import filecmp
import os
from uuid import uuid4

import pytest
from mock import patch

import dvc
from dvc.main import main
from dvc.utils import makedirs
from tests.basic_env import TestDvc
from tests.utils import spy


class TestCmdImport(TestDvc):
    def test(self):
        ret = main(["import-url", self.FOO, "import"])
        self.assertEqual(ret, 0)
        self.assertTrue(os.path.exists("import.dvc"))

        ret = main(["import-url", "non-existing-file", "import"])
        self.assertNotEqual(ret, 0)

    def test_unsupported(self):
        ret = main(["import-url", "unsupported://path", "import_unsupported"])
        self.assertNotEqual(ret, 0)


class TestDefaultOutput(TestDvc):
    def test(self):
        tmpdir = self.mkdtemp()
        filename = str(uuid4())
        tmpfile = os.path.join(tmpdir, filename)

        with open(tmpfile, "w") as fd:
            fd.write("content")

        ret = main(["import-url", tmpfile])
        self.assertEqual(ret, 0)
        self.assertTrue(os.path.exists(filename))
        with open(filename) as fd:
            self.assertEqual(fd.read(), "content")


class TestShouldRemoveOutsBeforeImport(TestDvc):
    def setUp(self):
        super().setUp()
        tmp_dir = self.mkdtemp()
        self.external_source = os.path.join(tmp_dir, "file")
        with open(self.external_source, "w") as fobj:
            fobj.write("content")

    def test(self):
        remove_outs_call_counter = spy(dvc.stage.Stage.remove_outs)
        with patch.object(
            dvc.stage.Stage, "remove_outs", remove_outs_call_counter
        ):
            ret = main(["import-url", self.external_source])
            self.assertEqual(0, ret)

        self.assertEqual(1, remove_outs_call_counter.mock.call_count)


class TestImportFilename(TestDvc):
    def setUp(self):
        super().setUp()
        tmp_dir = self.mkdtemp()
        self.external_source = os.path.join(tmp_dir, "file")
        with open(self.external_source, "w") as fobj:
            fobj.write("content")

    def test(self):
        ret = main(["import-url", "-f", "bar.dvc", self.external_source])
        self.assertEqual(0, ret)
        self.assertTrue(os.path.exists("bar.dvc"))

        os.remove("bar.dvc")

        ret = main(["import-url", "--file", "bar.dvc", self.external_source])
        self.assertEqual(0, ret)
        self.assertTrue(os.path.exists("bar.dvc"))

        os.remove("bar.dvc")
        os.mkdir("sub")

        path = os.path.join("sub", "bar.dvc")
        ret = main(["import-url", "--file", path, self.external_source])
        self.assertEqual(0, ret)
        self.assertTrue(os.path.exists(path))


@pytest.mark.parametrize("dname", [".", "dir", "dir/subdir"])
def test_import_url_to_dir(dname, repo_dir, dvc_repo):
    src = repo_dir.DATA

    makedirs(dname, exist_ok=True)

    stage = dvc_repo.imp_url(src, dname)

    dst = os.path.join(dname, os.path.basename(src))

    assert stage.outs[0].fspath == os.path.abspath(dst)
    assert os.path.isdir(dname)
    assert filecmp.cmp(repo_dir.DATA, dst, shallow=False)