using System;
using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Rendering.PostProcessing;

public class PlayerController : OrbitalPositionBehaviour
{
    public static int s_PlayerScore;
    private static int s_HighScore = 20;
    
    private static PlayerController s_Instance;
    public static bool IsPlayerAttached => s_Instance.m_OrbitalPosition.m_IsAttachedToRings;
    public static void AttachPlayer() { s_Instance.m_OrbitalPosition.m_IsAttachedToRings = true; }

    private Vector3 m_SuicidePoint;
    private bool m_KillingItself;
    private float m_DeathLerp;

    private bool m_HasFreeHitActive;
    private bool m_HasInvicibility;
    
    [Header("References")]
    [SerializeField] private MeshRenderer m_Renderer;
    [SerializeField] private Text m_ScoreText;
    [SerializeField] private Material m_DefaultMaterial;
    [SerializeField] private Material m_FreeHitMaterial;
    [SerializeField] private PostProcessVolume m_PostProcessVolume;
    
    protected override void OnStart()
    {
        s_Instance = this;
        s_HighScore = Mathf.Max(s_HighScore, PlayerPrefs.GetInt("HighScore", 0));
        Debug.Log($"Loaded high score of [{s_HighScore}]");
        
        GlobalOrbitalPositionManager.SetPlayer(m_OrbitalPosition);
        
        m_OrbitalPosition.m_ObjectRadius = 0.1f;
        m_OrbitalPosition.m_SpinSpeed = 0.2f;
    }

    public void Update()
    {
        m_ScoreText.text = s_PlayerScore.ToString();
        if (s_PlayerScore > s_HighScore)
            m_ScoreText.color = Color.yellow;
        else
            m_ScoreText.color = Color.white;

        if (m_HasFreeHitActive)
            m_Renderer.material = m_FreeHitMaterial;
        else
            m_Renderer.material = m_DefaultMaterial;
        
        if (GlobalInput.IsScreenClicked && GlobalOrbitalPositionManager.AllowPlayerInput)
        {
            m_OrbitalPosition.m_AttachedRing += 1;
        }

        if (!m_KillingItself)
            return;
        
        transform.position = Vector3.Lerp(m_SuicidePoint, m_SuicidePoint.normalized * 20f, m_DeathLerp);
        m_DeathLerp += Time.deltaTime;
    }

    private IEnumerator OnGrowPlayerModifier()
    {
        transform.localScale *= 1.5f;
        m_OrbitalPosition.m_ObjectRadius *= 1.5f;
        
        yield return new WaitForSecondsRealtime(15f);
        
        transform.localScale /= 1.5f;
        m_OrbitalPosition.m_ObjectRadius /= 1.5f;
    }

    private IEnumerator OnShrinkPlayerModifier()
    {
        transform.localScale *= 0.6f;
        m_OrbitalPosition.m_ObjectRadius *= 0.6f;
        
        yield return new WaitForSecondsRealtime(15f);
        
        transform.localScale /= 0.6f;
        m_OrbitalPosition.m_ObjectRadius /= 0.6f;
    }

    private IEnumerator TriggerInvicibility()
    {
        m_HasFreeHitActive = false;
        m_HasInvicibility = true;

        yield return new WaitForSecondsRealtime(1f);

        m_HasInvicibility = false;
    }

    public override void OnCollision(OrbitalPositionBehaviour other)
    {
        if (!m_OrbitalPosition.m_IsAttachedToRings)
            return;

        if (other.CompareTag("Enemy"))
        {
            if (m_HasInvicibility)
            {
                return;
            }

            if (m_HasFreeHitActive)
            {
                StartCoroutine(TriggerInvicibility());
                return;
            }

            GlobalOrbitalPositionManager.RestartSimulation();
            m_SuicidePoint = transform.position;
            m_KillingItself = true;
            m_DeathLerp = 0f;
        }
        
        else if (other.CompareTag("PlayerMod"))
        {
            switch (((PlayerModifier)other).HeldModifier)
            {
                case PlayerModifier.Modifier.GainPoints:
                    s_PlayerScore += 100;
                    break;
                
                case PlayerModifier.Modifier.FreeHit:
                    m_HasFreeHitActive = true;
                    break;
                
                case PlayerModifier.Modifier.GrowPlayer:
                    StartCoroutine(OnGrowPlayerModifier());
                    break;
                
                case PlayerModifier.Modifier.ShrinkPlayer:
                    StartCoroutine(OnShrinkPlayerModifier());
                    break;
                
                case PlayerModifier.Modifier.SpeedUp:
                    StartCoroutine(GlobalOrbitalPositionManager.Instance.StartPlayerSpeedupModifier());
                    break;
                
                case PlayerModifier.Modifier.ClearAllEnemies:
                    EnemyController.KillAllEnemies();
                    break;
                
                default:
                    Debug.Log($"Collision with unknown modifier occured [{((PlayerModifier)other).HeldModifier}]");
                    break;
            }
        }

        else
        {
            Debug.Log("Unknown collision occured");
        }
    }

    public override void OnSimulationRestart()
    {
        m_KillingItself = false;
        m_Renderer.enabled = true;

        m_HasFreeHitActive = false;
        
        m_Renderer.material.color = Color.green;
        
        s_HighScore = Math.Max(s_HighScore, s_PlayerScore);
        PlayerPrefs.SetInt("HighScore", s_HighScore);
        s_PlayerScore = 0;
    }

    public override void OnReachCentre()
    {
        GlobalOrbitalPositionManager.RestartSimulation();
    }
}