import { networkInterfaces } from "node:os";
import { expect } from "chai";
import * as Bridge from "../src/bridge";
import * as utils from "../src/utils/index";
const interfaceName = !networkInterfaces()["wg_test"] ? "sh23Test":"wg_test";

function getFistIp(peerIp: string): string {
  const ip: string[] = [];
  const [cha1, cha2, cha3] = peerIp.replace(/\/.*/, "").split(".");
  const [sha1, sha2, sha3] = utils.nodeCidr4.broadcast(peerIp).split(".");
  if (cha1 === sha1) ip.push("0"); else ip.push(cha1);
  if (cha2 === sha2) ip.push("0"); else ip.push(cha2);
  if (cha3 === sha3) ip.push("0"); else  ip.push(sha3);
  ip.push("1");
  return ip.map(a => a === "NaN"?"0":a).join(".");
};


// Show
describe("Show", () => {
  it("All", () => {
    Bridge.showAll();
  });
});

describe("Create interface", async () => {
  it(`Create interface ('${interfaceName}')`, async () => {
    const serverKeys = await utils.keygen(false);
    // Make base config
    const deviceConfig: Bridge.wireguardInterface & {name: string} = {
      name: interfaceName,
      portListen: 51880,
      privateKey: serverKeys.private,
      Address: [],
      peers: {}
    };
    for (let i = 0; i < 15; i++) {
      const peerKey = await utils.keygen(true);
      const ips = [
        utils.nodeCidr4.randomIp("192.168.15.1/24"),
        utils.nodeCidr4.randomIp("192.168.15.1/24")
      ];
      deviceConfig.peers[peerKey.public] = {
        allowedIPs: [...ips, ...ips.map(utils.nodeCidr6.FourToSix)],
      };
      if (i%2 === 0) {
        deviceConfig.peers[peerKey.public].endpoint = utils.nodeCidr4.randomIp("20.0.0.1/24")+":51880";
        deviceConfig.peers[peerKey.public].presharedKey = peerKey.preshared;
      }
      ips.map(getFistIp).forEach(ip => {if (deviceConfig.Address) {if (!deviceConfig.Address.find(ips => ip === ips)) deviceConfig.Address.push(ip);}});
    }
    // remove duplicates
    if (deviceConfig.Address) deviceConfig.Address.push(...deviceConfig.Address.map(utils.nodeCidr6.FourToSix));
    return Bridge.addDevice(deviceConfig);
  });
  it("Convert wireguardInterface to config utils", () => {
    const wireguardInterface = Bridge.showAll()[interfaceName];
    const config = utils.config.Convert_wireguardInterface_to_config_utils(wireguardInterface);
    return expect(config.interface.private).equal(wireguardInterface.privateKey);
  });
  after(async () => {
    describe("Cleaning test interface", ()=>{
      it(`Remove interface ${interfaceName}`, () => Bridge.delDevice(interfaceName));
    });
  });
});