/*
     File: MovieControllerLayer.m
 
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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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 */

#import <WebKit/npapi.h>
#import <WebKit/npfunctions.h>
#import <WebKit/npruntime.h>

#import <QuartzCore/QuartzCore.h>
#import <QTKit/QTKit.h>

#import "MovieControllerLayer.h"

// Browser function table
static NPNetscapeFuncs* browser;

// Structure for per-instance storage
typedef struct PluginObject
{
    NPP npp;
    
    NPWindow window;
    
    CALayer *rootLayer;
    MovieControllerLayer *controllerLayer;
    QTMovieLayer *movieLayer;
    
    CALayer *mouseDownLayer;
    
    NSURL *movieURL;
    QTMovie *movie;
} PluginObject;

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16 mode, int16 argc, char* argn[], char* argv[], NPSavedData* saved);
NPError NPP_Destroy(NPP instance, NPSavedData** save);
NPError NPP_SetWindow(NPP instance, NPWindow* window);
NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream* stream, NPBool seekable, uint16* stype);
NPError NPP_DestroyStream(NPP instance, NPStream* stream, NPReason reason);
int32 NPP_WriteReady(NPP instance, NPStream* stream);
int32 NPP_Write(NPP instance, NPStream* stream, int32 offset, int32 len, void* buffer);
void NPP_StreamAsFile(NPP instance, NPStream* stream, const char* fname);
void NPP_Print(NPP instance, NPPrint* platformPrint);
int16 NPP_HandleEvent(NPP instance, void* event);
void NPP_URLNotify(NPP instance, const char* URL, NPReason reason, void* notifyData);
NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value);
NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value);

#pragma export on
// Mach-o entry points
NPError NP_Initialize(NPNetscapeFuncs *browserFuncs);
NPError NP_GetEntryPoints(NPPluginFuncs *pluginFuncs);
void NP_Shutdown(void);
#pragma export off

NPError NP_Initialize(NPNetscapeFuncs* browserFuncs)
{
    browser = browserFuncs;
    return NPERR_NO_ERROR;
}

NPError NP_GetEntryPoints(NPPluginFuncs* pluginFuncs)
{
    pluginFuncs->version = 11;
    pluginFuncs->size = sizeof(pluginFuncs);
    pluginFuncs->newp = NPP_New;
    pluginFuncs->destroy = NPP_Destroy;
    pluginFuncs->setwindow = NPP_SetWindow;
    pluginFuncs->newstream = NPP_NewStream;
    pluginFuncs->destroystream = NPP_DestroyStream;
    pluginFuncs->asfile = NPP_StreamAsFile;
    pluginFuncs->writeready = NPP_WriteReady;
    pluginFuncs->write = (NPP_WriteProcPtr)NPP_Write;
    pluginFuncs->print = NPP_Print;
    pluginFuncs->event = NPP_HandleEvent;
    pluginFuncs->urlnotify = NPP_URLNotify;
    pluginFuncs->getvalue = NPP_GetValue;
    pluginFuncs->setvalue = NPP_SetValue;
    
    return NPERR_NO_ERROR;
}

void NP_Shutdown(void)
{

}

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16 mode, int16 argc, char* argn[], char* argv[], NPSavedData* saved)
{
    // Create per-instance storage
    PluginObject *obj = (PluginObject *)malloc(sizeof(PluginObject));
    bzero(obj, sizeof(PluginObject));
    
    obj->npp = instance;
    instance->pdata = obj;
    
    // Ask the browser if it supports the Core Animation drawing model
    NPBool supportsCoreAnimation;
    if (browser->getvalue(instance, NPNVsupportsCoreAnimationBool, &supportsCoreAnimation) != NPERR_NO_ERROR)
        supportsCoreAnimation = FALSE;
    
    if (!supportsCoreAnimation)
        return NPERR_INCOMPATIBLE_VERSION_ERROR;
    
    // If the browser supports the Core Animation drawing model, enable it.
    browser->setvalue(instance, NPPVpluginDrawingModel, (void *)NPDrawingModelCoreAnimation);

    // If the browser supports the Cocoa event model, enable it.
    NPBool supportsCocoa;
    if (browser->getvalue(instance, NPNVsupportsCocoaBool, &supportsCocoa) != NPERR_NO_ERROR)
        supportsCocoa = FALSE;
    
    if (!supportsCocoa)
        return NPERR_INCOMPATIBLE_VERSION_ERROR;
    
    browser->setvalue(instance, NPPVpluginEventModel, (void *)NPEventModelCocoa);
    
    for (int16 i = 0; i < argc; i++) {
        if (strcasecmp(argn[i], "movieurl") == 0) {
            NSString *urlString = [NSString stringWithUTF8String:argv[i]];
            if (urlString) 
                obj->movieURL = [[NSURL URLWithString:urlString] retain];
            break;
        }
        
    }
    
    return NPERR_NO_ERROR;
}

NPError NPP_Destroy(NPP instance, NPSavedData** save)
{
    // Free per-instance storage
    PluginObject *obj = instance->pdata;

    [obj->movie stop];
    [obj->rootLayer release];
    
    free(obj);
    
    return NPERR_NO_ERROR;
}

NPError NPP_SetWindow(NPP instance, NPWindow* window)
{
    PluginObject *obj = instance->pdata;
    obj->window = *window;

    return NPERR_NO_ERROR;
}
 

NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream* stream, NPBool seekable, uint16* stype)
{
    *stype = NP_ASFILEONLY;
    return NPERR_NO_ERROR;
}

