#!/usr/bin/env bash
# serve-wiki: Launch localhost wiki dashboard for the Data Room
# Starts Express server, opens browser (WSL-aware), stays alive until Ctrl+C

set -euo pipefail

ROOM_DIR="${ROOM_DIR:-./room}"
PREFERRED_PORT="${1:-8421}"
MAX_PORT=8430

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# ── Static export (--export): generate export/wiki/ and exit (no server) ──
# Runs BEFORE the port logic. Previously documented in commands/wiki.md but never
# implemented (the arg was treated as a port). Now it is real.
if [ "${1:-}" = "--export" ]; then
  exec node "${SCRIPT_DIR}/../lib/wiki/wiki-export.cjs" "$ROOM_DIR"
fi

# ── Step 1: Find available port ──
find_port() {
  local port="$1"
  local max="$2"
  while [ "$port" -le "$max" ]; do
    if python3 -c "import socket; s=socket.socket(); s.bind(('',${port})); s.close()" 2>/dev/null; then
      echo "$port"
      return 0
    fi
    port=$((port + 1))
  done
  return 1
}

PORT=$(find_port "$PREFERRED_PORT" "$MAX_PORT")
if [ -z "$PORT" ]; then
  echo "ERROR: No available port in range ${PREFERRED_PORT}-${MAX_PORT}"
  exit 1
fi

# ── Step 2: Start wiki server in background ──
SERVER_PID=""
cleanup() {
  if [ -n "$SERVER_PID" ] && kill -0 "$SERVER_PID" 2>/dev/null; then
    kill "$SERVER_PID" 2>/dev/null || true
    wait "$SERVER_PID" 2>/dev/null || true
  fi
  echo ""
  echo "Wiki stopped."
}
trap cleanup EXIT INT TERM

node "${SCRIPT_DIR}/../lib/wiki/wiki-server.cjs" "$ROOM_DIR" "$PORT" &
SERVER_PID=$!

# Brief pause to let server start
sleep 0.5

# Verify server started
if ! kill -0 "$SERVER_PID" 2>/dev/null; then
  echo "ERROR: Failed to start wiki server on port ${PORT}"
  exit 1
fi

# ── Step 3: Open browser (cross-platform) ──
URL="http://localhost:${PORT}/wiki"

open_browser() {
  local url="$1"
  if grep -qi microsoft /proc/version 2>/dev/null; then
    # WSL: use Windows browser
    cmd.exe /c start "" "$url" 2>/dev/null || true
  elif [ "$(uname)" = "Darwin" ]; then
    open "$url" 2>/dev/null || true
  elif command -v xdg-open >/dev/null 2>&1; then
    xdg-open "$url" >/dev/null 2>&1 &
  else
    echo "Open ${url} in your browser"
  fi
}

open_browser "$URL"

# ── Step 4: Print status ──
echo ""
echo "Wiki running at ${URL} (PID: ${SERVER_PID})"
echo "Press Ctrl+C to stop"
echo ""

# ── Step 5: Wait for server process ──
wait "$SERVER_PID"