global class TalonOneManagementAPI {
	private String token;		 
	private String email;
	private String password;
	private String subdomain;
	private Integer appId = 1;
	private Integer campaignId = 1;
		
	public TalonOneManagementAPI(String subdomain, String email, String password, Integer appId, Integer campaignId) {
		this.subdomain = subdomain;
		this.appId = appId;
		this.campaignId = campaignId;
		this.email = email;
		this.password = password;
	}
		
	public Boolean CreateSession() {
		Map<String, String> credentials = new Map<String, String>{};
		credentials.put('email', email);
		credentials.put('password', password);
		String json = System.JSON.serialize(credentials);
				
		Http http = new Http();
		HttpRequest req = new HttpRequest();
		req.setEndpoint('https://'+subdomain+'.talon.one/v1/sessions');
		req.setMethod('POST');
		req.setBody(json);
				
		try {
			HttpResponse res = http.send(req);
			Map<String, Object> m = (Map<String, Object>)System.JSON.deserializeUntyped(res.getBody());
			token = (String)m.get('token');
			return true;
		} catch (System.CalloutException e) {
			System.debug('Callout exception: '+e);
		}
		return false;
	}
		
	public void DeleteSession() {
		Http http = new Http();
		HttpRequest req = new HttpRequest();
		req.setEndpoint('https://'+subdomain+'.talon.one/v1/sessions');
		req.setMethod('DELETE');
		try {
			HttpResponse res = http.send(req);
		} catch (System.CalloutException e) {
			System.debug('Callout exception: '+e);
		}
	}
		
	public String CreateNewCoupon() {
		Map<String, Object> couponReq = new Map<String, Object>{};
		couponReq.put('usageLimit', 1);
		couponReq.put('numberOfCoupons', 1);
		couponReq.put('couponPattern', 'DEAL-####-####');
		couponReq.put('validCharacters', new String[]{'1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','J','K','L','M','N','P','Q','R','S','T','U','V','W','X','Y','Z'});
				
		String json = System.JSON.serialize(couponReq);
				
		Http http = new Http();
		HttpRequest req = new HttpRequest();
		req.setHeader('Authorization','Bearer '+token);
		req.setEndpoint('https://'+subdomain+'.talon.one/v1/applications/'+appId+'/campaigns/'+campaignId+'/coupons');
		req.setMethod('POST');
		req.setBody(json);
				
		try {
			HttpResponse res = http.send(req);
			Map<String, Object> m = (Map<String, Object>)System.JSON.deserializeUntyped(res.getBody());
			System.debug(m);
						
			Object[] objs = (Object[])m.get('data');
			Map<String, Object> coupon = (Map<String, Object>)objs[0];
						
			System.debug('CreateNewCoupon: '+coupon.get('value'));
			return (String)coupon.get('value');
		} catch (System.CalloutException e) {
			System.debug('Callout exception: '+e);
		}
		return NULL;
	}
		
	public void TestCreateNewCoupon() {
		if (CreateSession()) {
			String coupon = CreateNewCoupon();
			ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.INFO, 'Talon.One Coupon: '+coupon));
			DeleteSession();
		}
	}
	
	webService static String NewCouponService(Id id) { 
		TalonOneManagementAPI t = new TalonOneManagementAPI('yourdomain', 'email@example.org', 'password', 1, 1);
		String coupon = 'Error';
		if (t.CreateSession()) {
			coupon = t.CreateNewCoupon();
			t.DeleteSession();
		}
		return coupon;
	}
}