import * as path from 'path';
import * as fs from 'fs-extra';

export class DXProjectManifestUtils {
    private sfdxProjectManifestJSON: any;

    public constructor(private projectFolder: string) {}

    public removePackagesNotInDirectory(): void {
        //Validate projectJson Path
        let sfdxProjectManifestPath = path.join(this.projectFolder, 'sfdx-project.json');

        if (!fs.existsSync(sfdxProjectManifestPath))
            throw new Error(`sfdx-project.json doesn't exist at ${sfdxProjectManifestPath}`);

        // Read sfdx-projec.json
        const sfdxProjectManifest = fs.readFileSync(sfdxProjectManifestPath, 'utf8');
        this.sfdxProjectManifestJSON = JSON.parse(sfdxProjectManifest);

        //Filter sfdx-project.json of unwanted directories
        this.sfdxProjectManifestJSON.packageDirectories = this.sfdxProjectManifestJSON.packageDirectories.filter((el) =>
            this.isElementExists(el)
        );

        //write back sfdx-project.json back
        fs.writeJSONSync(sfdxProjectManifestPath, this.sfdxProjectManifestJSON);
    }

    private isElementExists(element) {
        return fs.existsSync(path.join(this.projectFolder, element.path));
    }
}