import 'dart:convert';
import 'label_document.dart';

class BarcodeTemplate {
  final int? id;
  final int? userId;
  final String templateName;
  final String? description;
  final String category;
  final int version;
  final double labelWidthMm;
  final double labelHeightMm;
  final String measurementUnit;
  final String printerLanguage;
  final int dpi;
  final String configurationJson;
  final String templateJson;
  final bool isActive;
  final DateTime? createdAt;
  final DateTime? updatedAt;

  BarcodeTemplate({
    this.id,
    this.userId,
    required this.templateName,
    this.description,
    this.category = 'PRODUCT',
    this.version = 1,
    this.labelWidthMm = 50.0,
    this.labelHeightMm = 25.0,
    this.measurementUnit = 'mm',
    this.printerLanguage = 'ZPL',
    this.dpi = 203,
    this.configurationJson = '{}',
    required this.templateJson,
    this.isActive = true,
    this.createdAt,
    this.updatedAt,
  });

  factory BarcodeTemplate.fromJson(Map<String, dynamic> json) {
    return BarcodeTemplate(
      id: json['id'] as int?,
      userId: json['userId'] as int?,
      templateName: json['templateName'] as String? ?? 'Untitled Template',
      description: json['description'] as String?,
      category: json['category'] as String? ?? 'PRODUCT',
      version: json['version'] as int? ?? 1,
      labelWidthMm: (json['labelWidthMm'] as num?)?.toDouble() ?? 50.0,
      labelHeightMm: (json['labelHeightMm'] as num?)?.toDouble() ?? 25.0,
      measurementUnit: json['measurementUnit'] as String? ?? 'mm',
      printerLanguage: json['printerLanguage'] as String? ?? 'ZPL',
      dpi: json['dpi'] as int? ?? 203,
      configurationJson: json['configurationJson'] as String? ?? '{}',
      templateJson: json['templateJson'] as String? ?? '{}',
      isActive: json['isActive'] as bool? ?? true,
      createdAt: json['createdAt'] != null ? DateTime.tryParse(json['createdAt'].toString()) : null,
      updatedAt: json['updatedAt'] != null ? DateTime.tryParse(json['updatedAt'].toString()) : null,
    );
  }

  Map<String, dynamic> toJson() => {
    if (id != null) 'id': id,
    if (userId != null) 'userId': userId,
    'templateName': templateName,
    'description': description,
    'category': category,
    'version': version,
    'labelWidthMm': labelWidthMm,
    'labelHeightMm': labelHeightMm,
    'measurementUnit': measurementUnit,
    'printerLanguage': printerLanguage,
    'dpi': dpi,
    'configurationJson': configurationJson,
    'templateJson': templateJson,
    'isActive': isActive,
  };

  LabelDocument toLabelDocument() {
    try {
      final parsed = jsonDecode(templateJson) as Map<String, dynamic>;
      return LabelDocument.fromJson(
        parsed,
        id: id?.toString(),
        name: templateName,
        description: description,
      );
    } catch (_) {
      return LabelDocument(
        id: id?.toString() ?? 'temp',
        name: templateName,
        description: description,
        version: version,
        config: LabelConfiguration(
          widthMm: labelWidthMm,
          heightMm: labelHeightMm,
          dpi: dpi,
          printerLanguage: printerLanguage,
        ),
      );
    }
  }

  static BarcodeTemplate fromLabelDocument({
    int? id,
    required LabelDocument doc,
  }) {
    return BarcodeTemplate(
      id: id,
      templateName: doc.name,
      description: doc.description,
      version: doc.version,
      labelWidthMm: doc.config.widthMm,
      labelHeightMm: doc.config.heightMm,
      measurementUnit: 'mm',
      printerLanguage: doc.config.printerLanguage,
      dpi: doc.config.dpi,
      configurationJson: jsonEncode(doc.config.toJson()),
      templateJson: doc.toJsonString(),
    );
  }
}