using Dlhis.Entity.Canteen.Entities;
using Dlhis.Entity.Canteen.Enums;
using Kurisu.AspNetCore.Utils.Extensions;
using SqlSugar;
using Dlhis.Basic.Dishes.Request;
using Dlhis.Basic.Dishes.Response;
using Dlhis.Basic.Dishes.Dto;
using System.Linq.Expressions;
using Dlhis.Basic.Places.Services;
using Kurisu.AspNetCore.CustomClass;
using Kurisu.AspNetCore.DataAccess.Dto;
using Kurisu.AspNetCore.DataAccess.SqlSugar.Extensions;
using Kurisu.AspNetCore.DataAccess.SqlSugar.Services;

namespace Dlhis.Basic.Dishes.Services.Implements;

public class DishesMenuService : IDishesMenuService
{
    private readonly IDbContext _dbContext;
    private readonly IBusinessPlacePermissionsService _businessPlacePermissionsService;

    public DishesMenuService(IDbContext dbContext, IBusinessPlacePermissionsService businessPlacePermissionsService)
    {
        _dbContext = dbContext;
        _businessPlacePermissionsService = businessPlacePermissionsService;
    }

    public async Task<Pagination<DishesMenuPageResponse>> GetDishesMenuPageAsync(DishesMenuPageRequest request)
    {
        return await _dbContext.Queryable<DishesMenuEntity>()
            .Where(x => x.BusinessPlaceCode == request.BusinessPlaceCode)
            .GroupBy(x => new { x.BusinessPlaceCode, x.CustomCode, x.StartDate, x.EndDate })
            .Select(x => new DishesMenuPageResponse
            {
                BusinessPlaceCode = x.BusinessPlaceCode,
                CustomCode = x.CustomCode,
                StartDate = x.StartDate,
                EndDate = x.EndDate,
            })
            .ToPageListAsync(request);
    }

    public async Task<DishesMenuSaveRequest> GetDishesMenuDetailAsync(Guid businessPlaceCode, string customCode, DateTime startDate, DateTime endDate)
    {
        var data = await _dbContext.Queryable<DishesMenuEntity>()
            .Where(x => x.BusinessPlaceCode == businessPlaceCode)
            .Where(x => x.CustomCode == customCode)
            .Where(x => x.StartDate == startDate)
            .Where(x => x.EndDate == endDate)
            .ToListAsync();

        if (data.IsEmpty())
        {
            return new DishesMenuSaveRequest
            {
                BusinessPlaceCode = businessPlaceCode,
                Items = new List<DishesMenuNameDateSaveRequest> { }
            };
        }

        return new DishesMenuSaveRequest
        {
            BusinessPlaceCode = businessPlaceCode,
            Items = new List<DishesMenuNameDateSaveRequest>
            {
                new()
                {
                    CustomCode = customCode,
                    Period = new DateTimePeriod
                    {
                        Start = data[0].StartDate,
                        End = data[0].EndDate,
                    },
                    ShiftTypes = data.GroupBy(x => x.ShiftType).Select(item =>
                    {
                        var shiftType = item.Key;

                        return new DishesMenuShiftTypeSaveRequest
                        {
                            ShiftType = shiftType,
                            Dishes = item.Select(x => new MenuDishesSaveRequest
                            {
                                DishesCode = x.DishesCode,
                                Number = x.Number,
                                Price = x.Price,
                            }).ToList()
                        };
                    }).ToList()
                }
            }
        };
    }

    public async Task<List<DishesDetailResponse>> GetDishesUnderCurrentMenuAsync(Guid businessPlaceCode, DateTime date, ShiftEnumType? shiftType, Guid categoryCode)
    {
        var data = await _dbContext.Queryable<DishesMenuEntity>()
            .LeftJoin<DishesEntity>((x, dishes) => x.DishesCode == dishes.CustomCode)
            .Where(x => x.BusinessPlaceCode == businessPlaceCode)
            .Where(x => x.StartDate <= date && date <= x.EndDate)
            .Where((x, dishes) => dishes.Enable)
            .WhereIF(shiftType.HasValue, x => x.ShiftType == shiftType)
            .Where((x, dishes) => dishes.CategoryCode == categoryCode)
            .Select((x, dishes) => new DishesDetailResponse
            {
                BusinessPlaceCode = x.BusinessPlaceCode,
                CategoryCode = dishes.CategoryCode,
                CustomCode = dishes.CustomCode,
                Description = dishes.Description,
                ImageUrl = dishes.ImageUrl,
                Price = SqlFunc.IIF(x.Price > 0, x.Price, dishes.Price),
                Name = dishes.Name,
                Number = x.Number,
                CurrentUnits = dishes.Units.ToString()
            })
            .ToListAsync();

        return data;
    }

    public async Task SaveDishesMenuAsync(DishesMenuSaveRequest request)
    {
        //检验数据
        CheckDuplicateData(request);

