package lsp

import (
	"errors"

	"github.com/tliron/glsp"
	protocol "github.com/tliron/glsp/protocol_3_16"
)

func (s *Server) textDocumentDefinition(ctx *glsp.Context, params *protocol.DefinitionParams) (any, error) {
	file := s.getFile(params.TextDocument.URI)
	if file == nil {
		return nil, nil
	}
	if file.Block == nil {
		return nil, errors.New("Attempted to goto definition on a file with no AST")
	}

	// TODO:
	// pos := file.LineBreaks.ToPos(params.Position)
	// nodePath := ast.GetNode(file.AST, pos)
	// def := file.Env.FindDefinition(nodePath)
	// if def == nil {
	// 	return nil, nil
	// }
	// return &protocol.Location{
	// 	URI:   params.TextDocument.URI,
	// 	Range: file.File.ToProtocolRange(ast.Range(def)),
	// }, nil
	return nil, nil
}