// Author: fruit.com.cn

import 'package:flutter/material.dart';

import '../../../core/data/models/drama.dart';
import '../../../core/formatting/localized_content.dart';
import '../../../core/theme/app_colors.dart';
import '../../../core/widgets/remote_image.dart';
import '../../../core/widgets/subpage_header.dart';
import '../../../l10n/app_localizations.dart';

const double _horizontal = 14;
const double _topGap = 8;
const double _posterWidth = 96;
const double _posterHeight = 128;
const double _posterRadius = 12;
const double _infoGap = 14;
const double _favoriteHeight = 34;
const double _favoriteRadius = 17;
const double _favoriteHorizontal = 12;

/// 详情页顶部操作与短剧主信息所需的交互回调。
class DramaDetailHeaderActions {
  const DramaDetailHeaderActions({
    required this.onBack,
    required this.onShare,
    required this.onFavorite,
    required this.moreMenu,
  });

  final VoidCallback onBack;
  final VoidCallback onShare;
  final VoidCallback onFavorite;
  final Widget moreMenu;
}

/// 详情页暖色渐变头部：操作行、封面、标题、集数与收藏按钮。
class DramaDetailHeader extends StatelessWidget {
  const DramaDetailHeader({
    super.key,
    required this.l10n,
    required this.drama,
    required this.saved,
    required this.actions,
  });

  final AppLocalizations l10n;
  final Drama drama;
  final bool saved;
  final DramaDetailHeaderActions actions;

  @override
  Widget build(BuildContext context) {
    return Container(
      key: const Key('detail-hero'),
      decoration: const BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topCenter,
          end: Alignment.bottomCenter,
          colors: [AppColors.surfaceTop, AppColors.ink],
        ),
      ),
      child: SafeArea(
        bottom: false,
        child: Padding(
          padding: const EdgeInsets.fromLTRB(_horizontal, 8, _horizontal, 10),
          child: Column(
            children: [
              _actions(context),
              const SizedBox(height: _topGap),
              _identity(context),
            ],
          ),
        ),
      ),
    );
  }

  Widget _actions(BuildContext context) {
    return Row(
      children: [
        AppSubpageBackButton(
          backKey: const Key('detail-back'),
          dark: true,
          onBack: actions.onBack,
        ),
        const Spacer(),
        AppSubpageCircleButton(
          buttonKey: const Key('detail-share'),
          tooltip: l10n.share,
          icon: Icons.share_outlined,
          dark: true,
          onPressed: actions.onShare,
        ),
        const SizedBox(width: 8),
        actions.moreMenu,
      ],
    );
  }

  Widget _identity(BuildContext context) {
    return Row(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Container(
          key: const Key('detail-poster'),
          width: _posterWidth,
          height: _posterHeight,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(_posterRadius),
            boxShadow: const [
              BoxShadow(
                color: AppColors.cardShadow,
                blurRadius: 16,
                offset: Offset(0, 5),
              ),
            ],
          ),
          child: ClipRRect(
            borderRadius: BorderRadius.circular(_posterRadius),
            child: RemoteImage(
              drama.posterUrl,
              fit: BoxFit.cover,
              showFallbackIcon: true,
              fallbackAspectRatio: 3 / 4,
            ),
          ),
        ),
        const SizedBox(width: _infoGap),
        Expanded(
          child: SizedBox(
            height: _posterHeight,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  localizedDramaTitle(l10n, drama),
                  key: const Key('detail-title'),
                  maxLines: 2,
                  overflow: TextOverflow.ellipsis,
                  style: const TextStyle(
                    color: AppColors.onSurface,
                    fontSize: 20,
                    fontWeight: FontWeight.w800,
                    height: 1.2,
                  ),
                ),
                const SizedBox(height: 6),
                Text(
                  l10n.episodeCountLabel(drama.episodeCount),
                  key: const Key('detail-episode-count'),
                  style: const TextStyle(
                    color: AppColors.muted,
                    fontSize: 12,
                    fontWeight: FontWeight.w500,
                  ),
                ),
                const Spacer(),
                _favoriteButton(),
              ],
            ),
          ),
        ),
      ],
    );
  }

  Widget _favoriteButton() {
    return GestureDetector(
      onTap: actions.onFavorite,
      child: Container(
        key: const Key('detail-favorite'),
        height: _favoriteHeight,
        padding: const EdgeInsets.symmetric(horizontal: _favoriteHorizontal),
        decoration: BoxDecoration(
          color: saved ? AppColors.blue : AppColors.card,
          borderRadius: BorderRadius.circular(_favoriteRadius),
          border: Border.all(color: saved ? AppColors.blue : AppColors.blue),
        ),
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(
              saved ? Icons.star_rounded : Icons.star_border_rounded,
              size: 16,
              color: saved ? AppColors.onPrimary : AppColors.blue,
            ),
            const SizedBox(width: 4),
            Text(
              l10n.favorite,
              style: TextStyle(
                color: saved ? AppColors.onPrimary : AppColors.blue,
                fontSize: 12,
                fontWeight: FontWeight.w700,
              ),
            ),
          ],
        ),
      ),
    );
  }
}