#include <thread>

#include <app/TipWindow.hpp>
#include <widget/OpaqueWidget.hpp>
#include <ui/MenuOverlay.hpp>
#include <ui/Label.hpp>
#include <ui/Button.hpp>
#include <ui/OptionButton.hpp>
#include <ui/MenuItem.hpp>
#include <ui/SequentialLayout.hpp>
#include <settings.hpp>
#include <system.hpp>


namespace rack {
namespace app {


struct UrlButton : ui::Button {
	std::string url;
	void onAction(const ActionEvent& e) override {
		system::openBrowser(url);
	}
};


struct TipInfo {
	std::string text;
	std::string linkText;
	std::string linkUrl;
};


// Remember to use “smart quotes.”
static const std::vector<TipInfo> tipInfos = {
	{"To add a module to your patch, right-click an empty rack space or press Enter. Click and drag a module from the Module Browser into the desired rack space.\n\nYou can force-move modules by holding " RACK_MOD_CTRL_NAME " while dragging them.\n\nClick and drag on empty rack space to select multiple modules.", "", ""},
	{"Pan around the rack by using the scroll bars, dragging while holding the middle mouse button, " RACK_MOD_ALT_NAME "+clicking and dragging, or pressing the arrow keys. Arrow key panning speed can be modified by holding " RACK_MOD_CTRL_NAME ", " RACK_MOD_SHIFT_NAME ", or " RACK_MOD_CTRL_NAME "+" RACK_MOD_SHIFT_NAME ".\n\nZoom in and out using the View menu, " RACK_MOD_CTRL_NAME "+scroll, or " RACK_MOD_CTRL_NAME "+= and " RACK_MOD_CTRL_NAME "+minus.", "", ""},
	// {"Want to use VCV Rack as a plugin in your DAW? VCV Rack Studio Edition is available now as a 64-bit VST 2 plugin for Ableton Live, FL Studio, Reason, REAPER, Bitwig, and more.", "Learn more", "https://vcvrack.com/Rack"},
	{"You can use Rack in fullscreen mode by selecting “View > Fullscreen“ or pressing F11.\n\nIn fullscreen mode, the menu bar and scroll bars are hidden. This is ideal for screen recording with VCV Recorder.", "Get VCV Recorder", "https://vcvrack.com/Recorder"},
	{"You can browse thousands of modules on the VCV Library website.\n\nRegister for a VCV account, log into Rack using the Library menu, and browse the VCV Library to add or purchase modules. Keep all plugins up to date by clicking “Library > Update all”.", "VCV Library", "https://library.vcvrack.com/"},
	{"Some developers of free plugins accept donations for their work. Right-click your favorite module's panel and select “Info > Donate”.\n\nYou can also donate via the module's VCV Library page.", "VCV Library", "https://library.vcvrack.com/"},
	{"You can learn more about VCV Rack by browsing the official manual.", "VCV Rack manual", "https://vcvrack.com/manual/"},
	{"Follow VCV Rack on Twitter for new module announcements, development news, and featured artists/music.", "Twitter @vcvrack", "https://twitter.com/vcvrack"},
	{"Patch cables in Rack can carry up to 16 signals. You can use this feature to build polyphonic patches using modules with the “Polyphonic” tag. Cables carrying more than 1 signal appear thicker than normal cables. To try out polyphony, add the VCV MIDI-CV module to your patch, right-click its panel, and select your desired number of polyphonic channels.", "Learn more about polyphony in VCV Rack", "https://vcvrack.com/manual/Polyphony"},
	{"Know C++ programming and want to create your own modules for Rack? Developing Rack modules is a great way to learn digital signal processing and quickly test your ideas with an easy-to-learn platform.\n\nDownload the Rack SDK and follow the development tutorial to get started.", "Plugin Development Tutorial", "https://vcvrack.com/manual/PluginDevelopmentTutorial"},
	{"Wondering how to use a particular module? Right-click its panel and choose “Info > User manual”.\n\nYou can also open the module's Info menu to view the module's tags, website, VCV Library page, and changelog, if available.", "", ""},
	{"Did you know that ModularGrid is integrated with the VCV Library? If a Eurorack hardware version of a Rack module is available, right-click its panel and choose “Info > ModularGrid”, or click the “ModularGrid” link on its VCV Library page.\n\nOn ModularGrid.net, search for the VCV logo for certain hardware modules.", "Example: Grayscale Permutation on ModularGrid", "https://www.modulargrid.net/e/grayscale-permutation-18hp"},
	{"When a context menu is open, you can " RACK_MOD_CTRL_NAME "+click a menu item to keep the menu open. This can be useful when browsing module presets or settings.", "", ""},
	// {"", "", ""},
};


struct TipWindow : widget::OpaqueWidget {
	ui::SequentialLayout* layout;
	ui::SequentialLayout* buttonLayout;
	ui::Label* label;
	UrlButton* linkButton;

