import { Fragment, PureComponent } from 'react';
import { Link as RouterLink } from 'react-router-dom';
import Box from '@mui/material/Box';
import Button from '@mui/material/Button';
import Chip from '@mui/material/Chip';
import CircularProgress from '@mui/material/CircularProgress';
import IconButton from '@mui/material/IconButton';
import TableCell from '@mui/material/TableCell';
import TableRow from '@mui/material/TableRow';
import TextField from '@mui/material/TextField';
import Tooltip from '@mui/material/Tooltip';
import Typography from '@mui/material/Typography';
import DeleteOutlinedIcon from '@mui/icons-material/DeleteOutlined';
import HelpOutlineIcon from '@mui/icons-material/HelpOutlineOutlined';
import Inventory2OutlinedIcon from '@mui/icons-material/Inventory2Outlined';
import CheckCircleOutlineOutlinedIcon from '@mui/icons-material/CheckCircleOutlineOutlined';
import AddIcon from '@mui/icons-material/Add';
import SearchIcon from '@mui/icons-material/Search';
import LinkOffOutlinedIcon from '@mui/icons-material/LinkOffOutlined';
import { getFirstVal, parseNum, LINE_COLUMNS } from './manifestConfig';
import ArticlePhoto from '../article/ArticlePhoto';
import { formatPrice, grossFromNet } from '../../utils/price';
import { primaryPrice, priceBrutto } from '../../utils/articleDetail';
import artikelAutomat, { createArticleSelector, getArticle } from '../../automats/artikelAutomat';
import { artikelDetailPath } from '../article/articleRoute';
import { BrandLabel } from '../brand';
import { articleSupplierAutomat } from '../../automats/articleDetailAutomat';
import { selectCompanyTaxrate } from '../../automats/companyAutomat';
import {
  BORDER,
} from '../../colors';

class ManifestFormLine extends PureComponent {
  constructor(props) {
    super(props);
    const sku = this.getArticleSku(props);
    this.state = {
      cachedArticle: sku ? getArticle(sku) : null,
      loadingArticle: false,
      fallbackSuppliers: [],
    };
    this.handleRemove = this.handleRemove.bind(this);
    this.handleBlur = this.handleBlur.bind(this);
    this.handleCreateArticle = this.handleCreateArticle.bind(this);
    this.handleSearchArticle = this.handleSearchArticle.bind(this);
    this.handleRemoveSupplierArticle = this.handleRemoveSupplierArticle.bind(this);
  }

  getArticleSku(props = this.props) {
    if (props.kind === 'delivery') {
      return props.supplierArticle?.article?.sku || null;
    }
    return props.line?.sku ? String(props.line.sku).trim() : null;
  }

  componentDidMount() {
    this.subscribeArticle(this.getArticleSku());
  }

  componentDidUpdate(prevProps) {
    const prevSku = this.getArticleSku(prevProps);
    const nextSku = this.getArticleSku(this.props);
    if (prevSku !== nextSku) {
      this.subscribeArticle(nextSku);
    }
  }

  componentWillUnmount() {
    this.unsubArticle?.();
    this.unsubSupplier?.();
  }

  subscribeArticle(sku) {
    this.unsubArticle?.();
    this.unsubArticle = null;
    this.unsubSupplier?.();
    this.unsubSupplier = null;

    if (!sku) {
      if (this.state.cachedArticle || this.state.loadingArticle || this.state.fallbackSuppliers?.length) {
        this.setState({ cachedArticle: null, loadingArticle: false, fallbackSuppliers: [] });
      }
      return;
    }
    const current = getArticle(sku);
    if (current) {
      this.setState({ cachedArticle: current, loadingArticle: false });
    } else {
      this.setState({ cachedArticle: null, loadingArticle: true });
      artikelAutomat.actions.loadArticle(sku)
        .then((art) => {
          if (this.getArticleSku() === sku) {
            this.setState({ cachedArticle: art, loadingArticle: false });
          }
        })
        .catch(() => {
          if (this.getArticleSku() === sku) {
            this.setState({ cachedArticle: null, loadingArticle: false });
          }
        });
    }
    this.unsubArticle = artikelAutomat.subscribe(this, (state) => {
      const art = createArticleSelector(sku)(state);
      return {
        cachedArticle: art ?? null,
        ...(art ? { loadingArticle: false } : {}),
      };
    });

