'use client';

import { useMemo, useState } from 'react';
import {
  Page,
  Text,
  View,
  Document,
  Image,
  StyleSheet,
  Font,
  pdf,
} from '@react-pdf/renderer';
import { Icon } from '@iconify/react';
import toast from 'react-hot-toast';

import Button from '@/components/Button';
import { Purchase } from '@/types/api/purchase/purchase';
import { formatDate, formatNumber } from '@/lib/helper';

Font.register({
  family: 'Helvetica',
  src: 'helvetica',
});

const pdfStyles = StyleSheet.create({
  page: {
    fontSize: 10,
    fontFamily: 'Helvetica',
    padding: 20,
    backgroundColor: '#FFFFFF',
  },
  header: {
    marginBottom: 20,
  },
  logo: {
    width: 120,
    height: 30,
    marginBottom: 8,
  },
  companyInfo: {
    fontSize: 12,
    fontWeight: 'bold',
    marginBottom: 4,
    color: '#1f74bf',
  },
  address: {
    fontSize: 8,
    color: '#666666',
    maxWidth: 400,
    marginBottom: 10,
  },
  divider: {
    borderBottomWidth: 1,
    borderBottomColor: '#000000',
    borderBottomStyle: 'solid',
    marginBottom: 15,
  },
  titleSection: {
    flexDirection: 'row',
    marginBottom: 20,
    justifyContent: 'space-between',
    alignItems: 'flex-start',
  },
  title: {
    fontSize: 18,
    fontWeight: 'bold',
    flex: 3,
    color: '#1f74bf',
  },
  poInfo: {
    flex: 1,
    fontSize: 9,
    textAlign: 'right',
  },
  sectionTitle: {
    fontSize: 12,
    fontWeight: 'bold',
    marginBottom: 8,
    color: '#1f74bf',
  },
  table: {
    borderWidth: 1,
    borderColor: '#000000',
    marginBottom: 15,
  },
  tableRow: {
    flexDirection: 'row',
  },
  tableHeader: {
    backgroundColor: '#F5F5F5',
  },
  tableCell: {
    flex: 1,
    borderRightWidth: 1,
    borderRightColor: '#000000',
    borderRightStyle: 'solid',
    padding: 8,
    fontSize: 9,
  },
  tableCellLast: {
    flex: 1,
    padding: 8,
    fontSize: 9,
  },
  tableCellHeader: {
    flex: 1,
    borderRightWidth: 1,
    borderRightColor: '#000000',
    borderRightStyle: 'solid',
    padding: 8,
    fontSize: 9,
    fontWeight: 'bold',
    backgroundColor: '#F5F5F5',
  },
  tableCellHeaderLast: {
    flex: 1,
    padding: 8,
    fontSize: 9,
    fontWeight: 'bold',
    backgroundColor: '#F5F5F5',
  },
  tableCellRight: {
    flex: 1,
    borderRightWidth: 1,
    borderRightColor: '#000000',
    borderRightStyle: 'solid',
    padding: 8,
    fontSize: 9,
    textAlign: 'right',
  },
  tableCellRightLast: {
    flex: 1,
    padding: 8,
    fontSize: 9,
    textAlign: 'right',
  },
  tableBorderBottom: {
    borderBottomWidth: 1,
    borderBottomColor: '#000000',
    borderBottomStyle: 'solid',
  },
  grandTotalRow: {
    flexDirection: 'row',
    borderTopWidth: 1,
    borderTopColor: '#000000',
    borderTopStyle: 'solid',
  },
  grandTotalLabel: {
    flex: 3,
    padding: 8,
    fontSize: 9,
    fontWeight: 'bold',
    textAlign: 'right',
    borderRightWidth: 1,
    borderRightColor: '#000000',
    borderRightStyle: 'solid',
  },
  grandTotalValue: {
    flex: 1,
    padding: 8,
    fontSize: 9,
    fontWeight: 'bold',
    textAlign: 'right',
    borderRightWidth: 0,
  },
  allocationSection: {
    marginBottom: 15,
  },
  allocationTable: {
    borderWidth: 1,
    borderColor: '#000000',
  },
  innerTable: {
    marginTop: 5,
    borderWidth: 1,
    borderColor: '#000000',
  },
  innerRow: {
    flexDirection: 'row',
    borderBottomWidth: 1,
    borderBottomColor: '#000000',
    borderBottomStyle: 'solid',
  },
  innerCell: {
    flex: 1,
    borderRightWidth: 1,
    borderRightColor: '#000000',
    borderRightStyle: 'solid',
    padding: 8,
    fontSize: 9,
  },
  innerCellLast: {
    flex: 1,
    padding: 8,
    fontSize: 9,
  },
  innerCellRight: {
    flex: 1,
    borderRightWidth: 1,
    borderRightColor: '#000000',
    borderRightStyle: 'solid',
    padding: 8,
    fontSize: 9,
    textAlign: 'right',
  },
  innerCellRightLast: {
    flex: 1,
    padding: 8,
    fontSize: 9,
    textAlign: 'right',
  },
  footer: {
    marginTop: 30,
    flexDirection: 'row',
    justifyContent: 'space-between',
    alignItems: 'flex-start',
  },
  footerCompany: {
    fontSize: 12,
    fontWeight: 'bold',
    textAlign: 'right',
    flex: 1,
    color: '#1f74bf',
  },
  specialInstructionTable: {
    width: '60%',
    maxWidth: 300,
    borderWidth: 1,
    borderColor: '#000000',
    flex: 1,
  },
});

