import pytest

from dvc.dvcfile import FileIsGitIgnored, Lockfile
from dvc.stage import PipelineStage
from dvc.utils.strictyaml import YAMLValidationError


def test_stage_dump_no_outs_deps(tmp_dir, dvc):
    stage = PipelineStage(name="s1", repo=dvc, path="path", cmd="command")
    lockfile = Lockfile(dvc, "path.lock")
    lockfile.dump(stage)
    assert lockfile.load() == {
        "schema": "2.0",
        "stages": {"s1": {"cmd": "command"}},
    }


def test_stage_dump_when_already_exists(tmp_dir, dvc):
    data = {"s1": {"cmd": "command", "deps": [], "outs": []}}
    (tmp_dir / "path.lock").dump({"schema": "2.0", "stages": data})
    stage = PipelineStage(name="s2", repo=dvc, path="path", cmd="command2")
    lockfile = Lockfile(dvc, "path.lock")
    lockfile.dump(stage)
    assert lockfile.load() == {
        "schema": "2.0",
        "stages": {**data, "s2": {"cmd": "command2"}},
    }


def test_stage_dump_with_deps_and_outs(tmp_dir, dvc):
    data = {
        "s1": {
            "cmd": "command",
            "deps": [{"md5": "1.txt", "path": "checksum"}],
            "outs": [{"md5": "2.txt", "path": "checksum"}],
        }
    }
    (tmp_dir / "path.lock").dump({"schema": "2.0", "stages": data})
    lockfile = Lockfile(dvc, "path.lock")
    stage = PipelineStage(name="s2", repo=dvc, path="path", cmd="command2")
    lockfile.dump(stage)
    assert lockfile.load() == {
        "schema": "2.0",
        "stages": {**data, "s2": {"cmd": "command2"}},
    }


def test_stage_overwrites_if_already_exists(tmp_dir, dvc):
    lockfile = Lockfile(dvc, "path.lock")
    stage = PipelineStage(name="s2", repo=dvc, path="path", cmd="command2")
    lockfile.dump(stage)
    stage = PipelineStage(name="s2", repo=dvc, path="path", cmd="command3")
    lockfile.dump(stage)
    assert lockfile.load() == {
        "schema": "2.0",
        "stages": {"s2": {"cmd": "command3"}},
    }


def test_load_when_lockfile_does_not_exist(tmp_dir, dvc):
    assert {} == Lockfile(dvc, "pipelines.lock").load()


@pytest.mark.parametrize(
    "corrupt_data",
    [
        {"s1": {"outs": []}},
        {"s1": {}},
        {
            "s1": {
                "cmd": "command",
                "outs": [{"md5": "checksum", "path": "path", "random": "value"}],
            }
        },
        {"s1": {"cmd": "command", "deps": [{"md5": "checksum"}]}},
    ],
)
def test_load_when_lockfile_is_corrupted(tmp_dir, dvc, corrupt_data):
    (tmp_dir / "Dvcfile.lock").dump(corrupt_data)
    lockfile = Lockfile(dvc, "Dvcfile.lock")
    with pytest.raises(YAMLValidationError) as exc_info:
        lockfile.load()
    assert "Dvcfile.lock" in str(exc_info.value)


@pytest.mark.parametrize("dvcignored", [True, False])
@pytest.mark.parametrize("file_exists", [True, False])
def test_try_loading_lockfile_that_is_gitignored(
    tmp_dir, dvc, scm, dvcignored, file_exists
):
    # it should raise error if the file is git-ignored, even if:
    #   1. The file does not exist at all.
    #   2. Or, is dvc-ignored.
    files = [".gitignore"]
    if dvcignored:
        files.append(".dvcignore")

    for file in files:
        with (tmp_dir / file).open(mode="a+") as fd:
            fd.write("dvc.lock")

    if file_exists:
        (tmp_dir / "dvc.lock").write_text("")

    scm._reset()

    with pytest.raises(FileIsGitIgnored) as exc_info:
        Lockfile(dvc, "dvc.lock").load()

    assert str(exc_info.value) == "'dvc.lock' is git-ignored."
