using System;
using Movement;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Player
{
    public class PlayerController : MonoBehaviour, IMovement, Input.PlayerInput.IPlayerControlActions
    {
        private const float DefaultJumpForce = 784.0f;
        private const float DefaultMass = 80.0f;
        private const float DefaultSpeed = 500.0f;
        private const float GravityScale = 1.0f;

        private Input.PlayerInput _controls;
        private Rigidbody2D _playerRigidbody2D;
        private SpriteRenderer _playerSpriteRenderer;
        private CollisionChecker _playerGroundTrigger;

        private bool _moveKeyPressed;
        private bool _jumpKeyPressed;

        private bool _isOnAir;

        private float _xAxisValue;

        private void Awake()
        {
            this._playerRigidbody2D = gameObject.GetComponent<Rigidbody2D>();
            this._playerGroundTrigger = GameObject.Find("PlayerGroundTrigger").GetComponent<CollisionChecker>();
            this._playerSpriteRenderer = gameObject.GetComponent<SpriteRenderer>();
        }

        private void Start()
        {
            this._playerRigidbody2D.gravityScale = GravityScale;
            this._playerRigidbody2D.mass = DefaultMass;
            BaseSpeed = DefaultSpeed;
        }

        private void OnEnable()
        {
            if (_controls == null)
            {
                _controls = new Input.PlayerInput();
                _controls.PlayerControl.SetCallbacks(this);
            }

            _controls.PlayerControl.Enable();
        }

        private void OnDisable()
        {
            _controls.Disable();
        }

        private void FixedUpdate()
        {
            if (_moveKeyPressed)
                Move(_xAxisValue);
            else
                _playerRigidbody2D.velocity = new Vector2(0.0f, _playerRigidbody2D.velocity.y);

            if (_jumpKeyPressed && _playerGroundTrigger.IsCollided)
                Jump();
        }

        // PAUSE METHODS

        public bool IsPaused { get; private set; }

        public void Pause()
        {
            IsPaused = true;
        }

        public void Resume()
        {
            IsPaused = false;
        }

        // MOVE METHODS

        public float BaseSpeed { get; set; }

        public void Move(float value)
        {
            switch (_xAxisValue)
            {
                case < 0:
                    _playerSpriteRenderer.flipX = true;
                    break;
                case > 0:
                    _playerSpriteRenderer.flipX = false;
                    break;
            }

            _playerRigidbody2D.velocity = new Vector2(BaseSpeed * _xAxisValue * Time.fixedDeltaTime,
                _playerRigidbody2D.velocity.y);
        }

        private void Jump()
        {
            _playerRigidbody2D.velocity = new Vector2(_playerRigidbody2D.velocity.x, 0);
            _playerRigidbody2D.AddForce(Vector2.up.normalized * DefaultJumpForce, ForceMode2D.Impulse);
        }

        private void Climb()
        {
            throw new NotImplementedException();
        }

        // INPUT HANDLING

        public void OnMove(InputAction.CallbackContext context)
        {
            switch (context.canceled)
            {
                case true:
                    _moveKeyPressed = false;
                    break;
                case false:
                    _moveKeyPressed = true;
                    _xAxisValue = context.ReadValue<float>();
                    break;
            }
        }

        public void OnJump(InputAction.CallbackContext context)
        {
            switch (context.canceled)
            {
                case true:
                    _jumpKeyPressed = false;
                    break;
                case false:
                    _jumpKeyPressed = true;
                    break;
            }
        }
    }
}