from __future__ import with_statement

import json
import logging
import os
import sys
import textwrap
from os.path import join, normpath
from tempfile import mkdtemp

import pretend
import pytest

from pip._internal.req.constructors import install_req_from_line
from pip._internal.utils.misc import rmtree
from tests.lib import assert_all_changes, create_test_package_with_setup
from tests.lib.local_repos import local_checkout, local_repo


@pytest.mark.network
def test_basic_uninstall(script):
    """
    Test basic install and uninstall.

    """
    result = script.pip('install', 'INITools==0.2')
    assert join(script.site_packages, 'initools') in result.files_created, (
        sorted(result.files_created.keys())
    )
    # the import forces the generation of __pycache__ if the version of python
    # supports it
    script.run('python', '-c', "import initools")
    result2 = script.pip('uninstall', 'INITools', '-y')
    assert_all_changes(result, result2, [script.venv / 'build', 'cache'])


def test_basic_uninstall_distutils(script):
    """
    Test basic install and uninstall.

    """
    script.scratch_path.join("distutils_install").mkdir()
    pkg_path = script.scratch_path / 'distutils_install'
    pkg_path.join("setup.py").write(textwrap.dedent("""
        from distutils.core import setup
        setup(
            name='distutils-install',
            version='0.1',
        )
    """))
    result = script.run('python', pkg_path / 'setup.py', 'install')
    result = script.pip('list', '--format=json')
    assert {"name": "distutils-install", "version": "0.1"} \
        in json.loads(result.stdout)
    result = script.pip('uninstall', 'distutils_install', '-y',
                        expect_stderr=True, expect_error=True)
    assert (
        "Cannot uninstall 'distutils-install'. It is a distutils installed "
        "project and thus we cannot accurately determine which files belong "
        "to it which would lead to only a partial uninstall."
    ) in result.stderr


@pytest.mark.network
def test_basic_uninstall_with_scripts(script):
    """
    Uninstall an easy_installed package with scripts.

    """
    result = script.run('easy_install', 'PyLogo', expect_stderr=True)
    easy_install_pth = script.site_packages / 'easy-install.pth'
    pylogo = sys.platform == 'win32' and 'pylogo' or 'PyLogo'
    assert(pylogo in result.files_updated[easy_install_pth].bytes)
    result2 = script.pip('uninstall', 'pylogo', '-y')
    assert_all_changes(
        result,
        result2,
        [script.venv / 'build', 'cache', easy_install_pth],
    )


@pytest.mark.network
def test_uninstall_easy_install_after_import(script):
    """
    Uninstall an easy_installed package after it's been imported

    """
    result = script.run('easy_install', 'INITools==0.2', expect_stderr=True)
    # the import forces the generation of __pycache__ if the version of python
    # supports it
    script.run('python', '-c', "import initools")
    result2 = script.pip('uninstall', 'INITools', '-y')
    assert_all_changes(
        result,
        result2,
        [
            script.venv / 'build',
            'cache',
            script.site_packages / 'easy-install.pth',
        ]
    )


@pytest.mark.network
def test_uninstall_trailing_newline(script):
    """
    Uninstall behaves appropriately if easy-install.pth
    lacks a trailing newline

    """
    script.run('easy_install', 'INITools==0.2', expect_stderr=True)
    script.run('easy_install', 'PyLogo', expect_stderr=True)
    easy_install_pth = script.site_packages_path / 'easy-install.pth'

    # trim trailing newline from easy-install.pth
    with open(easy_install_pth) as f:
        pth_before = f.read()

    with open(easy_install_pth, 'w') as f:
        f.write(pth_before.rstrip())

    # uninstall initools
    script.pip('uninstall', 'INITools', '-y')
    with open(easy_install_pth) as f:
        pth_after = f.read()

    # verify that only initools is removed
    before_without_initools = [
        line for line in pth_before.splitlines()
        if 'initools' not in line.lower()
    ]
    lines_after = pth_after.splitlines()

    assert lines_after == before_without_initools


@pytest.mark.network
def test_basic_uninstall_namespace_package(script):
    """
    Uninstall a distribution with a namespace package without clobbering
    the namespace and everything in it.

