import 'package:flutter/material.dart';
import '../l10n/app_localizations.dart';
import '../theme/app_colors.dart';
import '../theme/app_text_styles.dart';
import '../services/storage_service.dart';
import '../services/encouragement_service.dart';
import '../models/achievement_config.dart';
import 'home_screen.dart';
import 'history_screen.dart';

/// Complete Screen - Shows after focus session ends
class CompleteScreen extends StatelessWidget {
  final int focusedMinutes;
  final int distractionCount;
  final int pointsEarned;
  final int basePoints;
  final int honestyBonus;
  final int totalPoints;
  final List<String> newAchievements;
  final EncouragementService encouragementService;

  const CompleteScreen({
    super.key,
    required this.focusedMinutes,
    required this.distractionCount,
    required this.pointsEarned,
    required this.basePoints,
    required this.honestyBonus,
    required this.totalPoints,
    this.newAchievements = const [],
    required this.encouragementService,
  });

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final storageService = StorageService();
    final todayTotal = storageService.getTodayTotalMinutes();
    final todayDistractions = storageService.getTodayDistractionCount();
    final encouragement = encouragementService.getRandomMessage();

    return Scaffold(
      backgroundColor: AppColors.background,
      body: SafeArea(
        child: Padding(
          padding: const EdgeInsets.all(24.0),
          child: SingleChildScrollView(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                const SizedBox(height: 40),

                // You focused for X minutes with success icon - left-right layout
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  crossAxisAlignment: CrossAxisAlignment.center,
                  children: [
                    // Star icon on the left
                    const Text('✨', style: TextStyle(fontSize: 64)),
                    const SizedBox(width: 20),
                    // Text content on the right
                    Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(l10n.youFocusedFor, style: AppTextStyles.headline),
                        const SizedBox(height: 8),
                        Text(
                          l10n.minutesValue(
                            focusedMinutes,
                            l10n.minutes(focusedMinutes),
                          ),
                          style: AppTextStyles.largeNumber,
                        ),
                      ],
                    ),
                  ],
                ),

                const SizedBox(height: 32),

                // Points Earned Section
                _buildPointsCard(context, l10n),

                const SizedBox(height: 16),

                // Achievement Unlocked (if any)
                if (newAchievements.isNotEmpty)
                  ..._buildAchievementCards(context, l10n),

                const SizedBox(height: 16),

                // Stats Card
                Container(
                  width: double.infinity,
                  padding: const EdgeInsets.all(24),
                  decoration: BoxDecoration(
                    color: AppColors.white,
                    borderRadius: BorderRadius.circular(16),
                  ),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        l10n.totalToday(todayTotal),
                        style: AppTextStyles.bodyText,
                      ),
                      const SizedBox(height: 12),
                      Text(
                        l10n.distractionsCount(
                          todayDistractions,
                          l10n.times(todayDistractions),
                        ),
                        style: AppTextStyles.bodyText,
                      ),
                      const SizedBox(height: 20),
                      Text(
                        '"$encouragement"',
                        style: AppTextStyles.encouragementQuote,
                      ),
                    ],
                  ),
                ),

                const SizedBox(height: 24),

                // Total Points Display
                Text(
                  l10n.totalPoints(totalPoints),
                  style: const TextStyle(
                    fontFamily: 'Nunito',
                    fontSize: 16,
                    fontWeight: FontWeight.w600,
                    color: AppColors.primary,
                  ),
                ),

                const SizedBox(height: 24),

                // Start Another Button
                SizedBox(
                  width: double.infinity,
                  child: ElevatedButton(
                    onPressed: () {
                      Navigator.pushAndRemoveUntil(
                        context,
                        MaterialPageRoute(
                          builder: (context) => HomeScreen(
                            encouragementService: encouragementService,
                          ),
                        ),
                        (route) => false,
                      );
                    },
                    child: Text(l10n.startAnother),
                  ),
                ),

                const SizedBox(height: 16),

                // View Full Report - Navigate to History
                TextButton(
                  onPressed: () {
                    Navigator.pushAndRemoveUntil(
                      context,
                      MaterialPageRoute(
                        builder: (context) => const HistoryScreen(),
                      ),
                      (route) => route.isFirst,
                    );
                  },
                  child: Text(l10n.viewHistory),
                ),

                const SizedBox(height: 40),
              ],
            ),
          ),
        ),
      ),
    );
  }

