import 'package:auto_route/auto_route.dart';
import 'package:cubit_form/cubit_form.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:flutter/material.dart';
import 'package:selfprivacy/logic/cubit/forms/setup/initializing/server_provider_form_cubit.dart';
import 'package:selfprivacy/logic/cubit/server_installation/server_installation_cubit.dart';
import 'package:selfprivacy/logic/cubit/forms/factories/field_cubit_factory.dart';
import 'package:selfprivacy/logic/cubit/forms/setup/initializing/backblaze_form_cubit.dart';
import 'package:selfprivacy/logic/cubit/forms/setup/initializing/dns_provider_form_cubit.dart';
import 'package:selfprivacy/logic/cubit/forms/setup/initializing/domain_setup_cubit.dart';
import 'package:selfprivacy/logic/cubit/forms/setup/initializing/root_user_form_cubit.dart';
import 'package:selfprivacy/logic/cubit/support_system/support_system_cubit.dart';
import 'package:selfprivacy/logic/providers/providers_controller.dart';
import 'package:selfprivacy/ui/components/buttons/brand_button.dart';
import 'package:selfprivacy/ui/components/brand_timer/brand_timer.dart';
import 'package:selfprivacy/ui/components/buttons/outlined_button.dart';
import 'package:selfprivacy/ui/components/drawers/progress_drawer.dart';
import 'package:selfprivacy/ui/components/progress_bar/progress_bar.dart';
import 'package:selfprivacy/ui/components/drawers/support_drawer.dart';
import 'package:selfprivacy/ui/layouts/responsive_layout_with_infobox.dart';
import 'package:selfprivacy/ui/pages/setup/initializing/broken_domain_outlined_card.dart';
import 'package:selfprivacy/ui/pages/setup/initializing/dns_provider_picker.dart';
import 'package:selfprivacy/ui/pages/setup/initializing/domain_picker.dart';
import 'package:selfprivacy/ui/pages/setup/initializing/server_provider_picker.dart';
import 'package:selfprivacy/ui/pages/setup/initializing/server_type_picker.dart';
import 'package:selfprivacy/ui/pages/setup/recovering/recovery_routing.dart';
import 'package:selfprivacy/ui/router/router.dart';
import 'package:selfprivacy/utils/breakpoints.dart';
import 'package:selfprivacy/utils/network_utils.dart';

@RoutePage()
class InitializingPage extends StatelessWidget {
  const InitializingPage({super.key});

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

    if (cubit.state is ServerInstallationRecovery) {
      return const RecoveryRouting();
    } else {
      Widget? actualInitializingPage;
      if (cubit.state is! ServerInstallationFinished) {
        actualInitializingPage = [
          () => _stepServerProviderToken(cubit),
          () => _stepServerType(cubit),
          () => _stepDnsProviderToken(cubit),
          () => _stepBackblaze(cubit),
          () => _stepDomain(cubit),
          () => _stepUser(cubit),
          () => _stepServer(cubit),
          () => _stepCheck(cubit),
          () => _stepCheck(cubit),
          () => _stepCheck(cubit),
          () => _stepCheck(cubit),
        ][cubit.state.progress.index]();
      }

      const steps = [
        'initializing.steps.hosting',
        'initializing.steps.server_type',
        'initializing.steps.dns_provider',
        'initializing.steps.backups_provider',
        'initializing.steps.domain',
        'initializing.steps.master_account',
        'initializing.steps.server',
        'initializing.steps.dns_setup',
        'initializing.steps.nixos_installation',
        'initializing.steps.server_reboot',
        'initializing.steps.final_checks',
      ];

