import * as path from 'path';
import * as fs from 'fs';
import { FileUtils } from './FileUtils';

export default class ExtendsCode
{
    /** 删除没有扩展的文件 */
    static Delete(dir: string, lineNum: number = 10)
    {

        var paths = fs.readdirSync(dir); //同步读取当前目录
        
        for(var i = 0, len = paths.length; i < len; i ++)
        {
            var name = paths[i];
            
            var itemPath = path.join(dir, name);
            var stat = fs.lstatSync(itemPath);
            if(stat.isFile())
            {
                var content = fs.readFileSync(itemPath,  { encoding: "utf8"});
                var num = content.split('\n').length;
                if(num == lineNum)
                {
                    console.log("del: ", itemPath);
                    FileUtils.deleteFileOrDir(itemPath);
                }

            }
            else if(stat.isDirectory())
            {
                this.Delete(itemPath, lineNum);
            }
        }
    }

    /** 替换 */
    static Replace(dir: string)
    {
        var paths = fs.readdirSync(dir); //同步读取当前目录
        var dirName = path.basename(dir);
        
        for(var i = 0, len = paths.length; i < len; i ++)
        {
            var name = paths[i];
            
            var itemPath = path.join(dir, name);
            var stat = fs.lstatSync(itemPath);
            if(stat.isFile())
            {
                var clsname = name.split('.')[0];
                
                var a1 = `extends ${clsname}Struct`;
                var b1 = `extends fguistruct.${dirName}.${clsname}Struct`;

                
                var a2 = `import ${clsname}Struct from "../../Generates/${dirName}/${clsname}Struct";`;
                var b2 = "";


                // console.log("===============");
                // console.log(clsname);
                // console.log(itemPath);
                // console.log(a1, b1);
                // console.log(a2, b2);

                var content = fs.readFileSync(itemPath,  { encoding: "utf8"});
                content = content.replace(a1, b1).replace(a2, b2);
                fs.writeFileSync(itemPath, content, {flag: "w", encoding: "utf8"});


            }
            else if(stat.isDirectory())
            {
                this.Replace(itemPath);
            }
        }
    }
}