package org.simantics.document.ui;

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

import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.contentassist.ICompletionProposal;

/**
 * TODO: content assist features to be implemented
 * 
 * For a "template" implementation, see SCLTextEditorEnvironment.
 * 
 * @author Antti Villberg
 */
public class CSSTextEditorEnvironment {

    private CSSCompletionProposal[] proposalCache = new CSSCompletionProposal[0];
    private List<CSSCompletionProposal> moduleProposalCache = new ArrayList<>(0);

    public void updateEnvironment(IDocument document) {
        // TODO: implement if necessary
    }

    public ICompletionProposal[] getCompletionProposals(String tmpPrefix, int offset) {
        // TODO: find proposals
        List<CSSCompletionProposal> proposals = new ArrayList<>();
        moduleProposalCache = proposals;
        Collections.sort(proposals, COMPARATOR);
        moduleProposalCache.addAll(proposals);
        proposalCache = moduleProposalCache.toArray(new CSSCompletionProposal[moduleProposalCache.size()]);
        return proposalCache;
    }

    private static final Comparator<CSSCompletionProposal> COMPARATOR = (prop1, prop2) -> {
        if (prop1.isPrivate() && !prop2.isPrivate())
            return -1;
        else if (!prop1.isPrivate() && prop2.isPrivate())
            return 1;
        return prop1.getName().compareTo(prop2.getName());
    };

    public String getHoverInfo(String text) {
        return null;
    }
}