diff --git a/CMakeLists.txt b/CMakeLists.txt
index d450514..242885a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,28 @@ find_package(X11 REQUIRED)
 
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -fsanitize=address -pg")
 
+include(FetchContent)
+
+FetchContent_Declare(
+	unity
+	GIT_REPOSITORY https://github.com/ThrowTheSwitch/Unity.git
+	GIT_TAG v2.6.1
+)
+
+FetchContent_Declare(
+	zlog
+	GIT_REPOSITORY https://github.com/HardySimpson/zlog.git
+	GIT_TAG 1.2.18
+)
+
+FetchContent_Declare(
+	argparse
+	GIT_REPOSITORY https://github.com/cofyc/argparse.git
+	GIT_TAG 682d4520b4bc2b646cdfcf078b2fed00b3d2da30
+)
+
+FetchContent_MakeAvailable(unity zlog argparse)
+
 add_library(libaswm
 	src/aswm/aswm.c
 	src/aswm/mapper/mapper.c
@@ -21,27 +43,20 @@ add_library(libaswm
 	src/aswm/event_handlers/message.c
 	src/aswm/log/log.c
 )
-target_include_directories(libaswm PUBLIC ${X11_INCLUDE_DIR} src)
-target_link_libraries(libaswm ${X11_LIBRARIES})
+target_include_directories(libaswm PUBLIC ${X11_INCLUDE_DIR} src
+	${zlog_SOURCE_DIR}/src)
+target_link_libraries(libaswm ${X11_LIBRARIES} zlog)
 
-add_executable(aswm src/aswm/main.c)
+add_executable(aswm src/aswm/main.c ${argparse_SOURCE_DIR}/argparse.c)
+target_include_directories(aswm PUBLIC ${argparse_SOURCE_DIR})
 target_link_libraries(aswm libaswm)
 
-include(FetchContent)
-
-FetchContent_Declare(
-	unity
-	GIT_REPOSITORY https://github.com/ThrowTheSwitch/Unity.git
-	GIT_TAG v2.6.1
-)
-
-FetchContent_MakeAvailable(unity)
-
+add_compile_definitions(ASWM_TEST_DIR="${CMAKE_CURRENT_SOURCE_DIR}/test/")
 add_executable(test_aswm
 	test/test_set_up.c
 	test/aswm/test_aswm.c
 )
-target_include_directories(test_aswm PUBLIC unity)
+target_include_directories(test_aswm PUBLIC ${unity_SOURCE_DIR}/src)
 target_link_libraries(test_aswm libaswm unity)
 
 enable_testing()
diff --git a/src/aswm/aswm.c b/src/aswm/aswm.c
index ff5dbfe..a87e8b7 100644
--- a/src/aswm/aswm.c
+++ b/src/aswm/aswm.c
@@ -16,8 +16,9 @@
 
 Aswm _aswm;
 
+void aswm_open(const char* zlog_conf) {
+	set_up_logger(zlog_conf);
 
-void aswm_open() {
 	_aswm.display = XOpenDisplay(NULL);
 	_aswm.desktops = malloc(0);
 	_aswm.desktops_count = 0;
@@ -44,14 +45,11 @@ void aswm_open() {
 	XMapWindow(_aswm.display, _aswm.root_window);
 	XSync(_aswm.display, 0);
 
-	printf("PointerRoot %lu\n", PointerRoot);
-	printf("Useful constants:\n");
-	printf("\tNone: %lu\n", None);
-	printf("\tTrue / False: %i / %i\n", True, False);
-	printf("X Root window %lu\n", x_root_window);
-	printf("ASWM Root window %lu\n", _aswm.root_window);
+	aswm_debug("PointerRoot %lu", PointerRoot);
+	aswm_debug("X Root window %lu", x_root_window);
+	aswm_debug("ASWM Root window %lu", _aswm.root_window);
 
-	log_tree(&_aswm, DefaultRootWindow(_aswm.display), 1);
+	aswm_log_tree(aswm_debug, &_aswm, DefaultRootWindow(_aswm.display), 1);
 
 	atexit(aswm_close);
 }
@@ -84,39 +82,10 @@ void aswm_create_workspace() {
 	XSelectInput(_aswm.display, _aswm.current_desktop.stack_root, SubstructureNotifyMask);
 	XMapWindow(_aswm.display, _aswm.current_desktop.root_window);
 	XMapWindow(_aswm.display, _aswm.current_desktop.tile_root);
-	printf("Create workspace %lu\n", _aswm.current_desktop.root_window);
+	aswm_notice("Create workspace %lu", _aswm.current_desktop.root_window);
 }
 