    // Fallback: subscribe to articleSupplierAutomat if cachedArticle doesn't have suppliers
    if (!current?.suppliers?.length) {
      const supKey = articleSupplierAutomat.key(sku);
      this.unsubSupplier = supKey.subscribe(this, (item) => ({
        fallbackSuppliers: Array.isArray(item?.data) ? item.data : [],
      }));
      void articleSupplierAutomat.load(sku).catch(() => {});
    }
  }

  handleRemove() {
    this.props.onRemove(this.props.line.key);
  }

  handleBlur(e, columnId) {
    if (columnId === 'sku' && this.props.onSkuBlur) {
      this.props.onSkuBlur(this.props.line.key, e.target.value);
    }
  }

  handleCreateArticle() {
    const { line, onCreateArticle } = this.props;
    if (onCreateArticle) {
      onCreateArticle(line);
    }
  }

  handleSearchArticle() {
    const { line, onSearchArticle } = this.props;
    if (onSearchArticle) {
      onSearchArticle(line);
    }
  }

  handleRemoveSupplierArticle() {
    const { line, supplierArticle, onRemoveSupplierArticle } = this.props;
    if (onRemoveSupplierArticle) {
      onRemoveSupplierArticle(line, supplierArticle);
    }
  }

  renderLedgerChip() {
    const { ledgerLine, onBookLine } = this.props;
    if (!ledgerLine) return null;
    const isBooked = ledgerLine.isBooked;
    const isPartial = !isBooked && ledgerLine.bookedAmount > 0;
    const isClickable = Boolean(onBookLine);

    return (
      <Tooltip
        title={
          isBooked
            ? `Vollständig im Lager gebucht: ${ledgerLine.bookedAmount} Stück (Klicken für Details)`
            : isPartial
              ? `Teilweise im Lager gebucht: ${ledgerLine.bookedAmount} von ${ledgerLine.targetAmount} Stück (Klicken zum Einbuchen dieser Position)`
              : `Noch nicht im Lager gebucht (${ledgerLine.targetAmount} Stück – Klicken zum Einbuchen dieser Position)`
        }
      >
        <Chip
          size="small"
          clickable={isClickable}
          onClick={
            isClickable
              ? (e) => {
                e.stopPropagation();
                onBookLine(ledgerLine);
              }
              : undefined
          }
          icon={
            isBooked ? (
              <CheckCircleOutlineOutlinedIcon sx={{ '&&': { fontSize: 13 } }} />
            ) : (
              <Inventory2OutlinedIcon sx={{ '&&': { fontSize: 13 } }} />
            )
          }
          label={
            isBooked
              ? `Lager: ${ledgerLine.bookedAmount} Stk. gebucht`
              : isPartial
                ? `Lager: ${ledgerLine.bookedAmount}/${ledgerLine.targetAmount} Stk.`
                : 'Lager: offen'
          }
          color={isBooked ? 'success' : isPartial ? 'warning' : 'default'}
          variant="outlined"
          sx={{
            height: 20,
            fontSize: '0.68rem',
            fontWeight: 600,
            cursor: isClickable ? 'pointer' : 'default',
            bgcolor: isBooked ? 'success.50' : undefined,
            '&:hover': isClickable
              ? {
                bgcolor: isBooked
                  ? 'success.100'
                  : isPartial
                    ? 'warning.100'
                    : 'action.hover',
              }
              : undefined,
          }}
        />
      </Tooltip>
    );
  }

  renderField(column, colIdx, totalCols) {
    const { id, align, type } = column;
    const { line, saving, onChange, columns } = this.props;

