import { tv, type VariantProps } from "tailwind-variants";
import { TONES, type Tone } from "./tone";

/**
 * What a measurement means (ADR 0026): ink by default — a measurement is not
 * an action, so it does not spend the Brand red (DESIGN.md) — or the Feedback
 * Role a threshold reading carries. Shared with Progress and RadialProgress.
 */
export const MEASURE_TONE_FILL = {
  neutral: "bg-foreground",
  info: "bg-feedback-info-foreground",
  success: "bg-feedback-success-foreground",
  warning: "bg-feedback-warning-foreground",
  danger: "bg-feedback-danger-foreground",
} as const satisfies Record<Tone, string>;

export const meter = tv({
  slots: {
    root: "flex w-full flex-col gap-[var(--reddb-spatial-gap-sm)] text-foreground",
    summary: "flex items-baseline justify-between gap-[var(--reddb-spatial-gap-md)]",
    label: "text-sm font-medium",
    value: "text-sm tabular-nums text-ink-muted",
    track: "h-2 w-full overflow-hidden rounded-full bg-muted",
    indicator: "h-full rounded-full transition-[width] motion-reduce:transition-none",
  },
  variants: {
    layout: {
      stacked: {},
      inline: {
        root: "flex-row items-center gap-[var(--reddb-spatial-gap-md)]",
        summary: "order-last shrink-0",
        value: "min-w-[5ch] text-end",
        track: "min-w-0 flex-1",
      },
    },
    labelHidden: { true: { label: "sr-only" } },
    tone: {
      neutral: { indicator: MEASURE_TONE_FILL.neutral },
      info: { indicator: MEASURE_TONE_FILL.info },
      success: { indicator: MEASURE_TONE_FILL.success },
      warning: { indicator: MEASURE_TONE_FILL.warning },
      danger: { indicator: MEASURE_TONE_FILL.danger },
      /** @deprecated The accent is an emphasis, not a tone (ADR 0026); kept one release. */
      primary: { indicator: "bg-primary" },
    },
  },
  defaultVariants: { tone: "neutral", layout: "stacked", labelHidden: false },
});

export type MeterVariants = VariantProps<typeof meter>;
export type MeterTone = Tone;
/** The tones a Meter accepts: the shared vocabulary (ADR 0026). */
export const METER_TONES = TONES satisfies readonly MeterTone[];
/** @deprecated `primary` is an emphasis, not a tone (ADR 0026). Removed next release. */
export type DeprecatedMeterTone = "primary";