using System;
using System.Collections;
using System.Collections.Generic;
using Management;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Player
{
    [RequireComponent(typeof(Rigidbody2D))]
    public class Movement : MonoBehaviour
    {
        public event Action OnDeath;
        public event Action EnterSpring;
        public event Action GetPickup;
        
        private static readonly int Spring = Animator.StringToHash("spring");
        private static readonly int Grounded = Animator.StringToHash("grounded");
        private static readonly int Speed = Animator.StringToHash("speed");
        private static readonly int Vspeed = Animator.StringToHash("vspeed");
        [SerializeField] private float runSpeed;
        [SerializeField] private float springPower;
        [SerializeField] private float jumpForce;
        [SerializeField] private float airJumpForce;
        [SerializeField] private SpriteRenderer spriteRenderer;
        [SerializeField] private float turnDelay;
        [SerializeField] private float impactPauseTime;
        [SerializeField] private float bouncePower;
        [SerializeField] private Animator animator;
        [SerializeField] private GameObject deathScreenPrefab;
        
        [Header("Audio")]
        [SerializeField] private AudioClip jumpSound;
        [SerializeField] private AudioClip airJumpSound;
        [SerializeField] private AudioClip pickupSound;
        [SerializeField] private AudioClip springSound;
        [SerializeField] private AudioClip bumpSound;
        
        [Header("Wind Sound")]
        [SerializeField] private AudioSource windSound;
        [SerializeField] private float maxSpeedWindSound;
        
        private Animator _springAnimator;
        private Rigidbody2D _rb;
        private bool _grounded = true;
        private bool _facingLeft;
        private float _turnDelayTimer;
        private float _groundedCheckTimer;
        private bool _interact;
        private int _airJumpCharges;
        private bool _jumpPressedThisFrame;
        private bool _fireSpring;
        private bool _jump;
        private bool _airJump;
        private Vector2 _airJumpDir;
        private bool _autoDrive = true;
        private bool _deathArmed;
        private bool _firstSpring;
        
        private void Awake()
        {
            _rb = GetComponent<Rigidbody2D>();
        }
        
        private void Start()
        {
            Cursor.lockState = CursorLockMode.None;
            Cursor.visible = true;
            Services.Instance.InputRouter.OnInteract += HandleInteraction;
        }
        
        private void OnDestroy()
        {
            Services.Instance.InputRouter.OnInteract -= HandleInteraction;
        }
        
        private void HandleInteraction(bool pressed)
        {
            _interact = pressed;
            _jumpPressedThisFrame = _interact;
        }

        private void Update()
        {
            Vector2 mouseScreenPos = Mouse.current.position.ReadValue();

            Vector3 mouseWorldPos = Camera.main.ScreenToWorldPoint(
                new Vector3(mouseScreenPos.x, mouseScreenPos.y, -Camera.main.transform.position.z)
            );

            _airJumpDir = ((Vector2)mouseWorldPos - (Vector2)transform.position).normalized;
            
            _groundedCheckTimer += Time.deltaTime;
            _turnDelayTimer += Time.deltaTime;
            if (!_autoDrive && Mathf.Abs(_rb.linearVelocityX) > 0.1f)
                _facingLeft = _rb.linearVelocity.x < 0;
            spriteRenderer.flipX = !_facingLeft;
            if (_springAnimator && _jumpPressedThisFrame)
            {
                _groundedCheckTimer = 0f;
                _springAnimator.SetTrigger(Spring);
                _springAnimator = null;
                _grounded = false;
                _fireSpring = true;
                _autoDrive = false;
                _deathArmed = true;
            }

            if (_grounded && _jumpPressedThisFrame)
            {
                _grounded = false;
                _groundedCheckTimer = 0f;
                _jump = true;
                _jumpPressedThisFrame = false;
            }

            if (!_grounded && _airJumpCharges > 0 && _jumpPressedThisFrame)
            {
                _airJump = true;
            }
            
            windSound.volume = Mathf.Lerp(0, 1, Mathf.Abs(_rb.linearVelocityY / maxSpeedWindSound));
            _jumpPressedThisFrame = false;
        }

        private void FixedUpdate()
        {
            if (_jump)
            {
                Services.Instance.SFX.PlayOneShot(jumpSound);
                _jump = false;
                _grounded = false;
                _rb.AddForce(Vector2.up * jumpForce, ForceMode2D.Impulse);
            }

