister.list_files(targets=args.targets, ftypes=['py'], use_shebang=False,
                                 modified_only=args.modified, exclude=exclude)

# Use zulip-py3-venv's mypy if it's available and we're on python 2
PY3_VENV_DIR = "/srv/zulip-py3-venv"
MYPY_VENV_PATH = os.path.join(PY3_VENV_DIR, "bin", "mypy")
if six.PY2 and os.path.exists(MYPY_VENV_PATH):
    mypy_command = MYPY_VENV_PATH
    print("Using mypy from", mypy_command)
else:
    mypy_command = "mypy"

if python_files:
    rc = subprocess.call([mypy_command, "--silent", "--py2", "--check-untyped-defs"] + python_files)
    if not rc:
        print("The mypy static type checker for python detected no errors!")
    else:
        print("\nThe mypy static type checker for Python threw some errors,")
        print("which indicates a bug in your code or incorrect type annotations.")
        print("Please see http://zulip.readthedocs.io/en/latest/mypy.html for details")
        print("on mypy, how Zulip is using mypy, and how to debug common issues.")
    sys.exit(rc)
else:
    print("There are no files to run mypy on.")