# All files / src/clients/ep votingClient.ts

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     /**
     * @fileoverview Voting sub-client for European Parliament API
     *
     * Handles voting records (roll-call votes) and plenary speeches.
     *
     * @module clients/ep/votingClient
     */

    import { auditLogger, toErrorMessage } from '../../utils/auditLogger.js';
    import type {
      VotingRecord,
      Speech,
      PaginatedResponse,
    } from '../../types/europeanParliament.js';
    import { toSafeString as _toSafeString } from './jsonLdHelpers.js';
    import {
      transformVoteResult as _transformVoteResult,
      transformSpeech as _transformSpeech,
    } from './transformers.js';
    import {
      BaseEPClient,
      APIError,
      type EPClientConfig,
      type EPSharedResources,
      type JSONLDResponse,
    } from './baseClient.js';

    /**
     * Sub-client for voting records and speeches EP API endpoints.
     *
     * @extends BaseEPClient
     * @public
     */
    export class VotingClient extends BaseEPClient {
      constructor(config: EPClientConfig = {}, shared?: EPSharedResources) {
        super(config, shared);
      }

      private transformVoteResult(
        apiData: Record<string, unknown>,
        sessionId: string
      ): VotingRecord {
        return _transformVoteResult(apiData, sessionId);
      }

      private transformSpeech(apiData: Record<string, unknown>): Speech {
        return _transformSpeech(apiData);
      }

      /**
       * Fetches vote results for a specific sitting/session.
       * @private
       */
      private async fetchVoteResultsForSession(
        sessionId: string,
        apiParams: Record<string, unknown>
      ): Promise<VotingRecord[]> {
        const response = await this.get<JSONLDResponse>(
          `meetings/${sessionId}/vote-results`,
          apiParams
        );
        return response.data.map((item) => this.transformVoteResult(item, sessionId));
      }

      /**
       * Fetches vote results from recent meetings when no sessionId is given.
       * @private
       */
      private async fetchVoteResultsFromRecentMeetings(params: {
        dateFrom?: string;
        limit?: number;
      }): Promise<VotingRecord[]> {
        const meetingsParams: Record<string, unknown> = { limit: 5 };
        if (params.dateFrom !== undefined && params.dateFrom !== '') {
          meetingsParams['year'] = params.dateFrom.substring(0, 4);
        }

        const meetingsResponse = await this.get<JSONLDResponse>('meetings', meetingsParams);
        const records: VotingRecord[] = [];
        const recordLimit = params.limit ?? 50;

        for (const meeting of meetingsResponse.data) {
          const meetingId =
            _toSafeString(meeting['activity_id']) ||
            _toSafeString(meeting['id']) ||
            '';
          Iif (meetingId === '') continue;

          try {
            const voteResponse = await this.get<JSONLDResponse>(
              `meetings/${meetingId}/vote-results`,
              { limit: recordLimit }
            );
            const transformed = voteResponse.data.map((item) =>
              this.transformVoteResult(item, meetingId)
            );
            records.push(...transformed);
          } catch (error: unknown) {
            auditLogger.logError('get_voting_records', { meetingId }, toErrorMessage(error));
          }

          Iif (records.length >= recordLimit) break;
        }

        return records;
      }

      /**
       * Applies client-side filters to voting records.
       * @private
       */
      private filterVotingRecords(
        records: VotingRecord[],
        params: { topic?: string; dateFrom?: string; dateTo?: string }
      ): VotingRecord[] {
        let filtered = records;
        if (params.topic !== undefined && params.topic !== '') {
          const topicLower = params.topic.toLowerCase();
          filtered = filtered.filter((r) =>
            r.topic.toLowerCase().includes(topicLower)
          );
        }
        if (params.dateFrom !== undefined && params.dateFrom !== '') {
          const fromDate = params.dateFrom;
          filtered = filtered.filter((r) => r.date >= fromDate);
        }
        if (params.dateTo !== undefined && params.dateTo !== '') {
          const toDate = params.dateTo;
          filtered = filtered.filter((r) => r.date <= toDate);
        }
        return filtered;
      }

