/**
 * Required External Modules and Interfaces
 */
import express, {Request, Response} from 'express';
import * as QuestionsAdminService from './questions.admin.service.js';
import {sendServerError} from '../feedback.errors.js';

/**
 * Router Definition
 */
export const questionsAdminRouter = express.Router();

/**
 * @swagger
 * /feedback/admin/questions:
 *      get:
 *          summary: List the question library
 *          tags: [feedback-admin]
 *          parameters:
 *              - $ref: '#/components/parameters/SessionIdHeader'
 *              - $ref: '#/components/parameters/SessionKeyHeader'
 *              - in: query
 *                name: includeArchived
 *                schema:
 *                    type: boolean
 *          responses:
 *              200:
 *                  description: Success
 *                  content:
 *                      application/json:
 *                          schema:
 *                              type: array
 *                              items:
 *                                  $ref: '#/components/schemas/AdminQuestion'
 *              401:
 *                  description: Unauthorized
 *      post:
 *          summary: Create a question
 *          tags: [feedback-admin]
 *          parameters:
 *              - $ref: '#/components/parameters/SessionIdHeader'
 *              - $ref: '#/components/parameters/SessionKeyHeader'
 *          requestBody:
 *              required: true
 *              content:
 *                  application/json:
 *                      schema:
 *                          type: object
 *                          required: [label, questionType]
 *                          properties:
 *                              label:
 *                                  type: string
 *                              helpText:
 *                                  type: string
 *                              questionType:
 *                                  $ref: '#/components/schemas/QuestionType'
 *          responses:
 *              201:
 *                  description: Created
 *              400:
 *                  description: Missing or invalid fields
 *              401:
 *                  description: Unauthorized
 */
questionsAdminRouter.get('/', async (req: Request, res: Response) => {
	try {
		const includeArchived = req.query.includeArchived === 'true';
		res.status(200).send(await QuestionsAdminService.listQuestions(includeArchived));
	} catch (e: any) {
		sendServerError(res, e);
	}
});

const VALID_TYPES = ['SONG_PICK', 'SONG_RATING', 'FREE_TEXT'];

questionsAdminRouter.post('/', async (req: Request, res: Response) => {
	try {
		const {label, helpText, questionType} = req.body || {};
		if (!label || !VALID_TYPES.includes(questionType)) {
			res.status(400).send({status: 'BAD_REQUEST', message: 'label and a valid questionType are required'});
			return;
		}
		const questionId = await QuestionsAdminService.createQuestion(label, helpText || null, questionType);
		res.status(201).send({questionId});
	} catch (e: any) {
		sendServerError(res, e);
	}
});

/**
 * @swagger
 * /feedback/admin/questions/{questionId}:
 *      put:
 *          summary: Edit a question's label/help text
 *          description: question_type is immutable after creation - the admin UI offers "archive and create new" instead.
 *          tags: [feedback-admin]
 *          parameters:
 *              - $ref: '#/components/parameters/SessionIdHeader'
 *              - $ref: '#/components/parameters/SessionKeyHeader'
 *              - in: path
 *                name: questionId
 *                required: true
 *                schema:
 *                    type: integer
 *          requestBody:
 *              required: true
 *              content:
 *                  application/json:
 *                      schema:
 *                          type: object
 *                          required: [label]
 *                          properties:
 *                              label:
 *                                  type: string
 *                              helpText:
 *                                  type: string
 *          responses:
 *              200:
 *                  description: Updated
 *              400:
 *                  description: Missing label
 *              404:
 *                  description: Unknown question
 *              401:
 *                  description: Unauthorized
 *      delete:
 *          summary: Archive (or hard-delete) a question
 *          description: Archives the question if it has ever been used; hard-deletes it if it has never been assigned to any event.
 *          tags: [feedback-admin]
 *          parameters:
 *              - $ref: '#/components/parameters/SessionIdHeader'
 *              - $ref: '#/components/parameters/SessionKeyHeader'
 *              - in: path
 *                name: questionId
 *                required: true
 *                schema:
 *                    type: integer
 *          responses:
 *              200:
 *                  description: Archived or deleted
 *              404:
 *                  description: Unknown question
 *              401:
 *                  description: Unauthorized
 */
questionsAdminRouter.put('/:questionId', async (req: Request, res: Response) => {
	try {
		const {label, helpText} = req.body || {};
		if (!label) {
			res.status(400).send({status: 'BAD_REQUEST', message: 'label is required'});
			return;
		}
		const updated = await QuestionsAdminService.updateQuestion(Number(req.params.questionId), label, helpText || null);
		if (!updated) {
			res.status(404).send({status: 'NOT_FOUND'});
			return;
		}
		res.status(200).send({status: 'OK'});
	} catch (e: any) {
		sendServerError(res, e);
	}
});

questionsAdminRouter.delete('/:questionId', async (req: Request, res: Response) => {
	try {
		const result = await QuestionsAdminService.removeQuestion(Number(req.params.questionId));
		if (result === 'NOT_FOUND') {
			res.status(404).send({status: 'NOT_FOUND'});
			return;
		}
		res.status(200).send({status: result});
	} catch (e: any) {
		sendServerError(res, e);
	}
});