      return BlocListener<ServerInstallationCubit, ServerInstallationState>(
        listener: (final context, final state) {
          if (cubit.state is ServerInstallationFinished) {
            context.router.popUntilRoot();
          }
        },
        child: Scaffold(
          endDrawer: const SupportDrawer(),
          endDrawerEnableOpenDragGesture: false,
          appBar: Breakpoints.large.isActive(context)
              ? null
              : AppBar(
                  actions: [
                    if (cubit.state is ServerInstallationFinished)
                      IconButton(
                        icon: const Icon(Icons.check),
                        onPressed: () {
                          context.router.popUntilRoot();
                        },
                      ),
                    const SizedBox.shrink(),
                  ],
                  title: Text(
                    'more_page.configuration_wizard'.tr(),
                  ),
                  bottom: PreferredSize(
                    preferredSize: const Size.fromHeight(28),
                    child: Padding(
                      padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
                      child: ProgressBar(
                        steps: const [
                          'Hosting',
                          'Server Type',
                          'DNS Provider',
                          'Backblaze',
                          'Domain',
                          'User',
                          'Server',
                          'Installation',
                        ],
                        activeIndex: cubit.state.porgressBar,
                      ),
                    ),
                  ),
                ),
          body: LayoutBuilder(
            builder: (final context, final constraints) => Row(
              children: [
                if (Breakpoints.large.isActive(context))
                  ProgressDrawer(
                    steps: steps,
                    currentStep: cubit.state.progress.index,
                    title: 'more_page.configuration_wizard'.tr(),
                    constraints: constraints,
                    trailing: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        if (cubit.state is ServerInstallationEmpty ||
                            cubit.state is ServerInstallationNotFinished)
                          Container(
                            alignment: Alignment.center,
                            child: BrandButton.filled(
                              text: 'basis.connect_to_existing'.tr(),
                              onPressed: () {
                                context.router.replace(const RecoveryRoute());
                              },
                            ),
                          ),
                        // const SizedBox(height: 8),
                        BrandOutlinedButton(
                          child: Text(
                            cubit.state is ServerInstallationFinished
                                ? 'basis.close'.tr()
                                : 'basis.later'.tr(),
                          ),
                          onPressed: () {
                            context.router.popUntilRoot();
                          },
                        ),
                      ],
                    ),
                  ),
                SizedBox(
                  width: constraints.maxWidth -
                      (Breakpoints.large.isActive(context) ? 300 : 0),
                  height: constraints.maxHeight,
                  child: SingleChildScrollView(
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Padding(
                          padding: Breakpoints.large.isActive(context)
                              ? const EdgeInsets.all(16.0)
                              : const EdgeInsets.fromLTRB(16.0, 0, 16.0, 0.0),
                          child: AnimatedSwitcher(
                            duration: const Duration(milliseconds: 300),
                            child: actualInitializingPage,
                          ),
                        ),
                        if (!Breakpoints.large.isActive(context))
                          Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              Container(
                                alignment: Alignment.center,
                                child: BrandButton.text(
                                  title:
                                      cubit.state is ServerInstallationFinished
                                          ? 'basis.close'.tr()
                                          : 'basis.later'.tr(),
                                  onPressed: () {
                                    context.router.popUntilRoot();
                                  },
                                ),
                              ),
                              if (cubit.state is ServerInstallationEmpty ||
                                  cubit.state is ServerInstallationNotFinished)
                                Container(
                                  alignment: Alignment.center,
                                  child: BrandButton.text(
                                    title: 'basis.connect_to_existing'.tr(),
                                    onPressed: () {
                                      context.router
                                          .replace(const RecoveryRoute());
                                    },
                                  ),
                                ),
                            ],
                          ),
                      ],
                    ),
                  ),
                ),
              ],
            ),
          ),
        ),
      );
    }
  }

  Widget _stepServerProviderToken(
    final ServerInstallationCubit serverInstallationCubit,
  ) =>
      BlocProvider(
        create: (final context) =>
            ServerProviderFormCubit(serverInstallationCubit),
        child: Builder(
          builder: (final context) {
            final providerCubit = context.watch<ServerProviderFormCubit>();
            return ServerProviderPicker(
              formCubit: providerCubit,
              serverInstallationCubit: serverInstallationCubit,
            );
          },
        ),
      );

  Widget _stepServerType(
    final ServerInstallationCubit serverInstallationCubit,
  ) =>
      BlocProvider(
        create: (final context) =>
            ServerProviderFormCubit(serverInstallationCubit),
        child: Builder(
          builder: (final context) => ServerTypePicker(
            serverInstallationCubit: serverInstallationCubit,
          ),
        ),
      );

  Widget _stepDnsProviderToken(
    final ServerInstallationCubit initializingCubit,
  ) =>
      BlocProvider(
        create: (final context) => DnsProviderFormCubit(initializingCubit),
        child: Builder(
          builder: (final context) {
            final providerCubit = context.watch<DnsProviderFormCubit>();
            return DnsProviderPicker(
              formCubit: providerCubit,
              serverInstallationCubit: initializingCubit,
            );
          },
        ),
      );

