#!/bin/bash

# ================== CONFIG ==================
SCRIPT_NAME=$(basename "$0")
ENV_FILE=".env"
WORKDIR="/__w/IfcOpenShell/IfcOpenShell"
NAMEPREFIX=ifcopenshell

function set_env() {
    # Load .env file if it exists
    if [[ -f "$ENV_FILE" ]]; then
        set -a
        source "$ENV_FILE"
        set +a
        echo "✅ Loaded environment variables from $ENV_FILE"
    else
        echo "⚠️  No $ENV_FILE found, proceeding without it."
    fi
}

set_env

# ================ FUNCTIONS =================

function create() {
    echo "⭐ Creating image: ifcopenshell-build-env"
    docker build -f Dockerfile \
        --build-arg USER_UID="$(id -u)" --build-arg USER_GID="$(id -g)" \
        -t ifcopenshell-build-env:updated .
}

function update() {
    # The Dockerfile always builds FROM a clean rockylinux:9 and does
    # `dnf update -y` as its first step, so re-running create() is enough
    # to get fresh packages.
    echo "⚡ Updating image: ifcopenshell-build-env"
    create
}

function up() {
    # Creates the container if it doesn't exist yet (and starts it either
    # way) - this is the one that needs ready_repo, since a freshly created
    # container has no submodules/dependency cache in place yet.
    echo "🚀 Creating/starting stack: ifcopenshell-${UNIQUE_ID}"
    unique          # Update UNIQUE_ID first
    docker compose up -d "$@"   # Container must exist before ready_repo can exec into it.
    ready_repo      # Ensure repo is recursive, and the build repo is in place.
}

function down() {
    # Removes the container (and its network) entirely. Named volumes
    # (ccache) and the bind-mounted repo/build/ survive; up() will recreate
    # the container from scratch next time.
    echo "🔥 Removing stack: ifcopenshell-${UNIQUE_ID}"
    docker compose down "$@"
}

function stop() {
    # Stops the existing container without removing it - the container,
    # its filesystem layer, and its exec history all remain intact.
    echo "🛑 Stopping stack: ifcopenshell-${UNIQUE_ID}"
    docker compose stop "$@"
}

function start() {
    # Starts a previously-stopped container back up. Does nothing (and
    # won't create anything) if the container doesn't exist - use up() for
    # that.
    echo "▶️  Starting stack: ifcopenshell-${UNIQUE_ID}"
    docker compose start "$@"
}

function restart() {
    echo "🔄 Restarting stack (stop, then start)..."
    stop
    start
}

function recreate() {
    echo "♻️  Recreating stack (down, then up)..."
    down
    up
}

function logs() {
    echo "📜 Showing logs..."
    docker compose logs -f "$@"
}

function ps() {
    docker compose ps
}

function config() {
    echo "🔍 Validated compose configuration:"
    docker compose config
}

function remove() {
    # Lower-level than down(): removes already-stopped containers without
    # touching the compose network. Mostly useful after a plain stop().
    echo "🗑️  Removing stopped containers: ifcopenshell-${UNIQUE_ID}"
    docker compose rm "$@"
}

function unique() {
    echo "🔧 Making stack name folder specific..."

    REGEX="^UNIQUE_ID="

    if [[ ! -f "$ENV_FILE" ]] || ! grep -qE "$REGEX" "$ENV_FILE"; then
        echo -e "\nUNIQUE_ID=dummy\n" >> "$ENV_FILE"
    fi

    export UNIQUE_ID="$(pwd | sha256sum | cut -c -8)"

    # `sed -i` takes incompatible syntax between GNU sed (Linux) and BSD sed
    # (macOS) - `-si` is GNU-only and errors as "illegal option -- s" under
    # BSD/macOS sed. Avoid -i altogether and do the in-place edit via a temp
    # file + mv instead, which behaves identically with either sed.
    local tmp_file
    tmp_file="$(mktemp "${ENV_FILE}.XXXXXX")"
    sed "s/^UNIQUE_ID=.*$/UNIQUE_ID=${UNIQUE_ID}/" "$ENV_FILE" > "$tmp_file"
    mv "$tmp_file" "$ENV_FILE"

    set_env
}

function ready_repo() {
    echo "👍 Getting the repo ready to build..."
    docker exec -i -w "${WORKDIR}" "${NAMEPREFIX}-${UNIQUE_ID}" bash -c '
        set -euo pipefail   # Recommended for robustness

