import 'package:auto_size_text/auto_size_text.dart';
import 'package:design/design.dart';
import 'package:guru_app/financial/iap/iap_model.dart';
import 'package:guru_ui/guru_widget.dart';
import 'package:guru_ui/localizations/ui_strings.dart';
import 'package:guru_ui/pages/store/store_design_spec.dart';
import 'package:guru_ui/pages/store/store_page.dart';
import 'package:guru_widgets/common/flexible_container.dart';
import 'package:guru_widgets/common/spacer.dart';
import 'package:guru_widgets/theme/guru_theme.dart';
import 'package:guru_ui/localizations/l10n/generated/app_localizations.dart';

part 'purchase_card.g.dart';

@DesignSpec(width: 210, height: 320, specMode: SpecMode.useSize)
abstract class PurchaseCardDesignSpec implements BasicDesignSpec {
  @SpecRadius.circular(SpecHeight(24))
  BorderRadius get cardRadius;

  @SpecRadius.circular(SpecHeight(12))
  BorderRadius get exhibitionRadius;

  @SpecRect.fromLTRB(SpecHorizontal(12), SpecVertical(13), SpecHorizontal(12),
      SpecVertical(106))
  Rect get exhibitionPositionedRect;

  @SpecEdgeInsets.only(
      start: SpecHorizontal(12),
      end: SpecHorizontal(12),
      top: SpecVertical(22),
      bottom: SpecVertical(2))
  EdgeInsets get extraBonusPadding;

  @SpecFontSize(18)
  double get bonusFontSize;

  @SpecAbsoluteFontSize(36)
  double get quantityFontSize;

  @SpecEdgeInsets.symmetric(horizontal: SpecHorizontal(12))
  EdgeInsets get quantityPadding;

  @SpecHeight(4)
  double get quantityUnitSpacing;

  @SpecHeight(34)
  double get quantityUnitSize;

  @SpecSize(SpecWidth(144), SpecHeight(112))
  Size get illustrationSize;

  @SpecEdgeInsets.only(top: SpecVertical(18), bottom: SpecVertical(12))
  EdgeInsets get illustrationPadding;

  @SpecHeight(12)
  double get purchaseButtonTopSpacing;

  @SpecAspectHeightSize(60, 2.83333333)
  Size get purchaseButtonSize;

  @SpecHeight(92, consistent: true)
  double get labelSize;

  @SpecHeight(88, consistent: true)
  double get labelTopSpacing;

  @SpecWidth(6)
  double get labalEndSpacing;

  static PurchaseCardDesignSpec from(Size size,
          {Offset offset = Offset.zero}) =>
      _PurchaseCardDesignSpec.from(size, offset: offset);
}

class PurchaseCardStyle {
  final String name;

  const PurchaseCardStyle.create(this.name);

  // 游戏内货币的资源条
  static const PurchaseCardStyle igc = PurchaseCardStyle.create("_igc");
}

class PurchaseCardStyleTheme {
  // 额外Bonus的颜色，如果不提供将填充黑色
  final Color? extraBonusColor;

  // 数量的颜色，如果不提供将填充黑色
  final Color? quantityColor;

  // 数量前缀的单位icon, 如果不提供将不显示
  final QuantityPrefix? quantityPrefix;

  // 数量前前缀的单位icon, 如果不提供将不显示
  final String? quantityUnit;

  // 是否使用千分位分隔符
  final bool? useThousandsSeparator;

  // 展览区域的渐变背景，如果不提供将不显示
  final Gradient? exhibitionGradient;

  // 卡片组中各个卡版的默认背景色，如果不提供将会使用GuruTheme中的containerColor替代
  final Color? backgroundColor;

  // PurchaseButton的样式
  final GuruButtonStyle? purchaseButtonStyle;

