using System;
using UnityEngine;
using UnityEngine.InputSystem;

// ReSharper disable once CheckNamespace
namespace BlueWaterProject
{
    public class UnitSelection : MonoBehaviour
    {
        #region Property and variable

        [Tooltip("선택된 부대")]
        [SerializeField] private UnitController selectedUnitController;
        public UnitController SelectedUnitController
        {
            get => selectedUnitController;
            set
            {
                tempUnitController = selectedUnitController;
                selectedUnitController = value;
                
                if (selectedUnitController == null)
                {
                    if (tempUnitController != null)
                    {
                        foreach (var soldier in tempUnitController.unit.soldierList)
                        {
                            soldier.ResetHighlight();
                        }
                        tempUnitController = null;
                    }
                    
                    GameManager.Inst.DefaultSpeedMode();
                }
                else
                {
                    GameManager.Inst.SlowSpeedMode();
                }
            }
        }

        [SerializeField] private LayerMask unitLayer;
        [SerializeField] private LayerMask groundLayer;

        private UnitController tempUnitController;
        private Camera mainCamera;

        #endregion

        #region Unity built-in function

        private void Reset()
        {
            unitLayer = LayerMask.GetMask("Pirate") | LayerMask.GetMask("Enemy");
            groundLayer = LayerMask.GetMask("Ground");
        }

        private void Awake()
        {
            var controls = new BlueWater();

            controls.Unit.LeftClick.performed += OnLeftClick;
            controls.Unit.RightClick.performed += OnRightClick;
            controls.Enable();
            
            unitLayer = LayerMask.GetMask("Pirate") | LayerMask.GetMask("Enemy");
            groundLayer = LayerMask.GetMask("Ground");
            
            mainCamera = Camera.main;
        }

        #endregion

        #region New input system

        private void OnLeftClick(InputAction.CallbackContext context)
        {
            if (!context.performed) return;

            var ray = mainCamera.ScreenPointToRay(Mouse.current.position.ReadValue());

            if (Physics.Raycast(ray, out var hit, Mathf.Infinity, unitLayer))
            {
                var unitController = hit.collider.transform.parent.GetComponent<UnitController>();
                if (unitController != null)
                {
                    SelectedUnitController = unitController;

                    foreach (var soldier in selectedUnitController.unit.soldierList)
                    {
                        soldier.SelectedHighlight();
                    }
                }
            }
            else
            {
                SelectedUnitController = null;
            }
        }

        private void OnRightClick(InputAction.CallbackContext context)
        {
            if (!context.performed || SelectedUnitController == null) return;

            var ray = mainCamera.ScreenPointToRay(Mouse.current.position.ReadValue());

            if (Physics.Raycast(ray, out var hit, Mathf.Infinity, groundLayer))
            {
                var targetPos = hit.point;
                SelectedUnitController.MoveCommand(targetPos);
                SelectedUnitController = null;
            }
            else
            {
                SelectedUnitController = null;
            }
        }
        
        #endregion
    }
}