    if (id === 'pos') {
      const posVal =
        this.props.positionIndex ??
        (this.props.index != null ? this.props.index + 1 : colIdx + 1);
      return (
        <Box
          sx={{
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'center',
            height: '100%',
            minHeight: 38,
            fontWeight: 700,
            fontSize: '0.82rem',
            color: 'text.secondary',
            userSelect: 'none',
          }}
        >
          {posVal}
        </Box>
      );
    }

    let val = line[id];
    if (val == null || val === '') {
      if (id === 'name' && this.state.cachedArticle?.name) {
        val = this.state.cachedArticle.name;
      } else if (id === 'tax' || id === 'taxrate') {
        val = line.taxrate ?? line.tax ?? '';
      } else if (id === 'net' || id === 'netprice') {
        val = line.netprice ?? line.net ?? '';
      } else if (id === 'gross') {
        const netNum = parseNum(line.netprice ?? line.net);
        const taxNum = parseNum(line.taxrate ?? line.tax) ?? 0;
        const rebateNum = parseNum(line.rebate) ?? 0;
        if (netNum != null) {
          val = String(grossFromNet(netNum, taxNum, rebateNum));
        }
      }
    }

    let isError = false;
    if (id === 'name') {
      isError = !String(line.name ?? '').trim() && !String(line.sku ?? '').trim();
    } else if (id === 'amount') {
      const raw = getFirstVal(line.amount, line.count);
      isError = raw == null || parseNum(raw) == null;
    } else if (id === 'pu') {
      const raw = getFirstVal(line.pu, line.vpe);
      isError = raw == null || parseNum(raw) == null;
    } else if (id === 'tax' || id === 'taxrate') {
      const raw = getFirstVal(line.tax, line.taxrate, line.taxRate, line.mwst);
      isError = raw == null || parseNum(raw) == null;
    } else if (id === 'net' || id === 'netprice') {
      const raw = getFirstVal(line.net, line.netprice, line.netPrice, line.eknetto);
      isError = raw == null || parseNum(raw) == null;
    } else if (id === 'gross') {
      const raw = getFirstVal(line.gross, val);
      isError = raw == null || parseNum(raw) == null;
    } else if (id === 'sku') {
      isError = !String(line.sku ?? '').trim() && !String(line.name ?? '').trim();
    }

    const hasPosCol = columns?.[0]?.id === 'pos';
    const isFirstInput = hasPosCol ? colIdx === 1 : colIdx === 0;
    const isLast = colIdx === totalCols - 1;

    const { dirtyFields } = this.props;
    const isFieldDirty = Boolean(
      dirtyFields && (dirtyFields.__all__ || dirtyFields[id])
    );

    return (
      <TextField
        size="small"
        fullWidth
        type={type}
        value={val ?? ''}
        error={isError}
        disabled={saving}
        autoComplete="off"
        onChange={(e) => onChange(line.key, id, e.target.value)}
        onBlur={(e) => this.handleBlur(e, id)}
        slotProps={{
          htmlInput: {
            inputMode: type === 'number' ? 'decimal' : 'text',
            style: { textAlign: align },
            autoComplete: 'off',
            step: type === 'number' ? 'any' : undefined,
          },
        }}
        sx={{
          '& .MuiOutlinedInput-root': {
            borderRadius: isFirstInput ? '4px 0 0 4px' : isLast ? '0 4px 4px 0' : 0,
            ml: isFirstInput ? 0 : '-1px',
            ...(isFieldDirty && {
              bgcolor: 'rgba(237, 108, 2, 0.08)',
            }),
            '&:hover': {
              zIndex: 1,
            },
            '&.Mui-focused': {
              zIndex: 2,
            },
          },
          ...(isFieldDirty && {
            zIndex: 1,
            '& .MuiOutlinedInput-notchedOutline': {
              borderColor: 'warning.main',
              borderWidth: 2,
            },
            '&:hover .MuiOutlinedInput-notchedOutline': {
              borderColor: 'warning.main',
            },
          }),
          '& input[type=number]': {
            MozAppearance: 'textfield',
          },
          '& input[type=number]::-webkit-outer-spin-button, & input[type=number]::-webkit-inner-spin-button':
          {
            WebkitAppearance: 'none',
            margin: 0,
          },
        }}
      />
    );
  }

