/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
import { Request, Response } from 'express';
import Controller from '../controller';
import { extractUsername } from '../../util/extract-user';
import { NONE, UPDATE_FEATURE } from '../../types/permissions';
import { IUnleashConfig } from '../../types/option';
import { IUnleashServices } from '../../types';
import FeatureToggleService from '../../services/feature-toggle-service';
import { featureSchema, querySchema } from '../../schema/feature-schema';
import { IFeatureToggleQuery } from '../../types/model';
import FeatureTagService from '../../services/feature-tag-service';
import { IAuthRequest } from '../unleash-types';
import { DEFAULT_ENV } from '../../util/constants';
import {
    featuresSchema,
    FeaturesSchema,
} from '../../openapi/spec/features-schema';
import { TagSchema } from '../../openapi/spec/tag-schema';
import { TagsSchema } from '../../openapi/spec/tags-schema';
import { serializeDates } from '../../types/serialize-dates';
import { OpenApiService } from '../../services/openapi-service';
import { createRequestSchema } from '../../openapi/util/create-request-schema';
import {
    createResponseSchema,
    resourceCreatedResponseSchema,
} from '../../openapi/util/create-response-schema';
import {
    emptyResponse,
    getStandardResponses,
} from '../../openapi/util/standard-responses';
import { UpdateTagsSchema } from '../../openapi/spec/update-tags-schema';

const version = 1;

class FeatureController extends Controller {
    private tagService: FeatureTagService;

    private openApiService: OpenApiService;

    private service: FeatureToggleService;

    constructor(
        config: IUnleashConfig,
        {
            featureTagService,
            featureToggleServiceV2,
            openApiService,
        }: Pick<
            IUnleashServices,
            'featureTagService' | 'featureToggleServiceV2' | 'openApiService'
        >,
    ) {
        super(config);
        this.tagService = featureTagService;
        this.openApiService = openApiService;
        this.service = featureToggleServiceV2;

        this.route({
            method: 'get',
            path: '',
            handler: this.getAllToggles,
            permission: NONE,
            middleware: [
                openApiService.validPath({
                    tags: ['Features'],
                    operationId: 'getAllToggles',
                    responses: { 200: createResponseSchema('featuresSchema') },
                    deprecated: true,
                }),
            ],
        });

        this.route({
            method: 'post',
            path: '/validate',
            handler: this.validate,
            permission: NONE,
            middleware: [
                openApiService.validPath({
                    tags: ['Features'],
                    operationId: 'validateFeature',
                    responses: { 200: emptyResponse },
                }),
            ],
        });

        this.route({
            method: 'get',
            path: '/:featureName/tags',
            handler: this.listTags,
            permission: NONE,
            middleware: [
                openApiService.validPath({
                    summary: 'Get all tags for a feature.',
                    description:
                        'Retrieves all the tags for a feature name. If the feature does not exist it returns an empty list.',
                    tags: ['Features'],
                    operationId: 'listTags',
                    responses: {
                        200: createResponseSchema('tagsSchema'),
                        ...getStandardResponses(401, 403, 404),
                    },
                }),
            ],
        });

        this.route({
            method: 'post',
            path: '/:featureName/tags',
            permission: UPDATE_FEATURE,
            handler: this.addTag,
            middleware: [
                openApiService.validPath({
                    summary: 'Adds a tag to a feature.',
                    description:
                        'Adds a tag to a feature if the feature and tag type exist in the system. The operation is idempotent, so adding an existing tag will result in a successful response.',
                    tags: ['Features'],
                    operationId: 'addTag',
                    requestBody: createRequestSchema('tagSchema'),
                    responses: {
                        201: resourceCreatedResponseSchema('tagSchema'),
                        ...getStandardResponses(400, 401, 403, 404),
                    },
                }),
            ],
        });

