using Ant.Core;
using Ant.DbExpressions;
using Ant.Infrastructure;
using Ant.ORM;
using Ant.ORM.Query;
using Ant.Query.QueryExpressions;
using Ant.Query.QueryState;
using Ant.Query.Visitors;
using Ant.Utility;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;

namespace Ant.Query
{
    class JoiningQuery<T1, T2> : IJoiningQuery<T1, T2>
    {
        AntORM _dbContext;

        QueryBase _rootQuery;
        List<JoiningQueryInfo> _joinedQueries;
        List<LambdaExpression> _filterPredicates;

        public AntORM DbContext { get { return this._dbContext; } }
        public QueryBase RootQuery { get { return this._rootQuery; } }
        public List<JoiningQueryInfo> JoinedQueries { get { return this._joinedQueries; } }
        public List<LambdaExpression> FilterPredicates { get { return this._filterPredicates; } }

        public JoiningQuery(Queryable<T1> q1, Queryable<T2> q2, JoinType joinType, Expression<Func<T1, T2, bool>> on)
        {
            this._dbContext = q1.DbContext;
            this._rootQuery = q1;
            this._joinedQueries = new List<JoiningQueryInfo>(1);

            JoiningQueryInfo joiningQueryInfo = new JoiningQueryInfo(q2, joinType, on);
            this._joinedQueries.Add(joiningQueryInfo);

            this._filterPredicates = new List<LambdaExpression>();

        }

        public JoiningQuery(JoiningQuery<T1, T2> jq, LambdaExpression filterPredicate)
        {
            this._dbContext = jq._dbContext;
            this._rootQuery = jq._rootQuery;
            this._joinedQueries = OrmUtils.Clone(jq._joinedQueries);

            this._filterPredicates = OrmUtils.CloneAndAppendOne(jq._filterPredicates, filterPredicate);
        }


        public IJoiningQuery<T1, T2> Where(Expression<Func<T1, T2, bool>> predicate)
        {
            return new JoiningQuery<T1, T2>(this, predicate);
        }

        public IJoiningQuery<T1, T2, T3> Join<T3>(JoinType joinType, Expression<Func<T1, T2, T3, bool>> on)
        {
            return this.Join<T3>(new Queryable<T3>(this._dbContext), joinType, on);
        }
        public IJoiningQuery<T1, T2, T3> Join<T3>(IQuery<T3> q, JoinType joinType, Expression<Func<T1, T2, T3, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3>(this, (Queryable<T3>)q, joinType, on);
        }

        public IJoiningQuery<T1, T2, T3> InnerJoin<T3>(IQuery<T3> q, Expression<Func<T1, T2, T3, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3>(this, (Queryable<T3>)q, JoinType.InnerJoin, on);
        }
        public IJoiningQuery<T1, T2, T3> LeftJoin<T3>(IQuery<T3> q, Expression<Func<T1, T2, T3, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3>(this, (Queryable<T3>)q, JoinType.LeftJoin, on);
        }
        public IJoiningQuery<T1, T2, T3> RightJoin<T3>(IQuery<T3> q, Expression<Func<T1, T2, T3, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3>(this, (Queryable<T3>)q, JoinType.RightJoin, on);
        }
        public IJoiningQuery<T1, T2, T3> FullJoin<T3>(IQuery<T3> q, Expression<Func<T1, T2, T3, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3>(this, (Queryable<T3>)q, JoinType.FullJoin, on);
        }

        public IJoiningQuery<T1, T2, T3> InnerJoin<T3>(Expression<Func<T1, T2, T3, bool>> on)
        {
            return this.InnerJoin<T3>(new Queryable<T3>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3> LeftJoin<T3>(Expression<Func<T1, T2, T3, bool>> on)
        {
            return this.LeftJoin<T3>(new Queryable<T3>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3> RightJoin<T3>(Expression<Func<T1, T2, T3, bool>> on)
        {
            return this.RightJoin<T3>(new Queryable<T3>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3> FullJoin<T3>(Expression<Func<T1, T2, T3, bool>> on)
        {
            return this.FullJoin<T3>(new Queryable<T3>(this._dbContext), on);
        }


        public IQuery<TResult> Select<TResult>(Expression<Func<T1, T2, TResult>> selector)
        {
            JoinQueryExpression e = new JoinQueryExpression(typeof(TResult), this._rootQuery.QueryExpression, this._joinedQueries, selector);
            return new Queryable<TResult>(this.DbContext, e, this._rootQuery.TrackEntity);
        }
    }

    class JoiningQuery<T1, T2, T3> : IJoiningQuery<T1, T2, T3>
    {
        AntORM _dbContext;