  renderSecondLine() {
    const { kind = 'delivery' } = this.props;
    const rawSku = this.props.line?.sku != null ? String(this.props.line.sku).trim() : '';

    if (kind === 'delivery') {
      return this.renderDeliverySecondLine(rawSku);
    }
    return this.renderArticleSecondLine(rawSku);
  }

  renderArticleSecondLine(rawSku) {
    const { loading, kind, columns } = this.props;
    const isOrder = kind === 'order';
    const hasNameColumn = columns?.some((c) => c.id === 'name');
    const { cachedArticle, loadingArticle } = this.state;

    if (loading || loadingArticle) {
      return (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, py: 0.25 }}>
          <CircularProgress size={14} thickness={5} sx={{ color: 'primary.main' }} />
          <Typography variant="caption" color="text.secondary" sx={{ fontStyle: 'italic', fontSize: '0.72rem' }}>
            Artikeldaten werden geladen…
          </Typography>
        </Box>
      );
    }

    if (cachedArticle) {
      const photo = cachedArticle.photos?.[0] || cachedArticle.articlepic?.[0];
      const fullHash = photo?.hash || photo?.fullHash;
      const thumbHash = photo?.thumbhash || photo?.thumbHash;
      const thumbW = photo?.thumbw || photo?.thumbW;
      const thumbH = photo?.thumbh || photo?.thumbH;
      const hasPhoto = fullHash != null || thumbHash != null;

      const eans = cachedArticle.eans ?? cachedArticle.articleean ?? [];
      const primaryEan = Array.isArray(eans) ? eans[0] : eans;

      const vkPrice = primaryPrice(cachedArticle);
      const vkNetto = vkPrice?.net;
      const vkBrutto = vkPrice
        ? priceBrutto(vkPrice) ??
        (vkPrice.net != null && vkPrice.taxrate != null
          ? vkPrice.net * (1 + vkPrice.taxrate / 100)
          : null)
        : null;

      const suppliers =
        Array.isArray(cachedArticle.suppliers) && cachedArticle.suppliers.length > 0
          ? cachedArticle.suppliers
          : (this.state.fallbackSuppliers ?? []);

      const topSupplier =
        suppliers.find((s) => s.sort === 0) ??
        (suppliers.length > 0
          ? [...suppliers].sort((a, b) => (Number(a.sort) || 0) - (Number(b.sort) || 0))[0]
          : null);

      const ekNetto =
        topSupplier?.price?.net != null
          ? Number(topSupplier.price.net)
          : topSupplier?.netPrice != null
            ? Number(topSupplier.netPrice)
            : topSupplier?.net != null
              ? Number(topSupplier.net)
              : null;

      const ekTaxRate =
        topSupplier?.price?.taxRate != null
          ? Number(topSupplier.price.taxRate)
          : topSupplier?.taxRate != null
            ? Number(topSupplier.taxRate)
            : parseNum(this.props.line?.taxrate ?? this.props.line?.tax) ?? selectCompanyTaxrate() ?? 19;

      const ekBrutto =
        ekNetto != null
          ? Math.round((ekNetto * (1 + Number(ekTaxRate) / 100) + Number.EPSILON) * 100) / 100
          : null;

      const hasPriceInfo =
        vkNetto != null || vkBrutto != null || ekNetto != null || ekBrutto != null || kind === 'quote';

      return (
        <Box
          sx={{
            display: 'flex',
            alignItems: 'center',
            gap: 1.25,
            py: 0.25,
            flexWrap: 'wrap',
          }}
        >
          {/* Article Photo Thumbnail */}
          <Box
            sx={{
              width: 28,
              height: 28,
              minWidth: 28,
              borderRadius: 0.75,
              overflow: 'hidden',
              bgcolor: BORDER,
              display: 'flex',
              alignItems: 'center',
              justifyContent: 'center',
              border: '1px solid',
              borderColor: 'divider',
            }}
          >
            {hasPhoto ? (
              <ArticlePhoto
                photo={{ fullHash, thumbHash, thumbW, thumbH }}
                size={28}
              />
            ) : (
              <Inventory2OutlinedIcon sx={{ fontSize: 16, color: 'text.secondary' }} />
            )}
          </Box>

