'use client';

import * as React from "react";
import {
  useReactTable,
  getCoreRowModel,
  getSortedRowModel,
  getFilteredRowModel,
} from "@tanstack/react-table";
import { useVirtualizer } from "@tanstack/react-virtual";
import { Input } from "@/components/ui/input";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogFooter,
} from "@/components/ui/dialog";
import {
  Select,
  SelectTrigger,
  SelectValue,
  SelectContent,
  SelectItem,
} from "@/components/ui/select";
import { Download, Filter, X } from "lucide-react";
import * as XLSX from 'xlsx';

interface AnaliticoItem {
  codigo_grupo: string;
  codigo_subgrupo: string;
  codigo_fornecedor: string;
  nome_fornecedor: string;
  id: number;
  codfilial: string;
  recnum: number;
  data_competencia: string;
  data_vencimento: string;
  data_pagamento: string;
  data_caixa: string;
  codigo_conta: string;
  conta: string;
  codigo_centrocusto: string;
  valor: number;
  historico: string;
  historico2: string;
  created_at: string;
  updated_at: string;
}

interface AnaliticoProps {
  filtros: {
    dataInicio: string;
    dataFim: string;
    centroCusto?: string;
    codigoGrupo?: string;
    codigoSubgrupo?: string;
    codigoConta?: string;
  };
}

export default function AnaliticoComponent({ filtros }: AnaliticoProps) {
  const [data, setData] = React.useState<AnaliticoItem[]>([]);
  const [loading, setLoading] = React.useState(false);
  const [globalFilter, setGlobalFilter] = React.useState("");
  const [columnFilters, setColumnFilters] = React.useState<any[]>([]);
  const [open, setOpen] = React.useState(false);
  const [conditions, setConditions] = React.useState([{ column: "", operator: "contains", value: "" }]);

  const fetchData = React.useCallback(async () => {
    // Só faz a requisição se tiver dataInicio e dataFim
    if (!filtros.dataInicio || !filtros.dataFim) {
      setData([]);
      return;
    }

    setLoading(true);
    try {
      const params = new URLSearchParams({
        dataInicio: filtros.dataInicio,
        dataFim: filtros.dataFim,
        ...(filtros.centroCusto && { centroCusto: filtros.centroCusto }),
        ...(filtros.codigoGrupo && { codigoGrupo: filtros.codigoGrupo }),
        ...(filtros.codigoSubgrupo && {
          codigoSubgrupo: filtros.codigoSubgrupo,
        }),
        ...(filtros.codigoConta && { codigoConta: filtros.codigoConta }),
      });

      const response = await fetch(`/api/analitico?${params}`);
      if (response.ok) {
        const result = await response.json();
        setData(result as AnaliticoItem[]);
      } else {
        console.error('Erro ao buscar dados:', await response.text());
      }
    } catch (error) {
      console.error('Erro ao buscar dados:', error);
    } finally {
      setLoading(false);
    }
  }, [filtros]);

  React.useEffect(() => {
    fetchData();
  }, [fetchData]);

  const columns = React.useMemo(
    () => [
      { 
        accessorKey: "data_competencia", 
        header: "Data Comp.", 
        filterFn: "advancedText",
        cell: ({ getValue }: { getValue: () => string }) => {
          const value = getValue();
          return new Date(value).toLocaleDateString('pt-BR');
        }
      },
      { 
        accessorKey: "data_vencimento", 
        header: "Data Venc.", 
        filterFn: "advancedText",
        cell: ({ getValue }: { getValue: () => string }) => {
          const value = getValue();
          return new Date(value).toLocaleDateString('pt-BR');
        }
      },
      { 
        accessorKey: "data_caixa", 
        header: "Data Caixa", 
        filterFn: "advancedText",
        cell: ({ getValue }: { getValue: () => string }) => {
          const value = getValue();
          return new Date(value).toLocaleDateString('pt-BR');
        }
      },
      { accessorKey: "codigo_fornecedor", header: "Cód. Fornec.", filterFn: "advancedText" },
      { accessorKey: "nome_fornecedor", header: "Fornecedor", filterFn: "advancedText" },
      { accessorKey: "codigo_centrocusto", header: "Cód. Centro", filterFn: "advancedText" },
      { accessorKey: "codigo_conta", header: "Cód. Conta", filterFn: "advancedText" },
      { accessorKey: "conta", header: "Conta", filterFn: "advancedText" },
      { 
        accessorKey: "valor", 
        header: "Valor", 
        filterFn: "advancedText",
        cell: ({ getValue }: { getValue: () => number }) => {
          const value = getValue();
          const formatted = new Intl.NumberFormat('pt-BR', {
            style: 'currency',
            currency: 'BRL',
          }).format(value);
          const isNegative = value < 0;
          return (
            <span className={isNegative ? 'text-red-600' : 'text-gray-900'}>
              {formatted}
            </span>
          );
        }
      },
      { accessorKey: "historico", header: "Histórico", filterFn: "advancedText" },
      { accessorKey: "historico2", header: "Histórico 2", filterFn: "advancedText" },
      { accessorKey: "recnum", header: "Recnum", filterFn: "advancedText" },
    ],
    []
  );