            if (_airJump)
            {
                Services.Instance.SFX.PlayOneShot(airJumpSound);
                StartCoroutine(ImpactPause(impactPauseTime));
                _airJump = false;
                _airJumpCharges--;
                _rb.linearVelocity = Vector3.zero;
                _rb.AddForce(_airJumpDir * airJumpForce, ForceMode2D.Impulse);
            }
            
            if (_fireSpring)
            {
                _firstSpring = true;
                Services.Instance.SFX.PlayOneShot(springSound);
                Services.Instance.BGM.FadeIn(BGM.TrackType.Core);
                _fireSpring = false;
                _rb.linearVelocity = Vector2.zero;
                _rb.AddForce(Vector2.up * springPower, ForceMode2D.Impulse);
            }
            if (_autoDrive)
            {
                _rb.linearVelocityX = _facingLeft ? -runSpeed :  runSpeed;
            }
            else
            {
                if (_rb.linearVelocityX < 0)
                {
                    _facingLeft = true;
                }

                if (_rb.linearVelocityX > 0)
                {
                    _facingLeft = false;
                }
            }
            
            animator.SetBool(Grounded, _grounded);
            animator.SetFloat(Speed, Mathf.Abs(_rb.linearVelocity.x));
            animator.SetFloat(Vspeed, _rb.linearVelocity.y);

            if (_firstSpring)
            {
                if (_autoDrive)
                {
                    Services.Instance.BGM.FadeIn(BGM.TrackType.March);
                }
                else
                {
                    Services.Instance.BGM.FadeIn(BGM.TrackType.Core);
                }
            }
        }

        private IEnumerator ImpactPause(float pauseTime)
        {
            Time.timeScale = 0f;
            yield return new WaitForSecondsRealtime(pauseTime);
            Time.timeScale = 1f;
        }
        
        private void OnTriggerEnter2D(Collider2D other)
        {
            if (_deathArmed && other.gameObject.layer == LayerMask.NameToLayer("DeathBox"))
            {
                HandleDeath();
                return;
            }

            if (other.gameObject.layer == LayerMask.NameToLayer("Spring"))
            {
                EnterSpring?.Invoke();
                _springAnimator = other.gameObject.GetComponent<Animator>();
            }

            if (other.gameObject.layer == LayerMask.NameToLayer("Pickup"))
            {
                GetPickup?.Invoke();
                Services.Instance.SFX.PlayOneShot(pickupSound);
                _airJumpCharges++;
                Destroy(other.gameObject);
            }
        }

        private void HandleDeath()
        {
            OnDeath?.Invoke();
        }

        private void OnTriggerExit2D(Collider2D other)
        {
            if (other.gameObject.layer == LayerMask.NameToLayer("Spring"))
            {
                _springAnimator = null;
            }
        }

        private void OnCollisionEnter2D(Collision2D other)
        {
            CheckCollisions(other);
        }
        
        private void OnCollisionStay2D(Collision2D other)
        {
            CheckCollisions(other);
        }

        private void CheckCollisions(Collision2D other)
        {
            var contacts = new List<ContactPoint2D>();
            other.GetContacts(contacts);
            if (_turnDelayTimer >= turnDelay && 
                other.gameObject.layer != LayerMask.NameToLayer("Spring") && 
                other.gameObject.layer != LayerMask.NameToLayer("Pickup"))
            {
                foreach (var c in contacts)
                {
                    var x = c.normal.x;
                    if (Mathf.Abs(x) > 0.8f)
                    {
                        _turnDelayTimer = 0f;
                        if (!_autoDrive)
                        {
                            _rb.AddForce(new Vector2(x, 0f) * bouncePower, ForceMode2D.Impulse);
                        } 
                        else
                        {
                            _rb.linearVelocityX = -_rb.linearVelocityX;
                            _facingLeft = !_facingLeft;
                        }

                        Services.Instance.SFX.PlayOneShot(bumpSound);
                        break;
                    }
                }
            }

            _grounded = false;
            if (_groundedCheckTimer > turnDelay)
            {
                foreach (var c in contacts)
                {
                    var y = c.normal.y;
                    _grounded = Mathf.Approximately(1f, y);
                    if (_grounded)
                    {
                        _autoDrive = true;
                        return;
                    }
                }
            }
        }
    }
}