import { ChevronRight, ReceiptText } from 'lucide-react';
import {
  type FocusEvent,
  type MouseEvent,
  useCallback,
  useEffect,
  useRef,
  useState,
} from 'react';

import type { ProfileMudPointBalance } from '../contracts/runtime';
import MUD_POINT_ICON_SRC from '../icons/topbar-wallet.png';
import { formatMudPointCount } from '../utils/format';

export type PlatformMudPointWalletEntryProps = {
  balance: number | null;
  breakdown?: ProfileMudPointBalance | null;
  isLoading?: boolean;
  error?: string | null;
  variant?: 'desktop' | 'mobile' | 'editor';
  className?: string;
  onRequestDetails: () => void;
  onRecharge: () => void;
  onOpenLedger: () => void;
};

function MudPointBalanceRow({
  label,
  points,
  detail,
}: {
  label: string;
  points: number;
  detail?: string | null;
}) {
  return (
    <div className="flex min-h-[3.25rem] items-center justify-between gap-4 border-t border-[var(--platform-subpanel-border)] px-4 py-2.5">
      <div className="min-w-0">
        <div className="text-[13px] font-bold text-[var(--platform-text-strong)]">
          {label}
        </div>
        {detail ? (
          <div className="mt-0.5 truncate text-[11px] text-[var(--platform-text-soft)]">
            {detail}
          </div>
        ) : null}
      </div>
      <div className="shrink-0 text-[15px] font-black tabular-nums text-[var(--platform-text-strong)]">
        {formatMudPointCount(points)}
      </div>
    </div>
  );
}

export function PlatformMudPointWalletEntry({
  balance,
  breakdown,
  isLoading = false,
  variant = 'desktop',
  className,
  onRequestDetails,
  onRecharge,
  onOpenLedger,
}: PlatformMudPointWalletEntryProps) {
  const rootRef = useRef<HTMLDivElement | null>(null);
  const isOpenRef = useRef(false);
  const requestedDetailsKeyForOpenRef = useRef<string | null>(null);
  const closeTimerRef = useRef<number | null>(null);
  const [isOpen, setIsOpen] = useState(false);
  const isCompact = variant === 'mobile';
  const displayedBalance = balance ?? breakdown?.totalPoints ?? null;
  const balanceLabel =
    displayedBalance === null
      ? '--'
      : formatMudPointCount(displayedBalance, true);
  const exactBalanceLabel =
    displayedBalance === null ? '--' : formatMudPointCount(displayedBalance);
  const detailsRequestKey = `balance:${balance ?? breakdown?.totalPoints ?? 'unknown'}`;

  const cancelPendingClose = useCallback(() => {
    if (closeTimerRef.current !== null) {
      window.clearTimeout(closeTimerRef.current);
      closeTimerRef.current = null;
    }
  }, []);

  const closeDetails = useCallback(() => {
    cancelPendingClose();
    isOpenRef.current = false;
    requestedDetailsKeyForOpenRef.current = null;
    setIsOpen(false);
  }, [cancelPendingClose]);

  const requestDetailsIfNeeded = useCallback(() => {
    if (
      isLoading ||
      requestedDetailsKeyForOpenRef.current === detailsRequestKey
    ) {
      return;
    }
    requestedDetailsKeyForOpenRef.current = detailsRequestKey;
    onRequestDetails();
  }, [detailsRequestKey, isLoading, onRequestDetails]);

  const requestAndOpen = useCallback(() => {
    cancelPendingClose();
    if (isOpenRef.current) {
      return;
    }
    isOpenRef.current = true;
    setIsOpen(true);
    requestDetailsIfNeeded();
  }, [cancelPendingClose, requestDetailsIfNeeded]);

  useEffect(() => cancelPendingClose, [cancelPendingClose]);

  useEffect(() => {
    if (isOpen) {
      requestDetailsIfNeeded();
    }
  }, [isOpen, requestDetailsIfNeeded]);

  useEffect(() => {
    if (!isOpen) {
      return;
    }
    const handlePointerDown = (event: PointerEvent) => {
      if (!rootRef.current?.contains(event.target as Node)) {
        closeDetails();
      }
    };
    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') {
        closeDetails();
      }
    };
    document.addEventListener('pointerdown', handlePointerDown);
    document.addEventListener('keydown', handleKeyDown);
    return () => {
      document.removeEventListener('pointerdown', handlePointerDown);
      document.removeEventListener('keydown', handleKeyDown);
    };
  }, [closeDetails, isOpen]);

