package org.shedlang.compiler.sourcefiles;

import org.junit.jupiter.api.Test;
import org.shedlang.compiler.types.NamespaceName;

import java.io.IOException;
import java.nio.file.Files;

import static org.shedlang.compiler.TemporaryFiles.createTemporaryTestDirectory;
import static org.zwobble.precisely.AssertThat.assertThat;
import static org.zwobble.precisely.Matchers.*;

public class SourceFilesTests {
    @Test
    public void whenDirectoryIsEmptyThenNoSourceFilesAreFound() throws IOException {
        var sourceDirectory = createTemporaryTestDirectory("SourceFilesTests");

        var sourceFiles = SourceFiles.collectSourceFiles(sourceDirectory);

        assertThat(sourceFiles, containsExactly());
    }

    @Test
    public void whenDirectoryContainsFileWithShedExtensionThenSourceFileIsFound() throws IOException {
        var sourceDirectory = createTemporaryTestDirectory("SourceFilesTests");
        Files.createFile(sourceDirectory.resolve("One.shed"));

        var sourceFiles = SourceFiles.collectSourceFiles(sourceDirectory);

        assertThat(sourceFiles, containsExactly(
            allOf(
                has("path", x -> x.path(), equalTo(sourceDirectory.resolve("One.shed"))),
                has("namespaceName", x -> x.namespaceName(), equalTo(NamespaceName.of("One")))
            )
        ));
    }

    @Test
    public void whenDirectoryContainsFileWithNonShedExtensionThenNoSourceFileIsFound() throws IOException {
        var sourceDirectory = createTemporaryTestDirectory("SourceFilesTests");
        Files.createFile(sourceDirectory.resolve("One.she"));

        var sourceFiles = SourceFiles.collectSourceFiles(sourceDirectory);

        assertThat(sourceFiles, containsExactly());
    }

    @Test
    public void whenFileHasMultipleThenExtensionsThenFileIsNotTreatedAsSourceFile() throws IOException {
        var sourceDirectory = createTemporaryTestDirectory("SourceFilesTests");
        Files.createFile(sourceDirectory.resolve("One.Two.shed"));

        var sourceFiles = SourceFiles.collectSourceFiles(sourceDirectory);

        assertThat(sourceFiles, containsExactly());
    }
}