import 'package:flutter/material.dart';

import 'package:go_router/go_router.dart';

import 'package:provider/provider.dart';

import 'package:sxchnge_wallet/sxchnge_wallet.dart';

import 'activity.dart';
import 'copy.dart';

import '../generated/i18n/app_localizations.dart';

class AccountsPage extends StatelessWidget {
  const AccountsPage({super.key, this.accountId});
  final String? accountId;
  @override
  Widget build(BuildContext context) {
    final p = context.watch<WalletProvider>();
    final l = AppLocalizations.of(context)!;
    final t = Theme.of(context);
    final c = t.colorScheme;
    final accounts = p.data?.accounts ?? [];
    final selected = accountId == null
        ? accounts.firstOrNull
        : p.account(accountId);
    return SingleChildScrollView(
      padding: const EdgeInsets.all(24),
      child: Center(
        child: ConstrainedBox(
          constraints: const BoxConstraints(maxWidth: 1120),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: Text(l.wHeadline, style: t.textTheme.displayMedium),
                  ),
                  IconButton(
                    tooltip: l.wRefresh,
                    onPressed: p.loading ? null : p.refresh,
                    icon: const Icon(Icons.refresh),
                  ),
                ],
              ),
              const SizedBox(height: 12),
              Text(l.wSubheading, style: t.textTheme.bodyLarge),
              const SizedBox(height: 16),
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(l.kycIntro),
                      TextButton(
                        onPressed: () => context.push('/identity'),
                        child: Text(l.wIdentity),
                      ),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 28),
              if (p.loading) const LinearProgressIndicator(),
              if (p.failed)
                Padding(
                  padding: const EdgeInsets.symmetric(vertical: 16),
                  child: Text(l.wUnavailable, style: TextStyle(color: c.error)),
                ),
              if (!p.loading && accounts.isEmpty) Text(l.wEmptyAccounts),
              if (accountId != null &&
                  p.account(accountId) == null &&
                  !p.loading)
                Text(l.wNotFound),
              if (selected != null) ...[
                const SizedBox(height: 24),
                Text(selected.currency, style: t.textTheme.titleLarge),
                const SizedBox(height: 12),
                Wrap(
                  spacing: 12,
                  runSpacing: 12,
                  children: [
                    for (final kind in TransferKind.values)
                      _action(
                        context,
                        kind,
                        selected,
                        primary:
                            kind ==
                            (selected.available == 0
                                ? TransferKind.topUp
                                : TransferKind.exchange),
                      ),
                  ],
                ),
              ],
              const SizedBox(height: 24),
              LayoutBuilder(
                builder: (context, box) {
                  final width = box.maxWidth >= 660
                      ? (box.maxWidth - 32) / 3
                      : box.maxWidth;
                  return Wrap(
                    spacing: 16,
                    runSpacing: 16,
                    children: [
                      for (var i = 0; i < accounts.length; i++)
                        SizedBox(
                          width: width,
                          child: _AccountCard(
                            account: accounts[i],
                            selected: accounts[i].id == selected?.id,
                            index: i,
                          ),
                        ),
                    ],
                  );
                },
              ),
              const SizedBox(height: 36),
              Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(l.wRecent, style: t.textTheme.headlineSmall),
                  TextButton(
                    onPressed: () => context.go('/activity'),
                    child: Text(l.wSeeAll),
                  ),
                ],
              ),
              const SizedBox(height: 12),
              ...?p.data?.operations
                  .where(
                    (o) =>
                        accountId == null ||
                        o.quote.request.source == accountId ||
                        o.quote.request.destination == accountId,
                  )
                  .take(5)
                  .map((o) => OperationTile(operation: o)),
              if (!(p.data?.operations.any(
                    (o) =>
                        accountId == null ||
                        o.quote.request.source == accountId ||
                        o.quote.request.destination == accountId,
                  ) ??
                  false))
                Container(
                  padding: const EdgeInsets.all(28),
                  decoration: BoxDecoration(
                    color: c.surfaceContainer,
                    borderRadius: BorderRadius.circular(24),
                  ),
                  child: Text(l.wEmptyActivity),
                ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _action(
    BuildContext context,
    TransferKind kind,
    CurrencyAccount a, {
    required bool primary,
  }) {
    final l = AppLocalizations.of(context)!;
    void go() => context.go(
      '/${kind.name == "topUp" ? "top-up" : kind.name}',
      extra: a.id,
    );
    return primary
        ? FilledButton.icon(
            key: ValueKey('${kind.name}-${a.id}'),
            onPressed: go,
            icon: Icon(kindIcon(kind)),
            label: Text(kindText(l, kind)),
          )
        : FilledButton.tonalIcon(
            key: ValueKey('${kind.name}-${a.id}'),
            onPressed: go,
            icon: Icon(kindIcon(kind)),
            label: Text(kindText(l, kind)),
          );
  }
}

class _AccountCard extends StatelessWidget {
  const _AccountCard({
    required this.account,
    required this.selected,
    required this.index,
  });
  final CurrencyAccount account;
  final bool selected;
  final int index;
  @override
  Widget build(BuildContext context) {
    final l = AppLocalizations.of(context)!;
    final t = Theme.of(context);
    final c = t.colorScheme;
    final bg = selected
        ? c.primary
        : index == 1
        ? c.tertiaryContainer
        : c.primaryContainer;
    final fg = selected
        ? c.onPrimary
        : index == 1
        ? c.onTertiaryContainer
        : c.onPrimaryContainer;
    return Semantics(
      selected: selected,
      child: Material(
        color: bg,
        borderRadius: BorderRadius.circular(28),
        child: InkWell(
          key: ValueKey('account-${account.id}'),
          borderRadius: BorderRadius.circular(28),
          onTap: () => context.go('/accounts/${account.id}'),
          child: Padding(
            padding: const EdgeInsets.all(24),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                Row(
                  children: [
                    Text(
                      account.currency,
                      style: t.textTheme.titleLarge?.copyWith(color: fg),
                    ),
                    const Spacer(),
                    Icon(
                      selected
                          ? Icons.check_circle_outline
                          : Icons.arrow_outward_rounded,
                      color: fg,
                    ),
                  ],
                ),
                const SizedBox(height: 32),
                Text(l.wAvailable, style: TextStyle(color: fg)),
                const SizedBox(height: 8),
                Text(
                  money(context, account, account.available),
                  key: ValueKey('balance-${account.id}'),
                  style: t.textTheme.headlineMedium?.copyWith(color: fg),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}