using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;

public class GroundItemManager : MonoBehaviour
{
    public static GroundItemManager Instance { get; private set; }
    private Material outlineMaterial;
    private readonly Material[] materialTemp = new Material[2];
    private TMP_Text interactText;
    public static bool InteractingWithItem = false;

    private void Awake()
    {
        Instance = this;
        outlineMaterial = OnDemandLoader.Load<Material>("Materials/Shaders/Weapon_Outline/OutlineMaterial");
        interactText = UIManager.Instance.itemInteractMessage;
    }

    public void UpdateGroundItems(int count, int[] ids, int[] x, int[] z)
    {
        //clear the whole array
        foreach (GameObject go in groundItems)
        {
            if (go != null)
                Destroy(go);
        }

        if (count >= 64)
        {
            count = 64;
        }

        for (int i = 0; i < count; i++)
        {
            GameObject g = OnDemandLoader.Load<GameObject>("items/" + ids[i]);
            if (g == null) continue;

            GameObject groundItem = Instantiate(g);
            Weapon itemData = OnDemandLoader.Load<Weapon>("config/" + ids[i]);
            ItemType itemType = itemData.ItemType;

            AssignOutlineMaterial(groundItem);
            
            //Crypto coins
            if (IsCryptoCoin(itemType))
            {
                CreateCryptoCoin(groundItem, i, x, z);
            }

            CreateItemGlow(itemType, groundItem, i, x, z);

            groundItem.name = g.name;
            groundItems[i] = groundItem;
        }
    }

    private static bool IsCryptoCoin(ItemType type) => type == ItemType.COIN;

    private void CreateItemGlow(ItemType type, GameObject groundItem, int currIndex, IReadOnlyList<int> x,
        IReadOnlyList<int> z)
    {
        GameObject droppedItemGlow = OnDemandLoader.Load<GameObject>("gfx/DroppedItemGlow");
        groundItem.transform.localScale = Vector3.one * 1.1f;
        Vector3 spawnPosition = new Vector3(x[currIndex], 0, z[currIndex]);
        groundItem.transform.position =
            new Vector3(x[currIndex], World.Instance.getHeight(spawnPosition) + 1f, z[currIndex]);
        GameObject glow = Instantiate(droppedItemGlow, groundItem.transform);
        ParticleSystem glowSystem = glow.GetComponent<ParticleSystem>();
        ParticleSystem.MainModule main = glowSystem.main;

        Color glowColor = type switch
        {
            ItemType.GUN => WeaponColor,
            ItemType.EXPLOSIVE => ExplosiveColor,
            ItemType.MELEE => MeleeColor,
            ItemType.CONSUMABLE => ConsumableColor,
            ItemType.COIN => CoinColor,
            ItemType.MISC => MiscColor,
            _ => MiscColor
        };
        
        foreach (MeshRenderer rend in groundItem.GetComponentsInChildren<MeshRenderer>())
        {
            rend.materials[1].SetColor(OutlineColor, glowColor);
        }
        
        main.startColor = glowColor;
    }

    private void CreateCryptoCoin(GameObject groundItem, int currIndex, IReadOnlyList<int> x, IReadOnlyList<int> z)
    {
        groundItem.transform.localScale = Vector3.one * 0.245f;

        Animator anim = groundItem.AddComponent<Animator>();

        anim.transform.eulerAngles = new Vector3(90, 0, 0);

        RuntimeAnimatorController controller =
            OnDemandLoader.Load<RuntimeAnimatorController>("Crypto_Coins/CryptoSpin_Controller");
        anim.runtimeAnimatorController = controller;
        anim.applyRootMotion = true;

        Vector3 pos = new Vector3(x[currIndex], 10.35f, z[currIndex]);
        anim.transform.position = pos;

        //Add Particle
        GameObject coinFountain = OnDemandLoader.Load<GameObject>("gfx/Coin_Fountain");
        Vector3 floorHeight =
            new Vector3(x[currIndex], World.Instance.getHeight(new Vector3(x[currIndex], 0, z[currIndex])) + 1f,
                z[currIndex]);
        Instantiate(coinFountain, floorHeight, Quaternion.identity, groundItem.transform);
    }


    private void AssignOutlineMaterial(GameObject groundItem)
    {
        foreach (MeshRenderer rend in groundItem.GetComponentsInChildren<MeshRenderer>())
        {
            materialTemp[0] = rend.material;
            materialTemp[1] = outlineMaterial;

            rend.materials = materialTemp;
        }
    }
    public void Update()
    {
        if (interactText.gameObject != null)
            interactText.text = "";

        InteractingWithItem = false;

        foreach (GameObject g in groundItems)
        {
            if (g == null) continue;

            if (!(Vector3.Distance(Player.Instance.transform.position, g.transform.position) < 2.0f)) continue;

            if (interactText.gameObject != null)
            {
                if (interactText != null)
                {
                    InteractingWithItem = true;
                    ItemDef itemDef = ItemDef.GetInstance();
                    string objectName = itemDef.getItemName(int.Parse(g.name));
                    string objectLevel = itemDef.getItemLevel(int.Parse(g.name));
                    interactText.text =
                        InputMessageHandler.Instance.Interpolate(
                            $"Press [[Interact]] to pick up: {objectLevel} [<color=#FF7600><b>{objectName}</b></color>]");
                }
            }

            Player.Instance.interactableGroundItem = g;
            return;
        }
    }

    private readonly GameObject[] groundItems = new GameObject[64];


    private static readonly Color WeaponColor = Color.yellow;
    private static readonly Color ExplosiveColor = Color.red;
    private static readonly Color MeleeColor = Color.magenta;
    private static readonly Color ConsumableColor = Color.green;
    private static readonly Color CoinColor = Color.blue;
    private static readonly Color MiscColor = Color.white;
    private static readonly int OutlineColor = Shader.PropertyToID("_OutlineColor");
}