interface PurchaseOrderInvoiceProps {
  data?: Purchase;
  className?: string;
}

const PurchaseOrderInvoice = ({ data }: PurchaseOrderInvoiceProps) => {
  const [, setIsGeneratingPDF] = useState(false);
  const purchaseData = data;

  const grandTotal = useMemo(() => {
    return (
      purchaseData?.items?.reduce(
        (sum, item) => sum + (item.total_price || 0),
        0
      ) || 0
    );
  }, [purchaseData?.items]);

  const handleDownloadPDF = async () => {
    if (!purchaseData) {
      toast.error('No purchase order data available');
      return;
    }

    setIsGeneratingPDF(true);
    try {
      const PDFDocument = () => (
        <Document>
          <Page size='A4' style={pdfStyles.page}>
            {/* Header Section */}
            <View style={pdfStyles.header}>
              <Image
                src={'https://placehold.co/120x30/png'}
                style={pdfStyles.logo}
                id={'mbu-logo'}
              />
              <Text style={pdfStyles.companyInfo}>
                PT LUMBUNG TELUR INDONESIA
              </Text>
              <Text style={pdfStyles.address}>
                SOHO Building Lt.3 (Paris Van Java), Jalan Karang Tinggal, Kel.
                Cipedes, Kec. Sukajadi, Kota Bandung 40162
              </Text>
              <View style={pdfStyles.divider} />
            </View>

            {/* Purchase Order Title */}
            <View style={pdfStyles.titleSection}>
              <Text style={pdfStyles.title}>PURCHASE ORDER</Text>
              <View style={pdfStyles.poInfo}>
                <Text>PO Number: {purchaseData?.po_number || '-'}</Text>
                <Text>
                  Date:{' '}
                  {purchaseData?.po_date
                    ? formatDate(purchaseData.po_date, 'DD MMM YYYY')
                    : formatDate(new Date(), 'DD MMM YYYY')}
                </Text>
              </View>
            </View>

