/*
* https://gitgud.io/ahsk/clewd
* https://github.com/h-a-s-k/clewd
*/
'use strict';

const {randomInt, randomBytes} = require('node:crypto'), {version: Version} = require('../package.json'), Encoder = (new TextDecoder, 
new TextEncoder), Main = 'clewd v' + Version + '修改版 by tera', Replacements = {
    user: 'Human',
    assistant: 'Assistant',
    system: '',
    example_user: 'H',
    example_assistant: 'A'
}, DangerChars = [ ...new Set([ ...Object.values(Replacements).join(''), ...'\n', ...':', ...'\\n' ]) ].filter((char => ' ' !== char)).sort(), AI = {
    end: () => Buffer.from([ 104, 116, 116, 112, 115, 58, 47, 47, 99, 108, 97, 117, 100, 101, 46, 97, 105 ]).toString(),
    mdl: () => Buffer.from([ 99, 108, 97, 117, 100, 101, 45, 50 ]).toString(),
    zone: () => Buffer.from([ 65, 109, 101, 114, 105, 99, 97, 47, 78, 101, 119, 95, 89, 111, 114, 107 ]).toString(),
    agent: () => Buffer.from([ 77, 111, 122, 105, 108, 108, 97, 47, 53, 46, 48, 32, 40, 77, 97, 99, 105, 110, 116, 111, 115, 104, 59, 32, 73, 110, 116, 101, 108, 32, 77, 97, 99, 32, 79, 83, 32, 88, 32, 49, 48, 95, 49, 53, 95, 55, 41, 32, 65, 112, 112, 108, 101, 87, 101, 98, 75, 105, 116, 47, 53, 51, 55, 46, 51, 54, 32, 40, 75, 72, 84, 77, 76, 44, 32, 108, 105, 107, 101, 32, 71, 101, 99, 107, 111, 41, 32, 67, 104, 114, 111, 109, 101, 47, 49, 49, 52, 46, 48, 46, 48, 46, 48, 32, 83, 97, 102, 97, 114, 105, 47, 53, 51, 55, 46, 51, 54, 32, 69, 100, 103, 47, 49, 49, 52, 46, 48, 46, 49, 56, 50, 51, 46, 55, 57 ]).toString(),
    cp: () => Buffer.from([ 55, 55, 49, 44, 52, 56, 54, 53, 45, 52, 56, 54, 54, 45, 52, 56, 54, 55, 45, 52, 57, 49, 57, 53, 45, 52, 57, 49, 57, 57, 45, 52, 57, 49, 57, 54, 45, 52, 57, 50, 48, 48, 45, 53, 50, 51, 57, 51, 45, 53, 50, 51, 57, 50, 45, 52, 57, 49, 55, 49, 45, 52, 57, 49, 55, 50, 45, 49, 53, 54, 45, 49, 53, 55, 45, 52, 55, 45, 53, 51, 44, 48, 45, 50, 51, 45, 54, 53, 50, 56, 49, 45, 49, 48, 45, 49, 49, 45, 51, 53, 45, 49, 54, 45, 53, 45, 49, 51, 45, 49, 56, 45, 53, 49, 45, 52, 53, 45, 52, 51, 45, 50, 55, 45, 49, 55, 53, 49, 51, 45, 50, 49, 44, 50, 57, 45, 50, 51, 45, 50, 52, 44, 48 ]).toString(),
    hdr: refPath => ({
        'Content-Type': 'application/json',
        Referer: `${AI.end()}/${refPath ? 'chat/' + refPath : ''}`,
        Origin: '' + AI.end()
    })
}, indexOfH = (text, last = false) => {
    let location = -1;
    const matchesH = text.match(/(?:(?:\\n)|\n){2}((?:Human|H): ?)/gm);
    matchesH?.length > 0 && (location = last ? text.lastIndexOf(matchesH[matchesH.length - 1]) : text.indexOf(matchesH[0]));
    return location;
}, indexOfA = (text, last = false) => {
    let location = -1;
    const matchesA = text.match(/(?:(?:\\n)|\n){2}((?:Assistant|A): ?)/gm);
    matchesA?.length > 0 && (location = last ? text.lastIndexOf(matchesA[matchesA.length - 1]) : text.indexOf(matchesA[0]));
    return location;
};

module.exports.encodeDataJSON = completion => Encoder.encode(`data: ${JSON.stringify(completion)}\n\n`);

module.exports.genericFixes = text => text.replace(/(\r\n|\r|\\n)/gm, '\n');

module.exports.Replacements = Replacements;

module.exports.DangerChars = DangerChars;

module.exports.checkResErr = async (res, throwIt = true) => {
    let err, json, errAPI;
    if ('string' == typeof res) {
        json = JSON.parse(res);
        errAPI = json.error;
        err = Error(errAPI.message);
    } else if (res.status < 200 || res.status >= 300) {
        err = Error('Unexpected response code: ' + (res.status || json.status));
        json = await res.json();
        errAPI = json.error;
    }
    if (errAPI) {
        err.status = res.status || json.status;
        err.planned = true;
        errAPI.message && (err.message = errAPI.message);
        errAPI.type && (err.type = errAPI.type);
        if ((429 === res.status || 429 === json.status) && errAPI.resets_at) {
            const hours = ((new Date(1e3 * errAPI.resets_at).getTime() - Date.now()) / 1e3 / 60 / 60).toFixed(1);
            err.message += `, expires in ${hours} hours`;
        }
        if (throwIt) {
            throw err;
        }
    }
    return err;
};

module.exports.bytesToSize = (bytes = 0) => {
    const b = [ 'B', 'KB', 'MB', 'GB', 'TB' ];
    if (0 === bytes) {
        return '0 B';
    }
    const c = Math.min(Math.floor(Math.log(bytes) / Math.log(1024)), 4);
    return 0 === c ? `${bytes} ${b[c]}` : `${(bytes / 1024 ** c).toFixed(1)} ${b[c]}`;
};

module.exports.indexOfAny = (text, last = false) => {
    let location = -1;
    const fakes = [ indexOfH(text, last), indexOfA(text, last) ].filter((idx => idx > -1)).sort();
    location = last ? fakes.reverse()[0] : fakes[0];
    return isNaN(location) ? -1 : location;
};

module.exports.cleanJSON = json => json.replace(/^data: {/gim, '{').replace(/\s+$/gim, '');

module.exports.fileName = () => {
    const len = randomInt(5, 15);
    let name = randomBytes(len).toString('hex');
    for (let i = 0; i < name.length; i++) {
        const char = name.charAt(i);
        isNaN(char) && randomInt(1, 5) % 2 == 0 && ' ' !== name.charAt(i - 1) && (name = name.slice(0, i) + ' ' + name.slice(i));
    }
    return name + '.txt';
};

module.exports.indexOfA = indexOfA;

module.exports.indexOfH = indexOfH;

module.exports.setTitle = title => {
    title = `${Main} - ${title}`;
    process.title !== title && (process.title = title);
};

module.exports.Main = Main;

module.exports.AI = AI;