import { v4 as uuidv4 } from 'uuid';
import dbInit, {
    type ITestDb,
} from '../../../test/e2e/helpers/database-init.js';
import {
    type IUnleashTest,
    setupAppWithCustomConfig,
} from '../../../test/e2e/helpers/test-helper.js';
import getLogger from '../../../test/fixtures/no-logger.js';
import type { CreateDependentFeatureSchema } from '../../openapi/index.js';
import {
    FEATURE_DEPENDENCIES_REMOVED,
    FEATURE_DEPENDENCY_ADDED,
    FEATURE_DEPENDENCY_REMOVED,
} from '../../events/index.js';
import { DEFAULT_ENV } from '../../util/index.js';
import type { IEventStore } from '../../server-impl.js';

let app: IUnleashTest;
let db: ITestDb;
let eventStore: IEventStore;

beforeAll(async () => {
    db = await dbInit('dependent_features', getLogger);
    app = await setupAppWithCustomConfig(
        db.stores,
        {
            experimental: {
                flags: {
                    strictSchemaValidation: true,
                    enableLegacyVariants: true,
                },
            },
        },
        db.rawDatabase,
    );
    eventStore = db.stores.eventStore;
});

const createProject = async (name: string) => {
    await db.stores.projectStore.create({
        name: name,
        description: '',
        id: name,
        mode: 'open' as const,
    });
};

const getRecordedEventTypesForDependencies = async () =>
    (await eventStore.getEvents())
        .map((event) => event.type)
        .filter((type) => type.includes('depend'));

afterAll(async () => {
    await app.destroy();
    await db.destroy();
});

beforeEach(async () => {
    await db.stores.dependentFeaturesStore.deleteAll();
    await db.stores.featureToggleStore.deleteAll();
    await db.stores.featureEnvironmentStore.deleteAll();
    await db.stores.eventStore.deleteAll();
});

const addFeatureDependency = async (
    childFeature: string,
    payload: CreateDependentFeatureSchema,
    expectedCode = 200,
) => {
    return app.request
        .post(
            `/api/admin/projects/default/features/${childFeature}/dependencies`,
        )
        .send(payload)
        .expect(expectedCode);
};

const deleteFeatureDependency = async (
    childFeature: string,
    parentFeature: string,
    expectedCode = 200,
) => {
    return app.request
        .delete(
            `/api/admin/projects/default/features/${childFeature}/dependencies/${parentFeature}`,
        )
        .expect(expectedCode);
};

const deleteFeatureDependencies = async (
    childFeature: string,
    expectedCode = 200,
) => {
    return app.request
        .delete(
            `/api/admin/projects/default/features/${childFeature}/dependencies`,
        )
        .expect(expectedCode);
};

const getPossibleParentFeatures = async (
    childFeature: string,
    expectedCode = 200,
) => {
    return app.request
        .get(`/api/admin/projects/default/features/${childFeature}/parents`)
        .expect(expectedCode);
};

const getPossibleParentVariants = async (
    parentFeature: string,
    expectedCode = 200,
) => {
    return app.request
        .get(
            `/api/admin/projects/default/features/${parentFeature}/parent-variants`,
        )
        .expect(expectedCode);
};

const addStrategyVariants = async (parent: string, variants: string[]) => {
    await app.addStrategyToFeatureEnv(
        {
            name: 'flexibleRollout',
            constraints: [],
            parameters: { rollout: '100', stickiness: 'default' },
            variants: variants.map((name) => ({
                name,
                weight: 1000,
                weightType: 'variable',
                stickiness: 'default',
            })),
        },
        DEFAULT_ENV,
        parent,
    );
};

const addFeatureEnvironmentVariant = async (
    parent: string,
    variant: string,
) => {
    await app.request
        .patch(
            `/api/admin/projects/default/features/${parent}/environments/${DEFAULT_ENV}/variants`,
        )
        .set('Content-Type', 'application/json')
        .send([
            {
                op: 'add',
                path: '/0',
                value: {
                    name: variant,
                    weightType: 'variable',
                    weight: 1000,
                    overrides: [],
                    stickiness: 'default',
                },
            },
        ])
        .expect(200);
};

const checkDependenciesExist = async (expectedCode = 200) => {
    return app.request
        .get(`/api/admin/projects/default/dependencies`)
        .expect(expectedCode);
};

test('should add and delete feature dependencies', async () => {
    const parent = uuidv4();
    const child = uuidv4();
    const child2 = uuidv4();
    await app.createFeature(parent);
    await app.createFeature(child);
    await app.createFeature(child2);

    const { body: options } = await getPossibleParentFeatures(child);
    expect(options).toMatchObject([parent, child2].sort());

