#   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 traceback
import math
import collections

import six
import unittest
import numpy as np

import gc

gc.set_debug(gc.DEBUG_COLLECTABLE)

import paddle.fluid as fluid


class TranspilerTest(unittest.TestCase):

    def setUp(self):
        self.trainer_id = 0
        self.trainers = 2
        self.pservers = 2
        # NOTE: we do not actually bind this port
        self.pserver_eps = "127.0.0.1:6174,127.0.0.1:6175"
        self.pserver1_ep = "127.0.0.1:6174"
        self.pserver2_ep = "127.0.0.1:6175"
        self.sync_mode = True
        self.transpiler = None

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.1)
        sgd_optimizer.minimize(avg_cost)

    def get_main_program(self):
        main = fluid.Program()
        main.random_seed = 1
        with fluid.program_guard(main):
            self.net_conf()
        self.origin_prog = main.clone()
        return main

    def get_trainer(self, config=None, sync_mode=True):
        src = fluid.default_startup_program().clone()

        t = self._transpiler_instance(config, sync_mode=True)

        trainer_main = t.get_trainer_program(wait_port=False)
        trainer_startup = fluid.default_startup_program()

        assert (src.num_blocks == 1)
        assert (trainer_startup.num_blocks == src.num_blocks)

        return trainer_main, trainer_startup

    def get_pserver(self, ep, config=None, sync_mode=True):
        t = self._transpiler_instance(config, sync_mode)
        pserver = t.get_pserver_program(ep)
        startup = t.get_startup_program(ep, pserver)
        return pserver, startup

    def _transpiler_instance(self, config=None, sync_mode=True):
        if not self.transpiler:
            main = self.get_main_program()
            self.transpiler = fluid.DistributeTranspiler(config=config)
            self.transpiler.transpile(self.trainer_id,
                                      program=main,
                                      pservers=self.pserver_eps,
                                      trainers=self.trainers,
                                      sync_mode=sync_mode)

        return self.transpiler

    def transpiler_test_impl(self):
        pass

    def test_transpiler(self):
        main = fluid.Program()
        startup = fluid.Program()
        with fluid.unique_name.guard():
            with fluid.program_guard(main, startup):
                self.transpiler_test_impl()
        # NOTE: run gc.collect to eliminate pybind side objects to
        # prevent random double-deallocate when inherited in python.
        del self.transpiler
        del main
        del startup
        gc.collect()


class TestBasicModel(TranspilerTest):

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        pserver2, startup2 = self.get_pserver(self.pserver2_ep)

        trainer, trainer_startup = self.get_trainer()

        # split var blocks should be in startup program
        self.assertTrue("fc_w.block0" in trainer_startup.global_block().vars)
        self.assertTrue("fc_w.block1" in trainer_startup.global_block().vars)
        self.assertTrue("fc_w" in trainer_startup.global_block().vars)
        self.assertTrue("fc_b" in trainer_startup.global_block().vars)
        self.assertTrue("fc_w@GRAD" not in trainer_startup.global_block().vars)
        self.assertTrue("fc_b@GRAD" not in trainer_startup.global_block().vars)

        src = [op.type for op in trainer_startup.global_block().ops]
        dst = ['fill_constant', 'fill_constant', 'uniform_random', 'recv', 'recv', \
               'fetch_barrier', 'concat']

        self.assertEqual(src, dst)

        self.assertEqual([op.type for op in trainer.global_block().ops], [
            'mul', 'elementwise_add', 'elementwise_sub', 'square', 'mean',
            'fill_constant', 'mean_grad', 'square_grad', 'elementwise_sub_grad',
            'elementwise_add_grad', 'send', 'mul_grad', 'split_byref', 'send',
            'send_barrier', 'recv', 'recv', 'fetch_barrier', 'concat'
        ])

        self.assertEqual(len(pserver.blocks), 3)
        # block0: listen_and_serv
        self.assertEqual([op.type for op in pserver.blocks[0].ops],
                         ["listen_and_serv"])
        # block1~2: optimize pass
        self.assertEqual([op.type for op in pserver.blocks[1].ops],
                         ["sum", "scale", "sgd"])
        # confirm startup program
        self.assertEqual([op.type for op in startup.global_block().ops],
                         ["fill_constant", "fill_constant", "uniform_random"])
        # the variable #fc_w will be split into two blocks
        fc_w_var = startup.global_block().var("fc_w.block1")
        self.assertEqual(fc_w_var.shape, (500, 1000))
        # all parameters should be optimized on pserver

        pserver_params = []
        for prog in [pserver, pserver2]:
            for blk in prog.blocks:
                for op in blk.ops:
                    if "Param" in op.input_names:
                        param_name = op.input("Param")[0]
                        is_block_idx = param_name.find(".block")
                        if is_block_idx != -1:
                            origin_param_name = param_name[:is_block_idx]
                        else:
                            origin_param_name = param_name
                        pserver_params.append(origin_param_name)
        trainer_params = []
        for op in self.origin_prog.global_block().ops:
            if "Param" in op.input_names:
                trainer_params.append(op.input("Param")[0])
        self.assertEqual(set(pserver_params), set(trainer_params))


