import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:yumi/ui_kit/components/sc_compontent.dart';
import 'package:yumi/ui_kit/components/sc_rotating_dots_loading.dart';
import 'package:yumi/ui_kit/components/text/sc_text.dart';
import 'package:yumi/ui_kit/theme/socialchat_theme.dart';
import 'package:yumi/shared/business_logic/models/res/gift_res.dart';
import 'package:yumi/services/general/sc_app_general_manager.dart';
import 'package:provider/provider.dart';
import 'package:yumi/app_localizations.dart';
import 'package:yumi/app/config/business_logic_strategy.dart';
import 'package:yumi/app/constants/sc_global_config.dart';

enum _GiftGridPageStatus { idle, loading, ready }

const Duration _kGiftPageSkeletonMinDuration = Duration(milliseconds: 420);
const Duration _kGiftPageSkeletonMaxDuration = Duration(milliseconds: 900);
const int _kGiftGridColumnCount = 4;
const int _kGiftGridRowCount = 2;
const double _kGiftGridCardHeight = 76;
const double _kGiftGridVerticalPadding = 5;
const double _kGiftGridMainAxisSpacing = 2;
const double _kGiftGridCrossAxisSpacing = 8;
const double _kGiftCardVerticalPadding = 5;
const double _kGiftIconPriceSpacing = 1;
const double _kGiftPriceRowHeight = 14;
const double _kGiftGridTopGap = 5;
const double _kGiftIndicatorTopGap = 5;
const double _kGiftPageIndicatorHeight = 6.5;
const double _kGiftGridBottomPadding = 6;
const double _kGiftGridHeight =
    _kGiftGridCardHeight * _kGiftGridRowCount +
    _kGiftGridMainAxisSpacing * (_kGiftGridRowCount - 1) +
    _kGiftGridVerticalPadding * 2;
const double kGiftTabPageHeight =
    _kGiftGridTopGap +
    _kGiftGridHeight +
    _kGiftIndicatorTopGap +
    _kGiftPageIndicatorHeight +
    _kGiftGridBottomPadding;

class GiftTabPage extends StatefulWidget {
  final String type;
  final bool isDark;
  final ValueChanged<SocialChatGiftRes?> checkedCall;

  const GiftTabPage(
    this.type,
    this.checkedCall, {
    super.key,
    this.isDark = true,
  });

  @override
  State<GiftTabPage> createState() => _GiftTabPageState();
}

class _GiftTabPageState extends State<GiftTabPage>
    with AutomaticKeepAliveClientMixin {
  final PageController _giftPageController = PageController();
  final Map<int, _GiftGridPageStatus> _pageStatuses =
      <int, _GiftGridPageStatus>{};
  int _index = 0;
  int checkedIndex = 0;

  BusinessLogicStrategy get _strategy => SCGlobalConfig.businessLogicStrategy;

  @override
  bool get wantKeepAlive => true;

  @override
  void initState() {
    super.initState();
    checkedIndex = widget.type == "CUSTOMIZED" ? 1 : 0;
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Consumer<SCAppGeneralManager>(
      builder: (context, ref, child) {
        final gifts = ref.giftByTab[widget.type] ?? <SocialChatGiftRes>[];
        if (gifts.isNotEmpty) {
          _schedulePageWarmup(ref, gifts, _index);
        }
        return gifts.isEmpty
            ? (ref.isGiftTabLoading(widget.type)
                ? _buildGiftPageSkeleton()
                : mainEmpty(
                  textColor: Colors.white54,
                  msg: SCAppLocalizations.of(context)!.noData,
                ))
            : Column(
              children: [
                SizedBox(height: _kGiftGridTopGap.w),
                SizedBox(
                  height: _kGiftGridHeight.w,
                  child: PageView.builder(
                    controller: _giftPageController,
                    onPageChanged: (i) {
                      setState(() {
                        _index = i;
                      });
                      _schedulePageWarmup(ref, gifts, i);
                    },
                    itemBuilder: (c, i) {
                      _schedulePageWarmup(ref, gifts, i);
                      var current = (gifts.length - (i * 8));
                      int size =
                          current > 8
                              ? 8
                              : current % 8 == 0
                              ? 8
                              : current % 8;
                      if ((_pageStatuses[i] ?? _GiftGridPageStatus.idle) !=
                          _GiftGridPageStatus.ready) {
                        return _buildGiftPageSkeleton();
                      }
                      return _buildGiftGrid(
                        itemCount: size,
                        itemBuilder: (BuildContext context, int index) {
                          return _bagItem(gifts[(i * 8) + index], ref);
                        },
                      );
                    },
                    itemCount: (gifts.length / 8).ceil(),
                  ),
                ),
                SizedBox(height: _kGiftIndicatorTopGap.w),
                _indicator(ref),
                SizedBox(height: _kGiftGridBottomPadding.w),
              ],
            );
      },
    );
  }