 void aswm_event_loop() {
-	printf("MotionNofity %i\n", MotionNotify);
-	printf("ButtonPress %i\n", ButtonPress);
-	printf("ButtonRelease %i\n", ButtonRelease);
-	printf("ColormapNotify %i\n", ColormapNotify);
-	printf("EnterNotify %i\n", EnterNotify);
-	printf("LeaveNotify %i\n", LeaveNotify);
-	printf("Expose %i\n", Expose);
-	printf("GraphicsExpose %i\n", GraphicsExpose);
-	printf("NoExpose %i\n", NoExpose);
-	printf("FocusIn %i\n", FocusIn);
-	printf("FocusOut %i\n", FocusOut);
-	printf("KeymapNotify %i\n", KeymapNotify);
-	printf("KeyPress %i\n", KeyPress);
-	printf("KeyRelease %i\n", KeyRelease);
-	printf("MotionNofity %i\n", MotionNotify);
-	printf("PropertyNotify %i\n", PropertyNotify);
-	printf("ResizeRequest %i\n", ResizeRequest);
-	printf("CirculateNotify %i\n", CirculateNotify);
-	printf("ConfigureNotify %i\n", ConfigureNotify);
-	printf("DestroyNotify %i\n", DestroyNotify);
-	printf("GravityNotify %i\n", GravityNotify);
-	printf("MapNotify %i\n", MapNotify);
-	printf("ReparentNotify %i\n", ReparentNotify);
-	printf("UnmapNotify %i\n", UnmapNotify);
-	printf("CirculateRequest %i\n", CirculateRequest);
-	printf("ConfigureRequest %i\n", ConfigureRequest);
-	printf("MapRequest %i\n", MapRequest);
-	printf("VisibilityNotify %i\n", VisibilityNotify);
-
 	for (;;) {
 		XEvent e;
 		XNextEvent(_aswm.display, &e);
@@ -128,7 +97,7 @@ void aswm_event_loop() {
 				if(e.xcreatewindow.override_redirect == False)
 					OnCreateNotify(&_aswm, &e.xcreatewindow);
 				else
-					printf("Ignored create notify %lu\n", e.xcreatewindow.window);
+					aswm_notice("Ignored create notify %lu", e.xcreatewindow.window);
 				break;
 			case ConfigureRequest:
 				OnConfigureRequest(&e.xconfigurerequest);
@@ -146,26 +115,26 @@ void aswm_event_loop() {
 				OnReparentNotify(&e.xreparent);
 				break;
 			case FocusIn:
-				printf("FocusIn %lu\n", (&e.xfocus)->window);
+				aswm_debug("FocusIn %lu", (&e.xfocus)->window);
 				break;
 			case FocusOut:
-				printf("FocusOut %lu\n", e.xfocus.window);
+				aswm_debug("FocusOut %lu", e.xfocus.window);
 				break;
 			case EnterNotify:
 				int revert_to;
 				Window window;
 				XGetInputFocus(e.xcrossing.display, &window, &revert_to);
-				printf("Enter %lu\n", e.xcrossing.window);
-				printf("Input focus %lu\n", window);
+				aswm_debug("Enter %lu", e.xcrossing.window);
+				aswm_debug("Input focus %lu", window);
 				break;
 			case LeaveNotify:
-				printf("Leave %lu\n", e.xcrossing.window);
+				aswm_debug("Leave %lu", e.xcrossing.window);
 				break;
 			case ButtonPress:
-				printf("Press %lu\n", e.xbutton.window);
+				aswm_debug("Press %lu", e.xbutton.window);
 				break;
 			case ButtonRelease:
-				printf("Release %lu\n", e.xbutton.window);
+				aswm_debug("Release %lu", e.xbutton.window);
 				break;
 			case ClientMessage:
 				OnClientMessage(&_aswm, &e.xclient);
@@ -174,7 +143,7 @@ void aswm_event_loop() {
 				OnPropertyNotify(&_aswm, &e.xproperty);
 				break;
 			default:
-				printf("Unknown event: %i\n", e.type);
+				aswm_debug("Unknown event: %i", e.type);
 				break;
 					/* LOG(WARNING) << "Ignored event"; */
 		}
@@ -183,6 +152,7 @@ void aswm_event_loop() {
 
 void aswm_close() {
 	free(_aswm.desktops);
+	tear_down_logger();
 	XCloseDisplay(_aswm.display);
 }
 
@@ -203,7 +173,7 @@ void aswm_activate_window(Window window) {
 	/* event.xclient.data.l[1] = 1; // Timestamp // Currently not set */
 	/* event.xclient.data.l[2] = 0; // Requestor's currently active window: TODO */
 	
-	printf("Activate window %lu (currently active: %lu)\n", window, aswm_currently_active());
+	aswm_notice("Activate window %lu (currently active: %lu)", window, aswm_currently_active());
 	/* XSendEvent(_aswm.display, _aswm.root_window, True, 0 [> N. A. <], &event); */
 	XSetInputFocus(_aswm.display, window, RevertToParent, CurrentTime);
 }
diff --git a/src/aswm/aswm.h b/src/aswm/aswm.h
index 80a2134..d7fc833 100644
--- a/src/aswm/aswm.h
+++ b/src/aswm/aswm.h
@@ -1,6 +1,7 @@
 #ifndef ASWM
 #define ASWM
 
+#include "zlog.h"
 #include "mapper/mapper.h"
 
 typedef struct {
@@ -17,7 +18,7 @@ typedef struct {
 	Desktop current_desktop;
 } Aswm;
 