  const filterFns = React.useMemo(
    () => ({
      advancedText: (row: any, columnId: string, filters: any[]) => {
        if (!filters || filters.length === 0) return true;
  
        // Se veio um único filtro (objeto), transforma em array
        const conds = Array.isArray(filters) ? filters : [filters];
  
        // A coluna deve atender a todas as condições aplicáveis a ela
        return conds.every((filter) => {
          const raw = row.getValue(columnId);
          const v = raw == null ? "" : String(raw);
          const op = filter.operator;
          const q = (filter.value ?? "").toString();
          const a = v.toLowerCase();
          const b = q.toLowerCase();
  
          switch (op) {
            case "contains":
              return a.includes(b);
            case "equals":
              return a === b;
            case "startsWith":
              return a.startsWith(b);
            case "endsWith":
              return a.endsWith(b);
            case "empty":
              return a.length === 0;
            case "notEmpty":
              return a.length > 0;
            default:
              return true;
          }
        });
      },
    }),
    []
  );
  

  const table = useReactTable({
    data,
    columns,
    state: { globalFilter, columnFilters },
    onGlobalFilterChange: setGlobalFilter,
    onColumnFiltersChange: setColumnFilters,
    filterFns,
    getCoreRowModel: getCoreRowModel(),
    getFilteredRowModel: getFilteredRowModel(),
    getSortedRowModel: getSortedRowModel(),
  });

  const parentRef = React.useRef<HTMLDivElement>(null);
  const rowVirtualizer = useVirtualizer({
    count: table.getRowModel().rows.length,
    getScrollElement: () => parentRef.current,
    estimateSize: () => 36,
    overscan: 20,
  });

  const virtualRows = rowVirtualizer.getVirtualItems();


  const applyFilters = () => {
    // Agrupar múltiplas condições por coluna
    const grouped: Record<string, any[]> = {};
  
    conditions.forEach((c) => {
      if (
        c.column &&
        (c.operator === "empty" || c.operator === "notEmpty" || (c.value ?? "") !== "")
      ) {
        if (!grouped[c.column]) grouped[c.column] = [];
        grouped[c.column].push({ operator: c.operator, value: c.value });
      }
    });
  
    // Converte em formato aceito pelo TanStack
    const filters = Object.keys(grouped).map((col) => ({
      id: col,
      value: grouped[col],
    }));
  
    setColumnFilters(filters);
    setOpen(false);
  };

  const clearFilters = () => {
    setConditions([{ column: "", operator: "contains", value: "" }]);
    setColumnFilters([]);
    setGlobalFilter("");
  };

  const totalValor = data.reduce((sum, item) => {
    const valor =
      typeof item.valor === 'string' ? parseFloat(item.valor) : item.valor;
    return sum + (isNaN(valor) ? 0 : valor);
  }, 0);

  const exportToExcel = () => {
    if (data.length === 0) return;

    // Preparar dados para exportação
    const exportData = data.map((item) => ({
      'Data Competência': new Date(item.data_competencia).toLocaleDateString(
        'pt-BR'
      ),
      'Data Vencimento': new Date(item.data_vencimento).toLocaleDateString(
        'pt-BR'
      ),
      'Data Caixa': new Date(item.data_caixa).toLocaleDateString('pt-BR'),
      'Código Fornecedor': item.codigo_fornecedor,
      Fornecedor: item.nome_fornecedor,
      'Código Centro Custo': item.codigo_centrocusto,
      'Centro Custo': item.codigo_centrocusto, // Assumindo que é o mesmo valor
      'Código Conta': item.codigo_conta,
      Conta: item.conta,
      Valor:
        typeof item.valor === 'string' ? parseFloat(item.valor) : item.valor,
      Histórico: item.historico,
      'Histórico 2': item.historico2,
      Recnum: item.recnum,
    }));

