using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Hg.Complaint.Domain
{
    /// <summary>
    /// 投诉处理类
    /// </summary>
    public class ComplaintEventSingleton
    {
        private List<ComplaintEventDto> _complaintEvents = new();

        /// <summary>
        /// 投诉处理类
        /// </summary>
        public ComplaintEventSingleton()
        {
        }

        /// <summary>
        /// 获取任务队列
        /// </summary>
        /// <returns></returns>
        public List<ComplaintEventDto> GetComplaintEvents() => _complaintEvents;

        /// <summary>
        /// 移除任务队列
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public List<ComplaintEventDto> RemoveComplaint(int id)
        {
            if (_complaintEvents.Any(x => x.Id.Equals(id)))
            {
                _complaintEvents.Remove(_complaintEvents.First(x => x.Id == id));
            }
            return _complaintEvents;
        }

        /// <summary>
        /// 批量移除任务队列
        /// </summary>
        /// <param name="ids"></param>
        /// <returns></returns>
        public List<ComplaintEventDto> RemoveComplaints(List<int> ids)
        {
            foreach (var id in ids)
            {
                RemoveComplaint(id);
            }
            return _complaintEvents;
        }

        /// <summary>
        /// 获取到期的未处理投诉
        /// </summary>
        /// <returns></returns>
        public List<ComplaintEventDto> GetDueComplaint()
        {
            var now = DateTime.Now;
            var dueHours = DefaultHelper.DueHours;
            var data = new List<ComplaintEventDto>();
            foreach (var complaintEvent in _complaintEvents)
            {
                if (complaintEvent.Ctime.HasValue && (now - complaintEvent.Ctime.Value).TotalHours >= dueHours)
                {
                    data.Add(complaintEvent);
                }
            }
            return data;
        }

        /// <summary>
        /// 添加需要计时的投诉处理
        /// </summary>
        /// <param name="complaintEvent"></param>
        public void AddComplaintEvent(ComplaintEventDto complaintEvent)
        {
            RemoveComplaint(complaintEvent.Id);
            _complaintEvents.Add(complaintEvent);
        }

        /// <summary>
        /// 初始化需要计时的投诉处理
        /// </summary>
        /// <param name="complaintEvents"></param>
        /// <returns></returns>
        public List<ComplaintEventDto> InitComplaintEvents(List<ComplaintEventDto> complaintEvents)
        {
            _complaintEvents = complaintEvents;
            return _complaintEvents;
        }
    }
}