import { useState } from "react";
import { open } from "@tauri-apps/plugin-dialog";
import { useGalleryStore } from "../../store";
import { FakeTile } from "./fakes";

export function StepAddLibrary() {
  const folders = useGalleryStore((s) => s.folders);
  const addFolder = useGalleryStore((s) => s.addFolder);
  const [adding, setAdding] = useState(false);
  const [addError, setAddError] = useState<string | null>(null);

  const handlePick = async () => {
    setAddError(null);
    const selected = await open({ directory: true, multiple: false, title: "Select Media Folder" });
    if (typeof selected !== "string") return;
    setAdding(true);
    try {
      await addFolder(selected);
    } catch (error) {
      setAddError(error instanceof Error ? error.message : String(error));
    } finally {
      setAdding(false);
    }
  };

  return (
    <div>
      <p className="text-sm leading-relaxed text-gray-300">
        A library is just a folder on disk — Phokus watches it and keeps itself in sync as files are
        added, renamed, or removed. Nothing is moved or copied.
      </p>

      <div className="mt-5 flex items-center justify-between gap-6 border-y border-white/[0.05] py-4 light-theme:border-gray-300/70">
        <div className="min-w-0">
          {folders.length > 0 ? (
            <>
              <p className="text-sm text-white">
                {folders.length === 1 ? `“${folders[0].name}” added` : `${folders.length} folders in your library`}
              </p>
              <p className="mt-1 text-xs text-gray-500">
                Indexing runs in the background — you can add more folders from the sidebar any time.
              </p>
            </>
          ) : (
            <>
              <p className="text-sm text-white">Add your first folder</p>
              <p className="mt-1 text-xs text-gray-500">
                Pick somewhere with photos or videos. You can add more later from the sidebar.
              </p>
            </>
          )}
          {addError ? <p className="mt-1.5 text-xs text-amber-300/90 light-theme:text-amber-700">{addError}</p> : null}
        </div>
        <button
          className="shrink-0 rounded-md border border-emerald-400/35 bg-emerald-500/15 px-3 py-1.5 text-xs text-emerald-200 transition-colors hover:bg-emerald-500/25 disabled:cursor-not-allowed disabled:opacity-45 light-theme:border-emerald-600/50 light-theme:bg-emerald-100 light-theme:text-emerald-700 light-theme:hover:bg-emerald-200"
          onClick={() => void handlePick()}
          disabled={adding}
        >
          {adding ? "Adding..." : folders.length > 0 ? "Add another folder" : "Choose a folder"}
        </button>
      </div>

      <p className="mt-5 text-xs leading-relaxed text-gray-500">
        As indexing runs, the gallery fills in roughly like this — tiles appear immediately and sharpen
        as thumbnails are generated:
      </p>
      <div className="media-dark-surface mt-3 grid grid-cols-6 gap-1.5">
        <FakeTile index={0} />
        <FakeTile index={1} favorite />
        <FakeTile index={2} duration="0:42" />
        <FakeTile index={3} rating={4} />
        <FakeTile index={4} loaded={false} />
        <FakeTile index={5} loaded={false} />
      </div>
    </div>
  );
}