'use strict';

exports = module.exports = {
    removePrivateFields,
    injectPrivateFields,
    upsert,
    get,
    del,
    wait,
    verifyDomainConfig
};

const { ApiClient, Language } = require('domrobot-client'),
    assert = require('node:assert'),
    BoxError = require('../boxerror.js'),
    constants = require('../constants.js'),
    debug = require('debug')('box:dns/inwx'),
    dig = require('../dig.js'),
    dns = require('../dns.js'),
    safe = require('safetydance'),
    waitForDns = require('./waitfordns.js');

function formatError(response) {
    return `INWX Api error error [Code: [${response.code}]  Message: ${response.msg}`;
}

function removePrivateFields(domainObject) {
    domainObject.config.password = constants.SECRET_PLACEHOLDER;
    return domainObject;
}

function injectPrivateFields(newConfig, currentConfig) {
    if (newConfig.password === constants.SECRET_PLACEHOLDER) newConfig.password = currentConfig.password;
}

// https://www.inwx.com/en/help/apidoc/f/ch04.html
function translateError(response) {
    if (response.code === 2200 || response.code === 2201 || response.code === 2202) throw new BoxError(BoxError.ACCESS_DENIED, formatError(response));
    if (response.code === 2003 || response.code === 2004 || response.code === 2005) throw new BoxError(BoxError.BAD_FIELD, formatError(response));
    if (response.code !== 1000) throw new BoxError(BoxError.EXTERNAL_ERROR, formatError(response));
}

async function login(domainConfig) {
    const apiClient = new ApiClient(ApiClient.API_URL_LIVE, Language.EN, false /* debug mode */);

    const sharedSecret = ''; // 2FA
    const [error, response] = await safe(apiClient.login(domainConfig.username, domainConfig.password, sharedSecret));
    if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
    if (response.code !== 1000) throw new BoxError(BoxError. ACCESS_DENIED, `Api login error. Code: ${response.code}  Message: ${response.msg}`);

    return apiClient;
}

async function getDnsRecords(domainConfig, apiClient, zoneName, fqdn, type) {
    assert.strictEqual(typeof domainConfig, 'object');
    assert.strictEqual(typeof apiClient, 'object');
    assert.strictEqual(typeof zoneName, 'string');
    assert.strictEqual(typeof fqdn, 'string');
    assert.strictEqual(typeof type, 'string');

    debug(`getDnsRecords: ${fqdn} in zone ${zoneName} of type ${type}`);

    const [error, response] = await safe(apiClient.callApi('nameserver.info', { domain: zoneName, name: fqdn, type }));
    if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
    if (response.code !== 1000) throw translateError(response);

    return response.resData.record || []; // 'record' property will be missing if no records
}

async function upsert(domainObject, location, type, values) {
    assert.strictEqual(typeof domainObject, 'object');
    assert.strictEqual(typeof location, 'string');
    assert.strictEqual(typeof type, 'string');
    assert(Array.isArray(values));

    const domainConfig = domainObject.config,
        zoneName = domainObject.zoneName;

    debug(`upsert: ${location} in zone ${zoneName} of type ${type} with values ${JSON.stringify(values)}`);

    const apiClient = await login(domainConfig);
    const fqdn = dns.fqdn(location, domainObject.domain);
    const records = await getDnsRecords(domainConfig, apiClient, zoneName, fqdn, type);

    let i = 0; // // used to track available records to update instead of create

    for (let value of values) {
        let priority = 0;

        if (type === 'MX') {
            priority = parseInt(value.split(' ')[0], 10);
            value = value.split(' ')[1];
        }

        if (i >= records.length) { // create a new record
            const data = {
                type,
                name: fqdn,
                domain: zoneName,
                content: value,
                prio: priority,
                ttl: 300  // 300 to 2764800
            };
            const [error, response] = await safe(apiClient.callApi('nameserver.createRecord', data));
            if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
            if (response.code !== 1000) throw translateError(response);
        } else { // replace existing record
            const data = {
                id: records[i].id,
                type,
                name: fqdn,
                content: value,
            };
            const [error, response] = await safe(apiClient.callApi('nameserver.updateRecord', data));
            if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
            if (response.code !== 1000) throw translateError(response);
            ++i; // increment, as we have consumed the record
        }
    }

