/* eslint-disable no-nested-ternary */
/* eslint-disable @typescript-eslint/no-unused-vars */
import crypto from "crypto";

import { useEffect, useState } from "react";
import Head from "next/head";
import Image from "next/image";
import Link from "next/link";
import { useRouter } from "next/router";
import { faWarning, faXmark } from "@fortawesome/free-solid-svg-icons";
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import jsrp from "jsrp";
import queryString from "query-string";
import nacl from "tweetnacl";
import { encodeBase64 } from "tweetnacl-util";

import Button from "@app/components/basic/buttons/Button";
import InputField from "@app/components/basic/InputField";
import checkPassword from "@app/components/utilities/checks/password/checkPassword";
import Aes256Gcm from "@app/components/utilities/cryptography/aes-256-gcm";
import { deriveArgonKey } from "@app/components/utilities/cryptography/crypto";
import issueBackupKey from "@app/components/utilities/cryptography/issueBackupKey";
import { saveTokenToLocalStorage } from "@app/components/utilities/saveTokenToLocalStorage";
import SecurityClient from "@app/components/utilities/SecurityClient";
import { useServerConfig } from "@app/context";
import {
  completeAccountSignupInvite,
  useSelectOrganization,
  verifySignupInvite
} from "@app/hooks/api/auth/queries";
import { fetchOrganizations } from "@app/hooks/api/organization/queries";
import { navigateUserToOrg } from "@app/views/Login/Login.utils";

// eslint-disable-next-line new-cap
const client = new jsrp.client();

type Errors = {
  tooShort?: string;
  tooLong?: string;
  noLetterChar?: string;
  noNumOrSpecialChar?: string;
  repeatedChar?: string;
  escapeChar?: string;
  lowEntropy?: string;
  breached?: string;
};

export default function SignupInvite() {
  const [password, setPassword] = useState("");
  const [firstName, setFirstName] = useState("");
  const [lastName, setLastName] = useState("");
  const [firstNameError, setFirstNameError] = useState(false);
  const [lastNameError, setLastNameError] = useState(false);
  const [isLoading, setIsLoading] = useState(false);
  const [step, setStep] = useState(1);
  const [backupKeyError, setBackupKeyError] = useState(false);
  const [backupKeyIssued, setBackupKeyIssued] = useState(false);
  const [errors, setErrors] = useState<Errors>({});

  const router = useRouter();
  const parsedUrl = queryString.parse(router.asPath.split("?")[1]);
  const token = parsedUrl.token as string;
  const organizationId = parsedUrl.organization_id as string;
  const email = (parsedUrl.to as string)?.replace(" ", "+").trim();
  const { config } = useServerConfig();

  const { mutateAsync: selectOrganization } = useSelectOrganization();

  useEffect(() => {
    if (!config.allowSignUp) {
      router.push("/login");
    }
  }, [config.allowSignUp]);

  // Verifies if the information that the users entered (name, workspace) is there, and if the password matched the criteria.
  const signupErrorCheck = async () => {
    setIsLoading(true);

    let errorCheck = await checkPassword({
      password,
      setErrors
    });

    if (!firstName) {
      setFirstNameError(true);
      errorCheck = true;
    } else {
      setFirstNameError(false);
    }
    if (!lastName) {
      setLastNameError(true);
      errorCheck = true;
    } else {
      setLastNameError(false);
    }

    if (!errorCheck) {
      // Generate a random pair of a public and a private key
      const pair = nacl.box.keyPair();
      const secretKeyUint8Array = pair.secretKey;
      const publicKeyUint8Array = pair.publicKey;
      const privateKey = encodeBase64(secretKeyUint8Array);
      const publicKey = encodeBase64(publicKeyUint8Array);

      localStorage.setItem("PRIVATE_KEY", privateKey);

      client.init(
        {
          username: email,
          password
        },
        async () => {
          client.createVerifier(async (err, result) => {
            try {
              const derivedKey = await deriveArgonKey({
                password,
                salt: result.salt,
                mem: 65536,
                time: 3,
                parallelism: 1,
                hashLen: 32
              });

              if (!derivedKey) throw new Error("Failed to derive key from password");

              const key = crypto.randomBytes(32);