  const closeAfterFocusLeaves = (event: FocusEvent<HTMLDivElement>) => {
    const nextTarget = event.relatedTarget;
    if (
      !(nextTarget instanceof Node) ||
      !event.currentTarget.contains(nextTarget)
    ) {
      closeDetails();
    }
  };
  const closeAfterPointerLeaves = (event: MouseEvent<HTMLDivElement>) => {
    const nextTarget = event.relatedTarget;
    if (
      nextTarget instanceof Node &&
      event.currentTarget.contains(nextTarget)
    ) {
      return;
    }
    cancelPendingClose();
    closeTimerRef.current = window.setTimeout(() => {
      closeTimerRef.current = null;
      closeDetails();
    }, 120);
  };
  return (
    <div
      ref={rootRef}
      className={`platform-mud-point-wallet-entry relative shrink-0 ${className ?? ''}`}
      onMouseLeave={isCompact ? undefined : closeAfterPointerLeaves}
      onBlurCapture={closeAfterFocusLeaves}
    >
      <div
        className={`flex items-stretch overflow-hidden rounded-full border border-[rgba(214,184,159,0.78)] bg-[rgba(255,250,244,0.9)] text-[#6f3d24] shadow-[0_0.18rem_0.55rem_rgba(112,62,32,0.08)] ${
          isCompact ? 'h-8 text-[11px]' : 'h-9 text-xs'
        }`}
      >
        <button
          type="button"
          className="flex min-w-0 items-center gap-1.5 px-2 font-black outline-none transition-colors hover:bg-white/70 focus-visible:bg-white/80"
          aria-label={`泥点 ${exactBalanceLabel}`}
          aria-expanded={isOpen}
          aria-haspopup="dialog"
          aria-busy={isLoading}
          onMouseEnter={isCompact ? undefined : requestAndOpen}
          onFocus={isCompact ? undefined : requestAndOpen}
          onClick={
            isCompact
              ? () => {
                  if (isOpenRef.current) {
                    closeDetails();
                    return;
                  }
                  requestAndOpen();
                }
              : undefined
          }
        >
          <img
            src={MUD_POINT_ICON_SRC}
            alt=""
            aria-hidden="true"
            draggable={false}
            className={`${isCompact ? 'h-[1.05rem] w-[1.05rem]' : 'h-[1.2rem] w-[1.2rem]'} shrink-0 object-cover mix-blend-multiply`}
          />
          <span className="truncate whitespace-nowrap">
            泥点 {balanceLabel}
          </span>
        </button>
        <span
          className="my-1.5 w-px shrink-0 bg-[rgba(196,153,120,0.62)]"
          aria-hidden="true"
        />
        <button
          type="button"
          className="shrink-0 px-2.5 font-black outline-none transition-colors hover:bg-white/75 focus-visible:bg-white/80"
          onClick={() => {
            closeDetails();
            onRecharge();
          }}
        >
          充值
        </button>
      </div>

      {isOpen ? (
        <div
          role="dialog"
          aria-label="泥点账户详情"
          onMouseEnter={isCompact ? undefined : cancelPendingClose}
          className="absolute right-0 top-[calc(100%+0.5rem)] z-[95] w-[min(19rem,calc(100vw-1rem))] overflow-hidden rounded-[1.12rem] border border-[var(--platform-subpanel-border)] bg-[#fffaf4] text-left shadow-[0_1rem_2.8rem_rgba(76,44,27,0.2)]"
        >
          <div className="flex items-center justify-between gap-3 px-4 py-3">
            <div className="text-[15px] font-black text-[var(--platform-text-strong)]">
              泥点 {exactBalanceLabel}
            </div>
            <button
              type="button"
              className="text-xs font-black text-[var(--platform-accent-strong)] outline-none hover:underline focus-visible:underline"
              onClick={() => {
                closeDetails();
                onRecharge();
              }}
            >
              充值
            </button>
          </div>

          {breakdown ? (
            <>
              <MudPointBalanceRow
                label="不限时泥点"
                points={breakdown.permanentPoints}
                detail="按量充值、兑换码获得"
              />
              <MudPointBalanceRow
                label="每日免费泥点"
                points={breakdown.dailyFreePoints}
                detail={`每天重置为 ${formatMudPointCount(breakdown.dailyFreeResetPoints)} 泥点`}
              />
            </>
          ) : (
            <div className="border-t border-[var(--platform-subpanel-border)] px-4 py-6 text-center text-xs font-semibold text-[var(--platform-text-soft)]">
              {isLoading ? '余额读取中' : '余额明细暂不可用'}
            </div>
          )}

          <button
            type="button"
            className="flex w-full items-center justify-center gap-2 border-t border-[var(--platform-subpanel-border)] px-4 py-3 text-[13px] font-black text-[var(--platform-text-strong)] outline-none transition-colors hover:bg-white/45 focus-visible:bg-white/55"
            onClick={() => {
              closeDetails();
              onOpenLedger();
            }}
          >
            <ReceiptText className="h-3.5 w-3.5" aria-hidden="true" />
            使用详情
            <ChevronRight className="h-3.5 w-3.5" aria-hidden="true" />
          </button>
        </div>
      ) : null}
    </div>
  );
}