# Copyright (C) 2018-2026 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

from sys import platform

import pytest

from pytorch_layer_test_class import PytorchLayerTest


class TestUpsample1D(PytorchLayerTest):
    def _prepare_input(self):
        return (self.random.randn(1, 3, 224),)

    def create_model(self, size, scale, mode):
        import torch
        import torch.nn.functional as F

        class aten_upsample(torch.nn.Module):
            def __init__(self, size, scale, mode):
                super().__init__()
                self.size = size
                self.scale = scale
                self.mode = mode

            def forward(self, x):
                return F.interpolate(x, self.size, scale_factor=self.scale, mode=self.mode)


        return aten_upsample(size, scale, mode), F"aten::upsample_{mode}1d"

    @pytest.mark.parametrize("mode,size,scale", [
        ('nearest', 300, None),
        ('nearest', 200, None),
        ('nearest', None, 2.5),
        ('nearest', None, 0.75),
        ('linear', 300, None),
        ('linear', 200, None),
        ('linear', None, 2.5,),
        ('linear', None, 0.75),
    ])
    @pytest.mark.nightly
    @pytest.mark.precommit
    @pytest.mark.precommit_torch_export
    @pytest.mark.skipif(platform == 'darwin', reason="Ticket - 122182")
    def test_upsample1d(self, mode, size, scale, ie_device, precision, ir_version):
        if ie_device == "GPU" and mode == "linear":
            pytest.xfail(reason="1D linear upsample is unsupported on GPU")
        self._test(*self.create_model(size, scale, mode), ie_device,
                   precision, ir_version, trace_model=True)


class TestUpsample2D(PytorchLayerTest):
    def _prepare_input(self):
        return (self.random.randn(1, 3, 200, 200),)

    def create_model(self, size, scale, mode):
        import torch
        import torch.nn.functional as F

        class aten_upsample(torch.nn.Module):
            def __init__(self, size, scale, mode):
                super().__init__()
                self.size = size
                self.scale = scale
                self.mode = mode

            def forward(self, x):
                return F.interpolate(x, self.size, scale_factor=self.scale, mode=self.mode)


        return aten_upsample(size, scale, mode), F"aten::upsample_{mode}2d"

    @pytest.mark.parametrize("mode,size,scale", [
        ('nearest', 300, None),
        ('nearest', 150, None),
        ('nearest', (300, 400), None),
        ('nearest', None, 2.5),
        ('nearest', None, 0.75),
        ('nearest', None, (1.5, 2)),
        ('bilinear', 300, None),
        ('bilinear', 150, None),
        ('bilinear', (400, 480), None),
        ('bilinear', None, 2.5,),
        ('bilinear', None, 0.75),
        ('bilinear', None, (1.2, 1.3)),
        ('bicubic', 300, None),
        ('bicubic', 150, None),
        ('bicubic', (400, 480), None),
        ('bicubic', None, 2.5,),
        ('bicubic', None, 0.75),
        ('bicubic', None, (1.2, 1.3))
    ])
    @pytest.mark.nightly
    @pytest.mark.precommit
    @pytest.mark.precommit_torch_export
    def test_upsample2d(self, mode, size, scale, ie_device, precision, ir_version):
        self._test(*self.create_model(size, scale, mode), ie_device,
                   precision, ir_version, trace_model=True, **{"custom_eps": 1e-3})


class TestUpsample2DAntialias(PytorchLayerTest):
    def _prepare_input(self):
        return (self.random.randn(1, 3, 200, 200),)

    def create_model(self, size, scale, mode):
        import torch
        import torch.nn.functional as F

        class aten_upsample(torch.nn.Module):
            def __init__(self, size, scale, mode):
                super().__init__()
                self.size = size
                self.scale = scale
                self.mode = mode

            def forward(self, x):
                return F.interpolate(x, self.size, scale_factor=self.scale, mode=self.mode, antialias=True)


        return aten_upsample(size, scale, mode), F"aten::_upsample_{mode}2d_aa"

