// ignore_for_file: invalid_use_of_protected_member

part of '../../registration_page.dart';

extension _RegistrationSubmitPart on _RegistrationPageState {
  Future<void> _submit() async {
    if (!_canSubmit) return;

    final baseUrl = await _baseUrl();
    if (baseUrl == null) {
      _feedbackService.trigger(FeedbackEvent.submitFailure);
      _showStatusOverride(
        '未配置 API 地址，请前往设置',
        StatusDotColor.red,
        const Duration(seconds: 2),
      );
      return;
    }

    setState(() => _isSubmitting = true);

    // For transit target: block if any scanned item is already transferred
    // (on_shelf items are allowed — transit registration acts as off-shelf)
    if (_isTransitTarget) {
      final transferredItems = _findTransferredItemsInScanned();
      if (transferredItems.isNotEmpty) {
        setState(() => _isSubmitting = false);
        _feedbackService.trigger(FeedbackEvent.submitFailure);
        _showLocationConflictDialog(
          onShelfItems: [],
          transferredItems: transferredItems,
        );
        return;
      }
    }

    // For temp storage target: block if any scanned item is transferred or temp_stored
    // (on_shelf items are allowed — temp storage acts as shelf change)
    if (_isTempStorageTarget) {
      final transferredItems = _findTransferredItemsInScanned();
      final tempStoredItems = _findTempStoredItemsInScanned();
      if (transferredItems.isNotEmpty || tempStoredItems.isNotEmpty) {
        setState(() => _isSubmitting = false);
        _feedbackService.trigger(FeedbackEvent.submitFailure);
        _showLocationConflictDialog(
          onShelfItems: [],
          transferredItems: transferredItems,
          tempStoredItems: tempStoredItems,
        );
        return;
      }
    }

    if (_mode == RegistrationMode.multiCode && _zongpaiNos.length > 1) {
      if (_isTransitTarget && !await _ensureBatchSamePaicha(baseUrl)) {
        if (!mounted) return;
        setState(() => _isSubmitting = false);
        _feedbackService.trigger(FeedbackEvent.submitFailure);
        _showStatusOverride(
          batchPaichaMismatchMessage,
          StatusDotColor.red,
          const Duration(seconds: 2),
        );
        return;
      }
      // Pre-check: block entire batch if any item already has a location binding
      if (!_isTransitTarget && !_isTempStorageTarget) {
        final onShelfItems = _findOnShelfItemsInScanned();
        final transferredItems = _findTransferredItemsInScanned();
        if (onShelfItems.isNotEmpty || transferredItems.isNotEmpty) {
          setState(() => _isSubmitting = false);
          _feedbackService.trigger(FeedbackEvent.duplicateError);
          _showLocationConflictDialog(
            onShelfItems: onShelfItems,
            transferredItems: transferredItems,
          );
          return;
        }
      }
      await _submitBatch(baseUrl);
    } else {
      await _submitOne(baseUrl, _zongpaiNos.first);
    }
  }

  Future<bool> _ensureBatchSamePaicha(String baseUrl) async {
    final paichaByCode = <String, String>{};
    final cachedOverview = _overview;
    if (cachedOverview?.success == true && cachedOverview!.paichaNo != null) {
      for (final item in cachedOverview.items) {
        paichaByCode[item.zongpaiNo] = cachedOverview.paichaNo!;
      }
    }

    for (final zongpaiNo in _zongpaiNos) {
      if (paichaByCode.containsKey(zongpaiNo)) continue;
      final result = await _apiService.fetchPaichaOverview(
        baseUrl: baseUrl,
        zongpaiNo: zongpaiNo,
      );
      if (!result.success || result.paichaNo == null) {
        return false;
      }
      for (final item in result.items) {
        paichaByCode[item.zongpaiNo] = result.paichaNo!;
      }
    }

    return allSamePaicha(_zongpaiNos.map((code) => paichaByCode[code]));
  }

  Future<void> _submitOne(String baseUrl, String zongpaiNo) async {
    final result = await _apiService.registerLocation(
      baseUrl: baseUrl,
      zongpaiNo: zongpaiNo,
      locationCode: _locationCode!,
    );

    if (!mounted) return;

    setState(() => _isSubmitting = false);

    if (result.success) {
      _feedbackService.trigger(FeedbackEvent.submitSuccess);
      if (_isTransitTarget) {
        setState(() => _isSubmitting = false);
        await _navigateToBoxing(
          mode: BoxingMode.singleCode,
          codes: [zongpaiNo],
          codesToClear: [zongpaiNo],
          clearLocation: _mode == RegistrationMode.singleCode,
        );
        return;
      }
      setState(() {
        _zongpaiNos.remove(zongpaiNo);
        if (_mode == RegistrationMode.singleCode && !_isTempStorageTarget) {
          _locationCode = null;
          _locationType = null;
        }
      });
      final msg = result.isOffShelfSuccess
          ? '下架成功'
          : _isTempStorageTarget
          ? '变更货架成功'
          : (_mode == RegistrationMode.multiCode ? '多码上架模式，请扫描下一张执行卡' : '上架成功');
      _showStatusOverride(
        msg,
        StatusDotColor.green,
        const Duration(milliseconds: 1500),
      );
      await _refreshCurrentOverview();
    } else if (result.isDuplicate) {
      _feedbackService.trigger(FeedbackEvent.duplicateError);
      _showDuplicateDialog(zongpaiNo, result.duplicateInfo);
    } else if (result.isAlreadyOffShelf) {
      _feedbackService.trigger(FeedbackEvent.submitFailure);
      _showStatusOverride(
        result.errorMessage ?? '该总排号已下架至转运区域，不可重新上架',
        StatusDotColor.red,
        const Duration(seconds: 2),
      );
    } else {
      final isNetwork = result.errorMessage == '网络异常，请检查网络连接';
      _feedbackService.trigger(
        isNetwork ? FeedbackEvent.networkError : FeedbackEvent.submitFailure,
      );
      _showStatusOverride(
        result.errorMessage ?? '提交失败',
        isNetwork ? StatusDotColor.yellow : StatusDotColor.red,
        const Duration(seconds: 2),
      );
    }
  }

