using FirebaseAdmin.Messaging;
using Marco.Pms.DataAccess.Data;
using Marco.Pms.Model.Dtos.Attendance;
using Marco.Pms.Model.Entitlements;
using Marco.Pms.Services.Service.ServiceInterfaces;
using MarcoBMS.Services.Service;
using Microsoft.EntityFrameworkCore;

namespace Marco.Pms.Services.Service
{
    public class FirebaseService : IFirebaseService
    {
        private readonly IDbContextFactory<ApplicationDbContext> _dbContextFactory;
        private readonly IServiceScopeFactory _serviceScopeFactory;
        public FirebaseService(IDbContextFactory<ApplicationDbContext> dbContextFactory,
            IServiceScopeFactory serviceScopeFactory)
        {
            _dbContextFactory = dbContextFactory ?? throw new ArgumentNullException(nameof(dbContextFactory));
            _serviceScopeFactory = serviceScopeFactory ?? throw new ArgumentNullException(nameof(serviceScopeFactory));
        }

        public async Task SendLoginMessageAsync(string name)
        {
            await using var _context = await _dbContextFactory.CreateDbContextAsync();

            // List of device registration tokens to send the message to
            var registrationTokens = await _context.FCMTokenMappings.Select(ft => ft.FcmToken).ToListAsync();

            var notificationFirebase = new Notification
            {
                Title = "Login Alert",
                Body = $"{name} has successfully logged in to the application"
            };

            await SendMessageToMultipleDevicesAsync(registrationTokens, notificationFirebase);
        }
        public async Task SendAttendanceMessageAsync(Guid projectId, string Name, ATTENDANCE_MARK_TYPE markType, Guid tenantId)
        {
            await using var _context = await _dbContextFactory.CreateDbContextAsync();
            var projectTask = Task.Run(async () =>
            {
                await using var dbContext = await _dbContextFactory.CreateDbContextAsync();
                return await dbContext.ProjectAllocations
                .Include(pa => pa.Project)
                .Where(pa => pa.ProjectId == projectId && pa.IsActive && pa.Project != null)
                .GroupBy(pa => pa.ProjectId)
                .Select(g => new
                {
                    ProjectName = g.Select(pa => pa.Project!.Name).FirstOrDefault(),
                    EmployeeIds = g.Select(pa => pa.EmployeeId).Distinct().ToList()
                }).FirstOrDefaultAsync();
            });

            var teamAttendanceRoleTask = Task.Run(async () =>
            {
                await using var dbContext = await _dbContextFactory.CreateDbContextAsync();
                return await dbContext.RolePermissionMappings
                .Where(rp => rp.FeaturePermissionId == PermissionsMaster.TeamAttendance)
                .Select(rp => rp.ApplicationRoleId).ToListAsync();
            });
            var manageProjectsRoleTask = Task.Run(async () =>
            {
                await using var dbContext = await _dbContextFactory.CreateDbContextAsync();
                return await dbContext.RolePermissionMappings
                .Where(rp => rp.FeaturePermissionId == PermissionsMaster.ManageProject)
                .Select(rp => rp.ApplicationRoleId).ToListAsync();
            });

            await Task.WhenAll(projectTask, teamAttendanceRoleTask, manageProjectsRoleTask);

            var teamAttendanceRoleIds = teamAttendanceRoleTask.Result;
            var manageProjectsRoleIds = manageProjectsRoleTask.Result;
            var project = projectTask.Result;

            List<Guid> projectAssignedEmployeeIds = project?.EmployeeIds ?? new List<Guid>();

            var employeeIds = await _context.EmployeeRoleMappings
                .Where(er => (projectAssignedEmployeeIds.Contains(er.EmployeeId) || manageProjectsRoleIds.Contains(er.RoleId)) && teamAttendanceRoleIds.Contains(er.RoleId))
                .Select(er => er.EmployeeId)
                .ToListAsync();

            Notification notificationFirebase;
            switch (markType)
            {
                case ATTENDANCE_MARK_TYPE.CHECK_IN:
                    notificationFirebase = new Notification
                    {
                        Title = "Attendance Update",
                        Body = $" {Name} has checked in for project {project?.ProjectName ?? ""}."
                    };
                    break;
                case ATTENDANCE_MARK_TYPE.CHECK_OUT:
                    notificationFirebase = new Notification
                    {
                        Title = "Attendance Update",
                        Body = $" {Name} has checked out for project {project?.ProjectName ?? ""}."
                    };
                    break;
                case ATTENDANCE_MARK_TYPE.REQUEST_REGULARIZE:
                    notificationFirebase = new Notification
                    {
                        Title = "Regularization Request",
                        Body = $" {Name} has submitted a regularization request for project {project?.ProjectName ?? ""}."
                    };
                    break;
                case ATTENDANCE_MARK_TYPE.REGULARIZE:
                    notificationFirebase = new Notification
                    {
                        Title = " Regularization Approved",
                        Body = $" {Name}'s regularization request for project {project?.ProjectName ?? ""} has been accepted."
                    };
                    break;
                case ATTENDANCE_MARK_TYPE.REGULARIZE_REJECT:
                    notificationFirebase = new Notification
                    {
                        Title = "Regularization Denied",
                        Body = $" {Name}'s regularization request for project {project?.ProjectName ?? ""} has been rejected."
                    };
                    break;
                default:
                    notificationFirebase = new Notification
                    {
                        Title = "Attendance Update",
                        Body = $" {Name} has update his/her attendance for project {project?.ProjectName ?? ""}."
                    };
                    break;
            }

