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package se.l4.silo.index;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import se.l4.commons.serialization.AllowAny;
import se.l4.commons.serialization.Expose;
import se.l4.commons.serialization.ReflectionSerializer;
import se.l4.commons.serialization.Use;

@Use(ReflectionSerializer.class)
public class IndexQueryRequest
{
	@Expose
	private long offset;
	@Expose
	private long limit;

	@Expose
	private List criterias;
	@Expose
	private List sort;
	@Expose
	private boolean reverseDefaultSort;

	public IndexQueryRequest()
	{
	}

	public long getOffset()
	{
		return offset;
	}

	public void setOffset(long offset)
	{
		this.offset = offset;
	}

	public long getLimit()
	{
		return limit;
	}

	public void setLimit(long limit)
	{
		this.limit = limit;
	}

	public List getCriterias()
	{
		return criterias == null ? Collections.emptyList() : criterias;
	}

	public void addCritera(String field, Op op, Object value)
	{
		if(criterias == null)
		{
			criterias = new ArrayList<>();
		}

		Criterion c = new Criterion();
		c.field = field;
		c.op = op;
		c.value = value;

		criterias.add(c);
	}

	public List getSort()
	{
		return sort == null ? Collections.emptyList() : sort;
	}

	public void addSort(String field, boolean ascending)
	{
		if(sort == null)
		{
			sort = new ArrayList<>();
		}

		SortOnField s = new SortOnField();
		s.field = field;
		s.ascending = ascending;

		sort.add(s);
	}

	public boolean isReverseDefaultSort()
	{
		return reverseDefaultSort;
	}

	public void setReverseDefaultSort(boolean reverseDefaultSort)
	{
		this.reverseDefaultSort = reverseDefaultSort;
	}

	@Use(ReflectionSerializer.class)
	public static class Criterion
	{
		@Expose
		private String field;
		@Expose
		private Op op;
		@Expose
		@AllowAny
		private Object value;

		public String getField()
		{
			return field;
		}

		public Op getOp()
		{
			return op;
		}

		public Object getValue()
		{
			return value;
		}
	}

	public enum Op
	{
		EQUAL,
		LESS_THAN,
		LESS_THAN_OR_EQUAL_TO,
		MORE_THAN,
		MORE_THAN_OR_EQUAL_TO
	}

	@Use(ReflectionSerializer.class)
	public static class SortOnField
	{
		@Expose
		private String field;
		@Expose
		private boolean ascending;

		public String getField()
		{
			return field;
		}

		public boolean isAscending()
		{
			return ascending;
		}
	}
}