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/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mysema.query.jpa;

import java.util.List;

import com.google.common.collect.Lists;
import com.mysema.query.DefaultQueryMetadata;
import com.mysema.query.JoinExpression;
import com.mysema.query.JoinType;
import com.mysema.query.QueryMetadata;
import com.mysema.query.support.DetachableQuery;
import com.mysema.query.support.Expressions;
import com.mysema.query.types.*;
import com.mysema.query.types.query.NumberSubQuery;
import com.mysema.query.types.template.NumberTemplate;

/**
 * Abstract superclass for SubQuery implementations
 *
 * @author tiwe
 *
 * @param  concrete subtype
 */
public class AbstractJPASubQuery> extends DetachableQuery implements JPQLSubQuery {

    private final JPAQueryMixin queryMixin;

    public AbstractJPASubQuery() {
        this(new DefaultQueryMetadata().noValidate());
    }

    @SuppressWarnings("unchecked")
    public AbstractJPASubQuery(QueryMetadata metadata) {
        super(new JPAQueryMixin(metadata));
        super.queryMixin.setSelf((Q)this);
        this.queryMixin = (JPAQueryMixin) super.queryMixin;
    }

    @Override
    public NumberSubQuery count() {
        StringBuilder count = new StringBuilder("count(");
        List> args = Lists.newArrayList();
        for (JoinExpression join : queryMixin.getMetadata().getJoins()) {
            if (join.getType() == JoinType.DEFAULT) {
                if (!args.isEmpty()) {
                    count.append(", ");
                }
                count.append("{" + args.size() + "}");
                args.add(join.getTarget());
            }
        }
        count.append(")");
        return unique(NumberTemplate.create(Long.class, count.toString(), args.toArray()));
    }

    public Q from(EntityPath o) {
        return queryMixin.from(o);
    }

    @Override
    public Q from(EntityPath... o) {
        return queryMixin.from(o);
    }

    @Override
    public  Q from(CollectionExpression target, Path
 alias) {
        return queryMixin.from(Expressions.as((Path)target, alias));
    }

    @Override
    @Deprecated
    public 
 Q fullJoin(CollectionExpression target) {
        return queryMixin.fullJoin(target);
    }

    @Override
    @Deprecated
    public 
 Q fullJoin(CollectionExpression target, Path
 alias) {
        return queryMixin.fullJoin(target, alias);
    }

    @Override
    @Deprecated
    public 
 Q fullJoin(EntityPath
 target) {
        return queryMixin.fullJoin(target);
    }

    @Override
    @Deprecated
    public 
 Q fullJoin(EntityPath
 target, Path
 alias) {
        return queryMixin.fullJoin(target, alias);
    }

    @Override
    @Deprecated
    public 
 Q fullJoin(MapExpression target) {
        return queryMixin.fullJoin(target);
    }

    @Override
    @Deprecated
    public 
 Q fullJoin(MapExpression target, Path
 alias) {
        return queryMixin.fullJoin(target, alias);
    }

    @Override
    public 
 Q innerJoin(CollectionExpression target) {
        return queryMixin.innerJoin(target);
    }

    @Override
    public 
 Q innerJoin(CollectionExpression target, Path
 alias) {
        return queryMixin.innerJoin(target, alias);
    }

    @Override
    public 
 Q innerJoin(EntityPath
 target) {
        return queryMixin.innerJoin(target);
    }

    @Override
    public 
 Q innerJoin(EntityPath
 target, Path
 alias) {
        return queryMixin.innerJoin(target, alias);
    }

    @Override
    public 
 Q innerJoin(MapExpression target) {
        return queryMixin.innerJoin(target);
    }

    @Override
    public 
 Q innerJoin(MapExpression target, Path
 alias) {
        return queryMixin.innerJoin(target, alias);
    }

    @Override
    public 
 Q join(CollectionExpression target) {
        return queryMixin.join(target);
    }

    @Override
    public 
 Q join(CollectionExpression target, Path
 alias) {
        return queryMixin.join(target, alias);
    }

    @Override
    public 
 Q join(EntityPath
 target) {
        return queryMixin.join(target);
    }

    @Override
    public 
 Q join(EntityPath
 target, Path
 alias) {
        return queryMixin.join(target, alias);
    }

    @Override
    public 
 Q join(MapExpression target) {
        return queryMixin.join(target);
    }

    @Override
    public 
 Q join(MapExpression target, Path
 alias) {
        return queryMixin.join(target, alias);
    }

    @Override
    public 
 Q leftJoin(CollectionExpression target) {
        return queryMixin.leftJoin(target);
    }

    @Override
    public 
 Q leftJoin(CollectionExpression target, Path
 alias) {
        return queryMixin.leftJoin(target, alias);
    }

    @Override
    public 
 Q leftJoin(EntityPath
 target) {
        return queryMixin.leftJoin(target);
    }

    @Override
    public 
 Q leftJoin(EntityPath
 target, Path
 alias) {
        return queryMixin.leftJoin(target, alias);
    }

    @Override
    public 
 Q leftJoin(MapExpression target) {
        return queryMixin.leftJoin(target);
    }

    @Override
    public 
 Q leftJoin(MapExpression target, Path
 alias) {
        return queryMixin.leftJoin(target, alias);
    }

    @Override
    public 
 Q rightJoin(CollectionExpression target) {
        return queryMixin.rightJoin(target);
    }

    @Override
    public 
 Q rightJoin(CollectionExpression target, Path
 alias) {
        return queryMixin.rightJoin(target, alias);
    }

    @Override
    public 
 Q rightJoin(EntityPath
 target) {
        return queryMixin.rightJoin(target);
    }

    @Override
    public 
 Q rightJoin(EntityPath
 target, Path
 alias) {
        return queryMixin.rightJoin(target, alias);
    }

    @Override
    public 
 Q rightJoin(MapExpression target) {
        return queryMixin.rightJoin(target);
    }

    @Override
    public 
 Q rightJoin(MapExpression target, Path alias) {
        return queryMixin.rightJoin(target, alias);
    }

    public Q on(Predicate condition) {
        return queryMixin.on(condition);
    }

    @Override
    public Q on(Predicate... conditions) {
        return queryMixin.on(conditions);
    }

    @Override
    @Deprecated
    public Q limit(long l) {
        throw new UnsupportedOperationException("JPQL doesn't support limit on subqueries");
    }

    @Override
    @Deprecated
    public Q offset(long o) {
        throw new UnsupportedOperationException("JPQL doesn't support offset on subqueries");
    }

    @Override
    @Deprecated
    public Q orderBy(OrderSpecifier o) {
        throw new UnsupportedOperationException("JPQL doesn't support order by on subqueries");
    }

    @Override
    @Deprecated
    public Q orderBy(OrderSpecifier... o) {
        throw new UnsupportedOperationException("JPQL doesn't support order by on subqueries");
    }

    @Override
    public String toString() {
        if (!queryMixin.getMetadata().getJoins().isEmpty()) {
            JPQLSerializer serializer = new JPQLSerializer(JPQLTemplates.DEFAULT, null);
            serializer.setStrict(false);
            serializer.serialize(queryMixin.getMetadata(), false, null);
            return serializer.toString().trim();
        } else {
            return super.toString();
        }
    }

}