  Widget _stepBackblaze(final ServerInstallationCubit initializingCubit) =>
      BlocProvider(
        create: (final context) => BackblazeFormCubit(initializingCubit),
        child: Builder(
          builder: (final context) {
            final formCubitState = context.watch<BackblazeFormCubit>().state;
            return ResponsiveLayoutWithInfobox(
              topChild: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    '${'initializing.connect_to_server_provider'.tr()}Backblaze',
                    style: Theme.of(context).textTheme.headlineSmall,
                  ),
                ],
              ),
              primaryColumn: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  CubitFormTextField(
                    autofocus: true,
                    formFieldCubit: context.read<BackblazeFormCubit>().keyId,
                    textAlign: TextAlign.center,
                    scrollPadding: const EdgeInsets.only(bottom: 70),
                    decoration: const InputDecoration(
                      hintText: 'KeyID',
                    ),
                  ),
                  const SizedBox(height: 16),
                  CubitFormTextField(
                    formFieldCubit:
                        context.read<BackblazeFormCubit>().applicationKey,
                    textAlign: TextAlign.center,
                    scrollPadding: const EdgeInsets.only(bottom: 70),
                    decoration: const InputDecoration(
                      hintText: 'Master Application Key',
                    ),
                  ),
                  const SizedBox(height: 32),
                  BrandButton.rised(
                    onPressed: formCubitState.isSubmitting
                        ? null
                        : () => context.read<BackblazeFormCubit>().trySubmit(),
                    text: 'basis.connect'.tr(),
                  ),
                  const SizedBox(height: 10),
                  BrandButton.text(
                    onPressed: () {
                      context.read<SupportSystemCubit>().showArticle(
                            article: 'how_backblaze',
                            context: context,
                          );
                      Scaffold.of(context).openEndDrawer();
                    },
                    title: 'initializing.how'.tr(),
                  ),
                ],
              ),
            );
          },
        ),
      );

  Widget _stepDomain(final ServerInstallationCubit initializingCubit) =>
      BlocProvider(
        create: (final context) => DomainSetupCubit(initializingCubit)..load(),
        child: const DomainPicker(),
      );

  Widget _stepUser(final ServerInstallationCubit initializingCubit) =>
      BlocProvider(
        create: (final context) =>
            RootUserFormCubit(initializingCubit, FieldCubitFactory(context)),
        child: Builder(
          builder: (final context) {
            final formCubitState = context.watch<RootUserFormCubit>().state;

            return ResponsiveLayoutWithInfobox(
              topChild: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    'initializing.create_master_account'.tr(),
                    style: Theme.of(context).textTheme.headlineSmall,
                  ),
                  const SizedBox(height: 16),
                  Text(
                    'initializing.enter_username_and_password'.tr(),
                    style: Theme.of(context).textTheme.bodyMedium,
                  ),
                ],
              ),
              primaryColumn: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  if (formCubitState.isErrorShown) const SizedBox(height: 16),
                  if (formCubitState.isErrorShown)
                    Text(
                      'users.username_rule'.tr(),
                      style: TextStyle(
                        color: Theme.of(context).colorScheme.error,
                      ),
                    ),
                  const SizedBox(height: 32),
                  CubitFormTextField(
                    autofocus: true,
                    formFieldCubit: context.read<RootUserFormCubit>().userName,
                    textAlign: TextAlign.center,
                    scrollPadding: const EdgeInsets.only(bottom: 70),
                    decoration: InputDecoration(
                      hintText: 'basis.username'.tr(),
                    ),
                  ),
                  const SizedBox(height: 16),
                  BlocBuilder<FieldCubit<bool>, FieldCubitState<bool>>(
                    bloc: context.read<RootUserFormCubit>().isVisible,
                    builder: (final context, final state) {
                      final bool isVisible = state.value;
                      return CubitFormTextField(
                        obscureText: !isVisible,
                        formFieldCubit:
                            context.read<RootUserFormCubit>().password,
                        textAlign: TextAlign.center,
                        scrollPadding: const EdgeInsets.only(bottom: 70),
                        decoration: InputDecoration(
                          hintText: 'basis.password'.tr(),
                          suffixIcon: IconButton(
                            icon: Icon(
                              isVisible
                                  ? Icons.visibility
                                  : Icons.visibility_off,
                            ),
                            onPressed: () => context
                                .read<RootUserFormCubit>()
                                .isVisible
                                .setValue(!isVisible),
                          ),
                          suffixIconConstraints:
                              const BoxConstraints(minWidth: 60),
                          prefixIconConstraints:
                              const BoxConstraints(maxWidth: 60),
                          prefixIcon: Container(),
                        ),
                      );
                    },
                  ),
                  const SizedBox(height: 32),
                  BrandButton.filled(
                    onPressed: formCubitState.isSubmitting
                        ? null
                        : () => context.read<RootUserFormCubit>().trySubmit(),
                    text: 'basis.connect'.tr(),
                  ),
                ],
              ),
            );
          },
        ),
      );

