/*!
 * @license
 * Copyright © 2005-2024 Hyland Software, Inc. and its affiliates. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { ModuleWithProviders, NgModule } from '@angular/core';
import { Routes, provideRoutes, Route } from '@angular/router';
import { SHELL_LAYOUT_ROUTE } from './shell.routes';
import { ShellLayoutComponent } from './components/shell/shell.component';

export interface AppShellRoutesConfig {
    shellParentRoute?: Route;
    shellChildren: Routes;
}

@NgModule({
    imports: [ShellLayoutComponent],
    exports: [ShellLayoutComponent]
})
export class ShellModule {
    static withRoutes(routes: Routes | AppShellRoutesConfig): ModuleWithProviders<ShellModule> {
        if (Array.isArray(routes)) {
            return getModuleForRoutes(routes);
        }

        return getModuleForRouteConfig(routes);
    }
}

/**
 * Resolve module for routes
 *
 * @param routes route configuration
 * @returns module with providers
 */
function getModuleForRoutes(routes: Routes): ModuleWithProviders<ShellModule> {
    const shellLayoutRoute = SHELL_LAYOUT_ROUTE;

    routes.forEach((childRoute) => {
        shellLayoutRoute.children.push(childRoute);
    });

    return {
        ngModule: ShellModule,
        providers: provideRoutes([shellLayoutRoute])
    };
}

/**
 * Resolve a module for the route configuration
 *
 * @param config route configuration
 * @returns module with providers
 */
function getModuleForRouteConfig(config: AppShellRoutesConfig): ModuleWithProviders<ShellModule> {
    const shellLayoutRoute = SHELL_LAYOUT_ROUTE;

    const shellParentRoute = config.shellParentRoute;
    const shellChildrenRoutes = config.shellChildren;

    shellLayoutRoute.children.push(...shellChildrenRoutes);

    const rootRoute = shellParentRoute ? shellParentRoute : shellLayoutRoute;

    if (config.shellParentRoute) {
        if (rootRoute.children === undefined) {
            rootRoute.children = [];
        }

        rootRoute.children.push(shellLayoutRoute);
    }

    return {
        ngModule: ShellModule,
        providers: provideRoutes([rootRoute])
    };
}