import { useState, useMemo, useCallback } from 'react';
import { ChangeEventHandler } from 'react';
import useSWR from 'swr';
import Card from '@/components/Card';
import SelectInput, {
  useSelect,
  OptionType,
} from '@/components/input/SelectInput';
import DateInput from '@/components/input/DateInput';
import TextInput from '@/components/input/TextInput';
import CheckboxInput from '@/components/input/CheckboxInput';
import { AreaApi } from '@/services/api/master-data';
import { LocationApi } from '@/services/api/master-data';
import { KandangApi } from '@/services/api/master-data';
import { SaleReportApi } from '@/services/api/report/marketing-sale';
import Table from '@/components/Table';
import { ColumnDef } from '@tanstack/react-table';
import { formatCurrency, formatNumber } from '@/lib/helper';
import { HppPerKandangReport } from '@/types/api/report/hpp-per-kandang';
import { isResponseSuccess } from '@/lib/api-helper';
import { useTableFilter } from '@/services/hooks/useTableFilter';
import Button from '@/components/Button';
import Dropdown from '@/components/dropdown/Dropdown';
import MenuItem from '@/components/menu/MenuItem';
import Menu from '@/components/menu/Menu';
import { generateHppPerKandangPDF } from '../export/HppPerkandangExport';
import toast from 'react-hot-toast';
import * as XLSX from 'xlsx';

interface Totals {
  total_remaining_chicken_birds: number;
  total_remaining_chicken_weight_kg: number;
  total_remaining_value_rp: number;
}

const HppPerKandangTab = () => {
  // ===== STATE MANAGEMENT =====
  const [isPdfExportLoading, setIsPdfExportLoading] = useState(false);

  // ===== SUBMISSION STATE =====
  const [isSubmitted, setIsSubmitted] = useState(false);

  // ===== TABLE FILTER STATE =====
  const { state: tableFilterState, updateFilter } = useTableFilter({
    initial: {
      area_id: '',
      location_id: '',
      kandang_id: '',
      weight_min: '',
      weight_max: '',
      period: '',
      sort_by: '',
      show_unrecorded: false,
    },
    paramMap: {
      page: 'page',
      pageSize: 'limit',
    },
  });

  const { options: areaOptions, isLoadingOptions: isLoadingAreas } = useSelect(
    AreaApi.basePath,
    'id',
    'name',
    'search'
  );

  const { options: locationOptions, isLoadingOptions: isLoadingLocations } =
    useSelect(LocationApi.basePath, 'id', 'name', 'search');

  const { options: kandangOptions, isLoadingOptions: isLoadingKandangs } =
    useSelect(KandangApi.basePath, 'id', 'name', 'search');

  const areaChangeHandler = useCallback(
    (val: OptionType | OptionType[] | null) => {
      const newVal = val as OptionType;
      updateFilter('area_id', newVal?.value ? String(newVal.value) : '');
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const locationChangeHandler = useCallback(
    (val: OptionType | OptionType[] | null) => {
      const newVal = val as OptionType;
      updateFilter('location_id', newVal?.value ? String(newVal.value) : '');
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const kandangChangeHandler = useCallback(
    (val: OptionType | OptionType[] | null) => {
      const newVal = val as OptionType;
      updateFilter('kandang_id', newVal?.value ? String(newVal.value) : '');
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const weightMinChangeHandler = useCallback<
    ChangeEventHandler<HTMLInputElement>
  >(
    (e) => {
      const val = e.target.value;
      updateFilter('weight_min', val || '');
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const weightMaxChangeHandler = useCallback<
    ChangeEventHandler<HTMLInputElement>
  >(
    (e) => {
      const val = e.target.value;
      updateFilter('weight_max', val || '');
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const periodChangeHandler = useCallback<ChangeEventHandler<HTMLInputElement>>(
    (e) => {
      const val = e.target.value;
      updateFilter('period', val || '');
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const showUnrecordedChangeHandler = useCallback<
    ChangeEventHandler<HTMLInputElement>
  >(
    (e) => {
      const checked = e.target.checked;
      updateFilter('show_unrecorded', checked);
      setIsSubmitted(false);
    },
    [updateFilter]
  );

  const resetFilters = useCallback(() => {
    updateFilter('area_id', '');
    updateFilter('location_id', '');
    updateFilter('kandang_id', '');
    updateFilter('weight_min', '');
    updateFilter('weight_max', '');
    updateFilter('period', '');
    updateFilter('sort_by', '');
    updateFilter('show_unrecorded', false);
    setIsSubmitted(false);
  }, [updateFilter]);

  const handleSubmit = useCallback(() => {
    if (!tableFilterState.period) {
      toast.error('Periode wajib diisi');
      return;
    }
    setIsSubmitted(true);
  }, [tableFilterState.period]);