    """
    result = script.pip('install', 'pd.requires==0.0.3', expect_error=True)
    assert join(script.site_packages, 'pd') in result.files_created, (
        sorted(result.files_created.keys())
    )
    result2 = script.pip('uninstall', 'pd.find', '-y', expect_error=True)
    assert join(script.site_packages, 'pd') not in result2.files_deleted, (
        sorted(result2.files_deleted.keys())
    )
    assert join(script.site_packages, 'pd', 'find') in result2.files_deleted, (
        sorted(result2.files_deleted.keys())
    )


def test_uninstall_overlapping_package(script, data):
    """
    Uninstalling a distribution that adds modules to a pre-existing package
    should only remove those added modules, not the rest of the existing
    package.

    See: GitHub issue #355 (pip uninstall removes things it didn't install)
    """
    parent_pkg = data.packages.join("parent-0.1.tar.gz")
    child_pkg = data.packages.join("child-0.1.tar.gz")

    result1 = script.pip('install', parent_pkg, expect_error=False)
    assert join(script.site_packages, 'parent') in result1.files_created, (
        sorted(result1.files_created.keys())
    )
    result2 = script.pip('install', child_pkg, expect_error=False)
    assert join(script.site_packages, 'child') in result2.files_created, (
        sorted(result2.files_created.keys())
    )
    assert normpath(
        join(script.site_packages, 'parent/plugins/child_plugin.py')
    ) in result2.files_created, sorted(result2.files_created.keys())
    # The import forces the generation of __pycache__ if the version of python
    #  supports it
    script.run('python', '-c', "import parent.plugins.child_plugin, child")
    result3 = script.pip('uninstall', '-y', 'child', expect_error=False)
    assert join(script.site_packages, 'child') in result3.files_deleted, (
        sorted(result3.files_created.keys())
    )
    assert normpath(
        join(script.site_packages, 'parent/plugins/child_plugin.py')
    ) in result3.files_deleted, sorted(result3.files_deleted.keys())
    assert join(script.site_packages, 'parent') not in result3.files_deleted, (
        sorted(result3.files_deleted.keys())
    )
    # Additional check: uninstalling 'child' should return things to the
    # previous state, without unintended side effects.
    assert_all_changes(result2, result3, [])


@pytest.mark.parametrize("console_scripts",
                         ["test_ = distutils_install",
                          "test_:test_ = distutils_install"])
def test_uninstall_entry_point(script, console_scripts):
    """
    Test uninstall package with two or more entry points in the same section,
    whose name contain a colon.
    """
    pkg_name = 'ep_install'
    pkg_path = create_test_package_with_setup(
        script,
        name=pkg_name,
        version='0.1',
        entry_points={"console_scripts": [console_scripts, ],
                      "pip_test.ep":
                      ["ep:name1 = distutils_install",
                       "ep:name2 = distutils_install"]
                      }
    )
    script_name = script.bin_path.join(console_scripts.split('=')[0].strip())
    if sys.platform == 'win32':
        script_name += '.exe'
    result = script.pip('install', pkg_path)
    assert script_name.exists
    result = script.pip('list', '--format=json')
    assert {"name": "ep-install", "version": "0.1"} \
        in json.loads(result.stdout)
    script.pip('uninstall', 'ep_install', '-y')
    assert not script_name.exists
    result2 = script.pip('list', '--format=json')
    assert {"name": "ep-install", "version": "0.1"} \
        not in json.loads(result2.stdout)


def test_uninstall_gui_scripts(script):
    """
    Make sure that uninstall removes gui scripts
    """
    pkg_name = "gui_pkg"
    pkg_path = create_test_package_with_setup(
        script,
        name=pkg_name,
        version='0.1',
        entry_points={"gui_scripts": ["test_ = distutils_install", ], }
    )
    script_name = script.bin_path.join('test_')
    if sys.platform == 'win32':
        script_name += '.exe'
    script.pip('install', pkg_path)
    assert script_name.exists
    script.pip('uninstall', pkg_name, '-y')
    assert not script_name.exists


@pytest.mark.network
def test_uninstall_console_scripts(script):
    """
    Test uninstalling a package with more files (console_script entry points,
    extra directories).
    """
    args = ['install']
    args.append('discover')
    result = script.pip(*args, **{"expect_error": True})
    assert script.bin / 'discover' + script.exe in result.files_created, (
        sorted(result.files_created.keys())
    )
    result2 = script.pip('uninstall', 'discover', '-y', expect_error=True)
    assert_all_changes(result, result2, [script.venv / 'build', 'cache'])


