#include "app.h"
#include "../tools/Scheduler.h"
#include "../interfaces/components/TabbedComponent.h"
#include "../parsers/markup/ntrml/NTRMLParser.h"
#include "../parsers/markup/html/HTMLParser.h"

#include "../interfaces/components/DocumentComponent.h"
//#include "interfaces/components/ComponentBuilder.h"
#include "../interfaces/components/InputComponent.h"
#include "../interfaces/components/ImageComponent.h"
#include "../interfaces/components/TabbedComponent.h"
#include "../interfaces/components/ButtonComponent.h"

#include <fstream>
#ifndef _WIN32
#include <glob.h>
#else
#include "../win32-glob.h"
#endif

// why can't I const this?
std::unique_ptr<Scheduler> scheduler = std::make_unique<Scheduler>();

void doOnClick(std::string type, Component *component, Window *win) {
    if (type=="back") {
        component->onClick=[win]() {
            std::cout << "Browser::doOnClick.navBackButton->onClick - Back" << std::endl;
            TabbedComponent *pTabComponent = dynamic_cast<TabbedComponent*>(win->tabComponent.get());
            if (pTabComponent) {
                if (pTabComponent->selectedTabId) {
                    pTabComponent->selectedTab->get()->history->print();
                    pTabComponent->selectedTab->get()->history->back();
                } else {
                    std::cout << "Browser::doOnClick.navBackButton->onClick - no tab selected" << std::endl;
                }
            } else {
                std::cout << "Browser::doOnClick.navBackButton->onClick - no tabbed component" << std::endl;
            }
        };
    } else if (type=="forward") {
        component->onClick=[win]() {
            //std::cout << "Forward" << std::endl;
            TabbedComponent *pTabComponent = dynamic_cast<TabbedComponent*>(win->tabComponent.get());
            if (pTabComponent) {
                if (pTabComponent->selectedTabId) {
                    pTabComponent->selectedTab->get()->history->forward();
                }
            }
        };
    } else if (type=="refresh") {
        component->onClick=[win]() {
            std::shared_ptr<DocumentComponent> docComponent = win->getActiveDocumentComponent();
            if (docComponent) {
                std::cout << "Refreshing " << docComponent->currentURL << std::endl;
                // now tell it to navigate somewhere
                docComponent->navTo(docComponent->currentURL.toString());
            }
        };
    } else if (type=="go") {
        component->onClick=[win]() {
            // get address bar value and nav away
            std::string value;
            InputComponent *p_addressComponent = dynamic_cast<InputComponent*>(win->addressComponent.get());
            if (!p_addressComponent) {
                std::cout << "Browser:zdoOnClick.navAddressBar->onClick - can't find address bar in windows " << std::endl;
                return;
            }
            //std::cout << "Browser:zdoOnClick.navAddressBar->onClick - got " << value << std::endl;

            TabbedComponent *p_tabComponent = dynamic_cast<TabbedComponent*>(win->tabComponent.get());
            if (p_tabComponent) {
                if (!p_tabComponent->tabs.size()) {
                    p_tabComponent->addTab("Loading...");
                    p_tabComponent->selectTab(p_tabComponent->tabs.back());

                    win->renderDirty = true;
                    win->render(); // display loading tab before IO
                }
            }

            std::shared_ptr<DocumentComponent> docComponent = win->getActiveDocumentComponent();
            if (docComponent) {
                //std::cout << "Browser:zdoOnClick.navAddressBar->onClick - Found an active document component" << std::endl;
                // now tell it to navigate somewhere
                docComponent->navTo(value);
            } else {
                std::cout << "Browser:zdoOnClick.navAddressBar->onClick - No active document component" << std::endl;
            }
        };
    } else if (type=="nextTab") {
        component->onClick=[win]() {
            // get tab value and nav away
        };
    } else if (type=="prevTab") {
        component->onClick=[win]() {
            // get tab value and nav away
        };
    }
}

std::shared_ptr<Node> App::loadTheme(std::string filename) {
    std::string ntrml, line;
    std::ifstream myfile(filename);
    if (myfile.is_open()) {
        while(getline(myfile, line)) {
            ntrml += line;
        }
        myfile.close();
    } else {
        std::cout << "Couldnt read " << filename << std::endl;
    }
    NTRMLParser uiParser;
    //std::cout << "Browser read [" << ntrml << "]" << std::endl;
    return uiParser.parse(ntrml);
}

