import React, { useState, useEffect } from 'react';
import {
  Box,
  Typography,
  Button,
  useTheme,
  useMediaQuery,
  CircularProgress,
} from '@mui/material';
import { useTranslation } from 'react-i18next';
import { DeviceMessage, Logout } from 'iconsax-react';
import { CardContainer } from '@/components/CardContainer';
import { PageWrapper } from '../components/PageWrapper';
import { Icon } from '@rkheftan/harmony-ui';
import { fetchProfile, deleteSessions } from '../api/settingsApi';
import { type ApiSession } from '../types/settingsApiType';
import { useApi } from '@/hooks/useApi';
import { formatDate } from '@/utils/formatSessionDate';
import { type Device } from '../types/settingsType';
import { useToast } from '@rkheftan/harmony-ui';

export function ActiveDevicesPage() {
  const { t, i18n } = useTranslation('setting');
  const [devices, setDevices] = useState<Device[]>([]);
  const [loadingDeleteIds, setLoadingDeleteIds] = useState<string[]>([]);
  const theme = useTheme();
  const isXsup = useMediaQuery(theme.breakpoints.up('xs'));
  const showToast = useToast();

  const {
    data: profileData,
    loading: isLoading,
    error: fetchError,
  } = useApi(fetchProfile, { immediate: true });

  const {
    data: terminateData,
    loading: isTerminating,
    execute: executeTerminateAll,
  } = useApi(deleteSessions);

  useEffect(() => {
    if (profileData?.success && profileData.activeSessions) {
      const { sessions, currentKey } = profileData.activeSessions;
      const formattedDevices = sessions.map((session: ApiSession) => ({
        id: session.key,
        timeAndDate: formatDate(session.created, i18n.language, t),
        deviceModel: `${session.deviceOs} ${session.deviceName}`,
        ip: session.ipAddress,
        current: session.key === currentKey,
      }));

      const sortedDevices = formattedDevices.sort((a, b) => {
        if (a.current && !b.current) return -1;
        if (!a.current && b.current) return 1;
        return 0;
      });

      setDevices(sortedDevices);
    }
  }, [profileData, i18n.language, t]);

  useEffect(() => {
    if (terminateData?.success) {
      setDevices((prev) => prev.filter((d) => d.current));
    }
  }, [terminateData]);

  const handleDeleteDevice = async (id: string) => {
    if (loadingDeleteIds.includes(id)) return;
    setLoadingDeleteIds((prev) => [...prev, id]);
    try {
      const { data } = await deleteSessions({ keys: [id] });
      if (data.success) {
        setDevices((prevDevices) => prevDevices.filter((d) => d.id !== id));
        showToast({ message: t('active.successDelete'), severity: 'success' });
      } else {
        showToast({
          message: data.message || t('active.deleteFailed'),
          severity: 'error',
        });
      }
    } catch (error: unknown) {
      showToast({
        message: t('active.deleteFailed'),
        severity: 'error',
      });
    } finally {
      setLoadingDeleteIds((prev) =>
        prev.filter((loadingId) => loadingId !== id),
      );
    }
  };

  const handleTerminateAllOtherSessions = () => {
    const otherSessionKeys = devices.filter((d) => !d.current).map((d) => d.id);
    if (otherSessionKeys.length > 0) {
      executeTerminateAll({ keys: otherSessionKeys });
    }
  };

