#include <stdlib.h>
#include <stdbool.h>
#include <strings.h>
#include "container.h"
#include "workspace.h"
#include "layout.h"
#include "log.h"


static swayc_t *new_swayc(enum swayc_types type) {
	swayc_t *c = calloc(1, sizeof(swayc_t));
	c->handle = -1;
	c->layout = L_NONE;
	c->type = type;
	c->weight  = 1;
	if (type != C_VIEW) {
		c->children = create_list();
	}
	return c;
}

static void free_swayc(swayc_t *c) {
	//TODO does not properly handle containers with children,
	//TODO but functions that call this usually check for that
	if (c->children) {
		list_free(c->children);
	}
	if (c->parent) {
		if (c->parent->focused == c) {
			c->parent->focused = NULL;
		}
		remove_child(c->parent, c);
	}
	if (c->name) {
		free(c->name);
	}
	free(c);
}

/* New containers */
static void add_output_widths(swayc_t *container, void *_width) {
	int *width = _width;
	if (container->type == C_OUTPUT) {
		*width += container->width;
	}
}

swayc_t *new_output(wlc_handle handle) {
	sway_log(L_DEBUG, "Added output %d", handle);
	const struct wlc_size* size = wlc_output_get_resolution(handle);

	swayc_t *output = new_swayc(C_OUTPUT);
	output->width = size->w;
	output->height = size->h;
	output->handle = handle;

	add_child(&root_container, output);

	//TODO something with this
	int total_width = 0;
	container_map(&root_container, add_output_widths, &total_width);

	//Create workspace
	char *ws_name = workspace_next_name();
	new_workspace(output, ws_name);
	free(ws_name);
	
	return output;
}

swayc_t *new_workspace(swayc_t * output, const char *name) {
	sway_log(L_DEBUG, "Added workspace %s for output %d", name, output->handle);
	swayc_t *workspace = new_swayc(C_WORKSPACE);

	workspace->layout = L_HORIZ; // TODO:default layout
	workspace->width = output->width;
	workspace->height = output->height;
	workspace->name = strdup(name);
	workspace->visible = true;

	add_child(output, workspace);
	return workspace;
}

swayc_t *new_container(swayc_t *child, enum swayc_layouts layout) {
	swayc_t *cont = new_swayc(C_CONTAINER);

	sway_log(L_DEBUG, "creating container %p around %p", cont, child);

	cont->layout = layout;
	cont->width = child->width;
	cont->height = child->height;
	cont->x	= child->x;
	cont->y = child->y;
	cont->visible = child->visible;

	/* Container inherits all of workspaces children, layout and whatnot */
	if (child->type == C_WORKSPACE) {
		swayc_t *workspace = child;
		//reorder focus
		cont->focused = workspace->focused;
		workspace->focused = cont;
		//Swap children
		list_t  *tmp_list  = workspace->children;
		workspace->children = cont->children;
		cont->children = tmp_list;
		//add container to workspace chidren
		add_child(workspace, cont);
		//give them proper layouts
		cont->layout = workspace->layout;
		workspace->layout = layout;
	}
	//Or is built around container
	else {
		swayc_t *parent = replace_child(child, cont);
		if (parent) {
			add_child(cont, child);
		}
	}
	return cont;
}

swayc_t *new_view(swayc_t *sibling, wlc_handle handle) {
	const uint32_t type = wlc_view_get_type(handle);
	const char   *title = wlc_view_get_title(handle);
	/* Skip if unmanaged window */
	if ((type & WLC_BIT_OVERRIDE_REDIRECT) || (type & WLC_BIT_UNMANAGED) ||
		(type & WLC_BIT_POPUP) || (type & WLC_BIT_MODAL) || (type & WLC_BIT_SPLASH)) {
		sway_log(L_DEBUG, "Leaving view %d:%s alone (unmanaged)", handle, title);
		return NULL;
	}

	swayc_t *view = new_swayc(C_VIEW);
	sway_log(L_DEBUG, "Adding new view %d:%s:%d to container %p %d",
		handle, title, type, sibling, sibling?sibling->type:0);
	//Setup values
	view->handle = handle;
	view->name = strdup(title);
	view->visible = true;

	//Case of focused workspace, just create as child of it
	if (sibling->type == C_WORKSPACE) {
		add_child(sibling, view);
	}
	//Regular case, create as sibling of current container
	else {
		add_sibling(sibling, view);
	}
	return view;
}


swayc_t *destroy_output(swayc_t *output) {
	if (output->children->length == 0) {
		//TODO move workspaces to other outputs
	}
	sway_log(L_DEBUG, "OUTPUT: Destroying output '%d'", output->handle);
	free_swayc(output);
	return &root_container;
}

swayc_t *destroy_workspace(swayc_t *workspace) {
	//NOTE: This is called from elsewhere without checking children length
	//TODO move containers to other workspaces?
	//for now just dont delete
	if (workspace->children->length == 0) {
		sway_log(L_DEBUG, "Workspace: Destroying workspace '%s'", workspace->name);
		swayc_t *parent = workspace->parent;
		free_swayc(workspace);
		return parent;
	}
	return NULL;
}

swayc_t *destroy_container(swayc_t *container) {
	while (container->children->length == 0 && container->type == C_CONTAINER) {
		sway_log(L_DEBUG, "Container: Destroying container '%p'", container);
		swayc_t *parent = container->parent;
		free_swayc(container);

		container = parent;
	}
	return container;
}

swayc_t *destroy_view(swayc_t *view) {
	if (view == NULL) {
		sway_log(L_DEBUG, "Warning: NULL passed into destroy_view");
		return NULL;
	}
	sway_log(L_DEBUG, "Destroying view '%p'", view);
	swayc_t *parent = view->parent;
	free_swayc(view);

	//Destroy empty containers
	if (parent->type == C_CONTAINER) {
		return destroy_container(parent);
	}
	return parent;
}


swayc_t *find_container(swayc_t *container, bool (*test)(swayc_t *view, void *data), void *data) {
	if (!container->children) {
		return NULL;
	}
	int i;
	for (i = 0; i < container->children->length; ++i) {
		swayc_t *child = container->children->items[i];
		if (test(child, data)) {
			return child;
		} else {
			swayc_t *_ = find_container(child, test, data);
			if (_) {
				return _;
			}
		}
	}
	return NULL;
}

void container_map(swayc_t *container, void (*f)(swayc_t *view, void *data), void *data) {
	if (!container->children || !container->children->length)  {
		return;
	}
	int i;
	for (i = 0; i < container->children->length; ++i) {
		swayc_t *child = container->children->items[i];
		f(child, data);
		container_map(child, f, data);
	}
}