void App::destroyTheme() {
    for(auto win: this->windows) {
        if (win->tabComponent) {
            TabbedComponent *tabbedComponent = dynamic_cast<TabbedComponent *>(win->tabComponent.get());
            for(auto tab: tabbedComponent->tabs) {
                tabbedComponent->removeTab(tab->id);
            }
        }
        win->addressComponent = nullptr;
        win->tabComponent = nullptr;
        for(auto layer: win->ui->layers) {
            layer.reset();
        }
        win->ui->layers.clear();
    }
}

void App::rebuildTheme() {
    for(auto win: this->windows) {

        // convert uiRootNode into a component list
        std::shared_ptr<Component> rootComponent = std::make_shared<Component>();
        rootComponent->name = "rootComponent of browser";
        // we build one global tree that each layer has a child node in
        this->layers.clear(); // nuke any layers we have
        this->createComponentTree(this->uiRootNode, rootComponent, win);
        //Component::printComponentTree(rootComponent, 0);

        // these probably should be fatal
        if (!win->addressComponent) {
            std::cout << "ERROR: no addressComponent" << std::endl;
        }
        if (!win->tabComponent) {
            std::cout << "ERROR: no tabComponent" << std::endl;
        }

        // we want each window to has it's own component tree, so each address bar can have different values
        size_t layerCount = 0;
        for(auto layer: this->layers) {
            // set proper vertices
            layer->resize(win->windowWidth, win->windowHeight);
            // transfer layer
            win->ui->layers.push_back(layer);
            // debug
            /*
            std::cout << "layer: " << layerCount << std::endl;
            Component::printComponentTree(layer, 0);
             */
            layerCount++;
            layer.reset(); // deallocate our local layers
        }
        rootComponent.reset();

        //newWindow->rootComponent = rootComponent;
        //newWindow->ui->rootComponent = rootComponent;
        win->renderDirty = true;

    }
}

void App::transferTheme(std::string filename) {
    // assuming we don't need the NodeTree to get our values
    this->uiRootNode.reset();
    this->uiRootNode = this->loadTheme(filename);

    for(auto win: this->windows) {
        glfwMakeContextCurrent(win->window);

        TabbedComponent *oldTabbedComponent = nullptr;
        if (win->tabComponent) {
            oldTabbedComponent = dynamic_cast<TabbedComponent *>(win->tabComponent.get());
        }
        win->tabComponent = nullptr; // release to release
        win->addressComponent = nullptr; // I think this is ok to release now

        // convert uiRootNode into a component list
        std::shared_ptr<Component> rootComponent = std::make_shared<Component>();
        rootComponent->name = "rootComponent of browser";
        this->layers.clear(); // nuke any layers we had (doesn't nuke window layers)
        // we build one global tree that each layer has a child node in
        this->createComponentTree(this->uiRootNode, rootComponent, win);
        //Component::printComponentTree(rootComponent, 0);

        // these probably should be fatal
        if (!win->addressComponent) {
            std::cout << "ERROR: no addressComponent" << std::endl;
        }
        if (!win->tabComponent) {
            std::cout << "ERROR: no tabComponent" << std::endl;
        }

        // ok now we need to transfer the tabs over
        if (oldTabbedComponent) {
            // should have been set in createComponentTree
            TabbedComponent *newTabbedComponent = dynamic_cast<TabbedComponent *>(win->tabComponent.get());
            if (newTabbedComponent) {
                size_t oldSelectedTabId = oldTabbedComponent->selectedTabId;
                std::shared_ptr<Tab> newSelectedTab = nullptr;
                std::cout << "going to copy " << oldTabbedComponent->tabs.size() << " tab(s) over to new theme" << std::endl;
                for(auto tab: oldTabbedComponent->tabs) {
                    DocumentComponent *oldDocComponent = dynamic_cast<DocumentComponent *>(tab->contents.get());
                    if (oldDocComponent) {
                        //std::cout << "Reading DOM" << std::endl;
                        //printNode(oldDocComponent->domRootNode, 0);

