'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;

	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;
			//console.log('DEBUG >>> ch: ' + JSON.stringify(ch, null, 2));
			var txt = ch.dnsAuthorization;
			//console.log('DEBUG >>> txt: ' + txt);
			
			return api('POST', '/' + account + '/zones/' + ch.dnsZone + '/records', {
				name: '',
				type: 'TXT',
				content: txt
			}).then(function(resp) {
				//console.log('DEBUG >>> resp: ' + JSON.stringify(resp, null, 2));
				
				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);
	
			return api('GET', '/' + account + '/zones/' + data.challenge.dnsZone + '/records')
				.then(function(resp) {

					var txtRecord = resp.body.data.filter(function (record) {
						return data.challenge.dnsAuthorization === record.content;
					})[0];
					
					//console.log('DEBUG >>> txtRecord: ' + JSON.stringify(txtRecord,null,2));
					if(txtRecord) return { dnsAuthorization: txtRecord.content };
					else return null;
					
				});

		},
		remove: function(data) {

			return api('GET', '/' + account + '/zones/' + data.challenge.dnsZone + '/records')
				.then(function(resp) {

					var record = resp.body.data.filter(function (record) {
						return data.challenge.dnsAuthorization === record.content;
					})[0];

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

	// Authentication and Error handling here
	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;
		});
	}

};