import { PureComponent, createRef } from 'react';
import Box from '@mui/material/Box';
import Button from '@mui/material/Button';
import CircularProgress from '@mui/material/CircularProgress';
import BackendError from '../../components/BackendError';
import SingleLineTextEdit from 'dashgui/SingleLineTextEdit';
import FillSpace from 'dashgui/FillSpace';
import { PanelTile, PanelTileGrid } from 'dashgui/panels';
import { backendErrorFrom } from '../../utils/backendError';
import { notifyError } from '../../utils/notify';
import { setLastArticleSku } from '../../automats';
import brandAutomat from '../../automats/brandAutomat';
import { enqueueSnackbar } from 'notistack';
import {
  ArtikelMarke,
  ArtikelMarkeNew,
} from '../../components/brand';
import {
  PURPLE_PANEL,
} from '../../colors';

class ArtikelMarkenSearchField extends PureComponent {
  constructor(props) {
    super(props);
    this.state = {
      input: brandAutomat.state.filter ?? '',
      submitting: false,
    };
    this.handleSubmit = this.handleSubmit.bind(this);
  }

  componentDidMount() {
    this.unsub = brandAutomat.subscribe(this, (state) => ({
      input: state.filter,
    }));
  }

  componentWillUnmount() {
    this.unsub?.();
  }

  onInputChange(input) {
    this.setState({ input });
    brandAutomat.actions.filter(input);
  }

  async handleSubmit() {
    const name = this.state.input.trim();
    if (!name || this.state.submitting) return;

    this.setState({ submitting: true });
    try {
      const row = await brandAutomat.actions.create({ name });
      enqueueSnackbar(`Marke „${row.name || name}“ angelegt.`, { variant: 'success' });
      this.setState({ input: '', submitting: false });
      brandAutomat.actions.filter('');
    } catch (err) {
      this.setState({ submitting: false });
      notifyError(err);
    }
  }

  render() {
    const { inputRef } = this.props;
    const { input, submitting } = this.state;
    const canSubmit = Boolean(input.trim()) && !submitting;

    return (
      <PanelTileGrid>
        <Box
          ref={inputRef}
          sx={{
            gridColumn: {
              xs: '1 / -1',
              sm: 'span 2',
              md: 'span 2',
            },
            display: 'flex',
            alignItems: 'center',
            gap: 1,
            pb: 2,
          }}
        >
          <SingleLineTextEdit
            sx={{ flex: 1 }}
            size="small"
            search
            clear
            value={input}
            disabled={submitting}
            onChange={(next) => this.onInputChange(next)}
          />
          <Button
            variant="contained"
            disabled={!canSubmit}
            onClick={() => void this.handleSubmit()}
          >
            Hinzufügen
          </Button>
        </Box>
      </PanelTileGrid>
    );
  }
}

class ArtikelMarkenPage extends PureComponent {
  constructor(props) {
    super(props);
    this.state = {
      status: brandAutomat.state.status,
      error: brandAutomat.state.error ? backendErrorFrom({ message: brandAutomat.state.error }) : null,
      brands: brandAutomat.state.filteredBrands ?? brandAutomat.state.brands,
      totalCount: brandAutomat.state.brands?.length ?? 0,
    };
    this.searchRef = createRef();
    this.handleRetry = this.handleRetry.bind(this);
  }

  componentDidMount() {
    setLastArticleSku(null);

    this.unsub = brandAutomat.subscribe(this, (state) => ({
      brands: state.filteredBrands,
      totalCount: state.brands?.length ?? 0,
      status: state.status,
      error: state.error ? backendErrorFrom({ message: state.error }) : null,
    }));
  }

  componentWillUnmount() {
    this.unsub?.();
  }

  handleRetry() {
    void brandAutomat.actions.load().catch((err) => notifyError(err));
  }

  render() {
    const { status, error, brands } = this.state;

    if (status === 'loading' || status === 'idle') {
      return (
        <Box sx={{ display: 'flex', justifyContent: 'center', py: 6 }}>
          <CircularProgress />
        </Box>
      );
    }

    if (status === 'failed') {
      return <BackendError error={error} onRetry={this.handleRetry} />;
    }

    return (
      <>
        <ArtikelMarkenSearchField inputRef={this.searchRef} />
        <PanelTileGrid>
          <PanelTile wide={2} minHeight={0} color={PURPLE_PANEL} sx={{ pb: 0 }}>
            <FillSpace
              aboveRef={[this.searchRef]}
              reserveBottom={32}
              minPageSize={8}
              minHeight={0}
              items={brands}
              totalCount={this.state.totalCount}
              renderItem={ArtikelMarke}
            />
          </PanelTile>
        </PanelTileGrid>
      </>
    );
  }
}

export { ArtikelMarke, ArtikelMarkeNew, ArtikelMarkenSearchField };
export default ArtikelMarkenPage;