            // List of device registration tokens to send the message to
            var registrationTokens = await _context.FCMTokenMappings
                .Where(ft => employeeIds.Contains(ft.EmployeeId) && ft.TenantId == tenantId)
                .Select(ft => ft.FcmToken).ToListAsync();

            var data = new Dictionary<string, string>()
                    {
                        { "Keyword", "Attendance" },
                        { "ProjectId", projectId.ToString() },
                        { "Action", markType.ToString() }
                    };

            await SendMessageToMultipleDevicesWithDataAsync(registrationTokens, notificationFirebase, data);
        }
        public async Task SendMessageToMultipleDevicesWithDataAsync(List<string> registrationTokens, Notification notificationFirebase, Dictionary<string, string> data)
        {
            using var scope = _serviceScopeFactory.CreateScope();
            var _logger = scope.ServiceProvider.GetRequiredService<ILoggingService>();
            try
            {
                var message = new MulticastMessage()
                {
                    Tokens = registrationTokens,
                    Data = data,
                    Notification = notificationFirebase
                };
                // Send the multicast message
                var response = await FirebaseMessaging.DefaultInstance.SendEachForMulticastAsync(message);

                _logger.LogInfo("{SuccessCount} messages were sent successfully.", response.SuccessCount);

                if (response.FailureCount > 0)
                {
                    var failedTokens = new List<string>();
                    for (int i = 0; i < response.Responses.Count; i++)
                    {
                        if (!response.Responses[i].IsSuccess)
                        {
                            failedTokens.Add(registrationTokens[i]);
                        }
                    }
                    _logger.LogInfo("List of tokens that caused failures: " + string.Join(", ", failedTokens));
                }
            }
            catch (FirebaseMessagingException ex)
            {
                // Log the specific Firebase error.
                _logger.LogError(ex, "Error sending push notification");

                // Check for specific error codes that indicate an invalid or unregistered token.
                if (ex.MessagingErrorCode == MessagingErrorCode.Unregistered ||
                    ex.MessagingErrorCode == MessagingErrorCode.InvalidArgument)
                {
                    _logger.LogWarning("FCM token is invalid and should be deleted from the database");

                    // TODO: Implement the logic here to remove the invalid token from your database.
                    // Example: await YourTokenService.DeleteTokenAsync(loginDto.DeviceToken);
                }
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Exception Occured while sending notification to firebase");
            }

        }
        public async Task SendMessageToMultipleDevicesAsync(List<string> registrationTokens, Notification notificationFirebase)
        {
            using var scope = _serviceScopeFactory.CreateScope();
            var _logger = scope.ServiceProvider.GetRequiredService<ILoggingService>();
            try
            {
                var message = new MulticastMessage()
                {
                    Tokens = registrationTokens,
                    Notification = notificationFirebase
                };
                // Send the multicast message
                var response = await FirebaseMessaging.DefaultInstance.SendEachForMulticastAsync(message);
                _logger.LogInfo("{SuccessCount} messages were sent successfully.", response.SuccessCount);

                if (response.FailureCount > 0)
                {
                    var failedTokens = new List<string>();
                    for (int i = 0; i < response.Responses.Count; i++)
                    {
                        if (!response.Responses[i].IsSuccess)
                        {
                            failedTokens.Add(registrationTokens[i]);
                        }
                    }
                    _logger.LogInfo("List of tokens that caused failures: " + string.Join(", ", failedTokens));
                }
            }
            catch (FirebaseMessagingException ex)
            {
                // Log the specific Firebase error.
                _logger.LogError(ex, "Error sending push notification");

                // Check for specific error codes that indicate an invalid or unregistered token.
                if (ex.MessagingErrorCode == MessagingErrorCode.Unregistered ||
                    ex.MessagingErrorCode == MessagingErrorCode.InvalidArgument)
                {
                    _logger.LogWarning("FCM token is invalid and should be deleted from the database");

                    // TODO: Implement the logic here to remove the invalid token from your database.
                    // Example: await YourTokenService.DeleteTokenAsync(loginDto.DeviceToken);
                }
            }

        }
    }
}