from os.path import exists, join
from conda._vendor.auxlib.compat import Utf8NamedTemporaryFile
from unittest import TestCase

from conda.gateways.disk.delete import rm_rf
import pytest

from .test_create import Commands, PYTHON_BINARY, make_temp_env, make_temp_prefix, \
    package_is_installed, run_command


@pytest.mark.integration
class ExportIntegrationTests(TestCase):

    def test_basic(self):
        with make_temp_env("python=3.5") as prefix:
            assert exists(join(prefix, PYTHON_BINARY))
            assert package_is_installed(prefix, 'python=3')

            output, error, _ = run_command(Commands.LIST, prefix, "-e")

            with Utf8NamedTemporaryFile(mode="w", suffix="txt", delete=False) as env_txt:
                env_txt.write(output)
                env_txt.flush()
                env_txt.close()
                prefix2 = make_temp_prefix()
                run_command(Commands.CREATE, prefix2 , "--file", env_txt.name)

                assert package_is_installed(prefix2, "python")

            output2, error, _ = run_command(Commands.LIST, prefix2, "-e")
            self.assertEqual(output, output2)

    @pytest.mark.skipif(True, reason="Bring back `conda list --export` #3445")
    def test_multi_channel_export(self):
        """
            When try to import from txt
            every package should come from same channel
        """
        with make_temp_env("python=3.5") as prefix:
            assert exists(join(prefix, PYTHON_BINARY))
            assert package_is_installed(prefix, 'python=3')

            run_command(Commands.INSTALL, prefix, "six", "-c", "conda-forge")
            assert package_is_installed(prefix, "six")

            output, error, _ = run_command(Commands.LIST, prefix, "-e")
            self.assertIn("conda-forge", output)
            
            try:
                with Utf8NamedTemporaryFile(mode="w", suffix="txt", delete=False) as env_txt:
                    env_txt.write(output)
                    env_txt.close()
                    prefix2 = make_temp_prefix()
                    run_command(Commands.CREATE, prefix2 , "--file", env_txt.name)

                    assert package_is_installed(prefix2, "python")
                output2, error, _ = run_command(Commands.LIST, prefix2, "-e")
                self.assertEqual(output, output2)
            finally:
                rm_rf(env_txt.name)

    def test_multi_channel_explicit(self):
        """
            When try to import from txt
            every package should come from same channel
        """
        with make_temp_env("python=3.5") as prefix:
            assert exists(join(prefix, PYTHON_BINARY))
            assert package_is_installed(prefix, 'python=3')

            run_command(Commands.INSTALL, prefix, "six", "-c", "conda-forge")
            assert package_is_installed(prefix, "conda-forge::six")

            output, error, _ = run_command(Commands.LIST, prefix, "--explicit")
            assert not error
            assert "conda-forge" in output

            urls1 = set(url for url in output.split() if url.startswith("http"))

            try:
                with Utf8NamedTemporaryFile(mode="w", suffix="txt", delete=False) as env_txt:
                    env_txt.write(output)
                    env_txt.close()
                    prefix2 = make_temp_prefix()
                    run_command(Commands.CREATE, prefix2, "--file", env_txt.name)

                    assert package_is_installed(prefix2, "python")
                    assert package_is_installed(prefix2, "six")
                output2, error2, _ = run_command(Commands.LIST, prefix2, "--explicit")
                assert not error2
                urls2 = set(url for url in output2.split() if url.startswith("http"))
                assert urls1 == urls2
            finally:
                rm_rf(env_txt.name)