'use strict';

var request;
var defaults = {
	baseUrl: 'https://api.dnsimple.com/v2/'
};

module.exports.create = function(config) {
	var baseUrl = (config.baseUrl || defaults.baseUrl).replace(/\/$/, '');
	var token = config.token;
	var account = config.account;

	function api(method, path, form) {
		var req = {
			method: method,
			url: baseUrl + path,
			headers: {
				Authorization: 'Bearer ' + token,
				'Content-Type': 'application/json'
			},
			json: true,
			form: form
		};
		return request(req).then(function(resp) {
			if (2 !== Math.floor(resp.statusCode / 100)) {
				console.error(resp.statusCode, req.url);
				console.error();
				console.error('Request:');
				console.error(req);
				console.error();
				console.error('Response:');
				console.error(resp.body);
				console.error();
				throw new Error(
					'Error response. Check token, baseUrl, domains, etc.'
				);
			}
			return resp;
		});
	}

	return {
		init: function(opts) {
			request = opts.request;
			return null;
		},
		zones: function(data) {
			// console.info('List Zones', data);

			return api('GET', '/' + account + '/zones').then(function(resp) {
				return resp['body']['data'].map(function(elem) {
					//console.log('DEBUG >>> elem.name: ' + elem.name);
					return elem.name;
				});
			});
		},
		set: function(data) {
			// console.info('Add TXT', data);
			var ch = data.challenge;

			if (!ch.dnsZone) {
				throw new Error('No matching zone for ' + ch.dnsHost);
			}
			var txt = ch.dnsAuthorization;

			return api(
				'POST',
				'/' + account + '/zones/' + ch.dnsZone + '/records',
				{
					name: ch.dnsPrefix,
					type: 'TXT',
					content: txt
				}
			).then(function(resp) {
				if (resp.statusCode === 201) {
					return true;
				}
				throw new Error(
					'record did not set. check subdomain, api key, etc'
				);
			});
		},
		get: function(data) {
			// console.info('List TXT', data);
			var ch = data.challenge;

			// TODO use :name_like
			// https://developer.dnsimple.com/v2/zones/records/
			return api(
				'GET',
				'/' + account + '/zones/' + data.challenge.dnsZone + '/records'
			).then(function(resp) {
				var record = resp.body.data.filter(function(record) {
					return (
						ch.dnsPrefix === record.name &&
						ch.dnsAuthorization === record.content
					);
				})[0];

				if (record) {
					return { dnsAuthorization: record.content };
				}

				return null;
			});
		},
		remove: function(data) {
			// console.info('Remove TXT', data);
			var ch = data.challenge;

			return api(
				'GET',
				'/' + account + '/zones/' + data.challenge.dnsZone + '/records'
			).then(function(resp) {
				var record = resp.body.data.filter(function(record) {
					return (
						ch.dnsPrefix === record.name &&
						ch.dnsAuthorization === record.content
					);
				})[0];

				if (!record) {
					throw new Error('Txt Record not found for removal');
				}
				return api(
					'DELETE',
					'/' +
						account +
						'/zones/' +
						ch.dnsZone +
						'/records/' +
						record.id
				).then(function(resp) {
					// console.info('DEBUG >>> resp: ', JSON.stringify(resp, null, 2));
					return true;
				});
			});
		}
	};
};