using System.Numerics;
using ImGuiNET;

namespace PartyDamage;

public class PluginUi : IDisposable {
    private Plugin Plugin { get; }
    internal bool Visible;

    public PluginUi(Plugin plugin) {
        this.Plugin = plugin;

        this.Plugin.Interface.UiBuilder.Draw += this.Draw;
    }

    public void Dispose() {
        this.Plugin.Interface.UiBuilder.Draw -= this.Draw;
    }

    private void Draw() {
        if (!this.Visible) {
            return;
        }

        ImGui.SetNextWindowSize(new Vector2(700, 300), ImGuiCond.FirstUseEver);
        using var end = new OnDispose(ImGui.End);
        if (!ImGui.Begin("Party Damage", ref this.Visible)) {
            return;
        }

        var anyChanged = false;

        // ImGui.TextUnformatted("Meter mode");
        // if (ImGui.BeginCombo("##mode", Enum.GetName(this.Plugin.Config.Mode))) {
        //     using var endCombo = new OnDispose(ImGui.EndCombo);

        //     foreach (var mode in Enum.GetValues<MeterMode>()) {
        //         if (ImGui.Selectable(Enum.GetName(mode), mode == this.Plugin.Config.Mode)) {
        //             anyChanged = true;
        //             this.Plugin.Config.Mode = mode;
        //         }
        //     }
        // }

        anyChanged |= ImGui.Checkbox("Use DPS bars behind party list", ref this.Plugin.Config.UseDpsBar);
        var barAlpha = this.Plugin.Config.BarAlpha * 100;
        if (ImGui.SliderFloat("Bar opacity", ref barAlpha, 0, 100, "%.2f%%")) {
            anyChanged = true;
            this.Plugin.Config.BarAlpha = Math.Clamp(barAlpha / 100, 0, 1);
        }

        if (ImGui.TreeNodeEx("Advanced colour options")) {
            using var treePop = new OnDispose(ImGui.TreePop);

            anyChanged |= ImGui.SliderInt("Add red", ref this.Plugin.Config.BarAddRed, 0, 255);
            anyChanged |= ImGui.SliderInt("Add green", ref this.Plugin.Config.BarAddGreen, 0, 255);
            anyChanged |= ImGui.SliderInt("Add blue", ref this.Plugin.Config.BarAddBlue, 0, 255);
            anyChanged |= ImGui.SliderInt("Multiply red", ref this.Plugin.Config.BarMulRed, 0, 100);
            anyChanged |= ImGui.SliderInt("Multiply green", ref this.Plugin.Config.BarMulGreen, 0, 100);
            anyChanged |= ImGui.SliderInt("Multiply blue", ref this.Plugin.Config.BarMulBlue, 0, 100);
        }

        anyChanged |= ImGui.Checkbox("Alternate between values", ref this.Plugin.Config.Alternate);
        using (ImGuiHelper.DisabledUnless(this.Plugin.Config.Alternate)) {
            anyChanged |= ImGui.SliderFloat("Seconds before alternating", ref this.Plugin.Config.AlternateSeconds, 0.1f, 60f);
        }

        using (ImGuiHelper.DisabledUnless(this.Plugin.Config is { Alternate: true, Mode: MeterMode.Mana })) {
            anyChanged |= ImGui.Checkbox("Only alternate on jobs that use mana", ref this.Plugin.Config.ManaModeAlternateOnlyManaUsers);
        }

        var textColour = ConvertRgba(this.Plugin.Config.TextColour);
        if (ImGui.ColorEdit3("DPS text colour", ref textColour)) {
            anyChanged = true;
            this.Plugin.Config.TextColour = ConvertRgba(textColour);
        }

        if (ImGui.TreeNodeEx("Advanced colour options")) {
            using var treePop = new OnDispose(ImGui.TreePop);

            anyChanged |= ImGui.SliderInt("Add red", ref this.Plugin.Config.TextAddRed, 0, 255);
            anyChanged |= ImGui.SliderInt("Add green", ref this.Plugin.Config.TextAddGreen, 0, 255);
            anyChanged |= ImGui.SliderInt("Add blue", ref this.Plugin.Config.TextAddBlue, 0, 255);
            anyChanged |= ImGui.SliderInt("Multiply red", ref this.Plugin.Config.TextMulRed, 0, 100);
            anyChanged |= ImGui.SliderInt("Multiply green", ref this.Plugin.Config.TextMulGreen, 0, 100);
            anyChanged |= ImGui.SliderInt("Multiply blue", ref this.Plugin.Config.TextMulBlue, 0, 100);
        }

        if (anyChanged) {
            this.Plugin.SaveConfig();
        }
    }

    private static Vector3 ConvertRgba(uint colour) {
        var red = colour >> 24;
        var green = (colour >> 16) & 0xFF;
        var blue = (colour >> 8) & 0xFF;
        // var alpha = colour & 0xFF;

        return new Vector3(red / 255f, green / 255f, blue / 255f);
    }

    private static uint ConvertRgba(Vector3 parts) {
        var red = (uint) Math.Round(parts.X * 255);
        var green = (uint) Math.Round(parts.Y * 255);
        var blue = (uint) Math.Round(parts.Z * 255);

        return (red << 24)
               | (green << 16)
               | (blue << 8)
               | 0xFF;
    }
}