let path = require('path')

let fs = require('fs');

let fileExtensionToImage: object;

export class Configurator {

    fileutils: FileUtils = new FileUtils();

    getFileExtensionToImageMap(): Object {
        if (!fileExtensionToImage) {
            fileExtensionToImage = this.loadConfigMap("file-extensions.json");
        }
        return fileExtensionToImage;
    };

    loadConfigMap(fileName: string): object {
        let filePath = this.fileutils.getPathToConfig(fileName);
        let fileBuffer = fs.readFileSync(filePath);
        let content = fileBuffer.toString('utf8')
        return JSON.parse(content)
    }


}

export class FileUtils {
    getPathToView(templateName: string): string {
        return path.join(this.getPathToAssets(), "views", templateName + ".html")
    }

    getPathToImage(imageName: string): string {
        return path.join(this.getPathToAssets(), "images", imageName)
    }

    getPathToDocument(documentName: string): string {
        return path.join(this.getPathToAssets(), "documents", documentName)
    }

    getPathToConfig(documentName: string): string {
        return path.join(this.getPathToAssets(), "conf", documentName)
    }

    getPathToAssets(): string {
        return path.join(__dirname, "..", "assets");
    }

    getFileExtension(fileName: string): string {
        return fileName.substr(fileName.lastIndexOf(".")+1)
    }
}