-void aswm_open();
+void aswm_open(const char* zlog_conf);
 void aswm_create_workspace();
 void aswm_event_loop();
 void aswm_close();
diff --git a/src/aswm/event_handlers/configure.c b/src/aswm/event_handlers/configure.c
index 937211b..732b87d 100644
--- a/src/aswm/event_handlers/configure.c
+++ b/src/aswm/event_handlers/configure.c
@@ -1,10 +1,10 @@
 #include "configure.h"
-#include <stdio.h>
+#include "aswm/log/log.h"
 
 void OnConfigureRequest(const XConfigureRequestEvent* e) {
-	  printf("XConfigureRequestEvent %lu (ignored)\n", e->window);
-	  printf("\tx = %i\n", e->x);
-	  printf("\ty = %i\n", e->y);
-	  printf("\tw = %i\n", e->width);
-	  printf("\th = %i\n", e->height);
+	  aswm_info("XConfigureRequestEvent %lu (ignored)", e->window);
+	  aswm_info("\tx = %i", e->x);
+	  aswm_info("\ty = %i", e->y);
+	  aswm_info("\tw = %i", e->width);
+	  aswm_info("\th = %i", e->height);
 }
diff --git a/src/aswm/event_handlers/create.c b/src/aswm/event_handlers/create.c
index ee0d56c..586f86e 100644
--- a/src/aswm/event_handlers/create.c
+++ b/src/aswm/event_handlers/create.c
@@ -1,20 +1,19 @@
 #include "create.h"
-#include <stdio.h>
-#include <string.h>
+#include "aswm/log/log.h"
 #include <X11/Xutil.h>
 
 void OnCreateNotify(Aswm* aswm, const XCreateWindowEvent* e) {
-	printf("XCreateWindowEvent %lu on parent %lu\n", e->window, e->parent);
-	printf("\tx = %i\n", e->x);
-	printf("\ty = %i\n", e->y);
-	printf("\tw = %i\n", e->width);
-	printf("\th = %i\n", e->height);
-	printf("\toverride_redirect = %i\n", e->override_redirect);
+	aswm_info("XCreateWindowEvent %lu on parent %lu", e->window, e->parent);
+	aswm_info("\tx = %i", e->x);
+	aswm_info("\ty = %i", e->y);
+	aswm_info("\tw = %i", e->width);
+	aswm_info("\th = %i", e->height);
+	aswm_info("\toverride_redirect = %i", e->override_redirect);
 
 	XWMHints* hints = XGetWMHints(aswm->display, e->window);
 	if(hints != NULL) {
-		printf("\tWM_HINTS\n");
-		printf("\t\tinitial_state: %i\n", hints->initial_state);
+		aswm_info("\tWM_HINTS");
+		aswm_info("\t\tinitial_state: %i", hints->initial_state);
 	}
 
 	// The WM must subscribe to property changes, notably to implement the
@@ -24,13 +23,13 @@ void OnCreateNotify(Aswm* aswm, const XCreateWindowEvent* e) {
 	{
 		XTextProperty text_property;
 		if(XGetWMName(e->display, e->window, &text_property)) {
-			printf("\tname: %s\n", text_property.value);
+			aswm_info("\tname: %s", text_property.value);
 		}
 	}
 	{
 		XClassHint class;
 		if(XGetClassHint(e->display, e->window, &class)) {
-			printf("\tclass: %s, %s\n", class.res_class, class.res_name);
+			aswm_info("\tclass: %s, %s", class.res_class, class.res_name);
 			XFree(class.res_class);
 			XFree(class.res_name);
 		}
diff --git a/src/aswm/event_handlers/destroy.c b/src/aswm/event_handlers/destroy.c
index 635c844..19b9080 100644
--- a/src/aswm/event_handlers/destroy.c
+++ b/src/aswm/event_handlers/destroy.c
@@ -1,7 +1,7 @@
 #include "destroy.h"
-#include <stdio.h>
+#include "aswm/log/log.h"
 
 void OnDestroyNotify(const XDestroyWindowEvent* e) {
-	printf("XDestroyWindowEvent %lu\n", e->window);
+	aswm_notice("XDestroyWindowEvent %lu", e->window);
 	// TODO: destroy frame
 }
diff --git a/src/aswm/event_handlers/map.c b/src/aswm/event_handlers/map.c
index 60d940a..a4f43e5 100644
--- a/src/aswm/event_handlers/map.c
+++ b/src/aswm/event_handlers/map.c
@@ -1,22 +1,22 @@
 #include "map.h"
-#include <stdio.h>
 #include "aswm/log/log.h"
 #include "aswm/mapper/mapper.h"
+#include "aswm/log/log.h"
 #include "X11/Xutil.h"
 
 void OnMapRequest(Aswm* aswm, const XMapRequestEvent* e) {
-	printf("XMapRequestEvent %lu\n", e->window);
+	aswm_notice("XMapRequestEvent %lu", e->window);
 