                        std::shared_ptr<Tab> nTab = newTabbedComponent->addTab(tab->titleBox->text);
                        newTabbedComponent->selectTab(nTab);
                        // maybe faster if we can skip the component tree rebuild
                        newTabbedComponent->loadDomIntoTab(oldDocComponent->domRootNode, tab->titleBox->text);
                        //newTabbedComponent->documentComponent.get()
                        DocumentComponent *newDocComponent = dynamic_cast<DocumentComponent *>(newTabbedComponent->tabs.back()->contents.get());
                        if (newDocComponent) {
                            // really slow and we don't need to do this for all tabs
                            // not sure why this is required...
                            //newDocComponent->setDOM(oldDocComponent->domRootNode);
                            //std::cout << "Checking DOM" << std::endl;
                            //printNode(newTabbedComponent->documentComponent->, 0);
                            newDocComponent->render(); // flush out components
                            //newDocComponent->domDirty = true; // is most accurate
                        } else {
                            std::cout << "new tab had no doc" << std::endl;
                        }
                        if (tab->id == oldSelectedTabId) {
                            // translate old selected id into new id
                            newSelectedTab = nTab;
                        }
                    } else {
                        std::cout << "old tab had no doc" << std::endl;
                    }
                    // this breaks everything
                    //oldTabbedComponent->removeTab(tab->id);
                }
                if (newSelectedTab) {
                    newTabbedComponent->selectTab(newSelectedTab);
                    /*
                    DocumentComponent *newDocComponent = dynamic_cast<DocumentComponent *>(newTabbedComponent->documentComponent.get());
                    if (newDocComponent) {
                        // FIXME: can only in render active window/ogl context
                        newDocComponent->render(); // flush out components
                    } else {
                        std::cout << "new selected tab had no doc" << std::endl;
                    }
                    */
                } else {
                    std::cout << "no new selected tab" << std::endl;
                }
                /*
                std::cout << "new tabbed component has " << newTabbedComponent->tabs.size() << " tab(s) over from old theme" << std::endl;
                for(auto tab: newTabbedComponent->tabs) {
                    DocumentComponent *newDocComponent = dynamic_cast<DocumentComponent *>(tab->contents.get());
                    std::cout << "checking tab DOM" << std::endl;
                    printNode(newDocComponent->domRootNode, 0);
                }
                if (newTabbedComponent->documentComponent) {
                    DocumentComponent *newDocComponent = dynamic_cast<DocumentComponent *>(newTabbedComponent->documentComponent.get());
                    std::cout << "checking selected DOM" << std::endl;
                    printNode(newDocComponent->domRootNode, 0);
                }
                */
            } else {
                std::cout << "new theme didnt have tab component" << std::endl;
            }
        } else {
            std::cout << "old theme didnt have tab component" << std::endl;
        }

        // now we're officially done with old layer, nuked them
        for(auto layer: win->ui->layers) {
            layer.reset();
        }
        win->ui->layers.clear();

        // we want each window to has it's own component tree, so each address bar can have different values
        size_t layerCount = 0;
        for(auto layer: this->layers) {
            // set proper vertices
            layer->resize(win->windowWidth, win->windowHeight);
            // transfer layer
            win->ui->layers.push_back(layer);
            // debug
            /*
             std::cout << "layer: " << layerCount << std::endl;
             Component::printComponentTree(layer, 0);
             */
            layerCount++;
            layer.reset(); // deallocate our local layers
        }
        rootComponent.reset();

        //newWindow->rootComponent = rootComponent;
        //newWindow->ui->rootComponent = rootComponent;
        win->renderDirty = true;
    }
}

void App::NextTheme() {
    glob_t glob_result;
    static unsigned int t = 0;
#ifndef _WIN32
    glob("*.ntrml", GLOB_TILDE, nullptr, &glob_result);
#else
    glob("*.ntrml", GLOB_NOCHECK, nullptr, &glob_result);
#endif
    t++;
    if (t == glob_result.gl_pathc) t = 0;
    /*
    for(unsigned int i = 0; i < glob_result.gl_pathc; ++i){
        if (t == i) std::cout << "*";
        std::cout << glob_result.gl_pathv[i] << std::endl;
    }
    */
    // this works decently, but only destroys first window
    /*
    this->destroyTheme();
    //deleteNode(this->uiRootNode);
    this->uiRootNode.reset();
    this->uiRootNode = this->loadTheme(std::string(glob_result.gl_pathv[t]));
    this->rebuildTheme();
     */
    this->transferTheme(glob_result.gl_pathv[t]);
    // start with removing existing theme
    // and replacing with new version of existing theme
}

