#include "GOLTool.h"
#include "prefs/GlobalPrefs.h"
#include "client/Client.h"
#include "common/tpt-rand.h"
#include "simulation/GOLString.h"
#include "simulation/SimulationData.h"
#include "gui/Style.h"
#include "gui/interface/Button.h"
#include "gui/interface/Label.h"
#include "gui/interface/Textbox.h"
#include "gui/interface/Window.h"
#include "gui/colourpicker/ColourPickerActivity.h"
#include "gui/dialogues/ErrorMessage.h"
#include "gui/game/GameModel.h"
#include "graphics/Graphics.h"

class GOLWindow: public ui::Window
{
	ui::Colour highColour, lowColour;
	ui::Button *highColourButton, *lowColourButton;
	ui::Textbox *nameField, *ruleField;
	GameModel &gameModel;
	int toolSelection;

	void updateGradient();
	void validate();

public:
	GOLWindow(GameModel &gameModel, int toolSelection, int rule, RGB colour1, RGB colour2);

	virtual ~GOLWindow()
	{}

	void OnDraw() override;
	void OnTryExit(ExitMethod method) override;
};

GOLWindow::GOLWindow(GameModel &gameModel_, int toolSelection, int rule, RGB colour1, RGB colour2):
	ui::Window(ui::Point(-1, -1), ui::Point(200, 108)),
	highColour(colour1.WithAlpha(0xFF)),
	lowColour(colour2.WithAlpha(0xFF)),
	gameModel(gameModel_),
	toolSelection(toolSelection)
{
	highColour.Alpha = 255;
	lowColour.Alpha = 255;
	ui::Label * messageLabel = new ui::Label(ui::Point(4, 5), ui::Point(Size.X-8, 14), ByteString("编辑自定义GOL类型").FromUtf8());
	messageLabel->SetTextColour(style::Colour::InformationTitle);
	messageLabel->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
	messageLabel->Appearance.VerticalAlign = ui::Appearance::AlignTop;
	AddComponent(messageLabel);

	auto *okayButton = new ui::Button(ui::Point(0, Size.Y-17), ui::Point(Size.X, 17), "OK");
	okayButton->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
	okayButton->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
	okayButton->Appearance.BorderInactive = ui::Colour(200, 200, 200);
	okayButton->SetActionCallback({ [this] {
		if (nameField->GetText().length() && ruleField->GetText().length())
		{
			CloseActiveWindow();
			validate();
			SelfDestruct();
		}
	} });
	AddComponent(okayButton);
	SetOkayButton(okayButton);

	nameField = new ui::Textbox(ui::Point(8, 25), ui::Point(Size.X-16, 16), "", "[名称]");
	nameField->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
	nameField->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
	nameField->SetLimit(7);
	AddComponent(nameField);
	FocusComponent(nameField);

	ruleField = new ui::Textbox(ui::Point(8, 46), ui::Point(Size.X-16, 16), "", "[规则]");
	ruleField->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
	ruleField->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
	AddComponent(ruleField);
	FocusComponent(ruleField);

	highColourButton = new ui::Button(ui::Point(8, 67), ui::Point(16, 16), "");
	highColourButton->SetActionCallback({ [this] {
		new ColourPickerActivity(highColour, [this](ui::Colour colour) {
			highColour = colour;
			updateGradient();
		});
	} });
	AddComponent(highColourButton);

	lowColourButton = new ui::Button(ui::Point(Size.X - 24, 67), ui::Point(16, 16), "");
	lowColourButton->SetActionCallback({ [this] {
		new ColourPickerActivity(lowColour, [this](ui::Colour colour) {
			lowColour = colour;
			updateGradient();
		});
	} });
	AddComponent(lowColourButton);

