import init, {
  open_invite,
  handle_new_lox_credential,
  trust_promotion,
  handle_trust_promotion,
  trust_migration,
  handle_trust_migration,
  set_panic_hook } from "./pkg/lox_wasm.js";
let pubkeys = await simple_request("/pubkeys");
console.log("Got pubkeys: " + pubkeys);

let requested_invite = await init().then(() => {
  set_panic_hook();
  let requested_invite = request_open_invite().then((token) => {
    return open_invite(token);
  });
  return requested_invite;
});
console.log("Got request and state: "+requested_invite);

let open_lox_cred = await init().then(() => {
  set_panic_hook();
  let cred = requested_cred("/openreq", requested_invite).then((response) => {
    console.log("Got new Level 0 Lox Credential: " + response);
    return handle_new_lox_credential(requested_invite, response, pubkeys);
  });
  return cred;
});

let requested_trust_promo = trust_promotion(open_lox_cred, pubkeys);

let trust_promo_cred = await init().then(() => {
  set_panic_hook();
  let cred = requested_cred("/trustpromo", requested_trust_promo).then((response)=> {
    console.log("Got Migration Credential for Trust Promotion: " + response);
    return handle_trust_promotion(requested_trust_promo, response);
  });
  return cred;
  });

let reachability_cred = await simple_request("/reachability");
console.log("Got reachability credential: " + reachability_cred);

let requested_trust_migration = trust_migration(open_lox_cred, trust_promo_cred, pubkeys);

let level_1_cred = await init().then(() => {
  set_panic_hook();
  let cred = requested_cred("/trustmig", requested_trust_migration).then((response)=> {
    console.log("Got new Level 1 Lox Credential: " + response);
    return handle_trust_migration(requested_trust_migration, response, pubkeys);
  });
  return cred;
  });

function requested_cred(command, requested) {
  return new Promise((fulfill, reject) => {
  let req = JSON.parse(requested);
    loxServerPostRequest(command, req.request).then((response) => {
      fulfill(JSON.stringify(response));
      return;
    }).catch(() => {
      console.log("Error requesting new Lox credential from server");
      reject();
    });
  });
}

function request_open_invite() {
  return new Promise((fulfill, reject) => {
    loxServerGetRequest("/invite").then((response) => {
      console.log("Got invitation token: " + response.invite);
      fulfill(response.invite);
      return;
    }).catch(() => {
      console.log("Error requesting open invite from Lox server");
      reject();
    });
  });
}

function simple_request(requested) {
  return new Promise((fulfill, reject) => {
    loxServerGetRequest(requested).then((response) => {
      fulfill(JSON.stringify(response));
      return;
    }).catch(() => {
      console.log("Error making simple request: " + requested);
      reject();
    });
  });
}

function loxServerGetRequest(data) {
  return new Promise((fulfill, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
      if (xhr.DONE !== xhr.readyState) {
        return;
      }
      if (xhr.status !== 200) {
        console.log("Error. Status code: "+xhr.status);
        console.log(xhr);
        reject();
        return;
      }
      const response = JSON.parse(xhr.responseText);
      fulfill(response);
      return;
    };
    try {
      xhr.open('GET', "http://localhost:8001"+data);
    } catch (err) {
      console.log("Error connecting to lox bridge db");
      reject();
      return;
    }
    xhr.send();
  });
}

function loxServerPostRequest(data, payload) {
  return new Promise((fulfill, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
      if (xhr.DONE !== xhr.readyState) {
        return;
      }
      if (xhr.status !== 200) {
        console.log("Error. Status code: "+xhr.status);
        console.log(xhr);
        reject();
        return;
      }
      const response = JSON.parse(xhr.responseText);
      fulfill(response);
      return;
    };
    try {
      xhr.open('POST', "http://localhost:8001"+data, true)
      xhr.setRequestHeader("Content-Type", "application/json");
    } catch (err) {
      console.log("Error connecting to lox bridge db");
      reject();
      return;
    }
    xhr.send(JSON.stringify(payload));
  });
}

// The correct key should be matched against a public commit to the key to
// verify that the key issuer is in fact the correct Bridge Authority
function loxKeyRequest(key_type) {
  return new Promise((fulfull, reject) => {


  })
}