namespace Aeshnidae.Codex;

public static class Commands
{
    [CommandHandler("codex", AccessLevel.Player, CommandHandlerFlag.RequiresWorld, -1,
        "Open your Aelrynth Codex - the book of everything the server knows about your character.",
        "/codex                open it\n" +
        "/codex <section>      open it at that section, e.g. /codex bank\n" +
        "/codex sections       what is in it right now")]
    public static void HandleCodex(Session session, params string[] parameters)
    {
        var player = session.Player;

        if (player is null)
            return;

        if (parameters.Length > 0 && parameters[0].Equals("sections", StringComparison.OrdinalIgnoreCase))
        {
            var sb = new StringBuilder($"{Mod.Name} sections, in order:\n");

            foreach (var (mod, status) in Providers.Status())
                sb.AppendLine($"  {mod}: {status}");

            Reply(session, sb.ToString().TrimEnd());
            return;
        }

        var section = parameters.Length > 0 ? string.Join(" ", parameters) : null;

        try
        {
            Codex.Open(player, section);
        }
        catch (Exception ex)
        {
            ModManager.Log($"[{Mod.Name}] /codex failed for {player.Name}: {ex}", ModManager.LogLevel.Error);
            Reply(session, "The Codex would not open. Try the book in your pack.");
        }
    }

    [CommandHandler("codex-reload", AccessLevel.Admin, CommandHandlerFlag.None, 0,
        "Restart the Aeshnidae.Codex mod, re-reading Settings.json.",
        "/codex-reload")]
    public static void HandleReload(Session session, params string[] parameters)
    {
        var container = Mod.Container;

        if (container is null)
        {
            Reply(session, $"{Mod.Name} is not loaded.");
            return;
        }

        container.Restart();
        Reply(session, $"{Mod.Name} restarted.");
    }

    /// <summary>
    /// The client renders an embedded newline as a music note, so a multi-line
    /// message has to go out as one SendMessage per line.
    /// </summary>
    private static void Reply(Session? session, string message)
    {
        if (session?.Player is null)
        {
            ModManager.Log(message);
            return;
        }

        foreach (var line in (message ?? "").Split('\n'))
        {
            var text = line.TrimEnd('\r');

            if (!string.IsNullOrWhiteSpace(text))
                session.Player.SendMessage(text);
        }
    }
}