using System.Text.Json;
using Microsoft.EntityFrameworkCore;
using RadicadeServer.DB;
using RadicadeServer.Extensions;
using RadicadeServer.RecNet.Enums.Messages;
using RadicadeServer.RecNet.Notifications;

namespace RadicadeServer.API.Notifications
{
	public static class RewardPushDiag
	{
		public const string RegisteredName = "RewardSelectionReceived";

		public static string EnumNumber => Convert.ToInt64(NotificationType.GiftPackageRewardSelectionReceived,
				System.Globalization.CultureInfo.InvariantCulture)
			.ToString(System.Globalization.CultureInfo.InvariantCulture);

		public static async Task<string> ReplayPendingRewardSelectionAsync(RecDBContext db, long accountId, string? idForm)
		{
			var id = Resolve(idForm);

			var progression = await db.Progression.AsNoTracking().FirstOrDefaultAsync(x => x.PlayerId == accountId);
			var pending = progression?.GetProgressionJson()?.PendingGameRewards;
			var reward = pending?.Where(r => !r.Consumed).OrderByDescending(r => r.CreatedAt).FirstOrDefault();

			if (reward == null)
				return $"account {accountId} has no pending reward selection - finish a game or a daily challenge first.\n";

			var connections = Notify.SnapshotClients().Count(c => c.AccountId == accountId);
			var notification = new Notification { Id = id, Msg = reward };
			await Notify.SendNotify(accountId, notification);

			var idJson = JsonSerializer.Serialize(id);
			var lines = new System.Text.StringBuilder();
			lines.AppendLine($"account {accountId}: pushed reward selectionId={reward.RewardSelectionId} ({reward.RewardType}, \"{reward.Message}\") on {connections} connection(s).");
			lines.AppendLine($"Id token on the wire: {idJson}" + (id == RegisteredName ? " (the key the client registered a handler under)" : string.Empty));
			lines.AppendLine($"expected: {(id == EnumNumber ? "the client parses the frame, finds no handler for a bare number unless its own table has one, and handles nothing." : "the client's dispatcher finds a handler under this exact key and the selection screen opens - no relog.")}");
			lines.AppendLine($"envelope: {Notify.EnvelopeWithIdForm(notification, idJson)}");
			lines.AppendLine($"pending for this account now: {pending!.Count(r => !r.Consumed)} selection(s).");
			return lines.ToString();
		}

		private static string Resolve(string? idForm) => (idForm ?? "name").Trim().ToLowerInvariant() switch
		{
			"name" => RegisteredName,
			"number" => EnumNumber,
			"" => RegisteredName,
			_ => idForm!.Trim(),
		};
	}
}