using System;
using System.Collections;
using AibisDream.Framework;
using UnityEngine.PlayerLoop;

namespace AibisDream.FixSystem
{
    public class FixStateMachine
    {
        private IState _curState;
        private string _curArgs;

        public void SwitchState(FixState nextState, string args = "")
        {
            _curArgs = args;
            
            _curState?.Exit();
            
            GameLoopManager.Instance.UpdateFixState(nextState, _curArgs);
            _curState = CreateState(nextState, _curArgs);
            _curState.Enter();
        }

        private static IState CreateState(FixState nextState, string args)
        {
            IState res = nextState switch
            {
                FixState.Clinic => new ClinicState(),
                FixState.Engine => new EngineState(),
                FixState.CoolingMachine => new CoolingMachineState(),
                FixState.BodyModule => new BodyModuleState(),
                FixState.Memory => new MemoryState(),
                FixState.Eye => new EyeState(),
                FixState.UF => new UfState(),
                FixState.Gear => new GearState(),
                _ => new ClinicState()
            };
            
            res.SetArgs(args);
            return res;
        }
    }

    public interface IState
    {
        public FixState GetState { get; }
        public void SetArgs(string args);
        public IEnumerator Enter();
        public IEnumerator Exit();
    }

    public class ClinicState : IState
    {
        public FixState GetState => FixState.Clinic;

        public void SetArgs(string args)
        {
            // 无
        }

        public IEnumerator Enter()
        {
            // 切换相机
            yield break;
        }

        public IEnumerator Exit()
        {
            // 似乎没有？
            yield break;
        }
    }

    public class BodyModuleState : IState
    {
        public FixState GetState => FixState.BodyModule;
        
        public void SetArgs(string args)
        {
            // 无
        }

        public IEnumerator Enter()
        {
            // 切换相机
            yield break;
        }

        public IEnumerator Exit()
        {
            // 似乎没有？
            yield break;
        }
    }

    public class GearState : IState
    {
        public FixState GetState => FixState.Gear;
        
        private string _configKey;
        
        public void SetArgs(string args)
        {
            _configKey = args;
        }

        public IEnumerator Enter()
        {
            // 切换相机
            yield break;
        }

        public IEnumerator Exit()
        {
            // 切换相机
            yield break;
        }
    }

    public class EngineState : IState
    {
        public FixState GetState => FixState.Engine;
        
        public void SetArgs(string args)
        {
            // 无
        }

        public IEnumerator Enter()
        {
            // 切换相机
            yield break;
            // 加载Level
            
            // 解锁
            
        }

        public IEnumerator Exit()
        {
            // 上锁
            
            // 切换相机
            yield break;
        }
    }

    public class CoolingMachineState : IState
    {
        public FixState GetState => FixState.CoolingMachine;

        public void SetArgs(string args)
        {
            throw new NotImplementedException();
        }

        public IEnumerator Enter()
        {
            throw new NotImplementedException();
        }

        public IEnumerator Exit()
        {
            throw new NotImplementedException();
        }
    }

    public class UfState : IState
    {
        public FixState GetState => FixState.UF;
        
        public void SetArgs(string args)
        {
            throw new NotImplementedException();
        }

        public IEnumerator Enter()
        {
            throw new NotImplementedException();
        }

        public IEnumerator Exit()
        {
            throw new NotImplementedException();
        }
    }

    public class EyeState : IState
    {
        public FixState GetState => FixState.Eye;
        
        public void SetArgs(string args)
        {
            throw new NotImplementedException();
        }

        public IEnumerator Enter()
        {
            throw new NotImplementedException();
        }

        public IEnumerator Exit()
        {
            throw new NotImplementedException();
        }
    }

    public class MemoryState : IState
    {
        public FixState GetState => FixState.Memory;
        
        public void SetArgs(string args)
        {
            throw new NotImplementedException();
        }

        public IEnumerator Enter()
        {
            throw new NotImplementedException();
        }

        public IEnumerator Exit()
        {
            throw new NotImplementedException();
        }
    }
}