using Fitness_core_BE.Interfaces;
using Fitness_core_BE.Models;
using Microsoft.EntityFrameworkCore;

namespace Fitness_core_BE.Repos
{
    public class DeviceCommandRepo : IDeviceCommandRepo
    {
        private readonly TenantDbContext _dbContext;

        public DeviceCommandRepo(TenantDbContext dbContext)
        {
            _dbContext = dbContext;
        }

        public async Task<DeviceCommand> AddAsync(DeviceCommand command)
        {
            await _dbContext.DeviceCommands.AddAsync(command);
            return command;
        }

        public async Task<List<DeviceCommand>> GetPendingByClientAsync(Guid clientId)
        {
            return await _dbContext.DeviceCommands
                .Where(c => c.FKClientId == clientId && c.Status == "Pending")
                .OrderBy(c => c.CreatedAt)
                .ToListAsync();
        }

        public async Task<DeviceCommand?> GetByIdAsync(Guid commandId)
        {
            return await _dbContext.DeviceCommands
                .FirstOrDefaultAsync(c => c.Id == commandId);
        }

        public Task<bool> IsQueuedAsync(
            Guid bindingId,
            string commandType,
            int desiredVersion,
            CancellationToken ct = default)
        {
            return _dbContext.DeviceCommands.AnyAsync(command =>
                command.FKAccessDeviceBindingId == bindingId &&
                command.CommandType == commandType &&
                command.DesiredVersion == desiredVersion &&
                (command.Status == "Pending" || command.Status == "InProgress"), ct);
        }

        public Task<List<DeviceCommand>> GetPendingStateCommandsAsync(
            Guid bindingId,
            CancellationToken ct = default)
        {
            return _dbContext.DeviceCommands
                .Where(command =>
                    command.FKAccessDeviceBindingId == bindingId &&
                    command.CommandType == "SetAccessState" &&
                    command.Status == "Pending")
                .ToListAsync(ct);
        }

        public Task<List<DeviceCommand>> GetPendingFacePhotoCommandsAsync(
            Guid bindingId,
            CancellationToken ct = default)
        {
            return _dbContext.DeviceCommands
                .Where(command =>
                    command.FKAccessDeviceBindingId == bindingId &&
                    command.CommandType == "UpsertFacePhoto" &&
                    command.Status == "Pending")
                .ToListAsync(ct);
        }

        public Task<List<DeviceCommand>> GetExhaustedLeasesAsync(
            Guid clientId,
            DateTime now,
            CancellationToken ct = default)
        {
            return _dbContext.DeviceCommands
                .Include(command => command.AccessDeviceBinding)
                .Where(command =>
                    command.FKClientId == clientId &&
                    command.Status == "InProgress" &&
                    command.LeaseExpiresAt <= now &&
                    command.AttemptCount >= command.MaxAttempts)
                .ToListAsync(ct);
        }

        public Task<List<DeviceCommand>> GetLeaseableCommandsAsync(
            Guid clientId,
            Guid agentId,
            DateTime now,
            int take,
            CancellationToken ct = default)
        {
            return _dbContext.DeviceCommands
                .Include(command => command.AccessDevice)
                .Where(command =>
                    command.FKClientId == clientId &&
                    command.AccessDevice != null &&
                    command.AccessDevice.IsActive &&
                    command.AccessDevice.FKAgentId == agentId &&
                    ((command.Status == "Pending" &&
                      (command.NextAttemptAt == null ||
                       command.NextAttemptAt <= now)) ||
                     (command.Status == "InProgress" &&
                      command.LeaseExpiresAt <= now &&
                      command.AttemptCount < command.MaxAttempts)))
                .OrderBy(command => command.CreatedAt)
                .Take(take)
                .ToListAsync(ct);
        }

        public Task<DeviceCommand?> GetForAgentResultAsync(
            Guid commandId,
            CancellationToken ct = default)
        {
            return _dbContext.DeviceCommands
                .Include(command => command.AccessDevice)
                .Include(command => command.AccessDeviceBinding!)
                    .ThenInclude(binding => binding.AccessProfile)
                .FirstOrDefaultAsync(command => command.Id == commandId, ct);
        }

        public Task UpdateStatusAsync(DeviceCommand command, string status, string? resultJson = null, DateTime? processedAt = null)
        {
            command.Status = status;
            command.ResultJson = resultJson;
            command.ProcessedAt = processedAt;
            _dbContext.DeviceCommands.Update(command);
            return Task.CompletedTask;
        }
    }
}