"use client";

import { useEffect, useState } from "react";
import type { PokerActionKind, PokerLegalActions } from "@/lib/minigames/poker";
import { pokerAction, type PokerSnapshot } from "@/app/(frontend)/minigames/poker/actions";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Input } from "@/components/ui/input";

interface BettingControlsProps {
  readonly tableId: string;
  readonly snapshotVersion: number;
  readonly legalActions: PokerLegalActions;
  readonly potTotal: number;
  readonly yourTurn: boolean;
  readonly onSnapshot: (snapshot: PokerSnapshot) => void;
}

function clampAmount(value: number, min: number, max: number): number {
  if (!Number.isFinite(value)) return min;
  return Math.min(max, Math.max(min, Math.round(value)));
}

function amountLabel(value: number): string {
  return value.toLocaleString();
}

export function BettingControls({
  tableId,
  snapshotVersion,
  legalActions,
  potTotal,
  yourTurn,
  onSnapshot,
}: BettingControlsProps) {
  const [pendingAction, setPendingAction] = useState<PokerActionKind | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [amount, setAmount] = useState(legalActions.minBetTo);

  const wagerKind: PokerActionKind | null = legalActions.canBet
    ? "bet"
    : legalActions.canRaise
      ? "raise"
      : null;
  const wagerMin = legalActions.canBet ? legalActions.minBetTo : legalActions.minRaiseTo;
  const wagerMax = legalActions.canBet ? legalActions.maxBetTo : legalActions.maxRaiseTo;
  const canAct = yourTurn && pendingAction === null;

  useEffect(() => {
    setAmount((current) => clampAmount(current, wagerMin, wagerMax));
  }, [wagerMax, wagerMin]);

  useEffect(() => {
    setPendingAction(null);
    setError(null);
  }, [snapshotVersion]);

  const submit = async (kind: PokerActionKind, wager?: number) => {
    setError(null);
    setPendingAction(kind);
    try {
      const result = await pokerAction(tableId, kind, wager);
      if (!result.success) {
        setError(result.error ?? "That action was rejected by the table.");
        setPendingAction(null);
        return;
      }
      if (result.data) onSnapshot(result.data);
    } catch (caught) {
      setError(caught instanceof Error ? caught.message : "Could not send the table action.");
      setPendingAction(null);
    }
  };

  const chooseQuickAmount = (choice: "min" | "half" | "pot" | "all") => {
    const nextAmount =
      choice === "min"
        ? wagerMin
        : choice === "half"
          ? Math.round(potTotal / 2)
          : choice === "pot"
            ? potTotal
            : wagerMax;
    setAmount(clampAmount(nextAmount, wagerMin, wagerMax));
  };

  return (
    <div className="flex flex-col gap-3">
      <div className="flex flex-wrap gap-2">
        <Button
          type="button"
          variant="destructive"
          disabled={!canAct || !legalActions.canFold}
          onClick={() => void submit("fold")}
        >
          Fold
        </Button>
        <Button
          type="button"
          variant="outline"
          disabled={!canAct || !legalActions.canCheck}
          onClick={() => void submit("check")}
        >
          Check
        </Button>
        <Button
          type="button"
          variant="secondary"
          disabled={!canAct || !legalActions.canCall}
          onClick={() => void submit("call")}
        >
          Call {amountLabel(legalActions.callAmount)}
        </Button>
      </div>

      {wagerKind && wagerMax >= wagerMin && (
        <Card className="rounded-none">
          <CardHeader className="p-4 pb-2">
            <CardTitle className="text-sm">
              {wagerKind === "bet" ? "Bet size" : "Raise to"}
            </CardTitle>
          </CardHeader>
          <CardContent className="flex flex-col gap-3 p-4 pt-0">
            <div className="flex items-center gap-3">
              <input
                type="range"
                min={wagerMin}
                max={wagerMax}
                step={1}
                value={amount}
                onChange={(event) =>
                  setAmount(clampAmount(Number(event.target.value), wagerMin, wagerMax))
                }
                disabled={!canAct}
                className="h-2 min-w-0 flex-1 cursor-pointer accent-primary disabled:cursor-not-allowed"
                aria-label={`${wagerKind === "bet" ? "Bet" : "Raise"} amount`}
              />
              <Input
                type="number"
                min={wagerMin}
                max={wagerMax}
                step={1}
                value={amount}
                onChange={(event) =>
                  setAmount(clampAmount(Number(event.target.value), wagerMin, wagerMax))
                }
                disabled={!canAct}
                className="w-24 font-mono tabular-nums"
                aria-label="Wager amount"
              />
            </div>
            <div className="flex flex-wrap gap-2">
              {(["min", "half", "pot", "all"] as const).map((choice) => (
                <Button
                  key={choice}
                  type="button"
                  variant="outline"
                  size="sm"
                  disabled={!canAct}
                  onClick={() => chooseQuickAmount(choice)}
                >
                  {choice === "min"
                    ? "Min"
                    : choice === "half"
                      ? "1/2 pot"
                      : choice === "pot"
                        ? "Pot"
                        : "All-in"}
                </Button>
              ))}
              <Button
                type="button"
                className="ml-auto"
                disabled={!canAct}
                onClick={() => void submit(wagerKind, amount)}
              >
                {wagerKind === "bet" ? "Bet" : "Raise"} {amountLabel(amount)}
              </Button>
            </div>
          </CardContent>
        </Card>
      )}

      <div className="flex min-h-5 items-center justify-between gap-3 text-xs" aria-live="polite">
        {!yourTurn && <span className="text-muted-foreground">Waiting for the table to act.</span>}
        {pendingAction && (
          <span className="text-muted-foreground">Waiting for the table update...</span>
        )}
        {error && <span className="text-destructive">{error}</span>}
      </div>
    </div>
  );
}