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import { blue, datetime, red, reset, yellow } from "./deps.ts";
const LOG_LEVELS = {  debug: {    color: reset,    symbol: "✔",  },  info: {    color: blue,    symbol: "ℹ",  },  warn: {    color: yellow,    symbol: "⚠",  },  error: {    color: red,    symbol: "✖",  },};
/** * The type for the log level. * These correspond to the built-in `console` method. */export type LogLevel = "debug" | "info" | "warn" | "error";
/** * Timestamp-Level-Log for Deno. * * @Example * ```ts *  const log = new Log(); *  log.debug("debug"); *  log.info("info", true, null); *  log.warn(["warning", 1, 2.4]); *  try { *    Deno.readFileSync("hello.txt"); *  } catch (error) { *    log.error({error}); *  } * ``` */export class Log {  private datetimeFormat: string;  private levelSign: (logLevel: LogLevel) => string;  private suffix: string[];
  /**   * Log constructor.   * @param minLogLevel [default:"debug"] Minimum level to log.   * @param levelIndicator [default:"symbol"] Indicator type of log level.   * @param datetimeFormat [default:"YYYY-MM-ddTHH:mm:ssZ"] Format of the timestamp. To use this, follow [the documentation of Ptera](https://tak-iwamoto.github.io/ptera/format.html).   * @param addNewLine [default:false] Flag to add new line after the each log or not.   *   * @Example   * ```ts   *  const log = new Log({ minLogLevel: "info", addNewLine: true });   *  log.debug("This will not be displayed");   *  log.info("System all green");   * ```   */  constructor({    minLogLevel = "debug",    levelIndicator = "symbol",    datetimeFormat = "YYYY-MM-ddTHH:mm:ssZ",    addNewLine = false,  }: {    minLogLevel?: LogLevel;    levelIndicator?: "none" | "full" | "initial" | "symbol";    datetimeFormat?: string;    addNewLine?: boolean;  } = {}) {    for (const level of Object.keys(LOG_LEVELS) as LogLevel[]) {      if (minLogLevel === level) break;      this[level] = () => ({});    }
    this.datetimeFormat = datetimeFormat;    this.suffix = addNewLine ? ["\n"] : [];
    this.levelSign = {      none: () => "",      full: (logLevel: LogLevel) => " " + logLevel.toUpperCase().padEnd(5),      initial: (logLevel: LogLevel) => " " + logLevel[0].toUpperCase(),      symbol: (logLevel: LogLevel) => " " + LOG_LEVELS[logLevel].symbol,    }[levelIndicator];  }
  private prefix(date: Date, logLevel: LogLevel) {    const timestamp = datetime(date).format(this.datetimeFormat);    const prefix = `${timestamp}${this.levelSign(logLevel)}`.trimStart();    return prefix ? [LOG_LEVELS[logLevel].color(prefix)] : [];  }
  private output(date: Date, logLevel: LogLevel, args: unknown[]) {    const prefix = this.prefix(date, logLevel);    console[logLevel](...prefix, ...args, ...this.suffix);  }
  /**   * Output `debug` level log with timestamp and level indicator.   * @param args What to output.   */  debug(...args: unknown[]) {    this.output(new Date(), "debug", args);  }
  /**   * Output `info` level log with timestamp and level indicator.   * @param args What to output.   */  info(...args: unknown[]) {    this.output(new Date(), "info", args);  }
  /**   * Output `warn` level log with timestamp and level indicator.   * @param args What to output.   */  warn(...args: unknown[]) {    this.output(new Date(), "warn", args);  }
  /**   * Output `error` level log with timestamp and level indicator.   * @param args What to output.   */  error(...args: unknown[]) {    this.output(new Date(), "error", args);  }}