  void _schedulePageWarmup(
    SCAppGeneralManager ref,
    List<SocialChatGiftRes> gifts,
    int pageIndex,
  ) {
    final totalPages = (gifts.length / 8).ceil();
    _ensurePageReady(ref, totalPages, pageIndex);
    _ensurePageReady(ref, totalPages, pageIndex + 1);
  }

  void _ensurePageReady(
    SCAppGeneralManager ref,
    int totalPages,
    int pageIndex,
  ) {
    if (pageIndex < 0 || pageIndex >= totalPages) {
      return;
    }
    final status = _pageStatuses[pageIndex] ?? _GiftGridPageStatus.idle;
    if (status == _GiftGridPageStatus.loading ||
        status == _GiftGridPageStatus.ready) {
      return;
    }
    _pageStatuses[pageIndex] = _GiftGridPageStatus.loading;
    WidgetsBinding.instance.addPostFrameCallback((_) async {
      final warmupTask = ref.warmGiftPageCovers(
        widget.type,
        pageIndex: pageIndex,
      );
      await Future.any<void>([
        Future.wait<void>([
          warmupTask,
          Future<void>.delayed(_kGiftPageSkeletonMinDuration),
        ]),
        Future<void>.delayed(_kGiftPageSkeletonMaxDuration),
      ]);
      if (!mounted) {
        return;
      }
      setState(() {
        _pageStatuses[pageIndex] = _GiftGridPageStatus.ready;
      });
    });
  }

  Widget _buildGiftPageSkeleton() {
    return Stack(
      children: [
        Positioned.fill(
          child: DecoratedBox(
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(12.w),
              gradient: LinearGradient(
                begin: Alignment.topCenter,
                end: Alignment.bottomCenter,
                colors: [
                  Colors.white.withValues(alpha: 0.1),
                  Colors.white.withValues(alpha: 0.04),
                ],
              ),
            ),
          ),
        ),
        Positioned.fill(
          child: Center(
            child: Container(
              width: 132.w,
              height: 132.w,
              decoration: BoxDecoration(
                color: Colors.black.withValues(alpha: 0.08),
                borderRadius: BorderRadius.circular(20.w),
                border: Border.all(
                  color: Colors.white.withValues(alpha: 0.12),
                  width: 1.w,
                ),
              ),
              alignment: Alignment.center,
              child: Opacity(
                opacity: 0.9,
                child: SCRotatingDotsLoading(size: 72.w),
              ),
            ),
          ),
        ),
        Positioned.fill(
          child: _buildGiftGrid(
            itemCount: 8,
            itemBuilder: (context, index) => _buildGiftSkeletonCard(),
          ),
        ),
      ],
    );
  }

