# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
A fake model with multiple FC layers to test CINN on a more complex model.
"""
import numpy
import sys, os
import numpy as np
import paddle
import paddle.fluid as fluid
from paddle.fluid.backward import append_backward

size = 2
num_layers = 4
paddle.enable_static()

a = fluid.layers.data(name="A", shape=[-1, size], dtype='float32')
label = fluid.layers.data(name="label", shape=[size], dtype='float32')

fc_out = fluid.layers.fc(input=a,
                         size=size,
                         act="relu",
                         bias_attr=fluid.ParamAttr(name="fc_bias"),
                         num_flatten_dims=1)

for i in range(num_layers - 1):
    fc_out = fluid.layers.fc(input=fc_out,
                             size=size,
                             act="relu",
                             bias_attr=fluid.ParamAttr(name="fc_bias"),
                             num_flatten_dims=1)

cost = fluid.layers.square_error_cost(fc_out, label)
avg_cost = fluid.layers.mean(cost)

optimizer = fluid.optimizer.SGD(learning_rate=0.001)
optimizer.minimize(avg_cost)

cpu = fluid.core.CPUPlace()
loss = exe = fluid.Executor(cpu)

exe.run(fluid.default_startup_program())

fluid.io.save_inference_model("./multi_fc_model", [a.name], [fc_out], exe)
print('output name', fc_out.name)