// 多模态网关凭据只允许在打包时注入，不写进仓库或路由分组配置。
const fs = require("fs");
const path = require("path");

const DEFAULT_BASE_URL = "https://api.tokendun.com";
const DEFAULT_MODEL = "MiniMax-M3";

function readJson(file) {
  try {
    return JSON.parse(fs.readFileSync(file, "utf-8"));
  } catch {
    return null;
  }
}

function configFiles() {
  const files = [];
  if (process.env.TD_MULTIMODAL_GATEWAY_CONFIG) files.push(process.env.TD_MULTIMODAL_GATEWAY_CONFIG);
  // 热更新目录不随完整安装包携带 resources；将凭据放在 userData 后可被热更新代码稳定读取。
  try {
    const { app } = require("electron");
    if (app && app.getPath) files.push(path.join(app.getPath("userData"), "multimodal-gateway.json"));
  } catch {}
  if (process.resourcesPath) files.push(path.join(process.resourcesPath, "multimodal-gateway.json"));
  files.push(path.join(__dirname, "..", "..", "resources", "multimodal-gateway.json"));
  return Array.from(new Set(files));
}

function gatewayConfig() {
  const fileConfig = configFiles().map(readJson).find(Boolean) || {};
  const baseUrl = String(process.env.TD_MULTIMODAL_GATEWAY_URL || fileConfig.baseUrl || DEFAULT_BASE_URL).trim();
  const key = String(process.env.TD_MULTIMODAL_GATEWAY_KEY || fileConfig.key || "").trim();
  const model = String(process.env.TD_MULTIMODAL_MODEL || fileConfig.model || DEFAULT_MODEL).trim();
  const sttModel = String(process.env.TD_MULTIMODAL_STT_MODEL || fileConfig.sttModel || "").trim();
  return { baseUrl, key, model, sttModel };
}

module.exports = { gatewayConfig };