using Application.Domain.Entities;
using Infrastructure.Application;
using Infrastructure.Data;
using Infrastructure.Extensions;
using Infrastructure.Web.Mvc;
using IoT.Shared.Areas.Admin.Controlls;
using IoTCenter.Application.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System;
using System.Linq;

namespace IoTCenter.Areas.Admin.Controllers
{
    [Authorize]
    [Area(nameof(Admin))]
    public class AreaController : CrudController<Area, EditAreaModel>
    {
        private readonly AjaxController _ajax;

        public AreaController(IRepository<Area> repo, AjaxController ajax) : base(repo)
        {
            this._ajax = ajax;
        }

        public override IQueryable<Area> Include(IQueryable<Area> query)
        {
            return query.Include(o => o.Parent);
        }

        public override IQueryable<Area> Query(PagedListModel<EditAreaModel> model, IQueryable<Area> query)
        {
            return query.Where(o => o.ParentId != null);
        }

        public override void ToDisplayModel(Area entity, EditAreaModel model)
        {
            if (entity.ParentId != null && entity.Parent.ParentId != null)
            {
                ViewData.Add(model.ParentId, entity.Parent.Name);
            }
        }

        public override void ToEditModel(Area entity, EditAreaModel model)
        {
            ViewData.SelectList(o => model.ParentId, () => this._ajax.GetAreaSelectList(model.ParentId, model.Id));
        }

        public override void ToEntity(EditAreaModel model, Area entity)
        {
            if (!model.ParentId.HasValue)
            {
                var root = this.Repo.ReadOnlyTable().FirstOrDefault(o => o.ParentId == null);
                if (root == null)
                {
                    root = new Area
                    {
                        Name = "区域",
                        Number = "Area",
                    };
                    this.Repo.Add(root);
                    this.Repo.SaveChanges();
                }
                entity.ParentId = root.Id;
            }
        }

        public override IActionResult Add(EditAreaModel model)
        {
            if (ModelState.IsValid)
            {
                try
                {
                    var entity = new Area();
                    entity.From(model);
                    this.ToEntity(model, entity);
                    this.Repo.Add(entity);
                    this.Repo.SaveChanges();
                    Update();
                    return this.Success();
                }
                catch (DbUpdateException ex)
                {
                    ex.PrintStack();
                    ModelState.AddModelError("", $"{ex.Message}{ex.InnerException?.Message}");
                }
            }
            this.ToEditModel(null, model);
            return Result(model);
        }

        public override IActionResult Edit(EditAreaModel model)
        {
            var id = model.Id;
            var query = this.Repo.Table();
            query = this.Include(query);
            var entity = query.FirstOrDefault(o => o.Id == id);
            if (ModelState.IsValid)
            {
                try
                {
                    if (model.ParentId != null)
                    {
                        if (model.ParentId == model.Id)
                        {
                            throw new Exception("上级节点不能是当前节点");
                        }
                        var parent = this.Repo.Table().ToList().FirstOrDefault(o => o.Id == model.ParentId);
                        while (parent.ParentId.HasValue)
                        {
                            if (parent.ParentId == model.Id)
                            {
                                throw new Exception("上级节点不能是当前节点的下级节点");
                            }
                            else
                            {
                                parent = parent.Parent;
                            }
                        }
                    }
                    entity.From(model, skipReadonly: true);
                    this.ToEntity(model, entity);
                    this.Repo.SaveChanges();
                    return this.Success();
                }
                catch (Exception ex)
                {
                    ex.PrintStack();
                    ModelState.AddModelError("", ex.Message);
                }
            }
            this.ToEditModel(entity, model);
            return Result(model);
        }

        private void Update()
        {
            var root = this.Repo.Table().ToList().FirstOrDefault(o => o.ParentId == null);
            root.Update();
            this.Repo.SaveChanges();
        }
    }
}