import * as plugins from './nullresolve.plugins.js';
import * as paths from './nullresolve.paths.js';
import { configObject } from './nullresolve.config.js';
import type { IHtmlInfoOptions } from '@api.global/typedserver/infohtml';

export interface INullResolveOptions {
  port?: number;
  serviceDomain?: string;
}

type TResolvedNullResolveOptions = INullResolveOptions & {
  serviceDomain: string;
};

export class NullResolve {
  public serviceServer: plugins.typedserver.utilityservers.UtilityServiceServer | null = null;
  private options: TResolvedNullResolveOptions;

  constructor(optionsArg: INullResolveOptions = {}) {
    this.options = {
      serviceDomain: 'nullresolve.lossless.one',
      ...optionsArg,
    };
  }

  private async createInfoHtmlResponse(
    infoHtmlOptionsArg: IHtmlInfoOptions,
  ) {
    const { InfoHtml } = await import('@api.global/typedserver/infohtml');
    const infoHtmlInstance = await InfoHtml.fromOptions(infoHtmlOptionsArg);
    return new Response(infoHtmlInstance.htmlString, {
      status: 200,
      headers: {
        'content-type': 'text/html; charset=utf-8',
      },
    });
  }

  private getStatusInfoOptions(statusCodeArg: string): IHtmlInfoOptions {
    switch (statusCodeArg) {
      case 'ipblock':
        return {
          title: 'Lossless Network: Blocked IP',
          heading: 'Blocked IP',
          text: 'Your IP (::CLIENT_IP::) is not allowed to access this resource.',
          sentryDsn: configObject.sentryDsn,
          sentryMessage: 'ipblock',
          redirectTo: 'https://lossless.com',
        };
      case 'firewall':
        return {
          title: 'Lossless Network: Firewall',
          heading: 'Firewall',
          text: 'Your request has been blocked by our firewall since it showed possibly harmful behaviour.',
          sentryDsn: configObject.sentryDsn,
          sentryMessage: 'firewall',
          redirectTo: 'https://lossless.com',
        };
      case '500class':
        return {
          title: 'Lossless Network: 5xx',
          heading: '5xx',
          text: '::CLOUDFLARE_ERROR_500S_BOX::',
          sentryDsn: configObject.sentryDsn,
          sentryMessage: '5xx error',
          redirectTo: 'https://lossless.com',
        };
      case '1000class':
        return {
          title: 'Lossless Network: DNS Resolution failed',
          heading: '1xxx',
          text: '::CLOUDFLARE_ERROR_1000S_BOX::',
          sentryDsn: configObject.sentryDsn,
          sentryMessage: '1000 class error',
          redirectTo: 'https://lossless.com',
        };
      case 'alwaysonline':
        return {
          title: 'Lossless Network: No Cache',
          heading: 'No Cache',
          text: '::ALWAYS_ONLINE_NO_COPY_BOX::',
          sentryDsn: configObject.sentryDsn,
          sentryMessage: 'alwaysonline triggered. Potentially offline!',
          redirectTo: 'https://lossless.com',
        };
      case 'waf':
        return {
          title: 'Lossless Network: Firewall Challenge',
          heading: 'Firewall Challenge',
          text: '::CAPTCHA_BOX::',
          redirectTo: 'https://lossless.com',
        };
      case 'country':
        return {
          title: 'Lossless Network: Country Challenge',
          heading: 'Country Challenge',
          text: '::CAPTCHA_BOX::',
          redirectTo: 'https://lossless.com',
        };
      case 'attack':
        return {
          title: 'Lossless Network: Advanced User Challenge',
          heading: 'Advanced User Challenge',
          text: '::IM_UNDER_ATTACK_BOX::',
          redirectTo: 'https://lossless.com',
        };
      default: {
        const statusInstance = plugins.smartstatus.HttpStatus.getHttpStatusByString(statusCodeArg);
        return {
          title: `Lossless Network: ${statusInstance.code.toString()}`,
          heading: statusInstance.code.toString(),
          text: statusInstance.text,
        };
      }
    }
  }

  private async addCustomRoutes(typedServerArg: plugins.typedserver.TypedServer) {
    typedServerArg.addRoute('/status/:code', 'GET', async (ctxArg) => {
      return this.createInfoHtmlResponse(this.getStatusInfoOptions(ctxArg.params.code));
    });

    typedServerArg.addRoute('/custom', 'GET', async (ctxArg) => {
      const options = {
        title: ctxArg.query.title || 'Lossless Network',
        heading: ctxArg.query.heading || 'Error!',
        text: ctxArg.query.text || 'Please wait...',
        redirectTo: ctxArg.query.redirectTo || 'https://lossless.com',
      };

      return this.createInfoHtmlResponse({
        ...options,
        sentryDsn: configObject.sentryDsn,
        sentryMessage: `nullresolve custom: ${options.title}`,
      });
    });
  }

  public async start() {
    if (this.serviceServer) {
      return;
    }

    const projectinfo = await plugins.projectinfo.ProjectInfo.create(paths.packageDir);
    this.serviceServer = new plugins.typedserver.utilityservers.UtilityServiceServer({
      serviceDomain: this.options.serviceDomain,
      serviceName: 'nullresolve',
      serviceVersion: projectinfo.npm.version,
      port: this.options.port,
      addCustomRoutes: async (typedServerArg) => this.addCustomRoutes(typedServerArg),
    });
    await this.serviceServer.start();
  }

  public async stop() {
    if (!this.serviceServer) {
      return;
    }
    await this.serviceServer.stop();
    this.serviceServer = null;
  }
}