namespace ProjectM.Client
{
    /// <summary>
    /// Client-local build-mode state shared between the HUD build palette (sets the selected buildable), the
    /// build placement input (ground ghost preview + click-to-place + conveyor rotation), and the input gather
    /// (suppresses Fire while a build is selected, so a left-click places instead of firing). Pure UI state —
    /// never replicated, never touches the sim. Reset on play-enter (statics survive fast-enter domain reloads).
    /// </summary>
    public static class BuildPaletteState
    {
        /// <summary>Selected structure type (StructureType.*); 0 = none / no slot selected.</summary>
        public static byte Selected;

        /// <summary>Pending conveyor facing (0=+X,1=-X,2=+Z,3=-Z); rotated by [ / ] or R.</summary>
        public static byte Direction;

        /// <summary>True while the build PALETTE panel is open (toggled by Tab / gamepad Y). Slice 1 HUD declutter:
        /// the palette is hidden by default; this gates its visibility, orthogonal to <see cref="Active"/>.</summary>
        public static bool PaletteOpen;

        /// <summary>True while a buildable SLOT is selected (placement is armed). The palette must also be open.</summary>
        public static bool Active => Selected != 0;

        /// <summary>Toggle the palette panel open/closed; closing also cancels any active slot selection.</summary>
        public static void TogglePalette()
        {
            PaletteOpen = !PaletteOpen;
            if (!PaletteOpen) { Selected = 0; Direction = 0; }
        }

        /// <summary>Select a type (or 0 to deselect), resetting the pending conveyor facing; auto-opens the palette
        /// so a slot click never leaves the panel hidden.</summary>
        public static void Select(byte type) { Selected = type; Direction = 0; if (type != 0) PaletteOpen = true; }

        /// <summary>Cancel the current selection and close the palette.</summary>
        public static void Clear() { Selected = 0; Direction = 0; PaletteOpen = false; }

        [UnityEngine.RuntimeInitializeOnLoadMethod(UnityEngine.RuntimeInitializeLoadType.SubsystemRegistration)]
        static void ResetStatics() { Selected = 0; Direction = 0; PaletteOpen = false; }
    }
}