            {/* Vendor and Ship To Table */}
            <View style={pdfStyles.table}>
              <View style={[pdfStyles.tableRow, pdfStyles.tableHeader]}>
                <View style={pdfStyles.tableCellHeader}>
                  <Text>Vendor</Text>
                </View>
                <View style={pdfStyles.tableCellHeaderLast}>
                  <Text>Ship To</Text>
                </View>
              </View>
              <View style={pdfStyles.tableRow}>
                <View style={pdfStyles.tableCell}>
                  <Text style={{ fontWeight: 'bold' }}>
                    {purchaseData?.supplier?.name || '-'} (
                    {purchaseData?.supplier?.alias || ''})
                  </Text>
                  <Text>{purchaseData?.supplier?.category || '-'}</Text>
                  <Text>
                    Credit Term: {purchaseData?.credit_term || 0} hari
                  </Text>
                  <Text>
                    Due Date:{' '}
                    {purchaseData?.due_date
                      ? formatDate(purchaseData.due_date, 'DD MMM YYYY')
                      : '-'}
                  </Text>
                </View>
                <View style={pdfStyles.tableCellLast}>
                  <Text style={{ fontWeight: 'bold' }}>
                    PT LUMBUNG TELUR INDONESIA
                  </Text>
                  <Text>
                    {purchaseData?.items?.[0]?.warehouse &&
                    'location' in purchaseData.items[0].warehouse
                      ? purchaseData.items[0].warehouse.location.name
                      : '-'}
                  </Text>
                  <Text>
                    {purchaseData?.items?.[0]?.warehouse &&
                    'location' in purchaseData.items[0].warehouse
                      ? purchaseData.items[0].warehouse.location.address
                      : '-'}
                  </Text>
                </View>
              </View>
            </View>

            {/* Item Description Table */}
            <View>
              <View style={pdfStyles.table}>
                <View style={[pdfStyles.tableRow, pdfStyles.tableHeader]}>
                  <View style={pdfStyles.tableCellHeader}>
                    <Text>Item Description</Text>
                  </View>
                  <View style={pdfStyles.tableCellHeader}>
                    <Text>Unit Price</Text>
                  </View>
                  <View style={pdfStyles.tableCellHeader}>
                    <Text>Quantity</Text>
                  </View>
                  <View style={pdfStyles.tableCellHeaderLast}>
                    <Text>Total Amount</Text>
                  </View>
                </View>
                {purchaseData?.items?.map((item, index) => {
                  const isLastItem =
                    index === (purchaseData?.items?.length || 0) - 1;
                  return (
                    <View
                      key={index}
                      style={[
                        pdfStyles.tableRow,
                        isLastItem ? {} : pdfStyles.tableBorderBottom,
                      ]}
                    >
                      <View style={pdfStyles.tableCell}>
                        <Text>{item.product?.name || '-'}</Text>
                      </View>
                      <View style={pdfStyles.tableCellRight}>
                        <Text>Rp{formatNumber(item.price || 0)}</Text>
                      </View>
                      <View style={pdfStyles.tableCellRight}>
                        <Text>{formatNumber(item.sub_qty || 0)}</Text>
                      </View>
                      <View style={pdfStyles.tableCellRightLast}>
                        <Text>Rp{formatNumber(item.total_price || 0)}</Text>
                      </View>
                    </View>
                  );
                }) || []}

                {/* Grand Total Row inside table */}
                <View style={pdfStyles.grandTotalRow}>
                  <View style={[pdfStyles.tableCell, { borderRightWidth: 0 }]}>
                    <Text></Text>
                  </View>
                  <View
                    style={[pdfStyles.tableCellRight, { borderRightWidth: 0 }]}
                  >
                    <Text></Text>
                  </View>
                  <View style={pdfStyles.tableCellRight}>
                    <Text style={{ fontWeight: 'bold' }}>Grand Total</Text>
                  </View>
                  <View
                    style={[
                      pdfStyles.tableCellRightLast,
                      { fontWeight: 'bold' },
                    ]}
                  >
                    <Text>Rp{formatNumber(grandTotal)}</Text>
                  </View>
                </View>
              </View>
            </View>