    for (let j = values.length + 1; j < records.length; j++) {
        const [error, response] = await safe(apiClient.callApi('nameserver.deleteRecord', { id: records[j].id }));
        if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
        if (response.code !== 1000) throw translateError(response);
    }
}

async function get(domainObject, location, type) {
    assert.strictEqual(typeof domainObject, 'object');
    assert.strictEqual(typeof location, 'string');
    assert.strictEqual(typeof type, 'string');

    const domainConfig = domainObject.config,
        zoneName = domainObject.zoneName;

    const apiClient = await login(domainConfig);
    const fqdn = dns.fqdn(location, domainObject.domain);
    const result = await getDnsRecords(domainConfig, apiClient, zoneName, fqdn, type);
    const tmp = result.map(function (record) { return record.content; });
    return tmp;
}

async function del(domainObject, location, type, values) {
    assert.strictEqual(typeof domainObject, 'object');
    assert.strictEqual(typeof location, 'string');
    assert.strictEqual(typeof type, 'string');
    assert(Array.isArray(values));

    const domainConfig = domainObject.config,
        zoneName = domainObject.zoneName;

    debug(`del: ${location} in zone ${zoneName} of type ${type} with values ${JSON.stringify(values)}`);

    const apiClient = await login(domainConfig);
    const fqdn = dns.fqdn(location, domainObject.domain);
    const result = await getDnsRecords(domainConfig, apiClient, zoneName, fqdn, type);
    if (result.length === 0) return;

    const tmp = result.filter(function (record) { return values.some(function (value) { return value === record.content; }); });
    debug('del: %j', tmp);

    for (const r of tmp) {
        const [error, response] = await safe(apiClient.callApi('nameserver.deleteRecord', { id: r.id }));
        if (error) throw new BoxError(BoxError.NETWORK_ERROR, error);
        if (response.code !== 1000) throw translateError(response);
    }
}

async function wait(domainObject, subdomain, type, value, options) {
    assert.strictEqual(typeof domainObject, 'object');
    assert.strictEqual(typeof subdomain, 'string');
    assert.strictEqual(typeof type, 'string');
    assert.strictEqual(typeof value, 'string');
    assert(options && typeof options === 'object'); // { interval: 5000, times: 50000 }

    const fqdn = dns.fqdn(subdomain, domainObject.domain);

    await waitForDns(fqdn, domainObject.zoneName, type, value, options);
}

async function verifyDomainConfig(domainObject) {
    assert.strictEqual(typeof domainObject, 'object');

    const domainConfig = domainObject.config,
        zoneName = domainObject.zoneName;

    if (typeof domainConfig.username !== 'string') throw new BoxError(BoxError.BAD_FIELD, 'username must be a string');
    if (typeof domainConfig.password !== 'string') throw new BoxError(BoxError.BAD_FIELD, 'password must be a string');
    if ('customNameservers' in domainConfig && typeof domainConfig.customNameservers !== 'boolean') throw new BoxError(BoxError.BAD_FIELD, 'customNameservers must be a boolean');

    const credentials = {
        username: domainConfig.username,
        password: domainConfig.password,
        customNameservers: !!domainConfig.customNameservers
    };

    const ip = '127.0.0.1';

    if (constants.TEST) return credentials; // this shouldn't be here

    const [error, nameservers] = await safe(dig.resolve(zoneName, 'NS', { timeout: 5000 }));
    if (error && error.code === 'ENOTFOUND') throw new BoxError(BoxError.BAD_FIELD, 'Unable to resolve nameservers for this domain');
    if (error || !nameservers) throw new BoxError(BoxError.BAD_FIELD, error ? error.message : 'Unable to get nameservers');

    if (!nameservers.every(function (n) { return n.toLowerCase().search(/inwx|xnameserver|domrobot/) !== -1; })) {
        debug('verifyDomainConfig: %j does not contain INWX NS', nameservers);
        if (!domainConfig.customNameservers) throw new BoxError(BoxError.BAD_FIELD, 'Domain nameservers are not set to INWX');
    }

    const location = 'cloudrontestdns';

    await upsert(domainObject, location, 'A', [ ip ]);
    debug('verifyDomainConfig: Test A record added');

    await del(domainObject, location, 'A', [ ip ]);
    debug('verifyDomainConfig: Test A record removed again');

    return credentials;
}