import 'package:flutter/material.dart';

import 'package:asciineverdie/src/shared/retro_colors.dart';
import 'package:asciineverdie/src/shared/widgets/pixel_border_painter.dart';

/// 레트로 RPG 스타일 패널
/// 8-bit 게임의 UI 프레임 느낌을 재현
class RetroPanel extends StatelessWidget {
  const RetroPanel({
    super.key,
    required this.child,
    this.padding = const EdgeInsets.all(12),
    this.backgroundColor = RetroColors.panelBg,
    this.borderWidth = 3.0,
    this.useGoldBorder = false,
    this.title,
    this.titleWidget,
  }) : assert(
         title == null || titleWidget == null,
         'title과 titleWidget 중 하나만 사용 가능',
       );

  /// 패널 내부 컨텐츠
  final Widget child;

  /// 내부 패딩
  final EdgeInsets padding;

  /// 배경 색상
  final Color backgroundColor;

  /// 테두리 두께
  final double borderWidth;

  /// 골드 테두리 사용 여부 (중요한 패널에 사용)
  final bool useGoldBorder;

  /// 패널 타이틀 (상단에 표시)
  final String? title;

  /// 커스텀 타이틀 위젯 (title 대신 사용)
  final Widget? titleWidget;

  @override
  Widget build(BuildContext context) {
    final painter = useGoldBorder
        ? GoldBorderPainter(
            borderWidth: borderWidth,
            fillColor: backgroundColor,
          )
        : PixelBorderPainter(
            borderWidth: borderWidth,
            fillColor: backgroundColor,
          );

    final hasTitle = title != null || titleWidget != null;

    return CustomPaint(
      painter: painter,
      child: Padding(
        padding: EdgeInsets.all(borderWidth).add(padding),
        child: hasTitle
            ? Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                mainAxisSize: MainAxisSize.min,
                children: [
                  if (titleWidget != null)
                    _PanelTitleContainer(
                      useGoldBorder: useGoldBorder,
                      child: titleWidget!,
                    )
                  else
                    _PanelTitle(title: title!, useGoldBorder: useGoldBorder),
                  const SizedBox(height: 8),
                  Flexible(child: child),
                ],
              )
            : child,
      ),
    );
  }
}

/// 패널 타이틀 위젯
class _PanelTitle extends StatelessWidget {
  const _PanelTitle({required this.title, required this.useGoldBorder});

  final String title;
  final bool useGoldBorder;

  @override
  Widget build(BuildContext context) {
    return _PanelTitleContainer(
      useGoldBorder: useGoldBorder,
      child: Text(
        title.toUpperCase(),
        style: TextStyle(
          fontFamily: 'PressStart2P',
          fontSize: 14,
          color: useGoldBorder ? RetroColors.gold : RetroColors.textLight,
          letterSpacing: 1,
        ),
      ),
    );
  }
}

/// 패널 타이틀 컨테이너 (커스텀 위젯용)
class _PanelTitleContainer extends StatelessWidget {
  const _PanelTitleContainer({
    required this.useGoldBorder,
    required this.child,
  });

  final bool useGoldBorder;
  final Widget child;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: useGoldBorder
            ? RetroColors.goldDark.withValues(alpha: 0.3)
            : RetroColors.panelBorderOuter.withValues(alpha: 0.5),
        border: Border(
          bottom: BorderSide(
            color: useGoldBorder
                ? RetroColors.gold
                : RetroColors.panelBorderInner,
            width: 1,
          ),
        ),
      ),
      child: child,
    );
  }
}

/// 골드 테두리 레트로 패널 (중요한 컨텐츠용)
class RetroGoldPanel extends StatelessWidget {
  const RetroGoldPanel({
    super.key,
    required this.child,
    this.padding = const EdgeInsets.all(12),
    this.title,
    this.titleWidget,
  }) : assert(
         title == null || titleWidget == null,
         'title과 titleWidget 중 하나만 사용 가능',
       );

  final Widget child;
  final EdgeInsets padding;
  final String? title;
  final Widget? titleWidget;

  @override
  Widget build(BuildContext context) {
    return RetroPanel(
      useGoldBorder: true,
      padding: padding,
      title: title,
      titleWidget: titleWidget,
      child: child,
    );
  }
}