/*
 * 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.facebook.presto.sql.planner.iterative.rule;

import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.sql.parser.SqlParser;
import com.facebook.presto.sql.planner.DesugarAtTimeZoneRewriter;
import com.facebook.presto.sql.planner.iterative.Rule;
import com.facebook.presto.sql.planner.iterative.RuleSet;
import com.facebook.presto.sql.planner.iterative.rule.ExpressionRewriteRuleSet.AggregationExpressionRewrite;
import com.facebook.presto.sql.planner.iterative.rule.ExpressionRewriteRuleSet.FilterExpressionRewrite;
import com.facebook.presto.sql.planner.iterative.rule.ExpressionRewriteRuleSet.JoinExpressionRewrite;
import com.facebook.presto.sql.planner.iterative.rule.ExpressionRewriteRuleSet.ProjectExpressionRewrite;
import com.facebook.presto.sql.planner.iterative.rule.ExpressionRewriteRuleSet.TableScanExpressionRewrite;
import com.facebook.presto.sql.planner.iterative.rule.ExpressionRewriteRuleSet.ValuesExpressionRewrite;
import com.facebook.presto.sql.tree.Expression;
import com.google.common.collect.ImmutableSet;

import java.util.Set;

public class DesugarAtTimeZone
        implements RuleSet
{
    private final Metadata metadata;
    private final SqlParser sqlParser;

    private Set<Rule<?>> rules = ImmutableSet.of(
            new ProjectExpressionRewrite(this::rewrite),
            new AggregationExpressionRewrite(this::rewrite),
            new FilterExpressionRewrite(this::rewrite),
            new TableScanExpressionRewrite(this::rewrite),
            new JoinExpressionRewrite(this::rewrite),
            new ValuesExpressionRewrite(this::rewrite));

    public DesugarAtTimeZone(Metadata metadata, SqlParser sqlParser)
    {
        this.metadata = metadata;
        this.sqlParser = sqlParser;
    }

    @Override
    public Set<Rule<?>> rules()
    {
        return rules;
    }

    private Expression rewrite(Expression expression, Rule.Context context)
    {
        return DesugarAtTimeZoneRewriter.rewrite(expression, context.getSession(), metadata, sqlParser, context.getSymbolAllocator());
    }
}
