#!/usr/bin/env bash
# Copyright 2020 Huawei Technologies Co., Ltd
#
# 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.
# ============================================================================

run_gpu()
{
    if [ $# -gt 5 ] || [ $# -lt 4 ]
    then
        echo "Usage:\n \
              GPU: sh run_train.sh GPU [DEVICE_NUM] [VISIABLE_DEVICES(0,1,2,3,4,5,6,7)] [DATASET_PATH]\n \
              CPU: sh run_train.sh CPU [DATASET_PATH]\n \
             "
    exit 1
    fi
    if [ $2 -lt 1 ] && [ $2 -gt 8 ]
    then
        echo "error: DEVICE_NUM=$2 is not in (1-8)"
    exit 1
    fi

    if [ ! -d $4 ]
    then
        echo "error: DATASET_PATH=$4 is not a directory"
    exit 1
    fi

    BASEPATH=$(cd "`dirname $0`" || exit; pwd)
    export PYTHONPATH=${BASEPATH}:$PYTHONPATH
    if [ -d "../train" ];
    then
        rm -rf ../train
    fi
    mkdir ../train
    cd ../train || exit

    export CUDA_VISIBLE_DEVICES="$3"
    mpirun -n $2 --allow-run-as-root --output-filename log_output --merge-stderr-to-stdout \
    python ${BASEPATH}/../train.py \
        --dataset_path=$4 \
        --device_target=$1 \
        &> ../train.log &  # dataset train folder
}

run_cpu()
{
    if [ $# -gt 3 ] || [ $# -lt 2 ]
    then
        echo "Usage:\n \
              GPU: sh run_train.sh GPU [DEVICE_NUM] [VISIABLE_DEVICES(0,1,2,3,4,5,6,7)] [DATASET_PATH]\n \
              CPU: sh run_train.sh CPU [DATASET_PATH]\n \
             "
    exit 1
    fi

    if [ ! -d $2 ]
    then
        echo "error: DATASET_PATH=$2 is not a directory"
    exit 1
    fi

    BASEPATH=$(cd "`dirname $0`" || exit; pwd)
    export PYTHONPATH=${BASEPATH}:$PYTHONPATH
    if [ -d "../train" ];
    then
        rm -rf ../train
    fi
    mkdir ../train
    cd ../train || exit

    python ${BASEPATH}/../train.py \
        --dataset_path=$2 \
        --device_target=$1 \
        &> ../train.log &  # dataset train folder
}

if [ $1 = "GPU" ] ; then
    run_gpu "$@"
elif [ $1 = "CPU" ] ; then
    run_cpu "$@"
else
    echo "Unsupported device_target"
fi;