using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using NetTopologySuite.Geometries;
using Omu.ValueInjecter;
using Volo.Abp;
using Volo.Abp.Domain.Repositories;
using Volo.Abp.Domain.Services;
using Win_in.Sfs.Basedata.Boms;
using Win_in.Sfs.Basedata.Domain.Shared;
using Win_in.Sfs.Shared.Domain;
using Win_in.Sfs.Shared.Domain.Shared;

namespace Win_in.Sfs.Basedata.Domain;

public class BomManager : DomainService, IBomManager
{
    private readonly IBomRepository _repository;
    private readonly IItemBasicRepository _itemBasicRepository;

    public BomManager(IBomRepository repository, IItemBasicRepository itemBasicRepository)
    {
        _repository = repository;
        _itemBasicRepository = itemBasicRepository;
    }

    /// <summary>
    /// 获取对应的Bom信息
    /// </summary>
    /// <param name="productItemCode"></param>
    /// <param name="validTime"></param>
    /// <param name="isRecursive"></param>
    /// <returns></returns>
    public virtual async Task<List<Bom>> GetRecursiveListAsync(string productItemCode, DateTime validTime, bool isRecursive = true)
    {
        List<Bom> totalBoms = new List<Bom>();

        var boms = await _repository.GetListAsync(p => p.Product == productItemCode
                                                       && (p.BeginTime <= validTime)
                                                       && (p.EndTime >= validTime)).ConfigureAwait(false);

        if (isRecursive)
        {
            foreach (var bom in boms)
            {
                if (bom.Component == bom.Product)
                {
                    totalBoms.AddRange(boms);

                    continue;
                }

                //获取下级Bom，如果有就继续，没有就完事
                await GetListWithValidTimeAsync(totalBoms, bom, validTime, 1).ConfigureAwait(false);
            }
        }
        else
        {
            foreach (var bom in boms)
            {

                var item = await _itemBasicRepository.FindAsync(p => p.Code == bom.Component).ConfigureAwait(false);
                if (item is { IsPhantom: true })
                {
                    await GetRecursiveListAsync(bom.Component, validTime, isRecursive).ConfigureAwait(false);
                }
                else
                {
                    totalBoms.Add(bom);
                };
            }

        }

        return totalBoms;
    }

    /// <summary>
    /// 递归获取bom
    /// </summary>
    /// <param name="totalBoms"></param>
    /// <param name="bom"></param>
    /// <param name="validTime"></param>
    /// <param name="multipleQty"></param>
    /// <returns></returns>
    private async Task GetListWithValidTimeAsync(List<Bom> totalBoms, Bom bom, DateTime validTime, decimal multipleQty)
    {

        var subboms = await _repository.GetListAsync(p => p.Product == bom.Product
                                                          && p.BeginTime <= validTime
                                                          && p.EndTime >= validTime).ConfigureAwait(false);

        if (subboms == null || subboms.Count == 0)
        {
            //根据bom多层放大倍数，第一次传过来的是1
            bom.ComponentQty *= multipleQty;
            totalBoms.Add(bom);
            return;
        }
        else
        {
            foreach (var subbom in subboms)
            {
                //获取下级Bom，如果有就继续，没有就完事
                await GetListWithValidTimeAsync(totalBoms, subbom, validTime, subbom.ComponentQty * multipleQty).ConfigureAwait(false);
            }

        }
    }

    /// <summary>
    /// 执行导入
    /// </summary>
    public virtual async Task ImportDataAsync(List<Bom> mergeEntities, List<Bom> deleteEntities = null)
    {
        if (deleteEntities != null && deleteEntities.Count > 0)
        {
            await _repository.BulkDeleteAsync(deleteEntities).ConfigureAwait(false);
        }

        await _repository.BulkMergeAsync(mergeEntities).ConfigureAwait(false);
    }

    /// <summary>
    /// 所有子物料号
    /// </summary>
    /// <param name="product"></param>
    /// <returns></returns>
    public virtual async Task<List<Bom>> GetListOfProductAsync(string product)
    {
        return await _repository.GetListAsync(p => p.Product == product).ConfigureAwait(false);
    }

    public virtual async Task<List<Bom>> GetListWithPhantomItemAsync(string productItemCode, string mfgOp, DateTime validTime, bool onlyFromProductionPlan)
    {
        var where = BuildExpression(productItemCode, mfgOp, validTime, onlyFromProductionPlan);

        var entities = await (await _repository.GetDbSetAsync().ConfigureAwait(false)).AsNoTracking().Where(where).ToListAsync().ConfigureAwait(false);
        var phantomItemBoms = await GetPhantomItemBomsAsync(entities, mfgOp, validTime, onlyFromProductionPlan).ConfigureAwait(false);

        return phantomItemBoms;
    }
    private static Expression<Func<Bom, bool>> BuildExpression(string productItemCode, string mfgOp, DateTime validTime, bool onlyFromProductionPlan)
    {
        Expression<Func<Bom, bool>> where = p => p.Product == productItemCode
                                                 // && p.MFGOp == mfgOp
                                                 && p.ComponentQty > 0
                                                 && (p.BeginTime <= validTime)
                                                 && (p.EndTime >= validTime);

        if (onlyFromProductionPlan)
        {
            where = where.And(p => p.DistributionType == EnumDistributionType.FromProductionPlan);
        }

        return where;
    }

    private async Task<List<Bom>> GetPhantomItemBomsAsync(List<Bom> productBoms, string mfgOp, DateTime validTime, bool onlyFromProductionPlan)
    {
        var result = new List<Bom>();

