using System.Collections.Generic;
using System.Linq;
using Cysharp.Threading.Tasks;

namespace Stary.Evo.StoryEditor
{
    public class FlowNodePlayer : NodePlayer
    {
        public new FlowNodeData Data;
        
        public List<NodePlayer> Pre = new();
        public List<NodePlayer> Next = new();
        
        /// <summary>
        /// 后续连接执行类型
        /// </summary>
        public NodeExecuteType ExecuteType;

        public FlowNodePlayer(GraphPlayer graph, FlowNodeData data) : base(graph, data)
        {
            Data = data;
            ExecuteType = data.executeType;
        }
        
        public override bool Connect()
        {
            if(!base.Connect())
                return false;
            
            Data.pre.ForEach(index => Pre.Add(Graph.Nodes[index]));
            Data.next.ForEach(index => Next.Add(Graph.Nodes[index]));
            Next.ForEach(node => node.Connect());

            return true;
        }
        
        /// <summary>
        /// 开始执行
        /// </summary>
        public override async UniTask Execute()
        {
            await base.Execute();
            await MoveNext();
        }

        /// <summary>
        /// 向下继续执行
        /// </summary>
        public override async UniTask MoveNext()
        {
            // 异步执行（并行）
            if (ExecuteType == NodeExecuteType.Async)
            {
                Next.ForEach(node => node?.Execute());
            }
            // 同步执行（串行）
            else
            {
                foreach (var node in Next.Where(node => node != null))
                {
                    await node.Execute();
                }
            }
        }
    }
}