class TestBasicModelWithLargeBlockSize(TranspilerTest):

    def transpiler_test_impl(self):
        config = fluid.DistributeTranspilerConfig()
        config.min_block_size = 1048576

        pserver, startup = self.get_pserver(self.pserver1_ep, config)
        pserver2, startup2 = self.get_pserver(self.pserver2_ep, config)

        trainer, _ = self.get_trainer(config)

        self.assertEqual([op.type for op in trainer.global_block().ops], [
            'mul', 'elementwise_add', 'elementwise_sub', 'square', 'mean',
            'fill_constant', 'mean_grad', 'square_grad', 'elementwise_sub_grad',
            'elementwise_add_grad', 'send', 'mul_grad', 'send', 'send_barrier',
            'recv', 'recv', 'fetch_barrier'
        ])

        self.assertEqual(len(pserver.blocks), 2)
        # block0: listen_and_serv
        self.assertEqual([op.type for op in pserver.blocks[0].ops],
                         ["listen_and_serv"])
        # block1~2: optimize pass
        self.assertEqual([op.type for op in pserver.blocks[1].ops],
                         ["sum", "scale", "sgd"])
        # confirm startup program
        self.assertEqual([op.type for op in startup.global_block().ops],
                         ["fill_constant", "fill_constant"])
        # the variable #fc_w will be split into two blocks
        fc_w_var = startup2.global_block().var("fc_w")
        self.assertEqual(fc_w_var.shape, (1000, 1000))
        # all parameters should be optimized on pserver

        pserver_params = []
        for prog in [pserver, pserver2]:
            for blk in prog.blocks:
                for op in blk.ops:
                    if "Param" in op.input_names:
                        param_name = op.input("Param")[0]
                        is_block_idx = param_name.find(".block")
                        if is_block_idx != -1:
                            origin_param_name = param_name[:is_block_idx]
                        else:
                            origin_param_name = param_name
                        pserver_params.append(origin_param_name)
        trainer_params = []
        for op in self.origin_prog.global_block().ops:
            if "Param" in op.input_names:
                trainer_params.append(op.input("Param")[0])
        self.assertEqual(set(pserver_params), set(trainer_params))


class TestNoSliceVar(TranspilerTest):

    def setUp(self):
        super(TestNoSliceVar, self).setUp()

    def transpiler_test_impl(self):
        config = fluid.DistributeTranspilerConfig()
        config.slice_var_up = False

        _, startup = self.get_pserver(self.pserver1_ep, config)
        _, startup2 = self.get_pserver(self.pserver2_ep, config)

        if "fc_w" in startup.global_block().vars:
            fc_w_var = startup.global_block().vars["fc_w"]
        elif "fc_w" in startup2.global_block().vars:
            fc_w_var = startup2.global_block().vars["fc_w"]

        self.assertEqual(fc_w_var.shape, (1000, 1000))


class TestLRDecay(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        sgd_optimizer = fluid.optimizer.SGD(
            learning_rate=fluid.layers.exponential_decay(learning_rate=1.0,
                                                         decay_steps=2100,
                                                         decay_rate=0.1,
                                                         staircase=True))
        sgd_optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        trainer, _ = self.get_trainer()

        self.assertEqual(len(pserver.blocks), 4)
        lr_decay_ops = [op.type for op in pserver.blocks[1].ops]
        self.assertEqual(lr_decay_ops, [
            "increment", "cast", "fill_constant", "elementwise_div", "floor",
            "fill_constant", "elementwise_pow", "fill_constant",
            "elementwise_mul"
        ])


class TestFakeInit(TranspilerTest):

    def net_conf(self):
        dict_size, embedding_size, neg_num = 10000, 8, 5

        input_word = fluid.layers.data(name="input_word",
                                       shape=[1],
                                       dtype='int64',
                                       lod_level=1)
        true_word = fluid.layers.data(name='true_label',
                                      shape=[1],
                                      dtype='int64',
                                      lod_level=1)
        neg_word = fluid.layers.data(name="neg_label",
                                     shape=[1],
                                     dtype='int64',
                                     lod_level=1)
        inputs = [input_word, true_word, neg_word]

        init_width = 0.5 / embedding_size
        input_emb = fluid.layers.embedding(
            input=inputs[0],
            is_sparse=True,
            size=[dict_size, embedding_size],
            param_attr=fluid.ParamAttr(name='emb',
                                       initializer=fluid.initializer.Uniform(
                                           -init_width, init_width)))

        true_emb_w = fluid.layers.embedding(
            input=inputs[1],
            is_sparse=True,
            size=[dict_size, embedding_size],
            param_attr=fluid.ParamAttr(
                name='emb_w',
                initializer=fluid.initializer.Constant(value=0.0)))

        true_emb_b = fluid.layers.embedding(
            input=inputs[1],
            is_sparse=True,
            size=[dict_size, 1],
            param_attr=fluid.ParamAttr(
                name='emb_b',
                initializer=fluid.initializer.Constant(value=0.0)))

        neg_word_reshape = fluid.layers.reshape(inputs[2], shape=[-1, 1])
        neg_word_reshape.stop_gradient = True

