import 'package:flutter/material.dart';

import '../../../core/i18n/app_locale.dart';
import '../../../core/theme/tokens.dart';
import '../home_data.dart';
import '../home_screen.dart' show formatPop;

/// HOME 주간 정보 — 발주사 9/9 검토회신 2항 · HOME 정보위계 v1.0 §2 의 2 · 3 · 6 · 7번(A-37).
///
/// 🟡 **배치는 임시다.** 기준 화면 「REFINE v5A · HOME · Default」 를 아직 실측하지 못해(당사 사본에
/// 없고 원본 파일은 로그인 필요) 정보 위계 v1.0 §7 「프레임 실측과 무관하게 반드시 포함」에 따라
/// 값만 먼저 싣는다. 자리 · 모양은 해석 확인 요청 영역A Q-A16 회신 또는 실측 후 맞춘다.
/// 값의 뜻은 [HomeWeekly] — 모르는 값은 0 으로 채우지 않고 「—」.
class HomeWeeklyCard extends StatelessWidget {
  const HomeWeeklyCard({super.key, required this.weekly});

  final HomeWeekly weekly;

  static const _label = TextStyle(
    fontFamily: AppFonts.body,
    fontSize: 13,
    height: 18 / 13,
    color: AppColors.onCosmicVariant,
  );
  static const _value = TextStyle(
    fontFamily: AppFonts.body,
    fontSize: 14,
    fontWeight: FontWeight.w600,
    height: 18 / 14,
    color: AppColors.onCosmic,
  );

  static String _signed(num v) => '${v >= 0 ? '+' : '−'}${formatPop(v.abs().round())}';

  @override
  Widget build(BuildContext context) {
    final l10n = context.l10n;
    final w = weekly;
    final change = w.rankChange;
    Widget row(String label, Widget value) => Padding(
      padding: const EdgeInsets.symmetric(vertical: AppSpace.s2),
      child: Row(
        children: [
          Expanded(child: Text(label, style: _label)),
          value,
        ],
      ),
    );
    Text text(String s) => Text(s, style: _value);

    return Container(
      padding: const EdgeInsets.symmetric(
        horizontal: AppSpace.s4,
        vertical: AppSpace.s2,
      ),
      decoration: BoxDecoration(
        color: AppColors.cosmicSurfaceContainer,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(color: AppColors.cosmicOutline),
      ),
      child: Column(
        children: [
          row(
            l10n.homeWeeklyRank,
            Row(
              mainAxisSize: MainAxisSize.min,
              children: [
                text(w.rank == null ? '—' : l10n.homeWeeklyRankValue('${w.rank}')),
                if (change != null && change != 0) ...[
                  const SizedBox(width: AppSpace.s1),
                  Text(
                    '${change > 0 ? '▲' : '▼'}${change.abs()}',
                    style: _value.copyWith(
                      fontSize: 12,
                      color: change > 0
                          ? AppColors.cosmicAccent
                          : AppColors.cosmicBlue,
                    ),
                  ),
                ],
              ],
            ),
          ),
          // 두 축 각각 — 단일 백분율로 합치지 않는다(§3 4번).
          row(
            l10n.homeWeeklyGrowth,
            text(
              '${w.weekGrowthPop == null ? '—' : _signed(w.weekGrowthPop!)} POP · '
              '${w.weekSfpi == null ? '—' : _signed(w.weekSfpi!)} sFPI',
            ),
          ),
          row(
            l10n.homeWeeklyMine,
            text(
              '${w.myWeekPop == null ? '—' : formatPop(w.myWeekPop!.round())} POP'
              '${w.myShare == null ? '' : ' · ${(w.myShare! * 100).toStringAsFixed(1)}%'}',
            ),
          ),
          row(
            l10n.homeWeeklyBalance,
            text(
              '${l10n.popKindGeneral} ${formatPop(w.generalPop)} · '
              '${l10n.popKindContribution} ${formatPop(w.supportPop)}',
            ),
          ),
        ],
      ),
    );
  }
}