import { formatCurrency } from "@erp/core";
import {
  FieldDescription,
  FieldGroup,
  FieldLegend,
  FieldSet,
  Separator,
} from "@repo/shadcn-ui/components";
import { cn } from "@repo/shadcn-ui/lib/utils";
import { ReceiptIcon } from "lucide-react";
import { ComponentProps } from "react";
import { useFormContext, useWatch } from "react-hook-form";
import { useInvoiceContext } from "../../context";
import { useTranslation } from "../../i18n";
import { InvoiceFormData } from "../../schemas";
import { PercentageInputField } from "./items/percentage-input-field";

export const InvoiceTotals = (props: ComponentProps<"fieldset">) => {
  const { t } = useTranslation();
  const { control, getValues } = useFormContext<InvoiceFormData>();
  const { currency_code, language_code, readOnly, taxCatalog } = useInvoiceContext();

  const displayTaxes = useWatch({
    control,
    name: "taxes",
    defaultValue: [],
  });

  const subtotal_amount = useWatch({
    control,
    name: "subtotal_amount",
    defaultValue: 0,
  });

  return (
    <FieldSet {...props}>
      <FieldLegend className='hidden'>
        <ReceiptIcon className='size-6 text-muted-foreground' />
        {t("form_groups.totals.title")}
      </FieldLegend>

      <FieldDescription className='hidden'>{t("form_groups.totals.description")}</FieldDescription>
      <FieldGroup className='grid grid-cols-1 border rounded-lg bg-muted/10 p-4 gap-4'>
        <div className='space-y-1.5'>
          {/* Sección: Subtotal y Descuentos */}
          <div className='flex justify-between text-sm'>
            <span className='text-muted-foreground'>Subtotal sin descuento</span>
            <span className='font-medium tabular-nums text-muted-foreground'>
              {formatCurrency(subtotal_amount, 2, currency_code, language_code)}
            </span>
          </div>

          <div className='flex justify-between text-sm'>
            <div className='flex items-center gap-3'>
              <span className='text-muted-foreground'>Descuento global</span>
              <PercentageInputField
                control={control}
                name={"discount_percentage"}
                readOnly={readOnly}
                inputId={"header-discount-percentage"}
                showSuffix={true}
                className={cn(
                  "w-20 text-right tabular-nums bg-background",
                  "border-input border text-sm shadow-xs"
                )}
              />
            </div>
            <span className='font-medium text-destructive tabular-nums'>
              -{formatCurrency(getValues("discount_amount"), 2, currency_code, language_code)}
            </span>
          </div>

          {/* Sección: Base Imponible */}
          <div className='flex justify-between text-sm'>
            <span className='text-foreground'>Base imponible</span>
            <span className='font-medium tabular-nums'>
              {formatCurrency(getValues("taxable_amount"), 2, currency_code, language_code)}
            </span>
          </div>
        </div>

        <Separator />

        {/* Sección: Impuestos */}
        <div className='space-y-1.5'>
          <h3 className='text-xs font-semibold text-muted-foreground uppercase tracking-wide'>
            Impuestos y retenciones
          </h3>

          {taxCatalog.groups().map((group) => {
            // Filtra impuestos de ese grupo
            const taxesInGroup = displayTaxes?.filter((item) => {
              const tax = taxCatalog.findByCode(item.tax_code).match(
                (t) => t,
                () => undefined
              );
              return tax?.group === group;
            });

            // Si el grupo no tiene impuestos, no renderiza nada
            if (taxesInGroup?.length === 0) return null;

            return (
              <div key={`tax-group-${group}`} className='space-y-1.5 leading-3'>
                {taxesInGroup?.map((item) => {
                  const tax = taxCatalog.findByCode(item.tax_code).match(
                    (t) => t,
                    () => undefined
                  );
                  return (
                    <div
                      key={`${group}:${item.tax_code}`}
                      className='flex items-center justify-between text-sm'
                    >
                      <span className='text-muted-foreground text-sm'>{tax?.name}</span>
                      <span className='font-medium tabular-nums text-sm text-muted-foreground'>
                        {formatCurrency(item.taxes_amount, 2, currency_code, language_code)}
                      </span>
                    </div>
                  );
                })}
              </div>
            );
          })}

          <div className='flex justify-between text-sm mt-3'>
            <span className='text-foreground'>Total de impuestos</span>
            <span className='font-medium tabular-nums'>
              {formatCurrency(getValues("taxes_amount"), 2, currency_code, language_code)}
            </span>
          </div>
        </div>

        <Separator />

        <div className='flex justify-between text-sm '>
          <span className='font-bold text-foreground'>Total de la factura</span>
          <span className='font-bold tabular-nums'>
            {formatCurrency(getValues("total_amount"), 2, currency_code, language_code)}
          </span>
        </div>
      </FieldGroup>
    </FieldSet>
  );
};