# All files / src/tools getParliamentaryQuestions.ts

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     /**
     * MCP Tool: get_parliamentary_questions
     *
     * Retrieve European Parliament questions and answers
     *
     * **Intelligence Perspective:** Reveals MEP policy priorities, Commission/Council scrutiny
     * patterns, and emerging political concerns through question topic analysis and frequency.
     *
     * **Business Perspective:** Enables regulatory early-warning products—questions often signal
     * upcoming policy initiatives, making this valuable for compliance and government affairs.
     *
     * **Marketing Perspective:** Unique dataset showcasing democratic accountability—ideal
     * for transparency advocates, investigative journalists, and academic researchers.
     *
     * ISMS Policy: SC-002 (Input Validation), AC-003 (Least Privilege)
     */

    import { GetParliamentaryQuestionsSchema, ParliamentaryQuestionSchema, PaginatedResponseSchema } from '../schemas/europeanParliament.js';
    import { epClient } from '../clients/europeanParliamentClient.js';
    import { buildToolResponse } from './shared/responseBuilder.js';
    import { buildApiParams } from './shared/paramBuilder.js';
    import { ToolError } from './shared/errors.js';
    import { z } from 'zod';
    import type { ToolResult } from './shared/types.js';

    /**
     * Handles the get_parliamentary_questions MCP tool request.
     *
     * Retrieves European Parliament questions (written and oral) submitted by MEPs,
     * with optional single-question lookup by docId or list filtering by type, author,
     * topic, status, and date range.
     *
     * @param args - Raw tool arguments, validated against {@link GetParliamentaryQuestionsSchema}
     * @returns MCP tool result containing either a single question record or a paginated list of parliamentary questions
     * @throws - If `args` fails schema validation (e.g., missing required fields or invalid format)
     * - If the European Parliament API is unreachable or returns an error response
     *
     * @example
     * ```typescript
     * // List answered written questions on climate policy
     * const result = await handleGetParliamentaryQuestions({
     *   type: 'WRITTEN',
     *   status: 'ANSWERED',
     *   topic: 'climate policy',
     *   limit: 20
     * });
     * // Returns up to 20 answered written questions matching the topic
     *
     * // Single question lookup
     * const single = await handleGetParliamentaryQuestions({ docId: 'E-000001/2024' });
     * // Returns the full record for the specified question
     * ```
     *
     * @security - Input is validated with Zod before any API call.
     * - Personal data in responses is minimised per GDPR Article 5(1)(c).
     * - All requests are rate-limited and audit-logged per ISMS Policy AU-002.
     * @since 0.8.0
     * @see {@link getParliamentaryQuestionsToolMetadata} for MCP schema registration
     * @see {@link handleGetVotingRecords} for retrieving plenary voting data
     */
    export async function handleGetParliamentaryQuestions(
      args: unknown
    ): Promise<ToolResult> {
      let params: ReturnType<typeof GetParliamentaryQuestionsSchema.parse>;
      try {
        params = GetParliamentaryQuestionsSchema.parse(args);
      } catch (error: unknown) {
        Eif (error instanceof z.ZodError) {
          const fieldErrors = error.issues.map(e => `${e.path.join('.')}: ${e.message}`).join('; ');
          throw new ToolError({
            toolName: 'get_parliamentary_questions',
            operation: 'validateInput',
            message: `Invalid parameters: ${fieldErrors}`,
            isRetryable: false,
            cause: error,
          });
        }
        throw error;
      }

      try {
        if (params.docId !== undefined) {
          const result = await epClient.getParliamentaryQuestionById(params.docId);
          const validated = ParliamentaryQuestionSchema.parse(result);
          return buildToolResponse(validated);
        }

        const apiParams = {
          limit: params.limit,
          offset: params.offset,
          ...buildApiParams(params, [
            { from: 'type', to: 'type' },
            { from: 'author', to: 'author' },
            { from: 'topic', to: 'topic' },
            { from: 'status', to: 'status' },
            { from: 'dateFrom', to: 'dateFrom' },
            { from: 'dateTo', to: 'dateTo' },
          ]),
        };

        const result = await epClient.getParliamentaryQuestions(apiParams);

        const outputSchema = PaginatedResponseSchema(ParliamentaryQuestionSchema);
        const validated = outputSchema.parse(result);

        return buildToolResponse(validated);
      } catch (error: unknown) {
        Iif (error instanceof z.ZodError) {
          const fieldErrors = error.issues.map(e => `${e.path.join('.')}: ${e.message}`).join('; ');
          throw new ToolError({
            toolName: 'get_parliamentary_questions',
            operation: 'validateOutput',
            message: `Unexpected EP API response format: ${fieldErrors}`,
            isRetryable: false,
            cause: error,
          });
        }
        throw new ToolError({
          toolName: 'get_parliamentary_questions',
          operation: 'fetchData',
          message: 'Failed to retrieve parliamentary questions',
          isRetryable: true,
          cause: error,
        });
      }
    }

    /**
     * Tool metadata for MCP registration
     */
    export const getParliamentaryQuestionsToolMetadata = {
      name: 'get_parliamentary_questions',
      description: 'Retrieve European Parliament questions (written and oral) submitted by MEPs, or a single question by docId. Filter by question type, author, topic, status (pending/answered), and date range. Returns question text, answers if available, and metadata.',
      inputSchema: {
        type: 'object' as const,
        properties: {
          docId: {
            type: 'string',
            description: 'Document ID for single question lookup'
          },
          type: {
            type: 'string',
            description: 'Question type',
            enum: ['WRITTEN', 'ORAL']
          },
          author: {
            type: 'string',
            description: 'MEP identifier or name of question author',
            minLength: 1,
            maxLength: 100
          },
          topic: {
            type: 'string',
            description: 'Question topic or keyword to search',
            minLength: 1,
            maxLength: 200
          },
          status: {
            type: 'string',
            description: 'Question status',
            enum: ['PENDING', 'ANSWERED']
          },
          dateFrom: {
            type: 'string',
            description: 'Start date filter (YYYY-MM-DD format)',
            pattern: '^\\d{4}-\\d{2}-\\d{2}$'
          },
          dateTo: {
            type: 'string',
            description: 'End date filter (YYYY-MM-DD format)',
            pattern: '^\\d{4}-\\d{2}-\\d{2}$'
          },
          limit: {
            type: 'number',
            description: 'Maximum number of results to return (1-100)',
            minimum: 1,
            maximum: 100,
            default: 50
          },
          offset: {
            type: 'number',
            description: 'Pagination offset',
            minimum: 0,
            default: 0
          }
        }
      }
    };