  PurchaseCardStyleTheme({
    this.extraBonusColor,
    this.quantityColor,
    this.quantityPrefix,
    this.quantityUnit,
    this.exhibitionGradient,
    this.backgroundColor,
    this.useThousandsSeparator = true,
    this.purchaseButtonStyle,
  });
}

class PurchaseCardModel {
  final IapProduct? product;
  final CardItem cardItem;
  final PurchaseCardStyleTheme styleTheme;
  final PurchaseCardDesignSpec designSpec;
  final VoidCallback onTap;

  PurchaseCardModel(
      {required this.product,
      required this.cardItem,
      required this.styleTheme,
      required this.designSpec,
      required this.onTap});
}

class PurchaseCard extends StatelessWidget {
  final PurchaseCardModel model;

  IapProduct? get product => model.product;

  CardItem get cardItem => model.cardItem;

  PurchaseCardStyleTheme get styleTheme => model.styleTheme;

  PurchaseCardDesignSpec get designSpec => model.designSpec;

  const PurchaseCard({Key? key, required this.model}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final extraBonus = cardItem.extraBonus ?? 0;
    final uiStrings = UIStrings.get();

    return FlexibleContainer(
        width: designSpec.measuredSize.width,
        height: designSpec.measuredSize.height,
        radius: designSpec.cardRadius,
        color: styleTheme.backgroundColor,
        child: Stack(fit: StackFit.expand, children: [
          Positioned(
              left: designSpec.exhibitionPositionedRect.left,
              right: designSpec.exhibitionPositionedRect.right,
              top: designSpec.exhibitionPositionedRect.top,
              bottom: designSpec.exhibitionPositionedRect.bottom,
              child: DecoratedBox(
                  decoration: BoxDecoration(
                      borderRadius: designSpec.exhibitionRadius,
                      gradient: styleTheme.exhibitionGradient))),
          Column(crossAxisAlignment: CrossAxisAlignment.center, children: [
            Padding(
                padding: designSpec.extraBonusPadding,
                child: Text(
                  extraBonus > 0
                      ? "${(extraBonus * 100).toInt()}% ${uiStrings.bonus}"
                      : " ",
                  style: TextStyle(
                      fontSize: designSpec.bonusFontSize,
                      fontWeight: GuruTheme.fwSemiBold,
                      color: styleTheme.extraBonusColor ??
                          const Color(0xFFFF2830)),
                )),
            Padding(
              padding: designSpec.quantityPadding,
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  if (styleTheme.quantityUnit != null) ...[
                    Image.asset(styleTheme.quantityUnit!,
                        width: designSpec.quantityUnitSize,
                        height: designSpec.quantityUnitSize),
                    SizedSpacer(width: designSpec.quantityUnitSpacing)
                  ],
                  AutoSizeText(
                    cardItem.quantity.toString(),
                    minFontSize: 5,
                    style: TextStyle(
                        fontSize: designSpec.quantityFontSize,
                        fontWeight: GuruTheme.fwBold,
                        color: styleTheme.quantityColor),
                  )
                ],
              ),
            ),
            Padding(
              padding: designSpec.illustrationPadding,
              child: AdaptiveImage(
                cardItem.illustration,
                width: designSpec.illustrationSize.width,
                height: designSpec.illustrationSize.height,
                fit: BoxFit.cover
              ),
            ),
            GuruButton(
              size: designSpec.purchaseButtonSize,
              sizeSpec: GuruButtonSizeSpec.s5,
              style: GuruButtonStyle.purchase,
              action: product != null ? product!.details.price : '1000000000',
              onPressed: () {
                model.onTap.call();
              },
            )
          ]),
          if (cardItem.label != null)
            Positioned.directional(textDirection: Directionality.of(context), 
            top: designSpec.labelTopSpacing,
            end: designSpec.labalEndSpacing,
            child: AdaptiveImage(
              cardItem.label!,
              width: designSpec.labelSize,
              height: designSpec.labelSize,
            ))
        ]));
  }
}