    // Criar workbook
    const wb = XLSX.utils.book_new();
    const ws = XLSX.utils.json_to_sheet(exportData);

    // Adicionar resumo na segunda aba
    const resumoData = [
      { Métrica: 'Total de Registros', Valor: data.length },
      { Métrica: 'Valor Total', Valor: totalValor },
    ];
    const wsResumo = XLSX.utils.json_to_sheet(resumoData);

    // Adicionar abas ao workbook
    XLSX.utils.book_append_sheet(wb, ws, 'Dados Analíticos');
    XLSX.utils.book_append_sheet(wb, wsResumo, 'Resumo');

    // Gerar nome do arquivo com data e hora
    const now = new Date();
    const timestamp = now.toISOString().slice(0, 19).replace(/:/g, '-');
    const fileName = `analitico_${timestamp}.xlsx`;

    // Fazer download
    XLSX.writeFile(wb, fileName);
  };

  return (
    <div className="w-full max-w-7xl mx-auto p-6">
      {/* Header Section */}
      <div className="mb-6">
        <div className="flex items-center gap-3 mb-4">
          <div className="w-12 h-12 bg-gradient-to-r from-blue-600 to-indigo-600 rounded-xl flex items-center justify-center shadow-lg">
            <svg className="w-7 h-7 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z" />
            </svg>
          </div>
          <div>
            <h1 className="text-2xl font-bold text-gray-900">Análise Analítica</h1>
            <p className="text-sm text-gray-500">Relatório detalhado de transações</p>
          </div>
        </div>
        
         {/* Controls */}
         <div className="flex gap-3 flex-wrap">
           <Input
             placeholder="Filtrar tudo..."
             value={globalFilter ?? ""}
             onChange={(e: React.ChangeEvent<HTMLInputElement>) => setGlobalFilter(e.target.value)}
             className="w-64 bg-white border-gray-300 focus:border-blue-500 focus:ring-blue-500"
           />
           <Button 
             variant="outline" 
             onClick={() => setOpen(true)}
             className="bg-white border-gray-300 hover:bg-blue-50 hover:border-blue-300 text-gray-700"
           >
             <Filter className="w-4 h-4 mr-2" />
             Filtros Avançados
           </Button>
           {(columnFilters.length > 0 || globalFilter) && (
             <Button 
               variant="outline" 
               onClick={clearFilters}
               className="bg-white border-gray-300 hover:bg-red-50 hover:border-red-300 text-gray-700"
             >
               <X className="w-4 h-4 mr-2" />
               Limpar Filtros
             </Button>
           )}
         {data.length > 0 && (
           <Button
             onClick={exportToExcel}
             variant="outline"
             size="sm"
               className="flex items-center gap-2 bg-white border-gray-300 hover:bg-green-50 hover:border-green-300 text-gray-700"
           >
             <Download className="h-4 w-4" />
             Exportar XLSX
           </Button>
         )}
         </div>
      </div>

      {/* Table Container */}
      <div className="bg-white rounded-xl shadow-lg border border-gray-200 overflow-x-auto">
        <div className="min-w-[1200px]">
        {/* Table Header */}
        <div className="bg-gradient-to-r from-blue-50 to-indigo-50 border-b border-gray-200 sticky top-0 z-20">
          <div className="grid grid-cols-12 gap-4 px-4 py-3 text-xs font-semibold text-gray-700 uppercase tracking-wide">
            <div className="col-span-1">Data Comp.</div>
            <div className="col-span-1">Data Venc.</div>
            <div className="col-span-1">Data Caixa</div>
            <div className="col-span-1">Cód. Fornec.</div>
            <div className="col-span-2">Fornecedor</div>
            <div className="col-span-1">Cód. Centro</div>
            <div className="col-span-1">Cód. Conta</div>
            <div className="col-span-2">Conta</div>
            <div className="col-span-1 text-right">Valor</div>
            <div className="col-span-1">Recnum</div>
          </div>
        </div>

