'use client';

import * as React from 'react';
import type { DateRange } from 'react-day-picker';

import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Textarea } from '@/components/ui/textarea';
import { FormField } from '@/components/ui/form-field';
import {
  InputGroup,
  InputGroupAddon,
  InputGroupInput,
  InputGroupText,
} from '@/components/ui/input-group';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { Combobox } from '@/components/ui/combobox';
import { DatePicker, DateRangePicker } from '@/components/ui/date-picker';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { STATUS_PILL_MAP, StatusPill, type BusinessStatus } from '@/components/ui/status-pill';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import { Skeleton, SkeletonCard, SkeletonText } from '@/components/ui/skeleton';
import { EmptyState } from '@/components/ui/empty-state';
import { DataPagination } from '@/components/ui/data-pagination';
import { ResponsiveDialog } from '@/components/ui/responsive-dialog';
import { DataTable, type DataTableColumn, type DataTableSort } from '@/components/ui/data-table';
import { toast } from '@/lib/toast';

interface DemoCliente {
  id: string;
  nome: string;
  documento: string;
  telefone: string;
  cidade: string;
  status: BusinessStatus;
  valor: number;
}

const DEMO_CLIENTES: DemoCliente[] = [
  {
    id: '1',
    nome: 'Ateliê Boa Vista Ltda',
    documento: '12.345.678/0001-90',
    telefone: '(11) 98765-4321',
    cidade: 'São Paulo/SP',
    status: 'ativo',
    valor: 4230.5,
  },
  {
    id: '2',
    nome: 'Comércio Silva & Filhos',
    documento: '98.765.432/0001-10',
    telefone: '(21) 91234-5678',
    cidade: 'Rio de Janeiro/RJ',
    status: 'inadimplente',
    valor: 1890,
  },
  {
    id: '3',
    nome: 'Padaria Pão Dourado',
    documento: '11.222.333/0001-44',
    telefone: '(31) 99887-6655',
    cidade: 'Belo Horizonte/MG',
    status: 'ativo',
    valor: 750.9,
  },
  {
    id: '4',
    nome: 'Distribuidora Nordeste',
    documento: '55.666.777/0001-88',
    telefone: '(85) 98111-2233',
    cidade: 'Fortaleza/CE',
    status: 'trial',
    valor: 0,
  },
  {
    id: '5',
    nome: 'Oficina Central Auto Peças',
    documento: '22.333.444/0001-55',
    telefone: '(41) 97654-3210',
    cidade: 'Curitiba/PR',
    status: 'suspenso',
    valor: 320,
  },
];

const CLIENTE_COLUMNS: DataTableColumn<DemoCliente>[] = [
  { id: 'nome', header: 'Cliente', primary: true, sortable: true, cell: (row) => row.nome },
  { id: 'documento', header: 'Documento', cell: (row) => row.documento },
  { id: 'telefone', header: 'Telefone', cell: (row) => row.telefone },
  { id: 'cidade', header: 'Cidade', cell: (row) => row.cidade },
  {
    id: 'valor',
    header: 'Valor em aberto',
    sortable: true,
    className: 'text-right',
    cell: (row) => row.valor.toLocaleString('pt-BR', { style: 'currency', currency: 'BRL' }),
  },
  {
    id: 'status',
    header: 'Status',
    primary: true,
    cell: (row) => <StatusPill status={row.status} />,
  },
];

const PRODUTO_OPTIONS = [
  { value: 'p1', label: 'Consultoria mensal' },
  { value: 'p2', label: 'Licença de software' },
  { value: 'p3', label: 'Suporte técnico avançado' },
  { value: 'p4', label: 'Treinamento presencial' },
];

function Section({ title, children }: { title: string; children: React.ReactNode }) {
  return (
    <section className="flex flex-col gap-4 border-t border-border pt-8 first:border-0 first:pt-0">
      <h2 className="text-lg font-semibold text-foreground">{title}</h2>
      {children}
    </section>
  );
}

export function ComponentesShowcase() {
  const [tableLoading, setTableLoading] = React.useState(false);
  const [tableEmpty, setTableEmpty] = React.useState(false);
  const [sort, setSort] = React.useState<DataTableSort | undefined>();
  const [page, setPage] = React.useState(1);
  const [dialogOpen, setDialogOpen] = React.useState(false);
  const [comboboxValue, setComboboxValue] = React.useState<string>();
  const [date, setDate] = React.useState<Date>();
  const [range, setRange] = React.useState<DateRange>();
  const [paginationDemoPage, setPaginationDemoPage] = React.useState(1);