  // ===== DATA FETCHING =====
  const { data: hppPerKandang, isLoading } = useSWR(
    isSubmitted
      ? () => {
          const params = {
            area_id: tableFilterState.area_id
              ? Number(tableFilterState.area_id)
              : undefined,
            location_id: tableFilterState.location_id
              ? Number(tableFilterState.location_id)
              : undefined,
            kandang_id: tableFilterState.kandang_id
              ? Number(tableFilterState.kandang_id)
              : undefined,
            weight_min: tableFilterState.weight_min
              ? Number(tableFilterState.weight_min)
              : undefined,
            weight_max: tableFilterState.weight_max
              ? Number(tableFilterState.weight_max)
              : undefined,
            period: tableFilterState.period || undefined,
            sort_by: tableFilterState.sort_by || undefined,
            show_unrecorded: tableFilterState.show_unrecorded,
          };

          return ['hpp-per-kandang-report', params];
        }
      : null,
    ([, params]) =>
      SaleReportApi.getHppPerKandangReport(
        params.area_id,
        params.location_id,
        params.kandang_id,
        params.weight_min,
        params.weight_max,
        params.period,
        params.sort_by,
        params.show_unrecorded
      )
  );

  const data: HppPerKandangReport['rows'] = useMemo(
    () =>
      isResponseSuccess(hppPerKandang)
        ? (hppPerKandang?.data?.rows as HppPerKandangReport['rows']) || []
        : [],
    [hppPerKandang]
  );

  const summary =
    isResponseSuccess(hppPerKandang) && hppPerKandang?.data?.summary
      ? hppPerKandang.data.summary
      : undefined;

  const period =
    isResponseSuccess(hppPerKandang) && hppPerKandang?.data?.period
      ? hppPerKandang.data.period
      : undefined;

  const { data: allDataForExport } = useSWR(
    isSubmitted
      ? () => {
          const params = {
            area_id: tableFilterState.area_id
              ? Number(tableFilterState.area_id)
              : undefined,
            location_id: tableFilterState.location_id
              ? Number(tableFilterState.location_id)
              : undefined,
            kandang_id: tableFilterState.kandang_id
              ? Number(tableFilterState.kandang_id)
              : undefined,
            weight_min: tableFilterState.weight_min
              ? Number(tableFilterState.weight_min)
              : undefined,
            weight_max: tableFilterState.weight_max
              ? Number(tableFilterState.weight_max)
              : undefined,
            period: tableFilterState.period || undefined,
            sort_by: tableFilterState.sort_by || undefined,
            show_unrecorded: tableFilterState.show_unrecorded,
          };

          return ['hpp-per-kandang-report-export', params];
        }
      : null,
    ([, params]) =>
      SaleReportApi.getHppPerKandangReport(
        params.area_id,
        params.location_id,
        params.kandang_id,
        params.weight_min,
        params.weight_max,
        params.period,
        params.sort_by,
        params.show_unrecorded
      )
  );

  const allExportData: HppPerKandangReport['rows'] = useMemo(
    () =>
      isResponseSuccess(allDataForExport)
        ? (allDataForExport?.data?.rows as HppPerKandangReport['rows']) || []
        : [],
    [allDataForExport]
  );

