using System;

namespace EasyChart
{
    public static class ProPackage
    {
        private static bool? s_isInstalled;

        public static bool IsInstalled
        {
            get
            {
                if (s_isInstalled.HasValue) return s_isInstalled.Value;
                const string bootstrapTypeName = "EasyChart.Pro.EasyChartProBootstrap";
                var assemblies = AppDomain.CurrentDomain.GetAssemblies();
                for (int i = 0; i < assemblies.Length; i++)
                {
                    var assembly = assemblies[i];
                    if (assembly == null) continue;

                    var type = assembly.GetType(bootstrapTypeName, false);
                    if (type != null)
                    {
                        s_isInstalled = true;
                        return true;
                    }
                }

                s_isInstalled = false;
                return s_isInstalled.Value;
            }
        }
    }
}