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package ai.vespa.schemals.lsp.schema.rename;

import org.eclipse.lsp4j.PrepareRenameDefaultBehavior;
import org.eclipse.lsp4j.PrepareRenameResult;
import org.eclipse.lsp4j.Range;
import org.eclipse.lsp4j.jsonrpc.messages.Either3;

import ai.vespa.schemals.context.EventPositionContext;
import ai.vespa.schemals.tree.CSTUtils;
import ai.vespa.schemals.tree.Node;

/**
 * Responsible for LSP textDocument/prepareRename requests.
 *
 * We declare a rename as valid if there is a symbol at the position.
 */
public class SchemaPrepareRename {

    public static Either3 prepareRename(EventPositionContext context) {
        Node node = CSTUtils.getSymbolAtPosition(context.document.getRootNode(), context.position);

        if (node == null) {
            return null;
        }
        
        return Either3.forFirst(node.getRange());
    }
}