"use client";

import { ChangeEvent, FormEvent, useCallback, useEffect, useRef, useState } from "react";
import ClothesShell from "@/components/clothes/ClothesShell";
import IconButton, {
  EditIcon,
  TrashIcon,
} from "@/components/ui/IconButton";
import ImageCropper from "@/components/ui/ImageCropper";
import { FormModal } from "@/components/ui/Modal";
import type { Brand } from "@/data/clothes";
import { ApiError, uploadMedia } from "@/lib/api";
import {
  createBrand,
  deleteBrand,
  fetchBrands,
  updateBrand,
} from "@/lib/clothes-api";
import { useConfirm } from "@/components/ui/ConfirmDialog";

type AspectRatio = "1:1" | "3:2";

const DEFAULT_IMAGE = "/images/ola-szkolda-J61EvbE1UCE-unsplash.jpg";

export default function BrandsPage() {
  const confirmDialog = useConfirm();
  const [items, setItems] = useState<Brand[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [saving, setSaving] = useState(false);
  const [modalOpen, setModalOpen] = useState(false);
  const [editingId, setEditingId] = useState<string | null>(null);
  const [nameFa, setNameFa] = useState("");
  const [nameEn, setNameEn] = useState("");
  const [aspect, setAspect] = useState<AspectRatio>("1:1");
  const [imagePreview, setImagePreview] = useState(DEFAULT_IMAGE);
  const [imageFile, setImageFile] = useState<File | null>(null);
  const fileInputRef = useRef<HTMLInputElement>(null);

  const reload = useCallback(async () => {
    setLoading(true);
    setError(null);
    try {
      setItems(await fetchBrands());
    } catch (err) {
      setError(
        err instanceof ApiError ? err.message : "بارگذاری برندها ناموفق بود.",
      );
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    void reload();
  }, [reload]);

  function resetForm() {
    setEditingId(null);
    setNameFa("");
    setNameEn("");
    setAspect("1:1");
    setImagePreview(DEFAULT_IMAGE);
    setImageFile(null);
    if (fileInputRef.current) fileInputRef.current.value = "";
  }

  function closeModal() {
    setModalOpen(false);
    resetForm();
  }

  function openCreate() {
    resetForm();
    setModalOpen(true);
  }

  function openEdit(brand: Brand) {
    setEditingId(brand.id);
    setNameFa(brand.nameFa);
    setNameEn(brand.nameEn);
    setImagePreview(brand.image || DEFAULT_IMAGE);
    setImageFile(null);
    setModalOpen(true);
  }

  function handleImageChange(event: ChangeEvent<HTMLInputElement>) {
    const file = event.target.files?.[0];
    if (!file) return;
    setImageFile(file);
    setImagePreview(URL.createObjectURL(file));
  }

  async function handleSubmit(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    if (!nameFa.trim()) return;
    setSaving(true);
    setError(null);
    try {
      let imageUrl: string | undefined;
      let imageKey: string | undefined;
      if (imageFile) {
        const uploaded = await uploadMedia(imageFile, "brand");
        imageUrl = uploaded.url;
        imageKey = uploaded.storageKey;
      }

      if (editingId) {
        await updateBrand(editingId, {
          nameFa: nameFa.trim(),
          nameEn: nameEn.trim() || undefined,
          ...(imageUrl ? { imageUrl, imageKey } : {}),
        });
      } else {
        await createBrand({
          nameFa: nameFa.trim(),
          nameEn: nameEn.trim() || undefined,
          imageUrl,
          imageKey,
        });
      }
      await reload();
      closeModal();
    } catch (err) {
      setError(
        err instanceof ApiError ? err.message : "ذخیره برند ناموفق بود.",
      );
    } finally {
      setSaving(false);
    }
  }

  async function handleDelete(id: string) {
    if (!(await confirmDialog("این برند حذف شود؟"))) return;
    setError(null);
    try {
      await deleteBrand(id);
      setItems((prev) => prev.filter((item) => item.id !== id));
    } catch (err) {
      setError(
        err instanceof ApiError ? err.message : "حذف برند ناموفق بود.",
      );
    }
  }

