package indexing;

import com.github.javaparser.JavaParser;

import com.github.javaparser.ParserConfiguration;

import com.github.javaparser.ast.CompilationUnit;

import options.OdinOptions;

import java.io.IOException;

import java.nio.file.Path;

import java.util.Collection;

public class Indexer {

    private final OdinOptions odinOptions;

    public Indexer(

            OdinOptions odinOptions

    ) {

        this.odinOptions = odinOptions;

    }

    public void indexFiles(

            String inputDirectory,

            Collection<Path> paths,

            Index index

    ) {

        for (Path path: paths) {

            try {

                indexFile(inputDirectory, index, path);

            } catch (Exception e) {

                throw new RuntimeException("Error processing " + path, e);

            }

        }

    }

    private String getFileUrl(

            String inputSourceDirectory,

            Path javaSourceFile

    ) {

        return odinOptions.webPathToSourceHtmlFiles

                + (

                javaSourceFile.toString()

                        .replace('\\', '/')

                        .substring(0, javaSourceFile.toString().length()-5)

                        .replace(inputSourceDirectory, "")

                        + ".html"

        );

    }

    private void indexFile(

            String inputDirectory,

            Index index,

            Path path

    ) throws IOException {

        System.out.println("Indexing " + path);

        final String fileUrl = getFileUrl(inputDirectory, path);

        indexFile(

                index,

                path,

                fileUrl,

                odinOptions.languageLevel

        );

    }

    private void indexFile(

            Index index,

            Path inputFile,

            String fileUrl,

            ParserConfiguration.LanguageLevel languageLevel

    ) throws IOException {

        JavaParser javaParser = new JavaParser(new ParserConfiguration().setLanguageLevel(

                languageLevel));

        CompilationUnit compilationUnit = javaParser.parse(inputFile).getResult().get();

        IndexVisitor indexVisitor = new IndexVisitor(index, fileUrl);

        indexVisitor.visit(compilationUnit, null);

    }

}