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package com.regnosys.rosetta.translate.synonymmap;

import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import com.regnosys.rosetta.generator.object.ExpandedAttribute;

public class AttributeGroup implements Comparable {
	/**
	 * Single path, defined as a list of attributes
	 */
	private final List attributePath;
	/**
	 * List of synonym groups. Each attribute can have multiple synonym rows
	 * associated with it
	 */
	private final List synonymGroups;

	public AttributeGroup(List synonymGroups, List attributePath) {
		//this.synonymGroups = synonymGroups;
		this.attributePath = attributePath;
		Set sgSet = new LinkedHashSet<>(synonymGroups);//pass the groups through a set in order to remove duplicates
		this.synonymGroups = new ArrayList<>(sgSet);
	}

	public List getSynonymGroups() {
		return synonymGroups;
	}

	public List getAttributePath() {
		return attributePath;
	}

	public String attsToString() {
		return attributePath.stream().map(att -> attToString(att)).collect(Collectors.joining(", "));
	}

	private String attToString(ExpandedAttribute att) {
		return att.getName() + (att.getSup() > 1 ? "*" : "");
	}

	public static String attributeName(ExpandedAttribute att) {
		String name = att.getName();
		return name;
	}

	@Override
	public String toString() {
		String atts = attsToString();
		return synonymGroups + "[" + atts + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((attributePath == null) ? 0 : attributePath.hashCode());
		result = prime * result + ((synonymGroups == null) ? 0 : synonymGroups.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		AttributeGroup other = (AttributeGroup) obj;
		if (attributePath == null) {
			if (other.attributePath != null)
				return false;
		} else if (!attributePath.equals(other.attributePath))
			return false;
		if (synonymGroups == null) {
			if (other.synonymGroups != null)
				return false;
		} else if (!synonymGroups.equals(other.synonymGroups))
			return false;
		return true;
	}

	@Override
	public int compareTo(AttributeGroup l2) {
		List atp1 = attributePath;
		List atp2 = l2.attributePath;
		int minLen = Math.min(atp1.size(), atp2.size());
		for (int i = 0; i < minLen; i++) {
			ExpandedAttribute at1 = atp1.get(i);
			ExpandedAttribute at2 = atp2.get(i);
			int comp = at1.getName().compareTo(at2.getName());
			if (comp != 0)
				return comp;
		}
		return synonymGroups.toString().compareTo(l2.synonymGroups.toString());
	}

	public boolean startsWith(String string) {
		return attributePath.size() > 0 && attributePath.get(0).getName().equals(string);
	}
	
	public long hashForGeneration() {
		long result = 0;
		for (ExpandedAttribute expandedAttribute : attributePath) {
			result += expandedAttribute.getName().hashCode();
			String enclosingType = expandedAttribute.getEnclosingType();
			if (enclosingType!=null) {
				result += enclosingType.hashCode();
			}
		}
		result *= 8191;
		for (SynonymGroup sg : synonymGroups) {
			result += sg.hashForGeneration();
		}
		return result;
	}
}