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import { generateColor, ColorFunction } from "./colors.ts";import { encode } from "./deps.ts";import { format } from "./format.ts";
export interface Debug {  (fmt: string, ...args: unknown[]): void;  self: Debugger;}
export class Debugger {  manager: DebugManager;  ns: string;  color: ColorFunction;  last: number;  enabled: boolean;
  constructor(manager: DebugManager, namespace: string) {    this.manager = manager;    this.ns = namespace;    this.color = generateColor(namespace);    this.last = 0;    this.enabled = manager.enabled.some((r) => r.test(namespace));  }
  log(fmt: string, ...args: unknown[]): void {    if (!this.enabled) return;    const diff = Date.now() - (this.last || Date.now());    fmt = format(fmt, ...args);    const msg = `${this.color(this.ns)} ${fmt} ${this.color(`+${diff}ms`)}\n`;    Deno.stderr.writeSync(encode(msg));    this.last = Date.now();  }}
class DebugManager {  debuggers: Map<string, Debugger>;  enabled: RegExp[];
  constructor(enabled?: RegExp[]) {    this.debuggers = new Map();    this.enabled = enabled ?? [];  }}
function extract(opts?: string): RegExp[] {  if (!opts || opts.length === 0) return [];  opts = opts.replace(/\s/g, "").replace(/\*/g, ".+");  return opts.split(",").map((rule) => new RegExp(`^${rule}$`));}
let manager: DebugManager;
export function withoutEnv(enabled?: RegExp[] | string) {  if (!enabled) enabled = [];  if (typeof enabled === "string") enabled = extract(enabled);  manager = new DebugManager(enabled);}
export function debug(namespace: string): Debug {  if (!manager) manager = new DebugManager(extract(Deno.env.get("DEBUG")));
  const dbg = new Debugger(manager, namespace);  manager.debuggers.set(namespace, dbg);  const de: Debug = Object.assign(dbg.log.bind(dbg), {    self: dbg,  });  return de;}