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

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

        public IEnumerator SwitchState(FixState nextState, string args = "")
        {
            _curArgs = args;
            
            yield return _curState?.Exit();
            
            GameLoopManager.Instance?.UpdateFixState(nextState, _curArgs);
            _curState = CreateState(nextState, _curArgs);
            yield return _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 return CameraKit.Instance.SwitchCamera(FixState.Clinic);
        }

        public IEnumerator Exit()
        {
            // 无
            yield break;
        }
    }

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

        public IEnumerator Enter()
        {
            var bodyModuleSystem = FixSystemCenter.SystemDic.Get<BodyModuleSystem>();
            // 拔出插头
            bodyModuleSystem.ResetPlug();
            // 切换相机
            yield return CameraKit.Instance.SwitchCamera(FixState.BodyModule);
        }

        public IEnumerator Exit()
        {
            var bodyModuleSystem = FixSystemCenter.SystemDic.Get<BodyModuleSystem>();
            // 拔出插头
            bodyModuleSystem.ResetPlug();
            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 return CameraKit.Instance.SwitchCamera(FixState.Gear);
            // 加载关卡数据
            if (!string.IsNullOrEmpty(_configKey))
            {
                var gearSystem = FixSystemCenter.SystemDic.Get<GearSystem>();
                gearSystem.CurDataKey = _configKey;
                gearSystem.LoadLevel();
            }
        }

        public IEnumerator Exit()
        {
            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 return CameraKit.Instance.SwitchCamera(FixState.Engine);
        }

        public IEnumerator Exit()
        {
            var bodyModuleSystem = FixSystemCenter.SystemDic.Get<BodyModuleSystem>();
            bodyModuleSystem.ResetPlug();
            yield break;
        }
    }

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

        public void SetArgs(string args)
        {
            _playLink = !string.IsNullOrEmpty(args);
        }

        public IEnumerator Enter()
        {
            var coolingSystem = FixSystemCenter.SystemDic.Get<CoolingSystem>();
            // 切相机
            yield return CameraKit.Instance.SwitchCamera(FixState.CoolingMachine);
            
            // 打开泵机
            coolingSystem.gameObject.SetActive(true);
            yield return coolingSystem.OpenCoolingSystem();
            // 播放插线动画
            if (_playLink)
            {
                yield return coolingSystem.LinkTube();
            }
        }

        public IEnumerator Exit()
        {
            var cooling = FixSystemCenter.SystemDic.Get<CoolingSystem>();

            yield return cooling.CloseBottleUI();
            yield return cooling.CloseCoolingSystem();
            yield return new WaitForSeconds(1f);
        }
    }

    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();
        }
    }
}