using System.Collections.Generic;
using ArcaneLibs.Extensions;
using Avalonia.Controls;
using Avalonia.Media;
using LibMatrix;
using LibMatrix.EventTypes.Spec;
using LibMatrix.EventTypes.Spec.State.RoomInfo;

namespace ModerationClient.Services;

public class EventRenderer {
    private static Dictionary<StateEventResponse, Control> _eventRenderers = new();
    public static Control RenderEvent(StateEventResponse evt) {
        // if (_eventRenderers.TryGetValue(evt, out var @event)) {
            // @event.
            // return @event;
        // }
        
        if (evt.Type == "m.room.member") {
            return _eventRenderers[evt] = RenderMemberEvent(evt);
        }
        if (evt.Type == "m.room.message") {
            return _eventRenderers[evt] = RenderMessageEvent(evt);
        }
        if (evt.Type == "m.room.server_acl") {
            return _eventRenderers[evt] = RenderACLStateEvent(evt);
        }
        
        return new TextBlock {
            Text = $"Unknown event type: {evt.Type}",
            Foreground = Brushes.Red,
            Classes = {"message"}, TextWrapping = TextWrapping.WrapWithOverflow
        };
    }
    
    private static Control RenderMemberEvent(StateEventResponse evt) {
        var content = evt.ContentAs<RoomMemberEventContent>()!;
        return new TextBlock {
            Text = $"{evt.Sender} changed {evt.StateKey}'s membership: {content.Membership} as {content.DisplayName} (reason: {content.Reason})",
            Classes = {"message"}, Foreground = Brushes.Teal
        };
    }
    
    private static Control RenderACLStateEvent(StateEventResponse evt) {
        var content = evt.ContentAs<RoomCreateEventContent>()!;
        return new TextBlock {
            Text = $"{evt.Sender} changed the room's ACL.",
            Classes = {"message"}, Foreground = Brushes.Teal
        };
    }

    private static Control RenderMessageEvent(StateEventResponse evt) {
        var content = evt.ContentAs<RoomMessageEventContent>()!;
        if (content.Format == null) {
            return new TextBlock {
                Text = $"{evt.Sender}: {content.Body}",
                Classes = {"message"},  TextWrapping = TextWrapping.WrapWithOverflow
            };
        }
        else if (content.Format == "org.matrix.custom.html") {
            // parse html
            var html = content.FormattedBody;
            return new TextBlock {
                Text = $"{evt.Sender}: {html}",
                Classes = {"message"},  TextWrapping = TextWrapping.WrapWithOverflow
            };
        }
        else {
            return new TextBlock {
                Text = $"{evt.Sender} sent a message with an unknown format: {content.Format}",
                Foreground = Brushes.Red,
                Classes = {"message"}
            };
        }
        
        return new TextBlock {
            Text = $"{evt.Sender} sent an unknown message type: {content.MessageType}: {content.ToJson(ignoreNull: true)}",
            Foreground = Brushes.Red,
            Classes = {"message"}
        };
    }
}