import 'package:flutter/src/widgets/framework.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:keyboard/base/base_page.dart';
import 'package:keyboard/module/store/new_discount/new_discount_controller.dart';
import 'package:flutter/material.dart';
import 'package:carousel_slider/carousel_slider.dart';
import 'package:get/get.dart';

import '../../../data/bean/character_info.dart';
import '../../../data/consts/payment_type.dart';
import '../../../data/consts/web_url.dart';
import '../../../resource/assets.gen.dart';
import '../../../resource/colors.gen.dart';
import '../../../resource/string.gen.dart';
import '../../../router/app_pages.dart';
import '../../../utils/styles.dart';
import '../../../widget/auto_scroll_list_view.dart';
import '../../../widget/click_text_span.dart';

class NewDiscountPage extends BasePage<NewDiscountController> {
  const NewDiscountPage({super.key});

  /// 跳转
  static void start() {
    Get.toNamed(RoutePath.newDiscount);
  }

  @override
  bool immersive() {
    return true;
  }

  @override
  backgroundColor() => Colors.white;

  @override
  Widget buildBody(BuildContext context) {
    return Stack(
      children: [
        Positioned(top: 0.w, child: _buildBanner()),
        Positioned(
          top: 408.w,
          child: Container(
            decoration: BoxDecoration(
              color: ColorName.white,
              borderRadius: BorderRadius.only(
                topLeft: Radius.circular(24.r),
                topRight: Radius.circular(24.r),
              ),
            ),
            width: 360.w,
            height: 392.w,
            child: SingleChildScrollView(
              child: Column(
                children: [
                  SizedBox(height: 16.w),
                  _buildGoodsCard(),
                  SizedBox(height: 12.w),
                  _buildPayWayCard(),
                  SizedBox(height: 8.w),
                  _buildSelectedDesc(),
                  SizedBox(height: 30.w),
                  _buildMemberCard(),

                  SizedBox(height: 200.w),
                ],
              ),
            ),
          ),
        ),
        Positioned(top: 0, left: 0, right: 0, child: _buildTitle()),

        Positioned(bottom: 0, left: 0, right: 0, child: _buildBuyButtonCard()),
      ],
    );
  }

  _buildTitle() {
    return SafeArea(
      child: Container(
        alignment: Alignment.centerLeft,
        padding: EdgeInsets.only(top: 16.h, left: 16.w, right: 16.w),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            GestureDetector(
              onTap: controller.clickBack,
              child: Assets.images.iconStoreBack.image(
                width: 32.w,
                height: 32.w,
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildBanner() {
    return SizedBox(
      width: 360.w,
      child: Stack(
        children: [
          CarouselSlider(
            carouselController: controller.carouselSliderController,
            options: CarouselOptions(
              height: 438.w,
              viewportFraction: 1,
              initialPage: 0,
              enableInfiniteScroll: true,
              reverse: false,
              autoPlay: true,
              autoPlayInterval: const Duration(seconds: 3),
              autoPlayAnimationDuration: const Duration(milliseconds: 500),
              autoPlayCurve: Curves.fastOutSlowIn,
              scrollDirection: Axis.horizontal,
              onPageChanged: (index, reason) {
                controller.onBannerChanged(index, reason);
              },
            ),

            items:
                controller.bannerList.map((item) {
                  return item.image(width: 360.w, fit: BoxFit.contain);
                }).toList(),
          ),
          Positioned(
            bottom: 149.16.w,
            left: 31.w,
            child: Assets.images.iconNewDiscountCharacterTitle.image(
              width: 296.w,
              height: 39.w,
            ),
          ),
          Positioned(
            bottom: 211.13.w,
            left: 42.w,
            right: 0,
            child: _buildIndicator(),
          ),
          Positioned(
            bottom: 0,
            left: 0,
            right: 0,
            child: _buildAutoCharacterList(),
          ),
        ],
      ),
    );
  }

  /// 指示器
  _buildIndicator() {
    return Row(
      children:
          controller.bannerList.asMap().entries.map((entry) {
            return Obx(() {
              final isSelectedBanner =
                  controller.currentBannerIndex == entry.key;
              return Row(
                mainAxisAlignment: MainAxisAlignment.spaceAround,
                children: [
                  GestureDetector(
                    onTap:
                        () => controller.carouselSliderController.animateToPage(
                          entry.key,
                        ),
                    child: AnimatedContainer(
                      duration: const Duration(milliseconds: 300),
                      margin: EdgeInsets.only(right: 5.w),
                      height: 5.w,
                      width: isSelectedBanner ? 10.w : 5.w,
                      decoration: BoxDecoration(
                        color:
                            isSelectedBanner
                                ? const Color(0xff483459)
                                : const Color(0xffAFB4BF),
                        borderRadius: BorderRadius.circular(5.r),
                      ),
                    ),
                  ),
                ],
              );
            });
          }).toList(),
    );
  }

