export interface Logger {
  log(category: string, message: string): void;
  error(category: string, message: string): void;
}

/* eslint-disable no-console */
export let createConsoleLogger = (): Logger => {
  let currentCategory: string;
  let setCategory = (category: string) => {
    if (category !== currentCategory) {
      console.log(`${category}:`);
      currentCategory = category;
    }
  };
  return {
    log: (category, message) => {
      setCategory(category);
      console.log(`  ${message}`);
    },
    error: (category, message) => {
      setCategory(category);
      console.error(`! ${message}`);
    },
  };
};
/* tslint:enable:no-console */