# Copyright (c) OpenMMLab. All rights reserved.
from __future__ import division

import mmcv
import torch

from mmdeploy.utils import Backend
from mmdeploy.utils.test import check_backend, get_rewrite_outputs


def test_multiheadattention_ncnn():
    check_backend(Backend.NCNN)
    from mmcv.cnn.bricks.transformer import MultiheadAttention
    embed_dims, num_heads = 12, 2
    model = MultiheadAttention(embed_dims, num_heads, batch_first=True)
    model.eval()
    query = torch.rand(1, 3, embed_dims)

    deploy_cfg = mmcv.Config(
        dict(
            onnx_config=dict(input_shape=None),
            backend_config=dict(type=Backend.NCNN.value),
        ))
    model_outputs = model(query)
    rewrite_inputs = dict(query=query)
    rewrite_outputs, is_backend_output = get_rewrite_outputs(
        wrapped_model=model,
        model_inputs=rewrite_inputs,
        deploy_cfg=deploy_cfg,
        run_with_backend=True)
    if is_backend_output is None:
        assert rewrite_outputs is not None
    else:
        assert torch.allclose(
            model_outputs, rewrite_outputs[0], rtol=1e-03, atol=1e-05)


def test_context_block_ncnn():
    check_backend(Backend.NCNN)
    from mmcv.cnn.bricks.context_block import ContextBlock
    out_channels = 80
    ratio = 0.2
    test_input = torch.rand([1, 80, 64, 48])

    model = ContextBlock(out_channels, ratio)

    deploy_cfg = mmcv.Config(
        dict(
            onnx_config=dict(input_shape=None),
            backend_config=dict(type=Backend.NCNN.value),
        ))

    model_outputs = model(test_input)

    rewrite_inputs = dict(x=test_input)
    rewrite_outputs, is_backend_output = get_rewrite_outputs(
        wrapped_model=model,
        model_inputs=rewrite_inputs,
        deploy_cfg=deploy_cfg,
        run_with_backend=True)
    if is_backend_output is None:
        assert rewrite_outputs is not None
    else:
        assert torch.allclose(
            model_outputs, rewrite_outputs[0], rtol=1e-03, atol=1e-05)


def test_hsigmoid_ncnn():
    check_backend(Backend.NCNN)
    from mmcv.cnn.bricks.hsigmoid import HSigmoid
    bias = 1.0
    divisor = 2.0
    min_value = 0.0
    max_value = 1.0

    model = HSigmoid(bias, divisor, min_value, max_value)
    deploy_cfg = mmcv.Config(
        dict(
            onnx_config=dict(input_shape=None),
            backend_config=dict(type=Backend.NCNN.value),
        ))

    test_inputs = torch.rand(1, 6, 1, 1)
    model_outputs = model(test_inputs)

    rewrite_inputs = dict(x=test_inputs)
    rewrite_outputs, is_backend_output = get_rewrite_outputs(
        wrapped_model=model,
        model_inputs=rewrite_inputs,
        deploy_cfg=deploy_cfg,
        run_with_backend=True)
    if is_backend_output is None:
        assert rewrite_outputs is not None
    else:
        assert torch.allclose(
            model_outputs, rewrite_outputs[0], rtol=1e-03, atol=1e-05)


def test_hswish_ncnn():
    check_backend(Backend.NCNN)
    from mmcv.cnn.bricks.hswish import HSwish

    model = HSwish()

    deploy_cfg = mmcv.Config(
        dict(
            onnx_config=dict(input_shape=None),
            backend_config=dict(type=Backend.NCNN.value),
        ))

    test_inputs = torch.rand([1, 16, 4, 4])
    model_outputs = model(test_inputs)

    rewrite_inputs = dict(x=test_inputs)
    rewrite_outputs, is_backend_output = get_rewrite_outputs(
        wrapped_model=model,
        model_inputs=rewrite_inputs,
        deploy_cfg=deploy_cfg,
        run_with_backend=True)
    if is_backend_output is None:
        assert rewrite_outputs is not None
    else:
        assert torch.allclose(
            model_outputs, rewrite_outputs[0], rtol=1e-03, atol=1e-05)