#!/usr/bin/env bash
# Portable AetherForge / forge-mesh command deck launcher (USB edition).
# Starts optional cloudflared sidecar, sets AF_TUNNEL_EXTERNAL=1, opens the deck UI,
# and runs forge-mesh-server against ./data.
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
if [[ "$(basename "$SCRIPT_DIR")" == "scripts" ]]; then
  ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
else
  ROOT="$SCRIPT_DIR"
fi
cd "$ROOT"

DATA_DIR="${AF_DATA_DIR:-$ROOT/data}"
CONFIG="${AF_CONFIG:-$DATA_DIR/config.json}"
SERVER_BIN="${AF_SERVER_BIN:-$ROOT/bin/forge-mesh-server}"
DECK_URL="${AF_DECK_URL:-http://localhost:8989}"
CLOUDFLARED_PID=""

cleanup() {
  if [[ -n "$CLOUDFLARED_PID" ]] && kill -0 "$CLOUDFLARED_PID" 2>/dev/null; then
    kill "$CLOUDFLARED_PID" 2>/dev/null || true
    wait "$CLOUDFLARED_PID" 2>/dev/null || true
  fi
}
trap cleanup EXIT INT TERM

resolve_cloudflared() {
  if command -v cloudflared >/dev/null 2>&1; then
    command -v cloudflared
    return 0
  fi
  for candidate in "$ROOT/bin/cloudflared" "$ROOT/cloudflared"; do
    if [[ -x "$candidate" ]]; then
      echo "$candidate"
      return 0
    fi
  done
  return 1
}

read_tunnel_token() {
  if [[ -n "${AF_TUNNEL_TOKEN:-}" ]]; then
    printf '%s' "$AF_TUNNEL_TOKEN"
    return 0
  fi
  local token_file="$DATA_DIR/cloudflared-token.txt"
  if [[ -f "$token_file" ]]; then
    tr -d '[:space:]' <"$token_file"
    return 0
  fi
  return 1
}

start_tunnel_sidecar() {
  local token cf_bin
  token="$(read_tunnel_token)" || return 0
  cf_bin="$(resolve_cloudflared)" || {
    echo "WARN: tunnel token present but cloudflared not found (PATH or $ROOT/bin/cloudflared)" >&2
    return 0
  }

  echo "Starting cloudflared sidecar..."
  "$cf_bin" tunnel --no-autoupdate run --token "$token" &
  CLOUDFLARED_PID=$!
  export AF_TUNNEL_EXTERNAL=1
  echo "AF_TUNNEL_EXTERNAL=1 (cloudflared pid $CLOUDFLARED_PID)"
}

open_browser() {
  local url="$1"
  if [[ -n "${AF_NO_BROWSER:-}" ]]; then
    echo "AF_NO_BROWSER set; deck at $url"
    return 0
  fi
  for opener in xdg-open sensible-browser x-www-browser gnome-open kde-open; do
    if command -v "$opener" >/dev/null 2>&1; then
      "$opener" "$url" >/dev/null 2>&1 &
      return 0
    fi
  done
  echo "Open your browser to $url"
}

ensure_server_binary() {
  if [[ -x "$SERVER_BIN" ]]; then
    return 0
  fi
  if command -v forge-mesh-server >/dev/null 2>&1; then
    SERVER_BIN="$(command -v forge-mesh-server)"
    return 0
  fi
  echo "ERROR: forge-mesh-server not found. Build with 'make server' or place binary in $ROOT/bin/" >&2
  exit 1
}

mkdir -p "$DATA_DIR"
if [[ ! -f "$CONFIG" ]]; then
  echo "ERROR: missing config at $CONFIG" >&2
  exit 1
fi

start_tunnel_sidecar
ensure_server_binary

open_browser "$DECK_URL"
echo "Starting forge-mesh-server (config: $CONFIG)"
exec "$SERVER_BIN" -config "$CONFIG"