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/*
 * Copyright 2015 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.way.sql.compiler;

import java.util.List;
import java.util.Set;

import br.com.objectos.way.code.AnnotationInfo;
import br.com.objectos.way.code.AnnotationInfoEnclosingTypeInfo;
import br.com.objectos.way.code.ClassInfo;
import br.com.objectos.way.code.SimpleTypeInfo;
import br.com.objectos.way.core.tmpl.mustache.IsMustacheSerializable;
import br.com.objectos.way.core.tmpl.mustache.MustacheObject;
import br.com.objectos.way.core.tmpl.mustache.Mustaches;
import br.com.objectos.way.core.util.WayIterables;

import com.google.common.base.Function;

/**
 * @author [email protected] (Marcio Endo)
 */
class PkSql implements IsMustacheSerializable {

  private final List columnList;

  private PkSql(List columnList) {
    this.columnList = columnList;
  }

  public static PkSql of(ClassInfo classInfo) {
    List columnList = SqlColumn.columnListOf(classInfo);
    return new PkSql(columnList);
  }

  @Override
  public MustacheObject toMustache() {
    return Mustaches.toMustacheHelper()
        .add("columns", columnList)
        .add("tables", tables())
        .toMustache();
  }

  private Set tables() {
    return WayIterables.from(columnList)
        .transform(new Function() {
          @Override
          public AnnotationInfo apply(SqlColumn input) {
            return input.getAnnotationInfo();
          }
        })
        .transform(AnnotationInfoEnclosingTypeInfo.get())
        .presentInstancesOf(SimpleTypeInfo.class)
        .toImmutableSet();
  }

}