using UnityEngine;

namespace Paroxe.PdfRenderer.Internal
{
    public class PRHelper : MonoBehaviour
    {
        static PRHelper()
        {
            s_Styles = new Styles();
        }

        public static bool GroupHeader(string text, bool isExpanded)
        {
            Rect rect = GUILayoutUtility.GetRect(20f, 18f, s_Styles.header);

            s_Styles.Backup();
            s_Styles.Apply();

            if (Event.current.type == EventType.Repaint)
                s_Styles.header.Draw(rect, text, isExpanded, isExpanded, isExpanded, isExpanded);

            Event e = Event.current;
            if (e.type == EventType.MouseDown)
            {
                if (rect.Contains(e.mousePosition))
                {
                    isExpanded = !isExpanded;
                    e.Use();
                }
            }

            s_Styles.Revert();
            return isExpanded;
        }

        private static Styles s_Styles;
        private class Styles
        {
            public GUIStyle header = "ShurikenModuleTitle";

            internal Styles()
            {
                header.font = (new GUIStyle("Label")).font;
            }

            RectOffset m_Border;
            float m_FixedHeight;
            Vector2 m_ContentOffset;
            TextAnchor m_TextAlign;
            FontStyle m_TextStyle;
            int m_FontSize;
            RectOffset m_Margin;

            public void Backup()
            {
                m_Border = s_Styles.header.border;
                m_FixedHeight = s_Styles.header.fixedHeight;
                m_ContentOffset = s_Styles.header.contentOffset;
                m_TextAlign = s_Styles.header.alignment;
                m_TextStyle = s_Styles.header.fontStyle;
                m_FontSize = s_Styles.header.fontSize;
                m_Margin = s_Styles.header.margin;
            }

            public void Apply()
            {
                s_Styles.header.border = new RectOffset(7, 7, 4, 4);
                s_Styles.header.fixedHeight = 18;
                s_Styles.header.contentOffset = new Vector2(3f, -2f);
                s_Styles.header.alignment = TextAnchor.MiddleLeft;
                s_Styles.header.fontStyle = FontStyle.Normal;
                s_Styles.header.fontSize = 11;
                s_Styles.header.margin = new RectOffset(0, 0, 0, 0);
            }

            public void Revert()
            {
                s_Styles.header.border = m_Border;
                s_Styles.header.fixedHeight = m_FixedHeight;
                s_Styles.header.contentOffset = m_ContentOffset;
                s_Styles.header.alignment = m_TextAlign;
                s_Styles.header.fontStyle = m_TextStyle;
                s_Styles.header.fontSize = m_FontSize;
                s_Styles.header.margin = m_Margin;
            }
        }
    }
}