using GmRelay.Shared.Domain;

namespace GmRelay.Bot.Features.Confirmation.HandleRsvp;

internal sealed record RsvpFlowDecision(
    string CallbackText,
    bool ShouldAlertGm,
    bool ShouldRevertSessionToConfirmationSent,
    bool ShouldMarkSessionConfirmed,
    bool ShouldNotifyGroup,
    bool ShouldNotifyGm);

internal static class RsvpFlowRules
{
    public static RsvpFlowDecision Evaluate(
        string requestedStatus,
        string currentSessionStatus,
        int totalParticipants,
        int confirmedParticipants)
    {
        if (requestedStatus == RsvpStatus.Declined)
        {
            return new RsvpFlowDecision(
                CallbackText: "\u0412\u044b \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u043e\u0442 \u0443\u0447\u0430\u0441\u0442\u0438\u044f.",
                ShouldAlertGm: true,
                ShouldRevertSessionToConfirmationSent: currentSessionStatus == SessionStatus.Confirmed,
                ShouldMarkSessionConfirmed: false,
                ShouldNotifyGroup: false,
                ShouldNotifyGm: false);
        }

        var everyoneConfirmed = confirmedParticipants == totalParticipants;

        return new RsvpFlowDecision(
            CallbackText: "\u0412\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0434\u0438\u043b\u0438 \u0443\u0447\u0430\u0441\u0442\u0438\u0435!",
            ShouldAlertGm: false,
            ShouldRevertSessionToConfirmationSent: false,
            ShouldMarkSessionConfirmed: everyoneConfirmed,
            ShouldNotifyGroup: everyoneConfirmed,
            ShouldNotifyGm: everyoneConfirmed);
    }
}