text: // Copyright 2012-present Oliver Eilhard. All rights reserved.
  // Use of this source code is governed by a MIT-license.
  // See http://olivere.mit-license.org/license.txt for details.
  
  package elastic
  
  // FuzzyCompletionSuggester is a CompletionSuggester that allows fuzzy
  // completion.
  // See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-suggesters-completion.html
  // for details, and
  // https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-suggesters-completion.html#fuzzy
  // for details about the fuzzy completion suggester.
  //
  // @Deprecated Use CompletionSuggester with FuzzyOptions instead.
  type FuzzyCompletionSuggester struct {
  	Suggester
  	name           string
  	text           string
  	field          string
  	analyzer       string
  	size           *int
  	shardSize      *int
  	contextQueries []SuggesterContextQuery
  
  	fuzziness           interface{}
  	fuzzyTranspositions *bool
  	fuzzyMinLength      *int
  	fuzzyPrefixLength   *int
  	unicodeAware        *bool
  }
  
  // Fuzziness defines the fuzziness which is used in FuzzyCompletionSuggester.
  type Fuzziness struct {
  }
  
  // Creates a new completion suggester.
  func NewFuzzyCompletionSuggester(name string) *FuzzyCompletionSuggester {
  	return &FuzzyCompletionSuggester{
  		name:           name,
  		contextQueries: make([]SuggesterContextQuery, 0),
  	}
  }
  
  func (q *FuzzyCompletionSuggester) Name() string {
  	return q.name
  }
  
  func (q *FuzzyCompletionSuggester) Text(text string) *FuzzyCompletionSuggester {
  	q.text = text
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) Field(field string) *FuzzyCompletionSuggester {
  	q.field = field
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) Analyzer(analyzer string) *FuzzyCompletionSuggester {
  	q.analyzer = analyzer
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) Size(size int) *FuzzyCompletionSuggester {
  	q.size = &size
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) ShardSize(shardSize int) *FuzzyCompletionSuggester {
  	q.shardSize = &shardSize
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) ContextQuery(query SuggesterContextQuery) *FuzzyCompletionSuggester {
  	q.contextQueries = append(q.contextQueries, query)
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) ContextQueries(queries ...SuggesterContextQuery) *FuzzyCompletionSuggester {
  	q.contextQueries = append(q.contextQueries, queries...)
  	return q
  }
  
  // Fuzziness defines the strategy used to describe what "fuzzy" actually
  // means for the suggester, e.g. 1, 2, "0", "1..2", ">4", or "AUTO".
  // See https://www.elastic.co/guide/en/elasticsearch/reference/5.2/common-options.html#fuzziness
  // for a detailed description.
  func (q *FuzzyCompletionSuggester) Fuzziness(fuzziness interface{}) *FuzzyCompletionSuggester {
  	q.fuzziness = fuzziness
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) FuzzyTranspositions(fuzzyTranspositions bool) *FuzzyCompletionSuggester {
  	q.fuzzyTranspositions = &fuzzyTranspositions
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) FuzzyMinLength(minLength int) *FuzzyCompletionSuggester {
  	q.fuzzyMinLength = &minLength
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) FuzzyPrefixLength(prefixLength int) *FuzzyCompletionSuggester {
  	q.fuzzyPrefixLength = &prefixLength
  	return q
  }
  
  func (q *FuzzyCompletionSuggester) UnicodeAware(unicodeAware bool) *FuzzyCompletionSuggester {
  	q.unicodeAware = &unicodeAware
  	return q
  }
  
  // Creates the source for the completion suggester.
  func (q *FuzzyCompletionSuggester) Source(includeName bool) (interface{}, error) {
  	cs := &completionSuggesterRequest{}
  
  	if q.text != "" {
  		cs.Text = q.text
  	}
  
  	suggester := make(map[string]interface{})
  	cs.Completion = suggester
  
  	if q.analyzer != "" {
  		suggester["analyzer"] = q.analyzer
  	}
  	if q.field != "" {
  		suggester["field"] = q.field
  	}
  	if q.size != nil {
  		suggester["size"] = *q.size
  	}
  	if q.shardSize != nil {
  		suggester["shard_size"] = *q.shardSize
  	}
  	switch len(q.contextQueries) {
  	case 0:
  	case 1:
  		src, err := q.contextQueries[0].Source()
  		if err != nil {
  			return nil, err
  		}
  		suggester["context"] = src
  	default:
  		var ctxq []interface{}
  		for _, query := range q.contextQueries {
  			src, err := query.Source()
  			if err != nil {
  				return nil, err
  			}
  			ctxq = append(ctxq, src)
  		}
  		suggester["context"] = ctxq
  	}
  
  	// Fuzzy Completion Suggester fields
  	fuzzy := make(map[string]interface{})
  	suggester["fuzzy"] = fuzzy
  	if q.fuzziness != nil {
  		fuzzy["fuzziness"] = q.fuzziness
  	}
  	if q.fuzzyTranspositions != nil {
  		fuzzy["transpositions"] = *q.fuzzyTranspositions
  	}
  	if q.fuzzyMinLength != nil {
  		fuzzy["min_length"] = *q.fuzzyMinLength
  	}
  	if q.fuzzyPrefixLength != nil {
  		fuzzy["prefix_length"] = *q.fuzzyPrefixLength
  	}
  	if q.unicodeAware != nil {
  		fuzzy["unicode_aware"] = *q.unicodeAware
  	}
  
  	if !includeName {
  		return cs, nil
  	}
  
  	source := make(map[string]interface{})
  	source[q.name] = cs
  	return source, nil
  }
  