import 'package:flutter/material.dart';
import 'package:tdesign_flutter/tdesign_flutter.dart';
import '../../core/theme/app_colors_extension.dart';

/// Skeleton 占位卡片，匹配 [ListCard] 布局（基于 TDSkeleton.fromRowCol）：
///
/// 真实 ListCard 结构：
/// ┌────────────────────────────┐
/// │ cardNo ← spaceBetween → amount │  R1: Flexible(14/600) + Text(16/700)
/// │              8px              │
/// │ description                   │  R2: Text(14)
/// │              8px              │
/// │ date ← spaceBetween → tag     │  R3: Flexible(12) + statusTag
/// └────────────────────────────┘
class SkeletonListCard extends StatelessWidget {
  const SkeletonListCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: colors.bgCard,
        borderRadius: BorderRadius.circular(8),
      ),
      child: TDSkeleton.fromRowCol(
        animation: TDSkeletonAnimation.flashed,
        rowCol: TDSkeletonRowCol(
          objects: const [
            // R1: cardNo + amount（spacer 撑开两端）
            [
              TDSkeletonRowColObj.text(width: 120, height: 17, flex: 0),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.text(width: 80, height: 20, flex: 0),
            ],
            // R2: description（全宽）
            [
              TDSkeletonRowColObj.text(height: 17),
            ],
            // R3: date + statusTag（spacer 撑开两端）
            [
              TDSkeletonRowColObj.text(width: 100, height: 14, flex: 0),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.rect(width: 48, height: 20, flex: 0),
            ],
          ],
          style: TDSkeletonRowColStyle(
            rowSpacing: (_) => 8,
          ),
        ),
      ),
    );
  }
}

/// Skeleton 占位卡片，匹配车辆列表卡片布局（基于 TDSkeleton.fromRowCol）：
///
/// 真实卡片结构：
/// ┌────────────────────────────┐
/// │ 车牌号 ← spaceBetween → 徽章│  R1: Text(16/700) + statusTag
/// │             6px             │
/// │ 申请单号 ← spaceBetween → 标签│ R2: Text(12) + purposeTag
/// │             6px             │
/// │ 路线(ellipsis) ← → 时间     │  R3: Flexible(13) + Text(12)
/// └────────────────────────────┘
class SkeletonVehicleCard extends StatelessWidget {
  const SkeletonVehicleCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: colors.bgCard,
        borderRadius: BorderRadius.circular(8),
      ),
      child: TDSkeleton.fromRowCol(
        animation: TDSkeletonAnimation.flashed,
        rowCol: TDSkeletonRowCol(
          objects: const [
            // R1: licensePlate + status badge
            [
              TDSkeletonRowColObj.text(width: 100, height: 20, flex: 0),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.rect(width: 48, height: 20, flex: 0),
            ],
            // R2: applicationNo + purpose tag
            [
              TDSkeletonRowColObj.text(width: 140, height: 14, flex: 0),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.rect(width: 40, height: 16, flex: 0),
            ],
            // R3: route + date
            [
              TDSkeletonRowColObj.text(height: 15, flex: 2),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.text(width: 120, height: 14, flex: 0),
            ],
          ],
          style: TDSkeletonRowColStyle(
            rowSpacing: (_) => 6,
          ),
        ),
      ),
    );
  }
}

/// Skeleton 占位卡片，匹配外勤日志卡片布局（基于 TDSkeleton.fromRowCol）：
///
/// 真实卡片结构：
/// ┌────────────────────────────┐
/// │ visitNo                     │  R1: Text(11)
/// │             4px             │
/// │ customerName ← → statusTag │  R2: Flexible(15/700) + statusTag
/// │             4px             │
/// │ checkInAddress              │  R3: Text(12)
/// │             4px             │
/// │ summary(ellipsis) ← → date │  R4: Flexible(12) + Text(11)
/// └────────────────────────────┘
class SkeletonOutingLogCard extends StatelessWidget {
  const SkeletonOutingLogCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: colors.bgCard,
        borderRadius: BorderRadius.circular(8),
      ),
      child: TDSkeleton.fromRowCol(
        animation: TDSkeletonAnimation.flashed,
        rowCol: TDSkeletonRowCol(
          objects: const [
            // R1: visitNo
            [TDSkeletonRowColObj.text(width: 100, height: 13)],
            // R2: customerName + statusTag
            [
              TDSkeletonRowColObj.text(height: 18, flex: 3),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.rect(width: 48, height: 20, flex: 0),
            ],
            // R3: checkInAddress
            [TDSkeletonRowColObj.text(height: 14)],
            // R4: summary + date
            [
              TDSkeletonRowColObj.text(height: 14, flex: 2),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.text(width: 80, height: 13, flex: 0),
            ],
          ],
          style: TDSkeletonRowColStyle(rowSpacing: (_) => 4),
        ),
      ),
    );
  }
}

