# SPDX-License-Identifier: BSD-2-Clause
""" Unit tests for the rtemsqual.items module. """

# Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
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import os
import pytest

from rtemsqual.items import Item, ItemCache, Link


class EmptyCache(ItemCache):
    def __init__(self):
        return


def test_to_abs_uid():
    item = Item(EmptyCache(), "/x/y", {})
    assert item.to_abs_uid(".") == "/x/y"
    assert item.to_abs_uid("z") == "/x/z"
    assert item.to_abs_uid("/z") == "/z"
    assert item.to_abs_uid("../z") == "/z"
    assert item.to_abs_uid("../../z") == "/z"


def test_uid():
    item = Item(EmptyCache(), "x", {})
    assert item.uid == "x"


def test_contains():
    data = {}
    data["x"] = "y"
    item = Item(EmptyCache(), "z", data)
    assert "x" in item
    assert "a" not in item


def test_get_key_path():
    data = {}
    data["a"] = {"b": "c", "d": [1, 2, 3]}
    data["x"] = "y"
    item = Item(EmptyCache(), "z", data)
    assert item.get_by_key_path("x") == "y"
    assert item.get_by_key_path("a/d[2]") == 3
    assert item.get_by_key_path("a/b/../d[0]") == 1
    assert item.get_by_key_path("/a/b/../d[0]") == 1
    assert item.get_by_key_path("../d[0]", "a/b") == 1
    with pytest.raises(KeyError):
        assert item.get_by_key_path("y")
    with pytest.raises(ValueError):
        assert item.get_by_key_path("[")
    with pytest.raises(ValueError):
        assert item.get_by_key_path("x[y]")


def test_getitem():
    data = {}
    data["x"] = "y"
    item = Item(EmptyCache(), "z", data)
    assert item["x"] == "y"


def test_get():
    data = {}
    data["x"] = "y"
    item = Item(EmptyCache(), "z", data)
    assert item.get("x", "z") == "y"
    assert item.get("z", "a") == "a"


def test_children():
    child = Item(EmptyCache(), "c", {})
    parent = Item(EmptyCache(), "p", {})
    parent.add_link_to_child(Link(child, {"a": "b", "role": "c"}))
    children = [item for item in parent.children()]
    assert len(children) == 1
    assert children[0] == child
    links = [link for link in parent.links_to_children()]
    assert len(links) == 1
    assert links[0].item == child
    assert links[0]["a"] == "b"
    assert links[0].role == "c"


def _is_enabled(enabled, enabled_by):
    item = Item(EmptyCache(), "i", {"enabled-by": enabled_by})
    return item.is_enabled(enabled)


def test_is_enabled():
    assert _is_enabled([], None)
    assert _is_enabled([], [])
    assert not _is_enabled([], ["A"])
    assert _is_enabled(["A"], "A")
    assert not _is_enabled(["B"], "A")
    assert _is_enabled(["A"], ["A"])
    assert not _is_enabled(["B"], ["A"])
    assert _is_enabled(["A"], ["A", "B"])
    assert _is_enabled(["B"], ["A", "B"])
    assert not _is_enabled(["C"], ["A", "B"])
    assert not _is_enabled(["A"], {"not": "A"})
    assert _is_enabled(["B"], {"not": "A"})
    assert not _is_enabled(["A"], {"and": ["A", "B"]})
    assert _is_enabled(["A", "B"], {"and": ["A", "B"]})
    assert _is_enabled(["A", "B", "C"], {"and": ["A", "B"]})
    assert _is_enabled(["A", "B"], {"and": ["A", "B", {"not": "C"}]})
    assert not _is_enabled(["A", "B", "C"], {"and": ["A", "B", {"not": "C"}]})
    assert not _is_enabled(["A"], {"and": "A", "x": "y"})
    assert not _is_enabled(["A"], {"x": "A"})
    assert _is_enabled([], {"not": {"and": ["A", {"not": "A"}]}})


def test_save_and_load(tmpdir):
    item_file = os.path.join(tmpdir, "i.yml")
    item = Item(EmptyCache(), "i", {"k": "v"})
    item.file = item_file
    assert item.file == item_file
    item.save()
    with open(item_file, "r") as src:
        assert src.read() == "k: v\n"
    assert item.file == item_file

    item2 = Item(EmptyCache(), "i2", {})
    item2.file = item_file
    with pytest.raises(KeyError):
        item2["k"]
    item2.load()
    assert item2["k"] == "v"
    assert item.file == item_file