import tensorflow as tf
import pymysql
from pyspark.conf import SparkConf
import pytispark.pytispark as pti
from pyspark.sql import SparkSession
import datetime
import pandas as pd
import time
from pyspark import StorageLevel
import os

def model_fn(features, labels, mode, params):
    """Bulid Model function f(x) for Estimator."""
    #------hyperparameters----
    field_size = params["field_size"]
    feature_size = params["feature_size"]
    embedding_size = params["embedding_size"]
    l2_reg = params["l2_reg"]
    learning_rate = params["learning_rate"]
    #optimizer = params["optimizer"]
    layers = list(map(int, params["deep_layers"].split(',')))
    dropout = list(map(float, params["dropout"].split(',')))
    ctr_task_wgt = params["ctr_task_wgt"]
    common_dims = field_size*embedding_size

    #------bulid weights------
    Feat_Emb = tf.get_variable(name='embeddings', shape=[feature_size, embedding_size], initializer=tf.glorot_normal_initializer())

    feat_ids = features['ids']
    app_list = features['app_list']
    level2_list = features['level2_list']
    level3_list = features['level3_list']
    tag1_list = features['tag1_list']
    tag2_list = features['tag2_list']
    tag3_list = features['tag3_list']
    tag4_list = features['tag4_list']
    tag5_list = features['tag5_list']
    tag6_list = features['tag6_list']
    tag7_list = features['tag7_list']


    #------build f(x)------
    with tf.variable_scope("Shared-Embedding-layer"):
        embedding_id = tf.nn.embedding_lookup(Feat_Emb,feat_ids)
        app_id = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=app_list, sp_weights=None, combiner="sum")
        level2 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=level2_list, sp_weights=None, combiner="sum")
        level3 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=level3_list, sp_weights=None, combiner="sum")
        tag1 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag1_list, sp_weights=None, combiner="sum")
        tag2 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag2_list, sp_weights=None, combiner="sum")
        tag3 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag3_list, sp_weights=None, combiner="sum")
        tag4 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag4_list, sp_weights=None, combiner="sum")
        tag5 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag5_list, sp_weights=None, combiner="sum")
        tag6 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag6_list, sp_weights=None, combiner="sum")
        tag7 = tf.nn.embedding_lookup_sparse(Feat_Emb, sp_ids=tag7_list, sp_weights=None, combiner="sum")

        # x_concat = tf.reshape(embedding_id,shape=[-1, common_dims])  # None * (F * K)
        x_concat = tf.concat([tf.reshape(embedding_id, shape=[-1, common_dims]), app_id, level2, level3, tag1,
                              tag2, tag3, tag4, tag5, tag6, tag7], axis=1)

    with tf.name_scope("CVR_Task"):
        if mode == tf.estimator.ModeKeys.TRAIN:
            train_phase = True
        else:
            train_phase = False
        x_cvr = x_concat
        for i in range(len(layers)):
            x_cvr = tf.contrib.layers.fully_connected(inputs=x_cvr, num_outputs=layers[i], \
                weights_regularizer=tf.contrib.layers.l2_regularizer(l2_reg), scope='cvr_mlp%d' % i)
        y_cvr = tf.contrib.layers.fully_connected(inputs=x_cvr, num_outputs=1, activation_fn=tf.identity, \
            weights_regularizer=tf.contrib.layers.l2_regularizer(l2_reg), scope='cvr_out')
        y_cvr = tf.reshape(y_cvr,shape=[-1])

    with tf.name_scope("CTR_Task"):
        if mode == tf.estimator.ModeKeys.TRAIN:
            train_phase = True
        else:
            train_phase = False

        x_ctr = x_concat
        for i in range(len(layers)):
            x_ctr = tf.contrib.layers.fully_connected(inputs=x_ctr, num_outputs=layers[i], \
                weights_regularizer=tf.contrib.layers.l2_regularizer(l2_reg), scope='ctr_mlp%d' % i)
        y_ctr = tf.contrib.layers.fully_connected(inputs=x_ctr, num_outputs=1, activation_fn=tf.identity, \
            weights_regularizer=tf.contrib.layers.l2_regularizer(l2_reg), scope='ctr_out')
        y_ctr = tf.reshape(y_ctr,shape=[-1])

    with tf.variable_scope("MTL-Layer"):
        pctr = tf.sigmoid(y_ctr)
        pcvr = tf.sigmoid(y_cvr)
        pctcvr = pctr*pcvr

    predictions={"pcvr": pcvr, "pctr": pctr, "pctcvr": pctcvr}
    export_outputs = {tf.saved_model.signature_constants.DEFAULT_SERVING_SIGNATURE_DEF_KEY: tf.estimator.export.PredictOutput(predictions)}
    # Provide an estimator spec for `ModeKeys.PREDICT`
    if mode == tf.estimator.ModeKeys.PREDICT:
        return tf.estimator.EstimatorSpec(
                mode=mode,
                predictions=predictions,
                export_outputs=export_outputs)

