/*
    * SPDX-License-Identifier: Apache-2.0
    * See LICENSE file for details.
    *
    * Copyright 2012-2026 Hazendaz
    */
   package net.jangaroo.smartsprites.maven;
   
   import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.List;
  
  import org.apache.maven.api.plugin.testing.InjectMojo;
  import org.apache.maven.api.plugin.testing.MojoExtension;
  import org.apache.maven.api.plugin.testing.MojoParameter;
  import org.apache.maven.api.plugin.testing.MojoTest;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.io.TempDir;
  
  /**
   * Unit tests for {@link SmartSpritesMojo} using the Maven Plugin Testing Harness 3.5.1 (JUnit 5).
   */
  @MojoTest
  class SmartSpritesMojoTest {
  
      /**
       * When {@code skip=true} the mojo must return without executing any processing.
       *
       * @param mojo
       *            the mojo
       */
      @Test
      @InjectMojo(goal = "smartsprites")
      @MojoParameter(name = "skip", value = "true")
      void testSkipExecution(SmartSpritesMojo mojo) {
          assertDoesNotThrow(mojo::execute);
      }
  
      /**
       * An unrecognised log level must cause a {@link MojoExecutionException}.
       *
       * @param mojo
       *            the mojo
       */
      @Test
      @InjectMojo(goal = "smartsprites")
      @MojoParameter(name = "logLevel", value = "INVALID_LEVEL")
      void testInvalidLogLevelThrowsException(SmartSpritesMojo mojo) {
          assertThrows(MojoExecutionException.class, mojo::execute);
      }
  
      /**
       * An unrecognised PNG depth value must cause a {@link MojoExecutionException}.
       *
       * @param mojo
       *            the mojo
       */
      @Test
      @InjectMojo(goal = "smartsprites")
      @MojoParameter(name = "spritePngDepth", value = "INVALID_DEPTH")
      void testInvalidSpritePngDepthThrowsException(SmartSpritesMojo mojo) {
          assertThrows(MojoExecutionException.class, mojo::execute);
      }
  
      /**
       * An unrecognised working mode must cause a {@link MojoExecutionException}.
       *
       * @param mojo
       *            the mojo
       */
      @Test
      @InjectMojo(goal = "smartsprites")
      @MojoParameter(name = "workingMode", value = "invalidMode")
      void testInvalidWorkingModeThrowsException(SmartSpritesMojo mojo) {
          assertThrows(MojoExecutionException.class, mojo::execute);
      }
  
      /**
       * Using rootDirMode with a rootDirPath that does not exist must cause a {@link MojoExecutionException}.
       *
       * @param mojo
       *            the mojo
       *
       * @throws IllegalAccessException
       *             the illegal access exception
       */
      @Test
      @InjectMojo(goal = "smartsprites")
      void testRootDirPathDoesNotExistThrowsException(SmartSpritesMojo mojo) throws IllegalAccessException {
          MojoExtension.setVariableValueToObject(mojo, "rootDirPath", Path.of("/non/existent/directory/path").toFile());
          assertThrows(MojoExecutionException.class, mojo::execute);
      }
  
     /**
      * Using rootDirMode with an empty directory must complete successfully without processing any sprites.
      *
      * @param mojo
      *            the mojo
      * @param tempDir
      *            the temp dir
      *
      * @throws IllegalAccessException
      *             the illegal access exception
      */
     @Test
     @InjectMojo(goal = "smartsprites")
     void testRootDirModeSucceedsWithEmptyDirectory(SmartSpritesMojo mojo, @TempDir Path tempDir)
             throws IllegalAccessException {
         MojoExtension.setVariableValueToObject(mojo, "rootDirPath", tempDir.toFile());
         MojoExtension.setVariableValueToObject(mojo, "outputDirPath", tempDir.resolve("output").toFile());
         assertDoesNotThrow(mojo::execute);
     }
 
     /**
      * Using cssFilesMode with an empty cssFiles list should succeed without processing.
      *
      * @param mojo
      *            the mojo
      *
      * @throws IllegalAccessException
      *             the illegal access exception
      */
     @Test
     @InjectMojo(goal = "smartsprites")
     @MojoParameter(name = "workingMode", value = "cssFilesMode")
     void testCssFilesModeWithEmptyFilesListSucceeds(SmartSpritesMojo mojo) throws IllegalAccessException {
         MojoExtension.setVariableValueToObject(mojo, "cssFiles", List.of());
         assertDoesNotThrow(mojo::execute);
     }
 
     /**
      * Using cssFilesMode with a missing CSS file must fail.
      *
      * @param mojo
      *            the mojo
      *
      * @throws IllegalAccessException
      *             the illegal access exception
      */
     @Test
     @InjectMojo(goal = "smartsprites")
     void testCssFilesModeWithMissingCssFileThrowsException(SmartSpritesMojo mojo) throws IllegalAccessException {
         MojoExtension.setVariableValueToObject(mojo, "workingMode", "cssFilesMode");
         MojoExtension.setVariableValueToObject(mojo, "cssFiles", List.of(Path.of("/non/existent.css").toFile()));
         assertThrows(MojoExecutionException.class, mojo::execute);
     }
 
     /**
      * Using cssFilesWithOutputDirMode without required configuration must fail.
      *
      * @param mojo
      *            the mojo
      *
      * @throws IllegalAccessException
      *             the illegal access exception
      */
     @Test
     @InjectMojo(goal = "smartsprites")
     void testCssFilesWithOutputDirModeWithoutRequiredValuesThrowsException(SmartSpritesMojo mojo)
             throws IllegalAccessException {
         MojoExtension.setVariableValueToObject(mojo, "workingMode", "cssFilesWithOutputDirMode");
         MojoExtension.setVariableValueToObject(mojo, "cssFiles", List.of());
         MojoExtension.setVariableValueToObject(mojo, "rootDirPath", null);
         assertThrows(MojoExecutionException.class, mojo::execute);
     }
 
     /**
      * rootDirMode with an explicit null rootDirPath must fail.
      *
      * @param mojo
      *            the mojo
      *
      * @throws IllegalAccessException
      *             the illegal access exception
      */
     @Test
     @InjectMojo(goal = "smartsprites")
     void testRootDirModeWithNullRootDirPathThrowsException(SmartSpritesMojo mojo) throws IllegalAccessException {
         MojoExtension.setVariableValueToObject(mojo, "rootDirPath", null);
         assertThrows(MojoExecutionException.class, mojo::execute);
     }
 
     /**
      * cssFilesMode with a real CSS file and documentRootDirPath set should succeed.
      *
      * @param mojo
      *            the mojo
      * @param tempDir
      *            the temp dir
      *
      * @throws IllegalAccessException
      *             the illegal access exception
      * @throws IOException
      *             the io exception
      */
     @Test
     @InjectMojo(goal = "smartsprites")
     void testCssFilesModeSucceedsWithExistingCssFileAndDocumentRoot(SmartSpritesMojo mojo, @TempDir Path tempDir)
             throws IllegalAccessException, IOException {
         Path cssFile = tempDir.resolve("style.css");
         Files.writeString(cssFile, ".sample{color:black;}", StandardCharsets.UTF_8);
 
         MojoExtension.setVariableValueToObject(mojo, "workingMode", "cssFilesMode");
         MojoExtension.setVariableValueToObject(mojo, "cssFiles", List.of(cssFile.toFile()));
         MojoExtension.setVariableValueToObject(mojo, "documentRootDirPath", tempDir.toFile());
 
         assertDoesNotThrow(mojo::execute);
     }
 }