 	XSizeHints* size = XAllocSizeHints();
 	long supplied;
 	bool stacked = false;
 	if(XGetWMNormalHints(aswm->display, e->window, size, &supplied)) {
 		if((supplied & (PMinSize | PMaxSize)) && !aswm_is_resizeable(size)) {
-			printf("\tWMNormalHints:\n");
-			printf("\t\tMin w:%i\n", size->min_width);
-			printf("\t\tMin h:%i\n", size->min_height);
-			printf("\t\tMax w:%i\n", size->max_width);
-			printf("\t\tMax h:%i\n", size->max_height);
+			aswm_notice("\tWMNormalHints:");
+			aswm_notice("\t\tMin w:%i", size->min_width);
+			aswm_notice("\t\tMin h:%i", size->min_height);
+			aswm_notice("\t\tMax w:%i", size->max_width);
+			aswm_notice("\t\tMax h:%i", size->max_height);
 			aswm_stack_window(e->display, aswm->current_desktop.stack_root, e->window, size->max_width, size->max_height);
 			stacked = true;
 		}
@@ -26,6 +26,6 @@ void OnMapRequest(Aswm* aswm, const XMapRequestEvent* e) {
 	if(!stacked)
 		aswm_tile_window(e->display, aswm->current_desktop.tile_root, e->window);
 
-	printf("Map tree:\n");
-	log_tree(aswm, DefaultRootWindow(aswm->display), 1);
+	aswm_info("Map tree:\n");
+	aswm_log_tree(aswm_info, aswm, DefaultRootWindow(aswm->display), 1);
 }
diff --git a/src/aswm/event_handlers/message.c b/src/aswm/event_handlers/message.c
index 6f0b083..2a806a6 100644
--- a/src/aswm/event_handlers/message.c
+++ b/src/aswm/event_handlers/message.c
@@ -1,20 +1,19 @@
 #include "message.h"
-#include <stdio.h>
-#include <string.h>
+#include "aswm/log/log.h"
 
 void OnClientMessage(Aswm* aswm, XClientMessageEvent* e) {
 	// TODO: handle this
-	printf("Client message for window %lu:\n", e->window);
+	aswm_notice("Client message for window %lu:", e->window);
 	char* message_type = XGetAtomName(e->display, e->message_type);
-	printf("\t%s\n", message_type);
+	aswm_notice("\t%s", message_type);
 	if(strcmp(message_type, "_NET_ACTIVE_WINDOW") == 0) {
-		printf("\t\twindow to activate: %lu\n", e->window);
-		printf("\t\tsource indication: %lu\n", e->data.l[0]);
-		printf("\t\ttimestamp: %lu\n", e->data.l[1]);
-		printf("\t\trequestor's currently active window: %lu\n", e->data.l[2]);
+		aswm_notice("\t\twindow to activate: %lu", e->window);
+		aswm_notice("\t\tsource indication: %lu", e->data.l[0]);
+		aswm_notice("\t\ttimestamp: %lu", e->data.l[1]);
+		aswm_notice("\t\trequestor's currently active window: %lu", e->data.l[2]);
 		aswm_activate_window(e->window);
 	} else {
-		printf("\t-> Unhandled\n");
+		aswm_notice("\t-> Unhandled");
 	}
 	XFree(message_type);
 }
diff --git a/src/aswm/event_handlers/property.c b/src/aswm/event_handlers/property.c
index be4c4db..528b828 100644
--- a/src/aswm/event_handlers/property.c
+++ b/src/aswm/event_handlers/property.c
@@ -1,78 +1,78 @@
 #include "property.h"
-#include <stdio.h>
 #include <string.h>
+#include "aswm/mapper/mapper.h"
+#include "aswm/log/log.h"
 #include <X11/Xutil.h>
 #include <X11/Xatom.h>
-#include "aswm/mapper/mapper.h"
 
