#!/usr/bin/env bash
set -euo pipefail

# .claude-plugin/marketplace.json is apm's compiled Claude marketplace output (see
# apm.yml's marketplace.outputs.claude). GitHub Copilot CLI's manifest lookup accepts
# that same file at .claude-plugin/marketplace.json directly, but also has a legacy
# convention path at .github/plugin/marketplace.json (see
# plugins/kyberforge/docs/research/docs/github-copilot-plugins/marketplace.md) -- and
# CONTEXT.md documents that path as a mirror of the Claude output, not a separate apm
# output profile (apm only ships "claude" and "codex" mappers; codex writes a
# differently-shaped file to .agents/plugins/marketplace.json, not this path). This
# script keeps that legacy mirror byte-identical to .claude-plugin/marketplace.json
# instead of letting it silently drift (see issue #90 comment thread).

REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || pwd)"
SRC="$REPO_ROOT/.claude-plugin/marketplace.json"
DST="$REPO_ROOT/.github/plugin/marketplace.json"

usage() {
  echo "Usage: $0 [--check]" >&2
  exit 1
}

CHECK=0
if [[ "${1:-}" == "--check" ]]; then
  CHECK=1
  shift
fi
[[ $# -eq 0 ]] || usage

if [[ ! -f "$SRC" ]]; then
  exit 0
fi

if [[ "$CHECK" -eq 1 ]]; then
  if [[ ! -f "$DST" ]] || ! diff -q "$SRC" "$DST" >/dev/null 2>&1; then
    echo "DRIFT $DST: out of sync with .claude-plugin/marketplace.json" >&2
    echo "Fix: bash scripts/sync-marketplace-mirror.sh" >&2
    exit 1
  fi
  exit 0
fi

mkdir -p "$(dirname "$DST")"
cp "$SRC" "$DST"