using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Ashwild.UI
{
    /// <summary>
    /// One resource line of a build's cost, shown near the crosshair while placing: an icon plus an
    /// "owned / required" count (e.g. 2/3). A pure, data-agnostic view — it is handed an icon, the two
    /// numbers and an "affordable" flag and renders exactly that (tinting the count to signal a
    /// shortfall), never resolving any domain data itself. Authored as pre-placed children of the
    /// crosshair's cost holder — CrosshairManager fills and shows/hides them, it does not instantiate.
    /// </summary>
    [DisallowMultipleComponent]
    public class BuildCostEntryUI : MonoBehaviour
    {
        #region Serialized Fields

        [Header("References")]
        [Tooltip("Icon of the required resource.")]
        [SerializeField] private Image icon;

        [Tooltip("Owned / required count for one placement (e.g. 2/3).")]
        [SerializeField] private TMP_Text amountLabel;

        [Header("Affordability Colours")]
        [Tooltip("Amount colour when the player holds enough of this resource.")]
        [SerializeField] private Color affordColor = Color.white;

        [Tooltip("Amount colour when the player is short of this resource.")]
        [SerializeField] private Color missingColor = new Color(1f, 0.35f, 0.35f);

        #endregion

        #region Public API

        /// <summary>
        /// Fills the line: sets the icon, the "owned / required" count, and tints it by affordability.
        /// </summary>
        public void Set(Sprite resourceIcon, int owned, int amount, bool affordable)
        {
            if (icon != null)
            {
                icon.sprite = resourceIcon;
                icon.enabled = resourceIcon != null;
            }
            if (amountLabel != null)
            {
                amountLabel.text = $"{owned}/{amount}";
                amountLabel.color = affordable ? affordColor : missingColor;
            }
        }

        #endregion
    }
}