/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

// @flow

import { findClosestFunction } from "../ast";

import type { SourceLocation, Source, ASTLocation } from "../../types";
import type { Symbols } from "../../reducers/ast";

export function getASTLocation(
  source: Source,
  symbols: ?Symbols,
  location: SourceLocation
): ASTLocation {
  if (source.isWasm || !symbols || symbols.loading) {
    return { name: undefined, offset: location, index: 0 };
  }

  const scope = findClosestFunction(symbols, location);
  if (scope) {
    // we only record the line, but at some point we may
    // also do column offsets
    const line = location.line - scope.location.start.line;
    return {
      name: scope.name,
      offset: { line, column: undefined },
      index: scope.index,
    };
  }
  return { name: undefined, offset: location, index: 0 };
}

export function findFunctionByName(
  symbols: Symbols,
  name: ?string,
  index: number
) {
  if (symbols.loading) {
    return null;
  }

  return symbols.functions.find(
    node => node.name === name && node.index === index
  );
}