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

import '../../core/time.dart';
import '../../domain/models/tracker_entry.dart';
import '../../domain/streak/compute_streak.dart';
import '../../state/providers.dart';

class StreakScreen extends ConsumerWidget {
  final String habitId;
  const StreakScreen({super.key, required this.habitId});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final db = ref.watch(appDatabaseProvider);
    final habitFuture = (db.select(db.habits)
          ..where((t) => t.id.equals(habitId)))
        .getSingle();
    final entriesFuture = ref.read(trackerDaoProvider).entriesForHabit(habitId);

    return Scaffold(
      appBar: AppBar(title: const Text('스트릭')),
      body: FutureBuilder(
        future: Future.wait([habitFuture, entriesFuture]),
        builder: (context, snap) {
          if (!snap.hasData) {
            return const Center(child: CircularProgressIndicator());
          }
          if (snap.hasError) {
            return Center(child: Text('실패: ${snap.error}'));
          }
          final habit = snap.data![0] as dynamic;
          final entryRows = snap.data![1] as List;
          final entries = entryRows.map((r) {
            return TrackerEntryModel(
              id: r.id as String,
              habitId: r.habitId as String,
              date: r.date as String,
              value: (r.value as String) == 'done'
                  ? TrackerValue.done
                  : TrackerValue.blank,
              variantId: r.variantId as String?,
              ctxLocation: r.ctxLocation as String?,
              ctxCondition: r.ctxCondition as String?,
              note: r.note as String?,
              loggedAt: r.loggedAt as String?,
            );
          }).toList();
          final state = computeStreak(
            entries: entries,
            asOf: nowKst(),
            habitStartedAt: habit.startedAt as String,
          );
          return Padding(
            padding: const EdgeInsets.all(24),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(habit.title as String,
                    style: Theme.of(context).textTheme.titleLarge),
                const SizedBox(height: 24),
                _Row('현재 스트릭', '${state.currentStreak}일'),
                _Row('최장 스트릭', '${state.longestStreak}일'),
                _Row('최근 30일 / 완료', '${state.doneCountInWindow30}회'),
                _Row('Phase 42일 / 완료', '${state.doneCountInPhase42}회'),
                const Divider(height: 32),
                _Row('현재 티어', state.currentTier.dbValue),
                if (state.neverMissTwiceBroken)
                  const Padding(
                    padding: EdgeInsets.only(top: 12),
                    child: Text(
                      '⚠ Never miss twice 발동 — 티어 강등',
                      style: TextStyle(color: Colors.redAccent),
                    ),
                  ),
              ],
            ),
          );
        },
      ),
    );
  }
}

class _Row extends StatelessWidget {
  final String label;
  final String value;
  const _Row(this.label, this.value);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 6),
      child: Row(
        children: [
          Expanded(child: Text(label)),
          Text(value, style: const TextStyle(fontWeight: FontWeight.w600)),
        ],
      ),
    );
  }
}