        QueryBase _rootQuery;
        List<JoiningQueryInfo> _joinedQueries;
        List<LambdaExpression> _filterPredicates;

        public AntORM DbContext { get { return this._dbContext; } }
        public QueryBase RootQuery { get { return this._rootQuery; } }
        public List<JoiningQueryInfo> JoinedQueries { get { return this._joinedQueries; } }
        public List<LambdaExpression> FilterPredicates { get { return this._filterPredicates; } }


        public JoiningQuery(JoiningQuery<T1, T2> joiningQuery, Queryable<T3> q, JoinType joinType, Expression<Func<T1, T2, T3, bool>> on)
        {
            //this._dbContext = joiningQuery.DbContext;
            //this._rootQuery = joiningQuery.RootQuery;
            //this._joinedQueries = new List<JoiningQueryInfo>(joiningQuery.JoinedQueries.Count);

            //this._joinedQueries.AddRange(joiningQuery.JoinedQueries);

            //JoiningQueryInfo joiningQueryInfo = new JoiningQueryInfo(q, joinType, on);
            //this._joinedQueries.Add(joiningQueryInfo);

            this._dbContext = joiningQuery.DbContext;
            this._rootQuery = joiningQuery.RootQuery;
            this._joinedQueries = OrmUtils.CloneAndAppendOne(joiningQuery.JoinedQueries, new JoiningQueryInfo(q, joinType, on));

            this._filterPredicates = OrmUtils.Clone(joiningQuery.FilterPredicates);

        }

        public JoiningQuery(JoiningQuery<T1, T2, T3> jq, LambdaExpression filterPredicate)
        {
            this._dbContext = jq._dbContext;
            this._rootQuery = jq._rootQuery;
            this._joinedQueries = OrmUtils.Clone(jq._joinedQueries);

            this._filterPredicates = OrmUtils.CloneAndAppendOne(jq._filterPredicates, filterPredicate);
        }

        public IJoiningQuery<T1, T2, T3> Where(Expression<Func<T1, T2, T3, bool>> predicate)
        {
            return new JoiningQuery<T1, T2, T3>(this, predicate);
        }

        public IJoiningQuery<T1, T2, T3, T4> Join<T4>(JoinType joinType, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return this.Join<T4>(new Queryable<T4>(this._dbContext), joinType, on);
        }
        public IJoiningQuery<T1, T2, T3, T4> Join<T4>(IQuery<T4> q, JoinType joinType, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4>(this, (Queryable<T4>)q, joinType, on);
        }

        public IJoiningQuery<T1, T2, T3, T4> InnerJoin<T4>(IQuery<T4> q, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4>(this, (Queryable<T4>)q, JoinType.InnerJoin, on);
        }
        public IJoiningQuery<T1, T2, T3, T4> LeftJoin<T4>(IQuery<T4> q, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4>(this, (Queryable<T4>)q, JoinType.LeftJoin, on);
        }
        public IJoiningQuery<T1, T2, T3, T4> RightJoin<T4>(IQuery<T4> q, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4>(this, (Queryable<T4>)q, JoinType.RightJoin, on);
        }
        public IJoiningQuery<T1, T2, T3, T4> FullJoin<T4>(IQuery<T4> q, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4>(this, (Queryable<T4>)q, JoinType.FullJoin, on);
        }


        public IJoiningQuery<T1, T2, T3, T4> InnerJoin<T4>(Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return this.InnerJoin<T4>(new Queryable<T4>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3, T4> LeftJoin<T4>(Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return this.LeftJoin<T4>(new Queryable<T4>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3, T4> RightJoin<T4>(Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return this.RightJoin<T4>(new Queryable<T4>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3, T4> FullJoin<T4>(Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            return this.FullJoin<T4>(new Queryable<T4>(this._dbContext), on);
        }



        public IQuery<TResult> Select<TResult>(Expression<Func<T1, T2, T3, TResult>> selector)
        {
            JoinQueryExpression e = new JoinQueryExpression(typeof(TResult), this._rootQuery.QueryExpression, this._joinedQueries, selector);
            return new Queryable<TResult>(this.DbContext, e, this._rootQuery.TrackEntity);
        }
    }

    class JoiningQuery<T1, T2, T3, T4> : IJoiningQuery<T1, T2, T3, T4>
    {
        AntORM _dbContext;

        QueryBase _rootQuery;
        List<JoiningQueryInfo> _joinedQueries;
        List<LambdaExpression> _filterPredicates;

        public AntORM DbContext { get { return this._dbContext; } }
        public QueryBase RootQuery { get { return this._rootQuery; } }
        public List<JoiningQueryInfo> JoinedQueries { get { return this._joinedQueries; } }
        public List<LambdaExpression> FilterPredicates { get { return this._filterPredicates; } }

