using System.Collections.Generic;

namespace HotelPms.Data.UseInfo;

/// <summary>
/// 画面中制御時データの加工
/// </summary>
public partial class Use
{
    public int GetTotalStay()
    {
        var cinDate = DetailList[0].CinDate;
        var coutDate = DetailList[0].CoutDate;
        for (int i = 1; i < DetailList.Count; i++)
        {
            if (DetailList[i].CinDate.CompareTo(cinDate) < 0) { cinDate = DetailList[i].CinDate; }
            if (DetailList[i].CoutDate.CompareTo(coutDate) > 0) { coutDate = DetailList[i].CoutDate; }
        }
        return coutDate.Subtract(cinDate);
    }

    /// <summary>
    /// 利用日を指定し、データを返す
    /// </summary>
    /// <param name="useDate"></param>
    /// <returns></returns>
    public List<UseRoom> GetUseRoomList(string useDate)
    {
        List<UseRoom> list = new(); 
        foreach (UseDetail detail in DetailList)
        {
            list.AddRange(detail.GetUseRoomList(useDate));
        }
        return list;
    }

    /// <summary>
    /// 利用部屋存在しない明細を取得する
    /// </summary>
    /// <param name="useDate"></param>
    /// <returns></returns>
    public UseDetail? GetDetailWithoutUseRoom(string useDate)
    {
        try
        {
            foreach(var detail in DetailList)
            {
                if (!detail.ExistsUseRoom(useDate))
                { 
                    return detail; 
                }
            }
            return null;
        }
        catch
        {
            return null;
        }
    }
}