/// Skeleton 占位卡片，匹配公告卡片布局（基于 TDSkeleton.fromRowCol）：
///
/// 真实卡片结构：
/// ┌────────────────────────────┐
/// │ title                       │  R1: Text(15/600)
/// │             8px             │
/// │ typeTag  publisher ← → date│  R2: tag(56) + SizedBox(8) + Text(12) + spaceBetween + Text(12)
/// └────────────────────────────┘
class SkeletonAnnouncementCard extends StatelessWidget {
  const SkeletonAnnouncementCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: colors.bgCard,
        borderRadius: BorderRadius.circular(8),
      ),
      child: TDSkeleton.fromRowCol(
        animation: TDSkeletonAnimation.flashed,
        rowCol: TDSkeletonRowCol(
          objects: const [
            // R1: title (full width)
            [TDSkeletonRowColObj.text(height: 18)],
            // R2: typeTag + publisher + spacer(flex:1) + date
            [
              TDSkeletonRowColObj.rect(width: 56, height: 20, flex: 0),
              TDSkeletonRowColObj.spacer(width: 8),
              TDSkeletonRowColObj.text(width: 60, height: 14, flex: 0),
              TDSkeletonRowColObj.spacer(flex: 1),
              TDSkeletonRowColObj.text(width: 120, height: 14, flex: 0),
            ],
          ],
          style: TDSkeletonRowColStyle(rowSpacing: (_) => 8),
        ),
      ),
    );
  }
}

/// Skeleton 占位卡片，匹配 [MessageItem] 布局（基于 TDSkeleton.fromRowCol）：
///
/// 真实 MessageItem 结构：
/// ┌──────────────────────────────────────────┐
/// │ [● 40×40]  标题文字...        MM-DD HH:mm │ [●] │
/// │            发送人                         │     │
/// │            摘要内容...                    │     │
/// └──────────────────────────────────────────┘
class SkeletonMessageCard extends StatelessWidget {
  const SkeletonMessageCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Container(
      height: 88,
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: colors.bgCard,
        borderRadius: BorderRadius.circular(8),
      ),
      child: Row(
        children: [
          // 左侧圆形图标占位 40×40
          TDSkeleton.fromRowCol(
            animation: TDSkeletonAnimation.flashed,
            rowCol: TDSkeletonRowCol(
              objects: const [
                [TDSkeletonRowColObj.rect(width: 40, height: 40, flex: 0)],
              ],
            ),
          ),
          const SizedBox(width: 12),
          // 中间三行文字骨架
          Expanded(
            child: TDSkeleton.fromRowCol(
              animation: TDSkeletonAnimation.flashed,
              rowCol: TDSkeletonRowCol(
                objects: const [
                  // R1: 标题(宽) + 时间(窄)
                  [
                    TDSkeletonRowColObj.text(height: 17, flex: 3),
                    TDSkeletonRowColObj.spacer(flex: 1),
                    TDSkeletonRowColObj.text(width: 80, height: 13, flex: 0),
                  ],
                  // R2: 发送人
                  [TDSkeletonRowColObj.text(width: 80, height: 13, flex: 0)],
                  // R3: 摘要
                  [TDSkeletonRowColObj.text(height: 13, flex: 2)],
                ],
                style: TDSkeletonRowColStyle(rowSpacing: (_) => 2),
              ),
            ),
          ),
          const SizedBox(width: 12),
          // 右侧未读红点占位 8×8
          TDSkeleton.fromRowCol(
            animation: TDSkeletonAnimation.flashed,
            rowCol: TDSkeletonRowCol(
              objects: const [
                [TDSkeletonRowColObj.rect(width: 8, height: 8, flex: 0)],
              ],
            ),
          ),
        ],
      ),
    );
  }
}

/// 列表加载态：骨架卡片占位
///
/// [cardCount] 骨架卡片数量，默认 5
/// [cardBuilder] 骨架卡片构建器，默认 [SkeletonListCard]
class SkeletonLoadingList extends StatelessWidget {
  final int cardCount;
  final Widget Function() cardBuilder;

  const SkeletonLoadingList({
    super.key,
    this.cardCount = 5,
    this.cardBuilder = _defaultBuilder,
  });

  static Widget _defaultBuilder() => const SkeletonListCard();

  @override
  Widget build(BuildContext context) {
    return ListView(
      padding: const EdgeInsets.fromLTRB(16, 16, 16, 24),
      physics: const NeverScrollableScrollPhysics(),
      children: List.generate(
        cardCount,
        (_) => Padding(
          padding: const EdgeInsets.only(bottom: 16),
          child: cardBuilder(),
        ),
      ),
    );
  }
}