//Copyright (c) 2017 <>< David Chapman - Under the MIT/x11 or NewBSD License you choose.
//Copyright (C) 2017 Viknet, MIT/x11 License or NewBSD License you choose.

#import <Cocoa/Cocoa.h>

#define RASTERIZER

#include "CNFGFunctions.h"
#include "CNFGRasterizer.h"

id app_menubar, app_appMenuItem, app_appMenu, app_appName, app_quitMenuItem, app_quitTitle, app_quitMenuItem, app_window;
id app_imageView;

NSAutoreleasePool *app_pool;
int app_sw=0, app_sh=0;
int app_mouseX=0, app_mouseY=0;
BOOL inFullscreen = false;

void CNFGGetDimensions( short * x, short * y )
{
    *x = app_sw;
    *y = app_sh;
}

void CNFGSetupFullscreen( const char * WindowName, int screen_number )
{
    app_sw=640; app_sh=480;
    inFullscreen = YES;
    [NSApplication sharedApplication];
    [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
    app_menubar = [[NSMenu new] autorelease];
    app_appMenuItem = [[NSMenuItem new] autorelease];
    [app_menubar addItem:app_appMenuItem];
    [NSApp setMainMenu:app_menubar];
    app_appMenu = [[NSMenu new] autorelease];
    app_appName = [[NSProcessInfo processInfo] processName];
    app_quitTitle = [@"Quit " stringByAppendingString:app_appName];
    app_quitMenuItem = [[[NSMenuItem alloc] initWithTitle:app_quitTitle
        action:@selector(terminate:) keyEquivalent:@"q"] autorelease];
    [app_appMenu addItem:app_quitMenuItem];
    [app_appMenuItem setSubmenu:app_appMenu];

    NSString *title = [[[NSString alloc] initWithCString: WindowName encoding: NSUTF8StringEncoding] autorelease];
    app_imageView = [NSImageView new];
    NSDictionary *fullScreenOptions = [[NSDictionary dictionaryWithObjectsAndKeys: 
        [NSNumber numberWithInt: 
            (NSApplicationPresentationAutoHideMenuBar | NSApplicationPresentationAutoHideDock) ],
        NSFullScreenModeApplicationPresentationOptions, nil] retain];
    [app_imageView enterFullScreenMode:[[NSScreen screens] objectAtIndex:screen_number] withOptions:fullScreenOptions];
    [app_imageView unregisterDraggedTypes];
    CGSize app_imageSize = [app_imageView frame].size;
    app_sw = app_imageSize.width; app_sh = app_imageSize.height;
    [NSApp finishLaunching];
    [NSApp updateWindows];
    app_pool = [NSAutoreleasePool new];
}

int CNFGSetup( const char * WindowName, int sw, int sh )
{
    app_sw=sw; app_sh=sh;
    [NSApplication sharedApplication];
    [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
    app_menubar = [[NSMenu new] autorelease];
    app_appMenuItem = [[NSMenuItem new] autorelease];
    [app_menubar addItem:app_appMenuItem];
    [NSApp setMainMenu:app_menubar];
    app_appMenu = [[NSMenu new] autorelease];
    app_appName = [[NSProcessInfo processInfo] processName];
    app_quitTitle = [@"Quit " stringByAppendingString:app_appName];
    app_quitMenuItem = [[[NSMenuItem alloc] initWithTitle:app_quitTitle
        action:@selector(terminate:) keyEquivalent:@"q"] autorelease];
    [app_appMenu addItem:app_quitMenuItem];
    [app_appMenuItem setSubmenu:app_appMenu];
    app_window = [[[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, app_sw, app_sh)
        styleMask:NSWindowStyleMaskBorderless | NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable backing:NSBackingStoreBuffered defer:NO]
            autorelease];

    NSString *title = [[[NSString alloc] initWithCString: WindowName encoding: NSUTF8StringEncoding] autorelease];
    [app_window setTitle:title];
    app_imageView = [NSImageView new];
    [app_window setContentView:app_imageView];
    [app_window cascadeTopLeftFromPoint:NSMakePoint(20,20)];
    [app_window makeKeyAndOrderFront:nil];
    [NSApp activateIgnoringOtherApps:YES];
    [NSApp finishLaunching];
    [NSApp updateWindows];
    app_pool = [[NSAutoreleasePool alloc] init];
	return 0;
}

