import { readFileSync, writeFileSync, mkdirSync } from "node:fs";
import { dirname } from "node:path";

export interface BotConfig {
  webPort: number;
  locale: "zh" | "en";
  theme: "dark" | "light";
  commandPrefix: string;
  commandAliases: Record<string, string>;
  neteaseApiPort: number;
  qqMusicApiPort: number;
  adminPassword: string;
  adminGroups: number[];
  autoReturnDelay: number;
  autoPauseOnEmpty: boolean;
}

export function getDefaultConfig(): BotConfig {
  return {
    webPort: 3000,
    locale: "zh",
    theme: "dark",
    commandPrefix: "!",
    commandAliases: { p: "play", s: "skip", n: "next" },
    neteaseApiPort: 3001,
    qqMusicApiPort: 3200,
    adminPassword: "",
    adminGroups: [],
    autoReturnDelay: 300,
    autoPauseOnEmpty: true,
  };
}

export function loadConfig(path: string): BotConfig {
  const defaults = getDefaultConfig();
  try {
    const raw = readFileSync(path, "utf-8");
    const partial = JSON.parse(raw) as Partial<BotConfig>;
    return { ...defaults, ...partial };
  } catch {
    return defaults;
  }
}

export function saveConfig(path: string, config: BotConfig): void {
  mkdirSync(dirname(path), { recursive: true });
  writeFileSync(path, JSON.stringify(config, null, 2), "utf-8");
}