        git submodule update --init --recursive

        if [[ ! -d "build" ]]; then
            git clone -b rockylinux9-x64 https://github.com/IfcOpenShell/build-outputs.git build
        else
            cd build
            git pull
            cd ..
        fi

        if [[ ! -d "build/Linux/x86_64/install/boost-1.86.0/" ]]; then
            cd build
            uv run ../nix/cache_dependencies.py unpack
            cd ..
        fi
    '
}

function build() {
    echo "☕ Execute the build, go make yourself a cuppa... I'll be a while"
    local BUILD_TARGET="$1"
    
    docker exec -i -w "${WORKDIR}" -e PY_TGT="${PY_TGT}" -e BUILD_TARGET="${BUILD_TARGET}" "${NAMEPREFIX}-${UNIQUE_ID}" bash -c '
        set -o pipefail
        CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release uv run ./nix/build-all.py -v ${PY_TGT:+-$PY_TGT} --diskcleanup ${BUILD_TARGET} 2>&1 | tee build.log
    '
    echo "🎒 Pack Dependencies"
    docker exec -i -w "${WORKDIR}" "${NAMEPREFIX}-${UNIQUE_ID}" bash -c '
        cd build
        uv run ../nix/cache_dependencies.py pack
    '

    echo "🎁 Package .zip archives"
    docker exec -i -w "${WORKDIR}" -e GITHUB_SHA="$(git rev-parse HEAD)" "${NAMEPREFIX}-${UNIQUE_ID}" bash -c '
        OUTPUT_DIR=${PWD}/output
        VERSION=v`cat VERSION`
        mkdir -p ${OUTPUT_DIR}
        cd ./build/`uname`/*/install/ifcopenshell

        ls -d python-* | while read py_version; do
            postfix=`echo ${py_version: -1} | sed s/[0-9]//`
            numbers=`echo $py_version | grep -oE "[0-9]+\.[0-9]+" | tr -d "."`
            py_version_major=python-${numbers}$postfix
            pushd . > /dev/null
            cd $py_version
            if [ ! -d ifcopenshell ]; then
                mkdir ../ifcopenshell_
                mv * ../ifcopenshell_
                mv ../ifcopenshell_ ifcopenshell
            fi
            [ -d ifcopenshell/__pycache__ ] && rm -rf ifcopenshell/__pycache__
            find ifcopenshell -name "*.pyc" -delete
            zip -r -qq ifcopenshell-${py_version_major}-${VERSION}-${GITHUB_SHA:0:7}-linux64.zip ifcopenshell/*
            mv *.zip ${OUTPUT_DIR}/
            popd > /dev/null
        done

        cd bin
        if compgen -G "./*.zip" > /dev/null; then
            rm *.zip 2>&1 >/dev/null || true
        ls | while read exe; do
            zip -qq -r ${exe}-${VERSION}-${GITHUB_SHA:0:7}-linux64.zip $exe
        done
        mv *.zip ${OUTPUT_DIR}/
        cd ..
      '
}

function attach() {
    echo "🔦 Connect to interactive shell"
    docker exec -it  -w "${WORKDIR}" "${NAMEPREFIX}-${UNIQUE_ID}" /bin/bash
}

function try() {
    # Copies the freshly built wrapper into your actual Blender/Bonsai
    # installation for manual, in-Blender testing. This is a human-only
    # convenience: it overwrites files in your live Blender setup, so it's
    # not something that should run unattended as part of an automated or
    # AI-driven build/test loop (which should instead copy the wrapper into
    # the repo's own src/ifcopenshell-python/ifcopenshell/ - see SKILL.md).
    echo "🚴 Copying build artifacts into your Blender resource folder for testing"

    if [[ -z "${BLENDER_USER_RESOURCE:-}" ]]; then
        echo "❌ BLENDER_USER_RESOURCE is not set in .env."
        echo "   Add a line pointing at wherever Blender's user resource folder for"
        echo "   the Bonsai extension actually is on your system, e.g.:"
        echo "     BLENDER_USER_RESOURCE=~/.config/blender/bonsai/"
        return 1
    fi