        neg_emb_w = fluid.layers.embedding(input=neg_word_reshape,
                                           is_sparse=True,
                                           size=[dict_size, embedding_size],
                                           param_attr=fluid.ParamAttr(
                                               name='emb_w', learning_rate=1.0))

        neg_emb_w_re = fluid.layers.reshape(neg_emb_w,
                                            shape=[-1, neg_num, embedding_size])

        neg_emb_b = fluid.layers.embedding(input=neg_word_reshape,
                                           is_sparse=True,
                                           size=[dict_size, 1],
                                           param_attr=fluid.ParamAttr(
                                               name='emb_b', learning_rate=1.0))

        neg_emb_b_vec = fluid.layers.reshape(neg_emb_b, shape=[-1, neg_num])

        true_logits = fluid.layers.elementwise_add(
            fluid.layers.reduce_sum(fluid.layers.elementwise_mul(
                input_emb, true_emb_w),
                                    dim=1,
                                    keep_dim=True), true_emb_b)

        input_emb_re = fluid.layers.reshape(input_emb,
                                            shape=[-1, 1, embedding_size])

        neg_matmul = fluid.layers.matmul(input_emb_re,
                                         neg_emb_w_re,
                                         transpose_y=True)
        neg_matmul_re = fluid.layers.reshape(neg_matmul, shape=[-1, neg_num])
        neg_logits = fluid.layers.elementwise_add(neg_matmul_re, neg_emb_b_vec)
        # nce loss
        label_ones = fluid.layers.fill_constant_batch_size_like(true_logits,
                                                                shape=[-1, 1],
                                                                value=1.0,
                                                                dtype='float32')
        label_zeros = fluid.layers.fill_constant_batch_size_like(
            true_logits, shape=[-1, neg_num], value=0.0, dtype='float32')

        true_xent = fluid.layers.sigmoid_cross_entropy_with_logits(
            true_logits, label_ones)
        neg_xent = fluid.layers.sigmoid_cross_entropy_with_logits(
            neg_logits, label_zeros)
        cost = fluid.layers.elementwise_add(
            fluid.layers.reduce_sum(true_xent, dim=1),
            fluid.layers.reduce_sum(neg_xent, dim=1))
        avg_cost = fluid.layers.reduce_mean(cost)

        sgd_optimizer = fluid.optimizer.SGD(
            learning_rate=fluid.layers.exponential_decay(learning_rate=1.0,
                                                         decay_steps=2100,
                                                         decay_rate=0.1,
                                                         staircase=True))
        sgd_optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        trainer, startup = self.get_trainer()

        fake_init_ops = []
        for op in startup.global_block().ops:
            if op.type == "fake_init":
                fake_init_ops.append(op)

        self.assertEqual(len(fake_init_ops), 3)


class TestDecayedAdagrad(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        opt = fluid.optimizer.DecayedAdagrad(learning_rate=0.1)
        opt.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        trainer, _ = self.get_trainer()


class TestFtrl(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        opt = fluid.optimizer.Ftrl(learning_rate=0.1)
        opt.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        trainer, _ = self.get_trainer()


class TestLRDecayConditional(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        sgd_optimizer = fluid.optimizer.SGD(
            learning_rate=fluid.layers.piecewise_decay([10000, 20000],
                                                       [1.0, 0.5, 1.0]))
        sgd_optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        trainer, _ = self.get_trainer()

        serv_op = pserver.blocks[0].ops[0]
        sub_blocks = []
        optimize_blocks = []
        for b in serv_op.all_attrs()["optimize_blocks"]:
            optimize_blocks.append(b.idx)
        for b in pserver.blocks:
            if b.idx not in optimize_blocks:
                sub_blocks.append(b.idx)

        self.assertEqual(len(pserver.blocks), 7)
        lr_decay_ops = [op.type for op in pserver.blocks[1].ops]
        self.assertEqual(lr_decay_ops, [
            "increment", "cast", "fill_constant", "fill_constant", "less_than",
            "logical_not", "conditional_block", "fill_constant",
            "fill_constant", "less_than", "logical_not", "logical_and",
            "logical_and", "conditional_block", "fill_constant",
            "conditional_block"
        ])
        # test the condition blocks
        for b in sub_blocks:
            if b == 0:
                continue
            block = pserver.blocks[b]
            self.assertEqual([op.type for op in block.ops], ["assign"])


class TestL2Decay(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(
            input=x,
            size=1000,
            act=None,
            param_attr=fluid.ParamAttr(name='fc_w',
                                       regularizer=fluid.regularizer.L2Decay()),
            bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.1)

        def filter(param):
            return param.name == "fc_w"

        clip = fluid.clip.GradientClipByValue(0.1, need_clip=filter)
        sgd_optimizer.minimize(avg_cost, grad_clip=clip)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        trainer, _ = self.get_trainer()

        self.assertEqual(len(pserver.blocks), 3)
        self.assertEqual([op.type for op in pserver.blocks[1].ops],
                         ["sum", "scale", "clip", "sgd"])
        self.assertEqual([op.type for op in pserver.blocks[2].ops],
                         ["sum", "scale", "clip", "scale", "sum", "sgd"])
        # TODO(typhoonzero): test clipping and L2Decay ops are removed from trainer