  Widget _buildGiftSkeletonCard() {
    final baseColor = Colors.white.withValues(alpha: 0.12);
    return Container(
      decoration: BoxDecoration(borderRadius: BorderRadius.circular(12.w)),
      child: Padding(
        padding: EdgeInsets.symmetric(vertical: _kGiftCardVerticalPadding.w),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: [
            Container(
              width: 48.w,
              height: 48.w,
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(12.w),
                color: baseColor,
              ),
              child: Center(child: SCRotatingDotsLoading(size: 24.w)),
            ),
            SizedBox(height: _kGiftIconPriceSpacing.w),
            Container(
              width: 52.w,
              height: 8.w,
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(999.w),
                color: baseColor,
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildGiftGrid({
    required int itemCount,
    required IndexedWidgetBuilder itemBuilder,
  }) {
    return LayoutBuilder(
      builder: (context, constraints) {
        final horizontalPadding = 12.w;
        final verticalPadding = _kGiftGridVerticalPadding.w;
        final mainAxisSpacing = _kGiftGridMainAxisSpacing.w;
        final crossAxisSpacing = _kGiftGridCrossAxisSpacing.w;
        final itemHeight = _kGiftGridCardHeight.w;
        final gridWidth =
            constraints.maxWidth -
            horizontalPadding * 2 -
            crossAxisSpacing * (_kGiftGridColumnCount - 1);
        final itemWidth = (gridWidth / _kGiftGridColumnCount).clamp(
          1.0,
          double.infinity,
        );
        return GridView.builder(
          padding: EdgeInsets.symmetric(
            horizontal: horizontalPadding,
            vertical: verticalPadding,
          ),
          physics: const NeverScrollableScrollPhysics(),
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: _kGiftGridColumnCount,
            childAspectRatio: itemWidth / itemHeight,
            mainAxisSpacing: mainAxisSpacing,
            crossAxisSpacing: crossAxisSpacing,
          ),
          itemCount: itemCount,
          itemBuilder: itemBuilder,
        );
      },
    );
  }

  Widget _buildGiftCoverLoading() {
    return Container(
      width: 48.w,
      height: 48.w,
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(12.w),
        color: Colors.white.withValues(alpha: 0.08),
      ),
      alignment: Alignment.center,
      child: SCRotatingDotsLoading(size: 24.w),
    );
  }

  Widget _buildGiftCoverNoData() {
    return Container(
      width: 48.w,
      height: 48.w,
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(12.w),
        color: Colors.white.withValues(alpha: 0.08),
      ),
      clipBehavior: Clip.antiAlias,
      child: Image.asset(
        "sc_images/general/sc_icon_loading.png",
        fit: BoxFit.cover,
      ),
    );
  }

