"use client";

import { Images, Loader2 } from "lucide-react";
import { useEffect, useState } from "react";
import Modal from "@/components/Modal";
import { apiAdminMediaLibrary, apiMyMedia } from "@/lib/api";
import { normalizeBrandURL, type BrandSlot } from "@/lib/brand";
import { isOwnImage, variantURL, widthSrcSet } from "@/lib/responsiveImage";

const SLOT_LABEL: Record<BrandSlot, string> = {
  logo_light: "浅色 Logo",
  logo_dark: "暗色 Logo",
  favicon: "Favicon",
};

/** 选图条目：本人附件带 attachmentId；品牌目录历史图仅 URL（已在品牌目录，无需复制） */
export type BrandPickItem = {
  key: string;
  url: string;
  attachmentId: number | null;
};

export default function BrandMediaPicker({
  open,
  slot,
  onClose,
  onPick,
}: {
  open: boolean;
  slot: BrandSlot;
  onClose: () => void;
  onPick: (item: BrandPickItem) => void;
}) {
  const [items, setItems] = useState<BrandPickItem[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState("");

  useEffect(() => {
    if (!open) return;
    let cancelled = false;
    setLoading(true);
    setError("");
    // 本人附件 + 媒体库盘点里的品牌目录历史图（品牌图不落附件，需合并展示）
    Promise.all([apiMyMedia(), apiAdminMediaLibrary().catch(() => null)])
      .then(([mediaRes, libRes]) => {
        if (cancelled) return;
        if (mediaRes.error) {
          setError(mediaRes.error);
          setItems([]);
          return;
        }
        const out: BrandPickItem[] = (mediaRes.attachments || []).map((a) => ({
          key: `att-${a.id}`,
          url: a.url,
          attachmentId: a.id,
        }));
        const seen = new Set(out.map((i) => i.url));
        for (const it of libRes?.items || []) {
          if (it.category !== "brand") continue;
          if (!normalizeBrandURL(slot, it.url)) continue;
          if (seen.has(it.url)) continue;
          seen.add(it.url);
          out.unshift({ key: `brand-${it.url}`, url: it.url, attachmentId: null });
        }
        setItems(out);
      })
      .catch(() => {
        if (!cancelled) setError("加载媒体库失败");
      })
      .finally(() => {
        if (!cancelled) setLoading(false);
      });
    return () => {
      cancelled = true;
    };
  }, [open, slot]);

  return (
    <Modal
      open={open}
      title={`从媒体库选择 · ${SLOT_LABEL[slot]}`}
      description="位图选中后进入裁剪并转成 WebP；SVG / ICO 与历史品牌图直接引用，之后删除原图不会影响 Logo。"
      onClose={onClose}
      maxWidthClass="max-w-lg"
      dismissOnOverlay
    >
      {loading ? (
        <p className="meta text-[13px] flex items-center gap-2 py-6 justify-center">
          <Loader2 size={14} className="animate-spin" /> 加载中
        </p>
      ) : error ? (
        <p className="text-[13px] py-4" style={{ color: "var(--danger, #b42318)" }}>
          {error}
        </p>
      ) : items.length === 0 ? (
        <p className="meta text-[13px] py-6 text-center">媒体库还没有图片，先上传一张吧。</p>
      ) : (
        <div className="grid grid-cols-4 sm:grid-cols-5 gap-2">
          {items.map((item) => (
            <button
              key={item.key}
              type="button"
              onClick={() => {
                onPick(item);
                onClose();
              }}
              className="relative group aspect-square rounded-xl overflow-hidden"
              style={{ boxShadow: "0 0 0 1px var(--line)", background: "var(--panel-2)" }}
              data-tip="用作草稿预览，点保存后才生效"
            >
              {/* eslint-disable-next-line @next/next/no-img-element */}
              <img
                src={isOwnImage(item.url) ? variantURL(item.url, 160) : item.url}
                srcSet={isOwnImage(item.url) ? widthSrcSet(item.url, [96, 160, 256, 384]) : undefined}
                sizes="(max-width:520px) 23vw, 96px"
                alt={`${SLOT_LABEL[slot]}候选图`}
                className="w-full h-full object-contain"
                loading="lazy"
              />
              <span
                className="pointer-events-none absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100"
                style={{ background: "color-mix(in srgb, var(--ink) 40%, transparent)", color: "#fff" }}
              >
                <Images size={14} />
              </span>
            </button>
          ))}
        </div>
      )}
    </Modal>
  );
}