from contextlib import contextmanager
from tempfile import NamedTemporaryFile
import os
import io
import pathlib
import sys

import pytest
import responses
from testpath import modified_env
from unittest.mock import patch

from flit import upload
from flit.build import ALL_FORMATS

samples_dir = pathlib.Path(__file__).parent / 'samples'

repo_settings = {'url': upload.PYPI,
                 'username': 'user',
                 'password': 'pw',
                 'is_warehouse': True,
                }

pypirc1 = """
[distutils]
index-servers =
    pypi

[pypi]
username: fred
password: s3cret
"""
# That's not a real password. Well, hopefully not.

@contextmanager
def temp_pypirc(content):
    try:
        temp_file = NamedTemporaryFile("w+", delete=False)
        temp_file.write(content)
        temp_file.close()
        yield temp_file.name
    finally:
        os.unlink(temp_file.name)


@responses.activate
def test_upload(copy_sample):
    responses.add(responses.POST, upload.PYPI, status=200)
    td = copy_sample('module1_toml')

    with temp_pypirc(pypirc1) as pypirc, \
        patch('flit.upload.get_repository', return_value=repo_settings):
            upload.main(td / 'pyproject.toml', repo_name='pypi', pypirc_path=pypirc)

    assert len(responses.calls) == 2

def test_get_repository():
    with temp_pypirc(pypirc1) as pypirc:
        repo = upload.get_repository(pypirc_path=pypirc)
        assert repo['url'] == upload.PYPI
        assert repo['username'] == 'fred'
        assert repo['password'] == 's3cret'

def test_get_repository_env():
    with temp_pypirc(pypirc1) as pypirc, \
        modified_env({
        'FLIT_INDEX_URL': 'https://pypi.example.com',
        'FLIT_USERNAME': 'alice',
        'FLIT_PASSWORD': 'p4ssword',  # Also not a real password
    }):
        repo = upload.get_repository(pypirc_path=pypirc)
        # Because we haven't specified a repo name, environment variables should
        # have higher priority than the config file.
        assert repo['url'] == 'https://pypi.example.com'
        assert repo['username'] == 'alice'
        assert repo['password'] == 'p4ssword'

@contextmanager
def _fake_keyring(pw):
    class FakeKeyring:
        @staticmethod
        def get_password(service_name, username):
            return pw

    class FakeKeyringErrMod:
        class KeyringError(Exception):
            pass

    with patch.dict('sys.modules', {
        'keyring': FakeKeyring(), 'keyring.errors': FakeKeyringErrMod(),
    }):
        yield

pypirc2 = """
[distutils]
index-servers =
    pypi

[pypi]
username: fred
"""

def test_get_repository_keyring():
    with modified_env({'FLIT_PASSWORD': None}), \
            _fake_keyring('tops3cret'):
        repo = upload.get_repository(pypirc_path=io.StringIO(pypirc2))

    assert repo['username'] == 'fred'
    assert repo['password'] == 'tops3cret'


pypirc3_repo = "https://invalid-repo.inv"
pypirc3_user = "test"
pypirc3_pass = "not_a_real_password"
pypirc3 = f"""
[distutils] =
index-servers =
    test123

[test123]
repository: {pypirc3_repo}
username: {pypirc3_user}
password: {pypirc3_pass}
"""


def test_upload_pypirc_file(copy_sample):
    with temp_pypirc(pypirc3) as pypirc, \
        patch("flit.upload.upload_file") as upload_file:
        td = copy_sample("module1_toml")
        formats = list(ALL_FORMATS)[:1]
        upload.main(
            td / "pyproject.toml",
            formats=set(formats),
            repo_name="test123",
            pypirc_path=pypirc,
        )
        _, _, repo = upload_file.call_args[0]

        assert repo["url"] == pypirc3_repo
        assert repo["username"] == pypirc3_user
        assert repo["password"] == pypirc3_pass


def test_upload_invalid_pypirc_file(copy_sample):
    with patch("flit.upload.upload_file"):
        td = copy_sample("module1_toml")
        formats = list(ALL_FORMATS)[:1]
        with pytest.raises(FileNotFoundError):
            upload.main(
                td / "pyproject.toml",
                formats=set(formats),
                repo_name="test123",
                pypirc_path="./file.invalid",
            )

def test_upload_default_pypirc_file(copy_sample):
    with patch("flit.upload.do_upload") as do_upload:
        td = copy_sample("module1_toml")
        formats = list(ALL_FORMATS)[:1]
        upload.main(
            td / "pyproject.toml",
            formats=set(formats),
            repo_name="test123",
        )

        file = do_upload.call_args[0][2]
        assert file == "~/.pypirc"