@pytest.mark.network
def test_uninstall_easy_installed_console_scripts(script):
    """
    Test uninstalling package with console_scripts that is easy_installed.
    """
    args = ['easy_install']
    args.append('discover')
    result = script.run(*args, **{"expect_stderr": True})
    assert script.bin / 'discover' + script.exe in result.files_created, (
        sorted(result.files_created.keys())
    )
    result2 = script.pip('uninstall', 'discover', '-y')
    assert_all_changes(
        result,
        result2,
        [
            script.venv / 'build',
            'cache',
            script.site_packages / 'easy-install.pth',
        ]
    )


@pytest.mark.network
def test_uninstall_editable_from_svn(script, tmpdir):
    """
    Test uninstalling an editable installation from svn.
    """
    result = script.pip(
        'install', '-e',
        '%s#egg=initools' % local_checkout(
            'svn+http://svn.colorstudy.com/INITools/trunk',
            tmpdir.join("cache"),
        ),
    )
    result.assert_installed('INITools')
    result2 = script.pip('uninstall', '-y', 'initools')
    assert (script.venv / 'src' / 'initools' in result2.files_after)
    assert_all_changes(
        result,
        result2,
        [
            script.venv / 'src',
            script.venv / 'build',
            script.site_packages / 'easy-install.pth'
        ],
    )


@pytest.mark.network
def test_uninstall_editable_with_source_outside_venv(script, tmpdir):
    """
    Test uninstalling editable install from existing source outside the venv.

    """
    cache_dir = tmpdir.join("cache")

    try:
        temp = mkdtemp()
        tmpdir = join(temp, 'pip-test-package')
        _test_uninstall_editable_with_source_outside_venv(
            script,
            tmpdir,
            cache_dir,
        )
    finally:
        rmtree(temp)


def _test_uninstall_editable_with_source_outside_venv(
        script, tmpdir, cache_dir):
    result = script.run(
        'git', 'clone',
        local_repo(
            'git+git://github.com/pypa/pip-test-package',
            cache_dir,
        ),
        tmpdir,
        expect_stderr=True,
    )
    result2 = script.pip('install', '-e', tmpdir)
    assert join(
        script.site_packages, 'pip-test-package.egg-link'
    ) in result2.files_created, list(result2.files_created.keys())
    result3 = script.pip('uninstall', '-y',
                         'pip-test-package', expect_error=True)
    assert_all_changes(
        result,
        result3,
        [script.venv / 'build', script.site_packages / 'easy-install.pth'],
    )


@pytest.mark.network
def test_uninstall_from_reqs_file(script, tmpdir):
    """
    Test uninstall from a requirements file.

    """
    script.scratch_path.join("test-req.txt").write(
        textwrap.dedent("""
            -e %s#egg=initools
            # and something else to test out:
            PyLogo<0.4
        """) %
        local_checkout(
            'svn+http://svn.colorstudy.com/INITools/trunk',
            tmpdir.join("cache")
        )
    )
    result = script.pip('install', '-r', 'test-req.txt')
    script.scratch_path.join("test-req.txt").write(
        textwrap.dedent("""
            # -f, -i, and --extra-index-url should all be ignored by uninstall
            -f http://www.example.com
            -i http://www.example.com
            --extra-index-url http://www.example.com

            -e %s#egg=initools
            # and something else to test out:
            PyLogo<0.4
        """) %
        local_checkout(
            'svn+http://svn.colorstudy.com/INITools/trunk',
            tmpdir.join("cache")
        )
    )
    result2 = script.pip('uninstall', '-r', 'test-req.txt', '-y')
    assert_all_changes(
        result,
        result2,
        [
            script.venv / 'build',
            script.venv / 'src',
            script.scratch / 'test-req.txt',
            script.site_packages / 'easy-install.pth',
        ],
    )


def test_uninstallpathset_no_paths(caplog):
    """
    Test UninstallPathSet logs notification when there are no paths to
    uninstall
    """
    from pip._internal.req.req_uninstall import UninstallPathSet
    from pkg_resources import get_distribution

    caplog.set_level(logging.INFO)

    test_dist = get_distribution('pip')
    uninstall_set = UninstallPathSet(test_dist)
    uninstall_set.remove()  # with no files added to set

    assert (
        "Can't uninstall 'pip'. No files were found to uninstall."
        in caplog.text
    )


def test_uninstall_non_local_distutils(caplog, monkeypatch, tmpdir):
    einfo = tmpdir.join("thing-1.0.egg-info")
    with open(einfo, "wb"):
        pass