  return (
    <>
      <ClothesShell
        eyebrow="Brands"
        title="برندها"
        description="برندهای فروشگاه را با تصویر و نام فارسی/انگلیسی مدیریت کنید."
        breadcrumbs={[
          { label: "داشبورد", href: "/" },
          { label: "لباس‌ها", href: "/clothes" },
          { label: "برندها" },
        ]}
        onPlusClick={openCreate}
        plusLabel="برند جدید"
      >
        {error ? (
          <p className="mb-2 rounded-lg border border-line bg-surface px-4 py-3 text-sm text-ink">
            {error}
          </p>
        ) : null}
        {loading ? (
          <p className="text-sm text-muted">در حال بارگذاری...</p>
        ) : (
          <div className="grid grid-cols-1 gap-2 sm:grid-cols-2">
            {items.length === 0 ? (
              <p className="col-span-full rounded-lg border border-line bg-surface px-4 py-8 text-center text-sm text-muted">
                هنوز برندی ثبت نشده است.
              </p>
            ) : null}
            {items.map((brand, i) => (
              <article
                key={brand.id}
                className="brand-card dash-enter"
                style={{ animationDelay: `${80 + i * 60}ms` }}
              >
                <div className="relative h-16 w-16 shrink-0 overflow-hidden rounded-md bg-[#f3f3f1]">
                  {/* eslint-disable-next-line @next/next/no-img-element */}
                  <img
                    src={brand.image}
                    alt={brand.nameFa}
                    className="h-full w-full object-cover"
                  />
                </div>

                <div className="min-w-0 flex-1">
                  <h2 className="text-base text-ink sm:text-lg">{brand.nameFa}</h2>
                  <p
                    dir="ltr"
                    className="text-end font-display text-[0.7rem] tracking-[0.08em] text-muted sm:text-xs"
                  >
                    {brand.nameEn}
                  </p>
                </div>

                <div className="tree-row-actions shrink-0">
                  <IconButton
                    label="ویرایش"
                    variant="line"
                    onClick={() => openEdit(brand)}
                  >
                    <EditIcon />
                  </IconButton>
                  <IconButton
                    label="حذف"
                    variant="line"
                    onClick={() => void handleDelete(brand.id)}
                  >
                    <TrashIcon />
                  </IconButton>
                </div>
              </article>
            ))}
          </div>
        )}
      </ClothesShell>

      <FormModal
        open={modalOpen}
        title={editingId ? "ویرایش برند" : "برند جدید"}
        onClose={closeModal}
        onSubmit={handleSubmit}
        submitLabel={saving ? "..." : editingId ? "ذخیره" : "افزودن برند"}
        wide
      >
        <div className="clothes-field">
          <span className="text-[0.7rem] text-muted">نسبت برش</span>
          <div className="crop-ratio-radios" role="radiogroup" aria-label="نسبت برش">
            <label className="crop-ratio-option">
              <input
                type="radio"
                name="brand-aspect"
                value="1:1"
                checked={aspect === "1:1"}
                onChange={() => setAspect("1:1")}
              />
              <span>۱:۱</span>
            </label>
            <label className="crop-ratio-option">
              <input
                type="radio"
                name="brand-aspect"
                value="3:2"
                checked={aspect === "3:2"}
                onChange={() => setAspect("3:2")}
              />
              <span>۳:۲</span>
            </label>
          </div>
        </div>

        <div className="clothes-field">
          <span className="text-[0.7rem] text-muted">تصویر برند</span>
          <ImageCropper src={imagePreview} aspect={aspect} alt="پیش‌نمایش برش برند" />
          <input
            ref={fileInputRef}
            type="file"
            accept="image/jpeg,image/png,image/webp"
            className="sr-only"
            onChange={handleImageChange}
          />
          <button
            type="button"
            className="mt-2 w-full border border-line bg-white px-3 py-2 text-sm text-ink transition-colors hover:border-ink"
            onClick={() => fileInputRef.current?.click()}
          >
            انتخاب تصویر
          </button>
        </div>

        <div className="clothes-field">
          <label htmlFor="brand-name-fa">نام فارسی</label>
          <input
            id="brand-name-fa"
            value={nameFa}
            onChange={(e) => setNameFa(e.target.value)}
            placeholder="مثلاً مانا"
            required
          />
        </div>
        <div className="clothes-field">
          <label htmlFor="brand-name-en">نام انگلیسی</label>
          <input
            id="brand-name-en"
            dir="ltr"
            className="!text-end"
            value={nameEn}
            onChange={(e) => setNameEn(e.target.value)}
            placeholder="Mana"
          />
        </div>
      </FormModal>
    </>
  );
}