        //public JoiningQuery(JoiningQuery<T1, T2, T3> joiningQuery, Queryable<T4> q, JoinType joinType, Expression<Func<T1, T2, T3, T4, bool>> on)
        //{
        //    this._dbContext = joiningQuery.DbContext;
        //    this._rootQuery = joiningQuery.RootQuery;
        //    this._joinedQueries = new List<JoiningQueryInfo>(joiningQuery.JoinedQueries.Count);

        //    this._joinedQueries.AddRange(joiningQuery.JoinedQueries);

        //    JoiningQueryInfo joiningQueryInfo = new JoiningQueryInfo(q, joinType, on);
        //    this._joinedQueries.Add(joiningQueryInfo);
        //}

        public JoiningQuery(JoiningQuery<T1, T2, T3> joiningQuery, Queryable<T4> q, JoinType joinType, Expression<Func<T1, T2, T3, T4, bool>> on)
        {
            this._dbContext = joiningQuery.DbContext;
            this._rootQuery = joiningQuery.RootQuery;
            this._joinedQueries = OrmUtils.CloneAndAppendOne(joiningQuery.JoinedQueries, new JoiningQueryInfo(q, joinType, on));

            this._filterPredicates = OrmUtils.Clone(joiningQuery.FilterPredicates);
        }
        public JoiningQuery(JoiningQuery<T1, T2, T3, T4> jq, LambdaExpression filterPredicate)
        {
            this._dbContext = jq._dbContext;
            this._rootQuery = jq._rootQuery;
            this._joinedQueries = OrmUtils.Clone(jq._joinedQueries);

            this._filterPredicates = OrmUtils.CloneAndAppendOne(jq._filterPredicates, filterPredicate);
        }

        public IJoiningQuery<T1, T2, T3, T4> Where(Expression<Func<T1, T2, T3, T4, bool>> predicate)
        {
            return new JoiningQuery<T1, T2, T3, T4>(this, predicate);
        }

        public IJoiningQuery<T1, T2, T3, T4, T5> Join<T5>(JoinType joinType, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return this.Join<T5>(new Queryable<T5>(this._dbContext), joinType, on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> Join<T5>(IQuery<T5> q, JoinType joinType, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4, T5>(this, (Queryable<T5>)q, joinType, on);
        }


        public IJoiningQuery<T1, T2, T3, T4, T5> InnerJoin<T5>(IQuery<T5> q, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4, T5>(this, (Queryable<T5>)q, JoinType.InnerJoin, on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> LeftJoin<T5>(IQuery<T5> q, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4, T5>(this, (Queryable<T5>)q, JoinType.LeftJoin, on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> RightJoin<T5>(IQuery<T5> q, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4, T5>(this, (Queryable<T5>)q, JoinType.RightJoin, on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> FullJoin<T5>(IQuery<T5> q, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return new JoiningQuery<T1, T2, T3, T4, T5>(this, (Queryable<T5>)q, JoinType.FullJoin, on);
        }


        public IJoiningQuery<T1, T2, T3, T4, T5> InnerJoin<T5>(Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return this.InnerJoin<T5>(new Queryable<T5>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> LeftJoin<T5>(Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return this.LeftJoin<T5>(new Queryable<T5>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> RightJoin<T5>(Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return this.RightJoin<T5>(new Queryable<T5>(this._dbContext), on);
        }
        public IJoiningQuery<T1, T2, T3, T4, T5> FullJoin<T5>(Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            return this.FullJoin<T5>(new Queryable<T5>(this._dbContext), on);
        }



        public IQuery<TResult> Select<TResult>(Expression<Func<T1, T2, T3, T4, TResult>> selector)
        {
            JoinQueryExpression e = new JoinQueryExpression(typeof(TResult), this._rootQuery.QueryExpression, this._joinedQueries, selector);
            return new Queryable<TResult>(this.DbContext, e, this._rootQuery.TrackEntity);
        }
    }

    class JoiningQuery<T1, T2, T3, T4, T5> : IJoiningQuery<T1, T2, T3, T4, T5>
    {
        AntORM _dbContext;

        QueryBase _rootQuery;
        List<JoiningQueryInfo> _joinedQueries;
        List<LambdaExpression> _filterPredicates;

        public AntORM DbContext { get { return this._dbContext; } }
        public QueryBase RootQuery { get { return this._rootQuery; } }
        public List<JoiningQueryInfo> JoinedQueries { get { return this._joinedQueries; } }
        public List<LambdaExpression> FilterPredicates { get { return this._filterPredicates; } }