 void OnPropertyNotify(Aswm* aswm, XPropertyEvent* e) {
-	printf("Property change for window %lu:\n", e->window);
+	aswm_notice("Property change for window %lu:", e->window);
 	char* property_name = XGetAtomName(e->display, e->atom);
-	printf("\t%s\n", property_name);
+	aswm_notice("\t%s", property_name);
 	if(strcmp(property_name, "_NET_WM_NAME") == 0) {
-		printf("\t-> Unhandled\n");
+		aswm_notice("\t-> Unhandled");
 		XTextProperty wm_name_property;
 		char** wm_name;
 		int wm_name_count;
 		XGetTextProperty(e->display, e->window, &wm_name_property, e->atom);
 		Xutf8TextPropertyToTextList(e->display, &wm_name_property, &wm_name, &wm_name_count);
 		for(auto i = 0; i < wm_name_count; i++)
-			printf("\t_NET_WM_NAME: %s\n", wm_name[i]);
+			aswm_notice("\t_NET_WM_NAME: %s", wm_name[i]);
 		XFreeStringList(wm_name);
 	} else if(strcmp(property_name, "WM_NAME") == 0) {
-		printf("\t-> Unhandled\n");
+		aswm_notice("\t-> Unhandled");
 		XTextProperty text_property;
 		if(XGetWMName(e->display, e->window, &text_property)) {
-			printf("\tWM_NAME: %s\n", text_property.value);
+			aswm_notice("\tWM_NAME: %s", text_property.value);
 		}
 	} else if(strcmp(property_name, "WM_NORMAL_HINTS") == 0) {
 		XSizeHints* size = XAllocSizeHints();
 			long supplied;
 			if(XGetWMNormalHints(e->display, e->window, size, &supplied)) {
-				printf("\tWMNormalHints:\n");
-				printf("\t\tMin w:%i\n", size->min_width);
-				printf("\t\tMin h:%i\n", size->min_height);
-				printf("\t\tMax w:%i\n", size->max_width);
-				printf("\t\tMax h:%i\n", size->max_height);
-				printf("\t\tBase w:%i\n", size->base_width);
-				printf("\t\tBase h:%i\n", size->base_height);
+				aswm_notice("\tWMNormalHints:");
+				aswm_notice("\t\tMin w:%i", size->min_width);
+				aswm_notice("\t\tMin h:%i", size->min_height);
+				aswm_notice("\t\tMax w:%i", size->max_width);
+				aswm_notice("\t\tMax h:%i", size->max_height);
+				aswm_notice("\t\tBase w:%i", size->base_width);
+				aswm_notice("\t\tBase h:%i", size->base_height);
 				aswm_handle_normal_hints(
 						aswm->display, aswm->current_desktop.stack_root,
 						e->window, size, supplied);
 			}
 			XFree(size);
 	} else if(strcmp(property_name, "WM_HINTS") == 0) {
-		printf("\t-> Unhandled\n");
+		aswm_notice("\t-> Unhandled");
 		XWMHints* hints = XGetWMHints(aswm->display, e->window);
-		printf("\t\tflags Input: %li\n", hints->flags & InputHint);
-		printf("\t\tflags Input: %li\n", hints->flags & StateHint);
-		printf("\t\tflags IconPixmap: %li\n", hints->flags & IconPixmapHint);
-		printf("\t\tflags WindowHint: %li\n", hints->flags & IconWindowHint);
-		printf("\t\tflags IconPosition: %li\n", hints->flags & IconPositionHint);
-		printf("\t\tflags IconMask: %li\n", hints->flags & IconMaskHint);
-		printf("\t\tflags WindowGroup: %li\n", hints->flags & WindowGroupHint);
-		printf("\t\tflags XUrgency: %li\n", hints->flags & XUrgencyHint);
-		printf("\t\tflags AllHints: %li\n", hints->flags & AllHints);
-		printf("\t\tinitial_state: %i\n", hints->initial_state);
+		aswm_notice("\t\tflags Input: %li", hints->flags & InputHint);
+		aswm_notice("\t\tflags Input: %li", hints->flags & StateHint);
+		aswm_notice("\t\tflags IconPixmap: %li", hints->flags & IconPixmapHint);
+		aswm_notice("\t\tflags WindowHint: %li", hints->flags & IconWindowHint);
+		aswm_notice("\t\tflags IconPosition: %li", hints->flags & IconPositionHint);
+		aswm_notice("\t\tflags IconMask: %li", hints->flags & IconMaskHint);
+		aswm_notice("\t\tflags WindowGroup: %li", hints->flags & WindowGroupHint);
+		aswm_notice("\t\tflags XUrgency: %li", hints->flags & XUrgencyHint);
+		aswm_notice("\t\tflags AllHints: %li", hints->flags & AllHints);
+		aswm_notice("\t\tinitial_state: %i", hints->initial_state);
 		XFree(hints);
 	} else if(strcmp(property_name, "WM_PROTOCOLS") == 0) {
-		printf("\t-> Unhandled\n");
+		aswm_notice("\t-> Unhandled");
 		Atom* protocols;
 		int count;
 		XGetWMProtocols(aswm->display, e->window, &protocols, &count);
 		if(count > 0)
-			printf("\t\t");
+			aswm_notice("\t\t");
 		for(auto i = 0; i < count; i++) {
 			char* name = XGetAtomName(aswm->display, protocols[i]);
-			printf("%s ", name);
+			aswm_notice("%s ", name);
 			XFree(name);
 		}
 		if(count > 0)
-			printf("\n");
+			aswm_notice("");
 		XFree(protocols);
 
 	} else {
-		printf("\t-> Unhandled\n");
+		aswm_notice("\t-> Unhandled");
 	}
 	XFree(property_name);
 }
diff --git a/src/aswm/event_handlers/reparent.c b/src/aswm/event_handlers/reparent.c
index e3b5675..8c0c941 100644
--- a/src/aswm/event_handlers/reparent.c
+++ b/src/aswm/event_handlers/reparent.c
@@ -1,6 +1,6 @@
 #include "reparent.h"
-#include <stdio.h>
+#include "aswm/log/log.h"
 
 void OnReparentNotify(const XReparentEvent* e) {
-	printf("XReparentEvent from %lu: %lu to %lu\n", e->event, e->window, e->parent);
+	aswm_notice("XReparentEvent from %lu: %lu to %lu", e->event, e->window, e->parent);
 }
diff --git a/src/aswm/event_handlers/unmap.c b/src/aswm/event_handlers/unmap.c
index c70bad2..5d06f57 100644
--- a/src/aswm/event_handlers/unmap.c
+++ b/src/aswm/event_handlers/unmap.c
@@ -4,11 +4,11 @@
 #include <X11/Xutil.h>
 
