pangolin/client/lib/widgets/quota_card.dart

// quota_card.dart — 免费版每日额度卡
//
// 三态展示(额度全账户共享):
//   ① 连接中(countdown != null):显示剩余倒计时 mm:ss + 进度条随之收缩。
//   ② 未连接·有余额:显示今日剩余分钟 + 进度条;移动端附「看广告加时」。
//   ③ 未连接·已耗尽:显示「今日已用完」+ 移动端「看广告加时」/ 桌面「升级会员」。
// 状态由 quota_provider(剩余)+ connection_provider(倒计时)注入,本地仅展示。
import 'package:flutter/material.dart';

import '../l10n/app_text.dart';
import '../pangolin_theme.dart';
import '../state/quota_provider.dart';
import 'pangolin_icons.dart';

class QuotaCard extends StatelessWidget {
  const QuotaCard({
    super.key,
    required this.quota,
    required this.t,
    required this.onWatchAd,
    this.countdown,
    this.isDesktop = false,
  });

  final FreeQuotaState quota;
  final AppText t;

  /// 额度耗尽时的加时入口(移动端占位广告 / 桌面升级提示)。
  final VoidCallback onWatchAd;

  /// 连接期剩余倒计时;null = 未连接(展示今日剩余分钟)。
  final Duration? countdown;

  /// 桌面端(Windows/macOS):免费硬 10 分钟不可延,不显示看广告按钮。
  final bool isDesktop;

  static String _mmss(Duration d) {
    final m = d.inMinutes.remainder(60).toString().padLeft(2, '0');
    final s = d.inSeconds.remainder(60).toString().padLeft(2, '0');
    return '$m:$s';
  }

  @override
  Widget build(BuildContext context) {
    final c = context.pangolin;
    final connected = countdown != null;
    final exhausted = quota.isExhausted && !connected;

    // 进度与主值:连接期用倒计时,未连接用剩余分钟。
    final double progress;
    final String label;
    final String value;
    if (connected) {
      final totalSec = quota.totalMinutes * 60;
      progress = totalSec == 0 ? 0 : (countdown!.inSeconds / totalSec).clamp(0.0, 1.0);
      label = t.quotaLeftLabel;
      value = _mmss(countdown!);
    } else {
      progress = quota.progress;
      label = exhausted ? t.quotaUsedUp : t.quotaToday;
      value = exhausted ? '' : '${quota.remainingMinutes} ${t.minutes}';
    }
    final low = connected ? countdown!.inMinutes < 3 : quota.isLow;
    final barColor = exhausted ? c.danger : (low ? c.warning : c.accent);

    return Container(
      padding: const EdgeInsets.fromLTRB(14, 12, 14, 12),
      decoration: BoxDecoration(
        color: c.surface,
        borderRadius: BorderRadius.circular(PangolinRadius.lg),
        border: Border.all(color: c.border),
        boxShadow: PangolinShadow.sm,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Row(children: [
            Icon(PangolinIcons.clock, size: 15, color: exhausted ? c.danger : c.accent),
            const SizedBox(width: 7),
            Flexible(
              child: Text(label,
                  overflow: TextOverflow.ellipsis,
                  style: PangolinText.caption.copyWith(color: c.fg2, fontWeight: FontWeight.w600, fontSize: 12)),
            ),
            if (value.isNotEmpty) ...[
              const SizedBox(width: 7),
              Text(value,
                  style: PangolinText.mono.copyWith(color: c.fg1, fontSize: 14, fontWeight: FontWeight.w600)),
            ],
            const Spacer(),
            Container(
              padding: const EdgeInsets.symmetric(horizontal: 9, vertical: 3),
              decoration: BoxDecoration(color: c.bgSubtle, borderRadius: BorderRadius.circular(PangolinRadius.full)),
              child: Text(t.quotaFree,
                  style: PangolinText.caption.copyWith(color: c.fg3, fontWeight: FontWeight.w600, fontSize: 10.5)),
            ),
          ]),
          const SizedBox(height: 9),
          // 进度条:剩余比例;≤3 分钟 warning、耗尽 danger(满宽轨道 + 比例填充)。
          ClipRRect(
            borderRadius: BorderRadius.circular(3),
            child: SizedBox(
              height: 6,
              child: Stack(children: [
                Positioned.fill(child: ColoredBox(color: c.bgSubtle)),
                FractionallySizedBox(
                  alignment: Alignment.centerLeft,
                  widthFactor: progress,
                  child: AnimatedContainer(
                    duration: PangolinMotion.base,
                    curve: PangolinMotion.easeOut,
                    decoration: BoxDecoration(color: barColor, borderRadius: BorderRadius.circular(3)),
                  ),
                ),
              ]),
            ),
          ),
          // 加时按钮:未连接时显示。移动端「看广告加时」;桌面仅耗尽时给「升级会员」。
          if (!connected && (!isDesktop || exhausted)) ...[
            const SizedBox(height: 11),
            _ActionButton(
              label: isDesktop ? t.upgrade : t.watchAdMore,
              icon: isDesktop ? PangolinIcons.zap : PangolinIcons.playCircle,
              onTap: onWatchAd,
            ),
          ],
        ],
      ),
    );
  }
}

class _ActionButton extends StatelessWidget {
  const _ActionButton({required this.label, required this.icon, required this.onTap});
  final String label;
  final IconData icon;
  final VoidCallback onTap;

  @override
  Widget build(BuildContext context) {
    final c = context.pangolin;
    return Material(
      color: c.accentSubtle,
      shape: StadiumBorder(side: BorderSide(color: c.accentBorder, width: 1.5)),
      clipBehavior: Clip.antiAlias,
      child: InkWell(
        onTap: onTap,
        child: SizedBox(
          height: 38,
          child: Center(
            child: Row(mainAxisSize: MainAxisSize.min, children: [
              Icon(icon, size: 16, color: c.accent),
              const SizedBox(width: 7),
              Text(label,
                  style: PangolinText.sm.copyWith(color: c.accent, fontWeight: FontWeight.w700, fontSize: 13)),
            ]),
          ),
        ),
      ),
    );
  }
}