#!/usr/bin/env bash

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
LOG_DIR="$SCRIPT_DIR/logs"
PID_FILE="$LOG_DIR/server.pid"
LOG_FILE="$LOG_DIR/server.log"

mkdir -p "$LOG_DIR"

PORT="${PORT:-}"
if [[ -z "$PORT" && -f "$SCRIPT_DIR/.env" ]]; then
  PORT="$(grep -E '^PORT=' "$SCRIPT_DIR/.env" | tail -n 1 | cut -d '=' -f 2- | tr -d '\r' || true)"
fi
PORT="${PORT:-5000}"

find_project_server_pids() {
  pgrep -f "node src/server.js" | while read -r pid; do
    [[ -n "$pid" ]] || continue
    [[ -d "/proc/$pid" ]] || continue

    local cwd
    cwd="$(readlink -f "/proc/$pid/cwd" 2>/dev/null || true)"
    if [[ "$cwd" == "$SCRIPT_DIR" ]]; then
      echo "$pid"
    fi
  done
}

stop_existing_server() {
  local pids
  pids="$(find_project_server_pids || true)"

  if [[ -z "$pids" ]]; then
    echo "No existing server process found for $SCRIPT_DIR"
    return
  fi

  echo "Stopping existing server process(es): $pids"
  while read -r pid; do
    [[ -n "$pid" ]] || continue
    kill "$pid" 2>/dev/null || true
  done <<< "$pids"

  sleep 2

  local remaining
  remaining="$(find_project_server_pids || true)"
  if [[ -n "$remaining" ]]; then
    echo "Force killing remaining process(es): $remaining"
    while read -r pid; do
      [[ -n "$pid" ]] || continue
      kill -9 "$pid" 2>/dev/null || true
    done <<< "$remaining"
  fi
}

start_server() {
  cd "$SCRIPT_DIR"
  echo "Starting server from $SCRIPT_DIR on port $PORT"
  nohup node src/server.js >> "$LOG_FILE" 2>&1 &
  local pid=$!
  echo "$pid" > "$PID_FILE"
  echo "Started PID: $pid"
}

show_status() {
  sleep 2
  echo
  echo "Active project server process(es):"
  find_project_server_pids || true
  echo
  echo "Port check:"
  ss -lntp 2>/dev/null | grep ":$PORT" || true
  echo
  echo "Recent log output:"
  tail -n 30 "$LOG_FILE" 2>/dev/null || true
}

stop_existing_server
start_server
show_status