'use client';

import * as React from 'react';
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
import { Plus, Trash2, UploadCloud } from 'lucide-react';
import { PageHeader } from '@/components/layout/page-header';
import { RequirePermission } from '@/components/require-permission';
import { DataTable, type DataTableColumn } from '@/components/data-table/data-table';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogFooter,
} from '@/components/ui/dialog';
import { useToast } from '@/components/ui/toast';
import { useAuth } from '@/hooks/use-auth';
import { useDebounce } from '@/hooks/use-debounce';
import { suppressionService } from '@/services/suppression';
import type { SuppressionEntry } from '@/types';
import { errorMessage } from '@/lib/error-message';
import { formatDateTime } from '@/lib/utils';

function AddDialog({ open, onOpenChange }: { open: boolean; onOpenChange: (v: boolean) => void }) {
  const queryClient = useQueryClient();
  const { toast } = useToast();
  const [phone, setPhone] = React.useState('');
  const [reason, setReason] = React.useState('');

  React.useEffect(() => {
    if (open) {
      setPhone('');
      setReason('');
    }
  }, [open]);

  const mutation = useMutation({
    mutationFn: () => suppressionService.add(phone, reason || undefined),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['suppression'] });
      toast({ title: 'Número bloqueado', variant: 'success' });
      onOpenChange(false);
    },
    onError: (err) => toast({ title: 'Erro', description: errorMessage(err), variant: 'destructive' }),
  });

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>Bloquear número</DialogTitle>
        </DialogHeader>
        <form
          onSubmit={(e) => {
            e.preventDefault();
            mutation.mutate();
          }}
          className="flex flex-col gap-4"
        >
          <div className="flex flex-col gap-1.5">
            <Label htmlFor="phone">Telefone</Label>
            <Input id="phone" required value={phone} onChange={(e) => setPhone(e.target.value)} />
          </div>
          <div className="flex flex-col gap-1.5">
            <Label htmlFor="reason">Motivo (opcional)</Label>
            <Input id="reason" value={reason} onChange={(e) => setReason(e.target.value)} />
          </div>
          <DialogFooter>
            <Button type="submit" loading={mutation.isPending}>
              Bloquear
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  );
}

function SuppressionContent() {
  const { can } = useAuth();
  const { toast } = useToast();
  const queryClient = useQueryClient();
  const [search, setSearch] = React.useState('');
  const debouncedSearch = useDebounce(search);
  const [page, setPage] = React.useState(1);
  const [dialogOpen, setDialogOpen] = React.useState(false);
  const fileInputRef = React.useRef<HTMLInputElement>(null);

  const { data, isLoading, isError, refetch } = useQuery({
    queryKey: ['suppression', debouncedSearch, page],
    queryFn: () => suppressionService.query({ search: debouncedSearch || undefined, page, pageSize: 25 }),
  });

  const remove = useMutation({
    mutationFn: ({ id, removalReason }: { id: string; removalReason: string }) =>
      suppressionService.remove(id, removalReason),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['suppression'] });
      toast({ title: 'Número desbloqueado', variant: 'success' });
    },
    onError: (err) => toast({ title: 'Erro', description: errorMessage(err), variant: 'destructive' }),
  });

  const importCsv = useMutation({
    mutationFn: (file: File) => suppressionService.importCsv(file),
    onSuccess: (result) => {
      queryClient.invalidateQueries({ queryKey: ['suppression'] });
      toast({
        title: 'Importação concluída',
        description: `${result.added} adicionados, ${result.invalid} inválidos de ${result.total}.`,
        variant: 'success',
      });
    },
    onError: (err) => toast({ title: 'Erro', description: errorMessage(err), variant: 'destructive' }),
  });

  const columns: DataTableColumn<SuppressionEntry>[] = [
    { key: 'phoneNormalized', header: 'Telefone', render: (r) => r.phoneNormalized },
    { key: 'reason', header: 'Motivo', render: (r) => r.reason ?? '—' },
    { key: 'createdAt', header: 'Adicionado em', render: (r) => formatDateTime(r.createdAt) },
    {
      key: 'actions',
      header: '',
      className: 'text-right',
      render: (r) =>
        can('campaigns.update') ? (
          <Button
            size="icon"
            variant="ghost"
            className="text-destructive"
            onClick={() => {
              const removalReason = window.prompt(
                `Motivo para desbloquear ${r.phoneNormalized} (obrigatório):`,
              );
              if (removalReason && removalReason.trim().length > 0) {
                remove.mutate({ id: r.id, removalReason: removalReason.trim() });
              }
            }}
          >
            <Trash2 className="size-4" />
          </Button>
        ) : null,
    },
  ];

  return (
    <>
      <PageHeader
        title="Lista de Bloqueio"
        description="Números que nunca devem ser discados (suppression list)"
        actions={
          can('campaigns.update') && (
            <div className="flex gap-2">
              <input
                ref={fileInputRef}
                type="file"
                accept=".csv,text/csv"
                className="hidden"
                onChange={(e) => {
                  const file = e.target.files?.[0];
                  if (file) importCsv.mutate(file);
                  e.target.value = '';
                }}
              />
              <Button variant="outline" loading={importCsv.isPending} onClick={() => fileInputRef.current?.click()}>
                <UploadCloud /> Importar CSV
              </Button>
              <Button onClick={() => setDialogOpen(true)}>
                <Plus /> Bloquear número
              </Button>
            </div>
          )
        }
      />
      <DataTable
        columns={columns}
        data={data?.items}
        isLoading={isLoading}
        isError={isError}
        onRetry={() => refetch()}
        rowKey={(r) => r.id}
        searchValue={search}
        onSearchChange={(v) => {
          setSearch(v);
          setPage(1);
        }}
        searchPlaceholder="Buscar por telefone..."
        page={data?.page ?? page}
        pageSize={data?.pageSize ?? 25}
        total={data?.total ?? 0}
        onPageChange={setPage}
        emptyMessage="Nenhum número bloqueado."
      />
      <AddDialog open={dialogOpen} onOpenChange={setDialogOpen} />
    </>
  );
}

export default function SuppressionPage() {
  return (
    <RequirePermission permission="campaigns.view">
      <SuppressionContent />
    </RequirePermission>
  );
}