        //检验权限
        var res = await _businessPlacePermissionsService.GetMyAsync();
        var myBps = res.Select(x => x.Code).ToList();
        myBps.Contains(request.BusinessPlaceCode).ThrowIfFalse("非经营营业点,无法保存菜单");

        var entities = request.Items.SelectMany(item =>
        {
            var customCode = item.CustomCode;
            var period = item.Period;

            return item.ShiftTypes.SelectMany(shiftTypeItem =>
            {
                var shiftType = shiftTypeItem.ShiftType;

                return shiftTypeItem.Dishes.Select(dishesItem =>
                {
                    var dishesCode = dishesItem.DishesCode;
                    var number = dishesItem.Number;
                    var price = dishesItem.Price;

                    return new DishesMenuEntity
                    {
                        BusinessPlaceCode = request.BusinessPlaceCode,
                        CustomCode = customCode,
                        StartDate = period.Start.Value,
                        EndDate = period.End.Value,
                        ShiftType = shiftType,
                        DishesCode = dishesCode,
                        Number = number,
                        Price = price,

                        Type = CanteenApplicationTypeEnumType.Booking,
                        Version = 0,
                    };
                });
            });
        }).ToList();

        var keys = entities.DistinctBy(x => new { x.CustomCode, x.StartDate, x.EndDate, x.ShiftType })
            .Select(x => new { x.CustomCode, x.StartDate, x.EndDate, x.ShiftType })
            .ToList();
        var deleteWhere = LinqExpressionExtensions.False<DishesMenuEntity>();
        keys.ForEach(x =>
        {
            deleteWhere = deleteWhere.Or(item => item.BusinessPlaceCode == request.BusinessPlaceCode
                                                 && item.CustomCode == x.CustomCode
                                                 //&& SqlFunc.DateIsSame(item.StartDate, x.StartDate, DateType.Day)
                                                 //&& SqlFunc.DateIsSame(item.EndDate, x.EndDate, DateType.Day)
                                                 && item.ShiftType == x.ShiftType);
        });

        await _dbContext.Client.Deleteable<DishesMenuEntity>().Where(deleteWhere).ExecuteCommandAsync();

        if (request.Items.Any())
        {
            Expression<Func<DishesMenuEntity, bool>> whereCheck = LinqExpressionExtensions.False<DishesMenuEntity>();
            request.Items.ForEach(p =>
            {
                whereCheck = whereCheck.Or(x => x.BusinessPlaceCode == request.BusinessPlaceCode
                                                && !(x.EndDate < p.Period.Start || x.StartDate > p.Period.End)
                );
            });

            var duplicate = await _dbContext.Queryable<DishesMenuEntity>().Where(whereCheck).AnyAsync();
            duplicate.ThrowIfTrue("菜单时效冲突");
        }

        await _dbContext.InsertAsync(entities);
    }

    public async Task<DishesMenuDetailDto> GetBookingDishesDetailAsync(DateTime date, Guid businessPlaceCode, ShiftEnumType shiftType, string dishesCode)
    {
        var detail = await _dbContext.Queryable<DishesMenuEntity>()
            .LeftJoin<DishesEntity>((x, d) => x.DishesCode == d.CustomCode)
            .Where(x => x.StartDate <= date && date <= x.EndDate)
            .Where(x => x.BusinessPlaceCode == businessPlaceCode)
            .Where(x => x.ShiftType == shiftType)
            .Where(x => x.DishesCode == dishesCode)
            .Where((x, d) => d.Enable)
            .Select((x, d) => new DishesMenuDetailDto
            {
                Date = date,
                MenuId = x.Id,
                DishesId = d.Id,
                DishesCode = d.CustomCode,
                DishesName = d.Name,
                Price = x.Price == null || x.Price == 0 ? d.Price : x.Price.Value,
                Number = x.Number,
                Version = x.Version,
            })
            .SingleAsync();

        return detail;
    }

    //*********************************************************help methods**********************************************************************

    private static void CheckDuplicateData(DishesMenuSaveRequest request)
    {
        (request.Items.DistinctBy(x => new { x.CustomCode, x.Period.Start, x.Period.End }).Count() != request.Items.Count).ThrowIfTrue("菜单不可重复");

        foreach (var item in request.Items)
        {
            var u = item.Period.Start.Value.ToString("yyyy-MM-dd") + "." + item.Period.End.Value.ToString("yyyy-MM-dd") + "." + item.CustomCode;

            (item.ShiftTypes.DistinctBy(x => x.ShiftType).Count() != item.ShiftTypes.Count).ThrowIfTrue($"{u}的餐次不可重复添加");

            foreach (var shiftTypeItem in item.ShiftTypes)
            {
                (shiftTypeItem.Dishes.DistinctBy(x => x.DishesCode).Count() != shiftTypeItem.Dishes.Count)
                    .ThrowIfTrue($"{u}的{shiftTypeItem.ShiftType.GetDescription()}下菜品不可重复");
            }
        }
    }
}