  // ===== EXPORT HANDLERS =====
  const handleExportExcel = useCallback(() => {
    if (allExportData.length === 0) {
      toast.error('Tidak ada data untuk diekspor.');
      return;
    }

    try {
      const totals = allExportData.reduce(
        (acc, item) => ({
          total_remaining_chicken_birds:
            acc.total_remaining_chicken_birds +
            (item.remaining_chicken_birds || 0),
          total_remaining_chicken_weight_kg:
            acc.total_remaining_chicken_weight_kg +
            (item.remaining_chicken_weight_kg || 0),
          total_remaining_value_rp:
            acc.total_remaining_value_rp + (item.remaining_value_rp || 0),
        }),
        {
          total_remaining_chicken_birds: 0,
          total_remaining_chicken_weight_kg: 0,
          total_remaining_value_rp: 0,
        }
      );

      const excelData: { [key: string]: string | number }[] = allExportData.map(
        (item, index) => ({
          No: index + 1,
          Kandang: item.kandang?.name || '',
          'Rentang Bobot': item.weight_range
            ? `${formatNumber(item.weight_range.weight_min)} - ${formatNumber(item.weight_range.weight_max)}`
            : '',
          'Sisa Ayam (Ekor)': item.remaining_chicken_birds || 0,
          'Sisa Ayam (KG)': item.remaining_chicken_weight_kg || 0,
          'Rata-Rata Bobot (KG)': item.avg_weight_kg || 0,
          'Feed (Supplier)':
            item.feed_suppliers?.map((s) => s.alias || s.name).join(' | ') ||
            '',
          'DOC (Supplier)':
            item.doc_suppliers?.map((s) => s.alias || s.name).join(' | ') || '',
          'Rata-Rata Harga DOC (RP)': item.average_doc_price_rp || 0,
          'HPP (RP)': item.hpp_rp || 0,
          'Nilai Nominal Sisa Ayam (RP)': item.remaining_value_rp || 0,
        })
      );

      excelData.push({
        No: 'TOTAL',
        Kandang: 'ALL',
        'Rentang Bobot': '-',
        'Sisa Ayam (Ekor)': totals.total_remaining_chicken_birds,
        'Sisa Ayam (KG)': totals.total_remaining_chicken_weight_kg,
        'Rata-Rata Bobot (KG)': '',
        'Feed (Supplier)': '',
        'DOC (Supplier)': '',
        'Rata-Rata Harga DOC (RP)': '',
        'HPP (RP)': '',
        'Nilai Nominal Sisa Ayam (RP)': totals.total_remaining_value_rp,
      });

      const worksheet = XLSX.utils.json_to_sheet(excelData);

      const colWidths = [
        { wch: 5 }, // No
        { wch: 30 }, // Kandang
        { wch: 15 }, // Rentang Bobot
        { wch: 15 }, // Sisa Ayam (Ekor)
        { wch: 15 }, // Sisa Ayam (KG)
        { wch: 18 }, // Rata-Rata Bobot (KG)
        { wch: 20 }, // Feed (Supplier)
        { wch: 20 }, // DOC (Supplier)
        { wch: 20 }, // Rata-Rata Harga DOC (RP)
        { wch: 12 }, // HPP (RP)
        { wch: 25 }, // Nilai Nominal Sisa Ayam (RP)
      ];
      worksheet['!cols'] = colWidths;

      const workbook = XLSX.utils.book_new();
      XLSX.utils.book_append_sheet(workbook, worksheet, 'HPP Per Kandang');

      const areaName = tableFilterState.area_id
        ? areaOptions.find(
            (opt) => opt.value === Number(tableFilterState.area_id)
          )?.label || 'Semua Area'
        : 'Semua Area';

      const locationName = tableFilterState.location_id
        ? locationOptions.find(
            (opt) => opt.value === Number(tableFilterState.location_id)
          )?.label || 'Semua Lokasi'
        : 'Semua Lokasi';

      const kandangName = tableFilterState.kandang_id
        ? kandangOptions.find(
            (opt) => opt.value === Number(tableFilterState.kandang_id)
          )?.label || 'Semua Kandang'
        : 'Semua Kandang';

      const filename = `Laporan_HPP_Per_Kandang_${areaName}_${locationName}_${kandangName}_${tableFilterState.period}.xlsx`;