class TestL2DecayWithPiecewise(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        base_lr = 1.0
        bd = [1, 10, 20, 30]
        lr = [base_lr * (0.1**i) for i in range(len(bd) + 1)]
        sgd_optimizer = fluid.optimizer.Momentum(
            learning_rate=fluid.layers.piecewise_decay(boundaries=bd,
                                                       values=lr),
            momentum=0.9,
            regularization=fluid.regularizer.L2Decay(1e-4))
        sgd_optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        trainer, _ = self.get_trainer()

        self.assertEqual(len(pserver.blocks), 9)
        self.assertEqual([op.type for op in pserver.blocks[1].ops], [
            "increment", "cast", "fill_constant", "fill_constant", "less_than",
            "logical_not", "conditional_block", "fill_constant",
            "fill_constant", "less_than", "logical_not", "logical_and",
            "logical_and", "conditional_block", "fill_constant",
            "fill_constant", "less_than", "logical_not", "logical_and",
            "logical_and", "conditional_block", "fill_constant",
            "fill_constant", "less_than", "logical_not", "logical_and",
            "logical_and", "conditional_block", "fill_constant",
            "conditional_block"
        ])
        self.assertEqual([op.type for op in pserver.blocks[7].ops],
                         ["sum", "scale", "scale", "sum", "momentum"])
        self.assertEqual([op.type for op in pserver.blocks[8].ops],
                         ["sum", "scale", "scale", "sum", "momentum"])


class TestEmptyPserverOptimizeBlocks(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        # only one parameter
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=False)
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        sgd_optimizer = fluid.optimizer.SGD(learning_rate=1.0)
        sgd_optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        config = fluid.DistributeTranspilerConfig()
        config.slice_var_up = False

        pserver, startup = self.get_pserver(ep=self.pserver2_ep, config=config)

        self.assertEqual(len(pserver.blocks), 2)
        self.assertEqual(len(pserver.blocks[1].ops), 0)


class TestDistLookupTableBase(TranspilerTest):

    def network_with_table(self, is_sparse, is_distributed):
        self.table_size = 1000
        self.emb_size = 64
        self.lookup_table_name = 'shared_w'

        def emb_pool(ids, table_name, is_distributed):
            emb = fluid.layers.embedding(input=ids,
                                         size=[self.table_size, self.emb_size],
                                         dtype='float32',
                                         param_attr=table_name,
                                         is_sparse=is_sparse,
                                         is_distributed=is_distributed)
            pool = fluid.layers.sequence_pool(input=emb, pool_type='average')
            return pool

        title_ids = fluid.layers.data(name='title_ids',
                                      shape=[1],
                                      dtype='int64',
                                      lod_level=1)
        brand_ids = fluid.layers.data(name='brand_ids',
                                      shape=[1],
                                      dtype='int64',
                                      lod_level=1)
        profile_ids = fluid.layers.data(name='brand_ids',
                                        shape=[1],
                                        dtype='int64',
                                        lod_level=1)
        title_emb = emb_pool(title_ids, self.lookup_table_name, is_distributed)
        brand_emb = emb_pool(brand_ids, self.lookup_table_name, is_distributed)
        profile_emb = emb_pool(profile_ids, "profile_emb", False)
        fc0 = fluid.layers.concat(input=[title_emb, brand_emb, profile_emb],
                                  axis=1)
        predict = fluid.layers.fc(input=fc0,
                                  size=2,
                                  act=None,
                                  param_attr=fluid.ParamAttr(name='fc_w'),
                                  bias_attr=fluid.ParamAttr(name='fc_b'))

        label = fluid.layers.data(name='label', shape=[1], dtype='int64')
        cost = fluid.layers.cross_entropy(input=predict, label=label)
        avg_cost = fluid.layers.mean(cost)
        optimizer = fluid.optimizer.Adam(learning_rate=0.003)
        optimizer.minimize(avg_cost)


class TestLocalLookupTable(TestDistLookupTableBase):

    def net_conf(self):
        self.network_with_table(is_sparse=True, is_distributed=False)

    def transpiler_test_impl(self):
        pserver1, startup1 = self.get_pserver(self.pserver1_ep)

        self.assertEqual(len(pserver1.blocks), 4)
        # 0 listen_and_serv
        # 1 optimize for fc_w or fc_b adam
        self.assertEqual([op.type for op in pserver1.blocks[1].ops],
                         ["sum", "scale", "adam", "scale", "scale"])
        # 2 optimize for table adam
        # NOTE: if param is not selected rows, the grad will scaled to grad / trainer_num
        self.assertEqual([op.type for op in pserver1.blocks[2].ops],
                         ["sum", "scale", "adam", "scale", "scale"])

