// NOTE: duplicated in GmRelay.Web/Services/TelegramSessionBatchRenderer.cs
using GmRelay.Shared.Domain;
using GmRelay.Shared.Rendering;
using Telegram.Bot.Types.ReplyMarkups;

namespace GmRelay.Bot.Infrastructure.Telegram;

public static class TelegramSessionBatchRenderer
{
    public static (string Text, InlineKeyboardMarkup Markup) Render(SessionBatchViewModel view)
    {
        var messageText = $"🎲 <b>Новые игры:</b> {System.Net.WebUtility.HtmlEncode(view.Title)}\n\n" +
                          $"<b>Расписание:</b>\n\n";

        var buttons = new List<InlineKeyboardButton[]>();

        foreach (var session in view.Sessions)
        {
            messageText += $"📅 <b>{session.ScheduledAt.FormatMoscow()}</b>\n";

            var tags = new List<string>();
            if (!string.IsNullOrWhiteSpace(session.System))
                tags.Add($"<b>Система:</b> {System.Net.WebUtility.HtmlEncode(session.System)}");
            if (!string.IsNullOrWhiteSpace(session.Format))
                tags.Add($"<b>Формат:</b> {System.Net.WebUtility.HtmlEncode(session.Format)}");
            tags.Add($"<b>Тип:</b> {(session.IsOneShot ? "One-shot" : "Кампания")}");

            if (tags.Count > 0)
            {
                messageText += "🏷 " + string.Join(" · ", tags) + "\n";
            }

            if (session.DurationMinutes.HasValue)
            {
                messageText += $"⏱ <b>Длительность:</b> {FormatDuration(session.DurationMinutes.Value)}\n";
            }

            if (!string.IsNullOrWhiteSpace(session.Description))
            {
                messageText += $"📝 <b>Описание:</b>\n{System.Net.WebUtility.HtmlEncode(session.Description)}\n\n";
            }

            var format = session.Format ?? string.Empty;
            var isOnline = string.Equals(format, "Online", StringComparison.OrdinalIgnoreCase);
            var isOffline = string.Equals(format, "Offline", StringComparison.OrdinalIgnoreCase);
            var isHybrid = string.Equals(format, "Hybrid", StringComparison.OrdinalIgnoreCase);

            if ((isOnline || isHybrid) && !string.IsNullOrWhiteSpace(session.JoinLink))
            {
                var encodedLink = System.Net.WebUtility.HtmlEncode(session.JoinLink);
                messageText += $"🔗 <b>Ссылка:</b> <a href=\"{encodedLink}\">{encodedLink}</a>\n";
            }

            if ((isOffline || isHybrid) && !string.IsNullOrWhiteSpace(session.LocationAddress))
            {
                messageText += $"📍 <b>Адрес:</b> {System.Net.WebUtility.HtmlEncode(session.LocationAddress)}\n";
            }

            messageText += session.MaxPlayers.HasValue
                ? $"👥 <b>Места:</b> {session.ActivePlayerCount}/{session.MaxPlayers.Value}\n"
                : $"👥 <b>Игроки ({session.ActivePlayerCount}):</b>\n";

            if (session.ActivePlayers.Count > 0)
            {
                messageText += string.Join("\n", session.ActivePlayers.Select(p =>
                    $"  👤 {(p.TelegramUsername != null ? "@" + p.TelegramUsername : p.DisplayName)}")) + "\n";
            }
            else
            {
                messageText += "  <i>Пока никто не записался</i>\n";
            }

            if (session.WaitlistedPlayers.Count > 0)
            {
                messageText += $"⏳ <b>Лист ожидания ({session.WaitlistedPlayers.Count}):</b>\n";
                messageText += string.Join("\n", session.WaitlistedPlayers.Select(p =>
                    $"  ⏱ {(p.TelegramUsername != null ? "@" + p.TelegramUsername : p.DisplayName)}")) + "\n";
            }

            if (GmRelay.Shared.Domain.SessionStatus.IsCancelled(session.Status))
            {
                messageText += "❌ <i>Сессия отменена</i>\n\n";
            }
            else
            {
                messageText += "\n";
                var actionRow = session.AvailableActions
                    .Select(a => InlineKeyboardButton.WithCallbackData(a.Label, $"{a.ActionKey}:{a.SessionId}"))
                    .ToArray();
                if (actionRow.Length > 0)
                    buttons.Add(actionRow);
            }
        }

        return (messageText, new InlineKeyboardMarkup(buttons));
    }

    private static string FormatDuration(int minutes)
    {
        if (minutes <= 0) return "0 мин";
        var hours = minutes / 60;
        var mins = minutes % 60;
        if (hours > 0 && mins > 0) return $"{hours} ч {mins} мин";
        if (hours > 0) return $"{hours} ч";
        return $"{mins} мин";
    }
}