        foreach (var bom in productBoms)
        {
            var item = await _itemBasicRepository.FirstOrDefaultAsync(p => p.Code == bom.Component).ConfigureAwait(false);
            if (item == null)
            {
                throw new UserFriendlyException($"代码为 {bom.Component} 的物品信息不存在.");
            }
            if (item.IsPhantom)
            {
                var where = BuildExpression(item.Code, mfgOp, validTime, onlyFromProductionPlan);
                var query = (await _repository.GetDbSetAsync().ConfigureAwait(false)).AsNoTracking().Where(where);
                Console.WriteLine(query.ToString());
                var phantomItemBoms = await query.ToListAsync().ConfigureAwait(false);
                //递归获取下层BOM的子零件为虚零件的BOM
                var nextLevelBoms = await GetPhantomItemBomsAsync(phantomItemBoms, mfgOp, validTime, onlyFromProductionPlan).ConfigureAwait(false);
                result.AddRange(nextLevelBoms);
            }
            else
            {
                result.Add(bom);
            }
        }
        return result;
    }

    /// <summary>
    /// 所有父物料号
    /// </summary>
    /// <param name="component"></param>
    /// <returns></returns>
    public virtual async Task<List<Bom>> GetListOfComponentAsync(string component)
    {
        return await _repository.GetListAsync(p => p.Component == component).ConfigureAwait(false);
    }

    /// <summary>
    /// 根据总成号、总成数量取所有子物料及其汇总数量
    /// </summary>
    /// <param name="productCode">总成号</param>
    /// <param name="productNum">总成数量</param>
    /// <returns></returns>
    public virtual async Task<List<Bom>> GetMaterialTotalQtyAsync(string productCode, int productNum)
    {
        if (productNum < 1)
        {
            throw new UserFriendlyException("productNum参数值必须大于等于1");
        }
        var lst = await _repository.GetListAsync(p => p.Product == productCode).ConfigureAwait(false);
        foreach (var item in lst)
        {
            item.ComponentQty = item.ComponentQty * productNum;
        }
        return lst;
    }

    /// <summary>
    /// Bom操作
    /// </summary>
    /// <param name="p_component"></param>
    /// <param name="p_type"></param>
    /// <returns></returns>
    private async Task<List<Bom>> GetSubcomponentsRecursiveLast(BomComponent p_component, EnumBomSelectedType p_type
          )
    {
        List<BomComponent> lastList = new List<BomComponent>();
        List<BomComponent> dimensionList=new List<BomComponent>();
        var treeList=await GetSubcomponentsRecursive(p_component, 1, p_component.ComponentQty, p_component.Component,
            (rs) => lastList.Add(rs)
            ,
            (rs1)=>{
                dimensionList.Add(rs1);
            }).ConfigureAwait(false);



        List<Bom> lastBomList = new List<Bom>();
        List<Bom> dimensionBomList = new List<Bom>();
        List<Bom> treeBomList = new List<Bom>();
        foreach (var itm in dimensionList)
        {
            Bom bom = new Bom();
            bom.InjectFrom(itm);
            dimensionBomList.Add(bom);
        }
        foreach (var itm in lastList)
        {
            Bom bom = new Bom();
            bom.InjectFrom(itm);
            lastBomList.Add(bom);
        }
        foreach (var itm in treeList)
        {
            Bom bom = new Bom();
            bom.InjectFrom(itm);
            treeBomList.Add(bom);
        }
        List<Bom> returnList=new List<Bom>();
        switch (p_type)
        {
            case EnumBomSelectedType.Last:
                returnList.AddRange(lastBomList);
                break;
            case EnumBomSelectedType.Tree:
                returnList.AddRange(treeBomList);
                break;
            case EnumBomSelectedType.Dimension:
                returnList.AddRange(dimensionBomList);
                break;
        }
        return returnList;
    }

    /// <summary>
    /// 层级、拆解、一维结构、树状结构
    /// </summary>
    /// <param name="p_component">上级组件(初始时为根元素)</param>
    /// <param name="level">层级一般为1</param>
    /// <param name="sumQty">累计数量</param>
    /// <param name="root">根</param>
    /// <param name="p_actionLast">拆解到最终零件时</param>
    /// <param name="p_actionDimension">树型转成一维表用</param>
    /// <returns></returns>
    private async Task<List<BomComponent>> GetSubcomponentsRecursive(BomComponent p_component, int level, decimal sumQty, string root, Action<BomComponent> p_actionLast,
           Action<BomComponent> p_actionDimension
           )
    {
        List<BomComponent> subComponents = new List<BomComponent>();
        // 假设 GetComponentsByProduct 方法可获取某个物料号下的所有子零件
        List<BomComponent> directSubComponents =await GetComponentsByProduct(p_component.Component).ConfigureAwait(false);

        if (!directSubComponents.Any() && level != 1)//不是根元素
        {
            p_actionLast(p_component);
        }
        foreach (var component in directSubComponents)
        {
            component.Root = root;
            component.SumQty = sumQty * component.ComponentQty;
            component.ParentComponent = p_component.Component;
            component.Level = level;
            component.SubComponents =await GetSubcomponentsRecursive(component, level + 1, sumQty * component.ComponentQty, component.Root, p_actionLast, p_actionDimension).ConfigureAwait(false);
            p_actionDimension(component);
            subComponents.Add(component);
        }
        return subComponents;
    }

    private async Task<List<BomComponent>> GetComponentsByProduct(string product)
    {

        var list=  await _repository.GetListAsync(p => p.Product == product).ConfigureAwait(false);
        List<BomComponent> components = new List<BomComponent>();   
        foreach (var component in list)
        {
            BomComponent bomComponent = new BomComponent();
            bomComponent.InjectFrom(component);
            components.Add(bomComponent);   
        }


        // 其他物料号的子零件信息类似添加
        return components;
    }



















}