import {
  AbsoluteTime,
  Codec,
  TranslatedString,
  buildCodecForObject,
  codecForAbsoluteTime,
  codecForString,
} from "@gnu-taler/taler-util";
import {
  notifyError,
  notifyInfo,
  useLocalStorage,
  useMemoryStorage,
  useTranslationContext,
} from "@gnu-taler/web-util/browser";
import { VNode, h } from "preact";
import { useEffect, useState } from "preact/hooks";
import {
  Account,
  LockedAccount,
  UnwrapKeyError,
  createNewAccount,
  unlockAccount,
} from "../account.js";
import { createNewForm } from "../handlers/forms.js";

export interface Officer {
  account: LockedAccount;
  when: AbsoluteTime;
}

const codecForLockedAccount = codecForString() as Codec<LockedAccount>;

export const codecForOfficer = (): Codec<Officer> =>
  buildCodecForObject<Officer>()
    .property("account", codecForLockedAccount) // FIXME
    .property("when", codecForAbsoluteTime) // FIXME
    .build("Officer");

export function Officer() {
  const password = useMemoryStorage("password");
  const officer = useLocalStorage("officer", {
    codec: codecForOfficer(),
  });
  const [keys, setKeys] = useState<Account>();

  useEffect(() => {
    if (officer.value === undefined || password.value === undefined) {
      return;
    }

    unlockAccount(officer.value.account, password.value)
      .then((keys) => setKeys(keys ?? { accountId: "", pub: "" }))
      .catch((e) => {
        if (e instanceof UnwrapKeyError) {
          console.log(e);
        }
      });
  }, [officer.value, password.value]);

  if (officer.value === undefined || !officer.value.account) {
    return (
      <CreateAccount
        onNewAccount={(account, pwd) => {
          password.update(pwd);
          officer.update({ account, when: AbsoluteTime.now() });
        }}
      />
    );
  }

  if (password.value === undefined) {
    return (
      <UnlockAccount
        lockedAccount={officer.value.account}
        onAccountUnlocked={(pwd) => {
          password.update(pwd);
        }}
      />
    );
  }

  return (
    <div>
      <h1 class="my-2 text-3xl font-bold tracking-tight text-gray-900 ">
        Public key
      </h1>
      <div class="max-w-xl text-base leading-7 text-gray-700 lg:max-w-lg">
        <p class="mt-6 font-mono break-all">{keys?.accountId}</p>
      </div>
      <p>
        <a
          href={`mailto:aml@exchange.taler.net?body=${encodeURIComponent(
            `I want my AML account\n\n\nPubKey: ${keys?.accountId}`,
          )}`}
          target="_blank"
          rel="noreferrer"
          class="m-4 block rounded-md w-fit border-0 px-3 py-2 text-center text-sm bg-indigo-700 text-white shadow-sm hover:bg-indigo-700"
        >
          Request account activation
        </a>
      </p>
      <p>
        <button
          type="button"
          onClick={() => {
            password.reset();
          }}
          class="m-4 block rounded-md border-0 bg-gray-200 px-3 py-2 text-center text-sm text-black shadow-sm "
        >
          Lock account
        </button>
      </p>
      <p>
        <button
          type="button"
          onClick={() => {
            officer.reset();
          }}
          class="m-4 block rounded-md bg-red-600 px-3 py-2 text-center text-sm  text-white shadow-sm hover:bg-red-500 "
        >
          Remove account
        </button>
      </p>
    </div>
  );
}

function CreateAccount({
  onNewAccount,
}: {
  onNewAccount: (account: LockedAccount, password: string) => void;
}): VNode {
  const { i18n } = useTranslationContext();
  const Form = createNewForm<{
    password: string;
    repeat: string;
  }>();

  return (
    <div class="flex min-h-full flex-col ">
      <div class="sm:mx-auto sm:w-full sm:max-w-md">
        <h2 class="mt-6 text-center text-2xl font-bold leading-9 tracking-tight text-gray-900">
          Create account
        </h2>
      </div>

