import 'package:flutter/material.dart';

import '../../../l10n/l10n.dart';
import '../../../models/today_progress.dart';
import '../../../widgets/seed_illustration.dart';
import '../../../widgets/surface_panel.dart';

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

  final TodayProgress progress;
  final VoidCallback onReflect;

  @override
  Widget build(BuildContext context) {
    final l10n = context.l10n;
    final scheme = Theme.of(context).colorScheme;
    final completed = progress.completedSteps;
    final progressValue = completed / 4;
    final title = switch (completed) {
      0 => l10n.journeyOverviewStartTitle,
      4 => l10n.journeyOverviewDoneTitle,
      _ => l10n.journeyOverviewActiveTitle,
    };
    final subtitle = switch (completed) {
      0 => l10n.journeyOverviewStartBody,
      4 => l10n.journeyOverviewDoneBody,
      _ => l10n.journeyOverviewActiveBody,
    };
    final showReflectAction =
        progress.hasIntention && progress.hasFocus && !progress.hasReflection;

    return SurfacePanel(
      elevated: true,
      padding: EdgeInsets.zero,
      borderColor: scheme.outlineVariant.withValues(alpha: 0.45),
      child: Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
            colors: [
              scheme.primary.withValues(alpha: 0.20),
              scheme.surfaceContainerLowest.withValues(alpha: 0.96),
              scheme.secondary.withValues(alpha: 0.14),
            ],
          ),
        ),
        child: LayoutBuilder(
          builder: (context, constraints) {
            final textScale = MediaQuery.textScalerOf(context).scale(14) / 14;
            final compact = constraints.maxWidth < 360 || textScale > 1.25;
            final textContent = _OverviewText(
              title: title,
              subtitle: subtitle,
              completed: completed,
              progressValue: progressValue,
              showReflectAction: showReflectAction,
              onReflect: onReflect,
            );
            if (compact) {
              return Stack(
                children: [
                  const Positioned(
                    right: -18,
                    top: -20,
                    child: Opacity(
                      opacity: 0.58,
                      child: SeedIllustration(size: 128, hero: true),
                    ),
                  ),
                  Padding(
                    padding: const EdgeInsets.fromLTRB(16, 17, 106, 18),
                    child: textContent,
                  ),
                ],
              );
            }
            return Stack(
              children: [
                Positioned(
                  right: -28,
                  top: -22,
                  bottom: -18,
                  child: Opacity(
                    opacity: 0.96,
                    child: SeedIllustration(
                      size: constraints.maxWidth.clamp(146, 184).toDouble(),
                      hero: true,
                    ),
                  ),
                ),
                Positioned(
                  right: 92,
                  bottom: 18,
                  child: _ProgressBadge(completed: completed),
                ),
                Padding(
                  padding: const EdgeInsets.fromLTRB(18, 17, 168, 18),
                  child: textContent,
                ),
              ],
            );
          },
        ),
      ),
    );
  }
}

class _OverviewText extends StatelessWidget {
  const _OverviewText({
    required this.title,
    required this.subtitle,
    required this.completed,
    required this.progressValue,
    required this.showReflectAction,
    required this.onReflect,
  });

  final String title;
  final String subtitle;
  final int completed;
  final double progressValue;
  final bool showReflectAction;
  final VoidCallback onReflect;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final l10n = context.l10n;
    final scheme = theme.colorScheme;
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          l10n.journeyOverviewLabel,
          style: theme.textTheme.labelSmall?.copyWith(
            color: scheme.primary,
            fontWeight: FontWeight.w800,
          ),
        ),
        const SizedBox(height: 6),
        Text(
          title,
          maxLines: 2,
          overflow: TextOverflow.ellipsis,
          style: theme.textTheme.titleLarge?.copyWith(
            fontWeight: FontWeight.w900,
          ),
        ),
        const SizedBox(height: 6),
        Text(
          subtitle,
          maxLines: 2,
          overflow: TextOverflow.ellipsis,
          style: theme.textTheme.bodyMedium?.copyWith(
            color: scheme.onSurfaceVariant,
          ),
        ),
        const SizedBox(height: 16),
        _ProgressSeeds(completed: completed, progressValue: progressValue),
        const SizedBox(height: 12),
        Row(
          children: [
            Expanded(
              child: Text(
                l10n.journeyOverviewProgress(completed),
                maxLines: 1,
                overflow: TextOverflow.ellipsis,
                style: theme.textTheme.labelLarge,
              ),
            ),
            if (showReflectAction)
              TextButton.icon(
                onPressed: onReflect,
                icon: const Icon(Icons.edit_note_rounded, size: 18),
                label: Text(l10n.reviewNow),
              ),
          ],
        ),
      ],
    );
  }
}

class _ProgressSeeds extends StatelessWidget {
  const _ProgressSeeds({required this.completed, required this.progressValue});

  final int completed;
  final double progressValue;

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    return Semantics(
      value: '${(progressValue * 100).round()}%',
      child: Row(
        children: List.generate(4, (index) {
          final filled = index < completed;
          return Expanded(
            child: AnimatedContainer(
              duration: const Duration(milliseconds: 220),
              curve: Curves.easeOutCubic,
              height: 10,
              margin: EdgeInsets.only(right: index == 3 ? 0 : 7),
              decoration: BoxDecoration(
                color:
                    filled
                        ? scheme.primary
                        : scheme.surfaceContainerHigh.withValues(alpha: 0.82),
                borderRadius: BorderRadius.circular(99),
                boxShadow:
                    filled
                        ? [
                          BoxShadow(
                            color: scheme.primary.withValues(alpha: 0.28),
                            blurRadius: 10,
                            offset: const Offset(0, 4),
                          ),
                        ]
                        : null,
              ),
            ),
          );
        }),
      ),
    );
  }
}

class _ProgressBadge extends StatelessWidget {
  const _ProgressBadge({required this.completed});

  final int completed;

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final theme = Theme.of(context);
    return DecoratedBox(
      decoration: BoxDecoration(
        color: scheme.surfaceContainerLowest.withValues(alpha: 0.82),
        borderRadius: BorderRadius.circular(99),
        border: Border.all(
          color: scheme.outlineVariant.withValues(alpha: 0.65),
        ),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: 0.10),
            blurRadius: 14,
            offset: const Offset(0, 7),
          ),
        ],
      ),
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 11, vertical: 7),
        child: Text(
          '$completed/4',
          style: theme.textTheme.labelLarge?.copyWith(
            color: scheme.primary,
            fontWeight: FontWeight.w900,
          ),
        ),
      ),
    );
  }
}