import 'package:flutter/material.dart';

import '../../../app/app_theme.dart';
import '../../../l10n/l10n.dart';
import '../../../models/today_progress.dart';
import '../../../widgets/app_motion.dart';

class DailyProgressRail extends StatelessWidget {
  const DailyProgressRail({required this.progress, super.key});

  final TodayProgress progress;

  @override
  Widget build(BuildContext context) {
    final l10n = context.l10n;
    final items = [
      _ProgressItem(
        label: l10n.progressIntention,
        detail: progress.hasIntention ? l10n.done : l10n.next,
        icon: Icons.flag_outlined,
        complete: progress.hasIntention,
      ),
      _ProgressItem(
        label: l10n.progressFocus,
        detail:
            progress.hasFocus
                ? l10n.minutesShort(progress.focusMinutes)
                : l10n.next,
        icon: Icons.timer_outlined,
        complete: progress.hasFocus,
      ),
      _ProgressItem(
        label: l10n.progressReflect,
        detail: progress.hasReflection ? l10n.done : l10n.later,
        icon: Icons.edit_note_rounded,
        complete: progress.hasReflection,
      ),
    ];
    final textScale = MediaQuery.textScalerOf(context).scale(12) / 12;
    return LayoutBuilder(
      builder: (context, constraints) {
        if (constraints.maxWidth < 320 || textScale > 1.35) {
          return _VerticalProgress(items: items);
        }
        return _HorizontalProgress(items: items);
      },
    );
  }
}

class _HorizontalProgress extends StatelessWidget {
  const _HorizontalProgress({required this.items});

  final List<_ProgressItem> items;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final scheme = theme.colorScheme;
    final visuals = FocusSeedVisuals.of(context);
    final lastCompleteIndex = items.lastIndexWhere((item) => item.complete);
    final progress =
        lastCompleteIndex <= 0 ? 0.0 : lastCompleteIndex / (items.length - 1);
    return Semantics(
      label: context.l10n.dailyStepsComplete(
        items.where((item) => item.complete).length,
      ),
      child: Column(
        children: [
          SizedBox(
            height: 32,
            child: LayoutBuilder(
              builder: (context, constraints) {
                final inset = constraints.maxWidth / (items.length * 2);
                return Stack(
                  alignment: Alignment.center,
                  children: [
                    Positioned(
                      left: inset,
                      right: inset,
                      top: 15,
                      child: _ProgressTrack(
                        color: scheme.outlineVariant.withValues(alpha: 0.72),
                      ),
                    ),
                    Positioned(
                      left: inset,
                      right: inset,
                      top: 15,
                      child: Align(
                        alignment: Alignment.centerLeft,
                        child: FractionallySizedBox(
                          widthFactor: progress.clamp(0.0, 1.0),
                          child: _ProgressTrack(
                            color: visuals.success,
                            glow: visuals.success.withValues(alpha: 0.20),
                          ),
                        ),
                      ),
                    ),
                    Positioned.fill(
                      child: Row(
                        children: [
                          for (final item in items)
                            Expanded(
                              child: Center(child: _ProgressDot(item: item)),
                            ),
                        ],
                      ),
                    ),
                  ],
                );
              },
            ),
          ),
          const SizedBox(height: 6),
          Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              for (final item in items)
                Expanded(
                  child: Column(
                    children: [
                      Text(
                        item.label,
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: theme.textTheme.labelSmall?.copyWith(
                          fontWeight: FontWeight.w800,
                        ),
                      ),
                      const SizedBox(height: 1),
                      Text(
                        item.detail,
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: theme.textTheme.labelSmall?.copyWith(
                          color: scheme.onSurfaceVariant,
                          fontSize: 10.5,
                        ),
                      ),
                    ],
                  ),
                ),
            ],
          ),
        ],
      ),
    );
  }
}

class _VerticalProgress extends StatelessWidget {
  const _VerticalProgress({required this.items});

  final List<_ProgressItem> items;

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        for (var index = 0; index < items.length; index++) ...[
          Row(
            children: [
              _ProgressDot(item: items[index]),
              const SizedBox(width: 10),
              Expanded(
                child: Text(
                  items[index].label,
                  style: Theme.of(context).textTheme.labelLarge,
                ),
              ),
              Text(items[index].detail),
            ],
          ),
          if (index < items.length - 1) const SizedBox(height: 10),
        ],
      ],
    );
  }
}

class _ProgressTrack extends StatelessWidget {
  const _ProgressTrack({required this.color, this.glow});

  final Color color;
  final Color? glow;

  @override
  Widget build(BuildContext context) {
    return AnimatedContainer(
      duration: AppMotion.duration(context, AppMotion.medium),
      curve: AppMotion.emphasized,
      height: 2,
      decoration: BoxDecoration(
        color: color,
        borderRadius: BorderRadius.circular(99),
        boxShadow:
            glow == null ? null : [BoxShadow(color: glow!, blurRadius: 10)],
      ),
    );
  }
}

class _ProgressDot extends StatelessWidget {
  const _ProgressDot({required this.item});

  final _ProgressItem item;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final scheme = theme.colorScheme;
    final visuals = FocusSeedVisuals.of(context);
    return AnimatedScale(
      scale: item.complete ? 1.08 : 1,
      duration: AppMotion.duration(context, AppMotion.fast),
      curve: AppMotion.settle,
      child: AnimatedContainer(
        duration: AppMotion.duration(context, AppMotion.medium),
        curve: AppMotion.emphasized,
        width: 28,
        height: 28,
        decoration: BoxDecoration(
          shape: BoxShape.circle,
          color: item.complete ? visuals.success : scheme.surfaceContainerLow,
          border: Border.all(
            color: item.complete ? visuals.success : scheme.outlineVariant,
          ),
          boxShadow:
              item.complete
                  ? [
                    BoxShadow(
                      color: visuals.success.withValues(alpha: 0.20),
                      blurRadius: 8,
                      offset: const Offset(0, 3),
                    ),
                  ]
                  : null,
        ),
        child: AnimatedSwitcher(
          duration: AppMotion.duration(context, AppMotion.fast),
          switchInCurve: AppMotion.settle,
          switchOutCurve: Curves.easeInCubic,
          transitionBuilder: (child, animation) {
            return FadeTransition(
              opacity: animation,
              child: ScaleTransition(scale: animation, child: child),
            );
          },
          child: Icon(
            item.complete ? Icons.check_rounded : item.icon,
            key: ValueKey('${item.label}-${item.complete}'),
            size: 15,
            color: item.complete ? scheme.onPrimary : scheme.onSurfaceVariant,
          ),
        ),
      ),
    );
  }
}

class _ProgressItem {
  const _ProgressItem({
    required this.label,
    required this.detail,
    required this.icon,
    required this.complete,
  });

  final String label;
  final String detail;
  final IconData icon;
  final bool complete;
}