  Widget _stepServer(final ServerInstallationCubit appConfigCubit) {
    final bool isLoading =
        (appConfigCubit.state as ServerInstallationNotFinished).isLoading;
    return Builder(
      builder: (final context) => ResponsiveLayoutWithInfobox(
        topChild: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              'initializing.final'.tr(),
              style: Theme.of(context).textTheme.headlineSmall,
            ),
            const SizedBox(height: 16),
            Text(
              'initializing.create_server'.tr(),
              style: Theme.of(context).textTheme.bodyMedium,
            ),
          ],
        ),
        primaryColumn: BrandButton.filled(
          onPressed:
              isLoading ? null : appConfigCubit.createServerAndSetDnsRecords,
          text: isLoading
              ? 'basis.loading'.tr()
              : 'initializing.create_server'.tr(),
        ),
      ),
    );
  }

  Widget _stepCheck(final ServerInstallationCubit appConfigCubit) {
    assert(
      appConfigCubit.state is ServerInstallationNotFinished,
      'wrong state',
    );
    final state = appConfigCubit.state as TimerState;
    late int doneCount;
    late String? text;
    if (state.isServerResetedSecondTime) {
      text = 'initializing.server_rebooted'.tr();
      doneCount = 3;
    } else if (state.isServerResetedFirstTime) {
      text = 'initializing.one_more_restart'.tr();
      doneCount = 2;
    } else if (state.isServerStarted) {
      text = 'initializing.server_started'.tr();
      doneCount = 1;
    } else if (state.isServerCreated) {
      text = 'initializing.server_created'.tr();
      doneCount = 0;
    }
    return Builder(
      builder: (final context) => SizedBox(
        width: double.infinity,
        child: ResponsiveLayoutWithInfobox(
          topChild: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                'initializing.checks'.tr(args: [doneCount.toString(), '4']),
                style: Theme.of(context).textTheme.headlineSmall,
              ),
              const SizedBox(height: 16),
              if (text != null)
                Text(
                  text,
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
            ],
          ),
          primaryColumn: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const SizedBox(height: 128),
              const SizedBox(height: 10),
              if (doneCount == 0 && state.dnsMatches != null)
                Column(
                  children: state.dnsMatches!.entries.map((final entry) {
                    final String domain = entry.key;
                    if (entry.value == DnsRecordStatus.nonexistent) {
                      return BrokenDomainOutlinedCard(
                        domain: domain,
                        dnsProvider: ProvidersController.currentDnsProvider!,
                      );
                    }
                    return Row(
                      children: [
                        if (entry.value == DnsRecordStatus.ok)
                          const Icon(Icons.check, color: Colors.green),
                        if (entry.value == DnsRecordStatus.waiting)
                          const Icon(Icons.schedule, color: Colors.amber),
                        const SizedBox(width: 10),
                        Text(domain),
                      ],
                    );
                  }).toList(),
                ),
              const SizedBox(height: 10),
              if (!state.isLoading)
                Row(
                  children: [
                    Text(
                      'initializing.until_the_next_check'.tr(),
                      style: Theme.of(context).textTheme.bodyMedium,
                    ),
                    BrandTimer(
                      startDateTime: state.timerStart!,
                      duration: state.duration!,
                    ),
                  ],
                ),
              if (state.isLoading)
                Text(
                  'initializing.check'.tr(),
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
            ],
          ),
        ),
      ),
    );
  }
}