import 'package:codebrowser_dart/process.dart';
import 'package:codebrowser_dart/project.dart';
import 'dart:io';

void printUsageAndExit() {
  print("Usage: ./generator [project_name:version] [source_dir] [output dir]");
  exit(1);
}

String monthShortName(int month) {
  List<String> months = [
    'Jan',
    'Feb',
    'Mar',
    'Apr',
    'May',
    'Jun',
    'Jul',
    'Aug',
    'Sep',
    'Oct',
    'Nov',
    'Dec'
  ];
  return months[month - 1];
}

void main(List<String> arguments) async {
  if (arguments.length < 3) {
    printUsageAndExit();
  }

  final projectNameAndInfo = arguments.first.split(':');
  if (projectNameAndInfo.length != 2) {
    print("Error: Project must be specified as PROJECT:VERSION");
    printUsageAndExit();
  }
  final projectName = projectNameAndInfo[0];
  final projectVersion = projectNameAndInfo[1];

  final dir = Directory.fromUri(Uri.parse(arguments[1]));
  if (!dir.existsSync()) {
    print("Error: The source directory you provided doesn't exist");
    exit(1);
  }

  final outDir = Directory.fromUri(Uri.parse(arguments[2]));
  if (!outDir.existsSync()) {
    outDir.createSync();
  }

  final dateTime = DateTime.now();
  String date =
      "${dateTime.year}-${monthShortName(dateTime.month)}-${dateTime.day}";
  final project =
      Project(name: projectName, version: projectVersion, date: date);

  final sw = Stopwatch();
  sw.start();

  await processDirectory(
    project: project,
    sourceDir: dir.absolute,
    outputDir: outDir.absolute,
  );

  print("Generation finished, took: ${sw.elapsed}");
}