/*
 * Copyright 2018 The Bazel Authors. All rights reserved.
 *
 * 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 io.bazel.kotlin.builder;

import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableSet;
import io.bazel.kotlin.builder.utils.BazelRunFiles;

import java.util.Optional;
import java.util.Set;
import java.util.stream.Stream;

@SuppressWarnings({"WeakerAccess", "unused"})
@AutoValue
public abstract class Dep {
  public abstract String label();

  public abstract String moduleName();

  public abstract Set<String> runtimeDeps();

  public abstract Set<String> compileJars();

  public static Builder builder() {
    return new AutoValue_Dep.Builder().runtimeDeps(ImmutableSet.of());
  }

  @SuppressWarnings("UnusedReturnValue")
  @AutoValue.Builder
  public abstract static class Builder {
    public abstract Builder compileJars(Set<String> compileJars);

    public abstract Builder label(String label);

    public abstract Builder runtimeDeps(Set<String> runtimeDeps);

    public abstract Builder moduleName(String moduleName);

    abstract String label();

    abstract Optional<String> moduleName();

    abstract Dep autoBuild();

    public Dep build() {
      if (!moduleName().isPresent()) {
        moduleName(label());
      }
      return autoBuild();
    }
  }

  /** Collect all of the compile jars of all the dependencies. */
  public static Stream<String> classpathOf(Dep... dependencies) {
    return Stream.of(dependencies).flatMap(it -> it.compileJars().stream());
  }

  /** Import a single dep. Similar to a `kt_jvm_import` or a `kt_js_import`. */
  public static Dep importJar(String label, String compileJar) {
    return Dep.builder()
        .label(label)
        .compileJars(ImmutableSet.of(BazelRunFiles.resolveVerified(compileJar).getAbsolutePath()))
        .build();
  }
}