// Previously defined components with functionality
// 1+ image (no functionality)
// 1+ tabbed document
// 1+ back/fwd/reload/stop components
// 1+ address bar
void App::createComponentTree(const std::shared_ptr<Node> node, std::shared_ptr<Component> &parentComponent, std::shared_ptr<Window> win) {
    // FIXME: remove these 2 vars
    int winWidth = win->windowWidth;
    int winHeight = win->windowHeight;
    std::string tag;
    if (node == nullptr) {
        std::cout << "ComponentBuilder::build - node is null" << std::endl;
        return;
    }
    TagNode *tagNode = nullptr;
    if (node->nodeType == NodeType::TAG) {
        tagNode = dynamic_cast<TagNode*>(node.get());
        if (tagNode) {
            tag = tagNode->tag;
        }
    } else if (node->nodeType == NodeType::TEXT) {
        // just ignore text blocks
        return;
        tagNode = dynamic_cast<TagNode*>(node->parent.get());
        if (tagNode) {
            tag = tagNode->tag;
        }
    }
    std::shared_ptr<Component> component = nullptr;
    if (!tagNode) {
        // usually the root node...
        //std::cout << "!tagnode" << std::endl;
        component = std::make_shared<Component>();
        for (std::shared_ptr<Node> child : node->children) {
            createComponentTree(child, component, win);
        }
        return;
    }

    //std::cout << "Looking at tag[" << tag << "]" << std::endl;
    if (tag == "layer") {
        // the layering only works for default layout due to the ordering we're doign in window.render
        component = std::make_shared<Component>();
        this->layers.push_back(component);
        //parentComponent = component;
        //std::swap(component, parentComponent);
        //std::cout << "there are now " << this->layers.size() << " layers" << std::endl;
    } else if (tag == "body") {
        if (tagNode->properties.find("bgcolor") != tagNode->properties.end()) {
            std::stringstream ss;
            ss << std::hex << tagNode->properties["bgcolor"];
            ss >> win->clearColor;
            //std::cout << "set clear color " << std::hex << win->clearColor << std::dec << std::endl;

