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

const version = "8.2.6";

export default (): Rule => async (host: Tree, context: SchematicContext) => {
    const themes = [
        "$_base-dark-grid-pagination",
        "$_dark-grid-pagination",
        "$_dark-fluent-grid-pagination",
        "$_light-grid-pagination",
        "$_fluent-grid-pagination",
        "$_round-shape-grid-pagination",
        "$_default-shape-grid-pagination",
        "$_square-shape-grid-pagination",
    ];

    const newThemes = [
        "$_base-dark-pagination",
        "$_dark-pagination",
        "$_dark-fluent-pagination",
        "$_light-pagination",
        "$_fluent-pagination",
        "$_round-shape-pagination",
        "$_default-shape-pagination",
        "$_square-shape-pagination",
    ];

    const gridPaginatorComponentImport =
        "~igniteui-angular-sovn/lib/core/styles/components/grid-paginator/grid-paginator-component";
    const gridPaginatorThemeImport =
        "~igniteui-angular-sovn/lib/core/styles/components/grid-paginator/grid-paginator-theme";
    const paginatorComponentImport =
        "~igniteui-angular-sovn/lib/core/styles/components/paginator/paginator-component";
    const paginatorThemeImport =
        "~igniteui-angular-sovn/lib/core/styles/components/paginator/paginator-theme";
    const config = getWorkspace(host);
    const projects = getProjects(config);

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

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

    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.match(/\bigx-grid-paginator\b/g)) {
                    content = content.replace(
                        /\bigx-grid-paginator\b/g,
                        "igx-paginator"
                    );
                }
                themes.forEach((n, i) => {
                    if (content.indexOf(n) !== -1) {
                        content = content.split(n).join(newThemes[i]);
                    }
                });
                if (content.indexOf(gridPaginatorComponentImport) !== -1) {
                    content = content.replace(
                        gridPaginatorComponentImport,
                        paginatorComponentImport
                    );
                    host.overwrite(path, content);
                }
                if (content.indexOf(gridPaginatorThemeImport) !== -1) {
                    content = content.replace(
                        gridPaginatorThemeImport,
                        paginatorThemeImport
                    );
                    host.overwrite(path, content);
                }
                host.overwrite(path, content);
            }
        });
    }

    update.applyChanges();
};