'use strict';

var request;
var defaults = {
	baseUrl: 'https://api.name.com/v4/'
};

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

	var plugin = {
		init: function(opts) {
			request = opts.request;
			return null;
		},

		// We must list all zones (domains) in the account
		zones: function(data) {
			return api({
				url: baseUrl + '/domains'
			}).then(function(resp) {
				return resp.body.domains.map(function(d) {
					//#console.log("Domain Name:", d.domainName);
					return d.domainName;
				});
			});
		},

		// We must set each record as required
		set: function(data) {
			// console.log('Add TXT', data);
			var ch = data.challenge;
			if (!ch.dnsZone) {
				throw new Error(
					'[Name.com Plugin] Unknown domain: ',
					data.domain || data.dnsHost
				);
			}
			return api({
				method: 'POST',
				url: baseUrl + '/domains/' + ch.dnsZone + '/records',
				json: {
					host: ch.dnsPrefix,
					type: 'TXT',
					answer: ch.dnsAuthorization,
					ttl: 300 // minimum allowed value
				}
			}).then(function(resp) {
				if (!resp.body.id) {
					throw Error('[Name.com API] [set] ' + resp.body);
				}
				return null;
			});
		},

		// We must be able to confirm that the appropriate records were set
		get: function(data) {
			// console.log('List TXT', data);
			var ch = data.challenge;
			if (!ch.dnsZone) {
				throw new Error(
					'[Name.com Plugin] Unknown domain: ',
					data.domain || data.dnsHost
				);
			}
			return api({
				url: baseUrl + '/domains/' + ch.dnsZone + '/records'
			}).then(function(resp) {
				var value = resp.body.records.filter(function(r) {
					return (
						r.host === ch.dnsPrefix &&
						'TXT' === r.type &&
						ch.dnsAuthorization === r.answer
					);
				})[0];
				if (!value) {
					return null;
				}
				// adding id to make re-usable for remove
				return { id: value.id, dnsAuthorization: value.answer };
			});
		},

		// We must delete junk records once we're done
		remove: function(data) {
			// console.log('Remove TXT', data);
			var ch = data.challenge;
			return plugin.get(data).then(function(r) {
				if (!r.id) {
					throw new Error(
						'[Name.com Plugin] [del] Did not find TXT record for ' +
							ch.dnsHost
					);
				}
				return api({
					method: 'DELETE',
					url: baseUrl + '/domains/' + ch.dnsZone + '/records/' + r.id
				}).then(function(resp) {
					return null;
				});
			});
		}
	};

	// Authentication and Error handling here
	function api(opts) {
		opts.auth = {
			user: username,
			pass: token,
			sendImmediately: true
		};
		if (!opts.json) {
			opts.json = true;
		}
		return request(opts).then(function(resp) {
			if (!resp.body.message) {
				return resp;
			}

			console.error(opts.method + ' ' + opts.url);
			console.error(resp.headers);
			console.error(resp.body);
			throw new Error(
				'[Name.com API] ' +
					(opts.method || 'GET') +
					' ' +
					opts.url +
					' : ' +
					resp.body.message
			);
		});
	}

	return plugin;
};