"use client";

import { AnimatePresence, motion } from "framer-motion";
import { Bot, Copy, UserPlus, X } from "lucide-react";
import { useEffect, useState } from "react";
import { ScreenHeader, ScreenShell } from "@/components/online/ScreenHeader";
import { useGameStore } from "@/lib/game-store";
import { useOnlineStore } from "@/lib/online-store";
import { useUIStore } from "@/lib/ui-store";
import { useI18n } from "@/lib/i18n";
import { Friend, RoomSeat, avatarEmoji } from "@/lib/online/types";
import { cn } from "@/lib/cn";

export function RoomScreen() {
  const { t } = useI18n();
  const room = useOnlineStore((s) => s.room);
  const friends = useOnlineStore((s) => s.friends);
  const loadFriends = useOnlineStore((s) => s.loadFriends);
  const setPartner = useOnlineStore((s) => s.setPartner);
  const inviteToSeat = useOnlineStore((s) => s.inviteToSeat);
  const addBot = useOnlineStore((s) => s.addBot);
  const clearSeat = useOnlineStore((s) => s.clearSeat);
  const startRoom = useOnlineStore((s) => s.startRoom);
  const leaveRoom = useOnlineStore((s) => s.leaveRoom);
  const newOnlineMatch = useGameStore((s) => s.newOnlineMatch);
  const goGame = useUIStore((s) => s.goGame);
  const go = useUIStore((s) => s.go);

  const [picker, setPicker] = useState<null | { seat: 1 | 2 | 3 }>(null);
  const [copied, setCopied] = useState(false);

  useEffect(() => {
    loadFriends();
  }, [loadFriends]);

  if (!room) return null;
  const seat = (n: number) => room.seats.find((s) => s.seat === n)!;

  const pick = async (friend: Friend) => {
    if (!picker) return;
    if (picker.seat === 2) await setPartner(friend.id);
    else await inviteToSeat(picker.seat, friend.id);
    setPicker(null);
  };

  const copyCode = async () => {
    try {
      await navigator.clipboard.writeText(room.code);
      setCopied(true);
      setTimeout(() => setCopied(false), 1500);
    } catch {
      /* ignore */
    }
  };

  const start = async () => {
    await startRoom();
    const r = useOnlineStore.getState().room!;
    const players = r.seats
      .slice()
      .sort((a, b) => a.seat - b.seat)
      .map((s) => ({
        displayName: s.player!.displayName,
        avatar: s.player!.avatar,
        level: s.player!.level,
      }));
    newOnlineMatch({ players, targetScore: r.targetScore, stake: r.stake, ranked: r.ranked });
    goGame("home");
  };

  const leave = async () => {
    await leaveRoom();
    go("online");
  };

  return (
    <ScreenShell>
      <ScreenHeader
        title={t("room.title")}
        back="online"
        right={
          <button
            onClick={copyCode}
            className="glass rounded-full px-3 py-1.5 text-xs flex items-center gap-1.5 hover:bg-navy-800/80"
          >
            <Copy className="size-3.5 text-gold-400" />
            <span className="tabular-nums tracking-wider">{copied ? t("common.copied") : room.code}</span>
          </button>
        }
      />

      {/* your team */}
      <h3 className="text-xs text-teal-300 font-bold mb-2">{t("team.us")}</h3>
      <div className="grid grid-cols-2 gap-3">
        <SeatCard seat={seat(0)} role="you" onInvite={() => {}} onBot={() => {}} onClear={() => {}} />
        <SeatCard
          seat={seat(2)}
          role="partner"
          onInvite={() => setPicker({ seat: 2 })}
          onBot={() => addBot(2)}
          onClear={() => clearSeat(2)}
        />
      </div>

      {/* opponents */}
      <h3 className="text-xs text-rose-300 font-bold mt-5 mb-2">{t("room.opponents")}</h3>
      <div className="grid grid-cols-2 gap-3">
        <SeatCard
          seat={seat(1)}
          role="opp"
          onInvite={() => setPicker({ seat: 1 })}
          onBot={() => addBot(1)}
          onClear={() => clearSeat(1)}
        />
        <SeatCard
          seat={seat(3)}
          role="opp"
          onInvite={() => setPicker({ seat: 3 })}
          onBot={() => addBot(3)}
          onClear={() => clearSeat(3)}
        />
      </div>

