"use client"

// Full historikk på ett hull, inkl. grafer (ADR-079, 2026-08-16) -- åpnes
// ved klikk fra HoleHistoryPanel sin kompakte oppsummering (hole-stat-
// inputs.tsx), som selv sitter i "skjermen før" slagvinduet/-arket (se
// round-detail.tsx sin PlayerHoleCards og individual-tournament-detail.tsx
// sin HoleStatsSheet-"Oversikt"-steg). INGEN backend-endring -- samme
// GET .../holes/{n}/history-endepunkt som panelet selv allerede brukte
// (app/hole_history.py), som allerede returnerer alt som trengs her.
//
// Grafene gjenbruker EKSAKT samme mønster/fargelogikk som round-stats.tsx
// sin CategoryBar/DeviationBar (bekreftet med bruker: "grafer" betyr dette
// etablerte stolpe-mønsteret, ikke et nytt graf-bibliotek) -- egne lokale
// kopier her, samme "ikke delt kode på tvers av filer"-mønster som resten
// av dette området (se DESIGN_SYSTEM.md).

import { useEffect, useState } from "react"
import { X } from "lucide-react"
import { cn } from "@/lib/utils"

type HoleHistoryInstance = {
  source: "personal" | "tournament"
  played_at: string | null
  label: string
  score: number
  par: number
  putts: number | null
  tee_shot_result: string | null
  approach_result: string | null
  chip_count: number | null
  bunker_shot_count: number | null
  penalty_strokes: number | null
  first_putt_distance_bucket: string | null
}

type HoleHistory = {
  times_played: number
  times_personal: number
  times_tournament: number
  average_score: number
  average_score_vs_par: number
  gir_percent: number | null
  fairway_hit_percent: number | null
  average_putts: number | null
  best_score: number
  worst_score: number
  instances: HoleHistoryInstance[]
}

// Samme fargeskala/kategori-inndeling som round-stats.tsx (chart-1..6,
// grønn->rød golf-resultat-skala).
const C = {
  eagle: "var(--chart-1)",
  birdie: "var(--chart-2)",
  par: "var(--chart-3)",
  bogey: "var(--chart-4)",
  dobbel: "var(--chart-5)",
  verre: "var(--chart-6)",
}

function signed(n: number): string {
  const sign = n > 0 ? "+" : n < 0 ? "−" : "±"
  return `${sign}${Math.abs(n).toFixed(2).replace(".", ",")}`
}

function pct(n: number): string {
  return `${Math.round(n)} %`
}

export function HoleHistoryDetail({
  url,
  holeNumber,
  onClose,
}: {
  url: string
  holeNumber: number
  onClose: () => void
}) {
  const [history, setHistory] = useState<HoleHistory | null | undefined>(undefined)

  useEffect(() => {
    let cancelled = false
    fetch(url, { credentials: "include" })
      .then((res) => (res.ok ? res.json() : null))
      .then((data) => {
        if (!cancelled) setHistory(data)
      })
      .catch(() => {
        if (!cancelled) setHistory(null)
      })
    return () => {
      cancelled = true
    }
  }, [url])

  const par = history?.instances[0]?.par ?? null

  return (
    <div className="fixed inset-0 z-50 flex flex-col bg-background">
      <header className="flex min-h-14 shrink-0 items-center gap-2 border-b border-border px-3">
        <button
          type="button"
          onClick={onClose}
          aria-label="Lukk"
          className="flex size-11 shrink-0 items-center justify-center rounded-xl text-foreground transition-colors hover:bg-accent"
        >
          <X aria-hidden="true" className="size-5" />
        </button>
        <div className="flex min-w-0 flex-1 flex-col items-center text-center">
          <span className="truncate text-base font-extrabold text-foreground">
            Hull {holeNumber}
            {par !== null ? ` · Par ${par}` : ""}
          </span>
          <span className="truncate text-sm font-semibold text-muted-foreground">Din historikk</span>
        </div>
        <div className="size-11 shrink-0" aria-hidden="true" />
      </header>

      <main className="flex min-h-0 flex-1 flex-col overflow-y-auto p-5 sm:p-6">
        <div className="mx-auto flex w-full max-w-sm flex-col gap-6">
          {history === undefined ? (
            <div className="flex flex-1 items-center justify-center py-16">
              <div
                aria-hidden="true"
                className="size-10 animate-spin rounded-full border-4 border-primary/20 border-t-primary"
              />
            </div>
          ) : history === null || history.times_played === 0 ? (
            <p className="rounded-3xl border border-border bg-card p-6 text-center text-base font-semibold text-muted-foreground">
              Ingen historikk å vise på dette hullet ennå.
            </p>
          ) : (
            <>
              <div className="grid grid-cols-2 gap-3">
                <StatTile label="Ganger spilt" value={String(history.times_played)} />
                <StatTile label="Snitt slag" value={history.average_score.toFixed(1)} />
                <StatTile label="Beste" value={String(history.best_score)} />
                <StatTile label="Dårligste" value={String(history.worst_score)} />
              </div>

