using System.Diagnostics.CodeAnalysis;
using WIDESEAWCS_Common.TaskEnum;
using WIDESEAWCS_ITaskInfoService;
using WIDESEAWCS_Model.Models;
using WIDESEAWCS_QuartzJob;
using WIDESEAWCS_QuartzJob.Models;
using WIDESEAWCS_QuartzJob.Service;

namespace WIDESEAWCS_Tasks
{
    /// <summary>
    /// 分容堆垛机任务选择器：封装任务挑选与站台可用性判断。
    /// </summary>
    public class FormationStackerCraneTaskSelector
    {
        private readonly ITaskService _taskService;
        private readonly IRouterService _routerService;

        public FormationStackerCraneTaskSelector(ITaskService taskService, IRouterService routerService)
        {
            _taskService = taskService;
            _routerService = routerService;
        }

        public Dt_Task? SelectTask(SpeFormationStackerCrane commonStackerCrane)
        {
            Dt_Task? task;
            if (commonStackerCrane.LastTaskType == null)
            {
                task = _taskService.QueryStackerCraneTask(commonStackerCrane.DeviceCode);
            }
            else if (commonStackerCrane.LastTaskType.GetValueOrDefault().GetTaskTypeGroup() == TaskTypeGroup.OutbondGroup)
            {
                task = _taskService.QueryStackerCraneInTask(commonStackerCrane.DeviceCode);
                task ??= _taskService.QueryStackerCraneOutTask(commonStackerCrane.DeviceCode);
            }
            else
            {
                task = _taskService.QueryStackerCraneOutTask(commonStackerCrane.DeviceCode);
            }

            if (task != null && task.TaskType.GetTaskTypeGroup() == TaskTypeGroup.OutbondGroup)
            {
                if (IsOutTaskStationAvailable(task))
                {
                    return task;
                }

                var otherOutStationCodes = _routerService
                    .QueryNextRoutes(commonStackerCrane.DeviceCode, task.NextAddress, task.TaskType)
                    .Select(x => x.ChildPosi)
                    .ToList();

                var tasks = _taskService.QueryStackerCraneOutTasks(commonStackerCrane.DeviceCode, otherOutStationCodes);
                foreach (var alternativeTask in tasks)
                {
                    if (IsOutTaskStationAvailable(alternativeTask))
                    {
                        return alternativeTask;
                    }
                }

                task = _taskService.QueryStackerCraneInTask(commonStackerCrane.DeviceCode);
            }

            return task;
        }

        private bool IsOutTaskStationAvailable([NotNull] Dt_Task task)
        {
            Dt_Router? router = _routerService.QueryNextRoute(task.Roadway, task.NextAddress, task.TaskType);
            if (router == null)
            {
                _taskService.UpdateTaskExceptionMessage(task.TaskNum, $"未找到站台【{task.NextAddress}】信息，无法校验站台");
                return false;
            }

            IDevice? device = Storage.Devices.FirstOrDefault(x => x.DeviceCode == router.ChildPosiDeviceCode);
            if (device == null)
            {
                _taskService.UpdateTaskExceptionMessage(task.TaskNum, $"未找到出库站台【{router.ChildPosiDeviceCode}】对应的通讯对象，无法判断出库站台是否被占用");
                return false;
            }

            CommonConveyorLine conveyorLine = (CommonConveyorLine)device;
            return conveyorLine.IsOccupied(router.ChildPosi);
        }
    }
}