          {/* Internal Article SKU */}
          {cachedArticle.sku && (
            <Chip
              component={RouterLink}
              to={artikelDetailPath(cachedArticle)}
              clickable
              size="small"
              label={`Art.-Nr.: ${cachedArticle.sku}`}
              sx={{
                height: 20,
                fontSize: '0.7rem',
                fontWeight: 600,
                bgcolor: 'primary.50',
                color: 'primary.dark',
                border: '1px solid',
                borderColor: 'primary.200',
                cursor: 'pointer',
                textDecoration: 'none',
                '&:hover': {
                  bgcolor: 'primary.100',
                },
              }}
            />
          )}

          {/* Brand */}
          {cachedArticle.brand?.name && (
            <BrandLabel
              brand={cachedArticle.brand}
              size={16}
              typographyProps={{
                variant: 'caption',
                color: 'text.secondary',
                fontWeight: 500,
              }}
            />
          )}

          {/* Article Name: omit if already editable in line 1 or if kind is order */}
          {!hasNameColumn && !isOrder && cachedArticle.name && (
            <Typography
              variant="caption"
              fontWeight={600}
              noWrap
              sx={{ color: 'text.primary', maxWidth: { xs: 200, sm: 300, md: 400 } }}
              title={cachedArticle.name}
            >
              {cachedArticle.name}
            </Typography>
          )}

          {/* Primary EAN: omit for order */}
          {!isOrder && primaryEan && (
            <Typography
              variant="caption"
              color="text.secondary"
              sx={{
                fontFamily: 'monospace',
                fontSize: '0.68rem',
                bgcolor: 'action.hover',
                px: 0.5,
                py: 0.1,
                borderRadius: 0.5,
              }}
            >
              EAN: {primaryEan}
            </Typography>
          )}

          {/* EK Netto, EK Brutto, VK Netto, VK Brutto */}
          {!isOrder && hasPriceInfo && (
            <Box
              sx={{
                display: 'flex',
                alignItems: 'center',
                gap: 1.5,
                ml: 'auto',
                whiteSpace: 'nowrap',
              }}
            >
              {/* EK Netto */}
              <Tooltip
                title={
                  topSupplier?.supplierName
                    ? `Lieferant: ${topSupplier.supplierName}${topSupplier.sku ? ` (Lief.-Art.-Nr.: ${topSupplier.sku})` : ''} (Sort: ${topSupplier.sort ?? 0})`
                    : 'Kein Lieferant mit EK-Preis hinterlegt'
                }
              >
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{
                    color: ekNetto != null ? 'text.secondary' : 'text.disabled',
                    fontSize: '0.72rem',
                  }}
                >
                  EK Netto: {ekNetto != null ? formatPrice(ekNetto) : '—'}
                </Typography>
              </Tooltip>

              {/* EK Brutto */}
              <Tooltip
                title={
                  topSupplier?.supplierName
                    ? `Lieferant: ${topSupplier.supplierName} (inkl. ${ekTaxRate}% MwSt.)`
                    : 'Kein Lieferant mit EK-Preis hinterlegt'
                }
              >
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{
                    color: ekBrutto != null ? 'text.secondary' : 'text.disabled',
                    fontSize: '0.72rem',
                  }}
                >
                  EK Brutto: {ekBrutto != null ? formatPrice(ekBrutto) : '—'}
                </Typography>
              </Tooltip>