        {/* Table Body */}
        <div 
          ref={parentRef} 
          className="max-h-[500px] overflow-auto scrollbar-thin scrollbar-thumb-gray-300 scrollbar-track-gray-100 hover:scrollbar-thumb-gray-400"
          style={{
            scrollbarWidth: 'thin',
            scrollbarColor: '#cbd5e0 #f7fafc'
          }}
        >
          {loading ? (
            <div className="flex items-center justify-center h-64">
              <div className="text-center">
                <div className="w-8 h-8 border-2 border-blue-600 border-t-transparent rounded-full animate-spin mx-auto mb-2"></div>
                <p className="text-gray-500">Carregando dados...</p>
              </div>
            </div>
          ) : virtualRows.length === 0 ? (
            <div className="flex items-center justify-center h-64">
              <div className="text-center">
                <div className="w-16 h-16 bg-gray-100 rounded-full flex items-center justify-center mx-auto mb-4">
                  <svg className="w-8 h-8 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                  </svg>
                </div>
                <p className="text-gray-500">Nenhum dado encontrado</p>
              </div>
            </div>
          ) : (
            <div className="relative" style={{ height: `${rowVirtualizer.getTotalSize()}px` }}>
              {virtualRows.map((virtualRow) => {
                const row = table.getRowModel().rows[virtualRow.index];
                    return (
                  <div
                    key={row.id}
                    className="absolute top-0 left-0 w-full grid grid-cols-12 gap-4 px-4 py-3 text-sm border-b border-gray-100 hover:bg-gray-50 transition-colors"
                    style={{ transform: `translateY(${virtualRow.start}px)` }}
                  >
                    <div className="col-span-1 text-gray-600">{new Date(row.original.data_competencia).toLocaleDateString('pt-BR')}</div>
                    <div className="col-span-1 text-gray-600">{new Date(row.original.data_vencimento).toLocaleDateString('pt-BR')}</div>
                    <div className="col-span-1 text-gray-600">{new Date(row.original.data_caixa).toLocaleDateString('pt-BR')}</div>
                    <div className="col-span-1 font-medium text-gray-900">{row.original.codigo_fornecedor}</div>
                    <div className="col-span-2 text-gray-700 truncate" title={row.original.nome_fornecedor}>{row.original.nome_fornecedor}</div>
                    <div className="col-span-1 text-gray-600">{row.original.codigo_centrocusto}</div>
                    <div className="col-span-1 text-gray-600">{row.original.codigo_conta}</div>
                    <div className="col-span-2 text-gray-700 truncate" title={row.original.conta}>{row.original.conta}</div>
                    <div className={`col-span-1 text-right font-semibold ${row.original.valor < 0 ? 'text-red-600' : 'text-gray-900'}`}>
                      {new Intl.NumberFormat('pt-BR', { style: 'currency', currency: 'BRL' }).format(row.original.valor)}
                </div>
                    <div className="col-span-1 text-gray-500">{row.original.recnum}</div>
                </div>
                );
              })}
              </div>
          )}
        </div>

        {/* Summary Footer - Integrado */}
        {data.length > 0 && (
          <div className="bg-gradient-to-r from-blue-50 to-indigo-50 border-t border-blue-200 p-6">
            <div className="flex justify-between items-center">
              <div className="flex items-center gap-4">
                <div className="w-12 h-12 bg-gradient-to-r from-blue-600 to-indigo-600 rounded-lg flex items-center justify-center">
                  <svg className="w-6 h-6 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 7h6m0 10v-3m-3 3h.01M9 17h.01M9 14h.01M12 14h.01M15 11h.01M12 11h.01M9 11h.01M7 21h10a2 2 0 002-2V5a2 2 0 00-2-2H7a2 2 0 00-2 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z" />
                  </svg>
                </div>
                <div>
                  <h3 className="text-lg font-bold text-gray-900">
                    Total de Registros: <span className="text-blue-600">{table.getRowModel().rows.length}</span>
                  </h3>
                  <p className="text-sm text-gray-600">Transações encontradas</p>
                </div>
              </div>
              <div className="text-right">
                <h3 className="text-lg font-bold">
                  <span className={totalValor < 0 ? 'text-red-600' : 'text-green-600'}>
                    Valor Total: {new Intl.NumberFormat('pt-BR', {
                      style: 'currency',
                      currency: 'BRL',
                    }).format(totalValor)}
                  </span>
                </h3>
                <p className="text-sm text-gray-600">Soma de todos os valores</p>
              </div>
            </div>
          </div>
        )}
        </div>
      </div>

