import textwrap

from dvc.cli import parse_args
from dvc.command.metrics import CmdMetricsDiff, CmdMetricsShow, _show_diff


def test_metrics_diff(dvc, mocker):
    cli_args = parse_args(
        [
            "metrics",
            "diff",
            "HEAD~10",
            "HEAD~1",
            "-R",
            "--all",
            "--show-json",
            "--targets",
            "target1",
            "target2",
            "--show-md",
            "--no-path",
            "--old",
        ]
    )
    assert cli_args.func == CmdMetricsDiff

    cmd = cli_args.func(cli_args)
    m = mocker.patch("dvc.repo.metrics.diff.diff", return_value={})

    assert cmd.run() == 0

    m.assert_called_once_with(
        cmd.repo,
        targets=["target1", "target2"],
        a_rev="HEAD~10",
        b_rev="HEAD~1",
        recursive=True,
        all=True,
    )


def test_metrics_show_json_diff():
    assert _show_diff(
        {"metrics.json": {"a.b.c": {"old": 1, "new": 2, "diff": 3}}}
    ) == textwrap.dedent(
        """\
        Path          Metric    Value    Change
        metrics.json  a.b.c     2        3"""
    )


def test_metrics_show_raw_diff():
    assert _show_diff(
        {"metrics": {"": {"old": "1", "new": "2"}}}
    ) == textwrap.dedent(
        """\
        Path     Metric    Value    Change
        metrics            2        diff not supported"""
    )


def test_metrics_diff_no_diff():
    assert _show_diff(
        {"other.json": {"a.b.d": {"old": "old", "new": "new"}}}
    ) == textwrap.dedent(
        """\
        Path        Metric    Value    Change
        other.json  a.b.d     new      diff not supported"""
    )


def test_metrics_diff_no_changes():
    assert _show_diff({}) == ""


def test_metrics_diff_new_metric():
    assert _show_diff(
        {"other.json": {"a.b.d": {"old": None, "new": "new"}}}
    ) == textwrap.dedent(
        """\
        Path        Metric    Value    Change
        other.json  a.b.d     new      diff not supported"""
    )


def test_metrics_diff_deleted_metric():
    assert _show_diff(
        {"other.json": {"a.b.d": {"old": "old", "new": None}}}
    ) == textwrap.dedent(
        """\
        Path        Metric    Value    Change
        other.json  a.b.d     None     diff not supported"""
    )


def test_metrics_show(dvc, mocker):
    cli_args = parse_args(
        [
            "metrics",
            "show",
            "-R",
            "--all-tags",
            "--all-branches",
            "--all-commits",
            "target1",
            "target2",
        ]
    )
    assert cli_args.func == CmdMetricsShow

    cmd = cli_args.func(cli_args)
    m = mocker.patch("dvc.repo.metrics.show.show", return_value={})

    assert cmd.run() == 0

    m.assert_called_once_with(
        cmd.repo,
        ["target1", "target2"],
        recursive=True,
        all_tags=True,
        all_branches=True,
        all_commits=True,
    )


def test_metrics_diff_prec():
    assert _show_diff(
        {"other.json": {"a.b": {"old": 0.0042, "new": 0.0043, "diff": 0.0001}}}
    ) == textwrap.dedent(
        """\
        Path        Metric    Value    Change
        other.json  a.b       0.0043   0.0001"""
    )


def test_metrics_diff_sorted():
    assert _show_diff(
        {
            "metrics.yaml": {
                "x.b": {"old": 5, "new": 6, "diff": 1},
                "a.d.e": {"old": 3, "new": 4, "diff": 1},
                "a.b.c": {"old": 1, "new": 2, "diff": 1},
            }
        }
    ) == textwrap.dedent(
        """\
        Path          Metric    Value    Change
        metrics.yaml  a.b.c     2        1
        metrics.yaml  a.d.e     4        1
        metrics.yaml  x.b       6        1"""
    )


def test_metrics_diff_markdown_empty():
    assert _show_diff({}, markdown=True) == textwrap.dedent(
        """\
        | Path   | Metric   | Value   | Change   |
        |--------|----------|---------|----------|"""
    )


def test_metrics_diff_markdown():
    assert _show_diff(
        {
            "metrics.yaml": {
                "x.b": {"old": 5, "new": 6},
                "a.d.e": {"old": 3, "new": 4, "diff": 1},
                "a.b.c": {"old": 1, "new": 2, "diff": 1},
            }
        },
        markdown=True,
    ) == textwrap.dedent(
        """\
        | Path         | Metric   | Value   | Change             |
        |--------------|----------|---------|--------------------|
        | metrics.yaml | a.b.c    | 2       | 1                  |
        | metrics.yaml | a.d.e    | 4       | 1                  |
        | metrics.yaml | x.b      | 6       | diff not supported |"""
    )


def test_metrics_diff_no_path():
    assert _show_diff(
        {
            "metrics.yaml": {
                "x.b": {"old": 5, "new": 6, "diff": 1},
                "a.d.e": {"old": 3, "new": 4, "diff": 1},
                "a.b.c": {"old": 1, "new": 2, "diff": 1},
            }
        },
        no_path=True,
    ) == textwrap.dedent(
        """\
        Metric    Value    Change
        a.b.c     2        1
        a.d.e     4        1
        x.b       6        1"""
    )


def test_metrics_diff_with_old():
    assert _show_diff(
        {
            "metrics.yaml": {
                "x.b": {"old": 5, "new": 6, "diff": 1},
                "a.d.e": {"old": 3, "new": 4, "diff": 1},
                "a.b.c": {"old": 1, "new": 2, "diff": 1},
            }
        },
        old=True,
    ) == textwrap.dedent(
        """\
        Path          Metric    Old    New    Change
        metrics.yaml  a.b.c     1      2      1
        metrics.yaml  a.d.e     3      4      1
        metrics.yaml  x.b       5      6      1"""
    )