import 'package:flutter/cupertino.dart';
import 'package:please_pay_me/core/format/formatters.dart';
import 'package:please_pay_me/data/models/job.dart';
import 'package:please_pay_me/features/work/job_form_sheet.dart';
import 'package:please_pay_me/features/work/jobs_controller.dart';
import 'package:please_pay_me/theme/theme.dart';
import 'package:please_pay_me/ui/ui.dart';
import 'package:provider/provider.dart';

/// Jobs and their payday schedule.
class WorkScreen extends StatelessWidget {
  const WorkScreen({super.key});

  @override
  Widget build(BuildContext context) {
    final controller = context.watch<JobsController>();

    return CupertinoPageScaffold(
      backgroundColor: AppColors.of(context, AppColors.groupedBackground),
      child: CustomScrollView(
        physics: const BouncingScrollPhysics(parent: AlwaysScrollableScrollPhysics()),
        slivers: [
          AppLargeNavBar(
            title: 'Работа',
            trailing: CupertinoButton(
              padding: EdgeInsets.zero,
              minimumSize: Size.zero,
              onPressed: () => showJobFormSheet(context: context, controller: controller),
              child: const AppIcon(CupertinoIcons.add_circled, color: AppColors.accent),
            ),
          ),
          CupertinoSliverRefreshControl(onRefresh: () => controller.load(silent: true)),
          SliverToBoxAdapter(
            child: controller.state.map(
              loading: () => AppListSection(
                children: List.generate(2, (_) => const AppSkeletonRow()),
              ),
              error: (message) => AppErrorView(message: message, onRetry: controller.load),
              data: (jobs) => jobs.isEmpty
                  ? AppEmptyState(
                      icon: CupertinoIcons.briefcase,
                      title: 'Работа не добавлена',
                      message: 'Укажите оклад и дни выплат — приложение подскажет даты зарплаты.',
                      actionLabel: 'Добавить работу',
                      onAction: () =>
                          showJobFormSheet(context: context, controller: controller),
                    )
                  : Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        for (final job in jobs) ...[
                          _JobCard(job: job, controller: controller),
                          const SizedBox(height: AppSpacing.s5),
                        ],
                      ],
                    ),
            ),
          ),
          const SliverToBoxAdapter(child: SizedBox(height: AppSpacing.s7)),
        ],
      ),
    );
  }
}

class _JobCard extends StatelessWidget {
  const _JobCard({required this.job, required this.controller});

  final Job job;
  final JobsController controller;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        AppListSection(
          header: job.name,
          separatorIndent: 60,
          children: [
            AppListTile(
              leading: const AppIconBadge(
                icon: CupertinoIcons.briefcase_fill,
                color: AppColors.accent,
              ),
              title: 'Оклад',
              value: formatMoney(job.salaryAmount, currency: job.currency),
              showChevron: false,
            ),
            AppListTile(
              leading: const AppIconBadge(
                icon: CupertinoIcons.calendar,
                color: AppColors.systemOrange,
              ),
              title: 'Дни выплат',
              value: job.payDays.map((day) => '$day').join(' и '),
              showChevron: false,
            ),
            AppListTile(
              leading: const AppIconBadge(
                icon: CupertinoIcons.arrow_left_right,
                color: AppColors.systemGray,
              ),
              title: 'Выходные',
              value: job.weekendPolicy.label,
              showChevron: false,
            ),
            AppListTile(
              title: 'Настроить',
              onTap: () => _openActions(context),
            ),
          ],
        ),
        if (job.nextPays.isNotEmpty) ...[
          const SizedBox(height: AppSpacing.s4),
          AppListSection(
            header: 'Ближайшие выплаты',
            children: [
              for (final pay in job.nextPays)
                AppListTile(
                  title: formatDay(pay.date),
                  subtitle: '${pay.percent.round()}% оклада · ${pay.scheduledDay} числа',
                  value: formatMoney(pay.amount, currency: job.currency),
                  showChevron: false,
                ),
            ],
          ),
        ],
      ],
    );
  }

  Future<void> _openActions(BuildContext context) async {
    final index = await showAppActionSheet(
      context: context,
      title: job.name,
      actions: const [
        AppActionSheetAction(label: 'Редактировать', isDefault: true),
        AppActionSheetAction(label: 'Удалить', destructive: true),
      ],
    );

    if (index == null || !context.mounted) return;

    if (index == 0) {
      await showJobFormSheet(context: context, controller: controller, initial: job);
      return;
    }

    final confirmed = await showAppAlert(
      context: context,
      title: 'Удалить «${job.name}»?',
      message: 'График выплат тоже будет удалён.',
      confirmLabel: 'Удалить',
      cancelLabel: 'Отмена',
      destructive: true,
    );

    if (confirmed != true) return;

    final error = await controller.delete(job.id);
    if (context.mounted) {
      await showAppToast(context, message: error ?? 'Работа удалена');
    }
  }
}