      /**
       * Retrieves voting records with filtering by session, topic, and date.
       *
       * **EP API Endpoint:** `GET /meetings/{sitting-id}/vote-results`
       *
       * @param params - sessionId, topic, dateFrom, dateTo, limit, offset
       * @returns Paginated voting records list
       * @security Audit logged per GDPR Article 30
       */
      async getVotingRecords(params: {
        sessionId?: string;
        topic?: string;
        dateFrom?: string;
        dateTo?: string;
        limit?: number;
        offset?: number;
      }): Promise<PaginatedResponse<VotingRecord>> {
        const action = 'get_voting_records';

        try {
          const apiParams: Record<string, unknown> = {};
          if (params.limit !== undefined) apiParams['limit'] = params.limit;
          if (params.offset !== undefined) apiParams['offset'] = params.offset;

          const effectiveSessionId = params.sessionId ?? '';
          let records: VotingRecord[];

          if (effectiveSessionId !== '') {
            records = await this.fetchVoteResultsForSession(effectiveSessionId, apiParams);
          } else {
            records = await this.fetchVoteResultsFromRecentMeetings(params);
          }

          records = this.filterVotingRecords(records, params);

          const offset = params.offset ?? 0;
          const limit = params.limit ?? 50;
          const paginatedRecords = records.slice(offset, offset + limit);

          const result: PaginatedResponse<VotingRecord> = {
            data: paginatedRecords,
            total: records.length,
            limit,
            offset,
            hasMore: offset + paginatedRecords.length < records.length,
          };

          auditLogger.logDataAccess(action, params, result.data.length);
          return result;
        } catch (error: unknown) {
          auditLogger.logError(
            action,
            params,
            error instanceof Error ? error.message : 'Unknown error'
          );
          throw error;
        }
      }

      /**
       * Returns plenary speeches.
       * **EP API Endpoint:** `GET /speeches`
       *
       * **Note:** The EP API `/speeches` endpoint does **not** support a
       * `year` query parameter.  It supports `sitting-date` (range start)
       * and `sitting-date-end` (range end) for date filtering.
       *
       * Use `dateFrom` / `dateTo` (YYYY-MM-DD) for date-range queries —
       * these are mapped to `sitting-date` / `sitting-date-end`.
       */
      async getSpeeches(params: {
        dateFrom?: string;
        dateTo?: string;
        limit?: number;
        offset?: number;
      } = {}): Promise<PaginatedResponse<Speech>> {
        const limit = params.limit ?? 50;
        const offset = params.offset ?? 0;

        const apiParams: Record<string, unknown> = {
          format: 'application/ld+json',
          offset,
          limit,
        };
        if (params.dateFrom !== undefined) apiParams['sitting-date'] = params.dateFrom;
        if (params.dateTo !== undefined) apiParams['sitting-date-end'] = params.dateTo;

        const response = await this.get<JSONLDResponse>('speeches', apiParams);
        const items = Array.isArray(response.data) ? response.data : [];
        const speeches = items.map((item) => this.transformSpeech(item));
        const hasMore = speeches.length === limit;
        return { data: speeches, total: speeches.length + offset + (hasMore ? 1 : 0), limit, offset, hasMore };
      }

      /**
       * Returns a single speech by ID.
       * **EP API Endpoint:** `GET /speeches/{speech-id}`
       */
      async getSpeechById(speechId: string): Promise<Speech> {
        if (speechId.trim() === '') {
          throw new APIError('Speech ID is required', 400);
        }
        const response = await this.get<Record<string, unknown>>(
          `speeches/${speechId}`,
          { format: 'application/ld+json' }
        );
        return this.transformSpeech(response);
      }
    }