    @pytest.mark.parametrize("mode,size,scale", [
        ('bilinear', 300, None),
        ('bilinear', 150, None),
        ('bilinear', (400, 480), None),
        ('bilinear', None, 2.5,),
        ('bilinear', None, 0.75),
        ('bilinear', None, (1.2, 1.3)),
        ('bicubic', 300, None),
        ('bicubic', 150, None),
        ('bicubic', (400, 480), None),
        ('bicubic', None, 2.5,),
        ('bicubic', None, 0.75),
        ('bicubic', None, (1.2, 1.3))
    ])
    @pytest.mark.nightly
    @pytest.mark.precommit
    def test_upsample2d(self, mode, size, scale, ie_device, precision, ir_version):
        self._test(*self.create_model(size, scale, mode), ie_device,
                   precision, ir_version, trace_model=True, **{"custom_eps": 1e-3})


class TestUpsample3D(PytorchLayerTest):
    def _prepare_input(self):
        return (self.random.randn(1, 3, 100, 100, 100),)

    def create_model(self, size, scale, mode):
        import torch
        import torch.nn.functional as F

        class aten_upsample(torch.nn.Module):
            def __init__(self, size, scale, mode):
                super().__init__()
                self.size = size
                self.scale = scale
                self.mode = mode

            def forward(self, x):
                return F.interpolate(x, self.size, scale_factor=self.scale, mode=self.mode)


        return aten_upsample(size, scale, mode), F"aten::upsample_{mode}3d"

    @pytest.mark.parametrize("mode,size,scale", [
        ('nearest', 200, None),
        ('nearest', 150, None),
        ('nearest', (150, 200, 250), None),
        ('nearest', None, 2.5),
        ('nearest', None, 0.75),
        ('nearest', None, (1.5, 2, 2.5)),
        ('trilinear', 200, None),
        ('trilinear', 150, None),
        ('trilinear', (200, 240, 210), None),
        ('trilinear', None, 2.5,),
        ('trilinear', None, 0.75),
        ('trilinear', None, (1.2, 1.1, 1.5)),
    ])
    @pytest.mark.nightly
    @pytest.mark.precommit
    @pytest.mark.precommit_torch_export
    @pytest.mark.precommit_fx_backend
    def test_upsample3d(self, mode, size, scale, ie_device, precision, ir_version):
        self._test(*self.create_model(size, scale, mode), ie_device,
                   precision, ir_version, trace_model=True, **{"custom_eps": 1e-3})


class TestUpsample2DListSizes(PytorchLayerTest):
    def _prepare_input(self):
        return (self.random.randn(1, 3, 200, 200),)

    def create_model(self, mode):
        import torch
        import torch.nn.functional as F

        class aten_upsample(torch.nn.Module):
            def __init__(self, mode):
                super().__init__()
                self.mode = mode

            def forward(self, x):
                return F.interpolate(x, size=x.shape[-2:], mode=self.mode)


        return aten_upsample(mode), F"aten::upsample_{mode}2d"

    @pytest.mark.parametrize("mode", ['nearest', 'bilinear', 'bicubic'])
    @pytest.mark.nightly
    @pytest.mark.precommit
    @pytest.mark.precommit_torch_export
    def test_upsample2d_list_sizes(self, mode, ie_device, precision, ir_version):
        self._test(*self.create_model(mode), ie_device,
                   precision, ir_version, trace_model=True)


class TestUpsampleScripted(PytorchLayerTest):
    def _prepare_input(self):
        return (self.random.randn(1, 3, 200, 200),)

    def create_model(self):
        import torch.nn as nn

        class TestModel(nn.Module):
            def __init__(self, n_channels, n_classes):
                super().__init__()
                self.n_channels = n_channels
                self.n_classes = n_classes

                self.cv1 = nn.Conv2d(n_channels, 16, kernel_size=3, padding=1)
                self.mp1 = nn.MaxPool2d((2, 2), (2, 2))
                self.up = nn.Upsample(scale_factor=2.)

            def forward(self, x):
                x1 = self.cv1(x)
                x2 = self.mp1(x1)
                x3 = self.up(x2)
                return x3

        return TestModel(1, 3), ["prim::If", "aten::upsample_nearest1d", "aten::upsample_nearest2d", "aten::upsample_nearest3d"]

    @pytest.mark.nightly
    @pytest.mark.precommit
    @pytest.mark.xfail(reason="Scripted upsample is not supported")
    def test_upsample_scripted(self, ie_device, precision, ir_version):
        self._test(*self.create_model(), ie_device,
                   precision, ir_version, trace_model=False)
