import Link from "next/link";
import { Layers, Plus, ArrowDownAZ, Hash, RectangleVertical, RectangleHorizontal } from "lucide-react";
import { listAllTagCategories, type CategorySort } from "@/lib/db/queries";
import { createTagCategoryAction } from "@/app/actions/tagCategories";
import { CategoryGridCard } from "@/components/categories/CategoryGridCard";
import { cn } from "@/lib/utils";

export const dynamic = "force-dynamic";

type View = "portrait" | "landscape";

export default async function CategoriesPage({
  searchParams,
}: {
  searchParams: Promise<Record<string, string | string[] | undefined>>;
}) {
  const sp = await searchParams;
  const sort: CategorySort = sp.sort === "count" ? "count" : "az";
  const view: View = sp.view === "landscape" ? "landscape" : "portrait";
  const qs = (overrides: Partial<{ sort: CategorySort; view: View }>) => {
    const params = new URLSearchParams();
    const finalSort = overrides.sort ?? sort;
    const finalView = overrides.view ?? view;
    if (finalSort === "count") params.set("sort", "count");
    if (finalView === "landscape") params.set("view", "landscape");
    const s = params.toString();
    return s ? `/category?${s}` : "/category";
  };
  const cats = listAllTagCategories(sort);
  return (
    <div className="max-w-[1600px] mx-auto px-6 py-6 fade-in">
      <div className="flex items-start justify-between gap-6 mb-6">
        <div>
          <h1 className="text-3xl font-semibold tracking-tight">Categories</h1>
          <p className="text-[var(--color-fg-dim)] mt-1 max-w-prose">
            Umbrellas that group related tags. A category like <span className="font-mono text-[var(--color-fg)]">BDSM</span> can collect{" "}
            <span className="font-mono text-[var(--color-fg)]">bondage</span>,{" "}
            <span className="font-mono text-[var(--color-fg)]">shibari</span>,{" "}
            <span className="font-mono text-[var(--color-fg)]">cuffs</span>, etc.
            Each tag belongs to at most one category.
          </p>
          <p className="text-sm text-[var(--color-fg-muted)] mt-1">{cats.length} categor{cats.length === 1 ? "y" : "ies"}</p>
        </div>
        <div className="flex items-center gap-2 shrink-0">
          <div className="flex items-center rounded-lg glass overflow-hidden text-xs">
            <Link
              href={qs({ sort: "az" })}
              className={cn(
                "flex items-center gap-1 px-2.5 py-1.5",
                sort === "az"
                  ? "bg-[var(--color-cyan)] text-black font-medium"
                  : "text-[var(--color-fg-dim)] hover:text-[var(--color-fg)] hover:bg-[var(--color-glass)]",
              )}
              title="Sort A → Z"
            >
              <ArrowDownAZ className="w-3.5 h-3.5" /> A-Z
            </Link>
            <Link
              href={qs({ sort: "count" })}
              className={cn(
                "flex items-center gap-1 px-2.5 py-1.5",
                sort === "count"
                  ? "bg-[var(--color-cyan)] text-black font-medium"
                  : "text-[var(--color-fg-dim)] hover:text-[var(--color-fg)] hover:bg-[var(--color-glass)]",
              )}
              title="Sort by cover count"
            >
              <Hash className="w-3.5 h-3.5" /> Count
            </Link>
          </div>
          <form action={createTagCategoryAction} className="flex items-center gap-2">
            <input
              name="name"
              placeholder="New category"
              required
              maxLength={64}
              className="glass rounded-lg px-3 py-1.5 text-sm outline-none focus:border-[var(--color-cyan)] w-56"
            />
            <button className="flex items-center gap-1 text-sm px-3 py-1.5 rounded-lg bg-[var(--color-cyan)] text-black font-medium">
              <Plus className="w-4 h-4" /> Create
            </button>
          </form>
          <div className="flex items-center rounded-lg glass overflow-hidden text-xs">
            <Link
              href={qs({ view: "portrait" })}
              className={cn(
                "flex items-center gap-1 px-2.5 py-1.5",
                view === "portrait"
                  ? "bg-[var(--color-cyan)] text-black font-medium"
                  : "text-[var(--color-fg-dim)] hover:text-[var(--color-fg)] hover:bg-[var(--color-glass)]",
              )}
              title="Portrait layout"
            >
              <RectangleVertical className="w-3.5 h-3.5" /> P
            </Link>
            <Link
              href={qs({ view: "landscape" })}
              className={cn(
                "flex items-center gap-1 px-2.5 py-1.5",
                view === "landscape"
                  ? "bg-[var(--color-cyan)] text-black font-medium"
                  : "text-[var(--color-fg-dim)] hover:text-[var(--color-fg)] hover:bg-[var(--color-glass)]",
              )}
              title="Landscape layout"
            >
              <RectangleHorizontal className="w-3.5 h-3.5" /> L
            </Link>
          </div>
        </div>
      </div>

      {cats.length === 0 ? (
        <div className="glass rounded-2xl p-card text-center">
          <Layers className="w-8 h-8 mx-auto text-[var(--color-fg-dim)] mb-label" />
          <p className="text-[var(--color-fg-dim)]">No categories yet. Create one above to start grouping tags.</p>
        </div>
      ) : view === "portrait" ? (
        // Target 7 per row at full desktop width; scale down responsively.
        <div key="portrait" className="fade-in grid gap-4 grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6 2xl:grid-cols-7">
          {cats.map((c) => (
            <CategoryGridCard
              key={c.id}
              id={c.id}
              slug={c.slug}
              name={c.name}
              color={c.color}
              description={c.description}
              tagCount={c.tagCount}
              imageCount={c.imageCount}
              view="portrait"
              portrait={{ path: c.coverPortraitPath, zoom: c.coverPortraitZoom, offsetX: c.coverPortraitOffsetX, offsetY: c.coverPortraitOffsetY }}
              landscape={{ path: c.coverLandscapePath, zoom: c.coverLandscapeZoom, offsetX: c.coverLandscapeOffsetX, offsetY: c.coverLandscapeOffsetY }}
            />
          ))}
        </div>
      ) : (
        // Landscape: 3 per row at desktop; 1-2 on smaller screens.
        <div key="landscape" className="fade-in grid gap-4 grid-cols-1 md:grid-cols-2 lg:grid-cols-3">
          {cats.map((c) => (
            <CategoryGridCard
              key={c.id}
              id={c.id}
              slug={c.slug}
              name={c.name}
              color={c.color}
              description={c.description}
              tagCount={c.tagCount}
              imageCount={c.imageCount}
              view="landscape"
              portrait={{ path: c.coverPortraitPath, zoom: c.coverPortraitZoom, offsetX: c.coverPortraitOffsetX, offsetY: c.coverPortraitOffsetY }}
              landscape={{ path: c.coverLandscapePath, zoom: c.coverLandscapeZoom, offsetX: c.coverLandscapeOffsetX, offsetY: c.coverLandscapeOffsetY }}
            />
          ))}
        </div>
      )}
    </div>
  );
}