#!/usr/bin/env bash
# Runs the mdlp-image to build the mod(s) defined under modding/mods/ (see
# README.md) into modding/dist/mods/, entirely offline - every Go module
# dependency mdlp needs was already fetched into the image by
# ./mdlp-image.sh.
#
# Mounts the whole repository, not just modding/, because mdlp also needs the
# game's own data directory (res/assets/ss_ee/data) as read-only reference
# data (see the root README.md section 3 for how that gets populated).
#
# Usage: MODS="name1 name2" ./mdlp-run-image.sh [command...]
#   With no arguments, runs the image's baked-in process-mods.sh (its default
#   CMD), building every mod under mods/ (or only those named in MODS, if
#   set). Pass a command (e.g. `bash`) to get a shell in the build
#   environment instead, useful for debugging a failed build.
set -euo pipefail

cd "$(dirname "${BASH_SOURCE[0]}")"
MODDING_ROOT="$(pwd)"
REPO_ROOT="$(cd .. && pwd)"

fail() { echo "PREFLIGHT FAIL: $*" >&2; exit 1; }

command -v docker >/dev/null 2>&1 \
    || fail "docker not found in PATH"

IMAGE="${MDLP_REGISTRY_IMAGE:-questshock/mdlp}"
if [ -f "$MODDING_ROOT/../registry.env" ]; then
    # shellcheck disable=SC1091
    source "$MODDING_ROOT/../registry.env"
    IMAGE="${MDLP_REGISTRY_IMAGE:-$IMAGE}"
fi

IMAGE_TAG="$(<"$MODDING_ROOT/mdlp-image/VERSION")"
[ -n "$IMAGE_TAG" ] || fail "mdlp-image/VERSION is empty"
IMAGE="$IMAGE:$IMAGE_TAG"

docker image inspect "$IMAGE" >/dev/null 2>&1 \
    || fail "$IMAGE not found locally - run ./mdlp-image.sh first"

TTY_FLAGS="-i"
[ -t 1 ] && TTY_FLAGS="-it"

# shellcheck disable=SC2086
docker run --rm $TTY_FLAGS \
    -v "$REPO_ROOT:/workspace" \
    -e HOST_UID="$(id -u)" \
    -e HOST_GID="$(id -g)" \
    -e MODS="${MODS:-}" \
    "$IMAGE" \
    "$@"