  /// Build points earned card
  Widget _buildPointsCard(BuildContext context, AppLocalizations l10n) {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: AppColors.white,
        borderRadius: BorderRadius.circular(16),
        border: Border.all(
          color: AppColors.primary.withValues(alpha: 0.3),
          width: 2,
        ),
      ),
      child: Column(
        children: [
          // Main points display
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text(
                l10n.earnedPoints,
                style: TextStyle(
                  fontFamily: 'Nunito',
                  fontSize: 18,
                  color: AppColors.textSecondary,
                ),
              ),
              const SizedBox(width: 8),
              Text(
                '+$pointsEarned',
                style: const TextStyle(
                  fontFamily: 'Nunito',
                  fontSize: 28,
                  fontWeight: FontWeight.bold,
                  color: AppColors.primary,
                ),
              ),
              const Text(' ⚡', style: TextStyle(fontSize: 24)),
            ],
          ),

          const SizedBox(height: 16),
          Divider(
            thickness: 1,
            color: AppColors.textSecondary.withValues(alpha: 0.2),
          ),
          const SizedBox(height: 12),

          // Points breakdown
          _buildPointRow(l10n.basePoints, '+$basePoints', AppColors.success),
          if (honestyBonus > 0) ...[
            const SizedBox(height: 8),
            _buildPointRow(
              l10n.honestyBonus,
              '+$honestyBonus',
              AppColors.success,
              subtitle: l10n.distractionsRecorded(
                distractionCount,
                l10n.distractions(distractionCount),
              ),
            ),
          ],
        ],
      ),
    );
  }

  /// Build a single point row in the breakdown
  Widget _buildPointRow(
    String label,
    String points,
    Color color, {
    String? subtitle,
  }) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 2),
      child: Column(
        children: [
          Row(
            children: [
              Text(
                '├─ ',
                style: TextStyle(
                  color: AppColors.textSecondary.withValues(alpha: 0.4),
                  fontFamily: 'Nunito',
                ),
              ),
              Text(
                label,
                style: const TextStyle(
                  fontFamily: 'Nunito',
                  fontSize: 14,
                  color: AppColors.textSecondary,
                ),
              ),
              const Spacer(),
              Text(
                points,
                style: TextStyle(
                  fontFamily: 'Nunito',
                  fontSize: 16,
                  fontWeight: FontWeight.w600,
                  color: color,
                ),
              ),
            ],
          ),
          if (subtitle != null)
            Padding(
              padding: const EdgeInsets.only(left: 24, top: 4),
              child: Row(
                children: [
                  Text(
                    subtitle,
                    style: TextStyle(
                      fontFamily: 'Nunito',
                      fontSize: 12,
                      color: AppColors.textSecondary.withValues(alpha: 0.7),
                    ),
                  ),
                ],
              ),
            ),
        ],
      ),
    );
  }

  /// Build achievement unlocked cards
  List<Widget> _buildAchievementCards(
    BuildContext context,
    AppLocalizations l10n,
  ) {
    return newAchievements.map((achievementId) {
      final achievement = AchievementConfig.getById(achievementId);
      if (achievement == null) return const SizedBox.shrink();