    dist = pretend.stub(
        key="thing",
        project_name="thing",
        egg_info=einfo,
        location=einfo,
        _provider=pretend.stub(),
    )
    get_dist = pretend.call_recorder(lambda x: dist)
    monkeypatch.setattr("pip._vendor.pkg_resources.get_distribution", get_dist)

    req = install_req_from_line("thing")
    req.uninstall()

    assert os.path.exists(einfo)


def test_uninstall_wheel(script, data):
    """
    Test uninstalling a wheel
    """
    package = data.packages.join("simple.dist-0.1-py2.py3-none-any.whl")
    result = script.pip('install', package, '--no-index')
    dist_info_folder = script.site_packages / 'simple.dist-0.1.dist-info'
    assert dist_info_folder in result.files_created
    result2 = script.pip('uninstall', 'simple.dist', '-y')
    assert_all_changes(result, result2, [])


def test_uninstall_setuptools_develop_install(script, data):
    """Try uninstall after setup.py develop followed of setup.py install"""
    pkg_path = data.packages.join("FSPkg")
    script.run('python', 'setup.py', 'develop',
               expect_stderr=True, cwd=pkg_path)
    script.run('python', 'setup.py', 'install',
               expect_stderr=True, cwd=pkg_path)
    list_result = script.pip('list', '--format=json')
    assert {"name": os.path.normcase("FSPkg"), "version": "0.1.dev0"} \
        in json.loads(list_result.stdout), str(list_result)
    # Uninstall both develop and install
    uninstall = script.pip('uninstall', 'FSPkg', '-y')
    assert any(filename.endswith('.egg')
               for filename in uninstall.files_deleted.keys())
    uninstall2 = script.pip('uninstall', 'FSPkg', '-y')
    assert join(
        script.site_packages, 'FSPkg.egg-link'
    ) in uninstall2.files_deleted, list(uninstall2.files_deleted.keys())
    list_result2 = script.pip('list', '--format=json')
    assert "FSPkg" not in {p["name"] for p in json.loads(list_result2.stdout)}


def test_uninstall_editable_and_pip_install(script, data):
    """Try uninstall after pip install -e after pip install"""
    # SETUPTOOLS_SYS_PATH_TECHNIQUE=raw removes the assumption that `-e`
    # installs are always higher priority than regular installs.
    # This becomes the default behavior in setuptools 25.
    script.environ['SETUPTOOLS_SYS_PATH_TECHNIQUE'] = 'raw'

    pkg_path = data.packages.join("FSPkg")
    script.pip('install', '-e', '.',
               expect_stderr=True, cwd=pkg_path)
    # ensure both are installed with --ignore-installed:
    script.pip('install', '--ignore-installed', '.',
               expect_stderr=True, cwd=pkg_path)
    list_result = script.pip('list', '--format=json')
    assert {"name": "FSPkg", "version": "0.1.dev0"} \
        in json.loads(list_result.stdout)
    # Uninstall both develop and install
    uninstall = script.pip('uninstall', 'FSPkg', '-y')
    assert not any(filename.endswith('.egg-link')
                   for filename in uninstall.files_deleted.keys())
    uninstall2 = script.pip('uninstall', 'FSPkg', '-y')
    assert join(
        script.site_packages, 'FSPkg.egg-link'
    ) in uninstall2.files_deleted, list(uninstall2.files_deleted.keys())
    list_result2 = script.pip('list', '--format=json')
    assert "FSPkg" not in {p["name"] for p in json.loads(list_result2.stdout)}


def test_uninstall_ignores_missing_packages(script, data):
    """Uninstall of a non existent package prints a warning and exits cleanly
    """
    result = script.pip(
        'uninstall', '-y', 'non-existent-pkg', expect_stderr=True,
    )

    assert "Skipping non-existent-pkg as it is not installed." in result.stderr
    assert result.returncode == 0, "Expected clean exit"


def test_uninstall_ignores_missing_packages_and_uninstalls_rest(script, data):
    script.pip_install_local('simple')
    result = script.pip(
        'uninstall', '-y', 'non-existent-pkg', 'simple', expect_stderr=True,
    )

    assert "Skipping non-existent-pkg as it is not installed." in result.stderr
    assert "Successfully uninstalled simple" in result.stdout
    assert result.returncode == 0, "Expected clean exit"
