using System.Linq;
using System.Text.RegularExpressions;
using Content.Server.Administration.Managers;
using Content.Server.Preferences.Managers;
using Content.Shared.Administration;
using Content.Shared.Mind;
using Content.Shared.Roles;
using Robust.Shared.Player;

namespace Content.Server.Corvax.Administration;

public sealed partial class BwoinkMetadataSystem : EntitySystem
{
    [Dependency] private IAdminManager _adminManager = default!;
    [Dependency] private IServerPreferencesManager _preferencesManager = default!;
    [Dependency] private SharedMindSystem _mind = default!;
    [Dependency] private SharedRoleSystem _role = default!;

    private static readonly Regex AdminColorRegex = new(@"\[color=(red|purple)\]", RegexOptions.Compiled);

    public override void Initialize()
    {
        base.Initialize();

        SubscribeLocalEvent<TransformBwoinkTextEvent>(OnTransformBwoinkText);
    }

    private void OnTransformBwoinkText(ref TransformBwoinkTextEvent ev)
    {
        var adminData = _adminManager.GetAdminData(ev.SenderSession);

        if (adminData is not null)
        {
            if (_adminManager.HasAdminFlag(ev.SenderSession, AdminFlags.NameColor))
            {
                var prefs = _preferencesManager.GetPreferencesOrNull(ev.SenderSession.UserId);
                if (prefs != null)
                {
                    var hex = prefs.AdminOOCColor.ToHex();
                    ev.Text = AdminColorRegex.Replace(ev.Text, $"[color={hex}]");
                }
            }
        }
        else
        {
            var prefix = GetAntagPrefix(ev.SenderSession);
            if (prefix != null)
                ev.Text = InsertPrefix(ev.Text, ev.SenderSession.Name, prefix);
        }
    }

    private string? GetAntagPrefix(ICommonSession session)
    {
        var mindId = _mind.GetMind(session.UserId);
        if (mindId is not { } mind)
            return null;

        var roles = _role.MindGetAllRoleInfo(mind);
        var antagRoles = roles.Where(r => r.Antagonist).ToList();

        if (antagRoles.Count == 0)
            return null;

        var color = AntagPrototype.GroupColor.ToHex();
        var names = string.Join(", ", antagRoles.Select(r => Loc.GetString(r.Name)));
        return $"[color={color}]\\[{names}\\][/color]";
    }

    private static string InsertPrefix(string text, string playerName, string prefix)
    {
        var index = text.IndexOf(playerName, StringComparison.Ordinal);
        if (index < 0)
            return text;

        // Вставляем префикс перед первым вхождением имени игрока: [текст до имени] + [префикс] + " " + [имя] + [текст после имени]
        return text[..index] + prefix + " " + playerName + text[(index + playerName.Length)..];
    }
}

[ByRefEvent]
public struct TransformBwoinkTextEvent
{
    public string Text;
    public ICommonSession SenderSession;

    public TransformBwoinkTextEvent(string text, ICommonSession senderSession)
    {
        Text = text;
        SenderSession = senderSession;
    }
}