import { useEffect, useState } from "react";
import type { Asset } from "@core/asset";
import type { AppStore } from "@editor/store";
import { analyzeMask, runMaskOperation, type MaskAnalysis, type MaskRasterOperation } from "@operations/masks/rasterActions";

export function MaskStatus({ asset }: { asset: Asset }) {
  const [analysis, setAnalysis] = useState<MaskAnalysis>();

  useEffect(() => {
    let cancelled = false;
    void analyzeMask(asset)
      .then((nextAnalysis) => {
        if (!cancelled) setAnalysis(nextAnalysis);
      })
      .catch(() => {
        if (!cancelled) setAnalysis(undefined);
      });
    return () => {
      cancelled = true;
    };
  }, [asset.source, asset.intrinsicSize.w, asset.intrinsicSize.h]);

  if (!analysis) return <span className="rounded-full bg-white/5 px-3 py-1 text-xs text-sky-100/45">Reading</span>;
  return (
    <span className="inline-flex min-w-0 items-center gap-2 rounded-full bg-white/5 px-2 py-1 text-xs text-sky-100/65">
      <img src={analysis.thumbnail} alt="" className="h-7 w-10 rounded-md bg-black/30 object-cover ring-1 ring-white/10" />
      <span className="whitespace-nowrap">Reveal {formatPercent(analysis.coverage)}</span>
      <span className="whitespace-nowrap text-sky-100/45">Inpaint {formatPercent(analysis.hiddenCoverage)}</span>
    </span>
  );
}

export function MaskOperationButtons({ maskLayerId, maskAsset, dispatch }: { maskLayerId: string; maskAsset: Asset; dispatch: AppStore["dispatch"] }) {
  return (
    <>
      <MaskOperationButton label="Invert" title="Invert mask" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "invert" }} dispatch={dispatch} />
      <MaskOperationButton label="White" title="Fill mask white" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "fill", fill: "white" }} dispatch={dispatch} />
      <MaskOperationButton label="Black" title="Fill mask black" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "fill", fill: "black" }} dispatch={dispatch} />
      <MaskOperationButton label="Clear" title="Clear mask" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "fill", fill: "clear" }} dispatch={dispatch} />
      <MaskOperationButton label="Feather" title="Feather mask edge" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "feather", radius: 3 }} dispatch={dispatch} />
      <MaskOperationButton label="Expand" title="Expand mask" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "expand", radius: 3 }} dispatch={dispatch} />
      <MaskOperationButton label="Contract" title="Contract mask" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "contract", radius: 3 }} dispatch={dispatch} />
      <MaskOperationButton label="Blur" title="Blur mask edge" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "blur", radius: 2 }} dispatch={dispatch} />
      <MaskOperationButton label="Clean" title="Despeckle mask" maskLayerId={maskLayerId} maskAsset={maskAsset} operation={{ type: "despeckle", strength: 8 }} dispatch={dispatch} />
    </>
  );
}

function MaskOperationButton({
  label,
  title,
  maskLayerId,
  maskAsset,
  operation,
  dispatch,
}: {
  label: string;
  title: string;
  maskLayerId: string;
  maskAsset: Asset;
  operation: MaskRasterOperation;
  dispatch: AppStore["dispatch"];
}) {
  const [busy, setBusy] = useState(false);
  return (
    <button
      type="button"
      className={maskActionButtonClass()}
      disabled={busy}
      title={title}
      onClick={() => {
        setBusy(true);
        void runMaskOperation(maskLayerId, maskAsset, operation, dispatch)
          .finally(() => setBusy(false));
      }}
    >
      {busy ? "..." : label}
    </button>
  );
}


function maskActionButtonClass() { return "rounded-full bg-white/5 px-2.5 py-1 text-[0.7rem] font-semibold text-white/60 transition hover:bg-white/10 hover:text-white disabled:pointer-events-none disabled:opacity-35"; }
function formatPercent(value: number) { return `${Math.round(value * 100)}%`; }