import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

const Color scHomeShellBackgroundColor = Color(0xFF051711);
const Color scHomeShellAccentColor = Color(0xFF18F2B1);
const Color scHomeShellGoldColor = Color(0xFFE9B455);
const LinearGradient scHomeShellGoldTextGradient = LinearGradient(
  begin: Alignment.topCenter,
  end: Alignment.bottomCenter,
  colors: [Color(0xFFFCFBD9), Color(0xFFDC9D3A)],
);
const String scHomeShellBackgroundAsset =
    'sc_images/index/sc_home_shell_bg.png';

class SCHomeShellBackground extends StatelessWidget {
  const SCHomeShellBackground({super.key});

  @override
  Widget build(BuildContext context) {
    return DecoratedBox(
      decoration: const BoxDecoration(color: scHomeShellBackgroundColor),
      child: Image.asset(
        scHomeShellBackgroundAsset,
        width: double.infinity,
        height: double.infinity,
        fit: BoxFit.cover,
        alignment: Alignment.topCenter,
        errorBuilder:
            (context, error, stackTrace) =>
                const ColoredBox(color: scHomeShellBackgroundColor),
      ),
    );
  }
}

class SCHomeShellGradientText extends StatelessWidget {
  const SCHomeShellGradientText(
    this.text, {
    super.key,
    required this.style,
    this.maxLines,
    this.overflow,
    this.textAlign,
  });

  final String text;
  final TextStyle style;
  final int? maxLines;
  final TextOverflow? overflow;
  final TextAlign? textAlign;

  @override
  Widget build(BuildContext context) {
    final gradientText = ShaderMask(
      blendMode: BlendMode.srcIn,
      shaderCallback: scHomeShellGoldTextGradient.createShader,
      child: _buildText(style.copyWith(color: Colors.white, shadows: null)),
    );
    if (style.shadows == null || style.shadows!.isEmpty) {
      return gradientText;
    }
    return Stack(
      clipBehavior: Clip.none,
      children: [
        ExcludeSemantics(
          child: _buildText(style.copyWith(color: Colors.transparent)),
        ),
        gradientText,
      ],
    );
  }

  Widget _buildText(TextStyle textStyle) {
    return Text(
      text,
      maxLines: maxLines,
      overflow: overflow,
      textAlign: textAlign,
      style: textStyle,
    );
  }
}

TextStyle scHomeShellTitleStyle({double? fontSize}) {
  return TextStyle(
    color: scHomeShellGoldColor,
    fontSize: (fontSize ?? 28).sp,
    fontWeight: FontWeight.w900,
    fontStyle: FontStyle.italic,
    shadows: const [
      Shadow(color: Color(0xB3000000), offset: Offset(0, 1), blurRadius: 1),
    ],
  );
}