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

/// 骨架占位卡片容器（列表加载态）
class SkeletonLoadingList extends StatelessWidget {
  final int cardCount;
  final Widget Function() cardBuilder;
  final EdgeInsetsGeometry padding;

  const SkeletonLoadingList({
    super.key,
    this.cardCount = 5,
    this.cardBuilder = _defaultBuilder,
    this.padding = const EdgeInsets.fromLTRB(16, 16, 16, 24),
  });

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

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      padding: padding,
      child: Skeletonizer(
        enabled: true,
        child: Column(
          children: List.generate(
            cardCount,
            (_) => Padding(
              padding: const EdgeInsets.only(bottom: 16),
              child: cardBuilder(),
            ),
          ),
        ),
      ),
    );
  }
}

/// 匹配 ListCard 的骨架占位
class SkeletonListCard extends StatelessWidget {
  const SkeletonListCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Skeletonizer(
      enabled: true,
      child: Container(
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: colors.bgCard,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [Bone.text(width: 120), Bone.text(width: 80)],
            ),
            SizedBox(height: 6),
            Bone.text(width: 140),
            SizedBox(height: 6),
            Bone.text(),
            SizedBox(height: 8),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Bone.text(width: 100),
                Bone(
                  width: 48,
                  height: 20,
                  borderRadius: BorderRadius.circular(4),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

/// 匹配车辆列表卡片的骨架占位
class SkeletonVehicleCard extends StatelessWidget {
  const SkeletonVehicleCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Skeletonizer(
      enabled: true,
      child: Container(
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: colors.bgCard,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Bone.text(width: 100),
                Bone(
                  width: 48,
                  height: 20,
                  borderRadius: BorderRadius.circular(4),
                ),
              ],
            ),
            SizedBox(height: 6),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Bone.text(width: 140),
                Bone(
                  width: 40,
                  height: 16,
                  borderRadius: BorderRadius.circular(4),
                ),
              ],
            ),
            SizedBox(height: 6),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Expanded(child: Bone.text()),
                const SizedBox(width: 8),
                Bone.text(width: 120),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

/// 匹配外勤日志卡片的骨架占位
class SkeletonOutingLogCard extends StatelessWidget {
  const SkeletonOutingLogCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Skeletonizer(
      enabled: true,
      child: Container(
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: colors.bgCard,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Bone.text(width: 100),
            SizedBox(height: 4),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Expanded(flex: 3, child: Bone.text()),
                const SizedBox(width: 8),
                Bone(
                  width: 48,
                  height: 20,
                  borderRadius: BorderRadius.circular(4),
                ),
              ],
            ),
            SizedBox(height: 4),
            Bone.text(),
            SizedBox(height: 4),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Expanded(flex: 2, child: Bone.text()),
                const SizedBox(width: 8),
                Bone.text(width: 80),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

/// 匹配公告卡片的骨架占位
class SkeletonAnnouncementCard extends StatelessWidget {
  const SkeletonAnnouncementCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Skeletonizer(
      enabled: true,
      child: Container(
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: colors.bgCard,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Bone.text(),
            SizedBox(height: 8),
            Row(
              children: [
                Bone(
                  width: 56,
                  height: 20,
                  borderRadius: BorderRadius.circular(4),
                ),
                const SizedBox(width: 8),
                Bone.text(width: 60),
                const Spacer(),
                Bone.text(width: 120),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

/// 匹配费用申请导入列表卡片的骨架占位
class SkeletonImportCard extends StatelessWidget {
  const SkeletonImportCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Skeletonizer(
      enabled: true,
      child: Container(
        padding: const EdgeInsets.fromLTRB(16, 12, 16, 8),
        decoration: BoxDecoration(
          color: colors.bgCard,
          borderRadius: BorderRadius.circular(12),
        ),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                Bone.square(size: 22, borderRadius: BorderRadius.circular(4)),
                const SizedBox(width: 8),
                Expanded(flex: 3, child: Bone.text()),
                const Spacer(),
                Bone.text(width: 80),
              ],
            ),
            SizedBox(height: 8),
            Row(children: [const SizedBox(width: 30), Bone.text(width: 140)]),
            SizedBox(height: 8),
            Row(
              children: [
                Bone.square(size: 18, borderRadius: BorderRadius.circular(4)),
                const SizedBox(width: 4),
                Bone.text(width: 24),
                const SizedBox(width: 8),
                Expanded(flex: 3, child: Bone.text()),
                const Spacer(),
                Bone.text(width: 64),
              ],
            ),
            SizedBox(height: 8),
            Row(
              children: [
                const SizedBox(width: 54),
                Expanded(flex: 2, child: Bone.text()),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

