#!/usr/bin/env bash
#
# Integration Infiniband test using villas node.
#
# Author: Dennis Potter <dennis@dennispotter.eu>
# SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
# SPDX-License-Identifier: Apache-2.0

set -e

# Check if tools are present
if ! command -v lspci > /dev/null; then
    echo "lspci tool is missing"
    exit 99
fi

# Check if user is superuser. SU is used for namespace
if [[ "${EUID}" -ne 0 ]]; then
    echo "Please run as root"
    exit 99
fi

# Check if Infiniband card is present
if [[ ! $(lspci | grep Infiniband) ]]; then
    echo "Did not find any Infiniband cards in system"
    exit 99
fi

DIR=$(mktemp -d)
pushd ${DIR}

function finish {
    popd
    rm -rf ${DIR}
}
trap finish EXIT

NUM_SAMPLES=${NUM_SAMPLES:-10}

# Set config file with a MODE flag
cat > config.json <<EOF
{
    "logging": {
        "level": 0,
        "facilities": "ib"
    },
    "http": {
        "enabled": false
    },
    "nodes": {
        "results": {
             "type": "file",
             "uri": "output.dat"
        },
        "ib_node_source": {
             "type": "infiniband",
             "rdma_port_space": "MODE",
             "in": {
             	"address": "10.0.0.2:1337",
             	"max_wrs": 8192,
             	"cq_size": 8192,
             	"poll_mode": "BUSY",
             	"buffer_subtraction": 128
             },
             "out": {
             	"address": "10.0.0.1:1337",
             	"resolution_timeout": 1000,
             	"max_wrs": 8192,
             	"cq_size": 256,
             	"send_inline": true,
             	"max_inline_data": 60,
             	"use_fallback": true
             }
        },
        "ib_node_target": {
             "type": "infiniband",
             "rdma_port_space": "MODE",
             "in": {
             	"address": "10.0.0.1:1337",
             	"max_wrs": 8192,
             	"cq_size": 8192,
             	"poll_mode": "BUSY",
             	"buffer_subtraction": 128
             }
        }
    }
}
EOF

# Set target config file, which is the same for both runs
cat > target.json <<EOF
{
    "@include": "config.json",

    "paths": [
        {
             "in": "ib_node_target",
             "out": "results"
        }
    ]
}
EOF

villas signal -l ${NUM_SAMPLES} -n random > input.dat

# Declare modes
MODES=("RC" "UC" "UD")

# Run through modes
for MODE in "${MODES[@]}"; do

    echo "## Start ${MODE}"

    sed -i -e 's/MODE/'${MODE}'/g' config.json

    # Start receiving node
    villas node target.json &
    PID_PROC=$!

    # Wait for node to complete init
    sleep 1

    # Preprare fifo
    FIFO=$(mktemp -p ${DIR} -t)
    if [[ ! -p ${FIFO} ]]; then
        mkfifo ${FIFO}
    fi

    # Start sending pipe
    ip netns exec namespace0 \
    villas pipe -l ${NUM_SAMPLES} config.json ib_node_source >output.dat <${FIFO} &
    PID_PIPE=$!

    # Keep pipe alive
    sleep 5 >${FIFO} &

    # Wait for pipe to connect to node
    sleep 3

    # Write data to pipe
    cat input.dat >${FIFO} &

    # Wait for node to handle samples
    sleep 2

    # Stop node
    kill ${PID_PIPE}
    kill ${PID_PROC}

    villas compare input.dat output.dat

    sed -i -e 's/'${MODE}'/MODE/g' config.json
done