using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using Luticate2.Utils.DataAccess;
using Luticate2.Utils.Dbo.Filter;
using Luticate2.Utils.Dbo.Result;
using Microsoft.EntityFrameworkCore;
using WebApiWebSem.DataAccess.Models;
using WebApiWebSem.Dbo.Articles;

namespace WebApiWebSem.DataAccess
{
    public class ArticlesDataAccess : LuEfCrudDataAccess<articles, ArticlesAddDbo, ArticlesDbo, ArticlesEditDbo, WsDbContext, string>
    {
        protected static IList<string> Types = new List<string>{"home", "persons", "locations", "countries"};

        public ArticlesDataAccess(IServiceProvider serviceProvider) : base(serviceProvider)
        {
        }

        protected override object GetId(string id)
        {
            return id;
        }

        protected override IQueryable<articles> GetGetQueryable(WsDbContext db, IQueryable<articles> table)
        {
            return table.Include(articles => articles.articles_fields_fk);
        }

        protected override IQueryable<articles> GetEditQueryable(WsDbContext db, IQueryable<articles> table)
        {
            return GetGetQueryable(db, table);
        }

        protected override DbSet<articles> GetTable(WsDbContext db)
        {
            return db.articles;
        }

        protected string GetFilterType(LuFilterDbo filter)
        {
            var type = filter.GetFilterString("type", null);
            if (type == null || !Types.Contains(type.ToLower()))
            {
                return null;
            }
            return type.ToLower();
        }

        protected override Expression<Func<articles, bool>> GetFilterExpression(LuFilterDbo filter)
        {
            var type = GetFilterType(filter);
            var q = string.IsNullOrEmpty(filter.Query) ? null : filter.Query;
            return articles => (type == null || articles.type == type) &&
                               (q == null || (WsDbContext.lu_texts_match(q, articles.text) ||
                                              WsDbContext.lu_texts_match(q, articles.id)));
        }

        protected override articles GetModelFromTCreate(ArticlesAddDbo obj)
        {
            return new articles
            {
                id = obj.Id,
                picture_caption = obj.PictureCaption,
                picture_url = obj.PictureUrl,
                type = obj.Type,
                articles_fields_fk = obj.Fields.Select(dbo => new articles_fields
                {
                    property = dbo.Property,
                    type = dbo.Type,
                    value = dbo.Value
                }).ToList(),
                text = obj.Text
            };
        }

        protected override void EditModelFromTUpdate(ArticlesEditDbo obj, articles model)
        {
            model.picture_caption = obj.PictureCaption;
            model.picture_url = obj.PictureUrl;
            model.text = obj.Text;
        }

        protected override LuResult<bool> _EditSingleById(articles model, ArticlesEditDbo update, WsDbContext db, IQueryable<articles> table)
        {
            foreach (var removed in model.articles_fields_fk.Where(fields => update.Fields.FirstOrDefault(dbo => dbo.Property == fields.property) == null).ToList())
            {
                model.articles_fields_fk.Remove(removed);
            }
            foreach (var field in model.articles_fields_fk)
            {
                var f = update.Fields.First(dbo => dbo.Property == field.property);
                field.value = f.Value;
                field.property = f.Property;
                field.type = f.Type;
            }
            foreach (var added in update.Fields.Where(dbo => model.articles_fields_fk.FirstOrDefault(fields => dbo.Property == fields.property) == null))
            {
                model.articles_fields_fk.Add(new articles_fields
                {
                    value = added.Value,
                    property = added.Property,
                    type = added.Type,
                    article_id = model.id
                });
            }
            return LuResult<bool>.Ok(true);
        }

        protected override ArticlesDbo GetDboFromModel(articles model)
        {
            return model.ToDbo();
        }
    }
}