 void OnUnmapNotify(Aswm* aswm, const XUnmapEvent* e) {
-	printf("XUnmapWindow %lu tiled in %lu\n", e->window, e->event);
+	aswm_notice("XUnmapWindow %lu tiled in %lu", e->window, e->event);
 	XWMHints* hints = XGetWMHints(aswm->display, e->window);
 	if(hints != NULL) {
-		printf("\tWM_HINTS\n");
-		printf("\t\tinitial_state: %i\n", hints->initial_state);
+		aswm_notice("\tWM_HINTS");
+		aswm_notice("\t\tinitial_state: %i", hints->initial_state);
 	}
 	// Since SubstructureNotify is selected on each frame, e->event corresponds
 	// to the parent of the unmapped window (e->window)
@@ -17,13 +17,13 @@ void OnUnmapNotify(Aswm* aswm, const XUnmapEvent* e) {
 	// windows are children of aswm->root_window.
 	if(e->event != XDefaultRootWindow(e->display)) {
 		if(e->event == aswm->current_desktop.tile_root) {
-			printf("aswm untile\n");
+			aswm_notice("aswm untile");
 			aswm_untile_window(e->display, e->event, e->window);
 		} else if(e->event == aswm->current_desktop.stack_root) {
-			printf("aswm unstack\n");
+			aswm_notice("aswm unstack");
 			aswm_unstack_window(e->display, e->event);
 		}
-		printf("Unmap tree:\n");
-		log_tree(aswm, DefaultRootWindow(aswm->display), 1);
+		aswm_info("Unmap tree:");
+		aswm_log_tree(aswm_info, aswm, DefaultRootWindow(aswm->display), 1);
 	}
 }
diff --git a/src/aswm/log/aswm_log.conf b/src/aswm/log/aswm_log.conf
new file mode 100644
index 0000000..f13badf
--- /dev/null
+++ b/src/aswm/log/aswm_log.conf
@@ -0,0 +1,7 @@
+[formats]
+
+simple = "[%c %p] %d(%m-%d %T) %-5V %f:%L %m%n"
+
+[rules]
+
+aswm.DEBUG >stdout; simple 
diff --git a/src/aswm/log/log.c b/src/aswm/log/log.c
index 0cdebac..fa0d8f0 100644
--- a/src/aswm/log/log.c
+++ b/src/aswm/log/log.c
@@ -1,6 +1,14 @@
 #include "log.h"
 #include <stdio.h>
 
+zlog_category_t* aswm_cat;
+
+_ASWM_LOG_TREE_DEF(aswm_info)
+_ASWM_LOG_TREE_DEF(aswm_warn)
+_ASWM_LOG_TREE_DEF(aswm_debug)
+_ASWM_LOG_TREE_DEF(aswm_notice)
+_ASWM_LOG_TREE_DEF(aswm_fatal)
+
 void log_tree(Aswm* aswm, Window window, int indent) {
 	XWindowAttributes window_attributes;
 	XGetWindowAttributes(aswm->display, window, &window_attributes);
@@ -29,3 +37,22 @@ void log_tree(Aswm* aswm, Window window, int indent) {
 		log_tree(aswm, children[i], indent+1);
 	XFree(children);
 }
+
+void set_up_logger(const char* zlog_conf) {
+	int rc;
+
+	rc = zlog_init(zlog_conf);
+	if (rc) {
+		printf("Init zlog from %s failed\n", zlog_conf);
+	}
+
+	aswm_cat = zlog_get_category("aswm");
+	if (!aswm_cat) {
+		printf("Get zlog aswm category failed\n");
+	}
+}
+
+void tear_down_logger(void) {
+	zlog_fini();
+}
+
diff --git a/src/aswm/log/log.h b/src/aswm/log/log.h
index 1253e34..06ef572 100644
--- a/src/aswm/log/log.h
+++ b/src/aswm/log/log.h
@@ -3,7 +3,64 @@
 
 #include <X11/Xlib.h>
 #include "aswm/aswm.h"
+#include "zlog.h"
+#include <string.h>
+
+extern zlog_category_t* aswm_cat;
+
+#define aswm_fatal(format, ...) zlog_fatal(aswm_cat, format __VA_OPT__(,) __VA_ARGS__)
+#define aswm_error(format, ...) zlog_error(aswm_cat, format __VA_OPT__(,) __VA_ARGS__)
+#define aswm_warn(format, ...) zlog_warn(aswm_cat, format __VA_OPT__(,) __VA_ARGS__)
+#define aswm_notice(format, ...) zlog_notice(aswm_cat, format __VA_OPT__(,) __VA_ARGS__)
+#define aswm_info(format, ...) zlog_info(aswm_cat, format __VA_OPT__(,) __VA_ARGS__)
+#define aswm_debug(format, ...) zlog_debug(aswm_cat, format __VA_OPT__(,) __VA_ARGS__)
+
+void set_up_logger(const char* zlog_conf);
+void tear_down_logger();
 
