using AppKit;
using CoreGraphics;
using VoiceCat.Core;
using Voicecat.V1;

namespace VoiceCat.Mac;

internal sealed class PrivateMessageWindowController : NSWindowController
{
    private readonly VoiceCatClient client;
    private readonly uint otherUserId;
    private readonly uint selfId;
    private readonly NSTextView transcript = new(new CGRect(0, 0, 430, 300)) { Editable = false, Selectable = true };
    private readonly NSTextField compose = new(new CGRect(20, 20, 350, 28)) { PlaceholderString = "Private message" };

    internal PrivateMessageWindowController(VoiceCatClient client, uint otherUserId, uint selfId, string nickname) : base(new NSWindow(
        new CGRect(0, 0, 480, 400), NSWindowStyle.Titled | NSWindowStyle.Closable | NSWindowStyle.Resizable,
        NSBackingStore.Buffered, false))
    {
        this.client = client; this.otherUserId = otherUserId; this.selfId = selfId;
        Window!.Title = $"Private message — {nickname}"; Window.Center();
        NSView view = Window.ContentView!;
        var scroll = new NSScrollView(new CGRect(20, 65, 440, 315)) { DocumentView = transcript, HasVerticalScroller = true };
        scroll.AccessibilityLabel = $"Private conversation with {nickname}"; view.AddSubview(scroll);
        ((INSAccessibility)compose).AccessibilityLabel = $"Message to {nickname}"; compose.Activated += Send; view.AddSubview(compose);
        var button = new NSButton(new CGRect(380, 18, 80, 32)) { Title = "Send" }; button.Activated += Send; view.AddSubview(button);
    }

    private void Send(object? sender, EventArgs args)
    {
        string value = compose.StringValue.Trim(); if (value.Length == 0) return;
        client.Send(new() { TextMessage = new() { Scope = TextScope.TextPrivate, TargetId = otherUserId, Body = value, ClientMsgId = Guid.NewGuid().ToString("N") } });
        compose.StringValue = "";
    }

    internal void Append(TextMessage message, string sender)
    {
        string line = $"[{DateTime.Now:t}] {(message.SenderId == selfId ? "You" : sender)}: {message.Body}";
        transcript.Value = transcript.Value.Length == 0 ? line : transcript.Value + "\n" + line;
        transcript.ScrollRangeToVisible(new Foundation.NSRange(transcript.Value.Length, 0));
        Window?.MakeKeyAndOrderFront(this);
    }
}