using System;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

public sealed class ShopItemView : MonoBehaviour
{
    [SerializeField] private Image iconImage;
    [SerializeField] private TMP_Text nameText;
    [SerializeField] private TMP_Text descriptionText;
    [SerializeField] private TMP_Text priceText;
    [SerializeField] private TMP_Text rarityText;
    [SerializeField] private Button buyButton;
    [SerializeField] private TMP_Text buyButtonText;
    [SerializeField] private Image background;

    [Header("Rarity Colors")]
    [SerializeField] private Color commonColor = Color.white;
    [SerializeField] private Color uncommonColor = new(0.4f, 0.8f, 0.4f);
    [SerializeField] private Color rareColor = new(0.4f, 0.6f, 1f);
    [SerializeField] private Color epicColor = new(0.8f, 0.4f, 1f);

    private ModifierData data;

    public event Action<ModifierData> OnBuyClicked;

    private void Awake()
    {
        if (buyButton != null)
            buyButton.onClick.AddListener(() => OnBuyClicked?.Invoke(data));
    }

    public void Setup(ModifierData modifierData, ShopItemState state)
    {
        data = modifierData;

        if (nameText != null) nameText.text = data.DisplayName;
        if (descriptionText != null) descriptionText.text = data.Description;
        if (priceText != null) priceText.text = data.ShopPrice.ToString();
        if (iconImage != null && data.Icon != null) iconImage.sprite = data.Icon;

        if (rarityText != null)
        {
            rarityText.text = data.Rarity.ToString();
            rarityText.color = GetRarityColor(data.Rarity);
        }

        SetState(state);
    }

    public void SetState(ShopItemState state)
    {
        if (buyButton == null) return;

        switch (state)
        {
            case ShopItemState.Available:
                buyButton.interactable = true;
                if (buyButtonText != null) buyButtonText.text = "Buy";
                break;
            case ShopItemState.RepurchaseAvailable:
                buyButton.interactable = true;
                if (buyButtonText != null) buyButtonText.text = "Buy";
                break;
            case ShopItemState.TooExpensive:
                buyButton.interactable = false;
                if (buyButtonText != null) buyButtonText.text = "Buy";
                break;
            case ShopItemState.Owned:
                buyButton.interactable = false;
                if (buyButtonText != null) buyButtonText.text = "Owned";
                break;
        }
    }

    private Color GetRarityColor(ModifierRarity rarity)
    {
        return rarity switch
        {
            ModifierRarity.Common => commonColor,
            ModifierRarity.Uncommon => uncommonColor,
            ModifierRarity.Rare => rareColor,
            ModifierRarity.Epic => epicColor,
            _ => commonColor
        };
    }
}