'use strict';
module.exports = function generate_if(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 $valid = 'valid' + $lvl;
  var $errs = 'errs__' + $lvl;
  var $it = it.util.copy(it);
  $it.level++;
  var $nextValid = 'valid' + $it.level;
  var $thenSch = it.schema['then'],
    $elseSch = it.schema['else'],
    $thenPresent =
      $thenSch !== undefined &&
      (it.opts.strictKeywords ?
        (typeof $thenSch == 'object' && Object.keys($thenSch).length > 0) ||
        $thenSch === false
      : it.util.schemaHasRules($thenSch, it.RULES.all)),
    $elsePresent =
      $elseSch !== undefined &&
      (it.opts.strictKeywords ?
        (typeof $elseSch == 'object' && Object.keys($elseSch).length > 0) ||
        $elseSch === false
      : it.util.schemaHasRules($elseSch, it.RULES.all)),
    $currentBaseId = $it.baseId;
  if ($thenPresent || $elsePresent) {
    var $ifClause;
    $it.createErrors = false;
    $it.schema = $schema;
    $it.schemaPath = $schemaPath;
    $it.errSchemaPath = $errSchemaPath;
    out += ' var ' + $errs + ' = errors; var ' + $valid + ' = true;  ';
    var $wasComposite = it.compositeRule;
    it.compositeRule = $it.compositeRule = true;
    out += '  ' + it.validate($it) + ' ';
    $it.baseId = $currentBaseId;
    $it.createErrors = true;
    out +=
      '  errors = ' +
      $errs +
      '; if (vErrors !== null) { if (' +
      $errs +
      ') vErrors.length = ' +
      $errs +
      '; else vErrors = null; }  ';
    it.compositeRule = $it.compositeRule = $wasComposite;
    if ($thenPresent) {
      out += ' if (' + $nextValid + ') {  ';
      $it.schema = it.schema['then'];
      $it.schemaPath = it.schemaPath + '.then';
      $it.errSchemaPath = it.errSchemaPath + '/then';
      out += '  ' + it.validate($it) + ' ';
      $it.baseId = $currentBaseId;
      out += ' ' + $valid + ' = ' + $nextValid + '; ';
      if ($thenPresent && $elsePresent) {
        $ifClause = 'ifClause' + $lvl;
        out += ' var ' + $ifClause + " = 'then'; ";
      } else {
        $ifClause = "'then'";
      }
      out += ' } ';
      if ($elsePresent) {
        out += ' else { ';
      }
    } else {
      out += ' if (!' + $nextValid + ') { ';
    }
    if ($elsePresent) {
      $it.schema = it.schema['else'];
      $it.schemaPath = it.schemaPath + '.else';
      $it.errSchemaPath = it.errSchemaPath + '/else';
      out += '  ' + it.validate($it) + ' ';
      $it.baseId = $currentBaseId;
      out += ' ' + $valid + ' = ' + $nextValid + '; ';
      if ($thenPresent && $elsePresent) {
        $ifClause = 'ifClause' + $lvl;
        out += ' var ' + $ifClause + " = 'else'; ";
      } else {
        $ifClause = "'else'";
      }
      out += ' } ';
    }
    out += ' if (!' + $valid + ') {   var err =   '; /* istanbul ignore else */
    if (it.createErrors !== false) {
      out +=
        " { keyword: '" +
        'if' +
        "' , dataPath: (dataPath || '') + " +
        it.errorPath +
        ' , schemaPath: ' +
        it.util.toQuotedString($errSchemaPath) +
        ' , params: { failingKeyword: ' +
        $ifClause +
        ' } ';
      if (it.opts.messages !== false) {
        out +=
          " , message: 'should match \"' + " + $ifClause + " + '\" schema' ";
      }
      if (it.opts.verbose) {
        out +=
          ' , schema: validate.schema' +
          $schemaPath +
          ' , parentSchema: validate.schema' +
          it.schemaPath +
          ' , data: ' +
          $data +
          ' ';
      }
      out += ' } ';
    } else {
      out += ' {} ';
    }
    out +=
      ';  if (vErrors === null) vErrors = [err]; else vErrors.push(err); errors++; ';
    if (!it.compositeRule && $breakOnError) {
      /* istanbul ignore if */
      if (it.async) {
        out += ' throw new ValidationError(vErrors); ';
      } else {
        out += ' validate.errors = vErrors; return false; ';
      }
    }
    out += ' }   ';
    if ($breakOnError) {
      out += ' else { ';
    }
  } else {
    if ($breakOnError) {
      out += ' if (true) { ';
    }
  }
  return out;
};