/*
 * Copyright 2016 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 com.google.idea.blaze.base.lang.buildfile.completion;

import com.google.common.base.Joiner;
import com.google.idea.blaze.base.lang.buildfile.BuildFileIntegrationTestCase;
import com.intellij.psi.PsiFile;

import static com.google.common.truth.Truth.assertThat;

/**
 * Tests code completion works with general symbols in scope.
 */
public class LocalSymbolCompletionTest extends BuildFileIntegrationTestCase {

  private PsiFile setInput(String... fileContents) {
    return testFixture.configureByText("BUILD", Joiner.on("\n").join(fileContents));
  }

  private void assertResult(String... resultingFileContents) {
    String s = testFixture.getFile().getText();
    testFixture.checkResult(Joiner.on("\n").join(resultingFileContents));
  }

  public void testLocalVariable() {
    setInput(
      "var = [a, b]",
      "def function(name, deps, srcs):",
      "  v<caret>"
    );

    completeIfUnique();

    assertResult(
      "var = [a, b]",
      "def function(name, deps, srcs):",
      "  var<caret>"
    );
  }

  public void testLocalFunction() {
    setInput(
      "def fnName():return True",
      "def function(name, deps, srcs):",
      "  fnN<caret>"
    );

    completeIfUnique();

    assertResult(
      "def fnName():return True",
      "def function(name, deps, srcs):",
      "  fnName<caret>"
    );
  }

  public void testNoCompletionAfterDot() {
    setInput(
      "var = [a, b]",
      "def function(name, deps, srcs):",
      "  ext.v<caret>"
    );

    String[] completionItems = getCompletionItemsAsStrings();
    assertThat(completionItems).isEmpty();
  }

  public void testFunctionParam() {
    setInput(
      "def test(var):",
      "  v<caret>"
    );

    completeIfUnique();

    assertResult(
      "def test(var):",
      "  var<caret>"
    );
  }

  // b/28912523: when symbol is present in multiple assignment statements, should only be
  // included once in the code-completion dialog
  public void testSymbolAssignedMultipleTimes() {
    setInput(
      "var = 1",
      "var = 2",
      "var = 3",
      "<caret>"
    );

    completeIfUnique();

    assertResult(
      "var = 1",
      "var = 2",
      "var = 3",
      "var<caret>"
    );
  }

  public void testSymbolDefinedOutsideScope() {
    setInput(
      "<caret>",
      "var = 1"
    );

    assertThat(getCompletionItemsAsStrings()).isEmpty();
  }

  public void testSymbolDefinedOutsideScope2() {
    setInput(
      "def fn():",
      "  var = 1",
      "v<caret>"
    );

    assertThat(testFixture.completeBasic()).isEmpty();
  }

  public void testSymbolDefinedOutsideScope3() {
    setInput(
      "for var in (1, 2, 3): print var",
      "v<caret>"
    );

    assertThat(testFixture.completeBasic()).isEmpty();
  }

}