import 'dart:io';
import 'utils.dart';

/// 自动生成外部使用的图标封装文件
///
/// 从 iconfont.json 文件读取图标信息，生成 FontIcons 封装类
/// 生成位置：项目根目录的 icons.dart
void main() {
  final iconData = readIconFontJson();
  final glyphs = getGlyphs(iconData);
  final definedIcons = getDefinedIconNames();

  _generateWrapperFile(glyphs, definedIcons);

  print('✅ 外部图标封装文件生成成功: \x1B[32mgenerate/icons.dart\x1B[0m');
  print('📊 共生成 ${definedIcons.length} 个图标常量');
}

/// 生成 icons.dart 文件
void _generateWrapperFile(List<dynamic> glyphs, Set<String> definedIcons) {
  final buffer = StringBuffer();
  
  // 文件头部
  buffer.writeln("// ignore_for_file: constant_identifier_names");
  buffer.writeln();
  buffer.writeln("import 'package:flutter/material.dart';");
  buffer.writeln("import 'package:yx_icon_fonts/yx_icon_fonts.dart';");
  buffer.writeln();
  buffer.writeln("class FontIcons {");
  buffer.writeln("  // 私有构造函数，防止实例化");
  buffer.writeln("  FontIcons._();");
  buffer.writeln();

  // 按类别分组图标
  final categories = _categorizeIcons(glyphs, definedIcons);
  
  // 定义类别显示顺序
  final categoryOrder = [
    '其他图标',
    '编辑相关图标',
    '删除相关图标',
    '个人中心相关图标',
    '消息相关图标',
    '箭头相关图标',
    '特殊字符图标',
    '团队和用户相关图标',
    '功能图标',
    '退出相关图标',
    '更多和菜单相关图标',
    '复制相关图标',
    '日历相关图标',
    '分享相关图标',
    '添加相关图标',
    '键盘相关图标',
  ];

  // 按顺序生成图标
  for (final category in categoryOrder) {
    if (categories.containsKey(category) && categories[category]!.isNotEmpty) {
      buffer.writeln("  // $category");
      for (final iconName in categories[category]!) {
        buffer.writeln("  static const IconData $iconName = YXIconFonts.$iconName;");
      }
      buffer.writeln();
    }
  }

  buffer.writeln("}");

  // 确保 generate 目录存在
  final dir = Directory('generate');
  if (!dir.existsSync()) {
    dir.createSync(recursive: true);
  }

  // 写入文件
  final file = File('generate/icons.dart');
  file.writeAsStringSync(buffer.toString());
}

/// 将图标按类别分组
Map<String, List<String>> _categorizeIcons(List<dynamic> glyphs, Set<String> definedIcons) {
  final categories = <String, List<String>>{};
  
  for (final glyph in glyphs) {
    final name = glyph['font_class'] as String;
    final camelCaseName = toLegalDartName(name);
    
    // 跳过未定义的图标
    if (!definedIcons.contains(camelCaseName)) continue;
    
    // 确定类别
    String category = _getCategory(name);
    
    categories.putIfAbsent(category, () => []);
    categories[category]!.add(camelCaseName);
  }
  
  return categories;
}

/// 根据图标名称确定类别
String _getCategory(String name) {
  final lowerName = name.toLowerCase();
  
  if (lowerName.contains('edit')) {
    return '编辑相关图标';
  } else if (lowerName.contains('delete')) {
    return '删除相关图标';
  } else if (lowerName.contains('me_')) {
    return '个人中心相关图标';
  } else if (lowerName.contains('msg')) {
    return '消息相关图标';
  } else if (lowerName.contains('arrow')) {
    return '箭头相关图标';
  } else if (lowerName == '24_-' || lowerName.contains('subtract')) {
    return '特殊字符图标';
  } else if (lowerName.contains('team') || lowerName.contains('student')) {
    return '团队和用户相关图标';
  } else if (lowerName.contains('filter') || 
             lowerName.contains('question') || 
             lowerName.contains('onlysee') || 
             lowerName.contains('hint') || 
             lowerName.contains('switch')) {
    return '功能图标';
  } else if (lowerName.contains('quit')) {
    return '退出相关图标';
  } else if (lowerName.contains('more')) {
    return '更多和菜单相关图标';
  } else if (lowerName.contains('copy')) {
    return '复制相关图标';
  } else if (lowerName.contains('calendar')) {
    return '日历相关图标';
  } else if (lowerName.contains('share')) {
    return '分享相关图标';
  } else if (lowerName.contains('add') || lowerName.contains('+') || lowerName.contains('plus')) {
    return '添加相关图标';
  } else if (lowerName.contains('keyboard')) {
    return '键盘相关图标';
  } else {
    return '其他图标';
  }
}