            float r = (static_cast<float>((win->clearColor >> 24) & 0xFF)) / 255;
            float g = (static_cast<float>((win->clearColor >> 16) & 0xFF)) / 255;
            float b = (static_cast<float>((win->clearColor >>  8) & 0xFF)) / 255;
            float a = (static_cast<float>((win->clearColor >>  0) & 0xFF)) / 255;
            glClearColor(r, g, b, a);
        }
    } else if (tag == "img") {
        std::string src = "anime.pnm";
        if (tagNode->properties.find("src") != tagNode->properties.end()) {
            src = tagNode->properties["src"];
        }
        //std::shared_ptr<ImageComponent> img = std::make_unique<ImageComponent>(src, winWidth * imgSetup.left.pct * 0.01 + imgSetup.left.px, winHeight * imgSetup.top.pct * 0.01 + imgSetup.top.px, imgSetup.width.px, imgSetup.height.px, winWidth, winHeight);
        std::shared_ptr<ImageComponent> img = std::make_unique<ImageComponent>(src, 0, 0, 512, 512, winWidth, winHeight);
        img->boundToPage = false; // have to set this before setUpUI
        img->setUpUI(tagNode->properties, win.get());
        // set up interactivity
        if (tagNode->properties.find("onClick") != tagNode->properties.end()) {
            img->isPickable = true;
            //doOnClick(std::string type, Component &component, Window *win)
            doOnClick(tagNode->properties["onClick"], img.get(), win.get());
        }
        img->isPickable = false;
        img->name = "img";
        if (tagNode->properties.find("name") != tagNode->properties.end()) {
            img->name = tagNode->properties["name"];
        }
        component = img;
        //std::cout << "Added img component to ui" << std::endl;
    } else if (tag == "font") {
        // TextComponent(const std::string &rawText, const int rawX, const int rawY, const unsigned int size, const bool bolded, const unsigned int hexColor, const int passedWindowWidth, const int passedWindowHeight);
        std::string label = "NeTRunner";
        if (node->children.size()) {
            TextNode *textNode = dynamic_cast<TextNode*>(node->children.front().get());
            if (textNode) {
                label = textNode->text;
            }
        }
        std::shared_ptr<TextComponent> text = std::make_unique<TextComponent>(label, 0, 0, 12, false, 0x000000FF, winWidth, winHeight);
        text->boundToPage = false; // have to set this before setUpUI
        text->win = win;
        // this may not work for the text shader... yea doesn't seem to
        text->setUpUI(tagNode->properties, win.get());
        text->isPickable = false;
        //text->resize(win->windowWidth, win->windowHeight); // force a re-raster
        // set up interactivity
        if (tagNode->properties.find("onClick") != tagNode->properties.end()) {
            text->isPickable = true;
            //doOnClick(std::string type, Component &component, Window *win)
            doOnClick(tagNode->properties["onClick"], text.get(), win.get());
        }
        component = text;
    } else if (tag == "box") {
        unsigned int color = 0x888888FF;
        if (tagNode->properties.find("color") != tagNode->properties.end()) {
            std::stringstream ss;
            ss << std::hex << tagNode->properties["color"];
            ss >> color;
            //std::cout << "read color " << tagNode->properties["color"] << " as " << std::hex << color << std::dec << std::endl;
        }

        // winHeight minus because box coordinates? yes
        //std::cout << "placing box at " << cX << "," << cY << " " << cW << "x" << cH << " color: " << std::hex << color << std::dec << std::endl;
        //std::shared_ptr<BoxComponent> box = std::make_unique<BoxComponent>(cX, winHeight - cH - cY, cW, cH, color, winWidth, winHeight);
        std::shared_ptr<BoxComponent> box = nullptr;
        if (node->children.size()) {
            box = std::make_unique<ButtonComponent>(0, 0, 1, 1, color, winWidth, winHeight);
        } else {
            box = std::make_unique<BoxComponent>(0, 0, 1, 1, color, winWidth, winHeight);
        }
        box->boundToPage = false; // have to set this before setUpUI
        box->setUpUI(tagNode->properties, win.get());
        box->isPickable = false;
        box->name = "box";
        if (tagNode->properties.find("name") != tagNode->properties.end()) {
            box->name = tagNode->properties["name"];
        }
        // set up interactivity
        if (tagNode->properties.find("hover") != tagNode->properties.end()) {
            box->isPickable = true;
            unsigned int hoverColor = 0;
            std::stringstream ss;
            ss << std::hex << tagNode->properties["hover"];
            ss >> hoverColor;
            //std::cout << "setHover Color " << std::hex << hoverColor << std::dec << std::endl;
            box->onMouseover = [box, win, hoverColor]() {
                //std::cout << "box->onMouseover" << std::endl;
                box->changeColor(hoverColor);
                win->renderDirty = true;
            };
            box->onMouseout = [box, win, color]() {
                //std::cout << "box->onMouseout" << std::endl;
                box->changeColor(color);
                win->renderDirty = true;
            };
        }
        if (tagNode->properties.find("onClick") != tagNode->properties.end()) {
            box->isPickable = true;
            //doOnClick(std::string type, Component &component, Window *win)
            doOnClick(tagNode->properties["onClick"], box.get(), win.get());
        }
        component = box;
        // if this button node has children, extract the text before discarding it
        if (node->children.size()) {
            TextNode *textNode = dynamic_cast<TextNode*>(node->children.front().get());
            if (textNode) {
                // so now cast back to a ButtonComponent and set it
                std::cout << "Box text: " << textNode->text << std::endl;
                /*
                ButtonComponent *buttonComponent = dynamic_cast<ButtonComponent*>(component.get());
                if (buttonComponent) {
                    buttonComponent->value = textNode->text;
                    buttonComponent->resizeToTextSize();
                    buttonComponent->updateText();
                }
                */
            }
        }
        // manual quick add before we bail
        component->setParent(parentComponent);
        parentComponent->children.push_back(component);
        // skip my children
        return;
    } else if (tag == "input") {
        //std::shared_ptr<InputComponent> navAddressBar = std::make_unique<InputComponent>(192.0f, winHeight - 48.0f, winWidth - 384.0f, 24.0f, winWidth, winHeight);
        std::shared_ptr<InputComponent> navAddressBar = std::make_unique<InputComponent>(0, 0, 384.0f, 24.0f, winWidth, winHeight);
        navAddressBar->boundToPage = false; // have to set this before setUpUI
        navAddressBar->setUpUI(tagNode->properties, win.get());
        navAddressBar->name = "navAddressBar";

