import { Minus, CornersOut, Hand, Plus } from "@phosphor-icons/react";
import { commandIds } from "@commands/ids";
import type { AppStore } from "@editor/store";
import type { ViewportState } from "@editor/state";

export type BottomControlsAction = "pan" | "zoom";

export type BottomControlsIslandProps = {
  viewport: ViewportState;
  visible: boolean;
  action: BottomControlsAction;
  dispatch: AppStore["dispatch"];
};

export function BottomControlsIsland({ viewport, visible, action, dispatch }: BottomControlsIslandProps) {
  const zoomPercent = Math.round(viewport.zoom * 100);
  const x = Math.round(viewport.center.x);
  const y = Math.round(viewport.center.y);

  return (
    <div
      aria-hidden={!visible}
      className={`flex h-10 min-w-48 items-center justify-center gap-2 rounded-full border border-white/10 bg-black/70 px-2 py-1 text-xs text-white shadow-xl backdrop-blur transition-all duration-200 ${
        visible ? "pointer-events-auto translate-y-0 opacity-100" : "pointer-events-none translate-y-3 opacity-0"
      }`}
    >
      {action === "pan" ? <PanControls x={x} y={y} /> : <ZoomControls zoom={viewport.zoom} zoomPercent={zoomPercent} dispatch={dispatch} />}
    </div>
  );
}

function PanControls({ x, y }: { x: number; y: number }) {
  return (
    <div className="flex w-full items-center justify-center gap-2 tabular-nums">
      <span className={iconSlotClass()}>
        <Hand size={16} weight="regular" />
      </span>
      <Divider />
      <span className={labelClass()}>X</span>
      <span className={valueClass()}>{x}</span>
      <Divider />
      <span className={labelClass()}>Y</span>
      <span className={valueClass()}>{y}</span>
    </div>
  );
}

function ZoomControls({ zoom, zoomPercent, dispatch }: { zoom: number; zoomPercent: number; dispatch: AppStore["dispatch"] }) {
  return (
    <>
      <button type="button" className={buttonClass()} aria-label="Zoom out" onClick={() => dispatch(commandIds.viewportSetZoom, { zoom: zoom / 1.2 })}>
        <Minus size={16} weight="regular" />
      </button>
      <span className="min-w-14 text-center tabular-nums text-white">{zoomPercent}%</span>
      <button type="button" className={buttonClass()} aria-label="Zoom in" onClick={() => dispatch(commandIds.viewportSetZoom, { zoom: zoom * 1.2 })}>
        <Plus size={16} weight="regular" />
      </button>
      <Divider />
      <button type="button" className={buttonClass()} aria-label="Fit artboard" title="Fit artboard" onClick={() => dispatch(commandIds.viewportFitArtboard, undefined)}>
        <CornersOut size={16} weight="regular" />
      </button>
    </>
  );
}

function Divider() {
  return <div className="mx-1 h-4 w-px bg-white/15" />;
}

function labelClass() {
  return "text-white/60";
}

function valueClass() {
  return "min-w-10 text-center text-white";
}

function iconSlotClass() {
  return "grid size-7 place-items-center rounded-full text-white/80";
}

function buttonClass() {
  return `${iconSlotClass()} transition hover:bg-white/10 hover:text-white focus:outline-none focus-visible:outline-none`;
}