import Fingerprint2 from "fingerprintjs2";
import LogRocket from "logrocket";
import { all, call, delay, put, select, takeLatest } from "redux-saga/effects";
import {
  auth,
  firestore,
  getCurrentUser,
  logImEXEvent,
  updateCurrentUser,
} from "../../firebase/firebase.utils";
import {
  checkInstanceId,
  setInstanceConflict,
  setInstanceId,
  setLocalFingerprint,
  signInFailure,
  signInSuccess,
  signOutFailure,
  signOutSuccess,
  unauthorizedUser,
  updateUserDetailsSuccess,
  sendPasswordResetFailure,
  sendPasswordResetSuccess,
  validatePasswordResetSuccess,
  validatePasswordResetFailure,
} from "./user.actions";
import UserActionTypes from "./user.types";

export function* onEmailSignInStart() {
  yield takeLatest(UserActionTypes.EMAIL_SIGN_IN_START, signInWithEmail);
}
export function* signInWithEmail({ payload: { email, password } }) {
  try {
    logImEXEvent("redux_sign_in_attempt", { user: email });

    const { user } = yield auth.signInWithEmailAndPassword(email, password);

    yield put(
      signInSuccess({
        uid: user.uid,
        email: user.email,
        displayName: user.displayName,
        photoURL: user.photoURL,
        authorized: true,
      })
    );
  } catch (error) {
    yield put(signInFailure(error));
    logImEXEvent("redux_sign_in_failure", { user: email, error });
  }
}

export function* onCheckUserSession() {
  yield takeLatest(UserActionTypes.CHECK_USER_SESSION, isUserAuthenticated);
}
export function* isUserAuthenticated() {
  try {
    logImEXEvent("redux_auth_check");

    const user = yield getCurrentUser();
    if (!user) {
      yield put(unauthorizedUser());
      return;
    }

    LogRocket.identify(user.email);
    yield put(
      signInSuccess({
        uid: user.uid,
        email: user.email,
        displayName: user.displayName,
        photoURL: user.photoURL,
        authorized: true,
      })
    );
  } catch (error) {
    yield put(signInFailure(error));
  }
}
export function* onSignOutStart() {
  yield takeLatest(UserActionTypes.SIGN_OUT_START, signOutStart);
}
export function* signOutStart() {
  try {
    logImEXEvent("redux_sign_out");

    yield auth.signOut();
    yield put(signOutSuccess());
    localStorage.removeItem("token");
  } catch (error) {
    yield put(signOutFailure(error.message));
  }
}

export function* onUpdateUserDetails() {
  yield takeLatest(UserActionTypes.UPDATE_USER_DETAILS, updateUserDetails);
}
export function* updateUserDetails(userDetails) {
  try {
    yield updateCurrentUser(userDetails.payload);
    yield put(updateUserDetailsSuccess(userDetails.payload));
  } catch (error) {
    //yield put(signOutFailure(error.message));
    //TODO error handling
  }
}
export function* onSetInstanceId() {
  yield takeLatest(UserActionTypes.SET_INSTANCE_ID, setInstanceIdSaga);
}
export function* setInstanceIdSaga({ payload: uid }) {
  try {
    const userInstanceRef = firestore.doc(`userInstance/${uid}`);

    const fingerprint = Fingerprint2.x64hash128(
      (yield Fingerprint2.getPromise({})).map((c) => c.value).join(""),
      31
    );

    yield userInstanceRef.set({
      timestamp: new Date(),
      fingerprint,
    });

    yield put(setLocalFingerprint(fingerprint));
    yield delay(5 * 60 * 1000);
    yield put(checkInstanceId(uid));
  } catch (error) {
    console.log("error", error);
    //yield put(signOutFailure(error.message));
    //TODO error handling
  }
}

export function* onCheckInstanceId() {
  yield takeLatest(UserActionTypes.CHECK_INSTANCE_ID, checkInstanceIdSaga);
}
export function* checkInstanceIdSaga({ payload: uid }) {
  try {
    const userInstanceRef = firestore.doc(`userInstance/${uid}`);

    const snapshot = yield userInstanceRef.get();
    let fingerprint = yield select((state) => state.user.fingerprint);

    if (snapshot.data().fingerprint === fingerprint) {
      yield delay(5 * 60 * 1000);
      yield put(checkInstanceId(uid));
    } else {
      console.log("ERROR: Fingerprints do not match. Conflict detected.");
      logImEXEvent("instance_confict");
      yield put(setInstanceConflict());
    }
  } catch (error) {
    console.log("error", error);
    //TODO error handling
  }
}

export function* onSignInSuccess() {
  yield takeLatest(UserActionTypes.SIGN_IN_SUCCESS, signInSuccessSaga);
}

export function* signInSuccessSaga({ payload }) {
  LogRocket.identify(payload.email);
  yield put(setInstanceId(payload.uid));
  yield logImEXEvent("redux_sign_in_success");
}

export function* onSendPasswordResetStart() {
  yield takeLatest(
    UserActionTypes.SEND_PASSWORD_RESET_EMAIL_START,
    sendPasswordResetEmail
  );
}
export function* sendPasswordResetEmail({ payload }) {
  try {
    yield auth.sendPasswordResetEmail(payload, {
      url: "https://imex.online/passwordreset",
    });
    console.log("Good should send.");
    yield put(sendPasswordResetSuccess());
  } catch (error) {
    yield put(sendPasswordResetFailure(error.message));
  }
}

export function* onValidatePasswordResetStart() {
  yield takeLatest(
    UserActionTypes.VALIDATE_PASSWORD_RESET_START,
    validatePasswordResetStart
  );
}
export function* validatePasswordResetStart({ payload: { password, code } }) {
  try {
    yield auth.confirmPasswordReset(code, password);
    yield put(validatePasswordResetSuccess());
  } catch (error) {
    console.log("function*validatePasswordResetStart -> error", error);
    yield put(validatePasswordResetFailure(error.message));
  }
}

export function* userSagas() {
  yield all([
    call(onEmailSignInStart),
    call(onCheckUserSession),
    call(onSignOutStart),
    call(onUpdateUserDetails),
    call(onSetInstanceId),
    call(onCheckInstanceId),
    call(onSignInSuccess),
    call(onSendPasswordResetStart),
    call(onValidatePasswordResetStart),
  ]);
}