'user strict';

import * as vscode from 'vscode';
import { TreeDataProvider, TreeItem, EventEmitter, Event } from "vscode";
import { RhamtModelService } from "raas-core";

export class RhamtTreeDataProvider implements TreeDataProvider<any>, vscode.Disposable {

    private _onDidChangeTreeData: EventEmitter<any> = new EventEmitter<any>();
    readonly onDidChangeTreeData: Event<any> = this._onDidChangeTreeData.event;
    
    constructor(private context: vscode.ExtensionContext,
        private modelService: RhamtModelService) {
        this.context.subscriptions.push(this);
        console.log('modelService config count: ' + this.modelService.getConfiguration);
    }

    public refresh(): any {
		this._onDidChangeTreeData.fire();
    }
    
    public dispose(): void {
    }

    public getTreeItem(element: any): TreeItem {
		// if (element instanceof RhamtConfiguration) {
        //     return new RhamtConfigurationNode(element);
        // }
        // return {
        //     label: 'unknown'
        // };
        return new TreeItem('');
    }

    public async getChildren(element?: any): Promise<any[]> {

        let result: any[];

        if (!element) {
            result = await this.populateRoots();
        }
        else {
            return new Promise<any>(resolve => {
                resolve([]);
            });
        }
        return result;
    }

    private async populateRoots(): Promise<any[]> {
        return Promise.resolve([]);
        // let roots: any[] = [];
        // if (!this.modelService.initialized) {
        //     roots = [new AzureNode(undefined, {
        //         label: this._azureAccount.status === 'Initializing' ? localize('loadingNode', 'Loading...') : localize('signingIn', 'Waiting for Azure sign-in...'),
        //         commandId: signInCommandId,
        //         contextValue: 'azureCommandNode',
        //         id: signInCommandId,
        //         iconPath: {
        //             light: path.join(__filename, '..', '..', '..', '..', 'resources', 'light', 'Loading.svg'),
        //             dark: path.join(__filename, '..', '..', '..', '..', 'resources', 'dark', 'Loading.svg')
        //         }
        //     })];
        // }
        // else {

        // }
        
        // return roots;
        // return new Promise<RhamtConfiguration[]>(resolve => {
        //     this.modelService.init().catch((e) => {
        //         console.error(e);
        //         vscode.window.showErrorMessage('rhamt model initlialization error: ' + e);
        //     }).then(() => resolve(this.modelService.model.getConfigurations()));
        // });
    }
}