/// 匹配消息卡片的骨架占位
class SkeletonMessageCard extends StatelessWidget {
  const SkeletonMessageCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Skeletonizer(
      enabled: true,
      child: Container(
        height: 88,
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: colors.bgCard,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Row(
          children: [
            Bone.circle(size: 40),
            SizedBox(width: 12),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Expanded(flex: 3, child: Bone.text()),
                      const Spacer(),
                      Bone.text(width: 80),
                    ],
                  ),
                  SizedBox(height: 2),
                  Bone.text(width: 80),
                  SizedBox(height: 2),
                  Expanded(flex: 2, child: Bone.text()),
                ],
              ),
            ),
            SizedBox(width: 12),
            Bone(width: 8, height: 8, borderRadius: BorderRadius.circular(4)),
          ],
        ),
      ),
    );
  }
}

/// 详情页骨架（ExpenseDetailPage / ExpenseApplyDetailPage）
/// 匹配 FormSection 卡片布局：基本信息 + 明细 + 附件
class SkeletonDetailPage extends StatelessWidget {
  const SkeletonDetailPage({super.key});

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      padding: const EdgeInsets.fromLTRB(16, 16, 16, 24),
      child: Skeletonizer(
        enabled: true,
        child: Column(
          children: [
            _FormCard(rows: 7),
            const SizedBox(height: 16),
            _FormCard(rows: 2),
            const SizedBox(height: 16),
            _FormCard(rows: 3),
            const SizedBox(height: 24),
            const Center(child: Bone(width: 120, height: 14)),
          ],
        ),
      ),
    );
  }
}

/// 表单页骨架（ExpenseApplyCreatePage / ExpenseCreatePage）
/// 匹配 FormSection + 输入框 + 底部操作栏布局
class SkeletonFormPage extends StatelessWidget {
  final bool showImportLink;
  const SkeletonFormPage({super.key, this.showImportLink = false});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final bottomPadding = MediaQuery.of(context).padding.bottom;
    return Stack(
      children: [
        SingleChildScrollView(
          padding: EdgeInsets.fromLTRB(16, 16, 16, 80 + bottomPadding),
          child: Skeletonizer(
            enabled: true,
            child: Column(
              children: [
                if (showImportLink) ...[
                  // 导入申请单按钮骨架
                  Container(
                    padding: const EdgeInsets.symmetric(
                      horizontal: 12,
                      vertical: 10,
                    ),
                    decoration: BoxDecoration(
                      color: colors.bgCard,
                      borderRadius: BorderRadius.circular(12),
                    ),
                    child: Row(
                      children: [
                        Bone.square(
                          size: 20,
                          borderRadius: BorderRadius.circular(4),
                        ),
                        const SizedBox(width: 8),
                        Bone(width: 160, height: 14),
                      ],
                    ),
                  ),
                  const SizedBox(height: 16),
                ],
                _FormCard(rows: 5),
                const SizedBox(height: 16),
                _FormCard(rows: 2),
                const SizedBox(height: 16),
                _FormCard(rows: 3),
                const SizedBox(height: 24),
                const Center(child: Bone(width: 120, height: 14)),
              ],
            ),
          ),
        ),
        // 底部操作栏骨架，贴底并适配安全区
        Positioned(
          left: 0,
          right: 0,
          bottom: 0,
          child: Skeletonizer(
            enabled: true,
            child: Container(
              padding: EdgeInsets.fromLTRB(16, 12, 16, 12 + bottomPadding),
              decoration: BoxDecoration(
                color: colors.bgCard,
                border: Border(top: BorderSide(color: colors.border)),
              ),
              child: Row(
                children: [
                  Expanded(
                    child: Bone(
                      height: 44,
                      borderRadius: BorderRadius.circular(8),
                    ),
                  ),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Bone(
                      height: 44,
                      borderRadius: BorderRadius.circular(8),
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      ],
    );
  }
}

