import { PureComponent } from 'react';
import Box from '@mui/material/Box';
import Chip from '@mui/material/Chip';
import IconButton from '@mui/material/IconButton';
import ListItem from '@mui/material/ListItem';
import DeleteOutlinedIcon from '@mui/icons-material/DeleteOutlined';
import DragIndicatorIcon from '@mui/icons-material/DragIndicator';
import SingleLineTextEdit from 'dashgui/SingleLineTextEdit';
import { enqueueSnackbar } from 'notistack';
import companyAutomat from '../../automats/companyAutomat';
import { notifyError } from '../../utils/notify';

class ArtikelMerkmalWert extends PureComponent {
  constructor(props) {
    super(props);
    const item = props.item ?? props.value;
    this.state = {
      draft: item?.value ?? '',
      busy: false,
    };
  }

  componentDidUpdate(prevProps) {
    const prevItem = prevProps.item ?? prevProps.value;
    const item = this.props.item ?? this.props.value;
    if (prevItem?.value !== item?.value) {
      this.setState({ draft: item?.value ?? '' });
    } else if (prevProps.disabled && !this.props.disabled) {
      if (this.state.draft !== item?.value) {
        this.setState({ draft: item?.value ?? '' });
      }
    }
  }

  handleChange = (next) => {
    this.setState({ draft: next });
    const item = this.props.item ?? this.props.value;
    this.props.onChange?.(next, item);
  };

  handleBlur = () => {
    const item = this.props.item ?? this.props.value;
    if (!item) return;
    const draft = this.state.draft.trim();
    if (!draft) {
      this.setState({ draft: item.value ?? '' });
      return;
    }
    if (draft !== item.value) {
      void this.renameValue(item, draft);
    }
  };

  async renameValue(item, val) {
    this.setState({ busy: true });
    try {
      await companyAutomat.actions.updateValue(item.id, { value: val });
      enqueueSnackbar('Wert gespeichert.', { variant: 'success' });
    } catch (err) {
      this.setState({ draft: item.value ?? '' });
      notifyError(err);
    } finally {
      this.setState({ busy: false });
    }
  }

  handleKeyDown = (event) => {
    const item = this.props.item ?? this.props.value;
    if (event.key === 'Enter') {
      event.preventDefault();
      event.target.blur();
    }
    if (event.key === 'Escape') {
      event.preventDefault();
      this.setState({ draft: item?.value ?? '' });
      event.target.blur();
    }
  };

  handleDelete = () => {
    const item = this.props.item ?? this.props.value;
    if (!item || this.props.disabled || this.state.busy) return;

    if (!window.confirm(`Wert „${item.value}“ wirklich löschen?`)) {
      return;
    }

    this.setState({ busy: true });
    void (async () => {
      try {
        await companyAutomat.actions.deleteValue(item.id);
        enqueueSnackbar('Wert gelöscht.', { variant: 'success' });
      } catch (err) {
        notifyError(err);
        this.setState({ busy: false });
      }
    })();
  };

  render() {
    const { disabled, sx } = this.props;
    const item = this.props.item ?? this.props.value;
    const { draft, busy } = this.state;
    const valText = item?.value ?? '';
    const isDisabled = disabled || busy;
    const articleCount = item?.articleCount ?? 0;

    return (
      <ListItem
        disableGutters
        data-id={item?.id}
        sx={{
          gap: 1,
          py: 0.75,
          alignItems: 'center',
          width: '100%',
          minWidth: 0,
          ...sx,
        }}
      >
        <Box
          className="drag-handle"
          sx={{
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
            width: 40,
            height: 40,
            flexShrink: 0,
            color: 'text.disabled',
            cursor: isDisabled ? 'default' : 'grab',
            userSelect: 'none',
            touchAction: 'none',
            '&:hover': isDisabled ? undefined : { color: 'text.secondary' },
            transition: 'color 0.15s',
          }}
        >
          <DragIndicatorIcon sx={{ fontSize: 24, pointerEvents: 'none' }} />
        </Box>

        <SingleLineTextEdit
          size="small"
          label=""
          value={draft}
          disabled={isDisabled || !item}
          onChange={this.handleChange}
          onBlur={this.handleBlur}
          onKeyDown={this.handleKeyDown}
          sx={{ flex: 1, minWidth: 0 }}
        />

        <Chip
          size="small"
          label={articleCount}
          sx={{
            height: 24,
            width: 52,
            minWidth: 52,
            maxWidth: 52,
            fontSize: '0.75rem',
            fontWeight: 600,
            fontVariantNumeric: 'tabular-nums',
            bgcolor: 'action.hover',
            color: articleCount > 0 ? 'text.primary' : 'text.disabled',
            flexShrink: 0,
            '& .MuiChip-label': {
              px: 0.5,
              textAlign: 'center',
              width: '100%',
            },
          }}
        />

        <IconButton
          aria-label={`„${valText}“ löschen`}
          disabled={isDisabled || !item}
          onClick={this.handleDelete}
          sx={{ width: 40, height: 40, flexShrink: 0 }}
        >
          <DeleteOutlinedIcon sx={{ fontSize: 24 }} />
        </IconButton>
      </ListItem>
    );
  }
}

export default ArtikelMerkmalWert;