/*
 * Copyright 2015 Google Inc.
 *
 * 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.google.template.soy.jbcsrc.api;

import com.google.common.base.Optional;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.inject.AbstractModule;
import com.google.inject.Key;
import com.google.inject.Provides;
import com.google.inject.Singleton;
import com.google.inject.multibindings.OptionalBinder;
import com.google.template.soy.jbcsrc.shared.CompiledTemplates;
import com.google.template.soy.shared.internal.SharedModule;
import com.google.template.soy.shared.restricted.SoyFunction;
import com.google.template.soy.shared.restricted.SoyPrintDirective;

/**
 * A module for accessing a precompiled {@link SoySauce} object.
 *
 * <p>Optionally consumes a key for a {@code @Deltemplates ImmutableSet<String>} which defines the
 * full set of deltemplates that should be rendered.
 *
 * <p>Can be installed multiple times.
 */
public final class PrecompiledSoyModule extends AbstractModule {
  @Override
  protected void configure() {
    // This installs all the core plugins and the apicallscope dependencies.
    install(new SharedModule());
    OptionalBinder.newOptionalBinder(
        binder(), new Key<ImmutableSet<String>>(Deltemplates.class) {});
  }

  @Provides
  @Singleton
  @Precompiled
  SoySauce provideSoySauce(
      SoySauceImpl.Factory factory,
      @Deltemplates Optional<ImmutableSet<String>> allDeltemplates,
      ImmutableMap<String, ? extends SoyFunction> functions,
      ImmutableMap<String, ? extends SoyPrintDirective> printDirectives) {
    return factory.create(
        new CompiledTemplates(allDeltemplates.or(ImmutableSet.<String>of())),
        functions,
        printDirectives);
  }

  @Override
  public boolean equals(Object obj) {
    return obj instanceof PrecompiledSoyModule;
  }

  @Override
  public int hashCode() {
    return PrecompiledSoyModule.class.hashCode();
  }
}