# Copyright 2020 Istvan Ruzman
# SPDX-License-Identifier: MIT OR Apache-2.0

from io import StringIO

import pytest
from pyrad3.dictionary import Dictionary, ParseError


@pytest.mark.parametrize(
    "filename", ["dictionaries/self_recursive", "dictionaries/mutual_recursive"]
)
def test_dictionary_recursion(filename):
    with pytest.raises(ParseError):
        Dictionary("tests/" + filename)


@pytest.mark.parametrize(
    "line",
    [
        "$INCLUDE",
        "BEGIN-VENDOR",
        "END-VENDOR",
        "VENDOR",
        "VENDOR NAME",
        "ATTRIBUTE",
        "ATTRIBUTE NAME",
        "VALUE",
        "VALUE ATTRNAME",
        "VALUE ATTRNAME VALUENAME",
    ],
)
def test_lines_missing_tokens(line):
    dictionary = StringIO(line)
    with pytest.raises(ParseError):
        Dictionary("", dictionary)


@pytest.mark.parametrize(
    "vendor",
    [
        "VENDOR test 1234",
        "VENDOR test 1234 format=1,1",
        "VENDOR test 1234 format=2,2",
        "VENDOR test 1234 format=1,2",
        "VENDOR test 1234 format=4,2",
        "VENDOR test 1234 format=4,0",
        "VENDOR WiMAX 1234 format=1,1,c",
    ],
)
def test_valid_vendor_definitions(vendor):
    dictionary = StringIO(vendor)
    Dictionary("", dictionary)


@pytest.mark.parametrize(
    "vendor",
    [
        "VENDOR test 1234 1,1",
        "VENDOR test 1234 format=3,1",
        "VENDOR test 1234 format=2",
        "VENDOR test 1234 format=1,2,c",
        "VENDOR test 1234 format=1,9",
        "VENDOR test 1234 format=4,4 suffix",
        "VENDOR test 1234 format=a,b suffix",
    ],
)
def test_invalid_vendor_definitions(vendor):
    dictionary = StringIO(vendor)
    with pytest.raises(ParseError):
        Dictionary("", dictionary)


@pytest.mark.parametrize(
    "number",
    [
        "ATTRIBUTE NAME 0x01   byte",
        "ATTRIBUTE NAME 0x0001 byte",
        "ATTRIBUTE NAME 0o123  byte",
        "ATTRIBUTE NAME 5      byte",
    ],
)
def test_valid_attribute_numbers(number):
    dictionary = StringIO(number)
    Dictionary("", dictionary)


@pytest.mark.parametrize(
    "number",
    [
        "ATTRIBUTE NAME 1234 byte",
        "ATTRIBUTE NAME ABCD byte",
        "ATTRIBUTE NAME -1 byte",
    ],
)
def test_invalid_attribute_numbers(number):
    dictionary = StringIO(number)
    with pytest.raises(ParseError):
        Dictionary("", dictionary)


@pytest.mark.parametrize("type_length", [1, 2, 4])
def test_attribute_number_limits(type_length):
    too_big = 2 ** (8 * type_length)
    max_value = too_big - 1
    dictionary = StringIO(
        f"VENDOR TEST 1234 format={type_length},1\n"
        "BEGIN-VENDOR TEST\n"
        f"ATTRIBUTE TEST {max_value} byte\n"
        "END-VENDOR TEST\n"
    )
    Dictionary("", dictionary)
    dictionary = StringIO(
        f"VENDOR TEST 1234 format={type_length},1\n"
        "BEGIN-VENDOR TEST\n"
        f"ATTRIBUTE TEST {too_big} byte\n"
        "END-VENDOR TEST\n"
    )
    with pytest.raises(ParseError):
        Dictionary("", dictionary)


@pytest.mark.parametrize(
    "value_definition",
    [
        "VALUE TEST-ATTRIBUTE TEST-VALUE 1",
        "VALUE TEST-ATTRIBUTE TEST-VALUE 0x1",
        "VALUE TEST-ATTRIBUTE TEST-VALUE 0o1",
    ],
)
def test_value_definition(value_definition):
    dictionary = StringIO(
        "\n".join(["ATTRIBUTE TEST-ATTRIBUTE 1 byte", value_definition])
    )
    Dictionary("", dictionary)


@pytest.mark.parametrize(
    "value_num, attr_type",
    [
        (0, "byte"),
        (255, "byte"),
        (0, "short"),
        (2 ** 16 - 1, "short"),
        (0, "integer"),
        (2 ** 32 - 1, "integer"),
        ((-(2 ** 31)), "signed"),
        (2 ** 31 - 1, "signed"),
        (0, "integer64"),
        (2 ** 64 - 1, "integer64"),
    ],
)
def test_value_number_within_limit(value_num, attr_type):
    dictionary = StringIO(
        "\n".join(
            [
                f"ATTRIBUTE TEST-ATTRIBUTE 1 {attr_type}",
                f"VALUE TEST-ATTRIBUTE TEST-VALUE {value_num}",
            ]
        )
    )
    Dictionary("", dictionary)


@pytest.mark.parametrize(
    "value_num, attr_type",
    [
        (-1, "byte"),
        (256, "byte"),
        (-1, "short"),
        (2 ** 16, "short"),
        (-1, "integer"),
        (2 ** 32, "integer"),
        (2 ** 31, "signed"),
        ((-(2 ** 31)) - 1, "signed"),
        (-1, "integer64"),
        (2 ** 64, "integer64"),
    ],
)
def test_value_number_out_of_limit(value_num, attr_type):
    dictionary = StringIO(
        "\n".join(
            [
                f"ATTRIBUTE TEST-ATTRIBUTE 1 {attr_type}",
                f"VALUE TEST-ATTRIBUTE TEST-VALUE {value_num}",
            ]
        )
    )
    with pytest.raises(ParseError):
        Dictionary("", dictionary)