import 'package:fis_lib_report/converts/event_type.dart';
import 'package:fis_lib_report/report/element_tag.dart';
import 'package:fis_lib_report/report/element_type.dart';
import 'package:fis_lib_report/report/inputImageList.dart';
import 'package:fis_lib_report/report/interfaces/block_element.dart';
import 'package:fis_lib_report/report/interfaces/element.dart';
import 'package:fis_lib_report/report/paragraph.dart';
import 'package:fis_lib_report/report/report_template_document.dart';
import 'package:fis_lib_report/report/rt_page_size.dart';
import 'package:fis_lib_report/report/rt_table.dart';
import 'package:fis_lib_report/report_info/block_element_info_interface.dart';
import 'package:fis_lib_report/report_info/element_info.dart';
import 'package:fis_lib_report/report_info/input_image_info.dart';
import 'package:fis_lib_report/report_info/input_image_list_info.dart';
import 'package:fis_lib_report/report_info/paragraph_info.dart';
import 'package:fis_lib_report/report_info/rt_table_info.dart';

class ReportInfo {
  static ReportInfo? _reportInfo;
  List<IBlockElementInfo> blocks = [];
  List<IBlockElementInfo> headers = [];
  List<IBlockElementInfo> footers = [];

  /// Gets the author of the report template.
  String? author;

  /// Gets or sets the value to indicate whether the report template is created by user.
  bool? isCustom;

  /// Gets the report template name.
  String? name;

  /// Gets the custom input element tags of the report template.
  Map<String, ElementTag>? tags;

  /// Gets or sets the update time.
  DateTime? updateTime;

  ///version
  String? version;

  /// Gets the id.
  String? id;

  ReportInfo._internal();

  RTPageSize? pageSize;

  double currentHeight = 0;

  String? reporter;

  DateTime? reportDate;

  ReportTemplateDocument? reportTemplate;

  FEventHandler<ReportEventArgs> onReload = FEventHandler();

  static ReportInfo get instance {
    _reportInfo ??= ReportInfo._internal();
    return _reportInfo!;
  }

  void init(ReportTemplateDocument reportTemplate, DateTime reportDate,
      String reporter) {
    try {
      this.reportTemplate = reportTemplate;
      this.reportDate = reportDate;
      this.reporter = reporter;
      isCustom = reportTemplate.isCustom;
      name = reportTemplate.name;
      updateTime = reportTemplate.updateTime;
      version = reportTemplate.version;
      id = reportTemplate.id;
      for (var element in reportTemplate.header!) {
        headers.add(_initBlockElement(element));
      }
      for (var element in reportTemplate.blocks!) {
        blocks.add(_initBlockElement(element));
      }
      for (var element in reportTemplate.footer!) {
        footers.add(_initBlockElement(element));
      }
      pageSize = reportTemplate.pageSize;
    } catch (e) {
      print(e);
    }
  }

  ///重新渲染UI&重构reportInfo
  void reload(String reporter, DateTime reportDate, String jsonStr,
      FEventHandler<String> onSelect) {
    _reportInfo = null;
    onReload.emit(
        this, ReportEventArgs(reportDate, reporter, jsonStr, onSelect));
  }

  IBlockElementInfo? getBlockElement(IBlockElement block) {
    final id = block.id;
    for (var element in headers) {
      if (element.id == id) {
        return element;
      }
    }
    for (var element in blocks) {
      if (element.id == id) {
        return element;
      }
    }
    for (var element in footers) {
      if (element.id == id) {
        return element;
      }
    }
  }

  IBlockElementInfo _initBlockElement(IBlockElement element) {
    final _type = element.elementType!;
    if (_type.name == ElementType.rtTable!.name) {
      final table = element as RTTable;
      return RTTableInfo.fromElement(table);
    } else if (_type.name == ElementType.paragraph!.name) {
      final paragraph = element as Paragraph;
      return ParagraphInfo.fromElement(paragraph);
    } else {
      final inputImageList = element as InputImageList;
      return InputImageListInfo.fromElement(inputImageList);
    }
  }

  void selectedInputImage(String imageUrl) {
    for (var element in headers) {
      if (_checkImageisSelected(element, imageUrl)) {
        return;
      }
    }
    for (var element in blocks) {
      if (_checkImageisSelected(element, imageUrl)) {
        return;
      }
    }
    for (var element in footers) {
      if (_checkImageisSelected(element, imageUrl)) {
        return;
      }
    }
  }

  ElementInfo? getElementInfo(IElement element) {
    try {
      for (var e in headers) {
        final elementInfo = _getBaseElementInfo(e, element);
        if (elementInfo != null) {
          return elementInfo;
        }
      }
      for (var e in blocks) {
        final elementInfo = _getBaseElementInfo(e, element);
        if (elementInfo != null) {
          return elementInfo;
        }
      }
      for (var e in footers) {
        final elementInfo = _getBaseElementInfo(e, element);
        if (elementInfo != null) {
          return elementInfo;
        }
      }
    } catch (e) {
      print(e);
    }
    return null;
  }

  bool _checkImageisSelected(IBlockElementInfo block, String url) {
    if (block is InputImageListInfo) {
      final inputImage = block;
      if (inputImage.isSelected ?? false) {
        inputImage.addImage(url);
        return true;
      }
    } else if (block is ParagraphInfo) {
      for (var el in block.elementInfos!) {
        if (el is InputImageInfo) {
          final image = el;
          if (image.isSelected!) {
            image.addImage(url);
            return true;
          }
        }
      }
    }
    return false;
  }

  ElementInfo? _getBaseElementInfo(IBlockElementInfo block, IElement element) {
    ElementInfo? result;
    final type = block.elementType;
    if (type!.name == ElementType.paragraph!.name) {
      final paragraph = block as ParagraphInfo;
      for (var el in paragraph.elementInfos!) {
        if (el.id == element.id) {
          result = el;
          break;
        }
      }
    }
    if (result == null) {
      if (type.name == ElementType.rtTable!.name) {
        final table = block as RTTableInfo;
        final cells = table.cells!;
        for (var cell in cells.values) {
          for (var b in cell.blocks!) {
            final info = _getBaseElementInfo(b, element);
            if (info != null) {
              result = info;
              break;
            }
          }
        }
      }
    }

    return result;
  }
}

class ReportEventArgs {
  final FEventHandler<String> onSelect;

  final String jsonStr;
  final String reporter;
  final DateTime reportDate;
  ReportEventArgs(this.reportDate, this.reporter, this.jsonStr, this.onSelect);
}