	TipWindow() {
		box.size = math::Vec(550, 200);
		const float margin = 10;
		const float buttonWidth = 100;

		layout = new ui::SequentialLayout;
		layout->box.pos = math::Vec(0, 10);
		layout->box.size = box.size;
		layout->orientation = ui::SequentialLayout::VERTICAL_ORIENTATION;
		layout->margin = math::Vec(margin, margin);
		layout->spacing = math::Vec(margin, margin);
		layout->wrap = false;
		addChild(layout);

		ui::Label* header = new ui::Label;
		// header->box.size.x = box.size.x - 2*margin;
		header->box.size.y = 20;
		header->fontSize = 20;
		header->text = "Welcome to " + APP_NAME + " " + APP_VERSION;
		layout->addChild(header);

		label = new ui::Label;
		label->box.size.y = 80;
		label->box.size.x = box.size.x - 2*margin;
		layout->addChild(label);

		// Container for link button so hiding it won't shift layout
		widget::Widget* linkPlaceholder = new widget::Widget;
		layout->addChild(linkPlaceholder);

		linkButton = new UrlButton;
		linkButton->box.size.x = box.size.x - 2*margin;
		linkPlaceholder->box.size = linkButton->box.size;
		linkPlaceholder->addChild(linkButton);

		buttonLayout = new ui::SequentialLayout;
		buttonLayout->box.size.x = box.size.x - 2*margin;
		buttonLayout->spacing = math::Vec(margin, margin);
		layout->addChild(buttonLayout);

		struct ShowQuantity : Quantity {
			void setValue(float value) override {
				settings::showTipsOnLaunch = (value > 0.f);
			}
			float getValue() override {
				return settings::showTipsOnLaunch ? 1.f : 0.f;
			}
		};
		static ShowQuantity showQuantity;

		ui::OptionButton* showButton = new ui::OptionButton;
		showButton->box.size.x = 200;
		showButton->text = "Show tips at startup";
		showButton->quantity = &showQuantity;
		buttonLayout->addChild(showButton);

		struct PreviousButton : ui::Button {
			TipWindow* tipWindow;
			void onAction(const ActionEvent& e) override {
				tipWindow->advanceTip(-1);
			}
		};
		PreviousButton* prevButton = new PreviousButton;
		prevButton->box.size.x = buttonWidth;
		prevButton->text = "◀  Previous";
		prevButton->tipWindow = this;
		buttonLayout->addChild(prevButton);

		struct NextButton : ui::Button {
			TipWindow* tipWindow;
			void onAction(const ActionEvent& e) override {
				tipWindow->advanceTip();
			}
		};
		NextButton* nextButton = new NextButton;
		nextButton->box.size.x = buttonWidth;
		nextButton->text = "▶  Next";
		nextButton->tipWindow = this;
		buttonLayout->addChild(nextButton);

		struct CloseButton : ui::Button {
			TipWindow* tipWindow;
			void onAction(const ActionEvent& e) override {
				tipWindow->getParent()->requestDelete();
			}
		};
		CloseButton* closeButton = new CloseButton;
		closeButton->box.size.x = buttonWidth;
		closeButton->text = "✖  Close";
		closeButton->tipWindow = this;
		buttonLayout->addChild(closeButton);

		buttonLayout->box.size.y = closeButton->box.size.y;

		// When the TipWindow is created, choose the next tip
		advanceTip();
	}

	void advanceTip(int delta = 1) {
		// Increment tip index
		settings::tipIndex = math::eucMod(settings::tipIndex + delta, (int) tipInfos.size());

		const TipInfo& tipInfo = tipInfos[settings::tipIndex];
		label->text = tipInfo.text;
		linkButton->setVisible(tipInfo.linkText != "");
		linkButton->text = tipInfo.linkText;
		linkButton->url = tipInfo.linkUrl;
	}

	void step() override {
		OpaqueWidget::step();

		box.pos = parent->box.size.minus(box.size).div(2).round();
	}

	void draw(const DrawArgs& args) override {
		bndMenuBackground(args.vg, 0.0, 0.0, box.size.x, box.size.y, 0);
		Widget::draw(args);
	}
};


widget::Widget* tipWindowCreate() {
	ui::MenuOverlay* overlay = new ui::MenuOverlay;
	overlay->bgColor = nvgRGBAf(0, 0, 0, 0.33);

	TipWindow* tipWindow = new TipWindow;
	overlay->addChild(tipWindow);

	return overlay;
}


} // namespace app
} // namespace rack