      <div className="flex gap-3 mt-7">
        <button onClick={leave} className="glass rounded-xl px-5 py-3 text-cream/70 hover:text-cream">
          {t("room.leave")}
        </button>
        <button onClick={start} className="btn-gold flex-1 rounded-xl py-3 text-lg">
          {t("room.start")}
        </button>
      </div>

      {/* friend picker */}
      <AnimatePresence>
        {picker && (
          <motion.div
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
            onClick={() => setPicker(null)}
            className="fixed inset-0 z-50 flex items-end sm:items-center justify-center bg-navy-950/80 backdrop-blur-sm p-4"
          >
            <motion.div
              initial={{ y: 40, opacity: 0 }}
              animate={{ y: 0, opacity: 1 }}
              exit={{ y: 40, opacity: 0 }}
              onClick={(e) => e.stopPropagation()}
              className="glass rounded-3xl p-5 w-full max-w-sm max-h-[70vh] overflow-y-auto"
            >
              <h3 className="text-lg font-black gold-text mb-3">{t("room.pickFriend")}</h3>
              <div className="space-y-2">
                {friends.map((f) => (
                  <button
                    key={f.id}
                    onClick={() => pick(f)}
                    className="w-full glass rounded-xl p-2.5 flex items-center gap-3 hover:bg-navy-800/80 transition text-start"
                  >
                    <span className="text-2xl">{avatarEmoji(f.avatar)}</span>
                    <span className="flex-1 text-sm font-semibold text-cream">{f.displayName}</span>
                    <span className="text-[11px] text-cream/45">
                      {t("common.level")} {f.level}
                    </span>
                  </button>
                ))}
              </div>
            </motion.div>
          </motion.div>
        )}
      </AnimatePresence>
    </ScreenShell>
  );
}

function SeatCard({
  seat,
  role,
  onInvite,
  onBot,
  onClear,
}: {
  seat: RoomSeat;
  role: "you" | "partner" | "opp";
  onInvite: () => void;
  onBot: () => void;
  onClear: () => void;
}) {
  const { t } = useI18n();
  const filled = seat.kind !== "empty";
  const label =
    role === "you" ? t("seat.you") : role === "partner" ? t("room.partner") : t("room.opponents");

  return (
    <div
      className={cn(
        "rounded-2xl p-4 min-h-32 flex flex-col items-center justify-center gap-2 border",
        role === "opp" ? "border-rose-500/25 bg-rose-950/20" : "border-teal-500/25 bg-teal-950/20"
      )}
    >
      <span className="text-[10px] text-cream/50">{label}</span>
      {filled ? (
        <>
          <span className="text-3xl">{avatarEmoji(seat.player?.avatar ?? "a-fox")}</span>
          <span className="text-sm font-bold text-cream text-center max-w-full truncate">
            {seat.player?.displayName}
            {seat.kind === "bot" && <span className="text-cream/40"> 🤖</span>}
          </span>
          {seat.kind === "invited" ? (
            <span className="text-[10px] text-gold-300 animate-pulse">{t("room.waiting")}</span>
          ) : (
            role !== "you" && (
              <button
                onClick={onClear}
                aria-label={t("friends.remove")}
                className="grid place-items-center min-h-9 min-w-9 rounded-full text-rose-300/70 hover:text-rose-300 hover:bg-rose-500/10 transition"
              >
                <X className="size-4" />
              </button>
            )
          )}
        </>
      ) : (
        <div className="flex flex-col gap-2 w-full">
          <button
            onClick={onInvite}
            className="rounded-xl bg-navy-900/70 gold-border py-2.5 text-xs text-cream/80 hover:bg-navy-800 active:scale-[0.98] transition flex items-center justify-center gap-1.5"
          >
            <UserPlus className="size-4" />
            {t("room.invite")}
          </button>
          <button
            onClick={onBot}
            className="rounded-xl bg-navy-900/70 gold-border py-2.5 text-xs text-cream/80 hover:bg-navy-800 active:scale-[0.98] transition flex items-center justify-center gap-1.5"
          >
            <Bot className="size-4" />
            {t("room.addBot")}
          </button>
        </div>
      )}
    </div>
  );
}