import {beforeAll, describe, expect, it} from "vitest";
import {setupTestApp} from "../../setup-tests";
import {LearningObject} from "../../../src/entities/content/learning-object.entity";
import {LearningPath} from "../../../src/entities/content/learning-path.entity";
import {getLearningObjectRepository, getLearningPathRepository} from "../../../src/data/repositories";
import learningObjectExample from "../../test-assets/learning-objects/pn-werkingnotebooks/pn-werkingnotebooks-example";
import learningPathExample from "../../test-assets/learning-paths/pn-werking-example";
import {Language} from "../../../src/entities/content/language";
import learningPathService from "../../../src/services/learning-paths/learning-path-service";

async function initExampleData(): Promise<{ learningObject: LearningObject, learningPath: LearningPath }> {
    const learningObjectRepo = getLearningObjectRepository();
    const learningPathRepo = getLearningPathRepository();
    const learningObject = learningObjectExample.createLearningObject();
    const learningPath = learningPathExample.createLearningPath();
    await learningObjectRepo.save(learningObject);
    await learningPathRepo.save(learningPath);
    return { learningObject, learningPath };
}

const TEST_DWENGO_LEARNING_PATH_HRUID = "pn_werking";
const TEST_DWENGO_LEARNING_PATH_TITLE = "Werken met notebooks";
const TEST_DWENGO_EXCLUSIVE_LEARNING_PATH_SEARCH_QUERY = "Microscopie";
const TEST_SEARCH_QUERY_EXPECTING_NO_MATCHES = "su$m8f9usf89ud<p9<U8SDP8UP9";

describe("LearningPathService", () => {
    let example: { learningObject: LearningObject, learningPath: LearningPath };
    beforeAll(async () => {
        await setupTestApp();
        example = await initExampleData();
    });
    describe("fetchLearningPaths", () => {
        it("should return learning paths both from the database and from the Dwengo API", async () => {
            const result = await learningPathService.fetchLearningPaths(
                [example.learningPath.hruid, TEST_DWENGO_LEARNING_PATH_HRUID],
                example.learningPath.language,
                "the source"
            );
            expect(result.success).toBeTruthy();
            expect(result.data?.filter(it => it.hruid == TEST_DWENGO_LEARNING_PATH_HRUID).length).not.toBe(0);
            expect(result.data?.filter(it => it.hruid == example.learningPath.hruid).length).not.toBe(0);
            expect(result.data?.filter(it => it.hruid == TEST_DWENGO_LEARNING_PATH_HRUID)[0].title)
                .toEqual(TEST_DWENGO_LEARNING_PATH_TITLE);
            expect(result.data?.filter(it => it.hruid == example.learningPath.hruid)[0].title)
                .toEqual(example.learningPath.title);
        });
        it("should include both the learning objects from the Dwengo API and learning objects from the database in its response", async () => {
            const result = await learningPathService.fetchLearningPaths(
                [example.learningPath.hruid],
                example.learningPath.language,
                "the source"
            );
            expect(result.success).toBeTruthy();
            expect(result.data?.length).toBe(1);

            // Should include all the nodes, even those pointing to foreign learning objects.
            expect(
                [...result.data![0].nodes.map(it => it.learningobject_hruid)].sort()
            ).toEqual(
                example.learningPath.nodes.map(it => it.learningObjectHruid).sort()
            );
        });
    });
    describe("searchLearningPath", () => {
        it("should include both the learning paths from the Dwengo API and those from the database in its response", async () => {
            // This matches the learning object in the database, but definitely also some learning objects in the Dwengo API.
            const result = await learningPathService.searchLearningPaths(
                example.learningPath.title.substring(2, 3),
                example.learningPath.language
            );

            // Should find the one from the database
            expect(
                result.filter(it =>
                    it.hruid === example.learningPath.hruid && it.title === example.learningPath.title
                ).length
            ).toBe(1);

            // But should not only find that one.
            expect(result.length).not.toBeLessThan(2);
        });
        it("should still return results from the Dwengo API even though there are no matches in the database", async () => {
            const result = await learningPathService.searchLearningPaths(
                TEST_DWENGO_EXCLUSIVE_LEARNING_PATH_SEARCH_QUERY,
                Language.Dutch
            );

            // Should find something...
            expect(result.length).not.toBe(0);

            // But not the example learning path.
            expect(
                result.filter(it =>
                    it.hruid === example.learningPath.hruid && it.title === example.learningPath.title
                ).length
            ).toBe(0);
        });
        it("should return an empty list if neither the Dwengo API nor the database contains matches", async () => {
            const result = await learningPathService.searchLearningPaths(
                TEST_SEARCH_QUERY_EXPECTING_NO_MATCHES,
                Language.Dutch
            );
            expect(result.length).toBe(0);
        });
    });
});