import Util from 'shared/utils/util';
import Semver from 'npm:semver';

export function satisfies(version, range) {
  // Semver doesn't take padding zeros like 17.03.1
  range = range.replace(/\.0+(\d+)/g, '.$1');
  version = version.replace(/\.0+(\d+)/g, '.$1');

  if ( !Semver.validRange(range) ) {
    console.error('Invalid semver range:', range);

    return false;
  }

  if ( !Semver.valid(version) ) {
    console.error('Invalid semver version:', version);

    return false;
  }

  return Semver.satisfies(version, range);
}

// @TODO replace with semver calls and verify compare works the same for -preX tags
export function parse(str) {
  str = `${ str }`;

  // Trim off leading 'v'
  if ( str.substr(0, 1).toLowerCase() === 'v' ) {
    str = str.substr(1);
  }

  let parts = str.split(/[.-]/);

  return parts;
}

function comparePart(in1, in2) {
  in1 = (`${ in1 }`).toLowerCase();
  in2 = (`${ in2 }`).toLowerCase();

  if ( Util.isNumeric(in1) && Util.isNumeric(in2) ) {
    let num1 = parseInt(in1, 10);
    let num2 = parseInt(in2, 10);

    if ( !isNaN(num1) && !isNaN(num2) ) {
      return num1 - num2;
    }
  }

  return in1.localeCompare(in2);
}

export function compare(in1, in2) {
  if ( !in1 ) {
    return 1;
  }

  if ( !in2 ) {
    return -1;
  }

  let p1 = parse(in1);
  let p2 = parse(in2);

  let minLen = Math.min(p1.length, p2.length);

  for ( let i = 0 ; i < minLen ; i++ ) {
    let res = comparePart(p1[i], p2[i]);

    if ( res !== 0 ) {
      return res;
    }
  }

  return p1.length - p2.length;
}

export function minorVersion(str) {
  let [major, minor] = parse(str);

  if ( !minor ) {
    return `v${ major }.0`;
  }

  return `v${  major  }.${  minor }`;
}