2025SELab2-project-Dwengo/backend/src/services/learningPaths.ts

import { fetchWithLogging } from '../util/apiHelper.js';
import { DWENGO_API_BASE } from '../config.js';
import {
    LearningPath,
    LearningPathResponse,
} from '../interfaces/learningPath.js';
import { getLogger, Logger } from '../logging/initalize.js';

const logger: Logger = getLogger();

export async function fetchLearningPaths(
    hruids: string[],
    language: string,
    source: string
): Promise<LearningPathResponse> {
    if (hruids.length === 0) {
        return {
            success: false,
            source,
            data: null,
            message: `No HRUIDs provided for ${source}.`,
        };
    }

    const apiUrl = `${DWENGO_API_BASE}/learningPath/getPathsFromIdList`;
    const params = { pathIdList: JSON.stringify({ hruids }), language };

    const learningPaths = await fetchWithLogging<LearningPath[]>(
        apiUrl,
        `Learning paths for ${source}`,
        params
    );

    if (!learningPaths || learningPaths.length === 0) {
        logger.warn(`⚠️ WARNING: No learning paths found for ${source}.`);
        return {
            success: false,
            source,
            data: [],
            message: `No learning paths found for ${source}.`,
        };
    }

    return {
        success: true,
        source,
        data: learningPaths,
    };
}

export async function searchLearningPaths(
    query: string,
    language: string
): Promise<LearningPath[]> {
    const apiUrl = `${DWENGO_API_BASE}/learningPath/search`;
    const params = { all: query, language };

    const searchResults = await fetchWithLogging<LearningPath[]>(
        apiUrl,
        `Search learning paths with query "${query}"`,
        params
    );
    return searchResults ?? [];
}