#   Copyright (c) 2018 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.

from __future__ import print_function

import paddle
import paddle.fluid as fluid
import sys
try:
    from paddle.fluid.contrib.trainer import *
    from paddle.fluid.contrib.inferencer import *
except ImportError:
    print(
        "In the fluid 1.0, the trainer and inferencer are moving to paddle.fluid.contrib",
        file=sys.stderr)
    from paddle.fluid.trainer import *
    from paddle.fluid.inferencer import *
import numpy as np

WORD_DICT, VERB_DICT, LABEL_DICT = paddle.dataset.conll05.get_dict()
WORD_DICT_LEN = len(WORD_DICT)
LABEL_DICT_LEN = len(LABEL_DICT)
PRED_DICT_LEN = len(VERB_DICT)
MARK_DICT_LEN = 2
IS_SPARSE = True
BATCH_SIZE = 10
EMBEDDING_NAME = 'emb'


def lstm_net():
    WORD_DIM = 32
    MARK_DIM = 5
    HIDDEN_DIM = 512
    DEPTH = 8

    # Data definitions
    word = fluid.layers.data(
        name='word_data', shape=[1], dtype='int64', lod_level=1)
    predicate = fluid.layers.data(
        name='verb_data', shape=[1], dtype='int64', lod_level=1)
    ctx_n2 = fluid.layers.data(
        name='ctx_n2_data', shape=[1], dtype='int64', lod_level=1)
    ctx_n1 = fluid.layers.data(
        name='ctx_n1_data', shape=[1], dtype='int64', lod_level=1)
    ctx_0 = fluid.layers.data(
        name='ctx_0_data', shape=[1], dtype='int64', lod_level=1)
    ctx_p1 = fluid.layers.data(
        name='ctx_p1_data', shape=[1], dtype='int64', lod_level=1)
    ctx_p2 = fluid.layers.data(
        name='ctx_p2_data', shape=[1], dtype='int64', lod_level=1)
    mark = fluid.layers.data(
        name='mark_data', shape=[1], dtype='int64', lod_level=1)

    # 8 features
    predicate_embedding = fluid.layers.embedding(
        input=predicate,
        size=[PRED_DICT_LEN, WORD_DIM],
        dtype='float32',
        is_sparse=IS_SPARSE,
        param_attr='vemb')

    mark_embedding = fluid.layers.embedding(
        input=mark,
        size=[MARK_DICT_LEN, MARK_DIM],
        dtype='float32',
        is_sparse=IS_SPARSE)

    word_input = [word, ctx_n2, ctx_n1, ctx_0, ctx_p1, ctx_p2]
    emb_layers = [
        fluid.layers.embedding(
            size=[WORD_DICT_LEN, WORD_DIM],
            input=x,
            param_attr=fluid.ParamAttr(name=EMBEDDING_NAME))