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#include <stdlib.h>
#include <stdio.h>
#include <wtf/Platform.h>
#include "PluginObject.h"

#ifdef WIN32
#define strcasecmp _stricmp
#define NPAPI WINAPI
#else
#define NPAPI
#endif

#if defined(OS_LINUX)
#include <X11/Xlib.h>
#endif

static void log(NPP instance, const char* format, ...)
{
    va_list args;
    va_start(args, format);
    char message[2048] = "PLUGIN: ";
    vsprintf(message + strlen(message), format, args);
    va_end(args);

    NPObject* windowObject = 0;
    NPError error = browser->getvalue(instance, NPNVWindowNPObject, &windowObject);
    if (error != NPERR_NO_ERROR) {
        fprintf(stderr, "Failed to retrieve window object while logging: %s\n", message);
        return;
    }

    NPVariant consoleVariant;
    if (!browser->getproperty(instance, windowObject, browser->getstringidentifier("console"), &consoleVariant)) {
        fprintf(stderr, "Failed to retrieve console object while logging: %s\n", message);
        browser->releaseobject(windowObject);
        return;
    }

    NPObject* consoleObject = NPVARIANT_TO_OBJECT(consoleVariant);

    NPVariant messageVariant;
    STRINGZ_TO_NPVARIANT(message, messageVariant);

    NPVariant result;
    if (!browser->invoke(instance, consoleObject, browser->getstringidentifier("log"), &messageVariant, 1, &result)) {
        fprintf(stderr, "Failed to invoke console.log while logging: %s\n", message);
        browser->releaseobject(consoleObject);
        browser->releaseobject(windowObject);
        return;
    }

    browser->releasevariantvalue(&result);
    browser->releaseobject(consoleObject);
    browser->releaseobject(windowObject);
}

// Plugin entry points
extern "C" {
    NPError NPAPI NP_Initialize(NPNetscapeFuncs *browserFuncs
#if defined(OS_LINUX)
                                , NPPluginFuncs *pluginFuncs
#endif
                                );
    NPError NPAPI NP_GetEntryPoints(NPPluginFuncs *pluginFuncs);
    void NPAPI NP_Shutdown(void);

#if defined(OS_LINUX)
    NPError NP_GetValue(NPP instance, NPPVariable variable, void *value);
    const char* NP_GetMIMEDescription(void);
#endif
}

// Plugin entry points
NPError NPAPI NP_Initialize(NPNetscapeFuncs *browserFuncs
#if defined(OS_LINUX)
                            , NPPluginFuncs *pluginFuncs
#endif
)
{
    browser = browserFuncs;
#if defined(OS_LINUX)
    return NP_GetEntryPoints(pluginFuncs);
#else
    return NPERR_NO_ERROR;
#endif
}

NPError NPAPI 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 NPAPI NP_Shutdown(void)
{
}

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16 mode, int16 argc, char *argn[], char *argv[], NPSavedData *saved)
{
    if (browser->version >= 14) {
        PluginObject* obj = (PluginObject*)browser->createobject(instance, getPluginClass());

        for (int i = 0; i < argc; i++) {
            if (strcasecmp(argn[i], "onstreamload") == 0 && !obj->onStreamLoad)
                obj->onStreamLoad = strdup(argv[i]);
            else if (strcasecmp(argn[i], "onStreamDestroy") == 0 && !obj->onStreamDestroy)
                obj->onStreamDestroy = strdup(argv[i]);
            else if (strcasecmp(argn[i], "onURLNotify") == 0 && !obj->onURLNotify)
                obj->onURLNotify = strdup(argv[i]);
            else if (strcasecmp(argn[i], "logfirstsetwindow") == 0)
                obj->logSetWindow = TRUE;
            else if (strcasecmp(argn[i], "logSrc") == 0) {
                for (int i = 0; i < argc; i++) {
                    if (strcasecmp(argn[i], "src") == 0) {
                        log(instance, "src: %s", argv[i]);
                        fflush(stdout);
                    }
                }
            }
        }

        instance->pdata = obj;
    }

    // On Windows and Unix, plugins only get events if they are windowless.
    return browser->setvalue(instance, NPPVpluginWindowBool, NULL);
}

NPError NPP_Destroy(NPP instance, NPSavedData **save)
{
    PluginObject* obj = static_cast<PluginObject*>(instance->pdata);
    if (obj) {
        if (obj->onStreamLoad)
            free(obj->onStreamLoad);

        if (obj->onURLNotify)
            free(obj->onURLNotify);

        if (obj->onStreamDestroy)
            free(obj->onStreamDestroy);

        if (obj->logDestroy)
            log(instance, "NPP_Destroy");

        browser->releaseobject(&obj->header);
    }

    fflush(stdout);

    return NPERR_NO_ERROR;
}

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

    if (obj) {
        if (obj->logSetWindow) {
            log(instance, "NPP_SetWindow: %d %d", (int)window->width, (int)window->height);
            fflush(stdout);
            obj->logSetWindow = false;
        }
    }

    return NPERR_NO_ERROR;
}

static void executeScript(const PluginObject* obj, const char* script)
{
    NPObject *windowScriptObject;
    browser->getvalue(obj->npp, NPNVWindowNPObject, &windowScriptObject);

