import { PureComponent } from 'react';
import Avatar from '@mui/material/Avatar';
import Badge from '@mui/material/Badge';
import Box from '@mui/material/Box';
import IconButton from '@mui/material/IconButton';
import Menu from '@mui/material/Menu';
import MenuItem from '@mui/material/MenuItem';
import ListItemIcon from '@mui/material/ListItemIcon';
import ListItemText from '@mui/material/ListItemText';
import LogoutIcon from '@mui/icons-material/Logout';
import SettingsIcon from '@mui/icons-material/Settings';
import HelpOutlineRoundedIcon from '@mui/icons-material/HelpOutlineRounded';
import SystemUpdateAltIcon from '@mui/icons-material/SystemUpdateAlt';
import Switch from '@mui/material/Switch';
import Divider from '@mui/material/Divider';
import authAutomat, { bootstrapAuthMe } from '../automats/authAutomat';
import { helpAutomat, toggleHelp, pwaAutomat, openPwaDialog } from '../automats';
import SettingsDialog from './settings/SettingsDialog';
import { notifyError } from '../utils/notify';

class UserMenu extends PureComponent {
  constructor(props) {
    super(props);
    this.state = {
      anchorEl: null,
      settingsOpen: false,
      user: authAutomat.state.user,
      helpEnabled: helpAutomat.state?.enabled ?? false,
      pwaUpdateAvailable: pwaAutomat.state.needRefresh,
    };
    this.handleOpenMenu = this.handleOpenMenu.bind(this);
    this.handleContextMenu = this.handleContextMenu.bind(this);
    this.handleCloseMenu = this.handleCloseMenu.bind(this);
    this.handleOpenSettings = this.handleOpenSettings.bind(this);
    this.handleCloseSettings = this.handleCloseSettings.bind(this);
    this.handleToggleHelp = this.handleToggleHelp.bind(this);
    this.handleOpenPwaUpdate = this.handleOpenPwaUpdate.bind(this);
    this.handleLogout = this.handleLogout.bind(this);
  }

  componentDidMount() {
    this.unsubscribeAuth = authAutomat.subscribe(this, 'user');
    this.unsubscribeHelp = helpAutomat.subscribe(this, (state) => ({
      helpEnabled: Boolean(state?.enabled),
    }));
    this.unsubscribePwa = pwaAutomat.subscribe(this, (state) => ({
      pwaUpdateAvailable: Boolean(state?.needRefresh),
    }));
  }

  componentWillUnmount() {
    this.unsubscribeAuth?.();
    this.unsubscribeHelp?.();
    this.unsubscribePwa?.();
  }

  handleOpenPwaUpdate() {
    this.setState({ anchorEl: null });
    openPwaDialog();
  }

  handleOpenMenu(event) {
    this.setState({ anchorEl: event.currentTarget });
  }

  handleContextMenu(event) {
    event?.preventDefault?.();
    this.setState({ anchorEl: event.currentTarget });
  }

  handleCloseMenu() {
    this.setState({ anchorEl: null });
  }

  handleOpenSettings() {
    this.setState({ anchorEl: null, settingsOpen: true });
  }

  handleCloseSettings() {
    this.setState({ settingsOpen: false });
  }

  handleToggleHelp(e) {
    e?.preventDefault?.();
    e?.stopPropagation?.();
    toggleHelp();
  }

  async handleLogout() {
    this.setState({ anchorEl: null });
    try {
      await authAutomat.actions.logout();
      await bootstrapAuthMe();
    } catch (err) {
      notifyError(err);
    }
  }

  render() {
    const { user, anchorEl, settingsOpen, helpEnabled, pwaUpdateAvailable } = this.state;
    const open = Boolean(anchorEl);

    const pictureSrc = (() => {
      const pic = user?.picture;
      if (!pic || typeof pic !== 'string') return undefined;
      if (pic.startsWith('http://') || pic.startsWith('https://') || pic.startsWith('data:')) {
        return pic;
      }
      const mime = pic.startsWith('/9j/') ? 'image/jpeg' : 'image/png';
      return `data:${mime};base64,${pic}`;
    })();

    return (
      <>
        <Box sx={{ px: 1.5, py: 1.5, alignSelf: 'flex-start' }}>
          <IconButton
            onClick={this.handleOpenMenu}
            onContextMenu={this.handleContextMenu}
            onMouseDown={(e) => {
              if (e.button === 0) e.preventDefault();
            }}
            sx={{ p: 0, width: 32, height: 32, borderRadius: '50%' }}
          >
            <Badge
              color="primary"
              variant="dot"
              invisible={!pwaUpdateAvailable}
              overlap="circular"
              anchorOrigin={{ vertical: 'top', horizontal: 'right' }}
            >
              <Avatar src={pictureSrc} alt={user?.email} sx={{ width: 32, height: 32 }}>
                {user?.email?.[0]?.toUpperCase()}
              </Avatar>
            </Badge>
          </IconButton>
        </Box>
        <Menu
          anchorEl={anchorEl}
          open={open}
          onClose={this.handleCloseMenu}
          anchorOrigin={{ vertical: 'top', horizontal: 'left' }}
          transformOrigin={{ vertical: 'bottom', horizontal: 'left' }}
        >
          {pwaUpdateAvailable && (
            <MenuItem onClick={this.handleOpenPwaUpdate} sx={{ bgcolor: 'action.hover' }}>
              <ListItemIcon>
                <SystemUpdateAltIcon fontSize="small" color="primary" />
              </ListItemIcon>
              <ListItemText
                primary="Update verfügbar"
                secondary="Jetzt aktualisieren"
                primaryTypographyProps={{ fontWeight: 600, color: 'primary.main' }}
              />
            </MenuItem>
          )}
          <MenuItem disabled>{user?.email}</MenuItem>
          <MenuItem disabled={!user?.selectedCompanyId} onClick={this.handleOpenSettings}>
            <ListItemIcon>
              <SettingsIcon fontSize="small" />
            </ListItemIcon>
            <ListItemText>Einstellungen</ListItemText>
          </MenuItem>
          <MenuItem onClick={this.handleToggleHelp}>
            <ListItemIcon>
              <HelpOutlineRoundedIcon fontSize="small" />
            </ListItemIcon>
            <ListItemText>Hilfe</ListItemText>
            <Switch
              edge="end"
              size="small"
              checked={helpEnabled}
              sx={{ pointerEvents: 'none' }}
            />
          </MenuItem>
          <Divider />
          <MenuItem onClick={this.handleLogout}>
            <ListItemIcon>
              <LogoutIcon fontSize="small" />
            </ListItemIcon>
            <ListItemText>Sign out</ListItemText>
          </MenuItem>
        </Menu>
        <SettingsDialog open={settingsOpen} onClose={this.handleCloseSettings} />
      </>
    );
  }
}

export default UserMenu;