#!/usr/bin/bash

if [ -n "$1" ]; then
    if [ "$1" == "--no-cache" ]; then
        FORCE_NO_CACHE="--no-cache"
        COMMIT=$(git rev-parse --short HEAD)
    else
        COMMIT=$1
        if ! git cat-file -e $COMMIT^{commit} 2>/dev/null; then
            echo "ERROR: Commit $COMMIT not found in local repository."
            exit 1
        fi
    fi
else
    COMMIT=$(git rev-parse --short HEAD)
fi

if [ "$COMMIT" == "$(git rev-parse --short HEAD)" ]; then
    if [ -n "$(git status --porcelain)" ]; then
        echo "WARNING: You are building the latest commit ${COMMIT}, but you have uncommitted changes."
        echo "         This means that the image will not be reproducible."
        echo "         If you want to build the latest commit, please commit your changes first."
        read -p "Do you want to continue anyway? [y/N] " -n 1 -r
        echo
        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
            exit 1
        fi
    fi
fi

check_remote_commit_exists() {
    local url="$1"
    local commit="$2"
    local tmpdir
    tmpdir="$(mktemp -d)"
    trap 'rm -rf "$tmpdir"' RETURN
    git -C "$tmpdir" init -q
    git -C "$tmpdir" remote add origin "$url"
    if git -C "$tmpdir" fetch --quiet --depth=1 origin "$commit" 2>/dev/null; then
        echo "✅ Commit $commit exists on remote."
        return 0
    else
        echo "❌ ERROR: Commit $commit not found on remote."
        echo "Refs currently visible on remote:"
        git ls-remote --heads --tags "$url"
        return 1
    fi
}

if ! check_remote_commit_exists https://github.com/jkiesele/minicalosim $COMMIT; then
    echo "WARNING: Commit $COMMIT not found in remote repository."
fi

if [ "$2" == "--no-cache" ]; then
    FORCE_NO_CACHE="--no-cache"
fi

cd "$(dirname "$0")"
cd ../../
echo "Building minicalosim-mini:$COMMIT"
echo "Current working directory: $(pwd)"

docker build $FORCE_NO_CACHE \
    -t jkiesele/minicalosim-mini:$COMMIT \
    --build-arg USER=$USER \
    --build-arg BUILD_DATE="$(date)" \
    --build-arg COMMIT=$COMMIT \
    -f minicalosim/docker/Dockerfile-mini .

echo "successfully built container jkiesele/minicalosim-mini:${COMMIT}"

docker tag jkiesele/minicalosim-mini:$COMMIT jkiesele/minicalosim-mini:latest

echo "also tagged as jkiesele/minicalosim-mini:latest"