/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package sonia.scm.net.ahc;

import com.google.common.collect.Lists;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.ArgumentCaptor;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.verify;

/**
 * @author Sebastian Sdorra
 */
@ExtendWith(MockitoExtension.class)
class FormContentBuilderTest {

  @Mock
  private AdvancedHttpRequestWithBody request;

  private FormContentBuilder builder;

  @Nested
  class Default {

    @BeforeEach
    void setUpObjectUnderTest() {
      // required because InjectMocks uses the wrong constructor
      builder = new FormContentBuilder(request);
    }

    @Test
    void shouldEncodeFieldValues() {
      builder.field("a", "ü", "ä", "ö").build();
      assertUrlEncodedContent("a=%C3%BC&a=%C3%A4&a=%C3%B6");
    }

    @Test
    void shouldApplySimpleUrlEncoded() {
      builder.field("a", "b").build();

      assertUrlEncodedContent("a=b");

      verify(request).contentType("application/x-www-form-urlencoded");
    }

    @Test
    void shouldUseMultipartFormData() throws IOException {
      builder.file("file", "test.txt", stream("hello"));
      buildMultipart();

      ArgumentCaptor<String> captor = ArgumentCaptor.forClass(String.class);
      verify(request).contentType(captor.capture());

      assertThat(captor.getValue()).startsWith("multipart/form-data; boundary=");
    }

    @Test
    void shouldCreateValuesFromVarargs() {
      builder.field("a", "b").field("c", "d", "e").build();
      assertUrlEncodedContent("a=b&c=d&c=e");
    }

    @Test
    void shouldCreateValuesFromIterables() {
      Iterable<Object> i1 = Lists.newArrayList("b");
      builder.fields("a", i1)
        .fields("c", Lists.newArrayList("d", "e"))
        .build();
      assertUrlEncodedContent("a=b&c=d&c=e");
    }

  }

  @Nested
  class WithBoundary {

    @BeforeEach
    void setUpObjectUnderTest() {
      // required because InjectMocks uses the wrong constructor
      builder = new FormContentBuilder(request, () -> "boundary");
    }

    @Test
    void shouldAppendBoundaryToContentType() throws IOException {
      builder.file("file", "test.txt", stream("hello"));
      buildMultipart();

      ArgumentCaptor<String> captor = ArgumentCaptor.forClass(String.class);
      verify(request).contentType(captor.capture());

      assertThat(captor.getValue()).startsWith("multipart/form-data; boundary=boundary");
    }

    @Test
    void shouldSendMultipartContent() throws IOException {
      builder.field("title", "Readme");
      builder.file("content", "README.md", stream("# hello"));

      String expected = String.join(System.lineSeparator(),
        "--boundary",
        "Content-Disposition: form-data; name=\"title\"",
        "",
        "Readme",
        "--boundary",
        "Content-Disposition: form-data; name=\"content\"; filename=\"README.md\"",
        "Content-Transfer-Encoding: binary",
        "",
        "# hello",
        "--boundary",
        ""
      );

      assertThat(buildMultipart()).isEqualTo(expected);
    }

  }

  private InputStream stream(String content) {
    return new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
  }


  private void assertUrlEncodedContent(String content) {
    ArgumentCaptor<String> captor = ArgumentCaptor.forClass(String.class);
    verify(request).stringContent(captor.capture());
    assertThat(captor.getValue()).isEqualTo(content);
  }

  private String buildMultipart() throws IOException {
    builder.build();

    ArgumentCaptor<Content> contentCaptor = ArgumentCaptor.forClass(Content.class);
    verify(request).content(contentCaptor.capture());

    Content content = contentCaptor.getValue();
    content.prepare(request);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    content.process(baos);

    return baos.toString();
  }

}