  const sortedData = React.useMemo(() => {
    if (!sort) return DEMO_CLIENTES;
    const factor = sort.direction === 'asc' ? 1 : -1;
    return [...DEMO_CLIENTES].sort((a, b) => {
      const av = a[sort.columnId as keyof DemoCliente];
      const bv = b[sort.columnId as keyof DemoCliente];
      if (typeof av === 'number' && typeof bv === 'number') return (av - bv) * factor;
      return String(av).localeCompare(String(bv)) * factor;
    });
  }, [sort]);

  return (
    <main className="mx-auto flex max-w-5xl flex-col gap-10 p-6 pb-24 sm:p-10">
      <header className="flex flex-col gap-1">
        <p className="text-sm text-muted-foreground">/dev/componentes — Etapa 12</p>
        <h1 className="text-2xl font-semibold text-foreground">
          Design system — SeConectai Vendas
        </h1>
        <p className="text-sm text-muted-foreground">
          Rota só de desenvolvimento (404 em produção). Redimensione a janela para ver o
          comportamento responsivo.
        </p>
      </header>

      <Section title="Button">
        <div className="flex flex-wrap items-center gap-3">
          <Button variant="primary">Primary</Button>
          <Button variant="secondary">Secondary</Button>
          <Button variant="destructive">Destructive</Button>
          <Button variant="ghost">Ghost</Button>
          <Button variant="outline">Outline</Button>
        </div>
        <div className="flex flex-wrap items-center gap-3">
          <Button size="sm">Small (denso, ex: linha de tabela)</Button>
          <Button size="md">Medium (padrão, 44px)</Button>
          <Button size="lg">Large</Button>
        </div>
        <div className="flex flex-wrap items-center gap-3">
          <Button loading>Salvando…</Button>
          <Button disabled>Desabilitado</Button>
        </div>
      </Section>

      <Section title="Input / Textarea / FormField">
        <div className="grid max-w-md gap-4">
          <FormField label="Nome fantasia" helpText="Como o cliente é conhecido no dia a dia.">
            <Input placeholder="Ex: Padaria Pão Dourado" />
          </FormField>
          <FormField label="E-mail" error="E-mail inválido" required>
            <Input type="email" defaultValue="nao-e-um-email" />
          </FormField>
          <FormField label="Valor de venda">
            <InputGroup>
              <InputGroupAddon>
                <InputGroupText>R$</InputGroupText>
              </InputGroupAddon>
              <InputGroupInput placeholder="0,00" inputMode="decimal" />
            </InputGroup>
          </FormField>
          <FormField label="Observações">
            <Textarea placeholder="Notas internas sobre o cliente…" />
          </FormField>
        </div>
      </Section>

      <Section title="Select / Combobox (busca)">
        <div className="grid max-w-md gap-4">
          <FormField label="Papel do usuário">
            <Select defaultValue="tenant_admin">
              <SelectTrigger>
                <SelectValue />
              </SelectTrigger>
              <SelectContent>
                <SelectItem value="tenant_admin">Administrador</SelectItem>
                <SelectItem value="vendedor">Vendedor</SelectItem>
                <SelectItem value="financeiro">Financeiro</SelectItem>
              </SelectContent>
            </Select>
          </FormField>
          <FormField label="Produto/serviço" helpText="Busca por nome ou SKU.">
            <Combobox
              options={PRODUTO_OPTIONS}
              value={comboboxValue}
              onChange={setComboboxValue}
              placeholder="Selecionar produto…"
              searchPlaceholder="Buscar produto…"
            />
          </FormField>
        </div>
      </Section>

      <Section title="DatePicker">
        <div className="grid max-w-md gap-4 sm:grid-cols-2">
          <FormField label="Data de vencimento">
            <DatePicker value={date} onChange={setDate} />
          </FormField>
          <FormField label="Período">
            <DateRangePicker value={range} onChange={setRange} />
          </FormField>
        </div>
      </Section>

      <Section title="Table (responsiva — vira Cards abaixo de 768px)">
        <div className="flex flex-wrap items-center gap-2">
          <Button variant="outline" size="sm" onClick={() => setTableLoading((v) => !v)}>
            {tableLoading ? 'Parar loading' : 'Simular loading'}
          </Button>
          <Button variant="outline" size="sm" onClick={() => setTableEmpty((v) => !v)}>
            {tableEmpty ? 'Mostrar dados' : 'Simular vazio'}
          </Button>
        </div>
        <DataTable
          columns={CLIENTE_COLUMNS}
          data={tableEmpty ? [] : sortedData}
          keyField={(row) => row.id}
          loading={tableLoading}
          sort={sort}
          onSortChange={setSort}
          emptyTitle="Nenhum cliente cadastrado ainda"
          emptyDescription="Cadastre o primeiro cliente para começar a vender."
          emptyAction={<Button size="sm">Cadastrar cliente</Button>}
          rowActions={() => (
            <Button variant="ghost" size="sm">
              Ver
            </Button>
          )}
          pagination={{ page, limit: 5, total: 23, onPageChange: setPage }}
        />
      </Section>

