import { Injectable } from '@nestjs/common';
import { ConfigService as NestConfigService } from '@nestjs/config';
import type { AppConfig, NodeEnv } from './config.types';

@Injectable()
export class AppConfigService {
  private readonly config: AppConfig;

  constructor(private readonly nestConfig: NestConfigService<AppConfig, true>) {
    this.config = {
      nodeEnv: this.nestConfig.getOrThrow('nodeEnv', { infer: true }),
      port: this.nestConfig.getOrThrow('port', { infer: true }),
      appBaseUrl: this.nestConfig.getOrThrow('appBaseUrl', { infer: true }),
      frontendBaseUrl: this.nestConfig.getOrThrow('frontendBaseUrl', {
        infer: true,
      }),
      trustProxy: this.nestConfig.getOrThrow('trustProxy', { infer: true }),
      database: this.nestConfig.getOrThrow('database', { infer: true }),
      oidc: this.nestConfig.getOrThrow('oidc', { infer: true }),
      session: this.nestConfig.getOrThrow('session', { infer: true }),
      corsOrigins: this.nestConfig.getOrThrow('corsOrigins', { infer: true }),
      csrfHeaderName: this.nestConfig.getOrThrow('csrfHeaderName', {
        infer: true,
      }),
      logLevel: this.nestConfig.getOrThrow('logLevel', { infer: true }),
      swaggerEnabled: this.nestConfig.getOrThrow('swaggerEnabled', {
        infer: true,
      }),
      documents: this.nestConfig.getOrThrow('documents', { infer: true }),
      reminders: this.nestConfig.getOrThrow('reminders', { infer: true }),
      rateLimit: this.nestConfig.getOrThrow('rateLimit', { infer: true }),
    };
  }

  get nodeEnv(): NodeEnv {
    return this.config.nodeEnv;
  }

  get isProduction(): boolean {
    return this.config.nodeEnv === 'production';
  }

  get port(): number {
    return this.config.port;
  }

  get appBaseUrl(): string {
    return this.config.appBaseUrl;
  }

  get frontendBaseUrl(): string {
    return this.config.frontendBaseUrl;
  }

  get trustProxy(): boolean {
    return this.config.trustProxy;
  }

  get database(): AppConfig['database'] {
    return this.config.database;
  }

  get oidc(): AppConfig['oidc'] {
    return this.config.oidc;
  }

  get session(): AppConfig['session'] {
    return this.config.session;
  }

  get corsOrigins(): string[] {
    return this.config.corsOrigins;
  }

  get csrfHeaderName(): string {
    return this.config.csrfHeaderName;
  }

  get logLevel(): string {
    return this.config.logLevel;
  }

  get swaggerEnabled(): boolean {
    return this.config.swaggerEnabled;
  }

  get documents(): AppConfig['documents'] {
    return this.config.documents;
  }

  get reminders(): AppConfig['reminders'] {
    return this.config.reminders;
  }

  get rateLimit(): AppConfig['rateLimit'] {
    return this.config.rateLimit;
  }

  /**
   * @deprecated Use rateLimit.global.windowSeconds.
   */
  get rateLimitWindowSeconds(): number {
    return this.config.rateLimit.global.windowSeconds;
  }

  /**
   * @deprecated Use rateLimit.global.maxRequests.
   */
  get rateLimitMaxRequests(): number {
    return this.config.rateLimit.global.maxRequests;
  }
}