import CaptchaService from "../services/captcha.js";
import jwt from 'jsonwebtoken';
import config from '../config.js';

class CaptchaController {
    async submit(req, res) {
        const { image, solution } = req.body;
        if (!image) return res.status(400).send({ "message": "You must send image blob" });

        if (!solution || solution.length != config.captcha_length) return res.status(400).send({ "message": "You must send a valid solution" });
        for (let i = 0; i < solution.length; i++) {
            let char = solution[i];
            if (!char.match(config.alphabet)) {
                console.log("Illegal symbol: " + char);
                return res.status(400).send({ "message": `Illegal symbol ${char} at position ${i + 1}` });
            }
        }
        try {
            await CaptchaService.new(image, solution, jwt.decode(req.token).id);
        } catch (e) {
            console.log(`Error upon submitting: ${e}`);
            return res.status(500).send({ "message": "Unknown server error. Please, contact the developer." });
        }
        return res.status(200).send({ "message": "Success" });
    }

    async get(req, res) {
        try {
            const { id } = req.params;
            const captcha = await CaptchaService.get(id);
            if (captcha == undefined) return res.status(404).send({ "message": "no such captcha found" });
            return res.status(200).send({ "message": "success", "captcha": captcha })
        } catch (e) {
            console.log(`Error upon requesting one captcha: ${e}`)
            if (e.code == 'ENOENT') return res.status(404).send({ "message": "The ID exists in the DB but I can't find an actual image. Please, contact the developer." })
            return res.status(500).send({ "message": "Unknown server error. Please, contact the developer." })
        }
    }

    async get_all(req, res) {
        try {
            return res.status(200).send({ "message": "success", "captchas": await CaptchaService.get_all() });
        } catch (e) {
            console.log(`Error upon requesting all captchas: ${e}`)
            return res.status(500).send({ "message": "Unknown server error. Please, contact the developer." })
        }
    }
}

export default new CaptchaController();