#define XK_Left                          0xff51  /* Move left, left arrow */
#define XK_Up                            0xff52  /* Move up, up arrow */
#define XK_Right                         0xff53  /* Move right, right arrow */
#define XK_Down                          0xff54  /* Move down, down arrow */
#define KEY_UNDEFINED 255
#define KEY_LEFT_MOUSE 0

static int keycode(key)
{
    if (key < 256) return key;
    switch(key) {
        case 63232: return XK_Up;
        case 63233: return XK_Down;
        case 63234: return XK_Left;
        case 63235: return XK_Right;
    }
    return KEY_UNDEFINED;
}

void CNFGHandleInput()
{
    // Quit if no open windows left
    // if ([[NSApp windows] count] == 0) [NSApp terminate: nil];

    //----------------------
    // Peek at the next event
    //----------------------
    NSDate *app_currDate = [NSDate new];
    // If we have events, handle them!
    NSEvent *event;
    for (;(event = [NSApp
                    nextEventMatchingMask:NSEventMaskAny
                    untilDate:app_currDate
                    inMode:NSDefaultRunLoopMode
                    dequeue:YES]);)
    {
        NSPoint local_point;
        NSEventType type = [event type];
        switch (type)
        {
            case NSEventTypeKeyDown:
                for (int i=0; i<[event.characters length]; i++) {
                    unichar ch = [event.characters characterAtIndex: i];
                    HandleKey(keycode(ch), 1);
                }
                break;
                
            case NSEventTypeKeyUp:
                for (int i=0; i<[event.characters length]; i++) {
                    unichar ch = [event.characters characterAtIndex: i];
                    HandleKey(keycode(ch), 0);
                }
                break;
                    
            case NSEventTypeMouseMoved:
            case NSEventTypeLeftMouseDragged:
            case NSEventTypeRightMouseDragged:
            case NSEventTypeOtherMouseDragged:
                if (inFullscreen){
                    local_point = [NSEvent mouseLocation];
                } else {
                    if ([event window] == nil) break;
                    NSPoint event_location = event.locationInWindow;
                    local_point = [app_imageView convertPoint:event_location fromView:nil];
                }
                app_mouseX = fmax(fmin(local_point.x, app_sw), 0);
                // Y coordinate must be inversed?
                app_mouseY = fmax(fmin(app_sh - local_point.y, app_sh), 0);
                HandleMotion(app_mouseX, app_mouseY, [NSEvent pressedMouseButtons]);
                break;  

            case NSEventTypeLeftMouseDown:
            case NSEventTypeRightMouseDown:
            case NSEventTypeOtherMouseDown:
                // Button number start from 1?
                HandleButton(app_mouseX, app_mouseY, event.buttonNumber+1, 1); 
                break;
                    
            case NSEventTypeLeftMouseUp:
            case NSEventTypeRightMouseUp:
            case NSEventTypeOtherMouseUp:
                HandleButton(app_mouseX, app_mouseY, event.buttonNumber+1, 0);
                break;

            default:
                break;
        }
        [NSApp sendEvent:event];
    }
    [app_currDate release];
}

void CNFGUpdateScreenWithBitmap( unsigned long * data, int w, int h )
{
    [app_pool release];
    app_pool = [NSAutoreleasePool new];

    NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc]
        initWithBitmapDataPlanes:(unsigned char **)&data pixelsWide:w
        pixelsHigh:h bitsPerSample:8 samplesPerPixel:3 hasAlpha:NO
        isPlanar:NO colorSpaceName:NSCalibratedRGBColorSpace
        bitmapFormat: 0
        bytesPerRow:(w*4) bitsPerPixel:32];

    id new_image = [[[NSImage alloc] initWithSize:[bitmap size]] autorelease];
    [new_image addRepresentation:bitmap];
    [app_imageView setImage: new_image];
    [app_imageView setNeedsDisplay:YES];
    [bitmap release];
}