/// <cts-enable />
import { cell, derive, pattern, patternTool, type PatternToolResult } from "commontools";

const multiplier = cell(2);
const offset = cell(10);

type Output = {
  tool: PatternToolResult<{ offset: number }>;
};

// Test: patternTool with an existing extraParam, and a new capture
// The function has { value: number, offset: number } as input type
// We provide offset via extraParams, and the transformer should capture multiplier
export default pattern<Record<string, never>, Output>(() => {
  const tool = patternTool(
    ({ value, offset }: { value: number; offset: number }) => {
      return derive({ value, offset }, ({ value, offset }) => {
        return value * multiplier.get() + offset;
      });
    },
    { offset },
  );

  return { tool };
});