"use client"

import { TriangleAlert, Satellite } from "lucide-react"
import { cn } from "@/lib/utils"

/**
 * TargetDistance — ren visningskomponent for gjenstående avstand til grønn.
 *
 * "Dum" med vilje: den mottar ferdigregnede tall som props. Ingen GPS,
 * ingen fetch, ingen kart. Følger TeeCups clubhouse-palett (grønn/oransje
 * aksenter, samme korthjørner/skygge-stil som resten av scorekortet).
 */
export type TargetDistanceProps = {
  distances: {
    front: number // meter
    middle: number
    back: number
  } | null // null = ingen koordinatdata for dette hullet (normal, forventet tilstand)
  nearestHazard?: {
    label: string // f.eks. "Bunker (front)"
    distanceMeters: number
  } | null
  isLive: boolean // true = tallene oppdateres kontinuerlig fra GPS akkurat nå
  /** "compact" = badge ved siden av GIR-merket, "full" = eget panel. */
  size?: "compact" | "full"
  className?: string
}

/** Liten "oppdateres live"-indikator: pulserende prikk + tekst (aldri kun farge). */
function LiveStatus({ isLive, compact }: { isLive: boolean; compact?: boolean }) {
  return (
    <span
      className={cn(
        "inline-flex items-center gap-1.5 font-medium text-clubhouse-muted",
        compact ? "text-[11px]" : "text-xs",
      )}
    >
      {isLive ? (
        <>
          <span aria-hidden="true" className="relative flex size-2">
            <span className="absolute inline-flex size-full animate-ping rounded-full bg-tee-strong opacity-70" />
            <span className="relative inline-flex size-2 rounded-full bg-tee-strong" />
          </span>
          {compact ? "Live" : "Oppdateres live"}
        </>
      ) : (
        <>
          <Satellite aria-hidden="true" className="size-3.5" />
          {compact ? "Sist målt" : "Ikke live — sist målte posisjon"}
        </>
      )}
    </span>
  )
}

/** Hindring-linje: kun synlig når det finnes en relevant hindring. Oransje varsel, ikke rødt. */
function HazardLine({
  hazard,
  compact,
}: {
  hazard: { label: string; distanceMeters: number }
  compact?: boolean
}) {
  return (
    <p
      className={cn(
        "inline-flex items-center gap-1.5 font-medium text-cup-strong",
        compact ? "text-[11px]" : "text-sm",
      )}
    >
      <TriangleAlert aria-hidden="true" className={compact ? "size-3.5 shrink-0" : "size-4 shrink-0"} />
      <span className="text-pretty">
        {hazard.label}: <span className="tabular-nums font-bold">{hazard.distanceMeters}</span> m
      </span>
    </p>
  )
}

/** En avstandskolonne (Front/Midt/Bak). Alltid tekst-label + tall + enhet. */
function DistanceColumn({
  label,
  value,
  emphasized,
  compact,
}: {
  label: string
  value: number
  emphasized?: boolean
  compact?: boolean
}) {
  return (
    <div className="flex flex-col items-center justify-end gap-0.5">
      <span
        className={cn(
          "font-semibold uppercase tracking-wide text-clubhouse-muted",
          compact ? "text-[10px]" : "text-xs",
        )}
      >
        {label}
      </span>
      <span
        className={cn(
          "flex items-baseline gap-0.5 leading-none tabular-nums",
          emphasized ? "text-tee-strong" : "text-clubhouse-ink",
          // Stort nok til å leses på avstand, i sollys — som en klokke-visning.
          compact
            ? emphasized
              ? "text-3xl font-black"
              : "text-xl font-bold"
            : emphasized
              ? "text-6xl font-black"
              : "text-4xl font-bold",
        )}
      >
        {value}
        <span
          className={cn(
            "font-semibold text-clubhouse-muted",
            compact ? "text-[10px]" : "text-sm",
          )}
        >
          m
        </span>
      </span>
    </div>
  )
}

/** Nøytral, lavmælt placeholder når banen ikke har koordinatdata. Aldri en feilmelding. */
function NoData({ compact, className }: { compact?: boolean; className?: string }) {
  return (
    <div
      role="note"
      className={cn(
        "inline-flex items-center gap-2 rounded-xl border border-clubhouse-border bg-clubhouse-field text-clubhouse-muted",
        compact ? "px-2.5 py-1.5 text-[11px]" : "px-4 py-3 text-sm",
        className,
      )}
    >
      <Satellite aria-hidden="true" className={compact ? "size-3.5" : "size-4"} />
      <span>Avstand ikke tilgjengelig</span>
    </div>
  )
}

export function TargetDistance({
  distances,
  nearestHazard,
  isLive,
  size = "full",
  className,
}: TargetDistanceProps) {
  const compact = size === "compact"

  // Punkt 4: ingen data er en normal, forventet tilstand — vis en nøytral placeholder.
  if (!distances) {
    return <NoData compact={compact} className={className} />
  }

  if (compact) {
    return (
      <div
        className={cn(
          "inline-flex flex-col gap-1 rounded-xl border border-clubhouse-border bg-clubhouse-card px-3 py-2 shadow-sm",
          className,
        )}
      >
        <div className="flex items-end gap-3">
          <DistanceColumn label="Front" value={distances.front} compact />
          <DistanceColumn label="Midt" value={distances.middle} emphasized compact />
          <DistanceColumn label="Bak" value={distances.back} compact />
        </div>
        <div className="flex items-center justify-between gap-2">
          <LiveStatus isLive={isLive} compact />
          {nearestHazard ? <HazardLine hazard={nearestHazard} compact /> : null}
        </div>
      </div>
    )
  }

  return (
    <section
      aria-label="Avstand til grønn"
      className={cn(
        "flex w-full flex-col gap-3 rounded-2xl border border-clubhouse-border bg-clubhouse-card p-5 shadow-sm",
        className,
      )}
    >
      <div className="flex items-center justify-between gap-2">
        <h3 className="text-sm font-semibold uppercase tracking-wide text-clubhouse-muted">Til grønn</h3>
        <LiveStatus isLive={isLive} />
      </div>

      <div className="flex items-end justify-between gap-2">
        <DistanceColumn label="Front" value={distances.front} />
        <DistanceColumn label="Midt" value={distances.middle} emphasized />
        <DistanceColumn label="Bak" value={distances.back} />
      </div>

      {nearestHazard ? (
        <div className="border-t border-clubhouse-border pt-3">
          <HazardLine hazard={nearestHazard} />
        </div>
      ) : null}
    </section>
  )
}