        # 3 optimize for table 2 adam
        # NOTE: if param is not selected rows, the grad will scaled to grad / trainer_num
        self.assertEqual([op.type for op in pserver1.blocks[3].ops],
                         ["sum", "scale", "adam", "scale", "scale"])

        trainer, _ = self.get_trainer()
        self.assertEqual(len(trainer.blocks), 1)
        ops = [
            'lookup_table', 'sequence_pool', 'lookup_table', 'sequence_pool',
            'lookup_table', 'sequence_pool', 'concat', 'mul', 'elementwise_add',
            'cross_entropy2', 'mean', 'fill_constant', 'mean_grad',
            'cross_entropy_grad2', 'elementwise_add_grad', 'send', 'mul_grad',
            'send', 'concat_grad', 'sequence_pool_grad', 'lookup_table_grad',
            'split_selected_rows', 'send', 'sequence_pool_grad',
            'lookup_table_grad', 'sequence_pool_grad', 'lookup_table_grad',
            'sum', 'split_selected_rows', 'send', 'send_barrier', 'recv',
            'recv', 'fetch_barrier'
        ]
        self.assertEqual([op.type for op in trainer.blocks[0].ops], ops)


class TestDistLookupTable(TestDistLookupTableBase):

    def net_conf(self):
        self.network_with_table(is_sparse=True, is_distributed=True)

    def transpiler_test_impl(self):
        pserver1, startup1 = self.get_pserver(self.pserver1_ep)

        self.assertEqual(len(pserver1.blocks), 6)
        # 0 listen_and_serv
        # 1 optimize for fc_w or fc_b adam
        self.assertEqual([op.type for op in pserver1.blocks[1].ops],
                         ["sum", "scale", "adam", "scale", "scale"])
        # 4 prefetch -> lookup_sparse_table_read for data0
        self.assertEqual([op.type for op in pserver1.blocks[2].ops],
                         ["sum", "scale", "adam", "scale", "scale"])
        # 2 optimize for table sgd
        self.assertEqual([op.type for op in pserver1.blocks[3].ops],
                         ["sum", "sgd"])
        # 3 prefetch -> lookup_sparse_table_read for data0
        self.assertEqual([op.type for op in pserver1.blocks[4].ops],
                         ["lookup_sparse_table_read"])
        # 5 save table
        self.assertEqual([op.type for op in pserver1.blocks[5].ops], ["save"])

        trainer, trainer_startup = self.get_trainer()
        self.assertEqual(len(trainer.blocks), 1)
        ops = [
            'split_ids', 'prefetch', 'merge_ids', 'sequence_pool',
            'sequence_pool', 'lookup_table', 'sequence_pool', 'concat', 'mul',
            'elementwise_add', 'cross_entropy2', 'mean', 'fill_constant',
            'mean_grad', 'cross_entropy_grad2', 'elementwise_add_grad', 'send',
            'mul_grad', 'send', 'concat_grad', 'sequence_pool_grad',
            'lookup_table_grad', 'split_selected_rows', 'send',
            'sequence_pool_grad', 'lookup_table_grad', 'sequence_pool_grad',
            'lookup_table_grad', 'sum', 'split_ids', 'send', 'send_barrier',
            'recv', 'recv', 'fetch_barrier'
        ]
        self.assertEqual([op.type for op in trainer.blocks[0].ops], ops)
        startup_ops = [
            'fill_constant', 'fill_constant', 'fill_constant', 'fill_constant',
            'fill_constant', 'fill_constant', 'fill_constant', 'fill_constant',
            'fill_constant', 'fill_constant', 'fill_constant', 'fill_constant',
            'fill_constant', 'fill_constant', 'uniform_random',
            'uniform_random', 'recv', 'recv', 'recv', 'fetch_barrier', 'concat',
            'fake_init'
        ]
        self.assertEqual([op.type for op in trainer_startup.blocks[0].ops],
                         startup_ops)


class TestAsyncLocalLookupTable(TestDistLookupTableBase):

    def net_conf(self):
        self.network_with_table(is_sparse=True, is_distributed=False)

    def transpiler_test_impl(self):
        config = fluid.DistributeTranspilerConfig()
        pserver1, startup1 = self.get_pserver(self.pserver1_ep, config, False)

        self.assertEqual(len(pserver1.blocks), 4)
        # 0 listen_and_serv
        # 1 optimize for fc_w or fc_b adam
        self.assertEqual([op.type for op in pserver1.blocks[1].ops],
                         ["adam", "scale", "scale"])
        # 2 optimize for table adam
        # NOTE: if param is not selected rows, the grad will scaled to grad / trainer_num
        self.assertEqual([op.type for op in pserver1.blocks[2].ops],
                         ["adam", "scale", "scale"])
        # 3 optimize for table adam
        # NOTE: if param is not selected rows, the grad will scaled to grad / trainer_num
        self.assertEqual([op.type for op in pserver1.blocks[3].ops],
                         ["adam", "scale", "scale"])