              <div className="flex flex-col items-center gap-1 rounded-2xl border border-border bg-muted/40 p-4">
                <span className="text-sm font-bold uppercase tracking-wide text-muted-foreground">
                  Snitt til par
                </span>
                <span className="text-5xl font-extrabold tabular-nums text-brand-orange">
                  {signed(history.average_score_vs_par)}
                </span>
              </div>

              {(history.gir_percent !== null || history.fairway_hit_percent !== null) && (
                <div className="grid grid-cols-2 gap-3">
                  {history.gir_percent !== null && <StatTile label="GIR" value={pct(history.gir_percent)} />}
                  {history.fairway_hit_percent !== null && (
                    <StatTile label="Fairway truffet" value={pct(history.fairway_hit_percent)} />
                  )}
                </div>
              )}

              <ScoreDistribution instances={history.instances} />

              <div className="flex flex-col gap-2">
                <h3 className="text-xs font-bold uppercase tracking-wide text-muted-foreground">Alle gangene</h3>
                <ul className="flex flex-col divide-y divide-border overflow-hidden rounded-2xl border border-border">
                  {history.instances.map((inst, i) => (
                    <li key={i} className="flex items-center justify-between gap-3 bg-card px-4 py-3">
                      <span className="flex min-w-0 flex-col">
                        <span className="truncate text-sm font-semibold text-foreground">{inst.label}</span>
                        <span className="text-xs text-muted-foreground">
                          {inst.played_at ?? "Ukjent dato"} · {inst.source === "personal" ? "Frittstående" : "Turnering"}
                        </span>
                      </span>
                      <span className="shrink-0 text-sm font-extrabold tabular-nums text-foreground">
                        {inst.score} slag
                        {inst.putts !== null ? `, ${inst.putts} putt${inst.putts === 1 ? "" : "er"}` : ""}
                      </span>
                    </li>
                  ))}
                </ul>
              </div>
            </>
          )}
        </div>
      </main>
    </div>
  )
}

function StatTile({ label, value }: { label: string; value: string }) {
  return (
    <div className="flex flex-col items-center gap-1 rounded-2xl border border-border bg-card p-4">
      <span className="text-xs font-bold uppercase tracking-wide text-muted-foreground">{label}</span>
      <span className="text-2xl font-extrabold tabular-nums text-foreground">{value}</span>
    </div>
  )
}

// Samme stolpe-mønster som round-stats.tsx sin CategoryBar -- fargede,
// prosent-bredde rektangler med store tall og etiketter.
function ScoreDistribution({ instances }: { instances: HoleHistoryInstance[] }) {
  const diff = (inst: HoleHistoryInstance) => inst.score - inst.par
  const categories = [
    { label: "Eagle+", test: (d: number) => d <= -2, color: C.eagle },
    { label: "Birdie", test: (d: number) => d === -1, color: C.birdie },
    { label: "Par", test: (d: number) => d === 0, color: C.par },
    { label: "Bogey", test: (d: number) => d === 1, color: C.bogey },
    { label: "Dobbel bogey", test: (d: number) => d === 2, color: C.dobbel },
    { label: "Verre", test: (d: number) => d >= 3, color: C.verre },
  ]
    .map((c) => {
      const count = instances.filter((inst) => c.test(diff(inst))).length
      const percentage = instances.length > 0 ? (count / instances.length) * 100 : 0
      return { ...c, count, percentage }
    })
    .filter((c) => c.count > 0)

  const maxPct = Math.max(...categories.map((c) => c.percentage), 1)

  return (
    <div className="flex flex-col gap-3">
      <h3 className="text-xs font-bold uppercase tracking-wide text-muted-foreground">Score-fordeling</h3>
      {categories.map((c) => {
        const width = maxPct > 0 ? (c.percentage / maxPct) * 100 : 0
        return (
          <div key={c.label} className="flex flex-col gap-1">
            <div className="flex items-baseline justify-between gap-2">
              <span className="text-base font-semibold text-foreground">{c.label}</span>
              <span className="text-sm font-bold tabular-nums text-muted-foreground">
                {pct(c.percentage)} <span className="text-foreground">· {c.count}</span>
              </span>
            </div>
            <div className="h-6 overflow-hidden rounded-lg bg-muted">
              <div
                className={cn("h-full rounded-lg")}
                style={{ width: `${Math.max(width, 6)}%`, backgroundColor: c.color }}
              />
            </div>
          </div>
        )
      })}
    </div>
  )
}