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

import '../../../../core/theme/design_tokens.dart';

const homeFloatingHeaderKey = ValueKey('home_floating_header');
const homeFloatingHeaderTitleKey = ValueKey('home_floating_header_title');

class HomeFloatingHeader extends StatelessWidget {
  const HomeFloatingHeader({
    super.key,
    required this.unreadCount,
    required this.onTapSettings,
    required this.onTapCalendar,
    required this.onTapMessages,
  });

  final int unreadCount;
  final VoidCallback onTapSettings;
  final VoidCallback onTapCalendar;
  final VoidCallback onTapMessages;

  @override
  Widget build(BuildContext context) {
    return Container(
      key: homeFloatingHeaderKey,
      padding: const EdgeInsets.fromLTRB(
        AppSpacing.lg,
        AppSpacing.xs,
        AppSpacing.lg,
        AppSpacing.xs,
      ),
      decoration: const BoxDecoration(
        color: AppColors.homeToolbarSurface,
        border: Border(bottom: BorderSide(color: AppColors.homeToolbarBorder)),
      ),
      child: Stack(
        alignment: Alignment.center,
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              _HeaderIconButton(
                icon: LucideIcons.settings,
                onPressed: onTapSettings,
              ),
              Row(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  _HeaderIconButton(
                    icon: LucideIcons.calendar,
                    onPressed: onTapCalendar,
                  ),
                  const SizedBox(width: AppSpacing.sm),
                  _MessagesButton(
                    unreadCount: unreadCount,
                    onPressed: onTapMessages,
                  ),
                ],
              ),
            ],
          ),
          const IgnorePointer(
            child: Padding(
              padding: EdgeInsets.symmetric(horizontal: AppSpacing.xl * 3),
              child: Text(
                'Linksy',
                key: homeFloatingHeaderTitleKey,
                maxLines: 1,
                overflow: TextOverflow.ellipsis,
                style: TextStyle(
                  fontSize: AppSpacing.lg + (AppSpacing.xs / 2),
                  fontWeight: FontWeight.w600,
                  color: AppColors.slate800,
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class _HeaderIconButton extends StatelessWidget {
  const _HeaderIconButton({required this.icon, required this.onPressed});

  final IconData icon;
  final VoidCallback onPressed;

  @override
  Widget build(BuildContext context) {
    return IconButton(
      visualDensity: VisualDensity.compact,
      padding: const EdgeInsets.all(AppSpacing.xs),
      constraints: const BoxConstraints(
        minWidth: AppSpacing.xxl + AppSpacing.lg,
        minHeight: AppSpacing.xxl + AppSpacing.lg,
      ),
      onPressed: onPressed,
      icon: Icon(icon, size: AppSpacing.xxl, color: AppColors.slate900),
    );
  }
}

class _MessagesButton extends StatelessWidget {
  const _MessagesButton({required this.unreadCount, required this.onPressed});

  final int unreadCount;
  final VoidCallback onPressed;

  @override
  Widget build(BuildContext context) {
    return IconButton(
      visualDensity: VisualDensity.compact,
      padding: const EdgeInsets.all(AppSpacing.xs),
      constraints: const BoxConstraints(
        minWidth: AppSpacing.xxl + AppSpacing.lg,
        minHeight: AppSpacing.xxl + AppSpacing.lg,
      ),
      onPressed: onPressed,
      icon: Stack(
        clipBehavior: Clip.none,
        children: [
          const Icon(
            LucideIcons.messageSquare,
            size: AppSpacing.xxl,
            color: AppColors.slate900,
          ),
          if (unreadCount > 0)
            Positioned(
              right: -AppSpacing.xs,
              top: -AppSpacing.xs,
              child: Container(
                padding: const EdgeInsets.symmetric(
                  horizontal: AppSpacing.xs,
                  vertical: AppSpacing.xs / 2,
                ),
                decoration: BoxDecoration(
                  color: AppColors.red500,
                  borderRadius: BorderRadius.circular(AppSpacing.sm),
                ),
                constraints: const BoxConstraints(
                  minWidth: AppSpacing.lg,
                  minHeight: AppSpacing.lg,
                ),
                child: Text(
                  unreadCount > 99 ? '99+' : unreadCount.toString(),
                  textAlign: TextAlign.center,
                  style: const TextStyle(
                    fontSize: AppSpacing.sm + (AppSpacing.xs / 2),
                    fontWeight: FontWeight.w600,
                    color: AppColors.white,
                  ),
                ),
              ),
            ),
        ],
      ),
    );
  }
}