              // create encrypted private key by encrypting the private
              // key with the symmetric key [key]
              const {
                ciphertext: encryptedPrivateKey,
                iv: encryptedPrivateKeyIV,
                tag: encryptedPrivateKeyTag
              } = Aes256Gcm.encrypt({
                text: privateKey,
                secret: key
              });

              // create the protected key by encrypting the symmetric key
              // [key] with the derived key
              const {
                ciphertext: protectedKey,
                iv: protectedKeyIV,
                tag: protectedKeyTag
              } = Aes256Gcm.encrypt({
                text: key.toString("hex"),
                secret: Buffer.from(derivedKey.hash)
              });

              const { token: jwtToken } = await completeAccountSignupInvite({
                email,
                password,
                firstName,
                lastName,
                protectedKey,
                protectedKeyIV,
                protectedKeyTag,
                publicKey,
                encryptedPrivateKey,
                encryptedPrivateKeyIV,
                encryptedPrivateKeyTag,
                salt: result.salt,
                verifier: result.verifier
              });

              // unset temporary signup JWT token and set JWT token
              SecurityClient.setSignupToken("");
              SecurityClient.setToken(jwtToken);

              saveTokenToLocalStorage({
                publicKey,
                encryptedPrivateKey,
                iv: encryptedPrivateKeyIV,
                tag: encryptedPrivateKeyTag,
                privateKey
              });

              const userOrgs = await fetchOrganizations();

              const orgId = userOrgs[0].id;

              if (!orgId) throw new Error("You are not part of any organization");

              await selectOrganization({ organizationId: orgId });

              localStorage.setItem("orgData.id", orgId);

              setStep(3);
            } catch (error) {
              setIsLoading(false);
              console.error(error);
            }
          });
        }
      );
    } else {
      setIsLoading(false);
    }
  };

  // Step 4 of the sign up process (download the emergency kit pdf)
  const stepConfirmEmail = (
    <div className="h-7/12 mx-1 mb-36 flex w-full max-w-xs flex-col items-center rounded-xl border border-mineshaft-600 bg-mineshaft-800 py-8 px-4 drop-shadow-xl md:mb-16 md:max-w-lg md:px-6">
      <p className="mb-6 flex justify-center text-center text-4xl font-semibold text-primary-100">
        Confirm your email
      </p>
      <Image src="/images/dragon-signupinvite.svg" height={262} width={410} alt="verify email" />
      <div className="mx-auto mt-10 mb-2 flex max-h-24 max-w-md flex-col items-center justify-center px-4 text-lg md:p-2">
        <Button
          text="Confirm Email"
          onButtonPressed={async () => {
            try {
              const response = await verifySignupInvite({
                email,
                code: token,
                organizationId
              });

              if (response) {
                // user will have temp token if doesn't have an account
                // then continue with account setup workflow
                if (response?.token) {
                  SecurityClient.setSignupToken(response.token);
                  setStep(2);
                } else {
                  await selectOrganization({ organizationId });

                  // user will be redirected to dashboard
                  // if not logged in gets kicked out to login
                  await navigateUserToOrg(router, organizationId);
                }
              }
            } catch (err) {
              console.error(err);
              router.push("/requestnewinvite");
            }
          }}
          size="lg"
        />
      </div>
    </div>
  );