class _FormCard extends StatelessWidget {
  final int rows;
  const _FormCard({required this.rows});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: colors.bgCard,
        borderRadius: BorderRadius.circular(12),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Bone.square(size: 20, borderRadius: BorderRadius.circular(4)),
              const SizedBox(width: 8),
              Bone(width: 80, height: 16),
              const Spacer(),
              Bone(width: 40, height: 16),
            ],
          ),
          const SizedBox(height: 20),
          ...List.generate(
            rows,
            (i) => Padding(
              padding: EdgeInsets.only(bottom: i < rows - 1 ? 16 : 0),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Bone(width: 64, height: 14),
                  Bone(width: 140 + (i % 3) * 20, height: 14),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}

// ═══ 报表页骨架 — 各页面按实际布局独立定义 ═══

/// 事前申请明细报表骨架（ExpenseApplyDetailReportPage）
/// 布局：筛选栏 + 统计卡片(1行2个) + 折线图(单线) + 明细列表
class SkeletonExpenseApplyDetailReportPage extends StatelessWidget {
  const SkeletonExpenseApplyDetailReportPage({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Column(
      children: [
        _dateFilterChip(colors),
        Expanded(
          child: SingleChildScrollView(
            child: Skeletonizer(
              enabled: true,
              child: Column(
                children: [
                  // 统计卡片 — 1行2列
                  Padding(
                    padding: const EdgeInsets.fromLTRB(12, 12, 12, 0),
                    child: Row(
                      children: [
                        Expanded(
                          child: Bone(
                            height: 80,
                            borderRadius: BorderRadius.circular(8),
                          ),
                        ),
                        const SizedBox(width: 8),
                        Expanded(
                          child: Bone(
                            height: 80,
                            borderRadius: BorderRadius.circular(8),
                          ),
                        ),
                      ],
                    ),
                  ),
                  const SizedBox(height: 16),
                  // 折线图 — 标题 + 1个图例 + 图表区
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12),
                    child: Container(
                      padding: const EdgeInsets.all(16),
                      decoration: BoxDecoration(
                        color: colors.bgCard,
                        borderRadius: BorderRadius.circular(8),
                      ),
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Bone(width: 120, height: 16),
                          const SizedBox(height: 8),
                          Row(
                            children: [
                              Bone.square(
                                size: 8,
                                borderRadius: BorderRadius.circular(4),
                              ),
                              const SizedBox(width: 4),
                              Bone(width: 60, height: 12),
                            ],
                          ),
                          const SizedBox(height: 16),
                          Row(
                            children: [
                              Expanded(
                                child: Bone(
                                  height: 200,
                                  borderRadius: BorderRadius.circular(8),
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                  const SizedBox(height: 16),
                  // 明细列表
                  _detailListSkeleton(colors),
                  const SizedBox(height: 80),
                ],
              ),
            ),
          ),
        ),
      ],
    );
  }
}

