import { type ReactNode } from "react";
import { useTranslation } from "react-i18next";
import { RotateCcw } from "lucide-react";
import { IconButton } from "./ui/IconButton";
import { Slider as Range, CheckRow } from "./ui/NativeControls";
import { formatDecimal, formatUnit } from "../lib/format";

// --- settings-panel building blocks ------------------------------------------------------------
export function PanelHead({ children }: { children: ReactNode }) {
  return (
    <div className="px-1 pt-2 pb-1 text-2xs uppercase tracking-wide text-white/50">{children}</div>
  );
}
export function Slider({
  label,
  value,
  min,
  max,
  step,
  suffix,
  seconds,
  onChange,
  onReset,
}: {
  label: string;
  value: number;
  min: number;
  max: number;
  step: number;
  /** A symbol after the number ("%", "px"). */
  suffix?: string;
  /** The value is seconds: named in the UI language's unit ("0.5 sec" / "0,5 mp"). */
  seconds?: boolean;
  onChange: (v: number) => void;
  onReset?: () => void;
}) {
  const { t, i18n } = useTranslation();
  const lang = i18n.language;
  const shown = seconds
    ? formatUnit(value, "second", lang)
    : `${formatDecimal(value, lang, 1, 0)}${suffix ?? ""}`;
  return (
    <div className="px-1 py-1">
      <div className="mb-1 flex items-center justify-between text-[0.75rem] text-white/80">
        <span>{label}</span>
        <span className="flex items-center gap-1.5">
          <span className="tabular-nums text-white/60">{shown}</span>
          {onReset && (
            <IconButton
              variant="overlay"
              onClick={onReset}
              label={t("common.resetNamed", { name: label })}
              className="-my-1.5"
            >
              <RotateCcw className="size-3.5!" />
            </IconButton>
          )}
        </span>
      </div>
      <Range
        min={min}
        max={max}
        step={step}
        value={value}
        aria-label={label}
        onChange={(v) => onChange(v)}
      />
    </div>
  );
}
export function Toggle({
  label,
  checked,
  onChange,
}: {
  label: string;
  checked: boolean;
  onChange: (v: boolean) => void;
}) {
  // The whole row toggles and grows to 44 on touch (CheckRow); the box sits at the row's end.
  return (
    <CheckRow
      checked={checked}
      onChange={onChange}
      className="w-full flex-row-reverse justify-between px-1 py-1.5 text-[0.75rem] text-white/80"
    >
      {label}
    </CheckRow>
  );
}

// A control button with a tooltip that opens ABOVE it (so it never clips off the bottom of the
// viewport, unlike a native title tooltip on the bottom control bar).
export function Ctrl({
  label,
  onClick,
  disabled,
  align = "center",
  children,
}: {
  label: string;
  onClick: () => void;
  disabled?: boolean;
  // Tooltip horizontal anchor: "start"/"end" for edge buttons so it doesn't clip off the viewport.
  align?: "start" | "center" | "end";
  children: ReactNode;
}) {
  const pos =
    align === "start" ? "left-0" : align === "end" ? "right-0" : "left-1/2 -translate-x-1/2";
  // `will-change-[opacity]` keeps each tooltip on its own compositor layer from the start. Without it
  // the browser promotes a tooltip only while its fade runs, and inside the player's scale(1.25)
  // the neighbouring glyphs got re-layered with it: every button in the row shimmered as the
  // pointer crossed one (seen by the owner).
  return (
    <div className="relative flex group/ctrl">
      <IconButton
        variant="overlay"
        size="player"
        round
        noTitle
        onClick={onClick}
        disabled={disabled}
        label={label}
      >
        {children}
      </IconButton>
      <span
        className={`pointer-events-none absolute bottom-full ${pos} mb-2 whitespace-nowrap rounded-sm bg-black/90 px-2 py-1 text-2xs text-white opacity-0 will-change-[opacity] transition group-hover/ctrl:opacity-100`}
      >
        {label}
      </span>
    </div>
  );
}