        this.route({
            method: 'put',
            path: '/:featureName/tags',
            permission: UPDATE_FEATURE,
            handler: this.updateTags,
            middleware: [
                openApiService.validPath({
                    summary: 'Updates multiple tags for a feature.',
                    description:
                        'Receives a list of tags to add and a list of tags to remove that are mandatory but can be empty. All tags under addedTags are first added to the feature and then all tags under removedTags are removed from the feature.',
                    tags: ['Features'],
                    operationId: 'updateTags',
                    requestBody: createRequestSchema('updateTagsSchema'),
                    responses: {
                        200: resourceCreatedResponseSchema('tagsSchema'),
                        ...getStandardResponses(400, 401, 403, 404),
                    },
                }),
            ],
        });

        this.route({
            method: 'delete',
            path: '/:featureName/tags/:type/:value',
            permission: UPDATE_FEATURE,
            acceptAnyContentType: true,
            handler: this.removeTag,
            middleware: [
                openApiService.validPath({
                    summary: 'Removes a tag from a feature.',
                    description:
                        'Removes a tag from a feature. If the feature exists but the tag does not, it returns a successful response.',
                    tags: ['Features'],
                    operationId: 'removeTag',
                    responses: {
                        200: emptyResponse,
                        ...getStandardResponses(404),
                    },
                }),
            ],
        });
    }

    // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
    paramToArray(param: any) {
        if (!param) {
            return param;
        }
        return Array.isArray(param) ? param : [param];
    }

    async prepQuery({
        tag,
        project,
        namePrefix,
    }: any): Promise<IFeatureToggleQuery> {
        if (!tag && !project && !namePrefix) {
            return null;
        }
        const tagQuery = this.paramToArray(tag);
        const projectQuery = this.paramToArray(project);
        const query = await querySchema.validateAsync({
            tag: tagQuery,
            project: projectQuery,
            namePrefix,
        });
        if (query.tag) {
            query.tag = query.tag.map((q) => q.split(':'));
        }
        return query;
    }

    async getAllToggles(
        req: IAuthRequest,
        res: Response<FeaturesSchema>,
    ): Promise<void> {
        const query = await this.prepQuery(req.query);
        const { user } = req;
        const features = await this.service.getFeatureToggles(query, user.id);

        this.openApiService.respondWithValidation(
            200,
            res,
            featuresSchema.$id,
            { version, features: serializeDates(features) },
        );
    }

    async getToggle(
        req: Request<{ featureName: string }, any, any, any>,
        res: Response,
    ): Promise<void> {
        const name = req.params.featureName;
        const feature = await this.service.getFeatureToggleLegacy(name);
        res.json(feature).end();
    }

    async listTags(
        req: Request<{ featureName: string }, any, any, any>,
        res: Response<TagsSchema>,
    ): Promise<void> {
        const tags = await this.tagService.listTags(req.params.featureName);
        res.json({ version, tags });
    }

    async addTag(
        req: IAuthRequest<
            { featureName: string },
            Response<TagSchema>,
            TagSchema,
            any
        >,
        res: Response<TagSchema>,
    ): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);
        const tag = await this.tagService.addTag(
            featureName,
            req.body,
            userName,
        );
        res.status(201).header('location', `${featureName}/tags`).json(tag);
    }

    async updateTags(
        req: IAuthRequest<
            { featureName: string },
            Response<TagsSchema>,
            UpdateTagsSchema,
            any
        >,
        res: Response<TagsSchema>,
    ): Promise<void> {
        const { featureName } = req.params;
        const { addedTags, removedTags } = req.body;
        const userName = extractUsername(req);

        await Promise.all(
            addedTags.map((addedTag) =>
                this.tagService.addTag(featureName, addedTag, userName),
            ),
        );

        await Promise.all(
            removedTags.map((removedTag) =>
                this.tagService.removeTag(featureName, removedTag, userName),
            ),
        );

        const tags = await this.tagService.listTags(featureName);
        res.json({ version, tags });
    }

