/* eslint-disable no-magic-numbers, no-ternary */

import * as constants from 'corpus-common-addon/utils/constants';

export function isLexvoLink(s) {

  return s && typeof s === 'string' && s.startsWith(constants.LEXVO_BASE_URL);

}

export function isBnfLink(s) {

  return s &&

    typeof s === 'string' &&

    (s.startsWith(constants.BNF_BASE_URL) ||

    s.startsWith(constants.BNF_ARK_BASE_URL) ||

    s.startsWith(constants.BNF_ARK_BASE_ID));

}

export function isArkBnfLink(s) {

  return s &&

    typeof s === 'string' &&

    (s.startsWith(constants.BNF_BASE_URL + constants.BNF_ARK_BASE_ID) ||

    s.startsWith(constants.BNF_ARK_BASE_URL + constants.BNF_ARK_BASE_ID));

}

export function isGeonamesLink(s) {

  return (typeof s === 'string') && (s.match(constants.GEONAMES_BASE_URLS) !== null);

}

export function getGeonamesCode(s) {

  const m = s.match(constants.GEONAMES_BASE_URLS);

  let code = s;

  if (m) {

    code = s.slice(m[0].length);

  }

  return code.replace(/\/+$/, '');

}

export function isViafLink(s) {

  return (typeof s === 'string') && (s.match(constants.VIAF_URL_REGEXP) !== null);

}

export function getViafCode(s) {

  const m = s.match(constants.VIAF_URL_REGEXP);

  let code = s;

  if (m) {

    code = s.slice(m[0].length);

  }

  return code.replace(/\/+$/, '');

}

export function switchArkBnfLink(s) {

  if (!s) {

    return s;

  }

  if (typeof s === 'string' && s.startsWith(constants.BNF_BASE_URL + constants.BNF_ARK_BASE_ID)) {

    return constants.BNF_ARK_BASE_URL + s.slice(constants.BNF_BASE_URL.length);

  } else if (typeof s === 'string' && s.startsWith(constants.BNF_ARK_BASE_URL + constants.BNF_ARK_BASE_ID)) {

    return constants.BNF_BASE_URL + s.slice(constants.BNF_ARK_BASE_URL.length);

  }

  return s;

}

export function calculateBnfArkControlChar(id) {

  if (!id) {

    return null;

  }

  const sum = _.reduce(id, function (s, c, i) {

    return s + (i + 1) * (c in constants.NOID_CHARS_POS ? constants.NOID_CHARS_POS[c] : 0);

  }, 0);

  return constants.NOID_CHARS[sum % constants.NOID_CHARS.length];

}

export function getOLACBaseUrl(literalVal) {

  let olacRes = null;

  if (!literalVal) {

    return null;

  }

  if (typeof literalVal !== 'object') {

    return null;

  }

  const datatype = literalVal.datatype;

  if (!datatype) {

    return null;

  }

  _.forEach(constants.OLAC_BASE_URL, function (olacDef, urlPrefix) {

    if (_.startsWith(datatype, urlPrefix)) {

      olacRes = olacDef;

      return false; // we found it, we exit early

    }

    return true;

  });

  return olacRes;

}

export function isOLACLiteral(literalDef) {

  const olacDef = getOLACBaseUrl(literalDef);

  return Boolean(olacDef);

}

export function isDCMILink(s) {

  return s && typeof s === 'string' && s.startsWith(constants.DCMI_BASE_URL);

}

export function getPeriodMatches(periodStr) {

  let dateStr = periodStr;

  if (!dateStr) {

    return null;

  }

  dateStr = dateStr.trim();

  const m = dateStr.match(/^(\d{4})-(\d{4})$/) ||

    dateStr.match(/^start\s*=\s*([^\s]+)\s*;\s*end\s*=\s*([^\s]+)$/) ||

    dateStr.match(/^end\s*=\s*([^\s]+)\s*;\s*start\s*=\s*([^\s]+)$/);

  if (!m) {

    return null;

  }

  const [, dateStr1, dateStr2] = m;

  let date1 = new Date(dateStr1);

  let date2 = new Date(dateStr2);

  if (isNaN(date1.getTime()) || isNaN(date2.getTime())) {

    return null;

  }

  if (date2 < date1) {

    [date1, date2] = [date2, date1];

  }

  return {

    start: {str: dateStr1, date: date1},

    end: {str: dateStr2, date: date2}

  };

}