      {/* Advanced Filters Dialog */}
      <Dialog open={open} onOpenChange={setOpen}>
        <DialogContent className="max-w-2xl w-full mx-4 bg-white">
          <DialogHeader className="pb-4">
            <DialogTitle className="text-xl font-semibold text-gray-900">Filtros Avançados</DialogTitle>
          </DialogHeader>

          <div className="space-y-4 max-h-96 overflow-y-auto bg-white">
            {conditions.map((cond, idx) => (
              <div key={idx} className="flex gap-3 items-start p-4 bg-gray-50 rounded-lg border border-gray-200">
                <div className="flex-1">
                  <label className="block text-sm font-medium text-gray-700 mb-1">
                    Coluna
                  </label>
                  <Select
                    value={cond.column}
                    onValueChange={(v: string) => {
                      const next = [...conditions];
                      next[idx].column = v;
                      setConditions(next);
                    }}
                  >
                    <SelectTrigger className="w-full bg-white border-gray-300">
                      <SelectValue placeholder="Selecione a coluna" />
                    </SelectTrigger>
                    <SelectContent>
                    {columns.map((col) => (
                      <SelectItem key={col.accessorKey} value={col.accessorKey}>
                        {col.header}
                      </SelectItem>
                    ))}
                    </SelectContent>
                  </Select>
                </div>

                <div className="flex-1">
                  <label className="block text-sm font-medium text-gray-700 mb-1">
                    Operador
                  </label>
                  <Select
                    value={cond.operator}
                    onValueChange={(v: string) => {
                      const next = [...conditions];
                      next[idx].operator = v;
                      if (v === "empty" || v === "notEmpty") next[idx].value = "";
                      setConditions(next);
                    }}
                  >
                    <SelectTrigger className="w-full bg-white border-gray-300">
                      <SelectValue placeholder="Selecione o operador" />
                    </SelectTrigger>
                    <SelectContent>
                      <SelectItem value="contains">contém</SelectItem>
                      <SelectItem value="equals">igual a</SelectItem>
                      <SelectItem value="startsWith">começa com</SelectItem>
                      <SelectItem value="endsWith">termina com</SelectItem>
                      <SelectItem value="empty">está vazio</SelectItem>
                      <SelectItem value="notEmpty">não está vazio</SelectItem>
                    </SelectContent>
                  </Select>
                </div>

                {!(cond.operator === "empty" || cond.operator === "notEmpty") && (
                  <div className="flex-1">
                    <label className="block text-sm font-medium text-gray-700 mb-1">
                      Valor
                    </label>
                    <Input
                      value={cond.value}
                      onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
                        const next = [...conditions];
                        next[idx].value = e.target.value;
                        setConditions(next);
                      }}
                      placeholder="Digite o valor"
                      className="w-full bg-white border-gray-300"
                    />
                  </div>
                )}

                {conditions.length > 1 && (
                  <div className="flex items-end">
                    <Button
                      variant="outline"
                      size="sm"
                      onClick={() => {
                        const next = conditions.filter((_, i) => i !== idx);
                        setConditions(next);
                      }}
                      className="mt-6 text-red-600 hover:text-red-700 hover:bg-red-50 border-red-200"
                    >
                      ✕
                    </Button>
                  </div>
                )}
              </div>
            ))}

            <div className="flex justify-center pt-2">
              <Button
                variant="outline"
                onClick={() =>
                  setConditions((prev) => [
                    ...prev,
                    { column: "", operator: "contains", value: "" },
                  ])
                }
                className="flex items-center gap-2 text-blue-600 hover:text-blue-700 hover:bg-blue-50 border-blue-200"
              >
                <span className="text-lg">+</span>
                Adicionar condição
              </Button>
            </div>
          </div>

          <DialogFooter className="flex gap-3 pt-6 border-t border-gray-200">
            <Button 
              variant="outline" 
              onClick={clearFilters}
              className="flex-1 border-gray-300 text-gray-700 hover:bg-gray-50"
            >
              Limpar todos
            </Button>
            <Button 
              onClick={applyFilters}
              className="flex-1 bg-blue-600 hover:bg-blue-700 text-white"
            >
              Aplicar filtros
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </div>
  );
}