  Future<void> _submitBatch(String baseUrl) async {
    int successCount = 0;
    int offShelfCount = 0;
    final failed = <String>[];
    final toRemove = <String>[];
    final transitCodes = <String>[];

    for (final zongpaiNo in List.of(_zongpaiNos)) {
      final result = await _apiService.registerLocation(
        baseUrl: baseUrl,
        zongpaiNo: zongpaiNo,
        locationCode: _locationCode!,
      );
      if (result.success) {
        successCount++;
        if (result.isOffShelfSuccess) {
          offShelfCount++;
        }
        toRemove.add(zongpaiNo);
        if (_isTransitTarget) {
          transitCodes.add(zongpaiNo);
        }
      } else {
        failed.add(zongpaiNo);
        if (result.isDuplicate) {
          if (_isTransitTarget && transitCodes.isNotEmpty) {
            setState(() {
              _zongpaiNos.removeWhere((item) => toRemove.contains(item));
              _isSubmitting = false;
            });
            await _navigateToBoxing(
              mode: BoxingMode.multiCode,
              codes: transitCodes,
              codesToClear: toRemove,
              clearLocation: false,
              returnMessage: '成功 $successCount 条，失败 ${failed.length} 条',
            );
            return;
          }
          setState(() {
            _zongpaiNos.removeWhere((item) => toRemove.contains(item));
            _isSubmitting = false;
          });
          _feedbackService.trigger(FeedbackEvent.duplicateError);
          _showDuplicateDialog(zongpaiNo, result.duplicateInfo);
          return;
        }
        if (result.isAlreadyOffShelf) {
          if (_isTransitTarget && transitCodes.isNotEmpty) {
            setState(() {
              _zongpaiNos.removeWhere((item) => toRemove.contains(item));
              _isSubmitting = false;
            });
            await _navigateToBoxing(
              mode: BoxingMode.multiCode,
              codes: transitCodes,
              codesToClear: toRemove,
              clearLocation: false,
              returnMessage: '成功 $successCount 条，失败 ${failed.length} 条',
            );
            return;
          }
          setState(() {
            _zongpaiNos.removeWhere((item) => toRemove.contains(item));
            _isSubmitting = false;
          });
          _feedbackService.trigger(FeedbackEvent.submitFailure);
          _showStatusOverride(
            result.errorMessage ?? '该总排号已下架至转运区域，不可重新上架',
            StatusDotColor.red,
            const Duration(seconds: 2),
          );
          return;
        }
      }
    }

    if (!mounted) return;

    setState(() {
      _zongpaiNos.removeWhere((item) => toRemove.contains(item));
      _isSubmitting = false;
    });

    if (_isTransitTarget && transitCodes.isNotEmpty) {
      await _navigateToBoxing(
        mode: BoxingMode.multiCode,
        codes: transitCodes,
        codesToClear: toRemove,
        clearLocation: failed.isEmpty,
        returnMessage: failed.isEmpty
            ? null
            : '成功 $successCount 条，失败 ${failed.length} 条',
      );
      return;
    }

    if (failed.isEmpty) {
      _feedbackService.trigger(FeedbackEvent.submitSuccess);
      final msg = offShelfCount == successCount
          ? '批量下架成功（$successCount 条）'
          : '批量上架成功（$successCount 条）';
      _showStatusOverride(
        msg,
        StatusDotColor.green,
        const Duration(milliseconds: 1500),
      );
      await _refreshCurrentOverview();
    } else {
      _feedbackService.trigger(FeedbackEvent.submitFailure);
      _showStatusOverride(
        '成功 $successCount 条，失败 ${failed.length} 条',
        StatusDotColor.red,
        const Duration(seconds: 2),
      );
    }
  }

  Future<void> _navigateToBoxing({
    required BoxingMode mode,
    required List<String> codes,
    required List<String> codesToClear,
    required bool clearLocation,
    String? returnMessage,
  }) async {
    await _refreshCurrentOverview();
    if (!mounted) return;
    final navigator = Navigator.of(context);
    await _stopScanListening();
    await navigator.push(
      MaterialPageRoute(
        builder: (_) => BoxingPage(
          arguments: BoxingPageArguments(
            initialMode: mode,
            autoScanCodes: codes,
          ),
        ),
      ),
    );
    if (!mounted) return;
    await Future<void>.delayed(const Duration(milliseconds: 120));
    if (!mounted) return;
    _restartScanListening();
    setState(() {
      _zongpaiNos.removeWhere((item) => codesToClear.contains(item));
      if (clearLocation) {
        _locationCode = null;
        _locationType = null;
      }
    });
    await _refreshCurrentOverview();
    if (!mounted) return;
    if (returnMessage != null) {
      _showStatusOverride(
        returnMessage,
        StatusDotColor.red,
        const Duration(seconds: 2),
      );
    }
  }
}