package lombok.bytecode;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import lombok.core.LombokApp;

import org.mangosdk.spi.ProviderFor;

import com.zwitserloot.cmdreader.CmdReader;
import com.zwitserloot.cmdreader.Description;
import com.zwitserloot.cmdreader.InvalidCommandLineException;
import com.zwitserloot.cmdreader.Mandatory;
import com.zwitserloot.cmdreader.Sequential;
import com.zwitserloot.cmdreader.Shorthand;

@ProviderFor(LombokApp.class)
public class PoolConstantsApp extends LombokApp {
	
	@Override public String getAppName() {
		return "Xprintpool";
	}
	
	@Override public List<String> getAppAliases() {
		return Arrays.asList("Xprintpool");
	}
	
	@Override public String getAppDescription() {
		return "Prints the content of the constant pool to standard out.";
	}
	
	@Override public boolean isDebugTool() {
		return true;
	}
	
	public static class CmdArgs {
		@Sequential
		@Mandatory
		@Description("paths to class files to be printed. If a directory is named, all files (recursively) in that directory will be printed.")
		private List<String> classFiles = new ArrayList<String>();
		
		@Shorthand({"h", "?"})
		@Description("Shows this help text")
		boolean help = false;
	}
	
	@Override public int runApp(List<String> raw) throws Exception {
		CmdReader<CmdArgs> reader = CmdReader.of(CmdArgs.class);
		CmdArgs args;
		try {
			args = reader.make(raw.toArray(new String[0]));
			if (args.help) {
				System.out.println(reader.generateCommandLineHelp("java -jar lombok.jar -printpool"));
				return 0;
			}
		} catch (InvalidCommandLineException e) {
			System.err.println(e.getMessage());
			System.err.println(reader.generateCommandLineHelp("java -jar lombok.jar -printpool"));
			return 1;
		}
		
		List<File> filesToProcess = PostCompilerApp.cmdArgsToFiles(args.classFiles);
		int filesVisited = 0;
		boolean moreThanOne = filesToProcess.size() > 1;
		for (File file : filesToProcess) {
			if (!file.exists() || !file.isFile()) {
				System.out.printf("Cannot find file '%s'\n", file.getAbsolutePath());
				continue;
			}
			filesVisited++;
			if (moreThanOne) System.out.printf("Processing '%s'\n", file.getAbsolutePath());
			System.out.println(new ClassFileMetaData(PostCompilerApp.readFile(file)).poolContent());
		}
		
		if (moreThanOne) System.out.printf("Total files visited: %d\n", filesVisited);
		
		return filesVisited == 0 ? 1 : 0;
	}
}