from __future__ import annotations

import pytest
from vtkmodules.vtkCommonCore import vtkLookupTable

import pyvista as pv
from pyvista.plotting.composite_mapper import BlockAttributes
from pyvista.plotting.composite_mapper import CompositePolyDataMapper


@pytest.fixture
def composite_mapper(multiblock_poly):
    pl = pv.Plotter()
    actor, mapper = pl.add_composite(multiblock_poly)
    return mapper


@pytest.fixture
def block_attributes(composite_mapper):
    return composite_mapper.block_attr


@pytest.fixture
def block_attr(block_attributes):
    return block_attributes[0]


def test_basic_mapper(composite_mapper):
    assert isinstance(composite_mapper, CompositePolyDataMapper)
    assert isinstance(composite_mapper.dataset, pv.MultiBlock)


def test_interpolate_before_map(composite_mapper):
    assert isinstance(composite_mapper.interpolate_before_map, bool)


def test_color_missing_with_nan(composite_mapper):
    assert isinstance(composite_mapper.color_missing_with_nan, bool)


def test_lookup_table(composite_mapper):
    isinstance(composite_mapper.lookup_table, vtkLookupTable)

    table = vtkLookupTable()
    composite_mapper.lookup_table = table
    assert composite_mapper.lookup_table is table


def test_scalar_visibility(composite_mapper):
    isinstance(composite_mapper.scalar_visibility, bool)


def test_scalar_map_mode(composite_mapper):
    isinstance(composite_mapper.scalar_map_mode, str)
    with pytest.raises(ValueError, match='Invalid `scalar_map_mode`'):
        composite_mapper.scalar_map_mode = 'foo'


@pytest.mark.parametrize(
    'value',
    ['default', 'point', 'cell', 'point_field', 'cell_field', 'field'],
)
def test_scalar_map_mode_values(value, composite_mapper):
    composite_mapper.scalar_map_mode = value
    assert composite_mapper.scalar_map_mode == value


def test_composite_mapper_non_poly(multiblock_all):
    # should run without raising
    pl = pv.Plotter()
    actor, mapper = pl.add_composite(multiblock_all)


def test_block_attr(block_attributes):
    block = block_attributes[0]
    assert isinstance(block, BlockAttributes)
    with pytest.raises(KeyError, match='Invalid block key'):
        block_attributes[-1]
    with pytest.raises(KeyError, match='out of bounds'):
        block_attributes[100000]
    with pytest.raises(TypeError):
        block_attributes[0.5]


def test_block_attr_get_item_(multiblock_poly):
    """Verify flat indexing is correct."""
    block_b = multiblock_poly.copy()
    block_c = multiblock_poly.copy()
    block_a = pv.MultiBlock([block_b, block_c])
    pl = pv.Plotter()
    actor, mapper = pl.add_composite(block_a)
    assert len(mapper.block_attr) == len(block_b) + len(block_c) + 3
    with pytest.raises(KeyError):
        mapper.block_attr[len(mapper.block_attr)]


def test_visible(block_attr):
    assert block_attr.visible is None

    visible = True
    block_attr.visible = visible
    assert block_attr.visible is visible

    block_attr.visible = None
    assert block_attr.visible is None


def test_opacity(block_attr):
    # unset must be none
    assert block_attr.opacity is None

    opacity = 0.5
    block_attr.opacity = opacity
    assert block_attr.opacity == opacity

    block_attr.opacity = None
    assert block_attr.opacity is None


def test_color(block_attr):
    # when unset this must be None
    assert block_attr.color is None

    color = 'red'
    block_attr.color = color
    assert block_attr.color == pv.Color(color).float_rgb

    color = (1, 1, 0)
    block_attr.color = color
    assert block_attr.color == pv.Color(color).float_rgb

    block_attr.color = None
    assert block_attr.color is None


def test_attr_repr(block_attr):
    block_attr.visible = True
    block_attr.opacity = 0.9
    block_attr.color = 'blue'
    block_attr.pickable = False

    repr_ = repr(block_attr)
    assert 'True' in repr_
    assert 'False' in repr_
    assert 'blue' in repr_
    assert '0.9' in repr_


def test_block_attributes(block_attributes):
    color = (1.0, 1.0, 1.0)
    pickable = False
    opacity = 0.5
    visible = False
    block_attributes[0].color = color
    block_attributes[0].pickable = pickable
    block_attributes[0].opacity = opacity
    block_attributes[0].visible = visible

    assert block_attributes[0].color == color
    assert block_attributes[0].pickable == pickable
    assert block_attributes[0].opacity == opacity
    assert block_attributes[0].visible == visible

    block_attributes[0].pickable = None
    assert block_attributes[0].pickable is None
    block_attributes[0].pickable = True

    block_attributes.reset_colors()
    assert block_attributes[0].color is None

    block_attributes.reset_pickabilities()
    assert block_attributes[0].pickable is None

    block_attributes.reset_opacities()
    assert block_attributes[0].opacity is None

    block_attributes.reset_visibilities()
    assert block_attributes[0].visible is None