      XLSX.writeFile(workbook, filename);
      toast.success('Excel berhasil dibuat dan diunduh.');
    } catch {
      toast.error('Gagal membuat Excel. Silakan coba lagi.');
    }
  }, [
    allExportData,
    tableFilterState,
    areaOptions,
    locationOptions,
    kandangOptions,
  ]);

  const handleExportPDF = useCallback(async () => {
    if (!hppPerKandang || !isResponseSuccess(hppPerKandang)) {
      toast.error('Tidak ada data untuk diekspor.');
      return;
    }

    try {
      const areaName = tableFilterState.area_id
        ? areaOptions.find(
            (opt) => opt.value === Number(tableFilterState.area_id)
          )?.label || 'Semua Area'
        : 'Semua Area';

      const locationName = tableFilterState.location_id
        ? locationOptions.find(
            (opt) => opt.value === Number(tableFilterState.location_id)
          )?.label || 'Semua Lokasi'
        : 'Semua Lokasi';

      const kandangName = tableFilterState.kandang_id
        ? kandangOptions.find(
            (opt) => opt.value === Number(tableFilterState.kandang_id)
          )?.label || 'Semua Kandang'
        : 'Semua Kandang';

      await generateHppPerKandangPDF(hppPerKandang.data, {
        area_name: areaName,
        location_name: locationName,
        kandang_name: kandangName,
        period: tableFilterState.period,
        weight_min: tableFilterState.weight_min,
        weight_max: tableFilterState.weight_max,
        show_unrecorded: tableFilterState.show_unrecorded.toString(),
        sort_by: tableFilterState.sort_by,
      });

      toast.success('PDF berhasil dibuat dan diunduh.');
    } catch {
      toast.error('Gagal membuat PDF. Silakan coba lagi.');
    }
  }, [
    hppPerKandang,
    tableFilterState,
    areaOptions,
    locationOptions,
    kandangOptions,
  ]);

  // ===== TABLE COLUMNS DEFINITION =====
  const totals: Totals = useMemo(() => {
    return {
      total_remaining_chicken_birds:
        summary?.total_remaining_chicken_birds || 0,
      total_remaining_chicken_weight_kg:
        summary?.total_remaining_chicken_weight_kg || 0,
      total_remaining_value_rp: summary?.total_remaining_value_rp || 0,
    };
  }, [summary]);

  const allFeedSuppliers = useMemo(() => {
    const suppliers = new Set<string>();
    data.forEach((item) => {
      item.feed_suppliers?.forEach((s) => {
        suppliers.add(s.alias || s.name);
      });
    });
    return Array.from(suppliers).join(' | ');
  }, [data]);

  const allDocSuppliers = useMemo(() => {
    const suppliers = new Set<string>();
    data.forEach((item) => {
      item.doc_suppliers?.forEach((s) => {
        suppliers.add(s.alias || s.name);
      });
    });
    return Array.from(suppliers).join(' | ');
  }, [data]);