              {/* VK Netto */}
              {vkNetto != null && (
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{ color: 'text.secondary', fontSize: '0.72rem' }}
                >
                  VK Netto: {formatPrice(vkNetto)}
                </Typography>
              )}

              {/* VK Brutto */}
              {vkBrutto != null && (
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{ color: 'primary.dark', fontSize: '0.72rem' }}
                >
                  VK Brutto: {formatPrice(vkBrutto)}
                </Typography>
              )}
            </Box>
          )}
        </Box>
      );
    }

    if (rawSku) {
      return (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, py: 0.25 }}>
          {this.props.onSearchArticle && (
            <Button
              size="small"
              variant="text"
              startIcon={<SearchIcon sx={{ fontSize: 14 }} />}
              onClick={this.handleSearchArticle}
              sx={{
                fontSize: '0.7rem',
                fontWeight: 600,
                textTransform: 'none',
                minWidth: 'auto',
                py: 0.25,
                px: 1,
                color: 'primary.main',
                '&:hover': {
                  bgcolor: 'primary.50',
                },
              }}
            >
              Artikel suchen
            </Button>
          )}
          <HelpOutlineIcon sx={{ fontSize: 15, color: 'warning.main' }} />
          <Typography variant="caption" color="text.secondary" sx={{ fontSize: '0.72rem' }}>
            Kein Artikel für SKU &bdquo;{rawSku}&ldquo; gefunden.
          </Typography>
        </Box>
      );
    }

    if (this.props.onSearchArticle) {
      return (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, py: 0.25 }}>
          <Button
            size="small"
            variant="text"
            startIcon={<SearchIcon sx={{ fontSize: 14 }} />}
            onClick={this.handleSearchArticle}
            sx={{
              fontSize: '0.7rem',
              fontWeight: 600,
              textTransform: 'none',
              minWidth: 'auto',
              py: 0.25,
              px: 1,
              color: 'primary.main',
              '&:hover': {
                bgcolor: 'primary.50',
              },
            }}
          >
            Artikel suchen
          </Button>
        </Box>
      );
    }

    return null;
  }

  renderDeliverySecondLine(rawSku) {
    const { supplierArticle, loading } = this.props;

    if (loading) {
      return (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, py: 0.25 }}>
          <CircularProgress size={14} thickness={5} sx={{ color: 'primary.main' }} />
          <Typography variant="caption" color="text.secondary" sx={{ fontStyle: 'italic', fontSize: '0.72rem' }}>
            Artikeldaten werden geladen…
          </Typography>
        </Box>
      );
    }

    if (supplierArticle) {
      const article = supplierArticle.article || {};
      const fullArticle = this.state.cachedArticle || article;
      const photo = fullArticle.photos?.[0] || fullArticle.articlepic?.[0] || article.photos?.[0] || article.articlepic?.[0];
      const fullHash = photo?.hash || photo?.fullHash;
      const thumbHash = photo?.thumbhash || photo?.thumbHash;
      const thumbW = photo?.thumbw || photo?.thumbW;
      const thumbH = photo?.thumbh || photo?.thumbH;
      const hasPhoto = fullHash != null || thumbHash != null;

      const eans = fullArticle.eans ?? fullArticle.articleean ?? article.eans ?? article.articleean ?? [];
      const primaryEan = Array.isArray(eans) ? eans[0] : eans;
      const priceNet = supplierArticle.price?.net;
      const taxRate = supplierArticle.price?.taxRate;

      const vkPrice = primaryPrice(fullArticle);
      const vkNetto = vkPrice?.net;
      const vkBrutto = vkPrice
        ? priceBrutto(vkPrice) ??
        (vkPrice.net != null && vkPrice.taxrate != null
          ? vkPrice.net * (1 + vkPrice.taxrate / 100)
          : null)
        : null;

