#!/usr/bin/env bash
# gstack setup — build browser binary + register all skills with Claude Code
set -e

GSTACK_DIR="$(cd "$(dirname "$0")" && pwd)"
SKILLS_DIR="$(dirname "$GSTACK_DIR")"
BROWSE_BIN="$GSTACK_DIR/browse/dist/browse"

# 1. Build browse binary if needed
NEEDS_BUILD=0
if [ ! -x "$BROWSE_BIN" ]; then
  NEEDS_BUILD=1
elif [ -n "$(find "$GSTACK_DIR/browse/src" -type f -newer "$BROWSE_BIN" -print -quit 2>/dev/null)" ]; then
  NEEDS_BUILD=1
elif [ "$GSTACK_DIR/package.json" -nt "$BROWSE_BIN" ]; then
  NEEDS_BUILD=1
elif [ -f "$GSTACK_DIR/bun.lock" ] && [ "$GSTACK_DIR/bun.lock" -nt "$BROWSE_BIN" ]; then
  NEEDS_BUILD=1
fi

if [ "$NEEDS_BUILD" -eq 1 ]; then
  echo "Building browse binary..."
  (
    cd "$GSTACK_DIR"
    bun install
    bun run build
  )
fi

if [ ! -x "$BROWSE_BIN" ]; then
  echo "gstack setup failed: browse binary missing at $BROWSE_BIN" >&2
  exit 1
fi

# 2. Only register skills if we're inside a .claude/skills directory
# Uses real directory copies instead of symlinks so skills are discoverable
# by Claude Desktop, which mounts ~/.claude/skills/ but does not follow symlinks.
SKILLS_BASENAME="$(basename "$SKILLS_DIR")"
if [ "$SKILLS_BASENAME" = "skills" ]; then
  registered=()
  for skill_dir in "$GSTACK_DIR"/*/; do
    if [ -f "$skill_dir/SKILL.md" ]; then
      skill_name="$(basename "$skill_dir")"
      # Skip node_modules
      [ "$skill_name" = "node_modules" ] && continue
      target="$SKILLS_DIR/$skill_name"
      # Remove any existing symlink or stale copy, then copy fresh
      rm -rf "$target"
      cp -Rf "$GSTACK_DIR/$skill_name" "$target"
      registered+=("$skill_name")
    fi
  done

  echo "gstack ready."
  echo "  browse: $BROWSE_BIN"
  if [ ${#registered[@]} -gt 0 ]; then
    echo "  registered skills: ${registered[*]}"
  fi
else
  echo "gstack ready."
  echo "  browse: $BROWSE_BIN"
  echo "  (skipped skill registration — not inside .claude/skills/)"
fi