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

  return (
    <PageWrapper>
      <CardContainer
        title={t('active.activeDevices')}
        subtitle={t('active.activeDevicesCaption')}
        action={
          <Button
            size="medium"
            variant="outlined"
            onClick={handleTerminateAllOtherSessions}
            sx={{
              borderRadius: 1,
              borderColor: 'error.main',
              color: 'error.main',
              textTransform: 'none',
              flexShrink: 0,
              flexGrow: 0,
              width: 'auto',
            }}
            disabled={isLoading || isTerminating}
          >
            {isTerminating
              ? t('active.deleting')
              : t('active.deleteDevicesButton')}
          </Button>
        }
      >
        {isLoading ? (
          <Box
            sx={{
              display: 'flex',
              justifyContent: 'center',
              alignItems: 'center',
              p: 4,
              minHeight: '200px',
            }}
          >
            <CircularProgress />
          </Box>
        ) : fetchError ? (
          <Box sx={{ textAlign: 'center', p: 4 }}>
            <Typography color="error.main">
              {getErrorMessage(fetchError)}
            </Typography>
          </Box>
        ) : (
          <Box
            sx={{
              px: { xs: 2, sm: 3, md: 4 },
              py: 2,
              display: 'flex',
              flexDirection: 'column',
            }}
          >
            {devices.map((device) => (
              <React.Fragment key={device.id}>
                <Box
                  sx={{
                    display: 'flex',
                    flexDirection: { xs: 'column', sm: 'row' },
                    alignItems: { xs: 'flex-start', sm: 'center' },
                    minHeight: 50,
                    py: 1.5,
                  }}
                >
                  <Typography
                    variant="body2"
                    sx={{
                      flexBasis: { xs: '100%', sm: 'auto' },
                      mb: { xs: 1, sm: 0 },
                      minWidth: { sm: '138px' },
                      order: { xs: 1, sm: 1 },
                    }}
                  >
                    {device.timeAndDate}
                  </Typography>

                  <Box
                    sx={{
                      display: 'flex',
                      alignItems: 'center',
                      gap: 1,
                      width: '100%',
                      order: { xs: 2, sm: 2 },
                    }}
                  >
                    <Icon
                      Component={DeviceMessage}
                      size="medium"
                      color="primary.main"
                    />
                    <Typography variant="body2" noWrap>
                      {device.deviceModel}
                    </Typography>
                  </Box>

                  <Typography
                    variant="body2"
                    sx={{
                      flexBasis: { xs: '100%', sm: 'auto' },
                      mb: { xs: 1, sm: 0 },
                      minWidth: { sm: '138px' },
                      order: { xs: 3, sm: 3 },
                    }}
                  >
                    {device.ip}
                  </Typography>

                  <Box
                    sx={{
                      flexBasis: { xs: '100%', sm: 'auto' },
                      mb: { xs: 1, sm: 0 },
                      minWidth: { sm: '138px' },
                      order: { xs: 4, sm: 4 },
                      alignItems: 'center',
                      justifyContent: 'center',
                    }}
                  >
                    {device.current && (
                      <Button
                        variant="outlined"
                        size="medium"
                        sx={{
                          borderRadius: 12.5,
                          border: '1px solid',
                          borderColor: 'success.main',
                          whiteSpace: 'nowrap',
                          color: 'success.main',
                          textTransform: 'none',
                          maxWidth: '125px',
                          '&.Mui-disabled': {
                            color: 'success.main',
                            borderColor: 'success.main',
                          },
                        }}
                        disabled
                      >
                        {t('active.currentDevice')}
                      </Button>
                    )}
                  </Box>

                  <Box
                    sx={{
                      flexBasis: { xs: '100%', sm: 'auto' },
                      mb: { xs: 1, sm: 0 },
                      textAlign: { xs: 'left', sm: 'center' },
                      minWidth: { sm: '138px' },
                      order: { xs: 5, sm: 5 },
                    }}
                  >
                    <Button
                      size="small"
                      variant="outlined"
                      startIcon={<Icon Component={Logout} size="small" />}
                      disabled={
                        device.current || loadingDeleteIds.includes(device.id)
                      }
                      onClick={() => handleDeleteDevice(device.id)}
                      sx={{
                        color: 'error.main',
                        borderRadius: 1,
                        borderColor: 'error.main',
                        display: 'flex',
                        alignItems: 'center',
                        justifyContent: 'center',
                        whiteSpace: 'nowrap',
                        textTransform: 'none',
                        '& .MuiButton-startIcon': {
                          marginRight: 0.5,
                          marginLeft: 0,
                        },
                      }}
                    >
                      {loadingDeleteIds.includes(device.id) ? (
                        <CircularProgress size={20} color="error" />
                      ) : (
                        t('active.deleteDevice')
                      )}
                    </Button>
                  </Box>
                </Box>
                {isXsup && (
                  <Box sx={{ borderBottom: 1, borderColor: 'divider' }} />
                )}
              </React.Fragment>
            ))}
          </Box>
        )}
      </CardContainer>
    </PageWrapper>
  );
}