using Jovian.PopupSystem.UI;
using UnityEngine;

namespace Jovian.PopupSystem {
    /// <summary>
    /// Fluent API struct for building popup content. Operates directly on cached elements
    /// inside a <see cref="PopupReference"/> — no intermediate allocations. Received in
    /// the build callback passed to <see cref="IPopupSystem.Show"/>.
    /// </summary>
    public struct PopupContentBuilder {
        readonly PopupReference view;

        /// <summary>
        /// Creates a builder targeting the given popup reference.
        /// </summary>
        public PopupContentBuilder(PopupReference view) {
            this.view = view;
        }

        /// <summary>
        /// Adds a header text element (bold, larger font).
        /// </summary>
        public PopupContentBuilder AddHeader(string text) {
            var header = view.GetHeader();
            header.text = text;
            return this;
        }

        /// <summary>
        /// Adds a body text element.
        /// </summary>
        public PopupContentBuilder AddText(string text) {
            var label = view.GetText();
            label.text = text;
            return this;
        }

        /// <summary>
        /// Adds a colored body text element. Hex color can be with or without the # prefix.
        /// </summary>
        public PopupContentBuilder AddText(string text, string hexColor) {
            var label = view.GetText();
            var prefix = hexColor.Length > 0 && hexColor[0] == '#' ? "" : "#";
            label.text = $"<color={prefix}{hexColor}>{text}</color>";
            return this;
        }

        /// <summary>
        /// Adds a stat row with a label and integer value.
        /// </summary>
        public PopupContentBuilder AddStat(string label, int value) {
            var (labelText, valueText) = view.GetStat();
            labelText.text = label;
            valueText.text = value.ToString();
            return this;
        }

        /// <summary>
        /// Adds a stat row with a label and string value.
        /// </summary>
        public PopupContentBuilder AddStat(string label, string value) {
            var (labelText, valueText) = view.GetStat();
            labelText.text = label;
            valueText.text = value;
            return this;
        }

        /// <summary>
        /// Adds an image element with the given sprite and optional height.
        /// </summary>
        public PopupContentBuilder AddImage(Sprite sprite, float height = 64f) {
            var image = view.GetImage();
            image.sprite = sprite;
            var rt = (RectTransform)image.transform;
            rt.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, height);
            return this;
        }

        /// <summary>
        /// Adds a horizontal separator line.
        /// </summary>
        public PopupContentBuilder AddSeparator() {
            view.GetSeparator();
            return this;
        }
    }
}