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

public class SkinShopManager : MonoBehaviour
{
    public static SkinShopManager instance;
    public Building skinShopBuilding;
    public SkinsData skinsData;
    public GameObject popup;

    public GameObject listItemPrefab;
    public Transform listItemsParent;
    public Button btn_Equip;
    public Button btn_Buy;
    public static SkinShopItemData selectedSkin;
    List<SkinShopItem> skinShopItems=new List<SkinShopItem>();
    
    void Awake() {
        instance = this;
    }
    void Start()
    {
        Populate();

        btn_Equip.onClick.AddListener(onEquip);
        btn_Buy.onClick.AddListener(onBuy);
    }

    public void Show(){
        Populate();
        popup.SetActive(true);
    }

    public void Populate(){
        //Validate skins list
        if(DBmanager.SkinsPurchased.Count <=0){
            foreach(SkinShopItemData skin in skinsData.skins){
                if(skin.price==0){ //Defaults
                    DBmanager.PurchaseSkin(skin);
                    if(GetEquipedSkin().Length <=0){
                        EquipSkin(skin.name);
                    }
                }
            }
        }

        //PURGE
        for(int i=0;i < listItemsParent.childCount;i++){
            Destroy(listItemsParent.GetChild(i).gameObject);
        }
        skinShopItems = new List<SkinShopItem>();
        for(int i=0; i<skinsData.skins.Length;i++){
            int rarity = 0;
            if(skinsData.skins[i].skinType == SkinType.Rare){rarity=1;}
            if(skinsData.skins[i].skinType == SkinType.Legendary){rarity=2;}

            if(skinShopBuilding.curLevel < rarity){
                continue;
            }
            SkinShopItem newItem = Instantiate(listItemPrefab, listItemsParent).GetComponent<SkinShopItem>();
            newItem.Set(skinsData.skins[i]);
            skinShopItems.Add(newItem);
            // newItem.backgroundImg.color = (skinsData.skins[i].skinType==SkinType.Base) ? basicColor : (skinsData.skins[i].skinType==SkinType.Rare ? rareColor : legendaryColor);
        }

        SelectItem(selectedSkin);
    }

    public void SelectItem(SkinShopItemData data){
        selectedSkin = data;
        if(data==null){
            btn_Equip.gameObject.SetActive(false); btn_Buy.gameObject.SetActive(false);
            return;
        }
        if(DBmanager.SkinsPurchased.Contains(data.name)){ // <-- purchased
            btn_Equip.gameObject.SetActive(true);
            btn_Buy.gameObject.SetActive(false);
            btn_Equip.interactable = GetEquipedSkin() != data.name; // <-- disable equip button if already equipped
        }else{
            btn_Buy.gameObject.SetActive(true);
            btn_Equip.gameObject.SetActive(false);

            btn_Buy.interactable = DBmanager.Metal >= data.price;
            btn_Buy.GetComponentInChildren<TMP_Text>().text = data.price.ToString();
        }

        foreach(SkinShopItem item in skinShopItems){
            item.OnSelectionChanged(data.name);
        }

    }

    void onEquip(){
        EquipSkin(selectedSkin.name);
        Populate();
    }

    void onBuy(){
        DBmanager.PurchaseSkin(selectedSkin);

        SkinShopManager.instance.Populate();
    }

    public static void EquipSkin(string skin){
        PlayerPrefs.SetString("shipSkin", skin);
        PlayerPrefs.Save();
    }

    public static string GetEquipedSkin(){
        if(PlayerPrefs.HasKey("shipSkin")){
            return PlayerPrefs.GetString("shipSkin");
        }

        return "Default";
    }
}

[Serializable]
public class SkinShopItemData{
    public string name;
    public Sprite image;
    public int price;
    public SkinType skinType;
}


public enum SkinType{
    Base,
    Rare,
    Legendary
}