import { Rule, SchematicContext, Tree } from "@angular-devkit/schematics";
import { getImportModulePositions } from "../common/tsUtils";
import { UpdateChanges } from "../common/UpdateChanges";

const version = "6.0.1";

export default (): Rule => async (host: Tree, context: SchematicContext) => {
    context.logger.info(
        `Applying migration for Ignite UI for Angular to version ${version}`
    );

    const update = new UpdateChanges(__dirname, host, context);
    // update.applyChanges();

    // rename submodule imports
    for (const entryPath of update.tsFiles) {
        let content = host.read(entryPath).toString();
        if (content.indexOf("igniteui-angular-sovn/") !== -1) {
            const pos = getImportModulePositions(
                content,
                "igniteui-angular-sovn/"
            );
            for (let i = pos.length; i--; ) {
                content =
                    content.slice(0, pos[i].start) +
                    "igniteui-angular-sovn" +
                    content.slice(pos[i].end);
            }
            host.overwrite(entryPath, content);
        }
    }
};