import { useCallback, useEffect, useMemo, useState } from 'react';
import List from '@mui/material/List';
import ListItem from '@mui/material/ListItem';
import ListItemButton from '@mui/material/ListItemButton';
import ListItemIcon from '@mui/material/ListItemIcon';
import ListItemText from '@mui/material/ListItemText';
import moment from 'moment';
import { Box, ButtonBase, Collapse, Typography, useTheme } from '@mui/material';
import { getBaseApiReact } from '../../App';
import MailIcon from '@mui/icons-material/Mail';
import MailOutlineIcon from '@mui/icons-material/MailOutline';
import { executeEvent } from '../../utils/events';
import { CustomLoader } from '../../common/CustomLoader';
import { mailsAtom, qMailLastEnteredTimestampAtom } from '../../atoms/global';
import ExpandMoreIcon from '@mui/icons-material/ExpandMore';
import ExpandLessIcon from '@mui/icons-material/ExpandLess';
import MarkEmailUnreadIcon from '@mui/icons-material/MarkEmailUnread';
import { useAtom } from 'jotai';
import { useTranslation } from 'react-i18next';

export const isLessThanOneWeekOld = (timestamp) => {
  // Current time in milliseconds
  const now = Date.now();

  // One week ago in milliseconds (7 days * 24 hours * 60 minutes * 60 seconds * 1000 milliseconds)
  const oneWeekAgo = now - 7 * 24 * 60 * 60 * 1000;

  // Check if the timestamp is newer than one week ago
  return timestamp > oneWeekAgo;
};

export function formatEmailDate(timestamp: number) {
  const date = moment(timestamp);
  const now = moment();

  if (date.isSame(now, 'day')) {
    // If the email was received today, show the time
    return date.format('h:mm A');
  } else if (date.isSame(now, 'year')) {
    // If the email was received this year, show the month and day
    return date.format('MMM D');
  } else {
    // For older emails, show the full date
    return date.format('MMM D, YYYY');
  }
}

export const QMailMessages = ({ userName, userAddress }) => {
  const [isExpanded, setIsExpanded] = useState(false);
  const [mails, setMails] = useAtom(mailsAtom);
  const [lastEnteredTimestamp, setLastEnteredTimestamp] = useAtom(
    qMailLastEnteredTimestampAtom
  );

  const [loading, setLoading] = useState(true);
  const theme = useTheme();
  const { t } = useTranslation(['core', 'group']);

  const getMails = useCallback(async () => {
    try {
      setLoading(true);
      const query = `qortal_qmail_${userName.slice(
        0,
        20
      )}_${userAddress.slice(-6)}_mail_`;
      const response = await fetch(
        `${getBaseApiReact()}/arbitrary/resources/search?service=MAIL_PRIVATE&query=${query}&limit=10&includemetadata=false&offset=0&reverse=true&excludeblocked=true&mode=ALL`
      );
      const mailData = await response.json();

      setMails(mailData);
    } catch (error) {
      console.error(error);
    } finally {
      setLoading(false);
    }
  }, []);

  const getTimestamp = async () => {
    try {
      return new Promise((res, rej) => {
        window
          .sendMessage('getEnteredQmailTimestamp')
          .then((response) => {
            if (!response?.error) {
              if (response?.timestamp) {
                setLastEnteredTimestamp(response?.timestamp);
              }
            }
            rej(response.error);
          })
          .catch((error) => {
            rej(
              error.message ||
                t('core:message.error.generic', {
                  postProcess: 'capitalizeFirst',
                })
            );
          });
      });
    } catch (error) {
      console.log(error);
    }
  };

  useEffect(() => {
    getTimestamp();
    if (!userName || !userAddress) return;
    getMails();

    const interval = setInterval(() => {
      getTimestamp();
      getMails();
    }, 300000);

    return () => clearInterval(interval);
  }, [getMails, userName, userAddress]);

  const anyUnread = useMemo(() => {
    let unread = false;

    mails.forEach((mail) => {
      if (
        (!lastEnteredTimestamp && isLessThanOneWeekOld(mail?.created)) ||
        (lastEnteredTimestamp &&
          isLessThanOneWeekOld(mail?.created) &&
          lastEnteredTimestamp < mail?.created)
      ) {
        unread = true;
      }
    });
    return unread;
  }, [mails, lastEnteredTimestamp]);

