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

is_complete_gstack_source() {
  local root="$1"
  [ -f "$root/package.json" ] &&
    [ -f "$root/browse/src/cli.ts" ] &&
    [ -f "$root/browse/dist/server-node.mjs" ] &&
    [ -f "$root/node_modules/playwright/package.json" ] &&
    [ -f "$root/node_modules/diff/package.json" ]
}

normalize_candidate() {
  local candidate="$1"
  if command -v cygpath >/dev/null 2>&1; then
    candidate="$(cygpath -u "$candidate" 2>/dev/null || printf '%s' "$candidate")"
  fi
  (cd "$candidate" 2>/dev/null && pwd -P) || true
}

SOURCE_ROOT=""
if [ -n "${GSTACK_SOURCE_ROOT:-}" ]; then
  SOURCE_ROOT="$(normalize_candidate "$GSTACK_SOURCE_ROOT")"
  if [ -z "$SOURCE_ROOT" ] || ! is_complete_gstack_source "$SOURCE_ROOT"; then
    echo "ERROR: GSTACK_SOURCE_ROOT does not contain a complete gstack source install: $GSTACK_SOURCE_ROOT" >&2
    exit 2
  fi
else
  SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
  for candidate in \
    "$SCRIPT_DIR/../.." \
    "$HOME/.gstack/repos/gstack" \
    "$HOME/.claude/skills/gstack" \
    "$HOME/.codex/skills/gstack"; do
    resolved="$(normalize_candidate "$candidate")"
    if [ -n "$resolved" ] && is_complete_gstack_source "$resolved"; then
      SOURCE_ROOT="$resolved"
      break
    fi
  done
fi

if [ -z "$SOURCE_ROOT" ]; then
  echo "ERROR: no complete gstack source install was found." >&2
  echo "Expected browse/src/cli.ts, browse/dist/server-node.mjs, and installed dependencies." >&2
  echo "Set GSTACK_SOURCE_ROOT to the full gstack checkout and retry." >&2
  exit 2
fi

if ! command -v bun >/dev/null 2>&1; then
  echo "ERROR: Bun is required for the Windows gstack browser launcher." >&2
  exit 3
fi

if ! command -v node >/dev/null 2>&1; then
  echo "ERROR: Node.js is required for the Windows gstack browser server." >&2
  exit 3
fi

cd "$SOURCE_ROOT"
exec bun run "$SOURCE_ROOT/browse/src/cli.ts" "$@"