package eu.m724.blog;

import org.apache.commons.cli.*;

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

public class Main {
    public static void main(String[] args) throws IOException {
        System.out.println("Hello world!");

        var commandLine = getCommandLine(args);

        if (commandLine == null)
            System.exit(2);

        args = commandLine.getArgs();

        var workingDirectory = Path.of(args[0]);
        var templateDirectory = Path.of(commandLine.getOptionValue("output-dir", workingDirectory.resolve("template").toString()));
        var outputDirectory = Path.of(commandLine.getOptionValue("output-dir", workingDirectory.resolve("generated_out").toString()));
        var force = commandLine.hasOption("force");

        var startServer = commandLine.hasOption("server");
        var openBrowser = !commandLine.hasOption("no-browser");
        var renderDrafts = commandLine.hasOption("draft") || startServer;


        /* Build process */

        var start = System.nanoTime();

        var builder = BlogBuilder.fromPath(workingDirectory)
                .templateDirectory(templateDirectory)
                .outputDirectory(outputDirectory)
                .renderDrafts(renderDrafts);

        builder.mkdirs(force);
        builder.build();

        var end = System.nanoTime();
        System.out.printf("Exported to %s (%.2f ms)\n", outputDirectory, (end - start) / 1000000.0);

        /* Server process */

        if (startServer) {
            var server = new Server(outputDirectory);
            server.start();

            if (openBrowser) {
                server.openBrowser();
            }
        }
    }

    private static CommandLine getCommandLine(String[] args) {
        var options = new Options()
                .addOption("h", "help", false, "Show help")
                .addOption("f", "force", false, "Overwrite current build")
                .addOption("t", "template-dir", true, "Template directory. Default: working directory/template")
                .addOption("o", "output-dir", true, "Output directory. Default: working directory/generated_out")
                .addOption("s", "server", false, "Run webserver. Default: no")
                .addOption("no-browser", false, "Do NOT open browser on server start")
                .addOption("d", "draft", false, "Render drafts. Default: only with server");

        CommandLine commandLine;
        try {
            commandLine = new DefaultParser().parse(options, args);

            if (commandLine.hasOption("help"))
                throw new ParseException("Showing help");

            if (commandLine.getArgs().length == 0)
                throw new ParseException("Missing required argument: WORKDIR");

        } catch (ParseException e) {
            System.out.println(e.getMessage());
            new HelpFormatter().printHelp("blog-software-java [OPTION]... [WORKDIR]", options);

            return null;
        }

        return commandLine;
    }
}