// Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.android.tools.r8;

import static com.android.tools.r8.DiagnosticsMatcher.diagnosticMessage;
import static org.hamcrest.CoreMatchers.not;
import static org.junit.Assert.assertEquals;

import com.android.tools.r8.diagnosticinspector.DiagnosticSubject;
import com.android.tools.r8.diagnosticinspector.FoundDiagnosticSubject;
import com.android.tools.r8.utils.ThrowingConsumer;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.hamcrest.Matcher;

public abstract class TestDiagnosticMessages {

  public <E extends Exception> TestDiagnosticMessages applyIf(
      boolean condition,
      ThrowingConsumer<TestDiagnosticMessages, E> thenConsumer,
      ThrowingConsumer<TestDiagnosticMessages, E> elseConsumer)
      throws E {
    if (condition) {
      thenConsumer.accept(this);
    } else {
      elseConsumer.accept(this);
    }
    return this;
  }

  public abstract List<Diagnostic> getInfos();

  public abstract List<Diagnostic> getWarnings();

  public final TestDiagnosticMessages inspectWarning(
      int index, ThrowableConsumer<DiagnosticSubject> consumer) {
    consumer.acceptWithRuntimeException(new FoundDiagnosticSubject<>(getWarnings().get(index)));
    return this;
  }

  @SafeVarargs
  @SuppressWarnings("unchecked")
  public final TestDiagnosticMessages inspectWarnings(
      ThrowableConsumer<DiagnosticSubject>... consumers) {
    return inspectWarnings(Arrays.asList(consumers));
  }

  public final TestDiagnosticMessages inspectWarnings(
      Collection<ThrowableConsumer<DiagnosticSubject>> consumers) {
    assertEquals(consumers.size(), getWarnings().size());
    Iterator<ThrowableConsumer<DiagnosticSubject>> consumerIterator = consumers.iterator();
    Iterator<Diagnostic> warningIterator = getWarnings().iterator();
    for (int i = 0; i < consumers.size(); i++) {
      consumerIterator
          .next()
          .acceptWithRuntimeException(new FoundDiagnosticSubject<>(warningIterator.next()));
    }
    return this;
  }

  public abstract List<Diagnostic> getErrors();

  @SafeVarargs
  @SuppressWarnings("unchecked")
  public final TestDiagnosticMessages inspectErrors(
      ThrowableConsumer<DiagnosticSubject>... consumers) {
    return inspectErrors(Arrays.asList(consumers));
  }

  public final TestDiagnosticMessages inspectErrors(
      Collection<ThrowableConsumer<DiagnosticSubject>> consumers) {
    assertEquals(consumers.size(), getErrors().size());
    Iterator<ThrowableConsumer<DiagnosticSubject>> consumerIterator = consumers.iterator();
    Iterator<Diagnostic> errorIterator = getErrors().iterator();
    for (int i = 0; i < consumers.size(); i++) {
      consumerIterator
          .next()
          .acceptWithRuntimeException(new FoundDiagnosticSubject<>(errorIterator.next()));
    }
    return this;
  }

  public abstract TestDiagnosticMessages assertNoMessages();

  public abstract TestDiagnosticMessages assertHasWarnings();

  public abstract TestDiagnosticMessages assertOnlyInfos();

  public abstract TestDiagnosticMessages assertOnlyWarnings();

  public abstract TestDiagnosticMessages assertOnlyErrors();

  public abstract TestDiagnosticMessages assertInfosCount(int count);

  public abstract TestDiagnosticMessages assertWarningsCount(int count);

  public abstract TestDiagnosticMessages assertErrorsCount(int count);

  public final TestDiagnosticMessages assertNoInfos() {
    return assertInfosMatch(Collections.emptyList());
  }

  public final TestDiagnosticMessages assertNoWarnings() {
    return assertWarningsMatch(Collections.emptyList());
  }

  public final TestDiagnosticMessages assertNoErrors() {
    return assertErrorsMatch(Collections.emptyList());
  }

  // Match exact.

  public final TestDiagnosticMessages assertDiagnosticsMatch(Matcher<Diagnostic> matcher) {
    return assertDiagnosticsMatch(Collections.singletonList(matcher));
  }

  public abstract TestDiagnosticMessages assertDiagnosticsMatch(
      Collection<Matcher<Diagnostic>> matchers);

  public final TestDiagnosticMessages assertInfosMatch(Matcher<Diagnostic> matcher) {
    return assertInfosMatch(Collections.singletonList(matcher));
  }

  @SafeVarargs
  public final TestDiagnosticMessages assertInfosMatch(Matcher<Diagnostic>... matchers) {
    return assertInfosMatch(Arrays.asList(matchers));
  }

  public abstract TestDiagnosticMessages assertInfosMatch(Collection<Matcher<Diagnostic>> matchers);

  public final TestDiagnosticMessages assertWarningsMatch(Matcher<Diagnostic> matcher) {
    return assertWarningsMatch(Collections.singletonList(matcher));
  }

  @SafeVarargs
  public final TestDiagnosticMessages assertWarningsMatch(Matcher<Diagnostic>... matchers) {
    return assertWarningsMatch(Arrays.asList(matchers));
  }

  public abstract TestDiagnosticMessages assertWarningsMatch(
      Collection<Matcher<Diagnostic>> matchers);

  @SafeVarargs
  public final TestDiagnosticMessages assertErrorsMatch(Matcher<Diagnostic>... matchers) {
    return assertErrorsMatch(Arrays.asList(matchers));
  }

  public abstract TestDiagnosticMessages assertErrorsMatch(
      Collection<Matcher<Diagnostic>> matchers);

  // Match one.

  public abstract TestDiagnosticMessages assertDiagnosticThatMatches(Matcher<Diagnostic> matcher);

  public abstract TestDiagnosticMessages assertInfoThatMatches(Matcher<Diagnostic> matcher);

  public abstract TestDiagnosticMessages assertWarningThatMatches(Matcher<Diagnostic> matcher);

  public abstract TestDiagnosticMessages assertErrorThatMatches(Matcher<Diagnostic> matcher);

  // Consider removing this helper.
  public final TestDiagnosticMessages assertWarningMessageThatMatches(Matcher<String> matcher) {
    return assertWarningThatMatches(diagnosticMessage(matcher));
  }

  // Consider removing this helper.
  public final TestDiagnosticMessages assertErrorMessageThatMatches(Matcher<String> matcher) {
    return assertErrorThatMatches(diagnosticMessage(matcher));
  }

  // Match all.

  public abstract TestDiagnosticMessages assertAllDiagnosticsMatch(Matcher<Diagnostic> matcher);

  public abstract TestDiagnosticMessages assertAllInfosMatch(Matcher<Diagnostic> matcher);

  public abstract TestDiagnosticMessages assertAllWarningsMatch(Matcher<Diagnostic> matcher);

  public abstract TestDiagnosticMessages assertAllErrorsMatch(Matcher<Diagnostic> matcher);

  // Match none.

  public final TestDiagnosticMessages assertNoDiagnosticsMatch(Matcher<Diagnostic> matcher) {
    return assertAllDiagnosticsMatch(not(matcher));
  }

  public final TestDiagnosticMessages assertNoInfosMatch(Matcher<Diagnostic> matcher) {
    return assertAllInfosMatch(not(matcher));
  }

  public final TestDiagnosticMessages assertNoWarningsMatch(Matcher<Diagnostic> matcher) {
    return assertAllWarningsMatch(not(matcher));
  }

  public final TestDiagnosticMessages assertNoErrorsMatch(Matcher<Diagnostic> matcher) {
    return assertAllErrorsMatch(not(matcher));
  }
}