"use client";

import { useState } from "react";
import { toast } from "sonner";
import { ResponsiveDialog } from "@/components/responsive-dialog";
import { Button } from "@/components/ui/button";
import { Checkbox } from "@/components/ui/checkbox";
import { Field, FieldDescription, FieldError, FieldGroup, FieldLabel } from "@/components/ui/field";
import { Input } from "@/components/ui/input";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { tr } from "@/i18n/tr";
import { todayIstanbul } from "@/shared/dates";
import { parseMoney } from "@/shared/money";
import { formatUnitPrice, unitPrice } from "@/shared/prices";
import { addProductPriceAction } from "../actions";
import type { PriceProductOption } from "../options";
import type { StoreRef } from "../service";
import { StoreDot } from "./offers-list";

const t = tr.productPrices;
type Errors = Record<string, string | undefined>;

/** Elle fiyat girişi: ürün (sabit olabilir), mağaza, tarih, paket fiyatı, kampanya. */
export function PriceFormDialog({
  products,
  stores,
  productId,
  onClose,
}: {
  products: PriceProductOption[];
  stores: StoreRef[];
  /** Ürün sayfasından açılınca sabit. */
  productId?: string;
  onClose: () => void;
}) {
  const [v, setV] = useState({
    productId: productId ?? (products.length === 1 ? products[0]!.id : ""),
    storeId: "",
    date: todayIstanbul(),
    price: "",
    isPromo: false,
    promoUntil: "",
    note: "",
  });
  const [errors, setErrors] = useState<Errors>({});
  const [busy, setBusy] = useState(false);
  const set = <K extends keyof typeof v>(k: K, x: (typeof v)[K]) => setV((s) => ({ ...s, [k]: x }));
  const product = products.find((p) => p.id === v.productId);
  const minor = parseMoney(v.price);
  const preview =
    product?.inTypeUnit && minor && minor > 0
      ? formatUnitPrice(unitPrice(minor, product.inTypeUnit), product.typeUnit)
      : null;
  const f = t.fields;

  async function submit(e: React.FormEvent) {
    e.preventDefault();
    setBusy(true);
    const r = await addProductPriceAction(v);
    setBusy(false);
    if (r.ok) {
      toast.success(t.toast.saved);
      onClose();
    } else setErrors({ ...r.fieldErrors, root: r.fieldErrors ? undefined : r.error });
  }

  return (
    <ResponsiveDialog
      open
      onOpenChange={(o) => !o && onClose()}
      title={t.addTitle}
      description={product ? `${product.label} · ${product.packageLabel}` : undefined}
      footer={
        <>
          <Button variant="outline" type="button" onClick={onClose}>
            {tr.common.cancel}
          </Button>
          <Button type="submit" form="price-form" disabled={busy}>
            {tr.common.save}
          </Button>
        </>
      }
    >
      <form id="price-form" onSubmit={submit} noValidate>
        <FieldGroup>
          {productId ? null : (
            <Field data-invalid={Boolean(errors.productId)}>
              <FieldLabel htmlFor="pp-product">{f.product}</FieldLabel>
              <Select value={v.productId} onValueChange={(x) => set("productId", x)}>
                <SelectTrigger
                  id="pp-product"
                  className="w-full"
                  aria-invalid={Boolean(errors.productId)}
                >
                  <SelectValue placeholder={t.validation.product} />
                </SelectTrigger>
                <SelectContent>
                  {products.map((p) => (
                    <SelectItem key={p.id} value={p.id}>
                      {p.label}{" "}
                      <span className="text-xs text-muted-foreground">({p.packageLabel})</span>
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
              {errors.productId ? <FieldError>{errors.productId}</FieldError> : null}
            </Field>
          )}
          <Field data-invalid={Boolean(errors.storeId)}>
            <FieldLabel htmlFor="pp-store">{f.store}</FieldLabel>
            <Select value={v.storeId} onValueChange={(x) => set("storeId", x)}>
              <SelectTrigger
                id="pp-store"
                className="w-full"
                aria-invalid={Boolean(errors.storeId)}
              >
                <SelectValue placeholder={t.validation.store} />
              </SelectTrigger>
              <SelectContent>
                {stores.map((s) => (
                  <SelectItem key={s.id} value={s.id}>
                    <StoreDot slot={s.slot} />
                    {s.label}
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>
            {errors.storeId ? <FieldError>{errors.storeId}</FieldError> : null}
          </Field>
          <div className="grid grid-cols-2 gap-3">
            <Field data-invalid={Boolean(errors.date)}>
              <FieldLabel htmlFor="pp-date">{f.date}</FieldLabel>
              <Input
                id="pp-date"
                type="date"
                value={v.date}
                max={todayIstanbul()}
                onChange={(e) => set("date", e.target.value)}
                aria-invalid={Boolean(errors.date)}
              />
              {errors.date ? <FieldError>{errors.date}</FieldError> : null}
            </Field>
            <Field data-invalid={Boolean(errors.price)}>
              <FieldLabel htmlFor="pp-price">{f.price}</FieldLabel>
              <Input
                id="pp-price"
                inputMode="decimal"
                value={v.price}
                onChange={(e) => set("price", e.target.value)}
                className="text-right tabular-nums"
                aria-invalid={Boolean(errors.price)}
                autoFocus
              />
              {errors.price ? <FieldError>{errors.price}</FieldError> : null}
            </Field>
          </div>
          {preview ? (
            <FieldDescription className="-mt-2 text-right tabular-nums">
              {f.unitPreview(preview)}
            </FieldDescription>
          ) : null}
          <Field orientation="horizontal">
            <Checkbox
              id="pp-promo"
              checked={v.isPromo}
              onCheckedChange={(x) => set("isPromo", x === true)}
            />
            <FieldLabel htmlFor="pp-promo">{f.isPromo}</FieldLabel>
          </Field>
          {v.isPromo ? (
            <Field data-invalid={Boolean(errors.promoUntil)}>
              <FieldLabel htmlFor="pp-until">{f.promoUntil}</FieldLabel>
              <Input
                id="pp-until"
                type="date"
                value={v.promoUntil}
                min={v.date}
                onChange={(e) => set("promoUntil", e.target.value)}
                aria-invalid={Boolean(errors.promoUntil)}
              />
              <FieldDescription>{f.promoUntilHint}</FieldDescription>
              {errors.promoUntil ? <FieldError>{errors.promoUntil}</FieldError> : null}
            </Field>
          ) : null}
          <Field>
            <FieldLabel htmlFor="pp-note">{f.note}</FieldLabel>
            <Input id="pp-note" value={v.note} onChange={(e) => set("note", e.target.value)} />
          </Field>
          {errors.root ? <FieldError>{errors.root}</FieldError> : null}
        </FieldGroup>
      </form>
    </ResponsiveDialog>
  );
}