'use strict';
module.exports = function generate_format(it, $keyword) {
  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 $errorKeyword;
  var $data = 'data' + ($dataLvl || '');
  if (it.opts.format === false) {
    if ($breakOnError) {
      out += ' if (true) { ';
    }
    return out;
  }
  var $isData = it.opts.v5 && $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 $unknownFormats = it.opts.unknownFormats,
    $allowUnknown = Array.isArray($unknownFormats);
  if ($isData) {
    var $format = 'format' + $lvl;
    out += ' var ' + ($format) + ' = formats[' + ($schemaValue) + ']; var isObject' + ($lvl) + ' = typeof ' + ($format) + ' == \'object\' && !(' + ($format) + ' instanceof RegExp) && ' + ($format) + '.validate; if (isObject' + ($lvl) + ') { ';
    if (it.async) {
      out += ' var async' + ($lvl) + ' = ' + ($format) + '.async; ';
    }
    out += ' ' + ($format) + ' = ' + ($format) + '.validate; } if (  ';
    if ($isData) {
      out += ' (' + ($schemaValue) + ' !== undefined && typeof ' + ($schemaValue) + ' != \'string\') || ';
    }
    out += ' (';
    if ($unknownFormats === true || $allowUnknown) {
      out += ' (' + ($schemaValue) + ' && !' + ($format) + ' ';
      if ($allowUnknown) {
        out += ' && self._opts.unknownFormats.indexOf(' + ($schemaValue) + ') == -1 ';
      }
      out += ') || ';
    }
    out += ' (' + ($format) + ' && !(typeof ' + ($format) + ' == \'function\' ? ';
    if (it.async) {
      out += ' (async' + ($lvl) + ' ? ' + (it.yieldAwait) + ' ' + ($format) + '(' + ($data) + ') : ' + ($format) + '(' + ($data) + ')) ';
    } else {
      out += ' ' + ($format) + '(' + ($data) + ') ';
    }
    out += ' : ' + ($format) + '.test(' + ($data) + '))))) {';
  } else {
    var $format = it.formats[$schema];
    if (!$format) {
      if ($unknownFormats === true || ($allowUnknown && $unknownFormats.indexOf($schema) == -1)) {
        throw new Error('unknown format "' + $schema + '" is used in schema at path "' + it.errSchemaPath + '"');
      } else {
        if (!$allowUnknown) {
          console.warn('unknown format "' + $schema + '" ignored in schema at path "' + it.errSchemaPath + '"');
          if ($unknownFormats !== 'ignore') console.warn('In the next major version it will throw exception. See option unknownFormats for more information');
        }
        if ($breakOnError) {
          out += ' if (true) { ';
        }
        return out;
      }
    }
    var $isObject = typeof $format == 'object' && !($format instanceof RegExp) && $format.validate;
    if ($isObject) {
      var $async = $format.async === true;
      $format = $format.validate;
    }
    if ($async) {
      if (!it.async) throw new Error('async format in sync schema');
      var $formatRef = 'formats' + it.util.getProperty($schema) + '.validate';
      out += ' if (!(' + (it.yieldAwait) + ' ' + ($formatRef) + '(' + ($data) + '))) { ';
    } else {
      out += ' if (! ';
      var $formatRef = 'formats' + it.util.getProperty($schema);
      if ($isObject) $formatRef += '.validate';
      if (typeof $format == 'function') {
        out += ' ' + ($formatRef) + '(' + ($data) + ') ';
      } else {
        out += ' ' + ($formatRef) + '.test(' + ($data) + ') ';
      }
      out += ') { ';
    }
  }
  var $$outStack = $$outStack || [];
  $$outStack.push(out);
  out = ''; /* istanbul ignore else */
  if (it.createErrors !== false) {
    out += ' { keyword: \'' + ($errorKeyword || 'format') + '\' , dataPath: (dataPath || \'\') + ' + (it.errorPath) + ' , schemaPath: ' + (it.util.toQuotedString($errSchemaPath)) + ' , params: { format:  ';
    if ($isData) {
      out += '' + ($schemaValue);
    } else {
      out += '' + (it.util.toQuotedString($schema));
    }
    out += '  } ';
    if (it.opts.messages !== false) {
      out += ' , message: \'should match format "';
      if ($isData) {
        out += '\' + ' + ($schemaValue) + ' + \'';
      } else {
        out += '' + (it.util.escapeQuotes($schema));
      }
      out += '"\' ';
    }
    if (it.opts.verbose) {
      out += ' , schema:  ';
      if ($isData) {
        out += 'validate.schema' + ($schemaPath);
      } else {
        out += '' + (it.util.toQuotedString($schema));
      }
      out += '         , parentSchema: validate.schema' + (it.schemaPath) + ' , data: ' + ($data) + ' ';
    }
    out += ' } ';
  } else {
    out += ' {} ';
  }
  var __err = out;
  out = $$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;
}