using System.Collections.Generic;

namespace Neo.Afx.WinService.Messages
{
    /// <summary>
    /// A class for sending batches of SMS's.
    /// </summary>
    public class SmsSender : MessageSender
    {
        ISmsSender _sender;

        public SmsSender()
            : base(MessageTypeEnum.Sms)
        {
        }

        #region InitializeSender

        protected override void InitializeSender(MessageDatabase database)
        {
            var smsSettings = database.GetSmsSetting();
            switch((SmsDeliveryMethodEnum)smsSettings.SmsDeliveryMethodID)
            {
                case SmsDeliveryMethodEnum.Vodazone:
                    _sender = new SmsVodazone(
                        smsSettings.UserRef,
                        smsSettings.UserName,
                        smsSettings.Password);
                    break;

                case SmsDeliveryMethodEnum.Swift:
                    _sender = new SmsSwift(
                        smsSettings.UserRef,
                        smsSettings.UserName);
                    break;

                case SmsDeliveryMethodEnum.Vodacom:
                    _sender = new SmsVodacom(
                        smsSettings.UserRef,
                        smsSettings.UserName,
                        smsSettings.Password);
                    break;
            }
        }

        #endregion

        #region FinalizeSender

        protected override void FinalizeSender(MessageDatabase database)
        {
            _sender = null;
        }

        #endregion

        protected override bool ShouldRun(int count, out string error)
        {
            var creditCount = _sender.Credits;
            var result = count <= creditCount;
            error = result ? null : string.Format("Insufficient credits to send sms's. Credits left: {0}", creditCount);
            return result;
        }

        protected override bool SendMessage(Message message, List<DocumentContent> attachments, char recipientSeparator, out string error)
        {
            return _sender.Send(message.MessageText, message.Recipients, out error);
        }
    }
}