import { useState, useEffect, useMemo } from 'react';
import { useTranslation } from 'react-i18next';
import { CardContainer } from '@/components/CardContainer';
import { PageWrapper } from '../PageWrapper';
import SocialMediaList from './socialMedia/SocialMediaList';
import SocialMediaMenu from './socialMedia/SocialMediaMenu';
import SocialMediaDialog from './socialMedia/SocialMediaDialog';
import useMediaQuery from '@mui/material/useMediaQuery';
import type { Theme } from '@mui/material/styles';
import { Box, CircularProgress, Typography } from '@mui/material';
import { useManualApi } from '@/hooks/useApi';
import {
  fetchProfile,
  sendEmailCode,
  confirmEmailCode,
  changeEmail,
} from '../../api/settingsApi';

interface EmailAccount {
  email: string;
  provider: 'email' | 'google';
  time: string;
}

export function SocialMedia() {
  const { t } = useTranslation('setting');

  const [openDialog, setOpenDialog] = useState(false);
  const [emailInput, setEmailInput] = useState('');
  const [verificationCode, setVerificationCode] = useState('');
  const [dialogStep, setDialogStep] = useState<'enterEmail' | 'enterCode'>(
    'enterEmail',
  );
  const [emailList, setEmailList] = useState<EmailAccount[]>([]);
  const [formError, setFormError] = useState<string | null>(null);

  const {
    data: profileData,
    loading: isFetching,
    error: fetchError,
    execute: executeFetchProfile,
  } = useManualApi(fetchProfile);

  const {
    data: sendCodeData,
    loading: isSendingCode,
    error: sendCodeError,
    execute: executeSendCode,
  } = useManualApi(sendEmailCode);

  const {
    data: confirmData,
    loading: isConfirming,
    error: confirmError,
    execute: executeConfirmCode,
  } = useManualApi(confirmEmailCode);

  const {
    data: changeEmailData,
    loading: isChangingEmail,
    error: changeEmailError,
    execute: executeChangeEmail,
  } = useManualApi(changeEmail);

  const fullScreen = useMediaQuery((theme: Theme) =>
    theme.breakpoints.down('sm'),
  );
  const downMd = useMediaQuery((theme: Theme) => theme.breakpoints.down('md'));
  const computedMaxWidth = (fullScreen ? 'xs' : downMd ? 'sm' : 'md') as
    | 'xs'
    | 'sm'
    | 'md'
    | 'lg'
    | 'xl';

  useEffect(() => {
    executeFetchProfile();
  }, []);

  useEffect(() => {
    if (profileData?.success && profileData.email) {
      const { email } = profileData;
      setEmailList([
        {
          email,
          provider: email.includes('@gmail.') ? 'google' : 'email',
          time: '',
        },
      ]);
    }
  }, [profileData]);

  useEffect(() => {
    if (sendCodeData?.success) {
      setDialogStep('enterCode');
    }
  }, [sendCodeData]);

  useEffect(() => {
    if (confirmData?.success && confirmData.confirm) {
      executeChangeEmail({ email: emailInput });
    }
  }, [confirmData, emailInput, executeChangeEmail]);

  useEffect(() => {
    if (changeEmailData?.success) {
      setEmailList((prev) => [
        ...prev,
        {
          email: emailInput,
          provider: emailInput.includes('@gmail.') ? 'google' : 'email',
          time: t('settingForm.justNow'),
        },
      ]);
      resetDialog();
    }
  }, [changeEmailData, emailInput, t]);

  const resetDialog = () => {
    setOpenDialog(false);
    setEmailInput('');
    setVerificationCode('');
    setFormError(null);
    setDialogStep('enterEmail');
  };

  const handleSendCode = () => {
    if (!/^\S+@\S+\.\S+$/.test(emailInput)) {
      setFormError(t('settingForm.emailIsInvalid'));
      return;
    }
    setFormError(null);
    executeSendCode({ email: emailInput });
  };

  const handleConfirmAndChangeEmail = () => {
    if (verificationCode.length < 4) {
      setFormError(t('settingForm.verificationCodeRequired'));
      return;
    }
    setFormError(null);
    executeConfirmCode({ email: emailInput, verifyCode: verificationCode });
  };

  const getErrorMessage = (error: unknown): string | null => {
    if (!error) return null;
    if (error instanceof Error) return error.message;
    return String(error);
  };

  const apiError = useMemo(
    () => getErrorMessage(sendCodeError || confirmError || changeEmailError),
    [sendCodeError, confirmError, changeEmailError],
  );

  return (
    <PageWrapper>
      <CardContainer
        title={t('settingForm.titleSocial')}
        subtitle={t('settingForm.descriptionSocial')}
        action={
          <SocialMediaMenu t={t} onOpenDialog={() => setOpenDialog(true)} />
        }
      >
        {isFetching ? (
          <Box
            sx={{
              display: 'flex',
              justifyContent: 'center',
              alignItems: 'center',
              p: 4,
              minHeight: '100px',
            }}
          >
            <CircularProgress />
          </Box>
        ) : fetchError ? (
          <Box sx={{ textAlign: 'center', p: 4 }}>
            <Typography color="error.main">
              {getErrorMessage(fetchError)}
            </Typography>
          </Box>
        ) : (
          <SocialMediaList t={t} emailList={emailList} />
        )}
        <SocialMediaDialog
          open={openDialog}
          onClose={resetDialog}
          t={t}
          emailInput={emailInput}
          setEmailInput={setEmailInput}
          verificationCode={verificationCode}
          setVerificationCode={setVerificationCode}
          apiError={formError || apiError}
          isLoading={isSendingCode || isConfirming || isChangingEmail}
          dialogStep={dialogStep}
          onSendCode={handleSendCode}
          onConfirmEmail={handleConfirmAndChangeEmail}
          fullScreen={fullScreen}
          computedMaxWidth={computedMaxWidth}
        />
      </CardContainer>
    </PageWrapper>
  );
}