    NPString npScript;
    npScript.UTF8Characters = script;
    npScript.UTF8Length = strlen(script);

    NPVariant browserResult;
    browser->evaluate(obj->npp, windowScriptObject, &npScript, &browserResult);
    browser->releasevariantvalue(&browserResult);
}

NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream *stream, NPBool seekable, uint16 *stype)
{
    PluginObject* obj = static_cast<PluginObject*>(instance->pdata);

    if (obj->returnErrorFromNewStream)
        return NPERR_GENERIC_ERROR;

    obj->stream = stream;
    *stype = NP_ASFILEONLY;

    if (browser->version >= NPVERS_HAS_RESPONSE_HEADERS)
        notifyStream(obj, stream->url, stream->headers);

    if (obj->onStreamLoad)
        executeScript(obj, obj->onStreamLoad);

    return NPERR_NO_ERROR;
}

NPError NPP_DestroyStream(NPP instance, NPStream *stream, NPReason reason)
{
    PluginObject* obj = static_cast<PluginObject*>(instance->pdata);

    if (obj->onStreamDestroy)
        executeScript(obj, obj->onStreamDestroy);

    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)
{
}

int16 NPP_HandleEvent(NPP instance, void *event)
{
    PluginObject* obj = static_cast<PluginObject*>(instance->pdata);
    if (!obj->eventLogging)
        return 0;

#ifdef WIN32
    // Below is the event handling code.  Per the NPAPI spec, the events don't
    // map directly between operating systems:
    // http://devedge-temp.mozilla.org/library/manuals/2002/plugin/1.0/structures5.html#1000000
    NPEvent* evt = static_cast<NPEvent*>(event);
    short x = static_cast<short>(evt->lParam & 0xffff);
    short y = static_cast<short>(evt->lParam >> 16);
    switch (evt->event) {
        case WM_PAINT:
            log(instance, "updateEvt");
            break;
        case WM_LBUTTONDOWN:
        case WM_MBUTTONDOWN:
        case WM_RBUTTONDOWN:
            log(instance, "mouseDown at (%d, %d)", x, y);
            break;
        case WM_LBUTTONUP:
        case WM_MBUTTONUP:
        case WM_RBUTTONUP:
            log(instance, "mouseUp at (%d, %d)", x, y);
            break;
        case WM_LBUTTONDBLCLK:
        case WM_MBUTTONDBLCLK:
        case WM_RBUTTONDBLCLK:
            break;
        case WM_MOUSEMOVE:
            log(instance, "adjustCursorEvent");
            break;
        case WM_KEYUP:
            // TODO(tc): We need to convert evt->wParam from virtual-key code
            // to key code.
            log(instance, "NOTIMPLEMENTED: keyUp '%c'", ' ');
            break;
        case WM_KEYDOWN:
            // TODO(tc): We need to convert evt->wParam from virtual-key code
            // to key code.
            log(instance, "NOTIMPLEMENTED: keyDown '%c'", ' ');
            break;
        case WM_SETCURSOR:
            break;
        case WM_SETFOCUS:
            log(instance, "getFocusEvent");
            break;
        case WM_KILLFOCUS:
            log(instance, "loseFocusEvent");
            break;
        default:
            log(instance, "event %d", evt->event);
    }

    fflush(stdout);

#elif defined(OS_LINUX)
    XEvent* evt = static_cast<XEvent*>(event);
    XButtonPressedEvent* bpress_evt = reinterpret_cast<XButtonPressedEvent*>(evt);
    XButtonReleasedEvent* brelease_evt = reinterpret_cast<XButtonReleasedEvent*>(evt);
    switch (evt->type) {
        case ButtonPress:
            log(instance, "mouseDown at (%d, %d)", bpress_evt->x, bpress_evt->y);
            break;
        case ButtonRelease:
            log(instance, "mouseUp at (%d, %d)", brelease_evt->x, brelease_evt->y);
            break;
        case KeyPress:
            // TODO: extract key code
            log(instance, "NOTIMPLEMENTED: keyDown '%c'", ' ');
            break;
        case KeyRelease:
            // TODO: extract key code
            log(instance, "NOTIMPLEMENTED: keyUp '%c'", ' ');
            break;
        case GraphicsExpose:
            log(instance, "updateEvt");
            break;
        // NPAPI events
        case FocusIn:
            log(instance, "getFocusEvent");
            break;
        case FocusOut:
            log(instance, "loseFocusEvent");
            break;
        case EnterNotify:
        case LeaveNotify:
        case MotionNotify:
            log(instance, "adjustCursorEvent");
            break;
        default:
            log(instance, "event %d", evt->type);
    }