        trainer, _ = self.get_trainer(config)
        self.assertEqual(len(trainer.blocks), 1)
        ops = [
            'lookup_table', 'sequence_pool', 'lookup_table', 'sequence_pool',
            'lookup_table', 'sequence_pool', 'concat', 'mul', 'elementwise_add',
            'cross_entropy2', 'mean', 'fill_constant', 'mean_grad',
            'cross_entropy_grad2', 'elementwise_add_grad', 'send', 'mul_grad',
            'send', 'concat_grad', 'sequence_pool_grad', 'lookup_table_grad',
            'split_selected_rows', 'send', 'sequence_pool_grad',
            'lookup_table_grad', 'sequence_pool_grad', 'lookup_table_grad',
            'sum', 'split_selected_rows', 'send', 'recv', 'recv'
        ]
        self.assertEqual([op.type for op in trainer.blocks[0].ops], ops)


class TestAsyncDistLookupTable(TestDistLookupTableBase):

    def net_conf(self):
        self.network_with_table(is_sparse=True, is_distributed=True)

    def transpiler_test_impl(self):
        config = fluid.DistributeTranspilerConfig()

        pserver1, startup1 = self.get_pserver(self.pserver1_ep, config, False)

        self.assertEqual(len(pserver1.blocks), 6)
        # 0 listen_and_serv
        # 1 optimize for fc_w or fc_b adam
        self.assertEqual([op.type for op in pserver1.blocks[1].ops],
                         ["adam", "scale", "scale"])
        # 2 optimize for table adam
        self.assertEqual([op.type for op in pserver1.blocks[2].ops],
                         ["adam", "scale", "scale"])
        # 3 optimize for table sgd
        self.assertEqual([op.type for op in pserver1.blocks[3].ops], ["sgd"])
        # 4 prefetch -> lookup_sparse_table_read for data0
        self.assertEqual([op.type for op in pserver1.blocks[4].ops],
                         ["lookup_sparse_table_read"])
        # 5 save table
        self.assertEqual([op.type for op in pserver1.blocks[5].ops], ["save"])

        trainer, trainer_startup = self.get_trainer(config)
        self.assertEqual(len(trainer.blocks), 1)
        ops = [
            'split_ids', 'prefetch', 'merge_ids', 'sequence_pool',
            'sequence_pool', 'lookup_table', 'sequence_pool', 'concat', 'mul',
            'elementwise_add', 'cross_entropy2', 'mean', 'fill_constant',
            'mean_grad', 'cross_entropy_grad2', 'elementwise_add_grad', 'send',
            'mul_grad', 'send', 'concat_grad', 'sequence_pool_grad',
            'lookup_table_grad', 'split_selected_rows', 'send',
            'sequence_pool_grad', 'lookup_table_grad', 'sequence_pool_grad',
            'lookup_table_grad', 'sum', 'split_ids', 'send', 'recv', 'recv'
        ]
        self.assertEqual([op.type for op in trainer.blocks[0].ops], ops)
        startup_ops = [
            'fill_constant', 'fill_constant', 'fill_constant', 'fill_constant',
            'fill_constant', 'fill_constant', 'fill_constant', 'fill_constant',
            'fill_constant', 'fill_constant', 'fill_constant', 'fill_constant',
            'fill_constant', 'fill_constant', 'uniform_random',
            'uniform_random', 'recv', 'recv', 'recv', 'fetch_barrier', 'concat',
            'fake_init'
        ]
        self.assertEqual([op.type for op in trainer_startup.blocks[0].ops],
                         startup_ops)


class TestDistLookupTableSliceSize(TestDistLookupTableBase):

    def net_conf(self):
        self.network_with_table(is_sparse=True, is_distributed=True)

    def transpiler_test_impl(self):
        config = fluid.DistributeTranspilerConfig()
        pserver1, _ = self.get_pserver(self.pserver1_ep, config)

        self.assertTrue(self.transpiler.has_distributed_lookup_table)
        lookup_table_var = pserver1.global_block().vars[
            self.transpiler.table_name]
        row_size = lookup_table_var.shape[0]
        calc_row_size = int(math.ceil(self.table_size / self.pservers))
        self.assertEqual(row_size, calc_row_size)


class TestDistArgsInProgram(TestDistLookupTableBase):

    def net_conf(self):
        self.network_with_table(is_sparse=True, is_distributed=True)

    def transpiler_test_impl(self):
        trainer, _ = self.get_trainer()

        self.assertTrue(trainer._is_distributed)
        self.assertTrue(trainer._is_chief)
        self.assertEqual(trainer._distributed_lookup_table,
                         self.lookup_table_name)
        self.assertEqual(trainer._endpoints,
                         [self.pserver1_ep, self.pserver2_ep])


class TestRMSPropOptimizer(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        optimizer = fluid.optimizer.RMSProp(learning_rate=0.1)
        optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, startup = self.get_pserver(self.pserver1_ep)
        pserver2, startup2 = self.get_pserver(self.pserver2_ep)

        self.assertEqual(len(pserver.blocks), 3)
        # block1~2: optimize pass
        self.assertEqual([op.type for op in pserver.blocks[1].ops],
                         ["sum", "scale", "rmsprop"])
        # the variable #fc_w will be split into two blocks
        fc_w_var = startup.global_block().var("fc_w.block1")
        self.assertEqual(fc_w_var.shape, (500, 1000))
        moment_var = startup.global_block().var("momentum_1")
        self.assertEqual(moment_var.shape, (500, 1000))