        //老版
        //public JoiningQuery(JoiningQuery<T1, T2, T3, T4> joiningQuery, Queryable<T5> q, JoinType joinType, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        //{
        //    this._dbContext = joiningQuery.DbContext;
        //    this._rootQuery = joiningQuery.RootQuery;
        //    this._joinedQueries = new List<JoiningQueryInfo>(joiningQuery.JoinedQueries.Count);

        //    this._joinedQueries.AddRange(joiningQuery.JoinedQueries);

        //    JoiningQueryInfo joiningQueryInfo = new JoiningQueryInfo(q, joinType, on);
        //    this._joinedQueries.Add(joiningQueryInfo);
        //}
        //public IQuery<TResult> Select<TResult>(Expression<Func<T1, T2, T3, T4, T5, TResult>> selector)
        //{
        //    JoinQueryExpression e = new JoinQueryExpression(typeof(TResult), this._rootQuery.QueryExpression, this._joinedQueries, selector);
        //    return new Queryable<TResult>(this.DbContext, e, this._rootQuery.TrackEntity);
        //}

        public JoiningQuery(JoiningQuery<T1, T2, T3, T4> joiningQuery, Queryable<T5> q, JoinType joinType, Expression<Func<T1, T2, T3, T4, T5, bool>> on)
        {
            this._dbContext = joiningQuery.DbContext;
            this._rootQuery = joiningQuery.RootQuery;
            this._joinedQueries = OrmUtils.CloneAndAppendOne(joiningQuery.JoinedQueries, new JoiningQueryInfo(q, joinType, on));

            this._filterPredicates = OrmUtils.Clone(joiningQuery.FilterPredicates);
        }
        public JoiningQuery(JoiningQuery<T1, T2, T3, T4, T5> jq, LambdaExpression filterPredicate)
        {
            this._dbContext = jq._dbContext;
            this._rootQuery = jq._rootQuery;
            this._joinedQueries = OrmUtils.Clone(jq._joinedQueries);

            this._filterPredicates = OrmUtils.CloneAndAppendOne(jq._filterPredicates, filterPredicate);
        }

        public IJoiningQuery<T1, T2, T3, T4, T5> Where(Expression<Func<T1, T2, T3, T4, T5, bool>> predicate)
        {
            return new JoiningQuery<T1, T2, T3, T4, T5>(this, predicate);
        }

        public IQuery<TResult> Select<TResult>(Expression<Func<T1, T2, T3, T4, T5, TResult>> selector)
        {
            if (this._filterPredicates.Count == 0)
            {
                JoinQueryExpression e1 = new JoinQueryExpression(typeof(TResult), this._rootQuery.QueryExpression, this._joinedQueries, selector);
                return new Queryable<TResult>(this.DbContext, e1, this._rootQuery.TrackEntity);
            }

            Type joinResultType = typeof(JoinResult<T1, T2, T3, T4, T5>);

            Expression<Func<T1, T2, T3, T4, T5, JoinResult<T1, T2, T3, T4, T5>>> joinResultSelector = (t1, t2, t3, t4, t5) => new JoinResult<T1, T2, T3, T4, T5>() { Item1 = t1, Item2 = t2, Item3 = t3, Item4 = t4, Item5 = t5 };
            JoinQueryExpression e = new JoinQueryExpression(joinResultType, this._rootQuery.QueryExpression, this._joinedQueries, joinResultSelector);
            IQuery<JoinResult<T1, T2, T3, T4, T5>> q = new Queryable<JoinResult<T1, T2, T3, T4, T5>>(this.DbContext, e, this._rootQuery.TrackEntity);


            ParameterExpression parameter = Expression.Parameter(joinResultType, "a");
            Expression[] expressionSubstitutes = QueryHelper.MakeExpressionSubstitutes(joinResultType, parameter);

            Expression<Func<JoinResult<T1, T2, T3, T4, T5>, bool>> predicate = QueryHelper.ComposePredicate<Func<JoinResult<T1, T2, T3, T4, T5>, bool>>(this._filterPredicates, expressionSubstitutes, parameter);
            var q1 = q.Where(predicate);

            Expression<Func<JoinResult<T1, T2, T3, T4, T5>, TResult>> selector2 = JoinQueryParameterExpressionReplacer.Replace(selector, expressionSubstitutes, parameter) as Expression<Func<JoinResult<T1, T2, T3, T4, T5>, TResult>>;

            var ret = q1.Select(selector2);
            return ret;
        }

        
    }

}