  Widget _buildAutoCharacterList() {
    return Obx(() {
      if (controller.charactersList.isEmpty) {
        return Container();
      }
      return SizedBox(
        height: 130.w,
        child: AutoScrollListView(
          itemCount: (controller.charactersList.length / 2).ceil(),
          scrollDirection: Axis.horizontal,
          itemBuilder: (context, columnIndex) {
            int rowCount = 2;
            int startIndex = columnIndex * rowCount;
            final List<CharacterInfo> columnItems =
                controller.charactersList
                    .skip(startIndex)
                    .take(rowCount)
                    .toList();
            return Column(
              children:
                  columnItems.map((item) {
                    final emoji = item.emoji ?? "";
                    final name = item.name ?? "";
                    return Padding(
                      padding: EdgeInsets.symmetric(
                        vertical: 4.w,
                        horizontal: 4.w,
                      ),
                      child: Container(
                        padding: EdgeInsets.symmetric(
                          horizontal: 12.w,
                          vertical: 6.w,
                        ),
                        decoration: ShapeDecoration(
                          color: Colors.white,
                          shape: RoundedRectangleBorder(
                            side: BorderSide(
                              width: 1.w,
                              color: const Color(0xFFF4F1FF),
                            ),
                            borderRadius: BorderRadius.circular(31.r),
                          ),
                        ),
                        child: Text(
                          "$emoji$name",
                          style: TextStyle(
                            color: Colors.black.withAlpha(204),
                            fontSize: 13.sp,
                            fontWeight: FontWeight.w400,
                          ),
                        ),
                      ),
                    );
                  }).toList(),
            );
          },
        ),
      );
    });
  }

  Widget _buildBuyButtonCard() {
    return Container(
      width: 360.w,
      padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 11.h),
      decoration: ShapeDecoration(
        color: Colors.white,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.only(
            topLeft: Radius.circular(24.r),
            topRight: Radius.circular(24.r),
          ),
        ),
        shadows: [
          BoxShadow(
            color: Color(0x99FFE498),
            blurRadius: 20,
            offset: Offset(0, 0),
            spreadRadius: 0,
          ),
        ],
      ),
      child: Column(
        children: [
          GestureDetector(
            onTap: controller.clickPayNow,
            child: Container(
              width: 328.w,
              height: 56.w,
              decoration: ShapeDecoration(
                shape: RoundedRectangleBorder(
                  side: BorderSide(width: 2.w, color: const Color(0xFFFFF6C9)),
                  borderRadius: BorderRadius.circular(30.55),
                ),
              ),
              child: Container(
                width: 328,
                height: 54,
                decoration: ShapeDecoration(
                  gradient: LinearGradient(
                    begin: Alignment(0.60, -0.39),
                    end: Alignment(0.60, 0.95),
                    colors: [
                      const Color(0xFFF95FAC),
                      const Color(0xFFFD4D99),
                      const Color(0xFFFF3E75),
                      const Color(0xFFFF0F53),
                    ],
                  ),
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(30.55),
                  ),
                ),
                child: Center(
                  child: Text(
                    StringName.newDiscountUnlockNow,
                    style: Styles.getTextStyleWhiteW500(17.sp),
                  ),
                ),
              ),
            ),
          ),
          SizedBox(height: 11.h),
          _buildPrivacyTextSpan(),
        ],
      ),
    );
  }

  Widget _buildGoodsCard() {
    return Container(
      margin: EdgeInsets.symmetric(horizontal: 16.w),

      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisAlignment: MainAxisAlignment.start,
        children: [
          Obx(() {
            final goodsList = controller.filteredGoodsList;
            return Column(
              children: List.generate(goodsList.length, (index) {
                final item = goodsList[index];
                final isSelected =
                    controller.selectedGoodsInfoItem?.id == item.id;
                return Column(
                  children: [
                    GestureDetector(
                      onTap: () => controller.onGoodsItemClick(item),
                      child: _buildGoodsItem(item, isSelected),
                    ),
                    if (index != goodsList.length - 1) SizedBox(height: 10.w),
                  ],
                );
              }),
            );
          }),
        ],
      ),
    );
  }

