#!/usr/bin/env python
# Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#  * Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#  * Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#  * Neither the name of NVIDIA CORPORATION nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import argparse
import sys

import numpy as np
import tritonclient.grpc as grpcclient

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "-v",
        "--verbose",
        action="store_true",
        required=False,
        default=False,
        help="Enable verbose output",
    )
    parser.add_argument(
        "-u",
        "--url",
        type=str,
        required=False,
        default="localhost:8001",
        help="Inference server URL. Default is localhost:8001.",
    )
    # GRPC KeepAlive: https://github.com/grpc/grpc/blob/master/doc/keepalive.md
    parser.add_argument(
        "--grpc-keepalive-time",
        type=int,
        required=False,
        default=2**31 - 1,
        help="The period (in milliseconds) after which a keepalive ping is sent on "
        "the transport. Default is 2**31-1 (INT_MAX: disabled).",
    )
    parser.add_argument(
        "--grpc-keepalive-timeout",
        type=int,
        required=False,
        default=20000,
        help="The period (in milliseconds) the sender of the keepalive ping waits "
        "for an acknowledgement. If it does not receive an acknowledgment "
        "within this time, it will close the connection. "
        "Default is 20000 (20 seconds).",
    )
    parser.add_argument(
        "--grpc-keepalive-permit-without-calls",
        action="store_true",
        required=False,
        default=False,
        help="Allows keepalive pings to be sent even if there are no calls in "
        "flight. Default is False.",
    )
    parser.add_argument(
        "--grpc-http2-max-pings-without-data",
        type=int,
        required=False,
        default=2,
        help="The maximum number of pings that can be sent when there is no "
        "data/header frame to be sent. gRPC Core will not continue sending "
        "pings if we run over the limit. Setting it to 0 allows sending pings "
        "without such a restriction. Default is 2.",
    )

    FLAGS = parser.parse_args()
    try:
        keepalive_options = grpcclient.KeepAliveOptions(
            keepalive_time_ms=FLAGS.grpc_keepalive_time,
            keepalive_timeout_ms=FLAGS.grpc_keepalive_timeout,
            keepalive_permit_without_calls=FLAGS.grpc_keepalive_permit_without_calls,
            http2_max_pings_without_data=FLAGS.grpc_http2_max_pings_without_data,
        )
        triton_client = grpcclient.InferenceServerClient(
            url=FLAGS.url, verbose=FLAGS.verbose, keepalive_options=keepalive_options
        )
    except Exception as e:
        print("channel creation failed: " + str(e))
        sys.exit()

    model_name = "simple"

    # Infer
    inputs = []
    outputs = []
    inputs.append(grpcclient.InferInput("INPUT0", [1, 16], "INT32"))
    inputs.append(grpcclient.InferInput("INPUT1", [1, 16], "INT32"))

    # Create the data for the two input tensors. Initialize the first
    # to unique integers and the second to all ones.
    input0_data = np.arange(start=0, stop=16, dtype=np.int32)
    input0_data = np.expand_dims(input0_data, axis=0)
    input1_data = np.ones(shape=(1, 16), dtype=np.int32)

    # Initialize the data
    inputs[0].set_data_from_numpy(input0_data)
    inputs[1].set_data_from_numpy(input1_data)

    outputs.append(grpcclient.InferRequestedOutput("OUTPUT0"))
    outputs.append(grpcclient.InferRequestedOutput("OUTPUT1"))

    # Test with outputs
    results = triton_client.infer(
        model_name=model_name, inputs=inputs, outputs=outputs, headers={"test": "1"}
    )

    # Get the output arrays from the results
    output0_data = results.as_numpy("OUTPUT0")
    output1_data = results.as_numpy("OUTPUT1")

    for i in range(16):
        print(
            str(input0_data[0][i])
            + " + "
            + str(input1_data[0][i])
            + " = "
            + str(output0_data[0][i])
        )
        print(
            str(input0_data[0][i])
            + " - "
            + str(input1_data[0][i])
            + " = "
            + str(output1_data[0][i])
        )
        if (input0_data[0][i] + input1_data[0][i]) != output0_data[0][i]:
            print("sync infer error: incorrect sum")
            sys.exit(1)
        if (input0_data[0][i] - input1_data[0][i]) != output1_data[0][i]:
            print("sync infer error: incorrect difference")
            sys.exit(1)

    print("PASS: KeepAlive")