using System.Collections.Generic;

namespace NBC
{
    public class RunnerProcess : IProcess
    {
        /// <summary>
        ///     当前运行的任务
        /// </summary>
        protected readonly List<ITask> Coroutines;

        /// <summary>
        ///     当前操作的信息
        /// </summary>
        protected readonly FlushingOperation FlushingOperation;

        /// <summary>
        ///     准备要运行的任务
        /// </summary>
        protected readonly Queue<ITask> ReadyTask;

        /// <summary>
        ///     进程名称
        /// </summary>
        protected string Name;

        public RunnerProcess(string name, List<ITask> coroutines, Queue<ITask> readyTask, FlushingOperation op)
        {
            Name = name;
            Coroutines = coroutines;
            ReadyTask = readyTask;
            FlushingOperation = op;
        }

        public NTaskStatus Process()
        {
            var flag = false;
            if (FlushingOperation.Kill)
            {
                flag = true;
            }
            else
            {
                for (var index = 0; index < ReadyTask.Count; index++)
                {
                    // var task = ReadyTask[0];
                    var task = ReadyTask.Dequeue();
                    Coroutines.Add(task);
                    // ReadyTask.RemoveAt(0);
                }

                if (Coroutines.Count == 0 || FlushingOperation.Paused)
                {
                    flag = false;
                }
                else
                {
                    var index = 0;
                    var mustExit = false;
                    do
                    {
                        var childTask = Coroutines[index];
                        var st = childTask.Process();
                        if (st >= NTaskStatus.Success)
                            Coroutines.RemoveAt(index); //.splice(index, 1);
                        else
                            index++;

                        mustExit = Coroutines.Count == 0 || index >= Coroutines.Count;
                    } while (!mustExit);
                }
            }

            return flag ? NTaskStatus.Success : NTaskStatus.Running;
        }
    }
}