class TestLoadSliceVar(TranspilerTest):

    def net_conf(self):
        x = fluid.layers.data(name='x', shape=[1000], dtype='float32')
        y_predict = fluid.layers.fc(input=x,
                                    size=1000,
                                    act=None,
                                    param_attr=fluid.ParamAttr(name='fc_w'),
                                    bias_attr=fluid.ParamAttr(name='fc_b'))
        y = fluid.layers.data(name='y', shape=[1], dtype='float32')
        cost = fluid.layers.square_error_cost(input=y_predict, label=y)
        avg_cost = fluid.layers.mean(cost)
        optimizer = fluid.optimizer.RMSProp(learning_rate=0.1)
        optimizer.minimize(avg_cost)

    def transpiler_test_impl(self):
        pserver, _ = self.get_pserver(self.pserver1_ep)
        pserver2, _ = self.get_pserver(self.pserver2_ep)

        vars_ps1 = pserver._parameters_on_pservers.get_distributed_vars_by_ep(
            self.pserver1_ep)
        vars_ps2 = pserver._parameters_on_pservers.get_distributed_vars_by_ep(
            self.pserver2_ep)

        self.assertTrue(vars_ps1)
        self.assertTrue(vars_ps2)

        for idx in six.moves.xrange(len(vars_ps1)):
            total_numel = 0
            ps1_numel, ps2_numel = 0, 0

            ps1_var = vars_ps1[idx]

            if not ps1_var.is_slice:
                total_numel = six.moves.reduce(lambda x, y: x * y,
                                               vars_ps1[idx].origin.shape)
                ps1_numel = six.moves.reduce(lambda x, y: x * y,
                                             vars_ps1[idx].slice.shape)
            else:
                ps2_var = None
                for var in vars_ps2:
                    if var.origin.name == ps1_var.origin.name:
                        ps2_var = var
                        break

                total_numel = six.moves.reduce(lambda x, y: x * y,
                                               ps1_var.origin.shape)
                ps1_numel = six.moves.reduce(lambda x, y: x * y,
                                             ps1_var.slice.shape)
                ps2_numel = six.moves.reduce(lambda x, y: x * y,
                                             ps2_var.slice.shape)

            self.assertEqual(total_numel, ps1_numel + ps2_numel)


class TestNCCL2Transpile(TranspilerTest):

    def test_nccl2_transpile(self):
        if fluid.core.is_compiled_with_cuda():  # test nccl2 only with cuda
            main = fluid.Program()
            startup = fluid.Program()
            with fluid.program_guard(main, startup):
                self.net_conf()

            config = fluid.DistributeTranspilerConfig()
            config.mode = "nccl2"
            config.wait_port = False
            t = fluid.DistributeTranspiler(config=config)
            t.transpile(0,
                        trainers="127.0.0.1:6174,127.0.0.1:6175",
                        current_endpoint="127.0.0.1:6174",
                        startup_program=startup)
            print([op.type for op in startup.global_block().ops])
            self.assertEqual(startup.global_block().ops[-1].type, "gen_nccl_id")
            self.assertIsNotNone(startup.global_block().vars.get("NCCLID"))
            gc.collect()
        else:
            pass


# test for remote prefetch
class TestRemoteLookupTable(TestDistLookupTableBase):

    def net_conf(self):
        import os
        os.environ['PADDLE_ENABLE_REMOTE_PREFETCH'] = "1"
        self.network_with_table(is_sparse=True, is_distributed=False)

    def transpiler_test_impl(self):
        pserver1, startup1 = self.get_pserver(self.pserver1_ep)

        self.assertEqual(len(pserver1.blocks), 4)
        # 0 listen_and_serv
        # 1 optimize for fc_w or fc_b adam
        self.assertEqual([op.type for op in pserver1.blocks[1].ops],
                         ["sum", "scale", "adam", "scale", "scale"])
        # 2 optimize for table adam
        # NOTE: if param is not selected rows, the grad will scaled to grad / trainer_num
        self.assertEqual([op.type for op in pserver1.blocks[2].ops],
                         ["sum", "scale", "adam", "scale", "scale"])

        # 3 optimize for table 2 adam
        # NOTE: if param is not selected rows, the grad will scaled to grad / trainer_num
        self.assertEqual([op.type for op in pserver1.blocks[3].ops],
                         ["sum", "scale", "adam", "scale", "scale"])

        trainer, _ = self.get_trainer()
        self.assertEqual(len(trainer.blocks), 1)
        ops = [
            'lookup_table', 'sequence_pool', 'lookup_table', 'sequence_pool',
            'lookup_table', 'sequence_pool', 'concat', 'mul', 'elementwise_add',
            'cross_entropy2', 'mean', 'fill_constant', 'mean_grad',
            'cross_entropy_grad2', 'elementwise_add_grad', 'send', 'mul_grad',
            'send', 'concat_grad', 'sequence_pool_grad', 'lookup_table_grad',
            'split_selected_rows', 'send', 'sequence_pool_grad',
            'lookup_table_grad', 'sequence_pool_grad', 'lookup_table_grad',
            'sum', 'split_selected_rows', 'send', 'send_barrier', 'recv',
            'recv', 'fetch_barrier'
        ]
        self.assertEqual([op.type for op in trainer.blocks[0].ops], ops)


