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use crate;
use crate::;
/// The disjunction max query returns documents matching one or more wrapped queries,
/// called query clauses or clauses.
///
/// If a returned document matches multiple query clauses,
/// the `DisjunctionMaxQuery` assigns the document the highest relevance score from any matching
/// clause, plus a tie breaking increment for any additional matching subqueries.
///
/// ```rust
/// use lucivy::collector::TopDocs;
/// use lucivy::doc;
/// use lucivy::query::{DisjunctionMaxQuery, Query, QueryClone, TermQuery};
/// use lucivy::schema::{IndexRecordOption, Schema, TEXT};
/// use lucivy::Term;
/// use lucivy::Index;
/// use lucivy::IndexWriter;
///
/// fn main() -> lucivy::Result<()> {
/// let mut schema_builder = Schema::builder();
/// let title = schema_builder.add_text_field("title", TEXT);
/// let body = schema_builder.add_text_field("body", TEXT);
/// let schema = schema_builder.build();
/// let index = Index::create_in_ram(schema);
/// {
/// let mut index_writer: IndexWriter = index.writer(15_000_000)?;
/// index_writer.add_document(doc!(
/// title => "The Name of Girl",
/// ))?;
/// index_writer.add_document(doc!(
/// title => "The Diary of Muadib",
/// ))?;
/// index_writer.add_document(doc!(
/// title => "The Diary of Girl",
/// ))?;
/// index_writer.commit()?;
/// }
///
/// let reader = index.reader()?;
/// let searcher = reader.searcher();
///
/// // Make TermQuery's for "girl" and "diary" in the title
/// let girl_term_query: Box<dyn Query> = Box::new(TermQuery::new(
/// Term::from_field_text(title, "girl"),
/// IndexRecordOption::Basic,
/// ));
/// let diary_term_query: Box<dyn Query> = Box::new(TermQuery::new(
/// Term::from_field_text(title, "diary"),
/// IndexRecordOption::Basic,
/// ));
///
/// // TermQuery "diary" and "girl" should be present and only one should be accounted in score
/// let queries1 = vec![diary_term_query.box_clone(), girl_term_query.box_clone()];
/// let diary_and_girl = DisjunctionMaxQuery::new(queries1);
/// let documents = searcher.search(&diary_and_girl, &TopDocs::with_limit(3).order_by_score())?;
/// assert_eq!(documents[0].0, documents[1].0);
/// assert_eq!(documents[1].0, documents[2].0);
///
/// // TermQuery "diary" and "girl" should be present
/// // and one should be accounted with multiplier 0.7
/// let queries2 = vec![diary_term_query.box_clone(), girl_term_query.box_clone()];
/// let tie_breaker = 0.7;
/// let diary_and_girl_with_tie_breaker = DisjunctionMaxQuery::with_tie_breaker(queries2, tie_breaker);
/// let documents = searcher.search(&diary_and_girl_with_tie_breaker, &TopDocs::with_limit(3).order_by_score())?;
/// assert_eq!(documents[1].0, documents[2].0);
/// // For this test all terms brings the same score. So we can do easy math and assume that
/// // `DisjunctionMaxQuery` with tie breakers score should be equal
/// // to term1 score + `tie_breaker` * term2 score or (1.0 + tie_breaker) * term score
/// assert!(f32::abs(documents[0].0 - documents[1].0 * (1.0 + tie_breaker)) < 0.001);
/// Ok(())
/// }
/// ```