    fflush(stdout);
#else

#ifdef MAC_EVENT_CODE_DISABLED_DUE_TO_ERRORS
// This code apparently never built on Mac, but Mac was previously
// using the Linux branch.  It doesn't quite build.
// warning: 'GlobalToLocal' is deprecated (declared at
// .../Frameworks/QD.framework/Headers/QuickdrawAPI.h:2181)
    EventRecord* evt = static_cast<EventRecord*>(event);
    Point pt = { evt->where.v, evt->where.h };
    switch (evt->what) {
        case nullEvent:
            // these are delivered non-deterministically, don't log.
            break;
        case mouseDown:
            GlobalToLocal(&pt);
            log(instance, "mouseDown at (%d, %d)", pt.h, pt.v);
            break;
        case mouseUp:
            GlobalToLocal(&pt);
            log(instance, "mouseUp at (%d, %d)", pt.h, pt.v);
            break;
        case keyDown:
            log(instance, "keyDown '%c'", (char)(evt->message & 0xFF));
            break;
        case keyUp:
            log(instance, "keyUp '%c'", (char)(evt->message & 0xFF));
            break;
        case autoKey:
            log(instance, "autoKey '%c'", (char)(evt->message & 0xFF));
            break;
        case updateEvt:
            log(instance, "updateEvt");
            break;
        case diskEvt:
            log(instance, "diskEvt");
            break;
        case activateEvt:
            log(instance, "activateEvt");
            break;
        case osEvt:
            switch ((evt->message & 0xFF000000) >> 24) {
                case suspendResumeMessage:
                    log(instance, "osEvt - %s", (evt->message & 0x1) ? "resume" : "suspend");
                    break;
                case mouseMovedMessage:
                    log(instance, "osEvt - mouseMoved");
                    break;
                default:
                    log(instance, "osEvt - %08lX", evt->message);
            }
            break;
        case kHighLevelEvent:
            log(instance, "kHighLevelEvent");
            break;
        // NPAPI events
        case getFocusEvent:
            log(instance, "getFocusEvent");
            break;
        case loseFocusEvent:
            log(instance, "loseFocusEvent");
            break;
        case adjustCursorEvent:
            log(instance, "adjustCursorEvent");
            break;
        default:
            log(instance, "event %d", evt->what);
    }
#endif  // MAC_EVENT_CODE_DISABLED_DUE_TO_ERRORS

#endif

    return 0;
}

void NPP_URLNotify(NPP instance, const char *url, NPReason reason, void *notifyData)
{
    PluginObject* obj = static_cast<PluginObject*>(instance->pdata);
    if (obj->onURLNotify)
        executeScript(obj, obj->onURLNotify);

    handleCallback(obj, url, reason, notifyData);
}

NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value)
{
    NPError err = NPERR_NO_ERROR;

    switch (variable) {
#if defined(OS_LINUX)
        case NPPVpluginNameString:
            *((const char **)value) = "WebKit Test PlugIn";
            break;
        case NPPVpluginDescriptionString:
            *((const char **)value) = "Simple Netscape plug-in that handles test content for WebKit";
            break;
        case NPPVpluginNeedsXEmbed:
            *((NPBool *)value) = TRUE;
            break;
#endif
        case NPPVpluginScriptableNPObject: {
            void **v = (void **)value;
            PluginObject* obj = static_cast<PluginObject*>(instance->pdata);
            // Return value is expected to be retained
            browser->retainobject((NPObject *)obj);
            *v = obj;
            break;
        }
        default:
            fprintf(stderr, "Unhandled variable to NPP_GetValue\n");
            err = NPERR_GENERIC_ERROR;
            break;
    }

    return err;
}

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

#if defined(OS_LINUX)
NPError NP_GetValue(NPP instance, NPPVariable variable, void *value)
{
    return NPP_GetValue(instance, variable, value);
}

const char* NP_GetMIMEDescription(void) {
    // The layout test LayoutTests/fast/js/navigator-mimeTypes-length.html
    // asserts that the number of mimetypes handled by plugins should be
    // greater than the number of plugins.  This isn't true if we're
    // the only plugin and we only handle one mimetype, so specify
    // multiple mimetypes here.
    return "application/x-webkit-test-netscape:testnetscape:test netscape content;"
           "application/x-webkit-test-netscape2:testnetscape2:test netscape content2";
}
#endif