# test for remote prefetch
class TestRemoteNce(TestDistLookupTableBase):

    def network_with_table(self, is_sparse, is_distributed):

        num_total_classes = 20
        sampler = "uniform"
        nid_freq_arr = np.random.dirichlet(np.ones(20) * 1000).astype('float32')

        input = fluid.layers.data(name="input", shape=[10], dtype="float32")
        label = fluid.layers.data(name="label", shape=[1], dtype="int64")

        w_param = fluid.default_main_program().global_block().create_parameter(
            shape=[num_total_classes, 10],
            dtype='float32',
            name='nce_w',
            initializer=fluid.initializer.ConstantInitializer())
        b_param = fluid.default_main_program().global_block().create_parameter(
            shape=[num_total_classes, 1],
            dtype='float32',
            name='nce_b',
            initializer=fluid.initializer.ConstantInitializer())

        cost = fluid.layers.nce(input=input,
                                label=label,
                                num_total_classes=num_total_classes,
                                sampler=sampler,
                                custom_dist=nid_freq_arr.tolist(),
                                sample_weight=None,
                                param_attr='nce_w',
                                bias_attr='nce_b',
                                seed=1,
                                num_neg_samples=5,
                                is_sparse=is_sparse)
        avg_cost = fluid.layers.mean(cost)
        # optimizer
        optimizer = fluid.optimizer.Adam(learning_rate=0.003)
        optimizer.minimize(avg_cost)

    def net_conf(self):
        import os
        os.environ['PADDLE_ENABLE_REMOTE_PREFETCH'] = "1"
        self.network_with_table(is_sparse=True, is_distributed=False)

    def transpiler_test_impl(self):
        trainer, _ = self.get_trainer()

        out_vars = ["nce_w"]
        in_vars = ["nce_b"]

        recv_var_names = []

        for op in trainer.blocks[0].ops:
            if op.type == "recv":
                for var in op.output("Out"):
                    recv_var_names.append(var)

        for out_var in out_vars:
            self.assertFalse(out_var in recv_var_names)
        for in_var in in_vars:
            self.assertTrue(in_var in recv_var_names)


# test for remote prefetch
class TestRemoteHsigmoid(TestDistLookupTableBase):

    def network_with_table(self, is_sparse, is_distributed):

        num_total_classes = 3

        input = fluid.layers.data(name="input", shape=[1], dtype="float32")
        label = fluid.layers.data(name="label", shape=[1], dtype="int64")
        path_table = fluid.layers.data(name='path_table',
                                       shape=[3],
                                       dtype='int64')
        path_code = fluid.layers.data(name='path_code',
                                      shape=[3],
                                      dtype='int64')
        w_param = fluid.default_main_program().global_block().create_parameter(
            shape=[num_total_classes, 10],
            dtype='float32',
            name='hs_w',
            initializer=fluid.initializer.ConstantInitializer())
        b_param = fluid.default_main_program().global_block().create_parameter(
            shape=[3, 1],
            dtype='float32',
            name='hs_b',
            initializer=fluid.initializer.ConstantInitializer())

        emb = fluid.layers.embedding(
            input=input,
            is_sparse=is_sparse,
            size=[3, 3],
            param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal(
                scale=1 / math.sqrt(num_total_classes))))

        cost = fluid.layers.hsigmoid(input=emb,
                                     label=label,
                                     num_classes=num_total_classes,
                                     path_table=path_table,
                                     path_code=path_code,
                                     is_custom=True,
                                     is_sparse=is_sparse)
        avg_cost = fluid.layers.mean(cost)
        # optimizer
        optimizer = fluid.optimizer.SGD(learning_rate=0.003)
        optimizer.minimize(avg_cost)

    def net_conf(self):
        import os
        os.environ['PADDLE_ENABLE_REMOTE_PREFETCH'] = "1"
        self.network_with_table(is_sparse=True, is_distributed=False)

    def transpiler_test_impl(self):
        trainer, _ = self.get_trainer()
        params_to_check = list()
        for op in trainer.blocks[0].ops:
            if op.type == "hierarchical_sigmoid":
                params_to_check = [op.input("W")[0], op.input("Bias")[0]]
                for name in ["epmap", "table_names", "epmap"]:
                    assert op.has_attr(name)
                    if name == "epmap":
                        assert op.attr(name)[0] == u'127.0.0.1:6174'
                    elif name == "table_names":
                        assert op.attr(name)[0] == u'hierarchical_sigmoid_0.w_0'
                    else:
                        assert op.attr(name) == 3
            elif op.type == "lookup_table":
                params_to_check.append(op.input("W")[0])
            else:
                pass
        op_count = 0
        for op in trainer.blocks[0].ops:
            if op.type == "recv":
                assert len(op.output("Out")) == 1
                assert op.output("Out")[0] == u'hierarchical_sigmoid_0.b_0'
                op_count += 1
        assert op_count == 1


if __name__ == "__main__":
    unittest.main()