      <Section title="Pagination (isolada)">
        <DataPagination
          page={paginationDemoPage}
          limit={10}
          total={97}
          onPageChange={setPaginationDemoPage}
        />
      </Section>

      <Section title="Modal / Sheet responsivo">
        <p className="text-sm text-muted-foreground">
          Vira modal centralizado no desktop e bottom sheet no mobile (mesmo breakpoint da Table).
        </p>
        <Button className="w-fit" onClick={() => setDialogOpen(true)}>
          Abrir exemplo
        </Button>
        <ResponsiveDialog
          open={dialogOpen}
          onOpenChange={setDialogOpen}
          title="Cadastro rápido de cliente"
          description="Usado no fluxo de nova venda quando o cliente ainda não existe."
          footer={
            <>
              <Button variant="outline" onClick={() => setDialogOpen(false)}>
                Cancelar
              </Button>
              <Button onClick={() => setDialogOpen(false)}>Salvar</Button>
            </>
          }
        >
          <div className="flex flex-col gap-4 px-4 pb-4 sm:px-0 sm:pb-0">
            <FormField label="Nome">
              <Input placeholder="Nome do cliente" />
            </FormField>
            <FormField label="Telefone/WhatsApp">
              <Input placeholder="(00) 00000-0000" />
            </FormField>
          </div>
        </ResponsiveDialog>
      </Section>

      <Section title="Toast">
        <div className="flex flex-wrap gap-2">
          <Button
            variant="outline"
            size="sm"
            onClick={() => toast.success('Cliente salvo com sucesso.')}
          >
            Sucesso
          </Button>
          <Button
            variant="outline"
            size="sm"
            onClick={() => toast.error('Não foi possível salvar. Tente novamente.')}
          >
            Erro
          </Button>
          <Button
            variant="outline"
            size="sm"
            onClick={() => toast.warning('Limite do plano quase atingido.')}
          >
            Aviso
          </Button>
          <Button
            variant="outline"
            size="sm"
            onClick={() => toast.info('Sessão renovada automaticamente.')}
          >
            Info
          </Button>
        </div>
      </Section>

      <Section title="Badge / StatusPill">
        <div className="flex flex-wrap gap-2">
          <Badge>Default</Badge>
          <Badge variant="secondary">Secondary</Badge>
          <Badge variant="destructive">Destructive</Badge>
          <Badge variant="outline">Outline</Badge>
        </div>
        <div className="flex flex-wrap gap-2">
          {(Object.keys(STATUS_PILL_MAP) as BusinessStatus[]).map((status) => (
            <StatusPill key={status} status={status} />
          ))}
        </div>
      </Section>

      <Section title="Card">
        <Card className="max-w-sm">
          <CardHeader>
            <CardTitle>Total recebido no mês</CardTitle>
            <CardDescription>Atualizado há 2 minutos</CardDescription>
          </CardHeader>
          <CardContent>
            <p className="text-2xl font-semibold tabular-nums text-foreground">R$ 18.420,00</p>
          </CardContent>
        </Card>
      </Section>

      <Section title="EmptyState">
        <EmptyState
          title="Nenhuma venda registrada"
          description="As vendas confirmadas aparecerão aqui."
          action={<Button size="sm">Nova venda</Button>}
        />
      </Section>

      <Section title="Skeleton">
        <div className="flex max-w-md flex-col gap-3">
          <SkeletonText />
          <SkeletonText className="w-2/3" />
          <SkeletonCard />
          <Skeleton className="size-11 rounded-full" />
        </div>
      </Section>

      <Section title="Tabs">
        <Tabs defaultValue="itens" className="max-w-md">
          <TabsList>
            <TabsTrigger value="itens">Itens</TabsTrigger>
            <TabsTrigger value="parcelas">Parcelas</TabsTrigger>
            <TabsTrigger value="historico">Histórico</TabsTrigger>
          </TabsList>
          <TabsContent value="itens" className="text-sm text-muted-foreground">
            Lista de itens da venda.
          </TabsContent>
          <TabsContent value="parcelas" className="text-sm text-muted-foreground">
            Lista de parcelas geradas.
          </TabsContent>
          <TabsContent value="historico" className="text-sm text-muted-foreground">
            Histórico de mudanças de status.
          </TabsContent>
        </Tabs>
      </Section>
    </main>
  );
}