 void log_tree(Aswm* aswm, Window window, int indent);
+	
+#define _ASWM_LOG_TREE_DEC(logger)\
+	void _aswm_log_tree_##logger(Aswm* aswm, Window window, int indent);
+
+#define _ASWM_LOG_TREE_DEF(logger)\
+	void _aswm_log_tree_##logger(Aswm* aswm, Window window, int indent) {\
+		XWindowAttributes window_attributes;\
+		XGetWindowAttributes(aswm->display, window, &window_attributes);\
+		char format[80];\
+		strcpy(format, "");\
+		for(int i = 0; i < indent; i++)\
+			strcat(format, "  ");\
+		strcat(format, "%lu ");\
+		if(window == XDefaultRootWindow(aswm->display)) {\
+			strcat(format,"(X root) ");\
+		} else if (window == aswm->root_window) {\
+			strcat(format,"(ASWM root) ");\
+		} else if (window == aswm->current_desktop.root_window) {\
+			strcat(format,"(current workspace) ");\
+		} else if (window == aswm->current_desktop.tile_root) {\
+			strcat(format,"(tile root) ");\
+		} else if (window == aswm->current_desktop.stack_root) {\
+			strcat(format,"(stack root) ");\
+		}\
+		strcat(format, "at (%i, %i): %ix%i");\
+		logger(format, window, window_attributes.x, window_attributes.y, window_attributes.width, window_attributes.height);\
+		Window root_window;\
+		Window parent_tile;\
+		Window* children;\
+		unsigned int children_count;\
+		XQueryTree(aswm->display, window, &root_window, &parent_tile, &children, &children_count);\
+		for(auto i = 0; i < children_count; i++)\
+			_aswm_log_tree_##logger(aswm, children[i], indent+1);\
+		XFree(children);\
+	}
+
+_ASWM_LOG_TREE_DEC(aswm_info)
+_ASWM_LOG_TREE_DEC(aswm_warn)
+_ASWM_LOG_TREE_DEC(aswm_debug)
+_ASWM_LOG_TREE_DEC(aswm_notice)
+_ASWM_LOG_TREE_DEC(aswm_fatal)
+
+#define aswm_log_tree(logger, aswm, window, indent) _aswm_log_tree_##logger(aswm, window, indent)
 
 #endif
diff --git a/src/aswm/main.c b/src/aswm/main.c
index 6535ada..5ffc2d6 100644
--- a/src/aswm/main.c
+++ b/src/aswm/main.c
@@ -1,7 +1,34 @@
 #include "aswm.h"
+#include "argparse.h"
 
-int main(int argc, char** argv) {
-	aswm_open();
+#ifndef ASWM_LOG_CONF
+#define ASWM_LOG_CONF NULL
+#endif
+
+static const char *const usages[] = {
+    "aswm [options]",
+    NULL,
+};
+
+int main(int argc, const char** argv) {
+    const char *zlog_conf = NULL;
+    struct argparse_option options[] = {
+        OPT_HELP(),
+        OPT_GROUP("Config options"),
+        OPT_STRING('l', "log", &zlog_conf, "path to zlog config file", NULL, 0, 0),
+        OPT_END(),
+    };
+
+    struct argparse argparse;
+    argparse_init(&argparse, options, usages, 0);
+    argparse_describe(&argparse, "\nLaunches ASWM", "\nASWM is an Arcade Station Window Manager");
+    argc = argparse_parse(&argparse, argc, argv);
+
+	if (zlog_conf == NULL) {
+		zlog_conf = ASWM_LOG_CONF;
+	}
+
+	aswm_open(zlog_conf);
 	aswm_event_loop();
 	aswm_close();
 }
diff --git a/src/aswm/mapper/mapper.c b/src/aswm/mapper/mapper.c
index b6722a6..49e69ed 100644
--- a/src/aswm/mapper/mapper.c
+++ b/src/aswm/mapper/mapper.c
@@ -68,10 +68,9 @@ void resize_children_to_parent(Display* display, Window parent) {
 			display, parent,
 			&_root_window, &_grand_parent,
 			&children, &children_count);
-	printf("  Resize children of %lu:\n", parent);
+	aswm_debug("  Resize children of %lu:\n", parent);
 	for(auto i = 0; i < children_count; i++)
-		printf("%lu ", children[i]);
-	printf("\n");
+		aswm_debug("\t%lu", children[i]);
 
 	// Resize new children of the parent tile
 	XWindowAttributes parent_attributes;
@@ -113,10 +112,9 @@ void aswm_untile_window(Display* display, Window parent, Window window) {
 			display, parent,
 			&_root_window, &_grand_parent,
 			&children, &children_count);
-	printf("  Current children of %lu:\n", parent);
+	aswm_debug("  Current children of %lu:", parent);
 	for(auto i = 0; i < children_count; i++)
-		printf("%lu ", children[i]);
-	printf("\n");
+		aswm_debug("\t%lu", children[i]);
 	for(auto i = 0; i < children_count; i++) {
 		if(children[i] == window)
 			// If the unmap request does not come from a destroy window, we
@@ -212,10 +210,10 @@ void aswm_unstack_window(Display* display, Window stack) {
 	XFree(children);
 
 	if(visible_child) {
-		printf("Resize stack %lu\n", stack);
+		aswm_debug("Resize stack %lu\n", stack);
 		resize_stack(display, stack);
 	} else {
-		printf("Nothing in stack, unmap %lu\n", stack);
+		aswm_debug("Nothing in stack, unmap %lu\n", stack);
 		XWindowAttributes parent_size;
 		XGetWindowAttributes(display, parent, &parent_size);
 