      return (
        <Box
          sx={{
            display: 'flex',
            alignItems: 'center',
            gap: 1.25,
            py: 0.25,
            flexWrap: 'wrap',
          }}
        >
          {/* Unlink button at the front */}
          {this.props.onRemoveSupplierArticle && supplierArticle.id != null && (
            <Tooltip title="Lieferanten-Verknüpfung aufheben">
              <span>
                <IconButton
                  size="small"
                  color="error"
                  aria-label="Lieferanten-Verknüpfung entfernen"
                  disabled={this.props.saving || this.props.supplierArticleBusy}
                  onClick={this.handleRemoveSupplierArticle}
                  sx={{ p: 0.25, mr: -0.25 }}
                >
                  <LinkOffOutlinedIcon sx={{ fontSize: 16 }} />
                </IconButton>
              </span>
            </Tooltip>
          )}

          {/* Article Photo Thumbnail */}
          <Box
            sx={{
              width: 28,
              height: 28,
              minWidth: 28,
              borderRadius: 0.75,
              overflow: 'hidden',
              bgcolor: BORDER,
              display: 'flex',
              alignItems: 'center',
              justifyContent: 'center',
              border: '1px solid',
              borderColor: 'divider',
            }}
          >
            {hasPhoto ? (
              <ArticlePhoto
                photo={{ fullHash, thumbHash, thumbW, thumbH }}
                size={28}
              />
            ) : (
              <Inventory2OutlinedIcon sx={{ fontSize: 16, color: 'text.secondary' }} />
            )}
          </Box>

          {/* Internal Article SKU */}
          {article.sku && (
            <Chip
              component={RouterLink}
              to={artikelDetailPath(article)}
              clickable
              size="small"
              label={`Art.-Nr.: ${article.sku}`}
              sx={{
                height: 20,
                fontSize: '0.7rem',
                fontWeight: 600,
                bgcolor: 'primary.50',
                color: 'primary.dark',
                border: '1px solid',
                borderColor: 'primary.200',
                cursor: 'pointer',
                textDecoration: 'none',
                '&:hover': {
                  bgcolor: 'primary.100',
                },
              }}
            />
          )}

          {/* Brand */}
          {(fullArticle.brand?.name || article.brand?.name) && (
            <BrandLabel
              brand={fullArticle.brand || article.brand}
              size={16}
              typographyProps={{
                variant: 'caption',
                color: 'text.secondary',
                fontWeight: 500,
              }}
            />
          )}

          {/* Article Name */}
          {(fullArticle.name || article.name) && (
            <Typography
              variant="caption"
              fontWeight={600}
              noWrap
              sx={{ color: 'text.primary', maxWidth: { xs: 200, sm: 300, md: 400 } }}
              title={fullArticle.name || article.name}
            >
              {fullArticle.name || article.name}
            </Typography>
          )}

          {/* Supplier SKU if distinct */}
          {supplierArticle.sku && supplierArticle.sku !== rawSku && supplierArticle.sku !== article.sku && (
            <Typography variant="caption" color="text.secondary" sx={{ fontSize: '0.7rem' }}>
              (Lief.-SKU: <strong>{supplierArticle.sku}</strong>)
            </Typography>
          )}

          {/* Primary EAN */}
          {primaryEan && (
            <Typography
              variant="caption"
              color="text.secondary"
              sx={{ fontFamily: 'monospace', fontSize: '0.68rem', bgcolor: 'action.hover', px: 0.5, py: 0.1, borderRadius: 0.5 }}
            >
              EAN: {primaryEan}
            </Typography>
          )}

