import itertools
import math
import unittest

from BaseClasses import ItemClassification
from .. import ItemData
from ..items import Group, ResourcePackData


class TestResourcePack(unittest.TestCase):

    def test_can_transform_resource_pack_data_into_idem_data(self):
        resource_pack = ResourcePackData("item name", 1, 1, ItemClassification.filler, frozenset())

        items = resource_pack.as_item_data(itertools.count())

        assert ItemData(0, "Resource Pack: 1 item name", ItemClassification.filler, {Group.RESOURCE_PACK}) in items
        assert ItemData(1, "Resource Pack: 2 item name", ItemClassification.filler, {Group.RESOURCE_PACK}) in items
        assert len(items) == 2

    def test_when_scale_quantity_then_generate_a_possible_quantity_from_minimal_scaling_to_double(self):
        resource_pack = ResourcePackData("item name", default_amount=4, scaling_factor=2)

        quantities = resource_pack.scale_quantity.items()

        assert (50, 2) in quantities
        assert (100, 4) in quantities
        assert (150, 6) in quantities
        assert (200, 8) in quantities
        assert len(quantities) == (4 / 2) * 2

    def test_given_scaling_not_multiple_of_default_amount_when_scale_quantity_then_double_is_added_at_200_scaling(self):
        resource_pack = ResourcePackData("item name", default_amount=5, scaling_factor=3)

        quantities = resource_pack.scale_quantity.items()

        assert (40, 2) in quantities
        assert (100, 5) in quantities
        assert (160, 8) in quantities
        assert (200, 10) in quantities
        assert len(quantities) == math.ceil(5 / 3) * 2

    def test_given_large_default_amount_multiple_of_scaling_factor_when_scale_quantity_then_scaled_amount_multiple(
            self):
        resource_pack = ResourcePackData("item name", default_amount=500, scaling_factor=50)

        quantities = resource_pack.scale_quantity.items()

        assert (10, 50) in quantities
        assert (20, 100) in quantities
        assert (30, 150) in quantities
        assert (40, 200) in quantities
        assert (50, 250) in quantities
        assert (60, 300) in quantities
        assert (70, 350) in quantities
        assert (80, 400) in quantities
        assert (90, 450) in quantities
        assert (100, 500) in quantities
        assert (110, 550) in quantities
        assert (120, 600) in quantities
        assert (130, 650) in quantities
        assert (140, 700) in quantities
        assert (150, 750) in quantities
        assert (160, 800) in quantities
        assert (170, 850) in quantities
        assert (180, 900) in quantities
        assert (190, 950) in quantities
        assert (200, 1000) in quantities
        assert len(quantities) == math.ceil(500 / 50) * 2

    def test_given_smallest_multiplier_possible_when_generate_resource_pack_name_then_quantity_is_not_0(self):
        resource_pack = ResourcePackData("item name", default_amount=10, scaling_factor=5)

        name = resource_pack.create_name_from_multiplier(1)

        assert name == "Resource Pack: 5 item name"