import {HttpMethod} from '../net/http/HttpMethod';
import type {PCastHttpRequests} from './PCastRequests';
import type {PublishingReportResponse, ViewingReportResponse} from './IResponse';
import assertUnreachable from '../lang/assertUnreachable';

export enum ReportKind {
  Publishing = 0,
  Viewing = 1
}

export type ReportKindType = 'Publishing' | 'Viewing';

export class ReportKindMapping {
  public static convertReportKindTypeToReportKind(reportKindType: ReportKindType): ReportKind {
    switch (reportKindType) {
      case 'Publishing':
        return ReportKind.Publishing;
      case 'Viewing':
        return ReportKind.Viewing;

      default:
        assertUnreachable(reportKindType);
    }
  }

  public static convertReportKindToReportKindType(reportKind: ReportKind): ReportKindType {
    switch (reportKind) {
      case ReportKind.Publishing:
        return 'Publishing';
      case ReportKind.Viewing:
        return 'Viewing';

      default:
        assertUnreachable(reportKind);
    }
  }
}

export type PublishingReportOptions = {
  applicationIds?: string[];
  streamIds?: string[];
  channelIds?: string[];
  channelAliases?: string[];
  roomIds?: string[];
  roomAliases?: string[];
  tags?: string[];
  start: string;
  end: string;
};

export enum ViewingReportKind {
  RealTime = 0,
  HLS = 1,
  DASH = 2
}

export type ViewingReportKindType = 'RealTime' | 'HLS' | 'DASH';

export type ViewingReportOptions = {
  kind: ViewingReportKind;
  applicationIds?: string[];
  streamIds?: string[];
  sessionIds?: string[];
  originStreamIds?: string[];
  originTags?: string[];
  channelIds?: string[];
  channelAliases?: string[];
  roomIds?: string[];
  roomAliases?: string[];
  tags?: string[];
  start: string;
  end: string;
};

export class Reporting {
  private readonly _httpRequests: PCastHttpRequests;

  constructor(httpRequests: PCastHttpRequests) {
    this._httpRequests = httpRequests;
  }

  public async generateReport<ReportOptions extends PublishingReportOptions | ViewingReportOptions>(kind: ReportKind, options: ReportOptions): Promise<string> {
    console.log('[Reporting] generateReport [%o]', ReportKindMapping.convertReportKindToReportKindType(kind));

    if (kind === ReportKind.Publishing) {
      return this.requestPublishingReport(options as PublishingReportOptions);
    }

    if (kind === ReportKind.Viewing) {
      return this.requestViewingReport(options as ViewingReportOptions);
    }

    throw new Error(`[Reporting] Unsupported report kind: ${kind}`);
  }

  public async requestPublishingReport(options: PublishingReportOptions): Promise<string> {
    if (!(options.start || options.end)) {
      throw new Error('[Reporting] [requestPublishingReport] requires a start and end Date');
    }
    const publishingReportOptions = {
      ...options
    };

    const requestPublishingOptions = {
      body: JSON.stringify({publishingReport: publishingReportOptions})
    };
    const response = await this._httpRequests.request<PublishingReportResponse>(HttpMethod.PUT, '/pcast/reporting/publishing', requestPublishingOptions);

    if (!response.publishingReport) {
      throw new Error('[Reporting] [requestPublishingReport] Invalid response format - missing publishingReport data');
    }

    return response.publishingReport;
  }

  private async requestViewingReport(options: ViewingReportOptions): Promise<string> {
    const viewingReportOptions = {
      ...options
    };

    const requestViewingOptions = {
      body: JSON.stringify({viewingReport: viewingReportOptions})
    };

    const response = await this._httpRequests.request<ViewingReportResponse>(HttpMethod.PUT, '/pcast/reporting/viewing', requestViewingOptions);

    if (!response.viewingReport) {
      throw new Error('[Reporting] [requestViewingReport] Invalid response format - missing viewingReport data');
    }

    return response.viewingReport;
  }
}