  const getTableColumns = (): ColumnDef<HppPerKandangReport['rows'][0]>[] => {
    const tableColumns: ColumnDef<HppPerKandangReport['rows'][0]>[] = [
      {
        id: 'no',
        header: 'No',
        cell: (props) => props.row.index + 1,
        footer: () => <div className='font-semibold text-gray-900'>TOTAL</div>,
      },
      {
        id: 'kandang_name',
        header: 'Kandang',
        accessorKey: 'kandang.name',
        cell: (props) => {
          const kandang = props.row.original.kandang;
          return kandang?.name || '-';
        },
        footer: () => <div className='font-semibold text-gray-900'>ALL</div>,
      },
      {
        id: 'weight_range',
        header: 'Rentang Bobot',
        accessorKey: 'weight_range',
        cell: (props) => {
          const weightRange = props.row.original.weight_range;
          return weightRange
            ? `${formatNumber(weightRange.weight_min)} - ${formatNumber(weightRange.weight_max)}`
            : '-';
        },
        footer: () => <div className='font-semibold text-gray-900'>-</div>,
      },
      {
        id: 'remaining_chicken_birds',
        header: 'Sisa Ayam (Ekor)',
        accessorKey: 'remaining_chicken_birds',
        cell: (props) => {
          const value = props.row.original.remaining_chicken_birds;
          return <div className='text-right'>{formatNumber(value)}</div>;
        },
        footer: () => (
          <div className='text-right font-semibold text-gray-900'>
            {formatNumber(totals.total_remaining_chicken_birds)}
          </div>
        ),
      },
      {
        id: 'remaining_chicken_weight_kg',
        header: 'Sisa Ayam (KG)',
        accessorKey: 'remaining_chicken_weight_kg',
        cell: (props) => {
          const value = props.row.original.remaining_chicken_weight_kg;
          return <div className='text-right'>{formatNumber(value)}</div>;
        },
        footer: () => (
          <div className='text-right font-semibold text-gray-900'>
            {formatNumber(totals.total_remaining_chicken_weight_kg)}
          </div>
        ),
      },
      {
        id: 'avg_weight_kg',
        header: 'Rata-Rata Bobot (KG)',
        accessorKey: 'avg_weight_kg',
        cell: (props) => {
          const value = props.row.original.avg_weight_kg;
          return <div className='text-right'>{formatNumber(value)}</div>;
        },
        footer: () => (
          <div className='text-right font-semibold text-gray-900'>
            {formatNumber(summary?.average_weight_kg || 0)}
          </div>
        ),
      },
      {
        id: 'feed_suppliers',
        header: 'Feed (Supplier)',
        accessorKey: 'feed_suppliers',
        cell: (props) => {
          const suppliers = props.row.original.feed_suppliers;
          return suppliers?.map((s) => s.alias || s.name).join(' | ') || '-';
        },
        footer: () => (
          <div className='font-semibold text-gray-900'>
            {allFeedSuppliers || '-'}
          </div>
        ),
      },
      {
        id: 'doc_suppliers',
        header: 'DOC (Supplier)',
        accessorKey: 'doc_suppliers',
        cell: (props) => {
          const suppliers = props.row.original.doc_suppliers;
          return suppliers?.map((s) => s.alias || s.name).join(' | ') || '-';
        },
        footer: () => (
          <div className='font-semibold text-gray-900'>
            {allDocSuppliers || '-'}
          </div>
        ),
      },
      {
        id: 'average_doc_price_rp',
        header: 'Rata-Rata Harga DOC (RP)',
        accessorKey: 'average_doc_price_rp',
        cell: (props) => {
          const value = props.row.original.average_doc_price_rp;
          return <div className='text-right'>{formatCurrency(value)}</div>;
        },
        footer: () => (
          <div className='text-right font-semibold text-gray-900'>
            {formatCurrency(
              summary?.total_remaining_value_rp &&
                summary?.total_remaining_chicken_birds
                ? summary.total_remaining_value_rp /
                    summary.total_remaining_chicken_birds
                : 0
            )}
          </div>
        ),
      },
      {
        id: 'hpp_rp',
        header: 'HPP (RP)',
        accessorKey: 'hpp_rp',
        cell: (props) => {
          const value = props.row.original.hpp_rp;
          return <div className='text-right'>{formatCurrency(value)}</div>;
        },
        footer: () => (
          <div className='text-right font-semibold text-gray-900'>
            {formatCurrency(
              summary?.total_remaining_value_rp &&
                summary?.total_remaining_chicken_birds
                ? summary.total_remaining_value_rp /
                    summary.total_remaining_chicken_birds
                : 0
            )}
          </div>
        ),
      },
      {
        id: 'remaining_value_rp',
        header: 'Nilai Nominal Sisa Ayam (RP)',
        accessorKey: 'remaining_value_rp',
        cell: (props) => {
          const value = props.row.original.remaining_value_rp;
          return <div className='text-right'>{formatCurrency(value)}</div>;
        },
        footer: () => (
          <div className='text-right font-semibold text-gray-900'>
            {formatCurrency(totals.total_remaining_value_rp)}
          </div>
        ),
      },
    ];
    return tableColumns;
  };

  return (
    <div className='w-full p-0 sm:p-4'>
      <Card
        subtitle={
          period
            ? `Laporan > HPP Harian Kandang (${period})`
            : 'Laporan > HPP Harian Kandang'
        }
        className={{ wrapper: 'w-full', body: 'p-1!' }}
      >
        <div className='mb-4 flex justify-end gap-2 [&_button]:px-4'>
          <Button color='primary' onClick={handleSubmit}>
            Cari
          </Button>
          <Button color='warning' onClick={resetFilters}>
            Reset
          </Button>
          <Dropdown
            trigger={<Button color='success'>Export</Button>}
            align='end'
          >
            <Menu className='w-32'>
              <MenuItem title='Excel' onClick={handleExportExcel} />
              <MenuItem title='PDF' onClick={handleExportPDF} />
            </Menu>
          </Dropdown>
        </div>

