namespace AcDream.App.UI;

/// <summary>
/// The base scrollbar skin from LayoutDesc <c>0x2100003E</c>, seated the way
/// retail seats it at runtime. <c>UIElement_Scrollbar::UpdateScrollingArea
/// @0x00470AA0</c> ignores the buttons' authored positions: it moves the
/// INCREMENT button (attribute <c>0x77</c>) to the top/left corner
/// (<c>MoveTo(0,0)</c>) and the DECREMENT button (attribute <c>0x78</c>) to
/// the bottom/right corner. The vertical skin (element <c>0x10000455</c>)
/// designates <c>0x77=0x10000072</c> (the UP-arrow art, authored at Y=32)
/// and <c>0x78=0x10000071</c> (the DOWN-arrow art, authored at Y=0) — so
/// seating by authored Y renders both arrows upside down (the 2026-08-24
/// owner report). Each button and thumb slice authors three states:
/// Normal (red center gem / dark navy thumb), Normal_rollover (amber gem /
/// bright blue thumb), Normal_pressed (gold highlight gem / dark thumb) —
/// all live-DAT probed 2026-08-24.
/// </summary>
internal static class RetailScrollbarChrome
{
    // ── Vertical skin (element 0x10000455, 16 px) ────────────────────────
    internal const uint Track = 0x06004C5Fu;

    /// <summary>Top button = the INCREMENT designee 0x10000072 (up arrow).</summary>
    internal const uint UpNormal = 0x06004C6Cu;
    internal const uint UpRollover = 0x06004C6Du;
    internal const uint UpPressed = 0x06004C6Eu;

    /// <summary>Bottom button = the DECREMENT designee 0x10000071 (down arrow).</summary>
    internal const uint DownNormal = 0x06004C69u;
    internal const uint DownRollover = 0x06004C6Au;
    internal const uint DownPressed = 0x06004C6Bu;

    internal const uint ThumbTopNormal = 0x06004C60u;
    internal const uint ThumbTopRollover = 0x06004C61u;
    internal const uint ThumbTopPressed = 0x06004C62u;
    internal const uint ThumbMidNormal = 0x06004C63u;
    internal const uint ThumbMidRollover = 0x06004C64u;
    internal const uint ThumbMidPressed = 0x06004C65u;
    internal const uint ThumbBotNormal = 0x06004C66u;
    internal const uint ThumbBotRollover = 0x06004C67u;
    internal const uint ThumbBotPressed = 0x06004C68u;

    // ── Horizontal skin (element 0x1000036D, 16 px) ──────────────────────
    internal const uint HTrack = 0x06004C7Fu;

    /// <summary>Left button = the INCREMENT designee 0x1000036C.</summary>
    internal const uint LeftNormal = 0x06004C8Cu;
    internal const uint LeftRollover = 0x06004C8Du;
    internal const uint LeftPressed = 0x06004C8Eu;

    /// <summary>Right button = the DECREMENT designee 0x1000036B.</summary>
    internal const uint RightNormal = 0x06004C89u;
    internal const uint RightRollover = 0x06004C8Au;
    internal const uint RightPressed = 0x06004C8Bu;

    internal const uint HThumbTopNormal = 0x06004C80u;
    internal const uint HThumbTopRollover = 0x06004C81u;
    internal const uint HThumbTopPressed = 0x06004C82u;
    internal const uint HThumbMidNormal = 0x06004C83u;
    internal const uint HThumbMidRollover = 0x06004C84u;
    internal const uint HThumbMidPressed = 0x06004C85u;
    internal const uint HThumbBotNormal = 0x06004C86u;
    internal const uint HThumbBotRollover = 0x06004C87u;
    internal const uint HThumbBotPressed = 0x06004C88u;

    /// <summary>Wires the full retail vertical skin onto <paramref name="bar"/>.</summary>
    internal static void ApplyVertical(UiScrollbar bar)
    {
        bar.TrackSprite = Track;
        bar.UpSprite = UpNormal;
        bar.UpRolloverSprite = UpRollover;
        bar.UpPressedSprite = UpPressed;
        bar.DownSprite = DownNormal;
        bar.DownRolloverSprite = DownRollover;
        bar.DownPressedSprite = DownPressed;
        bar.ThumbTopSprite = ThumbTopNormal;
        bar.ThumbTopRolloverSprite = ThumbTopRollover;
        bar.ThumbTopPressedSprite = ThumbTopPressed;
        bar.ThumbSprite = ThumbMidNormal;
        bar.ThumbRolloverSprite = ThumbMidRollover;
        bar.ThumbPressedSprite = ThumbMidPressed;
        bar.ThumbBotSprite = ThumbBotNormal;
        bar.ThumbBotRolloverSprite = ThumbBotRollover;
        bar.ThumbBotPressedSprite = ThumbBotPressed;
    }

    /// <summary>Wires the full retail horizontal skin onto <paramref name="bar"/>.
    /// The leading (<see cref="UiScrollbar.UpSprite"/>) slot is the LEFT edge.</summary>
    internal static void ApplyHorizontal(UiScrollbar bar)
    {
        bar.TrackSprite = HTrack;
        bar.UpSprite = LeftNormal;
        bar.UpRolloverSprite = LeftRollover;
        bar.UpPressedSprite = LeftPressed;
        bar.DownSprite = RightNormal;
        bar.DownRolloverSprite = RightRollover;
        bar.DownPressedSprite = RightPressed;
        bar.ThumbTopSprite = HThumbTopNormal;
        bar.ThumbTopRolloverSprite = HThumbTopRollover;
        bar.ThumbTopPressedSprite = HThumbTopPressed;
        bar.ThumbSprite = HThumbMidNormal;
        bar.ThumbRolloverSprite = HThumbMidRollover;
        bar.ThumbPressedSprite = HThumbMidPressed;
        bar.ThumbBotSprite = HThumbBotNormal;
        bar.ThumbBotRolloverSprite = HThumbBotRollover;
        bar.ThumbBotPressedSprite = HThumbBotPressed;
    }
}