import { Injectable, UnauthorizedException } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { PassportStrategy } from '@nestjs/passport';
import { ExtractJwt, Strategy } from 'passport-jwt';

import { HttpErrorCode } from '../../../common/error-code';
import { Environment } from '../../../config/env.validation';
import { AccessPayload } from '../application/auth.types';

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  constructor(config: ConfigService<Environment, true>) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      ignoreExpiration: false,
      secretOrKey: config.getOrThrow('JWT_SECRET'),
      algorithms: ['HS256'],
    });
  }

  validate(payload: AccessPayload): AccessPayload {
    if (payload.type !== 'access') {
      throw new UnauthorizedException({ code: HttpErrorCode.Unauthorized });
    }
    return payload;
  }
}