        <div className='grid md:grid-cols-3 grid-cols-1 gap-4'>
          <SelectInput
            label='Area'
            placeholder='Pilih Area'
            options={areaOptions}
            value={
              tableFilterState.area_id
                ? areaOptions.find(
                    (option) =>
                      option.value === Number(tableFilterState.area_id)
                  ) || null
                : null
            }
            onChange={areaChangeHandler}
            isLoading={isLoadingAreas}
            isClearable
          />
          <SelectInput
            label='Lokasi'
            placeholder='Pilih Lokasi'
            options={locationOptions}
            value={
              tableFilterState.location_id
                ? locationOptions.find(
                    (option) =>
                      option.value === Number(tableFilterState.location_id)
                  ) || null
                : null
            }
            onChange={locationChangeHandler}
            isLoading={isLoadingLocations}
            isClearable
          />
          <SelectInput
            label='Kandang'
            placeholder='Pilih Kandang'
            options={kandangOptions}
            value={
              tableFilterState.kandang_id
                ? kandangOptions.find(
                    (option) =>
                      option.value === Number(tableFilterState.kandang_id)
                  ) || null
                : null
            }
            onChange={kandangChangeHandler}
            isLoading={isLoadingKandangs}
            isClearable
          />
        </div>

        <div className='grid md:grid-cols-3 grid-cols-1 gap-4'>
          <TextInput
            label='Rentang Bobot Min (Kg)'
            name='weight_min'
            placeholder='Masukkan bobot minimum'
            value={tableFilterState.weight_min}
            onChange={weightMinChangeHandler}
            type='number'
          />
          <TextInput
            label='Rentang Bobot Max (Kg)'
            name='weight_max'
            placeholder='Masukkan bobot maximum'
            value={tableFilterState.weight_max}
            onChange={weightMaxChangeHandler}
            type='number'
          />
          <DateInput
            label='Periode'
            name='period'
            placeholder='Pilih Periode'
            value={tableFilterState.period}
            onChange={periodChangeHandler}
            required
          />
        </div>

        <div className='grid md:grid-cols-1 grid-cols-1 gap-4'>
          <CheckboxInput
            label='Tampilkan Kandang Tanpa Recording'
            name='show_unrecorded'
            checked={tableFilterState.show_unrecorded}
            onChange={showUnrecordedChangeHandler}
          />
        </div>

        <div className='divider'></div>

        {!isSubmitted ? (
          <div className='mt-6 text-center text-gray-500'>
            Silakan pilih filter dan klik tombol Cari untuk menampilkan data.
          </div>
        ) : isLoading ? (
          <div className='w-full flex flex-row justify-center items-center p-4'>
            <span className='loading loading-spinner loading-xl' />
          </div>
        ) : data.length === 0 ? (
          <div className='mt-6 text-center text-gray-500'>
            Tidak ada data yang dapat ditampilkan...
          </div>
        ) : (
          <Table
            data={data}
            columns={getTableColumns()}
            renderFooter={data.length > 0}
            className={{
              containerClassName: 'w-full mt-6',
              tableWrapperClassName: 'overflow-x-auto mt-4',
              tableClassName: 'w-full table-auto text-sm',
              headerRowClassName: 'border-b border-b-gray-200 bg-gray-50',
              headerColumnClassName:
                'px-4 py-3 text-xs font-semibold text-gray-700 text-left border border-gray-200',
              bodyRowClassName:
                'hover:bg-gray-50 transition-colors border-b border-l border-r border-b-gray-200 border-l-gray-200 border-r-gray-200',
              bodyColumnClassName:
                'px-4 py-3 text-xs text-gray-900 whitespace-nowrap',
              tableFooterClassName:
                'bg-gray-100 font-semibold border border-gray-200',
              footerRowClassName: 'border-t-2 border-gray-300',
              footerColumnClassName:
                'px-4 py-3 text-xs text-gray-900 whitespace-nowrap',
            }}
          />
        )}
      </Card>
    </div>
  );
};

export default HppPerKandangTab;