  Widget _buildPayWayCard() {
    return GestureDetector(
      onTap: () => controller.clickPayWaySwitch(),
      child: Container(
        margin: EdgeInsets.symmetric(horizontal: 16.w),
        height: 36.h,
        padding: EdgeInsets.symmetric(horizontal: 10.w),
        decoration: ShapeDecoration(
          shape: RoundedRectangleBorder(
            side: BorderSide(width: 1, color: const Color(0xFFECEBE0)),
            borderRadius: BorderRadius.circular(10.r),
          ),
        ),
        child: Row(
          children: [
            Text(
              StringName.storePayWay,
              style: Styles.getTextStyleBlack204W400(14.sp),
            ),
            const Spacer(),
            Obx(() {
              if (controller.selectedPayWay == null) {
                return SizedBox.shrink();
              }
              return Row(
                children: [
                  Image.asset(
                    getPaymentIconPath(
                      payMethod: controller.selectedPayWay!.payMethod,
                      payPlatform: controller.selectedPayWay!.payPlatform,
                    ),
                    width: 20.w,
                    height: 20.w,
                  ),
                  SizedBox(width: 4.w),
                  Text(
                    controller.selectedPayWay?.title ?? '',
                    style: Styles.getTextStyleBlack204W400(14.sp),
                  ),
                  SizedBox(width: 6.w),
                  Assets.images.iconStoreSwitchPay.image(
                    width: 20.w,
                    height: 20.w,
                    fit: BoxFit.fill,
                  ),
                ],
              );
            }),
          ],
        ),
      ),
    );
  }

  Widget _buildGoodsItem(item, bool isSelected) {
    return Container(
      height: 70.w,
      width: 328.w,
      padding: EdgeInsets.symmetric(horizontal: 16.w),
      decoration:
          isSelected
              ? BoxDecoration(
                borderRadius: BorderRadius.circular(16.w),
                image: DecorationImage(
                  image: Assets.images.bgNewDiscountItemSelect.provider(),
                  fit: BoxFit.fill,
                ),
              )
              : BoxDecoration(
                borderRadius: BorderRadius.circular(16.w),
                image: DecorationImage(
                  image: Assets.images.bgNewDiscountItemUnselect.provider(),
                  fit: BoxFit.fill,
                ),
              ),
      child: Row(
        children: [
          Text(
            "￥",
            style: TextStyle(
              color:
                  isSelected
                      ? const Color(0xFFFF684E)
                      : Colors.black.withAlpha(204),
              fontSize: 16.sp,
              fontWeight: FontWeight.w700,
            ),
          ),
          Text(
            '${item.amountText}',
            textAlign: TextAlign.center,
            style: TextStyle(
              color:
                  isSelected
                      ? const Color(0xFFFF684E)
                      : Colors.black.withAlpha(204),
              fontSize: 29.sp,
              fontWeight: FontWeight.w700,
            ),
          ),
          SizedBox(width: 9.w),
          Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Row(
                children: [
                  Text(
                    item.name,
                    style: TextStyle(
                      color: Colors.black.withAlpha(204),
                      fontSize: 14.sp,
                      fontWeight: FontWeight.w500,
                    ),
                  ),

                  SizedBox(width: 4.5.w),
                  if (item.mostDesc?.isNotEmpty == true)
                    Container(
                      padding: EdgeInsets.symmetric(
                        horizontal: 4.w,
                        vertical: 2.w,
                      ),
                      margin: EdgeInsets.only(bottom: 4.w),
                      decoration: ShapeDecoration(
                        gradient: LinearGradient(
                          begin: Alignment(0.00, 0.50),
                          end: Alignment(1.00, 0.50),
                          colors: [
                            const Color(0xFFFF684E),
                            const Color(0xFFFF4F9A),
                          ],
                        ),
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.only(
                            topLeft: Radius.circular(10.50),
                            topRight: Radius.circular(10.50),
                            bottomRight: Radius.circular(10.50),
                          ),
                        ),
                      ),
                      child: Text(
                        item.mostDesc!,
                        style: TextStyle(
                          color: Colors.white,
                          fontSize: 12.sp,
                          fontWeight: FontWeight.w500,
                        ),
                      ),
                    ),
                ],
              ),
              Text(
                item.priceDesc,
                style: TextStyle(
                  color: Colors.black.withAlpha(153),
                  fontSize: 12.sp,
                  fontWeight: FontWeight.w400,
                ),
              ),
            ],
          ),
          Spacer(),
          isSelected
              ? Assets.images.iconCustomCharacterAddDialogSelect.image(
                width: 20.w,
                height: 20.w,
                fit: BoxFit.contain,
              )
              : Container(
                width: 20.w,
                height: 20.w,
                decoration: ShapeDecoration(
                  color: Colors.white,
                  shape: OvalBorder(
                    side: BorderSide(
                      width: 2.w,
                      color: const Color(0xFFE6E6E6),
                    ),
                  ),
                ),
              ),
        ],
      ),
    );
  }