      return Container(
        margin: const EdgeInsets.only(bottom: 16),
        padding: const EdgeInsets.all(20),
        decoration: BoxDecoration(
          gradient: const LinearGradient(
            colors: [Color(0xFFFFD700), Color(0xFFFFC107)],
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
          ),
          borderRadius: BorderRadius.circular(16),
          boxShadow: [
            BoxShadow(
              color: Colors.orange.withValues(alpha: 0.4),
              blurRadius: 20,
              offset: const Offset(0, 8),
            ),
          ],
        ),
        child: Column(
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text(achievement.icon, style: const TextStyle(fontSize: 32)),
                const SizedBox(width: 12),
                Text(
                  l10n.achievementUnlocked,
                  style: const TextStyle(
                    fontFamily: 'Nunito',
                    fontSize: 18,
                    fontWeight: FontWeight.bold,
                    color: Colors.white,
                  ),
                ),
              ],
            ),
            const SizedBox(height: 12),
            Text(
              _getLocalizedAchievementName(l10n, achievement.nameKey),
              style: const TextStyle(
                fontFamily: 'Nunito',
                fontSize: 20,
                fontWeight: FontWeight.bold,
                color: Colors.white,
              ),
            ),
            const SizedBox(height: 4),
            Text(
              _getLocalizedAchievementDesc(l10n, achievement.descKey),
              style: const TextStyle(
                fontFamily: 'Nunito',
                fontSize: 14,
                color: Colors.white,
              ),
              textAlign: TextAlign.center,
            ),
            if (achievement.bonusPoints > 0) ...[
              const SizedBox(height: 8),
              Text(
                l10n.bonusPoints(achievement.bonusPoints),
                style: const TextStyle(
                  fontFamily: 'Nunito',
                  fontSize: 16,
                  fontWeight: FontWeight.w600,
                  color: Colors.white,
                ),
              ),
            ],
          ],
        ),
      );
    }).toList();
  }

  /// Get localized achievement name by key
  String _getLocalizedAchievementName(AppLocalizations l10n, String key) {
    switch (key) {
      case 'achievement_first_session_name':
        return l10n.achievement_first_session_name;
      case 'achievement_sessions_10_name':
        return l10n.achievement_sessions_10_name;
      case 'achievement_sessions_50_name':
        return l10n.achievement_sessions_50_name;
      case 'achievement_sessions_100_name':
        return l10n.achievement_sessions_100_name;
      case 'achievement_honest_bronze_name':
        return l10n.achievement_honest_bronze_name;
      case 'achievement_honest_silver_name':
        return l10n.achievement_honest_silver_name;
      case 'achievement_honest_gold_name':
        return l10n.achievement_honest_gold_name;
      case 'achievement_marathon_name':
        return l10n.achievement_marathon_name;
      case 'achievement_century_name':
        return l10n.achievement_century_name;
      case 'achievement_master_name':
        return l10n.achievement_master_name;
      case 'achievement_persistence_star_name':
        return l10n.achievement_persistence_star_name;
      case 'achievement_monthly_habit_name':
        return l10n.achievement_monthly_habit_name;
      case 'achievement_centurion_name':
        return l10n.achievement_centurion_name;
      case 'achievement_year_warrior_name':
        return l10n.achievement_year_warrior_name;
      default:
        return key;
    }
  }

  /// Get localized achievement description by key
  String _getLocalizedAchievementDesc(AppLocalizations l10n, String key) {
    switch (key) {
      case 'achievement_first_session_desc':
        return l10n.achievement_first_session_desc;
      case 'achievement_sessions_10_desc':
        return l10n.achievement_sessions_10_desc;
      case 'achievement_sessions_50_desc':
        return l10n.achievement_sessions_50_desc;
      case 'achievement_sessions_100_desc':
        return l10n.achievement_sessions_100_desc;
      case 'achievement_honest_bronze_desc':
        return l10n.achievement_honest_bronze_desc;
      case 'achievement_honest_silver_desc':
        return l10n.achievement_honest_silver_desc;
      case 'achievement_honest_gold_desc':
        return l10n.achievement_honest_gold_desc;
      case 'achievement_marathon_desc':
        return l10n.achievement_marathon_desc;
      case 'achievement_century_desc':
        return l10n.achievement_century_desc;
      case 'achievement_master_desc':
        return l10n.achievement_master_desc;
      case 'achievement_persistence_star_desc':
        return l10n.achievement_persistence_star_desc;
      case 'achievement_monthly_habit_desc':
        return l10n.achievement_monthly_habit_desc;
      case 'achievement_centurion_desc':
        return l10n.achievement_centurion_desc;
      case 'achievement_year_warrior_desc':
        return l10n.achievement_year_warrior_desc;
      default:
        return key;
    }
  }
}