using FutureMailAPI.DTOs;
using FutureMailAPI.Models;

namespace FutureMailAPI.Services
{
    public class NotificationService : INotificationService
    {
        private readonly ILogger<NotificationService> _logger;

        public NotificationService(ILogger<NotificationService> logger)
        {
            _logger = logger;
        }

        public Task<ApiResponse<NotificationDeviceResponseDto>> RegisterDeviceAsync(int userId, NotificationDeviceRequestDto request)
        {
            _logger.LogInformation($"Registering device for user {userId}");
            var response = new NotificationDeviceResponseDto
            {
                DeviceId = "device_" + Guid.NewGuid().ToString("N"),
                DeviceType = request.DeviceType,
                IsActive = true,
                RegisteredAt = DateTime.UtcNow
            };
            return Task.FromResult(ApiResponse<NotificationDeviceResponseDto>.SuccessResult(response));
        }

        public Task<ApiResponse<bool>> UnregisterDeviceAsync(int userId, string deviceId)
        {
            _logger.LogInformation($"Unregistering device {deviceId} for user {userId}");
            return Task.FromResult(ApiResponse<bool>.SuccessResult(true));
        }

        public Task<ApiResponse<NotificationSettingsDto>> GetNotificationSettingsAsync(int userId)
        {
            _logger.LogInformation($"Getting notification settings for user {userId}");
            var settings = new NotificationSettingsDto
            {
                EmailDelivery = true,
                PushNotification = true,
                InAppNotification = true,
                DeliveryReminder = true,
                ReceivedNotification = true,
                SystemUpdates = false,
                QuietHoursStart = "22:00",
                QuietHoursEnd = "08:00",
                EnableQuietHours = false
            };
            return Task.FromResult(ApiResponse<NotificationSettingsDto>.SuccessResult(settings));
        }

        public Task<ApiResponse<bool>> UpdateNotificationSettingsAsync(int userId, NotificationSettingsDto settings)
        {
            _logger.LogInformation($"Updating notification settings for user {userId}");
            return Task.FromResult(ApiResponse<bool>.SuccessResult(true));
        }

        public Task<ApiResponse<NotificationListResponseDto>> GetNotificationsAsync(int userId, NotificationListQueryDto query)
        {
            _logger.LogInformation($"Getting notifications for user {userId}");
            var notifications = new List<NotificationMessageDto>
            {
                new NotificationMessageDto
                {
                    Id = "notif_1",
                    UserId = userId,
                    Title = "Test Notification",
                    Body = "This is a test notification",
                    Type = "Info",
                    RelatedEntityId = "mail_1",
                    IsRead = false,
                    CreatedAt = DateTime.UtcNow.AddDays(-1)
                }
            };
            var response = new NotificationListResponseDto
            {
                Notifications = notifications,
                Total = notifications.Count,
                UnreadCount = 1,
                Page = query.Page,
                Size = query.Size
            };
            return Task.FromResult(ApiResponse<NotificationListResponseDto>.SuccessResult(response));
        }

        public Task<ApiResponse<bool>> MarkNotificationAsReadAsync(int userId, string notificationId)
        {
            _logger.LogInformation($"Marking notification {notificationId} as read for user {userId}");
            return Task.FromResult(ApiResponse<bool>.SuccessResult(true));
        }

        public Task<ApiResponse<bool>> MarkAllNotificationsAsReadAsync(int userId)
        {
            _logger.LogInformation($"Marking all notifications as read for user {userId}");
            return Task.FromResult(ApiResponse<bool>.SuccessResult(true));
        }

        public Task<ApiResponse<bool>> SendNotificationAsync(int userId, NotificationMessageDto notification)
        {
            _logger.LogInformation($"Sending notification to user {userId}");
            return Task.FromResult(ApiResponse<bool>.SuccessResult(true));
        }
    }
}