import { Request, Response } from 'express';
import { DyFM_HttpCallType } from '@futdevpro/fsm-dynamo';
import { DyNTS_Controller } from '../../../_services/route/controller.service';
import { DyNTS_Endpoint_Params } from '../../../_models/control-models/endpoint-params.control-model';
import { DyNTS_OAuth2_AuthService } from '../_services/oauth2.auth-service';
import { DyNTS_OAuth2_ControlService } from '../_services/oauth2.control-service';

/**
 * OAuth2 Controller implementation
 * 
 * This controller handles OAuth2 specific endpoints and authentication flows
 * 
 * @example
 * const oauth2Controller = DyNTS_OAuth2_Controller.getInstance();
 * oauth2Controller.setupEndpoints();
 */
export class DyNTS_OAuth2_Controller extends DyNTS_Controller {
  static getInstance(): DyNTS_OAuth2_Controller {
    return DyNTS_OAuth2_Controller.getSingletonInstance();
  }

  private readonly authService: DyNTS_OAuth2_AuthService = DyNTS_OAuth2_AuthService.getInstance();
  private readonly controlService: DyNTS_OAuth2_ControlService = DyNTS_OAuth2_ControlService.getInstance();

  setupEndpoints(): void {
    this.endpoints = [
      new DyNTS_Endpoint_Params({
        name: 'authorize',
        type: DyFM_HttpCallType.get,
        endpoint: '/oauth2/authorize',
        tasks: [
          async (req: Request, res: Response): Promise<void> => {
            // TODO: Implement OAuth2 authorization endpoint
            // 1. Validate client_id and redirect_uri
            // 2. Check if user is already authenticated
            // 3. If not authenticated, redirect to login page
            // 4. If authenticated, show consent page
            // 5. Handle user consent
            // 6. Generate authorization code or access token
            // 7. Redirect back to client with code/token
            await this.controlService.handleAuthorizationRequest(req, res);
          },
        ],
      }),

      new DyNTS_Endpoint_Params({
        name: 'token',
        type: DyFM_HttpCallType.post,
        endpoint: '/oauth2/token',
        tasks: [
          async (req: Request, res: Response): Promise<void> => {
            // TODO: Implement OAuth2 token endpoint
            // 1. Validate client credentials
            // 2. Handle different grant types:
            //    - authorization_code
            //    - refresh_token
            //    - client_credentials
            //    - password
            // 3. Generate appropriate tokens
            // 4. Return token response
            await this.controlService.handleTokenRequest(req, res);
          },
        ],
      }),

      new DyNTS_Endpoint_Params({
        name: 'userinfo',
        type: DyFM_HttpCallType.get,
        endpoint: '/oauth2/userinfo',
        preProcesses: [this.authService.authenticate_token],
        tasks: [
          async (req: Request, res: Response): Promise<void> => {
            // TODO: Implement OAuth2 userinfo endpoint
            // 1. Extract user information from token
            // 2. Validate token scope
            // 3. Return user information based on scope
            await this.controlService.handleUserInfoRequest(req, res);
          },
        ],
      }),

      new DyNTS_Endpoint_Params({
        name: 'revoke',
        type: DyFM_HttpCallType.post,
        endpoint: '/oauth2/revoke',
        preProcesses: [this.authService.authenticate_token],
        tasks: [
          async (req: Request, res: Response): Promise<void> => {
            // TODO: Implement OAuth2 token revocation endpoint
            // 1. Validate token
            // 2. Revoke token and any associated refresh tokens
            // 3. Clear token from storage/cache
            await this.controlService.handleTokenRevocation(req, res);
          },
        ],
      }),
    ];
  }
}