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

using Sog;
using Sog.Service;
using ProtoCSStruct;
using PF;

namespace Game
{
    public class RandomPathGenerator : IMovePathGenerator
    {
        public void Update(MapActor actor, long nowMs)
        {
            if (actor.move.IsMoving())
            {
                return;
            }

            //75%的概率随机停3-5秒，最多连续停两次

            long nowSec = nowMs / 1000;
            Random rand = GameServerUtils.GetApp().Rand;
            if(actor.move.m_nextPathGenTimeSec > 0 && nowSec - actor.move.m_nextPathGenTimeSec > 0)
            {
                
                if(rand.Next() % 100 < 75)
                {
                    actor.move.m_nextPathGenTimeSec = nowSec + 3 + rand.Next() % 3;
                    actor.move.m_stopPathGenCount++;
                    if(actor.move.m_stopPathGenCount == 3)
                    {
                        GenPath(actor);
                    }
                }
                else
                {
                    GenPath(actor);
                }
            }
            else if(actor.move.m_nextPathGenTimeSec == 0)
            {
                if(rand.Next()%100 < 75)
                {
                    actor.move.m_nextPathGenTimeSec = nowSec + 3 + rand.Next() % 3;
                    actor.move.m_stopPathGenCount++;
                }
                else
                {
                    GenPath(actor);
                }
            }
        }

        private void GenPath(MapActor actor)
        {
            actor.move.m_nextPathGenTimeSec = 0;
            actor.move.m_stopPathGenCount = 0;

            if(actor.map == null)
            {
                TraceLog.Error("RandomPathGenerator.GenPath actor {0} desc {1} no in map inst, mapDesc {2}"
                    , actor.actorId, actor.descId, actor.mapDescId);
                return;
            }

            //
            Vector3 curPosV = MoveUtils.GetVector3FromPosition(actor.position);

            ABPathWrap path = new ABPathWrap();
            path.InitRandomPath(curPosV);

            bool bSucc = actor.map.pathfinding.Search(path);
            path.Close();

            List<Vector3> result = path.Result;

            if(bSucc && result.Count > 0)
            {
                TraceLog.Trace("RandomPathGenerator.GenPath actor {0} desc {1} gen path {2} {3}");

                foreach(var dstPos in result)
                {
                    MoveController.AddPathPoint(actor, MoveUtils.GetPositionFromVector3(dstPos));
                }
            }
        }

    }
}