  _buildSelectedDesc() {
    return Obx(() {
      return Container(
        margin: EdgeInsets.symmetric(horizontal: 16.w),
        child: Row(
          children: [
            Text(
              controller.selectedGoodsInfoItem?.selectDesc ?? "",
              style: TextStyle(
                color: Colors.black.withAlpha(102),
                fontSize: 12.sp,
                fontWeight: FontWeight.w400,
              ),
            ),
          ],
        ),
      );
    });
  }

  Widget _buildMemberCard() {
    return Container(
      margin: EdgeInsets.symmetric(horizontal: 16.w),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Assets.images.iconNewDiscountMembershipCardTitle.image(
            width: 79.w,
            height: 24.w,
          ),
          SizedBox(height: 6.w),
          Text(
            StringName.newDiscountMemberCardDesc,
            style: TextStyle(
              color: Colors.black.withValues(alpha: 87),
              fontSize: 11.sp,
              fontWeight: FontWeight.w400,
            ),
          ),
          SizedBox(height: 8.w),
          _buildMemberCardItem(),
        ],
      ),
    );
  }

  // 卡片权益
  _buildMemberCardItem() {
    return SizedBox(
      height: 80.w,
      child: AutoScrollListView(
        scrollDirection: Axis.horizontal,
        itemBuilder: (context, index) {
          final item = controller.memberCardList[index];
          return Container(
            margin: EdgeInsets.only(right: 8.w),
            width: 140.w,
            height: 65.w,
            decoration: ShapeDecoration(
              gradient: item.gradient,
              shape: RoundedRectangleBorder(
                side: BorderSide(width: 1.w, color: Colors.black.withAlpha(8)),
                borderRadius: BorderRadius.circular(20.r),
              ),
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                item.imageUrl.image(width: 28.w, height: 27.62.w),
                SizedBox(width: 8.w),
                Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Text(
                      item.title,
                      style: TextStyle(
                        color: Colors.black.withAlpha(204),
                        fontSize: 12.sp,
                        fontWeight: FontWeight.w700,
                      ),
                    ),
                    SizedBox(height: 6.w),
                    Text(
                      item.desc,
                      style: TextStyle(
                        color: Colors.black.withAlpha(128),
                        fontSize: 10.sp,
                        fontWeight: FontWeight.w400,
                      ),
                    ),
                  ],
                ),
              ],
            ),
          );
        },
        itemCount: controller.memberCardList.length,
      ),
    );
  }

  Widget _buildPrivacyTextSpan() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Obx(() {
          return GestureDetector(
            behavior: HitTestBehavior.opaque,
            onTap: () {
              controller.isAgree.value = !controller.isAgree.value;
            },
            child:
                controller.isAgree.value
                    ? Assets.images.iconStoreAgreePrivacy.image(
                      width: 16.w,
                      height: 16.w,
                    )
                    : SizedBox(
                      child: Container(
                        padding: EdgeInsets.all(1.w),
                        width: 16.w,
                        height: 16.w,
                        child: Container(
                          decoration: BoxDecoration(
                            shape: BoxShape.circle,
                            border: Border.all(
                              color: Colors.black.withAlpha(153),
                              width: 1.w,
                            ),
                          ),
                        ),
                      ),
                    ),
          );
        }),
        Text.rich(
          TextSpan(
            children: [
              TextSpan(
                text: StringName.textSpanIHaveReadAndAgree,
                style: TextStyle(
                  color: Colors.black.withAlpha(153),
                  fontSize: 10.sp,
                  fontWeight: FontWeight.w400,
                ),
              ),
              ClickTextSpan(
                text: StringName.textSpanPrivacyPolicy,
                url: WebUrl.privacyPolicy,
              ),

              TextSpan(
                text: StringName.textSpanAnd,
                style: TextStyle(
                  color: Colors.black.withAlpha(153),
                  fontSize: 10.sp,
                  fontWeight: FontWeight.w400,
                ),
              ),

              ClickTextSpan(
                text: StringName.textSpanServiceTerms,
                url: WebUrl.serviceAgreement,
              ),
            ],
          ),
        ),
      ],
    );
  }
}