@@ -235,7 +233,7 @@ bool is_in_stack(Display* display, Window stack_root, Window window) {
 }
 
 void aswm_handle_normal_hints(Display* display, Window stack_root, Window window, XSizeHints* size, long supplied) {
-	printf("Handle normal hints for %lu\n", window);
+	aswm_info("Handle normal hints for %lu", window);
 	XWindowAttributes win_attributes;
 	XGetWindowAttributes(display, window, &win_attributes);
 
diff --git a/test/aswm/test_aswm.c b/test/aswm/test_aswm.c
index bd4bd24..db3c2c7 100644
--- a/test/aswm/test_aswm.c
+++ b/test/aswm/test_aswm.c
@@ -138,8 +138,10 @@ void create_multiple_resizeable_top_level_window(void) {
 // not needed when using generate_test_runner.rb
 int main(void) {
     UNITY_BEGIN();
+	set_up_test_logger();
 	RUN_TEST(run_aswm);
-    RUN_TEST(create_single_resizeable_top_level_window);
+	RUN_TEST(create_single_resizeable_top_level_window);
 	RUN_TEST(create_multiple_resizeable_top_level_window);
+	tear_down_test_logger();
     return UNITY_END();
 }
diff --git a/test/aswm_log.conf b/test/aswm_log.conf
new file mode 100644
index 0000000..387235e
--- /dev/null
+++ b/test/aswm_log.conf
@@ -0,0 +1,7 @@
+[formats]
+
+simple = "[%c %p] %d(%m-%d %T) %-5V %-8f:%-3L %m%n"
+
+[rules]
+
+aswm.NOTICE >stdout; simple 
diff --git a/test/log.conf b/test/log.conf
new file mode 100644
index 0000000..24ae044
--- /dev/null
+++ b/test/log.conf
@@ -0,0 +1,8 @@
+[formats]
+
+simple = "[%c %p] %d(%m-%d %T) %-5V %f:%L %m%n"
+
+[rules]
+
+aswm.INFO >stdout; simple 
+test.DEBUG >stdout; simple 
diff --git a/test/test_set_up.c b/test/test_set_up.c
index e6aa1fc..8a7a280 100644
--- a/test/test_set_up.c
+++ b/test/test_set_up.c
@@ -9,6 +9,7 @@ char display_name[5];
 int aswm_pid;
 Display* test_display;
 Window test_root;
+zlog_category_t *test_log;
 
 // Local variables
 unsigned int display_count = 100;
@@ -25,6 +26,24 @@ void run_xephyr() {
 	execvp(args[0], args);
 }
 
+void set_up_test_logger(void) {
+	int rc;
+
+	rc = zlog_init(ASWM_TEST_DIR "/log.conf");
+	if (rc) {
+		printf("Init test zlog failed\n");
+	}
+
+	test_log = zlog_get_category("test_log");
+	if (!test_log) {
+		printf("Get zlog test_log category failed\n");
+	}
+}
+
+void tear_down_test_logger(void) {
+	zlog_fini();
+}
+
 void setUp(void) {
 	tmpnam(display_fd); // Creates a temporary file name
 	sprintf(display_name, ":%u", display_count); // Loads initial display count
@@ -34,7 +53,7 @@ void setUp(void) {
 	if(xephyr_pid == 0) {
 		run_xephyr();
 	} else {
-		printf("Trying to run Xephyr instance on :%u...\n", display_count);
+		zlog_info(test_log, "Trying to run Xephyr instance on :%u...", display_count);
 	}
 
 	// The following loop waits for one of those two things:
@@ -60,7 +79,7 @@ void setUp(void) {
 			if(xephyr_pid == 0) {
 				run_xephyr();
 			} else {
-				printf("Trying to run Xephyr instance on :%u...\n", display_count);
+				zlog_info(test_log, "Trying to run Xephyr instance on :%u...", display_count);
 			}
 		}
 	}
@@ -68,8 +87,8 @@ void setUp(void) {
 
 	aswm_pid = fork();
 	if(aswm_pid == 0) {
-		printf("Running aswm instance on %s...\n", display_name);
-		char* args[] = {"./aswm", NULL};
+		zlog_info(test_log, "Running aswm instance on %s...", display_name);
+		char* args[] = {"./aswm", "--log", ASWM_TEST_DIR "/aswm_log.conf", NULL};
 		char display_env[256];
 		sprintf(display_env, "DISPLAY=%s", display_name);
 		char* envp[] = {display_env, NULL};
diff --git a/test/test_set_up.h b/test/test_set_up.h
index 1d61493..53a95ca 100644
--- a/test/test_set_up.h
+++ b/test/test_set_up.h
@@ -2,13 +2,22 @@
 #define ASWM_TEST_SET_UP
 
 #include "unity.h"
+#include "zlog.h"
 #include "X11/Xlib.h"
 
+#ifndef ASWM_TEST_DIR
+#define ASWM_TEST_DIR "."
+#endif
+
 // Extern variables accessible from any test.
 // Defined in test_set_up.c
 extern char display_name[5];
 extern int aswm_pid;
 extern Display* test_display;
 extern Window test_root;
+extern zlog_category_t *test_log;
+
+void set_up_test_logger();
+void tear_down_test_logger();
 
 #endif