/// 费用报销明细报表骨架（ExpenseDetailReportPage）
/// 布局：筛选栏 + 统计卡片(2+1) + 双折线图 + 柱形图 + 明细列表
class SkeletonExpenseDetailReportPage extends StatelessWidget {
  const SkeletonExpenseDetailReportPage({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    return Column(
      children: [
        _dateFilterChip(colors),
        Expanded(
          child: SingleChildScrollView(
            child: Skeletonizer(
              enabled: true,
              child: Column(
                children: [
                  // 统计卡片 — 1行2列 + 1个全宽
                  Padding(
                    padding: const EdgeInsets.fromLTRB(12, 12, 12, 0),
                    child: Row(
                      children: [
                        Expanded(
                          child: Bone(
                            height: 80,
                            borderRadius: BorderRadius.circular(8),
                          ),
                        ),
                        const SizedBox(width: 8),
                        Expanded(
                          child: Bone(
                            height: 80,
                            borderRadius: BorderRadius.circular(8),
                          ),
                        ),
                      ],
                    ),
                  ),
                  const SizedBox(height: 8),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12),
                    child: Row(
                      children: [
                        Expanded(
                          child: Bone(
                            height: 80,
                            borderRadius: BorderRadius.circular(8),
                          ),
                        ),
                      ],
                    ),
                  ),
                  const SizedBox(height: 16),
                  // 双折线图 — 标题 + 2个图例 + 图表区
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12),
                    child: Container(
                      padding: const EdgeInsets.all(16),
                      decoration: BoxDecoration(
                        color: colors.bgCard,
                        borderRadius: BorderRadius.circular(8),
                      ),
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Bone(width: 120, height: 16),
                          const SizedBox(height: 8),
                          Row(
                            children: [
                              Bone.square(
                                size: 8,
                                borderRadius: BorderRadius.circular(4),
                              ),
                              const SizedBox(width: 4),
                              Bone(width: 60, height: 12),
                              const SizedBox(width: 16),
                              Bone.square(
                                size: 8,
                                borderRadius: BorderRadius.circular(4),
                              ),
                              const SizedBox(width: 4),
                              Bone(width: 60, height: 12),
                            ],
                          ),
                          const SizedBox(height: 16),
                          Row(
                            children: [
                              Expanded(
                                child: Bone(
                                  height: 200,
                                  borderRadius: BorderRadius.circular(8),
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                  const SizedBox(height: 16),
                  // 柱形图 — 标题 + 图表区
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12),
                    child: Container(
                      padding: const EdgeInsets.all(16),
                      decoration: BoxDecoration(
                        color: colors.bgCard,
                        borderRadius: BorderRadius.circular(8),
                      ),
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Bone(width: 160, height: 16),
                          const SizedBox(height: 16),
                          Row(
                            children: [
                              Expanded(
                                child: Bone(
                                  height: 220,
                                  borderRadius: BorderRadius.circular(8),
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                  const SizedBox(height: 12),
                  // 明细列表
                  _detailListSkeleton(colors),
                  const SizedBox(height: 80),
                ],
              ),
            ),
          ),
        ),
      ],
    );
  }
}

// ── 日期筛选 chip 占位 ──
Widget _dateFilterChip(AppColorsExtension colors) => Container(
  padding: const EdgeInsets.fromLTRB(12, 8, 12, 12),
  color: colors.bgCard,
  child: Container(
    height: 40,
    decoration: BoxDecoration(
      color: colors.bgSecondaryContainer,
      borderRadius: BorderRadius.circular(20),
    ),
  ),
);

// ── 明细列表骨架 ──
Widget _detailListSkeleton(AppColorsExtension colors) => Padding(
  padding: const EdgeInsets.symmetric(horizontal: 12),
  child: Container(
    width: double.infinity,
    decoration: BoxDecoration(
      color: colors.bgCard,
      borderRadius: BorderRadius.circular(8),
    ),
    child: Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Padding(
          padding: const EdgeInsets.fromLTRB(16, 12, 16, 8),
          child: Row(
            children: [
              Bone(width: 80, height: 16),
              const Spacer(),
              Bone(width: 100, height: 14),
            ],
          ),
        ),
        const Divider(height: 1),
        ...List.generate(4, (i) {
          return Column(
            children: [
              Padding(
                padding: const EdgeInsets.symmetric(
                  horizontal: 16,
                  vertical: 12,
                ),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        Bone(width: 120 + (i % 3) * 40, height: 14),
                        Bone(width: 80, height: 16),
                      ],
                    ),
                    const SizedBox(height: 6),
                    Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        Bone(width: 90, height: 12),
                        Bone(width: 80, height: 16),
                      ],
                    ),
                    if (i == 0) ...[
                      const SizedBox(height: 6),
                      Bone(width: 200, height: 14),
                    ],
                  ],
                ),
              ),
              if (i < 3) const Divider(height: 1),
            ],
          );
        }),
      ],
    ),
  ),
);