'use strict';
module.exports = function generate_pattern(it, $keyword, $ruleType) {
  var out = ' ';
  var $lvl = it.level;
  var $dataLvl = it.dataLevel;
  var $schema = it.schema[$keyword];
  var $schemaPath = it.schemaPath + it.util.getProperty($keyword);
  var $errSchemaPath = it.errSchemaPath + '/' + $keyword;
  var $breakOnError = !it.opts.allErrors;
  var $data = 'data' + ($dataLvl || '');
  var $isData = it.opts.$data && $schema && $schema.$data,
    $schemaValue;
  if ($isData) {
    out +=
      ' var schema' +
      $lvl +
      ' = ' +
      it.util.getData($schema.$data, $dataLvl, it.dataPathArr) +
      '; ';
    $schemaValue = 'schema' + $lvl;
  } else {
    $schemaValue = $schema;
  }
  var $regexp =
    $isData ? '(new RegExp(' + $schemaValue + '))' : it.usePattern($schema);
  out += 'if ( ';
  if ($isData) {
    out +=
      ' (' +
      $schemaValue +
      ' !== undefined && typeof ' +
      $schemaValue +
      " != 'string') || ";
  }
  out += ' !' + $regexp + '.test(' + $data + ') ) {   ';
  var $$outStack = $$outStack || [];
  $$outStack.push(out);
  out = ''; /* istanbul ignore else */
  if (it.createErrors !== false) {
    out +=
      " { keyword: '" +
      'pattern' +
      "' , dataPath: (dataPath || '') + " +
      it.errorPath +
      ' , schemaPath: ' +
      it.util.toQuotedString($errSchemaPath) +
      ' , params: { pattern:  ';
    if ($isData) {
      out += '' + $schemaValue;
    } else {
      out += '' + it.util.toQuotedString($schema);
    }
    out += '  } ';
    if (it.opts.messages !== false) {
      out += ' , message: \'should match pattern "';
      if ($isData) {
        out += "' + " + $schemaValue + " + '";
      } else {
        out += '' + it.util.escapeQuotes($schema);
      }
      out += '"\' ';
    }
    if (it.opts.verbose) {
      out += ' , schema:  ';
      if ($isData) {
        out += 'validate.schema' + $schemaPath;
      } else {
        out += '' + it.util.toQuotedString($schema);
      }
      out +=
        '         , parentSchema: validate.schema' +
        it.schemaPath +
        ' , data: ' +
        $data +
        ' ';
    }
    out += ' } ';
  } else {
    out += ' {} ';
  }
  var __err = out;
  out = $$outStack.pop();
  if (!it.compositeRule && $breakOnError) {
    /* istanbul ignore if */
    if (it.async) {
      out += ' throw new ValidationError([' + __err + ']); ';
    } else {
      out += ' validate.errors = [' + __err + ']; return false; ';
    }
  } else {
    out +=
      ' var err = ' +
      __err +
      ';  if (vErrors === null) vErrors = [err]; else vErrors.push(err); errors++; ';
  }
  out += '} ';
  if ($breakOnError) {
    out += ' else { ';
  }
  return out;
};