#!/bin/bash

# LXS - platform dispatcher (POSIX side)
# Description: Thin shim kept at the repo root so the documented install URL
#              and the /usr/local/bin/lxs symlink stay stable while the real
#              implementation lives in linux/lxs.sh.
# Repo: https://git.hyko.cx/hykocx/lxs
# License: MIT

LXS_REPO_URL="${LXS_REPO_URL:-https://git.hyko.cx/hykocx/lxs}"
LXS_BRANCH="${LXS_BRANCH:-main}"
export LXS_RAW_BASE="${LXS_RAW_BASE:-${LXS_REPO_URL}/raw/branch/${LXS_BRANCH}}"

# Platform sub-tree to dispatch into. Only linux/ ships today; the darwin
# branch is here so a macos/ tree drops in without touching this file.
case "$(uname -s 2>/dev/null)" in
    Linux)  LXS_PLATFORM_DIR="linux" ;;
    Darwin) LXS_PLATFORM_DIR="macos" ;;
    *)      LXS_PLATFORM_DIR="linux" ;;
esac

# Locate a sibling <platform>/lxs.sh (repo checkout or installed layout).
_lxs_self_dir=""
if [ -n "${BASH_SOURCE[0]:-}" ]; then
    _lxs_resolved=$(readlink -f "${BASH_SOURCE[0]}" 2>/dev/null) \
        || _lxs_resolved=$(realpath "${BASH_SOURCE[0]}" 2>/dev/null) \
        || _lxs_resolved="${BASH_SOURCE[0]}"
    [ -f "$_lxs_resolved" ] && _lxs_self_dir=$(dirname "$_lxs_resolved")
    unset _lxs_resolved
fi

if [ -n "$_lxs_self_dir" ] && [ -f "${_lxs_self_dir}/${LXS_PLATFORM_DIR}/lxs.sh" ]; then
    exec bash "${_lxs_self_dir}/${LXS_PLATFORM_DIR}/lxs.sh" "$@"
fi

# No files on disk — we were piped from curl. Fetch the platform entrypoint.
if ! command -v curl >/dev/null 2>&1; then
    echo "lxs: curl is required to bootstrap ${LXS_PLATFORM_DIR}/lxs.sh" >&2
    exit 1
fi

_lxs_tmp=$(mktemp "/tmp/lxs.entrypoint.XXXXXX.sh") || exit 1
if ! curl -fsSL -H "Cache-Control: no-cache" \
    -o "$_lxs_tmp" "${LXS_RAW_BASE}/${LXS_PLATFORM_DIR}/lxs.sh"; then
    echo "lxs: failed to fetch ${LXS_RAW_BASE}/${LXS_PLATFORM_DIR}/lxs.sh" >&2
    rm -f "$_lxs_tmp"
    exit 1
fi

bash "$_lxs_tmp" "$@"
_lxs_rc=$?
rm -f "$_lxs_tmp"
exit $_lxs_rc