            {/* Product Allocation Section */}
            <View style={pdfStyles.allocationSection}>
              <Text style={pdfStyles.sectionTitle}>Product Allocation</Text>
              <View style={pdfStyles.allocationTable}>
                <View style={[pdfStyles.tableRow, pdfStyles.tableHeader]}>
                  <View style={pdfStyles.tableCellHeader}>
                    <Text>Warehouse Name</Text>
                  </View>
                  <View style={pdfStyles.tableCellHeader}>
                    <Text>Area</Text>
                  </View>
                  <View style={pdfStyles.tableCellHeader}>
                    <Text>Location Address</Text>
                  </View>
                  <View style={pdfStyles.tableCellHeaderLast}>
                    <Text>Product Allocation</Text>
                  </View>
                </View>
                {purchaseData?.items?.map((item, itemIndex) => (
                  <View key={itemIndex} style={pdfStyles.tableRow}>
                    <View style={pdfStyles.tableCell}>
                      <Text>{item.warehouse?.name || '-'}</Text>
                    </View>
                    <View style={pdfStyles.tableCell}>
                      <Text>{item.warehouse?.area?.name || '-'}</Text>
                    </View>
                    <View style={pdfStyles.tableCell}>
                      <Text>
                        {item.warehouse && 'location' in item.warehouse
                          ? item.warehouse.location.address
                          : '-'}
                      </Text>
                    </View>
                    <View style={pdfStyles.tableCellLast}>
                      {/* Inner table for product allocation */}
                      <View style={pdfStyles.innerTable}>
                        {/* Header for inner table */}
                        <View
                          style={[
                            pdfStyles.innerRow,
                            { backgroundColor: '#F5F5F5' },
                          ]}
                        >
                          <Text style={pdfStyles.innerCell}>Item</Text>
                          <Text style={pdfStyles.innerCellRightLast}>
                            Quantity
                          </Text>
                        </View>
                        {/* Data row */}
                        <View style={pdfStyles.innerRow}>
                          <Text style={pdfStyles.innerCell}>
                            {item.product?.name || '-'}
                          </Text>
                          <Text style={pdfStyles.innerCellRightLast}>
                            {formatNumber(item.total_qty || 0)} of{' '}
                            {formatNumber(item.sub_qty || 0)}
                          </Text>
                        </View>
                      </View>
                    </View>
                  </View>
                )) || []}
              </View>
            </View>

            {/* Footer with Special Instructions */}
            <View style={pdfStyles.footer}>
              <View style={pdfStyles.specialInstructionTable}>
                <View style={[pdfStyles.tableRow, pdfStyles.tableHeader]}>
                  <View style={pdfStyles.tableCellHeaderLast}>
                    <Text>Notes</Text>
                  </View>
                </View>
                <View style={pdfStyles.tableRow}>
                  <View style={pdfStyles.tableCellLast}>
                    <Text>{purchaseData?.notes || '-'}</Text>
                  </View>
                </View>
              </View>
              <View style={pdfStyles.footerCompany}>
                <Text>PT LUMBUNG TELUR INDONESIA</Text>
              </View>
            </View>
          </Page>
        </Document>
      );

      const blob = await pdf(<PDFDocument />).toBlob();

      const url = URL.createObjectURL(blob);
      const link = document.createElement('a');
      link.href = url;
      link.download = `${purchaseData?.po_number || 'purchase-order'}.pdf`;
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      URL.revokeObjectURL(url);
    } catch {
      toast.error('Failed to generate PDF. Please try again.');
    } finally {
      setIsGeneratingPDF(false);
    }
  };

  if (!purchaseData) {
    return (
      <div className='flex items-center justify-center min-h-screen'>
        <div className='text-gray-500'>No purchase order data available</div>
      </div>
    );
  }

  return purchaseData?.po_number &&
    purchaseData.po_number !== 'Belum dibuat' ? (
    <Button
      color='primary'
      className='w-fit min-w-32 flex items-center justify-start gap-1 px-2 py-1 text-sm font-mono'
      onClick={handleDownloadPDF}
    >
      <Icon icon='material-symbols:file-open-outline' width={16} height={16} />
      {purchaseData.po_number}
    </Button>
  ) : null;
};

export default PurchaseOrderInvoice;