	if (rule)
	{
		ruleField->SetText(SerialiseGOLRule(rule));
		nameField->SetText("");
	}
	else
	{
		auto &prefs = GlobalPrefs::Ref();
		ruleField->SetText(prefs.Get("CustomGOL.Rule", String("B3/S23")));
		nameField->SetText(prefs.Get("CustomGOL.Name", String("CGOL")));
		highColour.Red = interfaceRng.between(0x80, 0xFF);
		highColour.Green = interfaceRng.between(0x80, 0xFF);
		highColour.Blue = interfaceRng.between(0x80, 0xFF);
		highColour.Alpha = 0xFF;
		lowColour.Red = interfaceRng.between(0x00, 0x7F);
		lowColour.Green = interfaceRng.between(0x00, 0x7F);
		lowColour.Blue = interfaceRng.between(0x00, 0x7F);
		lowColour.Alpha = 0xFF;
	}
	updateGradient();

	MakeActiveWindow();
}

void GOLWindow::updateGradient()
{
	highColourButton->Appearance.BackgroundInactive = highColour;
	highColourButton->Appearance.BackgroundHover = highColour;
	lowColourButton->Appearance.BackgroundInactive = lowColour;
	lowColourButton->Appearance.BackgroundHover = lowColour;
}

void GOLWindow::validate()
{
	auto &sd = SimulationData::CRef();
	auto nameString = nameField->GetText();
	auto ruleString = ruleField->GetText();
	if (!ValidateGOLName(nameString))
	{
		new ErrorMessage(ByteString("无法添加GOL类型").FromUtf8(), ByteString("提供的名称无效").FromUtf8());
		return;
	}
	nameString = nameString.ToUpper();
	int rule = ParseGOLString(ruleString);
	if (rule == -1)
	{
		new ErrorMessage(ByteString("无法添加GOL类型").FromUtf8(), ByteString("提供的规则无效").FromUtf8());
		return;
	}
	if (sd.GetCustomGOLByRule(rule))
	{
		new ErrorMessage(ByteString("无法添加GOL类型").FromUtf8(), ByteString("此规则已经存在").FromUtf8());
		return;
	}
	ruleString = SerialiseGOLRule(rule); // * Make it canonical.

	{
		auto &prefs = GlobalPrefs::Ref();
		Prefs::DeferWrite dw(prefs);
		prefs.Set("CustomGOL.Name", nameString);
		prefs.Set("CustomGOL.Rule", ruleString);
	}

	if (!gameModel.AddCustomGol(ruleString, nameString, highColour.NoAlpha(), lowColour.NoAlpha()))
	{
		new ErrorMessage(ByteString("无法添加GOL类型").FromUtf8(), ByteString("名称已经存在").FromUtf8());
		return;
	}

	gameModel.SelectNextIdentifier = "DEFAULT_PT_LIFECUST_" + nameString.ToAscii();
	gameModel.SelectNextTool = toolSelection;
}

void GOLWindow::OnTryExit(ExitMethod method)
{
	CloseActiveWindow();
	SelfDestruct();
}

void GOLWindow::OnDraw()
{
	Graphics * g = GetGraphics();

	g->DrawFilledRect(RectSized(Position - Vec2{ 1, 1 }, Size + Vec2{ 2, 2 }), 0x000000_rgb);
	g->DrawRect(RectSized(Position, Size), 0xC8C8C8_rgb);

	int width = Size.X - 60;
	for (int xx = 0; xx < width; ++xx)
	{
		auto f = xx / (float)width;
		for (int yy = 0; yy < 16; ++yy)
		{
			auto rr = int(highColour.Red * (1.f - f) + lowColour.Red * f);
			auto gg = int(highColour.Green * (1.f - f) + lowColour.Green * f);
			auto bb = int(highColour.Blue * (1.f - f) + lowColour.Blue * f);
			g->DrawPixel(Position + Vec2{ xx + 30, yy + 67 }, RGB(rr, gg, bb));
		}
	}
}

void GOLTool::OpenWindow(Simulation *sim, int toolSelection, int rule, RGB colour1, RGB colour2)
{
	new GOLWindow(gameModel, toolSelection, rule, colour1, colour2);
}

void GOLTool::Select(int toolSelection)
{
	OpenWindow(gameModel.GetSimulation(), toolSelection);
}