    // save explicit enabled and variants
    await addFeatureDependency(child, {
        feature: parent,
        enabled: false,
    });
    // overwrite with implicit enabled: true and variants
    await addFeatureDependency(child, {
        feature: parent,
        variants: ['variantB'],
    });

    await addFeatureDependency(child2, {
        feature: parent,
        enabled: false,
    });

    await deleteFeatureDependency(child, parent); // single
    await deleteFeatureDependencies(child2); // all

    const eventTypes = await getRecordedEventTypesForDependencies();
    expect(eventTypes).toStrictEqual([
        FEATURE_DEPENDENCIES_REMOVED,
        FEATURE_DEPENDENCY_REMOVED,
        FEATURE_DEPENDENCY_ADDED,
        FEATURE_DEPENDENCY_ADDED,
        FEATURE_DEPENDENCY_ADDED,
    ]);
});

test('should sort potential parent features alphabetically', async () => {
    const parent1 = `a${uuidv4()}`;
    const parent2 = `c${uuidv4()}`;
    const parent3 = `b${uuidv4()}`;
    const child = uuidv4();
    await app.createFeature(parent1);
    await app.createFeature(parent2);
    await app.createFeature(parent3);
    await app.createFeature(child);

    const { body: options } = await getPossibleParentFeatures(child);
    expect(options).toStrictEqual([parent1, parent3, parent2]);
});

test('should sort potential parent variants', async () => {
    const parent = uuidv4();
    await app.createFeature(parent);
    await addFeatureEnvironmentVariant(parent, 'e');
    await addStrategyVariants(parent, ['c', 'a', 'd']);
    await addStrategyVariants(parent, ['b', 'd']);

    const { body: variants } = await getPossibleParentVariants(parent);

    expect(variants).toStrictEqual(['a', 'b', 'c', 'd', 'e']);
});

test('should not allow to add grandparent', async () => {
    const grandparent = uuidv4();
    const parent = uuidv4();
    const child = uuidv4();
    await app.createFeature(grandparent);
    await app.createFeature(parent);
    await app.createFeature(child);

    await addFeatureDependency(child, {
        feature: parent,
    });
    await addFeatureDependency(
        parent,
        {
            feature: grandparent,
        },
        403,
    );
});

test('should not allow to add grandchild', async () => {
    const grandparent = uuidv4();
    const parent = uuidv4();
    const child = uuidv4();
    await app.createFeature(grandparent);
    await app.createFeature(parent);
    await app.createFeature(child);

    await addFeatureDependency(parent, {
        feature: grandparent,
    });

    await addFeatureDependency(
        child,
        {
            feature: parent,
        },
        403,
    );
});

test('should not allow to add non-existent parent dependency', async () => {
    const parent = uuidv4();
    const child = uuidv4();
    await app.createFeature(child);

    await addFeatureDependency(
        child,
        {
            feature: parent,
        },
        403,
    );
});

test('should not allow to add archived parent dependency', async () => {
    const parent = uuidv4();
    const child = uuidv4();
    await app.createFeature(child);
    await app.createFeature(parent);
    await app.archiveFeature(parent);

    await addFeatureDependency(
        child,
        {
            feature: parent,
        },
        403,
    );
});

test('should check if any dependencies exist', async () => {
    const parent = uuidv4();
    const child = uuidv4();
    await app.createFeature(child);
    await app.createFeature(parent);

    const { body: dependenciesExistBefore } = await checkDependenciesExist();
    expect(dependenciesExistBefore).toBe(false);

    await addFeatureDependency(child, {
        feature: parent,
    });

    const { body: dependenciesExistAfter } = await checkDependenciesExist();
    expect(dependenciesExistAfter).toBe(true);
});

test('should not allow to add dependency to self', async () => {
    const parent = uuidv4();
    await app.createFeature(parent);

    await addFeatureDependency(
        parent,
        {
            feature: parent,
        },
        403,
    );
});

test('should not allow to add dependency to feature from another project', async () => {
    const child = uuidv4();
    const parent = uuidv4();
    await app.createFeature(parent);
    await createProject('another-project');
    await app.createFeature(child, 'another-project');

    await addFeatureDependency(
        child,
        {
            feature: parent,
        },
        403,
    );
});
test('should create feature-dependency-removed when archiving and has dependency', async () => {
    const child = uuidv4();
    const parent = uuidv4();
    await app.createFeature(parent);
    await app.createFeature(child);

    await addFeatureDependency(child, {
        feature: parent,
    });
    await app.archiveFeature(child);
    const events = await eventStore.getEvents();
    expect(events).toEqual(
        expect.arrayContaining([
            expect.objectContaining({ type: 'feature-dependencies-removed' }),
        ]),
    );
});

test('should not create feature-dependency-removed when archiving and no dependency', async () => {
    const child = uuidv4();
    const parent = uuidv4();
    await app.createFeature(parent);
    await app.createFeature(child);

    await app.archiveFeature(child);
    const events = await eventStore.getEvents();
    expect(events).not.toEqual(
        expect.arrayContaining([
            expect.objectContaining({ type: 'feature-dependencies-removed' }),
        ]),
    );
});