    // TODO
    async removeTag(
        req: IAuthRequest<{ featureName: string; type: string; value: string }>,
        res: Response<void>,
    ): Promise<void> {
        const { featureName, type, value } = req.params;
        const userName = extractUsername(req);
        await this.tagService.removeTag(featureName, { type, value }, userName);
        res.status(200).end();
    }

    async validate(
        req: Request<any, any, { name: string }, any>,
        res: Response<void>,
    ): Promise<void> {
        const { name } = req.body;

        await this.service.validateName(name);
        res.status(200).end();
    }

    async createToggle(req: IAuthRequest, res: Response): Promise<void> {
        const userName = extractUsername(req);
        const toggle = req.body;

        const validatedToggle = await featureSchema.validateAsync(toggle);
        const { enabled, project, name, variants = [] } = validatedToggle;
        const createdFeature = await this.service.createFeatureToggle(
            project,
            validatedToggle,
            userName,
            true,
        );
        const strategies = await Promise.all(
            (toggle.strategies ?? []).map(async (s) =>
                this.service.createStrategy(
                    s,
                    {
                        projectId: project,
                        featureName: name,
                        environment: DEFAULT_ENV,
                    },
                    userName,
                    req.user,
                ),
            ),
        );
        await this.service.updateEnabled(
            project,
            name,
            DEFAULT_ENV,
            enabled,
            userName,
        );
        await this.service.saveVariants(name, project, variants, userName);

        res.status(201).json({
            ...createdFeature,
            variants,
            enabled,
            strategies,
        });
    }

    async updateToggle(req: IAuthRequest, res: Response): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);
        const updatedFeature = req.body;

        updatedFeature.name = featureName;

        const projectId = await this.service.getProjectId(featureName);
        const value = await featureSchema.validateAsync(updatedFeature);

        await this.service.updateFeatureToggle(
            projectId,
            value,
            userName,
            featureName,
        );

        await this.service.removeAllStrategiesForEnv(featureName);

        if (updatedFeature.strategies) {
            await Promise.all(
                updatedFeature.strategies.map(async (s) =>
                    this.service.createStrategy(
                        s,
                        { projectId, featureName, environment: DEFAULT_ENV },
                        userName,
                        req.user,
                    ),
                ),
            );
        }
        await this.service.updateEnabled(
            projectId,
            featureName,
            DEFAULT_ENV,
            updatedFeature.enabled,
            userName,
        );
        await this.service.saveVariants(
            featureName,
            projectId,
            value.variants || [],
            userName,
        );

        const feature = await this.service.storeFeatureUpdatedEventLegacy(
            featureName,
            userName,
        );

        res.status(200).json(feature);
    }

    /**
     * @deprecated TODO: remove?
     *
     * Kept to keep backward compatibility
     */
    async toggle(req: IAuthRequest, res: Response): Promise<void> {
        const userName = extractUsername(req);
        const { featureName } = req.params;
        const projectId = await this.service.getProjectId(featureName);
        const feature = await this.service.toggle(
            projectId,
            featureName,
            DEFAULT_ENV,
            userName,
        );
        await this.service.storeFeatureUpdatedEventLegacy(
            featureName,
            userName,
        );
        res.status(200).json(feature);
    }

    async toggleOn(req: IAuthRequest, res: Response): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);
        const projectId = await this.service.getProjectId(featureName);
        const feature = await this.service.updateEnabled(
            projectId,
            featureName,
            DEFAULT_ENV,
            true,
            userName,
        );
        await this.service.storeFeatureUpdatedEventLegacy(
            featureName,
            userName,
        );
        res.json(feature);
    }

    async toggleOff(req: IAuthRequest, res: Response): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);
        const projectId = await this.service.getProjectId(featureName);
        const feature = await this.service.updateEnabled(
            projectId,
            featureName,
            DEFAULT_ENV,
            false,
            userName,
        );
        await this.service.storeFeatureUpdatedEventLegacy(
            featureName,
            userName,
        );
        res.json(feature);
    }

    async staleOn(req: IAuthRequest, res: Response): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);
        await this.service.updateStale(featureName, true, userName);
        const feature = await this.service.getFeatureToggleLegacy(featureName);
        res.json(feature);
    }

    async staleOff(req: IAuthRequest, res: Response): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);
        await this.service.updateStale(featureName, false, userName);
        const feature = await this.service.getFeatureToggleLegacy(featureName);
        res.json(feature);
    }

    async archiveToggle(req: IAuthRequest, res: Response): Promise<void> {
        const { featureName } = req.params;
        const userName = extractUsername(req);

        await this.service.archiveToggle(featureName, userName);
        res.status(200).end();
    }
}
export default FeatureController;