import { Rule, SchematicContext, Tree } from "@angular-devkit/schematics";
import { getProjects, getWorkspace } from "../common/util";

const version = "6.0.2";

export default (): Rule => async (host: Tree, context: SchematicContext) => {
    const themeImport = "~igniteui-angular-sovn/core/styles/themes";
    const newThemeImport = "~igniteui-angular-sovn/lib/core/styles/themes";
    const config = getWorkspace(host);
    const projects = getProjects(config);

    context.logger.info(
        `Applying migration for Ignite UI for Angular to version ${version}`
    );

    for (const proj of projects) {
        const dir = host.getDir(proj.sourceRoot);
        dir.visit((path, entry) => {
            if (path.endsWith(".scss")) {
                let content = entry.content.toString();
                if (content.indexOf(themeImport) !== -1) {
                    content = content.replace(themeImport, newThemeImport);
                    host.overwrite(path, content);
                }
            }
        });
    }
};