        navAddressBar->onEnter=[win](std::string value) {
            std::cout << "navAddressBar::onEnter got " << value << std::endl;

            TabbedComponent *p_tabComponent = dynamic_cast<TabbedComponent*>(win->tabComponent.get());
            if (p_tabComponent) {
                if (!p_tabComponent->tabs.size()) {
                    p_tabComponent->addTab("Loading...");
                    p_tabComponent->selectTab(p_tabComponent->tabs.back());

                    win->renderDirty = true;
                    win->render(); // display loading tab before IO
                }
            }

            std::shared_ptr<DocumentComponent> docComponent = win->getActiveDocumentComponent();
            if (docComponent) {
                std::cout << "Found an active document component" << std::endl;
                // now tell it to navigate somewhere
                docComponent->navTo(value);
            } else {
                std::cout << "No active document component" << std::endl;
            }
        };

        navAddressBar->win = win;
        win->addressComponent = navAddressBar;
        component = navAddressBar;
    } else if (tag == "tabselector") {
        std::shared_ptr<TabbedComponent> tabbedComponent = std::make_shared<TabbedComponent>(0, 0, static_cast<float>(winWidth), static_cast<float>(winHeight - 64), winWidth, winHeight);
        tabbedComponent->win = win;
        win->tabComponent = tabbedComponent;
        tabbedComponent->boundToPage = false; // have to set this before setUpUI
        tabbedComponent->setUpUI(tagNode->properties, win.get());
        tabbedComponent->name = "tabbedComponent";
        /*
        tabbedComponent->y = -64;
        tabbedComponent->uiControl.x = { 0  ,   0 }; // 0
        tabbedComponent->uiControl.y = { 0  , -64 }; // -64px
        tabbedComponent->uiControl.w = { 100,   0 }; // 100%
        tabbedComponent->uiControl.h = { 100, -64 }; // 100% - 64px
        tabbedComponent->boundToPage = false;
        */
        component = tabbedComponent;
        // make the UI focus on it to relay keyboard events
        win->ui->relayKeyboardComponent = tabbedComponent;
    } else {
        std::cout << "Browser::createComponentTree - unknown tag[" << tag << "]" << std::endl;
    }
    if (!component) {
        component = std::make_shared<Component>();
    }
    // add it to our parent
    component->setParent(parentComponent);
    parentComponent->children.push_back(component);
    // , children count: " << parentComponent->children.size()

    // create children elements
    for (std::shared_ptr<Node> child : node->children) {
        createComponentTree(child, component, win);
    }
    component.reset();
}

void App::addJSDebuggerWindow() {
    windowCounter++;
    std::shared_ptr<Window> newWindow = std::make_shared<Window>();
    newWindow->id = windowCounter;
    newWindow->windowWidth = 1024;
    newWindow->windowHeight = 640;
    newWindow->init(); // load our UI into it
    std::shared_ptr<Component> p_rootComponent = std::make_shared<Component>();
    p_rootComponent->name = "rootComponent of jsconsole";

    std::shared_ptr<TextComponent> outputComp = std::make_shared<TextComponent>("NeTRunner JavaScript console", 0, 0, 12, false, 0x000000FF, newWindow->windowWidth, newWindow->windowHeight);
    outputComp->win = newWindow;
    newWindow->ui->layers.push_back(outputComp);
    outputComp.reset();