  // Because this is the invite signup - we directly go to the last step of signup (email is already verified)
  const main = (
    <div className="h-7/12 mx-auto mb-32 w-max rounded-xl border border-mineshaft-600 bg-mineshaft-800 py-10 px-8 drop-shadow-xl md:mb-16">
      <p className="mx-8 mb-6 flex justify-center bg-gradient-to-tr from-mineshaft-300 to-white bg-clip-text text-4xl font-bold text-transparent md:mx-16">
        Almost there!
      </p>
      <div className="relative z-0 flex max-h-24 w-full items-center justify-end rounded-lg md:p-2">
        <InputField
          label="First Name"
          onChangeHandler={setFirstName}
          type="name"
          value={firstName}
          isRequired
          errorText="Please input your first name."
          error={firstNameError}
          autoComplete="given-name"
        />
      </div>
      <div className="flex max-h-24 w-full items-center justify-center rounded-lg md:p-2">
        <InputField
          label="Last Name"
          onChangeHandler={setLastName}
          type="name"
          value={lastName}
          isRequired
          errorText="Please input your last name."
          error={lastNameError}
          autoComplete="family-name"
        />
      </div>
      <div className="mt-2 flex max-h-60 w-full flex-col items-center justify-center rounded-lg md:p-2">
        <InputField
          label="Password"
          onChangeHandler={(pass) => {
            setPassword(pass);
            checkPassword({
              password: pass,
              setErrors
            });
          }}
          type="password"
          value={password}
          isRequired
          error={Object.keys(errors).length > 0}
          autoComplete="new-password"
          id="new-password"
        />
        {Object.keys(errors).length > 0 && (
          <div className="mt-4 flex w-full flex-col items-start rounded-md bg-white/5 px-2 py-2">
            <div className="mb-2 text-sm text-gray-400">Password should contain at least:</div>
            {Object.keys(errors).map((key) => {
              if (errors[key as keyof Errors]) {
                return (
                  <div className="items-top ml-1 flex flex-row justify-start" key={key}>
                    <div>
                      <FontAwesomeIcon icon={faXmark} className="text-md ml-0.5 mr-2.5 text-red" />
                    </div>
                    <p className="text-sm text-gray-400">{errors[key as keyof Errors]}</p>
                  </div>
                );
              }

              return null;
            })}
          </div>
        )}
      </div>
      <div className="mx-auto mt-2 flex max-h-24 max-w-max flex-col items-center justify-center px-2 py-3 text-lg md:px-4 md:py-5">
        <Button
          text="Sign Up"
          onButtonPressed={() => {
            signupErrorCheck();
          }}
          loading={isLoading}
          size="lg"
        />
      </div>
    </div>
  );

  // Step 4 of the sign up process (download the emergency kit pdf)
  const step4 = (
    <div className="h-7/12 mx-1 mb-36 flex w-full max-w-xs flex-col items-center rounded-xl border border-mineshaft-600 bg-mineshaft-800 px-4 pt-8 pb-6 drop-shadow-xl md:mb-16 md:max-w-lg md:px-6">
      <p className="flex justify-center bg-gradient-to-br from-white to-mineshaft-300 bg-clip-text text-center text-4xl font-semibold text-transparent">
        Save your Emergency Kit
      </p>
      <div className="text-md mt-4 flex w-full max-w-md flex-col items-center justify-center rounded-md px-2 text-gray-400 md:mt-8">
        <div>
          If you get locked out of your account, your Emergency Kit is the only way to sign in.
        </div>
        <div className="mt-3">We recommend you download it and keep it somewhere safe.</div>
      </div>
      <div className="mx-auto mt-4 flex w-full max-w-xs flex-row items-center rounded-md bg-white/10 p-2 text-gray-400 md:max-w-md">
        <FontAwesomeIcon icon={faWarning} className="ml-2 mr-4 text-4xl" />
        It contains your Secret Key which we cannot access or recover for you if you lose it.
      </div>
      <div className="mx-auto mt-4 flex max-h-24 max-w-max flex-col items-center justify-center px-2 py-3 text-lg md:px-4 md:py-5">
        <Button
          text="Download PDF"
          onButtonPressed={async () => {
            await issueBackupKey({
              email,
              password,
              personalName: `${firstName} ${lastName}`,
              setBackupKeyError,
              setBackupKeyIssued
            });
            router.push(`/org/${organizationId}/overview`);
          }}
          size="lg"
        />
      </div>
    </div>
  );

  return (
    <div className="flex h-screen flex-col items-center justify-center bg-gradient-to-tr from-mineshaft-600 via-mineshaft-800 to-bunker-700">
      <Head>
        <title>Sign Up</title>
        <link rel="icon" href="/infisical.ico" />
      </Head>
      <Link href="/">
        <div className="mb-4 mt-20 flex justify-center">
          <Image src="/images/gradientLogo.svg" height={90} width={120} alt="Infisical Logo" />
        </div>
      </Link>
      {step === 1 ? stepConfirmEmail : step === 2 ? main : step4}
    </div>
  );
}