#!/usr/bin/env bash

# this program generates py-interface/amdsmi_wrapper.py

set -eu

# get current dir
DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )

# override by calling this script with:
# DOCKER_NAME=yourdockername ./update_wrapper.sh
DOCKER_NAME="${DOCKER_NAME:-dmitriigalantsev/amdsmi_wrapper_updater}"

command -v docker &>/dev/null || {
    echo "Please install docker!" >&2
    exit 1
}

DOCKER_BUILDKIT=$(docker buildx version >/dev/null 2>&1 && echo 1 || echo 0)
export DOCKER_BUILDKIT

build_docker_image () {
    DOCKER_DIR="$DIR/py-interface"
    DOCKERFILE="$DOCKER_DIR/Dockerfile"

    DOCKERFILE_TIME=$(git log -1 --format=%at -- "$DOCKERFILE")
    IMAGE_TIME=$(docker inspect "$DOCKER_NAME" --format '{{.Created}}' 2>/dev/null | date +%s -d- || echo 0)

    # Build if Dockerfile is newer than image
    if [ "$DOCKERFILE_TIME" -gt "$IMAGE_TIME" ]; then
        docker build "$DOCKER_DIR" -f "$DOCKERFILE" -t "$DOCKER_NAME":latest
    fi
}

build_docker_image

ENABLE_ESMI_LIB=""
# source ENABLE_ESMI_LIB variable from the previous build if it exists
if [ -e 'build/CMakeCache.txt' ]; then
    GREP_RESULT=$(grep "ENABLE_ESMI_LIB.*=" "${DIR}/build/CMakeCache.txt" | tail -n 1 | cut -d = -f 2)
    ENABLE_ESMI_LIB="-DENABLE_ESMI_LIB=$GREP_RESULT"
    echo "ENABLE_ESMI_LIB: [$ENABLE_ESMI_LIB]"
fi

docker run --rm -ti --volume "$DIR":/src:rw "$DOCKER_NAME":latest bash -c "
cp -r /src /tmp/src \
    && cd /tmp/src \
    && rm -rf build .cache \
    && cmake -B build -DBUILD_WRAPPER=ON $ENABLE_ESMI_LIB \
    && make -C build -j $(nproc) \
    && cp /tmp/src/py-interface/amdsmi_wrapper.py /src/py-interface/amdsmi_wrapper.py \
    && chown --reference /src/py-interface/CMakeLists.txt /src/py-interface/amdsmi_wrapper.py"

echo -e "Generated new wrapper!
[$DIR/py-interface/amdsmi_wrapper.py]"