      <div class="mt-10 sm:mx-auto sm:w-full sm:max-w-[480px] ">
        <div class="bg-gray-100 px-6 py-6 shadow sm:rounded-lg sm:px-12">
          <Form.Provider
            computeFormState={(v) => {
              return {
                password: {
                  error: !v.password
                    ? i18n.str`required`
                    : v.password.length < 8
                    ? i18n.str`should have at least 8 characters`
                    : !v.password.match(/[a-z]/) && v.password.match(/[A-Z]/)
                    ? i18n.str`should have lowercase and uppercase characters`
                    : !v.password.match(/\d/)
                    ? i18n.str`should have numbers`
                    : !v.password.match(/[^a-zA-Z\d]/)
                    ? i18n.str`should have at least one character which is not a number or letter`
                    : undefined,
                },
                repeat: {
                  // error: !v.repeat
                  //   ? i18n.str`required`
                  //   // : v.repeat !== v.password
                  //   // ? i18n.str`doesn't match`
                  //   : undefined,
                },
              };
            }}
            onSubmit={async (v) => {
              const account = await createNewAccount(v.password);
              onNewAccount(account, v.password);
            }}
          >
            <div class="mb-4">
              <Form.InputLine
                label={"Password" as TranslatedString}
                name="password"
                type="password"
                help={
                  "lower and upper case letters, number and special character" as TranslatedString
                }
                required
              />
            </div>
            <div class="mb-4">
              <Form.InputLine
                label={"Repeat password" as TranslatedString}
                name="repeat"
                type="password"
                required
              />
            </div>

            <div class="mt-8">
              <button
                type="submit"
                class="flex w-full justify-center rounded-md bg-indigo-600 px-3 py-1.5 text-sm font-semibold leading-6 text-white shadow-sm hover:bg-indigo-500 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-indigo-600"
              >
                Create
              </button>
            </div>
          </Form.Provider>
        </div>
      </div>
    </div>
  );
}

function UnlockAccount({
  lockedAccount,
  onAccountUnlocked,
}: {
  lockedAccount: LockedAccount;
  onAccountUnlocked: (password: string) => void;
}): VNode {
  const Form = createNewForm<{
    password: string;
  }>();

  return (
    <div class="flex min-h-full flex-col ">
      <div class="sm:mx-auto sm:w-full sm:max-w-md">
        <h2 class="mt-6 text-center text-2xl font-bold leading-9 tracking-tight text-gray-900">
          Account locked
        </h2>
        <p class="mt-6 text-lg leading-8 text-gray-600">
          Your account is normally locked anytime you reload. To unlock type
          your password again.
        </p>
      </div>

      <div class="mt-10 sm:mx-auto sm:w-full sm:max-w-[480px] ">
        <div class="bg-gray-100 px-6 py-6 shadow sm:rounded-lg sm:px-12">
          <Form.Provider
            onSubmit={async (v) => {
              try {
                // test login
                await unlockAccount(lockedAccount, v.password);

                onAccountUnlocked(v.password ?? "");
                notifyInfo("Account unlocked" as TranslatedString);
              } catch (e) {
                if (e instanceof UnwrapKeyError) {
                  notifyError(
                    "Could not unlock account" as any,
                    e.message as any,
                  );
                } else {
                  throw e;
                }
              }
            }}
          >
            <div class="mb-4">
              <Form.InputLine
                label={"Password" as TranslatedString}
                name="password"
                type="password"
                required
              />
            </div>

            <div class="mt-8">
              <button
                type="submit"
                class="flex w-full justify-center rounded-md bg-indigo-600 px-3 py-1.5 text-sm font-semibold leading-6 text-white shadow-sm hover:bg-indigo-500 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-indigo-600"
              >
                Unlock
              </button>
            </div>
          </Form.Provider>
        </div>
      </div>
    </div>
  );
}