  return (
    <Box
      sx={{
        alignItems: 'center',
        display: 'flex',
        flexDirection: 'column',
        width: '100%',
      }}
    >
      <ButtonBase
        sx={{
          display: 'flex',
          flexDirection: 'row',
          gap: '10px',
          justifyContent: 'flex-start',
          padding: '0px 20px',
          width: '322px',
        }}
        onClick={() => setIsExpanded((prev) => !prev)}
      >
        <Typography
          sx={{
            fontSize: '1rem',
          }}
        >
          {t('group:latest_mails', { postProcess: 'capitalizeFirst' })}
        </Typography>

        <MarkEmailUnreadIcon
          sx={{
            color: anyUnread
              ? theme.palette.other.unread
              : theme.palette.text.primary,
          }}
        />
        {isExpanded ? (
          <ExpandLessIcon
            sx={{
              marginLeft: 'auto',
            }}
          />
        ) : (
          <ExpandMoreIcon
            sx={{
              color: anyUnread
                ? theme.palette.other.unread
                : theme.palette.text.primary,
              marginLeft: 'auto',
            }}
          />
        )}
      </ButtonBase>

      <Collapse in={isExpanded} timeout="auto" unmountOnExit>
        <Box
          className="scrollable-container"
          sx={{
            bgcolor: theme.palette.background.paper,
            borderRadius: '19px',
            display: 'flex',
            flexDirection: 'column',
            height: '250px',
            overflow: 'auto',
            padding: '20px',
            width: '322px',
          }}
        >
          {loading && mails.length === 0 && (
            <Box
              sx={{
                display: 'flex',
                justifyContent: 'center',
                width: '100%',
              }}
            >
              <CustomLoader />
            </Box>
          )}
          {!loading && mails.length === 0 && (
            <Box
              sx={{
                alignItems: 'center',
                display: 'flex',
                height: '100%',
                justifyContent: 'center',
                width: '100%',
              }}
            >
              <Typography
                sx={{
                  fontSize: '11px',
                  fontWeight: 400,
                  color: theme.palette.primary,
                }}
              >
                {t('group:message.generic.no_display', {
                  postProcess: 'capitalizeFirst',
                })}
              </Typography>
            </Box>
          )}

          <List sx={{ width: '100%', maxWidth: 360 }}>
            {mails?.map((mail) => {
              return (
                <ListItem
                  disablePadding
                  sx={{
                    marginBottom: '20px',
                  }}
                  onClick={() => {
                    executeEvent('addTab', {
                      data: { service: 'APP', name: 'q-mail' },
                    });
                    executeEvent('open-apps-mode', {});
                    setLastEnteredTimestamp(Date.now());
                  }}
                >
                  <ListItemButton
                    sx={{
                      padding: '0px',
                    }}
                    disableRipple
                    role={undefined}
                    dense
                  >
                    <ListItemText
                      sx={{
                        '& .MuiTypography-root': {
                          fontSize: '13px',
                          fontWeight: 400,
                        },
                      }}
                      primary={`From: ${mail?.name}`}
                      secondary={`${formatEmailDate(mail?.created)}`}
                    />
                    <ListItemIcon
                      sx={{
                        justifyContent: 'flex-end',
                      }}
                    >
                      {!lastEnteredTimestamp &&
                      isLessThanOneWeekOld(mail?.created) ? (
                        <MailIcon
                          sx={{
                            color: theme.palette.other.unread,
                          }}
                        />
                      ) : !lastEnteredTimestamp ? (
                        <MailOutlineIcon
                          sx={{
                            color: theme.palette.text.primary,
                          }}
                        />
                      ) : lastEnteredTimestamp < mail?.created &&
                        isLessThanOneWeekOld(mail?.created) ? (
                        <MailIcon
                          sx={{
                            color: theme.palette.other.unread,
                          }}
                        />
                      ) : (
                        <MailOutlineIcon
                          sx={{
                            color: theme.palette.text.primary,
                          }}
                        />
                      )}
                    </ListItemIcon>
                  </ListItemButton>
                </ListItem>
              );
            })}
          </List>
        </Box>
      </Collapse>
    </Box>
  );
};