  Widget _bagItem(SocialChatGiftRes gift, SCAppGeneralManager ref) {
    return gift.id == "-1000"
        ? GestureDetector(
          behavior: HitTestBehavior.opaque,
          child: Stack(
            children: [
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(12.w),
                  border: Border.all(color: Colors.transparent, width: 1.w),
                ),
                child: Padding(
                  padding: EdgeInsets.symmetric(
                    vertical: _kGiftCardVerticalPadding.w,
                  ),
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: [
                      Image.asset(
                        _strategy.getGiftPageCustomizedRuleIcon(),
                        fit: BoxFit.cover,
                        width: 48.w,
                        height: 48.w,
                      ),
                      SizedBox(height: _kGiftIconPriceSpacing.w),
                      Container(
                        height: 12.w,
                        margin: EdgeInsets.symmetric(horizontal: 3.w),
                        alignment: Alignment.center,
                        child: text(
                          SCAppLocalizations.of(context)!.rulesUpload,
                          maxLines: 1,
                          fontSize: 10,
                          letterSpacing: 0.1,
                          lineHeight: 1,
                          textAlign: TextAlign.center,
                          fontWeight: FontWeight.w600,
                          textColor: Colors.white,
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
          onTap: () {
            SmartDialog.show(
              tag: "showCustomizedRule",
              alignment: Alignment.bottomCenter,
              animationType: SmartAnimationType.fade,
              builder: (_) {
                return SafeArea(
                  top: false,
                  child: ClipRect(
                    child: BackdropFilter(
                      filter: ui.ImageFilter.blur(sigmaX: 15, sigmaY: 15),
                      child: Stack(
                        alignment: Alignment.topCenter,
                        children: [
                          Container(
                            height: ScreenUtil().screenHeight * 0.7,
                            decoration: BoxDecoration(
                              color: Colors.black54,
                              borderRadius: BorderRadius.only(
                                topLeft: Radius.circular(12.w),
                                topRight: Radius.circular(12.w),
                              ),
                            ),
                            child: Column(
                              children: [
                                SizedBox(height: 10.w),
                                text(
                                  SCAppLocalizations.of(
                                    context,
                                  )!.customizedGiftRules,
                                  textColor: Colors.white,
                                  fontSize: 14.sp,
                                  fontWeight: FontWeight.w600,
                                ),
                                SizedBox(height: 7.w),
                                Expanded(
                                  child: SingleChildScrollView(
                                    child: Container(
                                      margin: EdgeInsets.symmetric(
                                        horizontal: 12.w,
                                      ),
                                      child: Text(
                                        SCAppLocalizations.of(
                                          context,
                                        )!.customizedGiftRulesContent,
                                        style: TextStyle(
                                          color: Colors.white,
                                          fontSize: 12.sp,
                                          fontWeight: FontWeight.w600,
                                        ),
                                      ),
                                    ),
                                  ),
                                ),
                                SizedBox(height: 10.w),
                              ],
                            ),
                          ),
                        ],
                      ),
                    ),
                  ),
                );
              },
            );
          },
        )
        : GestureDetector(
          behavior: HitTestBehavior.opaque,
          child: Container(
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(12.w),
              border: Border.all(
                color:
                    checkedIndex == ref.giftByTab[widget.type]!.indexOf(gift)
                        ? SocialChatTheme.primaryLight
                        : Colors.transparent,
                width: 1.w,
              ),
            ),
            child: Padding(
              padding: EdgeInsets.symmetric(
                vertical: _kGiftCardVerticalPadding.w,
              ),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.start,
                children: [
                  netImage(
                    url: gift.giftPhoto ?? "",
                    fit: BoxFit.cover,
                    width: 48.w,
                    height: 48.w,
                    loadingWidget: _buildGiftCoverLoading(),
                    errorWidget: _buildGiftCoverNoData(),
                  ),
                  SizedBox(height: _kGiftIconPriceSpacing.w),
                  SizedBox(
                    height: _kGiftPriceRowHeight.w,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children:
                          _isBackpackTab
                              ? [
                                text(
                                  "x${_formatBackpackQuantity(gift)}",
                                  fontSize: 10,
                                  lineHeight: 1,
                                  fontWeight: FontWeight.w600,
                                  textColor:
                                      widget.isDark
                                          ? SocialChatTheme.primaryLight
                                          : SocialChatTheme.primaryColor,
                                ),
                              ]
                              : [
                                Image.asset(
                                  _strategy.getGiftPageGoldCoinIcon(),
                                  width: 14.w,
                                  height: 14.w,
                                ),
                                SizedBox(width: 3.w),
                                text(
                                  "${gift.giftCandy}",
                                  fontSize: 10,
                                  lineHeight: 1,
                                  textColor:
                                      widget.isDark
                                          ? Colors.white
                                          : Colors.black,
                                ),
                              ],
                    ),
                  ),
                ],
              ),
            ),
          ),
          onTap: () {
            setState(() {
              checkedIndex = ref.giftByTab[widget.type]!.indexOf(gift);
              widget.checkedCall(gift);
            });
          },
        );
  }

  bool get _isBackpackTab => widget.type == SCAppGeneralManager.backpackGiftTab;

  String _formatBackpackQuantity(SocialChatGiftRes gift) {
    final quantity = gift.backpackQuantity;
    if (quantity != null) {
      if (quantity % 1 == 0) {
        return quantity.toInt().toString();
      }
      return quantity.toString();
    }
    return gift.quantity ?? '0';
  }

  _indicator(SCAppGeneralManager ref) {
    var size = (ref.giftByTab[widget.type]!.length) / 8;
    var list = <Widget>[];
    for (int i = 0; i < size; i++) {
      list.add(
        Container(
          width: 6.5.w,
          height: 6.5.w,
          margin: EdgeInsets.symmetric(horizontal: 4.w),
          decoration: BoxDecoration(
            shape: BoxShape.circle,
            color:
                _index == i ? SocialChatTheme.primaryColor : Color(0xffDADADA),
          ),
        ),
      );
    }
    return Row(mainAxisAlignment: MainAxisAlignment.center, children: list);
  }
}