def input_fn(filenames, batch_size=32, num_epochs=1, perform_shuffle=False):
    print('Parsing', filenames)
    def _parse_fn(record):
        features = {
            "y": tf.FixedLenFeature([], tf.float32),
            "z": tf.FixedLenFeature([], tf.float32),
            "ids": tf.FixedLenFeature([15], tf.int64),
            "app_list": tf.VarLenFeature(tf.int64),
            "level2_list": tf.VarLenFeature(tf.int64),
            "level3_list": tf.VarLenFeature(tf.int64),
            "tag1_list": tf.VarLenFeature(tf.int64),
            "tag2_list": tf.VarLenFeature(tf.int64),
            "tag3_list": tf.VarLenFeature(tf.int64),
            "tag4_list": tf.VarLenFeature(tf.int64),
            "tag5_list": tf.VarLenFeature(tf.int64),
            "tag6_list": tf.VarLenFeature(tf.int64),
            "tag7_list": tf.VarLenFeature(tf.int64)
        }
        parsed = tf.parse_single_example(record, features)
        y = parsed.pop('y')
        z = parsed.pop('z')
        return parsed, {"y": y, "z": z}

    # Extract lines from input files using the Dataset API, can pass one filename or filename list
    dataset = tf.data.TFRecordDataset(filenames).map(_parse_fn, num_parallel_calls=10).prefetch(500000)    # multi-thread pre-process then prefetch

    # Randomizes input using a window of 256 elements (read into memory)
    if perform_shuffle:
        dataset = dataset.shuffle(buffer_size=256)

    # epochs from blending together.
    dataset = dataset.repeat(num_epochs)
    dataset = dataset.batch(batch_size) # Batch size to use
    # dataset = dataset.padded_batch(batch_size, padded_shapes=({"feeds_ids": [None], "feeds_vals": [None], "title_ids": [None]}, [None]))   #不定长补齐

    #return dataset.make_one_shot_iterator()
    iterator = dataset.make_one_shot_iterator()
    batch_features, batch_labels = iterator.get_next()
    #return tf.reshape(batch_ids,shape=[-1,field_size]), tf.reshape(batch_vals,shape=[-1,field_size]), batch_labels
    #print("-"*100)
    #print(batch_features,batch_labels)
    return batch_features, batch_labels

def main():
    # dt_dir = (date.today() + timedelta(-1)).strftime('%Y%m%d')
    model_dir = "hdfs://172.16.32.4:8020/strategy/esmm/model_ckpt/DeepCvrMTL/"
    te_files = ["hdfs://172.16.32.4:8020/strategy/esmm/nearby/part-r-00000"]
    model_params = {
        "field_size": 15,
        "feature_size": 600000,
        "embedding_size": 32,
        "learning_rate": 0.0001,
        "l2_reg": 0.005,
        "deep_layers": '512,256,128,64,32',
        "dropout": '0.3,0.3,0.3,0.3,0.3',
        "ctr_task_wgt":0.5
    }
    config = tf.estimator.RunConfig().replace(session_config = tf.ConfigProto(device_count={'GPU':0, 'CPU':36}),
            log_step_count_steps=100, save_summary_steps=100)
    Estimator = tf.estimator.Estimator(model_fn=model_fn, model_dir=model_dir, params=model_params, config=config)

    preds = Estimator.predict(input_fn=lambda: input_fn(te_files, num_epochs=1, batch_size=10000), predict_keys=["pctcvr","pctr","pcvr"])

    # with open("/home/gmuser/esmm/nearby/pred.txt", "w") as fo:
    #     for prob in preds:
    #         fo.write("%f\t%f\t%f\n" % (prob['pctr'], prob['pcvr'], prob['pctcvr']))

    indices = []
    for prob in preds:
        indices.append([prob['pctr'], prob['pcvr'], prob['pctcvr']])
    return indices

def test_map(x):
    return x * x


if __name__ == "__main__":
    sparkConf = SparkConf().set("spark.hive.mapred.supports.subdirectories", "true") \
        .set("spark.hadoop.mapreduce.input.fileinputformat.input.dir.recursive", "true") \
        .set("spark.tispark.plan.allow_index_double_read", "false") \
        .set("spark.tispark.plan.allow_index_read", "true") \
        .set("spark.sql.extensions", "org.apache.spark.sql.TiExtensions") \
        .set("spark.tispark.pd.addresses", "172.16.40.158:2379").set("spark.io.compression.codec", "lzf")\
        .set("spark.driver.maxResultSize", "8g").set("spark.sql.avro.compression.codec","snappy")
    spark = SparkSession.builder.config(conf=sparkConf).enableHiveSupport().getOrCreate()
    spark.sparkContext.setLogLevel("WARN")

    path = "hdfs://172.16.32.4:8020/strategy/esmm/"
    # df = spark.read.format("tfrecords").load(path+"nearby/part-r-00000")
    # df.show()

    # name = spark.sparkContext.parallelize([1,2,3,4,5])
    #
    # test = name.repartition(5).map(lambda x: test_map(x))
    # print(test)
    # print(test.collect())

    tf.logging.set_verbosity(tf.logging.INFO)
    # te_files = [[path+"nearby/part-r-00000"],[path+"native/part-r-00000"]]
    te_files = [path + "nearby/part-r-00000"]
    # rdd_te_files = spark.sparkContext.parallelize(te_files)
    # indices = rdd_te_files.repartition(2).map(lambda x: main(x))
    # print(indices.collect())

    main()

    b = time.time()
    print("耗时(分钟)：")
    print((time.time()-b)/60)
