import { RegionModel } from '@db/Region';
import proxy from 'egg-http-proxy-middleware';

module.exports = () => {
    return async function (ctx, next) {
        if(!ctx.app.config.envToHost) {
            let envToHost = new Map<string, string>();
            let regions = await RegionModel.getAllRegion();
            for(let { env, gmLink } of regions) {
                envToHost.set(env, gmLink);
            }
            ctx.app.config.envToHost = envToHost;
        }

        let options = {};
        for(let [env, domain] of ctx.app.config.envToHost) {
            options[`/api/${env}/`] = {
                target: domain,
                changeOrigin: true,
                secure: true,
                pathRewrite: function(path) {
                  console.log('proxy', path, path.replace(`/api/${env}/`, '/api/'))
                  return path.replace(`/api/${env}/`, '/api/') 
                }
              }
        }

        console.log('### options', options)
        return proxy(options)(ctx, next);
    };
  };