using UnityEngine;
using WI;
using System;
using System.Collections.Generic;
using System.Linq;

namespace CHN
{
    public class CHNRaycaster : MonoBehaviour, ISingle
    {
        OrbitalController controller;
        public List<Machine> machines = new List<Machine>();
        public Machine currentClickMachine;

        RaycastHit[] hitInfo = new RaycastHit[16];

        RaycastHit hit;

        public event Action<Machine> onLeftClickMachine;
        public event Action onClickThermostat;

        public LayerMask floorLayers;
        public int hitFloorIndex;

        public override void AfterAwake()
        {
            controller = FindSingle<OrbitalController>();
        }
        public override void AfterStart()
        {
            var building = FindSingle<Building>();
            machines = building.floors.SelectMany(f => f.machines).ToList();
        }

        private void Update()
        {
            //RaycastOnClickThermostat();
            RaycastOnClickMachine();
        }

        private void RaycastOnClickMachine()
        {
            var floorMachines = FindSingle<Building>().currentFloor.machines;

            bool leftClick = Input.GetMouseButtonDown(0);

            if (!leftClick)
            {
                return;
            }

            if (controller.IsClickUI)
                return;

            LayerMask exceptionLayer = LayerMask.GetMask("Floor", "Floor Ground");
            LayerMask layerMask = floorLayers & ~exceptionLayer;

            Ray ray = controller.camera.ScreenPointToRay(Input.mousePosition);
            hitInfo = Physics.RaycastAll(ray, Mathf.Infinity, layerMask);

            if (hitInfo.Length == 0)
                return;

            Array.Sort(hitInfo, (hit1, hit2) => hit1.distance.CompareTo(hit2.distance));
            var hitColider = hitInfo[0].collider;

            hitColider.TryGetComponent<Machine>(out var machine);

            foreach (var floorMachine in floorMachines)
            {
                if(floorMachine == machine)
                {
                    if (leftClick)
                    {
                        onLeftClickMachine?.Invoke(machine);
                    }
                }
            }
        }

        private void RaycastOnClickThermostat()
        {
            bool leftClick = Input.GetMouseButtonDown(0);

            if (!leftClick)
            {
                return;
            }

            if (controller.IsClickUI)
            {
                return;
            }

            var layerMask = LayerMask.GetMask("Thermostat");
            var ray = controller.camera.ScreenPointToRay(Input.mousePosition);
            hitInfo = Physics.RaycastAll(ray, Mathf.Infinity, layerMask);

            if (hitInfo.Length == 0)
                return;

            Array.Sort(hitInfo, (hit1, hit2) => hit1.distance.CompareTo(hit2.distance));
            var hitColider = hitInfo[0].collider;

            var board = hitColider.GetComponent<Thermostat>();

            if (leftClick)
            {
                onClickThermostat?.Invoke();
            }
        }
    }
}