using Model;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Web;
using System.Web.Http;
using System.Web.Http.Results;
using static GuaDanStatusCode;

/// <summary>
/// HandleBedInUsedController 的摘要描述
/// </summary>
public class HandleBedInUsedController : ApiController
{
    private Model.ezEntities _db = new Model.ezEntities();
    public HandleBedInUsedController()
    {
        //
        // TODO: 在這裡新增建構函式邏輯
        //
    }
    [HttpPost]
    [Route("api/bed/inuse/list")]
    public IHttpActionResult Get([FromBody] UuidModel uuidModel)
    {
        //獲取已被預約或者正在入住的床位，如果有指定就會查詢指定條件，如果沒有指定就會返回所有
        var query = _db.GuaDanOrderGuest
            .Where(gd => gd.StatusCode == GuaDanStatusCode.Guadan.CheckedIn
            || gd.StatusCode == GuaDanStatusCode.Guadan.Booked).ToList();
        if (uuidModel.bedUuid.HasValue)
        {
            // 優先按床位查詢
            query = query.Where(g => g.BedUuid == uuidModel.bedUuid.Value).ToList();
        }
        else if (uuidModel.roomUuid.HasValue)
        {
            // 如果沒有 bed，但有 room
            query = query.Where(g => g.RoomUuid == uuidModel.roomUuid.Value).ToList();
        }
        else if (uuidModel.regionUuid.HasValue)
        {
            // 如果只有 region
            //query = query.Where(g => g.Room.RegionUuid == uuidModel.regionUuid.Value);
            query = query.Where(g => IsRegionOrAncestor(g.Room, uuidModel.regionUuid.Value)).ToList();

        }
        var data = query.Select(g => new
        {
            g.BedUuid,
            g.RoomUuid,
            g.Room.RegionUuid,
            g.GuaDanOrderNo,
            g.RegionRoomBed.Name,
            fullName = GetFullBedName(g.BedUuid.Value),
            g.followers.u_name,
            guadan_during = new { g.CheckInAt, g.CheckOutAt },
            status = new { g.StatusCode, g.RegionRoomBedStatus.Name }
        });
        return Ok(data.ToList());
    }

    [HttpPost]
    [Route("api/bed/inuse/cancel/singlebed/booking")]
    public IHttpActionResult CancelSingleBedBooking([FromBody] UuidModel uuidModel)
    {
        if (uuidModel?.bedUuid == null)
            return BadRequest("床位ID不能為空");

        using (var transaction = _db.Database.BeginTransaction())
        {
            try
            {
                // 查詢符合條件的訂單
                var orders = _db.GuaDanOrderGuest
                    .Where(g => g.BedUuid == uuidModel.bedUuid)
                    .Where(g => g.StatusCode == GuaDanStatusCode.Guadan.Booked || g.StatusCode == GuaDanStatusCode.Guadan.CheckedIn)
                    .ToList();

                if (!orders.Any())
                    return NotFound();

                // 更新狀態
                foreach (var order in orders)
                {
                    if (!StatusTransitionManager.CanTransition(order.StatusCode, GuaDanStatusCode.Guadan.Cancelled))
                    {
                        return BadRequest("當前狀態不能被取消");
                    }


                    order.StatusCode = GuaDanStatusCode.Guadan.Cancelled; // 假設Cancelled是取消狀態
                }
                var schedules = _db.RegionAndRoomAndBedSchedule
                    .Where(s => s.TargetUuid == uuidModel.bedUuid)
                    .Where(s => s.GuaDanOrderGuest.StatusCode == GuaDanStatusCode.Guadan.Booked
                    || s.GuaDanOrderGuest.StatusCode == GuaDanStatusCode.Guadan.CheckedIn)
                    .ToList();
                foreach (var schedule in schedules)
                {
                    schedule.IsCancel = true;
                }
                _db.SaveChanges();
                transaction.Commit();

                return Ok(new { message = "取消成功", cancelledCount = orders.Count });
            }
            catch (Exception ex)
            {
                transaction.Rollback();
                return InternalServerError(ex);
            }
        }
    }
    [HttpGet]
    [Route("api/bed/inuse/region/list")]
    public IHttpActionResult GetRegionList()
    {
        var regions = _db.Region
            .Select(r => new
            {
                r.Uuid,
                r.Name,
            })
            .ToList();
        return Ok(regions);
    }
    [HttpGet]
    [Route("api/bed/inuse/room/list")]
    public IHttpActionResult GetRoomList([FromUri] Guid? regionUuid = null)
    {
        var room = _db.Room.Where(r => !r.IsDeleted && r.IsActive.Value).ToList();
        if (regionUuid != null)
        {
            room = room.Where(r => IsRegionOrAncestor(r, regionUuid.Value)).ToList();
        }
        var data = room.Select(r => new
        {
            r.Uuid,
            r.Name,
            fullName = r.Region.Name + "/" + r.Name,
        }).ToList();
        return Ok(data);
    }
    public string GetFullBedName(Guid bedUuid)
    {
        var bed = _db.RegionRoomBed.Find(bedUuid);
        if (bed == null)
            return "";
        var name = bed.Name;
        var room = bed.Room;
        if (room == null)
            return name;
        name = room.Name + "/" + name;

        var region = room?.Region;
        while (region != null)
        {
            name = region.Name + "/" + name;
            region = region.Region2; // 遞迴向上
        }

        return name;
    }
    bool IsRegionOrAncestor(Model.Room room, Guid regionUuid)
    {
        //判斷傳入的regionuuid是否是room的祖先
        if (room.RegionUuid == regionUuid)
            return true;
        var region = room.Region;
        while (region != null)
        {
            if (region.Uuid == regionUuid) return true;
            region = region.Region2;
        }
        return false;
    }
    public class UuidModel
    {
        public Guid? regionUuid = null;
        public Guid? roomUuid = null;
        public Guid? bedUuid = null;
    }
}