#!/usr/bin/env python
from __future__ import print_function

import argparse
import glob
import os
import shutil
import sys
import tempfile

from subprocess import check_call, check_output


_PACKAGE_NAME = os.environ.get(
    'CLI_PACKAGE_NAME', 'github.com/urfave/cli'
)
_TARGETS = {}


def main(sysargs=sys.argv[:]):
    parser = argparse.ArgumentParser()
    parser.add_argument(
        'target', nargs='?', choices=tuple(_TARGETS.keys()), default='test'
    )
    args = parser.parse_args(sysargs[1:])

    _TARGETS[args.target]()
    return 0


def _target(func):
    _TARGETS[func.__name__.strip('_')] = func
    return func


@_target
def _test():
    if check_output('go version'.split()).split()[2] < 'go1.2':
        _run('go test -v .'.split())
        return

    coverprofiles = []
    for subpackage in ['', 'altsrc']:
        coverprofile = 'cli.coverprofile'
        if subpackage != '':
            coverprofile = '{}.coverprofile'.format(subpackage)

        coverprofiles.append(coverprofile)

        _run('go test -v'.split() + [
            '-coverprofile={}'.format(coverprofile),
            ('{}/{}'.format(_PACKAGE_NAME, subpackage)).rstrip('/')
        ])

    combined_name = _combine_coverprofiles(coverprofiles)
    _run('go tool cover -func={}'.format(combined_name).split())
    os.remove(combined_name)


@_target
def _gfmxr():
    _run(['gfmxr', '-c', str(_gfmxr_count()), '-s', 'README.md'])


@_target
def _vet():
    _run('go vet ./...'.split())


@_target
def _migrations():
    migration_script = os.path.abspath(
        os.environ.get('V1TOV2', './cli-v1-to-v2')
    )
    v1_readme_url = os.environ.get(
        'V1README',
        'https://raw.githubusercontent.com/urfave/cli/v1/README.md'
    )

    tmpdir = tempfile.mkdtemp()
    try:
        os.chdir(tmpdir)
        _run('curl -sSL -o README.md {}'.format(v1_readme_url).split())
        _run('gfmxr extract -o .'.split())

        for gofile in glob.glob('*.go'):
            for i in (0, 1):
                _run(['python', migration_script, '-w', gofile])
                _run('go build -o tmp.out {}'.format(gofile).split())
    finally:
        shutil.rmtree(tmpdir, ignore_errors=True)


def _run(command):
    print('runtests: {}'.format(' '.join(command)), file=sys.stderr)
    check_call(command)


def _gfmxr_count():
    with open('README.md') as infile:
        lines = infile.read().splitlines()
        return len(filter(_is_go_runnable, lines))


def _is_go_runnable(line):
    return line.startswith('package main')


def _combine_coverprofiles(coverprofiles):
    combined = tempfile.NamedTemporaryFile(
        suffix='.coverprofile', delete=False
    )
    combined.write('mode: set\n')

    for coverprofile in coverprofiles:
        with open(coverprofile, 'r') as infile:
            for line in infile.readlines():
                if not line.startswith('mode: '):
                    combined.write(line)

    combined.flush()
    name = combined.name
    combined.close()
    return name


if __name__ == '__main__':
    sys.exit(main())