using System.Collections.Concurrent;

namespace etoy
{
    class CmdExportClientCode : Command
    {
        private readonly List<Exception> _errors = new List<Exception>();
        ConcurrentQueue<string> _dones = new ConcurrentQueue<string>();
        int _totalStage;

        public override string Description => "生成客户端的CSharp代码";

        protected override void OnProcess()
        {
            _dones.Clear();

            var generaters = new IGenerater[]
            {
                new CSharpCommonTableGenerater(),
                new CSharpCommonTableRepositoryGenerater(),
                new CSharpKeyValueTableGenerater(),
                new CSharpGuideTargetKeyGenerater(),
                new CSharpMetadataTableGenerater(),
                new CSharpVersionConfigGenerater(),
                new CSharpTableLoaderGenerater(),
                new TxtVersionConfigGenerater(),
            };

            _totalStage = generaters.Length;

            foreach (IGenerater generater in generaters)
                Task.Factory.StartNew(OnThreadGen, generater);

            Task.Factory.StartNew(OnLoop);
            Task.Factory.StartNew(OnThreadLoop);
        }

        private void OnThreadLoop()
        {
            while (_dones.Count < _totalStage)
                Thread.Sleep(10);

            Completed();
        }

        private void OnThreadGen(object state)
        {
            try
            {
                var generater = state as IGenerater;

                generater.Generate(Context);

                _dones.Enqueue(generater.GetType().Name);

                SetProgress(_dones.Count / (float)_totalStage);
            }
            catch (Exception e)
            {
                --_totalStage;
                _errors.Add(e);
            }
        }

        private void OnLoop()
        {
            while (_dones.Count < _totalStage)
            {
                Thread.Sleep(1);
            }

            if (_errors.Count > 0)
            {
                SetException(new Exception(string.Join('\n', (from e in _errors select $"## ERROR: {e}").ToArray())));
            }
            else
            {
                Completed();
            }
        }

    }
}