using Kean.Domain.Task.Commands;
using Kean.Domain.Task.Enums;
using Kean.Domain.Task.Repositories;
using System.Collections.Generic;
using System.Threading;

namespace Kean.Domain.Task.CommandHandlers
{
    /// <summary>
    /// 创建启用命令处理程序
    /// </summary>
    public sealed class EnableCommandHandler : CommandHandler<EnableCommand>
    {
        private readonly ICommandBus _commandBus; // 命令总线
        private readonly IWarehouseRepository _warehouseRepository; // 库房仓库

        /// <summary>
        /// 依赖注入
        /// </summary>
        public EnableCommandHandler(
            ICommandBus commandBus,
            IWarehouseRepository warehouseRepository)
        {
            _commandBus = commandBus;
            _warehouseRepository = warehouseRepository;
        }

        /// <summary>
        /// 处理程序
        /// </summary>
        public override async System.Threading.Tasks.Task Handle(EnableCommand command, CancellationToken cancellationToken)
        {
            if (command.ValidationResult.IsValid)
            {
                var states = new Queue<bool?>();
                foreach (var item in command.Cells)
                {
                    var cell = await _warehouseRepository.GetCellByName(item, command.Warehouse);
                    switch (cell?.State)
                    {
                        case CellState.Enabled:
                            states.Enqueue(true);
                            break;
                        case CellState.Selected:
                            states.Enqueue(true);
                            break;
                        case CellState.Disabled:
                            await _warehouseRepository.ReleaseCell(cell.Id);
                            states.Enqueue(true);
                            break;
                        default:
                            states.Enqueue(null);
                            break;
                    }
                }
                Output(nameof(command.States), states);
            }
            else
            {
                await _commandBus.Notify(command.ValidationResult,
                    cancellationToken: cancellationToken);
            }
        }
    }
}