'use client';

import { useForm } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';

import { productSchema, type ProductFormValues } from '@/lib/validators/products';
import type { ItemTipo } from '@/lib/api/products';

import { Button } from '@/components/ui/button';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { FormField } from '@/components/ui/form-field';
import { Input } from '@/components/ui/input';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Textarea } from '@/components/ui/textarea';

interface ProductFormProps {
  defaultValues: ProductFormValues;
  onSubmit: (values: ProductFormValues) => void;
  onCancel: () => void;
  submitting: boolean;
  submitLabel: string;
}

/** Campos de produto/serviço, compartilhado entre `/app/produtos/novo` e `/app/produtos/:id` (Etapa 16). */
export function ProductForm({ defaultValues, onSubmit, onCancel, submitting, submitLabel }: ProductFormProps) {
  const form = useForm<ProductFormValues>({ resolver: zodResolver(productSchema), defaultValues });

  return (
    <form className="flex max-w-2xl flex-col gap-6" onSubmit={form.handleSubmit(onSubmit)}>
      <Card>
        <CardHeader>
          <CardTitle>Dados do item</CardTitle>
        </CardHeader>
        <CardContent className="flex flex-col gap-4">
          <div className="grid grid-cols-1 gap-4 sm:grid-cols-[160px_1fr]">
            <FormField label="Tipo" id="tipo" error={form.formState.errors.tipo?.message} required>
              <Select
                value={form.watch('tipo')}
                onValueChange={(value) => form.setValue('tipo', value as ItemTipo, { shouldValidate: true })}
              >
                <SelectTrigger id="tipo" className="w-full">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="produto">Produto</SelectItem>
                  <SelectItem value="servico">Serviço</SelectItem>
                </SelectContent>
              </Select>
            </FormField>
            <FormField label="Nome" error={form.formState.errors.nome?.message} required>
              <Input {...form.register('nome')} />
            </FormField>
          </div>

          <FormField label="Descrição" error={form.formState.errors.descricao?.message}>
            <Textarea rows={2} {...form.register('descricao')} />
          </FormField>

          <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
            <FormField label="SKU" helpText="Opcional — precisa ser único no seu catálogo" error={form.formState.errors.sku?.message}>
              <Input {...form.register('sku')} />
            </FormField>
            <FormField label="Unidade" helpText="Ex: un, kg, hora" error={form.formState.errors.unidade?.message}>
              <Input {...form.register('unidade')} />
            </FormField>
          </div>

          <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
            <FormField label="Valor de venda (R$)" error={form.formState.errors.valor_venda?.message} required>
              <Input
                type="number"
                step="0.01"
                min="0"
                {...form.register('valor_venda', { valueAsNumber: true })}
              />
            </FormField>
            <FormField label="Valor de custo (R$)" helpText="Opcional" error={form.formState.errors.valor_custo?.message}>
              <Input
                type="number"
                step="0.01"
                min="0"
                {...form.register('valor_custo', {
                  setValueAs: (v) => (v === '' ? undefined : Number(v)),
                })}
              />
            </FormField>
          </div>

          <FormField label="Recorrente" id="recorrente" error={form.formState.errors.recorrente?.message}>
            <Select
              value={form.watch('recorrente') ? 'true' : 'false'}
              onValueChange={(value) => form.setValue('recorrente', value === 'true', { shouldValidate: true })}
            >
              <SelectTrigger id="recorrente" className="w-full sm:w-48">
                <SelectValue />
              </SelectTrigger>
              <SelectContent>
                <SelectItem value="false">Não</SelectItem>
                <SelectItem value="true">Sim — cobrança recorrente</SelectItem>
              </SelectContent>
            </Select>
          </FormField>
        </CardContent>
      </Card>

      <div className="flex items-center gap-3">
        <Button type="submit" loading={submitting}>
          {submitLabel}
        </Button>
        <Button type="button" variant="outline" onClick={onCancel}>
          Cancelar
        </Button>
      </div>
    </form>
  );
}