NPError NPP_DestroyStream(NPP instance, NPStream* stream, NPReason reason)
{
    return NPERR_NO_ERROR;
}

int32 NPP_WriteReady(NPP instance, NPStream* stream)
{
    return 0;
}

int32 NPP_Write(NPP instance, NPStream* stream, int32 offset, int32 len, void* buffer)
{
    return 0;
}

void NPP_StreamAsFile(NPP instance, NPStream* stream, const char* fname)
{
}

void NPP_Print(NPP instance, NPPrint* platformPrint)
{

}

static void handleMouseDown(PluginObject *obj, NPCocoaEvent *event)
{
    CGPoint point = CGPointMake(event->data.mouse.pluginX, 
                                // Flip the y coordinate
                                obj->window.height - event->data.mouse.pluginY);
    
    obj->mouseDownLayer = [obj->rootLayer hitTest:point];
    if (obj->mouseDownLayer == obj->controllerLayer) {
        [obj->controllerLayer handleMouseDown:[obj->rootLayer convertPoint:point toLayer:obj->controllerLayer]];
        return;
    }    
}

static void togglePlayPause(PluginObject *obj)
{
    if (!obj->movie)
        return;
    
    if ([obj->movie rate] == 0)
        [obj->movie play];
    else
        [obj->movie stop];

}

static void handleMouseUp(PluginObject *obj, NPCocoaEvent *event)
{
    CGPoint point = CGPointMake(event->data.mouse.pluginX, 
                                // Flip the y coordinate
                                obj->window.height - event->data.mouse.pluginY);

    CALayer *mouseDownLayer = obj->mouseDownLayer;
    obj->mouseDownLayer = nil;
    if (mouseDownLayer == obj->controllerLayer) {
        [obj->controllerLayer handleMouseUp:[obj->rootLayer convertPoint:point toLayer:obj->controllerLayer]];
        return;
    }
}

static void handleMouseDragged(PluginObject *obj, NPCocoaEvent *event)
{
    CGPoint point = CGPointMake(event->data.mouse.pluginX, 
                                // Flip the y coordinate
                                obj->window.height - event->data.mouse.pluginY);
    
    if (obj->mouseDownLayer == obj->controllerLayer) {
        [obj->controllerLayer handleMouseDragged:[obj->rootLayer convertPoint:point toLayer:obj->controllerLayer]];
        return;
    }    
}

static void handleMouseEntered(PluginObject *obj)
{
    // Show the controller layer.
    obj->controllerLayer.opacity = 1.0;
}

static void handleMouseExited(PluginObject *obj)
{
    // Hide the controller layer if the movie is playing.
    if ([obj->movie rate])
        obj->controllerLayer.opacity = 0.0;
}

static int handleKeyDown(PluginObject *obj, NPCocoaEvent *event)
{
    NSString *characters = (NSString *)event->data.key.characters;
    
    if ([characters length] == 1 && [characters characterAtIndex:0] == ' ') {
        togglePlayPause(obj);
        return 1;
    }
    
    return 0;
}


static int handleScrollEvent(PluginObject *obj, NPCocoaEvent *event)
{
    double delta = event->data.mouse.deltaY;
    if (delta < 0)
        [obj->movie stepForward];
    else
        [obj->movie stepBackward];
    return 0;
}


int16 NPP_HandleEvent(NPP instance, void* event)
{
    PluginObject *obj = instance->pdata;

    NPCocoaEvent *cocoaEvent = event;
    
    switch(cocoaEvent->type) {
        case NPCocoaEventMouseDown:
            handleMouseDown(obj, cocoaEvent);
            return 1;
        case NPCocoaEventMouseUp:
            handleMouseUp(obj, cocoaEvent);
            return 1;
        case NPCocoaEventMouseDragged:
            handleMouseDragged(obj, cocoaEvent);
            return 1;
        case NPCocoaEventMouseEntered:
            handleMouseEntered(obj);
            return 1;
        case NPCocoaEventMouseExited:
            handleMouseExited(obj);
            return 1;
        case NPCocoaEventKeyDown:
            return handleKeyDown(obj, cocoaEvent);
        case NPCocoaEventScrollWheel:
            return handleScrollEvent(obj, cocoaEvent);
    }
    
    return 0;
}

void NPP_URLNotify(NPP instance, const char* url, NPReason reason, void* notifyData)
{

}

NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value)
{
    PluginObject *obj = instance->pdata;

    switch (variable) {
        case NPPVpluginCoreAnimationLayer:
            if (!obj->rootLayer) {
                // Setup layer hierarchy.
                obj->rootLayer = [[CALayer layer] retain];
                
                obj->movieLayer = [QTMovieLayer layer];
                obj->movieLayer.autoresizingMask = kCALayerWidthSizable | kCALayerHeightSizable;
                [obj->rootLayer addSublayer:obj->movieLayer];

                obj->controllerLayer = [MovieControllerLayer layer];
                [obj->rootLayer addSublayer:obj->controllerLayer];
                
                if (obj->movieURL) {
                    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:obj->movieURL, QTMovieURLAttribute,
                                                [NSNumber numberWithBool:YES], QTMovieOpenForPlaybackAttribute, 
                                                [NSNumber numberWithBool:YES], QTMovieLoopsAttribute, 
                                                nil];
                    obj->movie = [QTMovie movieWithAttributes:attributes error:nil];

                    if (obj->movie) {
                        obj->movieLayer.movie = obj->movie;
                        [obj->controllerLayer setMovie:obj->movie];
                    }
                }
                    
            }
            
            // Make sure to return a retained layer
            *((CALayer **)value) = [obj->rootLayer retain];
            
            return NPERR_NO_ERROR;
            
        default:
            return NPERR_GENERIC_ERROR;
    }
}

NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value)
{
    return NPERR_GENERIC_ERROR;
}