          {/* Stored Purchase Price (Netto), VK Netto & VK Brutto */}
          {(priceNet != null || vkNetto != null || vkBrutto != null) && (
            <Box
              sx={{
                display: 'flex',
                alignItems: 'center',
                gap: 1.5,
                ml: 'auto',
                whiteSpace: 'nowrap',
              }}
            >
              {priceNet != null && (
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{ color: 'success.dark', fontSize: '0.72rem' }}
                >
                  EK Netto: {formatPrice(priceNet)}
                  {taxRate != null ? ` (${taxRate}% MwSt)` : ''}
                </Typography>
              )}
              {vkNetto != null && (
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{ color: 'text.secondary', fontSize: '0.72rem' }}
                >
                  VK Netto: {formatPrice(vkNetto)}
                </Typography>
              )}
              {vkBrutto != null && (
                <Typography
                  variant="caption"
                  fontWeight={600}
                  sx={{ color: 'primary.dark', fontSize: '0.72rem' }}
                >
                  VK Brutto: {formatPrice(vkBrutto)}
                </Typography>
              )}
            </Box>
          )}

          {this.renderLedgerChip()}
        </Box>
      );
    }

    if (rawSku) {
      return (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, py: 0.25 }}>
          {this.props.onCreateArticle && (
            <Button
              size="small"
              variant="text"
              startIcon={<AddIcon sx={{ fontSize: 14 }} />}
              onClick={this.handleCreateArticle}
              sx={{
                fontSize: '0.7rem',
                fontWeight: 600,
                textTransform: 'none',
                minWidth: 'auto',
                py: 0.25,
                px: 1,
                color: 'primary.main',
                '&:hover': {
                  bgcolor: 'primary.50',
                },
              }}
            >
              Artikel anlegen
            </Button>
          )}
          {this.props.onSearchArticle && (
            <Button
              size="small"
              variant="text"
              startIcon={<SearchIcon sx={{ fontSize: 14 }} />}
              onClick={this.handleSearchArticle}
              sx={{
                fontSize: '0.7rem',
                fontWeight: 600,
                textTransform: 'none',
                minWidth: 'auto',
                py: 0.25,
                px: 1,
                color: 'primary.main',
                '&:hover': {
                  bgcolor: 'primary.50',
                },
              }}
            >
              Artikel suchen
            </Button>
          )}
          <HelpOutlineIcon sx={{ fontSize: 15, color: 'warning.main' }} />
          <Typography variant="caption" color="text.secondary" sx={{ fontSize: '0.72rem' }}>
            {this.props.kind === 'delivery'
              ? `Kein Lieferanten-Artikel für SKU „${rawSku}“ gefunden.`
              : `Kein Artikel für SKU „${rawSku}“ gefunden.`}
          </Typography>
          {this.renderLedgerChip()}
        </Box>
      );
    }

    if (this.props.ledgerLine) {
      return (
        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, py: 0.25 }}>
          {this.renderLedgerChip()}
        </Box>
      );
    }

    return null;
  }

  render() {
    const { columns = LINE_COLUMNS, saving } = this.props;
    const secondLine = this.renderSecondLine();

    return (
      <Fragment>
        {/* Row 1: Editable Line Inputs */}
        <TableRow hover sx={{ '& > td': { borderBottom: 'none', p: 0 } }}>
          {columns.map((col, colIdx) => (
            <TableCell
              key={col.id}
              align={col.align}
              sx={{
                p: 0,
                width: col.width,
                verticalAlign: 'middle',
              }}
            >
              {this.renderField(col, colIdx, columns.length)}
            </TableCell>
          ))}
          <TableCell padding="none" sx={{ py: 0.25, pl: 0.75, pr: 0, verticalAlign: 'middle', width: 40 }}>
            <IconButton
              size="small"
              aria-label="Zeile entfernen"
              disabled={saving}
              onClick={this.handleRemove}
            >
              <DeleteOutlinedIcon fontSize="small" />
            </IconButton>
          </TableCell>
        </TableRow>

        {/* Row 2: Matched Supplier Article Details */}
        {secondLine && (
          <TableRow sx={{ '& > td': { pt: 0.25, pb: 0.75, borderBottom: 'none' } }}>
            <TableCell
              colSpan={columns.length + 1}
              sx={{
                py: 0.4,
                px: 1,
                bgcolor: 'transparent',
              }}
            >
              {secondLine}
            </TableCell>
          </TableRow>
        )}
      </Fragment>
    );
  }
}

export default ManifestFormLine;