import { PassportStrategy } from '@nestjs/passport';
import { Injectable } from '@nestjs/common';
import { Strategy, VerifyCallback } from 'passport-google-oauth20';
import { ConfigService } from '@nestjs/config';
import { PersonaService } from './persona.service';

@Injectable()
export class GoogleStrategy extends PassportStrategy(Strategy, 'google') {
  constructor(
    private readonly personaService: PersonaService,
    private readonly config: ConfigService,
  ) {
    const clientID = config.get<string>('GOOGLE_CLIENT_ID');
    const clientSecret = config.get<string>('GOOGLE_CLIENT_SECRET');
    const callbackURL = config.get<string>('GOOGLE_CALLBACK_URL');

    if (!clientID || !clientSecret || !callbackURL) {
      throw new Error(
        'Las variables de entorno de Google OAuth no están definidas',
      );
    }

    super({
      clientID,
      clientSecret,
      callbackURL,
      scope: ['email', 'profile'],
      passReqToCallback: true,
    });
  }

  authorizationParams() {
    return {
      prompt: 'select_account',
    };
  }

  async validate(
    req: any,
    accessToken: string,
    refreshToken: string,
    profile: any,
    done: VerifyCallback,
  ): Promise<any> {
    try {
      const email = profile.emails?.[0]?.value || '';
      const nombre = profile.name?.givenName || '';
      const apellido = profile.name?.familyName || '';

      const user = await this.personaService.validateOrCreateGoogleUser({
        email,
        nombre,
        apellido,
      });

      done(null, user);
    } catch (error) {
      done(error, false);
    }
  }
}