    # Normalise: expand a leading ~ (in case it was quoted in .env and so
    # never went through shell tilde-expansion when set_env sourced it),
    # then resolve to an absolute, symlink-free path.
    local resource="${BLENDER_USER_RESOURCE/#\~/$HOME}"
    resource="$(realpath -m "$resource")"

    local install_dir="../build/Linux/x86_64/install"
    local py_dirs=("$install_dir"/python-*)
    if [[ ${#py_dirs[@]} -gt 1 && -n "${PY_TGT:-}" ]]; then
        # PY_TGT is compact (py-311); the install dirs are dotted
        # (python-3.11.8) - reinsert the dot (assumes a single-digit major
        # version, true for the Python 3.x line) before matching.
        local py_tgt_digits="${PY_TGT#py-}"
        local py_tgt_dotted="${py_tgt_digits:0:1}.${py_tgt_digits:1}"
        local filtered=() d
        for d in "${py_dirs[@]}"; do
            [[ "$(basename "$d")" == "python-${py_tgt_dotted}."* ]] && filtered+=("$d")
        done
        [[ ${#filtered[@]} -gt 0 ]] && py_dirs=("${filtered[@]}")
    fi
    if [[ ${#py_dirs[@]} -ne 1 || ! -d "${py_dirs[0]}" ]]; then
        echo "❌ Expected exactly one built python-* dir under $install_dir, found ${#py_dirs[@]}."
        echo "   Run 'build' first, or set PY_TGT in .env to disambiguate a multi-version build."
        return 1
    fi

    local py_minor
    py_minor="$(basename "${py_dirs[0]}" | grep -oE '[0-9]+\.[0-9]+')"
    local wrapper_dir="${py_dirs[0]}/lib/python${py_minor}/site-packages/ifcopenshell"
    if [[ ! -f "$wrapper_dir/ifcopenshell_wrapper.py" ]]; then
        echo "❌ Built wrapper not found at $wrapper_dir - run 'build' first."
        return 1
    fi

    local target="$resource/extensions/.local/lib/python${py_minor}/site-packages/ifcopenshell"
    mkdir -p "$target"
    cp "$wrapper_dir"/_ifcopenshell_wrapper*.so "$target/"
    cp "$wrapper_dir"/ifcopenshell_wrapper.py "$target/"
    echo "✅ Copied wrapper into $target"
}

function clean() {
    # Host-side only - doesn't touch the container, image, or ccache volume.
    echo "💎 Clean the build and output folder up"
    if [[ -d "../build" ]]; then
        rm -rf ../build
    fi
    if [[ -d "../output" ]]; then
        rm -rf ../output
    fi
}


function help() {
    cat <<EOF
Usage: ./$SCRIPT_NAME <command>

Available commands:
  create      Build the rocky9-based image
  update      Rebuild the image fresh, picking up OS package updates
  up          Create the container if it doesn't exist yet, and start it
  down        Remove the container entirely (docker compose down)
  stop        Stop the container without removing it
  start       Start a previously-stopped container
  restart     stop, then start (same container, no recreation)
  recreate    down, then up (fresh container)
  build       Execute the IfcOpenShell build
  attach      Connect to an interactive shell in the container
  try         Copy the built wrapper into your Blender resource folder
              (human-only - see BLENDER_USER_RESOURCE below, and SKILL.md
              for the AI/automated-testing equivalent)
  clean       Remove the build and output folders
  logs        Follow container logs
  ps          Show running containers
  config      Validate and show compose config
  remove      Remove stopped containers (docker compose rm)
  help        Show this help

Environment variables from .env are automatically loaded, including:
  PY_TGT                  Restrict the build to one Python version, e.g. py-311
  UNIQUE_ID               Recalculated automatically on every 'up', don't set by hand
  BLENDER_USER_RESOURCE   Where 'try' copies the wrapper for manual testing, e.g.
                          ~/.config/blender/bonsai/
EOF
}

# ================= MAIN =================

case "$1" in
    create)         create ;;
    update)         update ;;
    up)             up "${@:2}" ;;
    down)           down "${@:2}" ;;
    stop)           stop "${@:2}" ;;
    start)          start "${@:2}" ;;
    restart)        restart ;;
    recreate)       recreate ;;
    build)          build "${@:2}" ;;
    attach)         attach ;;
    try)            try ;;
    clean)          clean ;;
    logs)           logs "${@:2}" ;;
    ps)             ps ;;
    config)         config ;;
    remove)         remove ;;
    help|-h|--help) help ;;
    "")
        echo "❌ No command provided."
        help
        ;;
    *)
        echo "❌ Unknown command: $1"
        echo "Type './$SCRIPT_NAME help' for available commands."
        exit 1
        ;;
esac