using System;
using System.Numerics;
using Glamourer.Customization;
using ImGuiNET;
using OtterGui;
using OtterGui.Raii;
using Penumbra.GameData.Enums;

namespace Glamourer.Gui.Customization;

public partial class CustomizationDrawer
{
    private const string IconSelectorPopup = "Style Picker";

    private void DrawIconSelector(CustomizeIndex index)
    {
        using var _        = SetId(index);
        using var bigGroup = ImRaii.Group();
        var       label    = _currentOption;

        var current = _set.DataByValue(index, _currentByte, out var custom, _customize.Face);
        if (current < 0)
        {
            label   = $"{_currentOption} (Custom #{_customize[index]})";
            current = 0;
            custom  = _set.Data(index, 0);
        }

        var icon = _service.AwaitedService.GetIcon(custom!.Value.IconId);
        if (ImGui.ImageButton(icon.ImGuiHandle, _iconSize))
            ImGui.OpenPopup(IconSelectorPopup);
        ImGuiUtil.HoverIconTooltip(icon, _iconSize);

        ImGui.SameLine();
        using (var group = ImRaii.Group())
        {
            if (_currentIndex == CustomizeIndex.Face)
                FaceInputInt(current);
            else
                DataInputInt(current);

            ImGui.TextUnformatted($"{label} ({custom.Value.Value})");
        }

        DrawIconPickerPopup();
    }

    private bool UpdateFace(CustomizeData data)
    {
        // Hrothgar Hack
        var value = _set.Race == Race.Hrothgar ? data.Value + 4 : data.Value;
        if (_customize.Face == value)
            return false;

        _customize.Face =  value;
        Changed         |= CustomizeFlag.Face;
        return true;
    }

    private void FaceInputInt(int currentIndex)
    {
        ++currentIndex;
        ImGui.SetNextItemWidth(_inputIntSize);
        if (ImGui.InputInt("##text", ref currentIndex, 1, 1))
        {
            currentIndex = Math.Clamp(currentIndex - 1, 0, _currentCount - 1);
            var data = _set.Data(_currentIndex, currentIndex, _customize.Face);
            UpdateFace(data);
        }

        ImGuiUtil.HoverTooltip($"Input Range: [1, {_currentCount}]");
    }

    private void DrawIconPickerPopup()
    {
        using var popup = ImRaii.Popup(IconSelectorPopup, ImGuiWindowFlags.AlwaysAutoResize);
        if (!popup)
            return;

        using var style = ImRaii.PushStyle(ImGuiStyleVar.ItemSpacing, Vector2.Zero)
            .Push(ImGuiStyleVar.FrameRounding, 0);
        for (var i = 0; i < _currentCount; ++i)
        {
            var custom = _set.Data(_currentIndex, i, _customize.Face);
            var icon   = _service.AwaitedService.GetIcon(custom.IconId);
            using (var _ = ImRaii.Group())
            {
                if (ImGui.ImageButton(icon.ImGuiHandle, _iconSize))
                {
                    if (_currentIndex == CustomizeIndex.Face)
                        UpdateFace(custom);
                    else
                        UpdateValue(custom.Value);
                    ImGui.CloseCurrentPopup();
                }

                ImGuiUtil.HoverIconTooltip(icon, _iconSize);

                var text      = custom.Value.ToString();
                var textWidth = ImGui.CalcTextSize(text).X;
                ImGui.SetCursorPosX(ImGui.GetCursorPosX() + (_iconSize.X - textWidth + 2 * ImGui.GetStyle().FramePadding.X) / 2);
                ImGui.TextUnformatted(text);
            }

            if (i % 8 != 7)
                ImGui.SameLine();
        }
    }


    // Only used for facial features, so fixed ID.
    private void DrawMultiIconSelector()
    {
        using var bigGroup = ImRaii.Group();
        DrawMultiIcons();
        ImGui.SameLine();
        using var group = ImRaii.Group();
        ImGui.Dummy(new Vector2(0, ImGui.GetTextLineHeightWithSpacing() + ImGui.GetStyle().ItemSpacing.Y / 2));

        _currentCount = 256;
        PercentageInputInt();

        ImGui.TextUnformatted(_set.Option(CustomizeIndex.LegacyTattoo));
    }

    private void DrawMultiIcons()
    {
        var       options = _set.Order[CharaMakeParams.MenuType.IconCheckmark];
        using var _       = ImRaii.Group();
        foreach (var (featureIdx, idx) in options.WithIndex())
        {
            using var id      = SetId(featureIdx);
            var       enabled = _customize.Get(featureIdx) != CustomizeValue.Zero;
            var       feature = _set.Data(featureIdx, 0, _customize.Face);
            var icon = featureIdx == CustomizeIndex.LegacyTattoo
                ? _legacyTattoo ?? _service.AwaitedService.GetIcon(feature.IconId)
                : _service.AwaitedService.GetIcon(feature.IconId);
            if (ImGui.ImageButton(icon.ImGuiHandle, _iconSize, Vector2.Zero, Vector2.One, (int)ImGui.GetStyle().FramePadding.X,
                    Vector4.Zero, enabled ? Vector4.One : _redTint))
            {
                _customize.Set(featureIdx, enabled ? CustomizeValue.Zero : CustomizeValue.Max);
                Changed |= _currentFlag;
            }

            ImGuiUtil.HoverIconTooltip(icon, _iconSize);
            if (idx % 4 != 3)
                ImGui.SameLine();
        }
    }
}