    /*
    std::shared_ptr<InputComponent> inputComp = std::make_shared<InputComponent>(0, 0, 1024, 12, newWindow->windowWidth, newWindow->windowHeight);
    inputComp->win = newWindow;
    newWindow->ui->layers.push_back(inputComp);
    inputComp.reset();
     */

    this->windows.push_back(newWindow);
    newWindow.reset();
}

void App::addWindow() {
    windowCounter++;
    std::shared_ptr<Window> newWindow = std::make_shared<Window>();
    newWindow->id = windowCounter;
    newWindow->windowWidth = 1024;
    newWindow->windowHeight = 640;
    newWindow->init(); // load our UI into it
    newWindow->openglWindow->app = this;

    // convert uiRootNode into a component list
    std::shared_ptr<Component> p_rootComponent = std::make_shared<Component>();
    p_rootComponent->name = "rootComponent of browser";
    // we build one global tree that each layer has a child node in

    this->createComponentTree(this->uiRootNode, p_rootComponent, newWindow);
    //Component::printComponentTree(p_rootComponent, 0);

    // these probably should be fatal
    if (!newWindow->addressComponent) {
        std::cout << "ERROR: no addressComponent" << std::endl;
    }
    if (!newWindow->tabComponent) {
        std::cout << "ERROR: no tabComponent" << std::endl;
    }

    // we want each window to has it's own component tree, so each address bar can have different values
    size_t layerCount = 0;
    for(auto layer: this->layers) {
        // set proper vertices
        layer->resize(newWindow->windowWidth, newWindow->windowHeight);
        // transfer layer
        newWindow->ui->layers.push_back(layer);
        // debug
        /*
        std::cout << "layer: " << layerCount << std::endl;
        Component::printComponentTree(layer, 0);
        */
        layerCount++;
        layer.reset(); // deallocate our local layers
    }
    this->layers.clear(); // nuke any layers we have
    p_rootComponent.reset();

    //newWindow->rootComponent = rootComponent;
    //newWindow->ui->rootComponent = rootComponent;
    newWindow->renderDirty = true;

    this->windows.push_back(newWindow);
    newWindow.reset();

    if (!activeWindow) {
        //std::cout << "Browser::addWindow - setting active window" << std::endl;
        activeWindow = this->windows.back().get();
    }
}

// FIXME: put quit check in here and clean up windows
void App::render() {
    // guessing during render this iterator can be invalidated
    size_t w = this->windows.size();
    //for(std::vector<std::shared_ptr<Window>>::iterator it = this->windows.begin(); it != this->windows.end(); ++it) {
        //it->get()->render();
    // definitely safer
    for(size_t i = 0; i < w; ++i) {
        glfwMakeContextCurrent(this->windows[i]->window);
        this->windows[i]->render();
    }
}

void App::loop() {
    bool shouldQuit = false;
    while (!shouldQuit) {
        //const std::clock_t begin = clock();
        this->render();
        scheduler->fireTimers(); // render may have taken some time
        double next = scheduler->getNext();
        //if (!next) std::cout << "timer starvation, refiring" << std::endl;
        /*
        while(!next) {
            std::cout << "timer starvation, refiring" << std::endl;
            scheduler->fireTimers(); // render may have taken some time
            next = scheduler->getNext();
        }
         */
        //std::cout << "Browser::loop - next timer at " << next << std::endl;
        if (next == LONG_MAX) {
            glfwWaitEvents(); // block until something changes
        } else {
            glfwWaitEventsTimeout(next / 1000);
        }
        scheduler->fireTimers(); // check before we go into render again
        //glfwWaitEventsTimeout(1.0 / 60.0); // increase the cpu from 0% to 2% on idle
        //const std::clock_t end = clock();
        //std::cout << '\r' << std::fixed << (((static_cast<double>(end - begin)) / CLOCKS_PER_SEC) * 1000) << std::scientific << " ms/f    " << std::flush;
        // FIXME: one close shouldn't close the app
        for(std::vector<std::shared_ptr<Window>>::iterator it = this->windows.begin(); it != this->windows.end(); ++it) {
            if (glfwWindowShouldClose(it->get()->window)) {
                // FIXME: just remove window from stack
                shouldQuit = true;
                break;
            }
        }
    }
}