////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2024 Marco Antognini (antognini.marco@gmail.com),
//                         Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////

#import "CocoaAppDelegate.h"

#import "NSString+stdstring.h"

#include <filesystem>

// These define are used for converting the color of the NSPopUpButton
#define BLUE  @"Blue"
#define GREEN @"Green"
#define RED   @"Red"

#pragma GCC diagnostic ignored "-Wdeprecated-declarations"

// Our PIMPL
struct SFMLmainWindow
{
    SFMLmainWindow(sf::WindowHandle win) : renderWindow(win)
    {
        logo.setSmooth(true);

        sprite.setOrigin(sprite.getLocalBounds().getCenter());
        sprite.scale({0.3f, 0.3f});
        sprite.setPosition(sf::Vector2f(renderWindow.getSize()) / 2.f);

        text.setFillColor(sf::Color::White);
    }

    std::filesystem::path resPath{[[[NSBundle mainBundle] resourcePath] tostdstring]};
    sf::RenderWindow      renderWindow;
    sf::Font              font{sf::Font::openFromFile(resPath / "tuffy.ttf").value()};
    sf::Text              text{font};
    sf::Texture           logo{sf::Texture::loadFromFile(resPath / "logo.png").value()};
    sf::Sprite            sprite{logo};
    sf::Color             background{sf::Color::Blue};
};

// Private stuff
@interface CocoaAppDelegate ()

@property (assign) SFMLmainWindow* mainWindow;
@property (retain) NSTimer*        renderTimer;
@property (assign) BOOL            visible;

@property (assign) BOOL initialized;

- (void)renderMainWindow:(NSTimer*)aTimer;

@end


// Finally, the implementation
@implementation CocoaAppDelegate

@synthesize window    = m_window;
@synthesize sfmlView  = m_sfmlView;
@synthesize textField = m_textField;

@synthesize mainWindow  = m_mainWindow;
@synthesize renderTimer = m_renderTimer;
@synthesize visible     = m_visible;

@synthesize initialized = m_initialized;

- (id)init
{
    self = [super init];
    if (self)
        self.initialized = NO;

    return self;
}

- (void)applicationDidFinishLaunching:(NSNotification*)aNotification
{
    (void)aNotification;

    if (!self.initialized)
    {
        // Init the SFML render area.
        self.mainWindow = new SFMLmainWindow(self.sfmlView);
        self.mainWindow->text.setString([self.textField.stringValue tostdwstring]);
        self.visible = YES;

        // Launch the timer to periodically display our stuff into the Cocoa view.
        self.renderTimer = [NSTimer
            timerWithTimeInterval:1.0 / 60.0
                           target:self
                         selector:@selector(renderMainWindow:)
                         userInfo:nil
                          repeats:YES];
        [[NSRunLoop mainRunLoop] addTimer:self.renderTimer forMode:NSDefaultRunLoopMode];
        [[NSRunLoop mainRunLoop] addTimer:self.renderTimer forMode:NSEventTrackingRunLoopMode];
        /*
         * This is really some ugly code but in order to have the timer fired
         * periodically we need to add it to the two above runloop mode.
         *
         * The default mode allows timer firing while the user doesn't do anything
         * while the second mode allows timer firing while he is using a slider
         * or a menu.
         */

        self.initialized = YES;
    }
}

- (void)dealloc
{
    [self.renderTimer invalidate];
    self.mainWindow->renderWindow.close();

    self.window    = nil;
    self.sfmlView  = nil;
    self.textField = nil;

    delete static_cast<SFMLmainWindow*>(self.mainWindow);
    self.mainWindow  = nil;
    self.renderTimer = nil;

    [super dealloc];
}

- (void)renderMainWindow:(NSTimer*)aTimer
{
    (void)aTimer;

    // Scaling
    /* /!\ we do this at 60fps so choose low scaling factor! /!\ */
    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Up))
        self.mainWindow->sprite.scale({1.01f, 1.01f});

    if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Down))
        self.mainWindow->sprite.scale({0.99f, 0.99f});

    // Clear the window, display some stuff and display it into our view.

    self.mainWindow->renderWindow.clear(self.mainWindow->background);

    if (self.visible)
        self.mainWindow->renderWindow.draw(self.mainWindow->sprite);

    self.mainWindow->renderWindow.draw(self.mainWindow->text);

    self.mainWindow->renderWindow.display();
}

- (IBAction)colorChanged:(NSPopUpButton*)sender
{
    if (self.initialized)
    {
        // Convert title to color
        NSString* color = [[sender selectedItem] title];
        if ([color isEqualToString:BLUE])
            self.mainWindow->background = sf::Color::Blue;
        else if ([color isEqualToString:GREEN])
            self.mainWindow->background = sf::Color::Green;
        else
            self.mainWindow->background = sf::Color::Red;
    }
}

- (IBAction)rotationChanged:(NSSlider*)sender
{
    if (self.initialized)
    {
        float angle = [sender floatValue];
        self.mainWindow->sprite.setRotation(sf::degrees(angle));
    }
}

- (IBAction)visibleChanged:(NSButton*)sender
{
    if (self.initialized)
        self.visible = [sender state] == NSOnState;
}

- (IBAction)textChanged:(NSTextField*)sender
{
    if (self.initialized)
        self.mainWindow->text.setString([[sender stringValue] tostdwstring]);
}

- (IBAction)updateText:(NSButton*)sender
{
    (void)sender;

    // Simply simulate textChanged:
    [self textChanged:self.textField];
}

@end

@implementation SilentWindow

- (void)keyDown:(NSEvent*)theEvent
{
    (void)theEvent;
    // Do nothing except preventing this alert.
}

@end