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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2014 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>

#include "toolkit.h"
#include "menu.h"
#include "toolbar.h"
#include "container.h"
#include "../ui/window.h"
#include "../common/context.h"

static int nwindows = 0;

static int window_default_width = 600;
static int window_default_height = 500;

static void window_close_handler(Widget window, void *udata, void *cdata) {
    UiObject *obj = udata;
    UiEvent ev;
    ev.window = obj->window;
    ev.document = obj->ctx->document;
    ev.obj = obj;
    ev.eventdata = NULL;
    ev.intval = 0;
    
    if(obj->ctx->close_callback) {
        obj->ctx->close_callback(&ev, obj->ctx->close_data);
    }
    // TODO: free UiObject
    
    nwindows--;
    if(nwindows == 0) {
        ui_exit_mainloop();
    }
}

static UiObject* create_window(char *title, void *window_data, UiBool simple) {
    UcxMempool *mp = ucx_mempool_new(256);
    UiObject *obj = ucx_mempool_calloc(mp, 1, sizeof(UiObject));
    obj->ctx = uic_context(obj, mp);
    obj->window = window_data;
    
    Arg args[16];
    int n = 0;
    
    XtSetArg(args[0], XmNtitle, title);
    //XtSetArg(args[1], XmNbaseWidth, window_default_width);
    //XtSetArg(args[2], XmNbaseHeight, window_default_height);
    XtSetArg(args[1], XmNminWidth, 100);
    XtSetArg(args[2], XmNminHeight, 50);
    XtSetArg(args[3], XmNwidth, window_default_width);
    XtSetArg(args[4], XmNheight, window_default_height);
    
    Widget toplevel = XtAppCreateShell(
            "Test123",
            "abc",
            //applicationShellWidgetClass,
            vendorShellWidgetClass,
            ui_get_display(),
            args,
            5);
    
    Atom wm_delete_window;
    wm_delete_window = XmInternAtom(
            XtDisplay(toplevel),
            "WM_DELETE_WINDOW",
            0);
    XmAddWMProtocolCallback(
            toplevel,
            wm_delete_window,
            window_close_handler,
            obj);
    
    // TODO: use callback
    ui_set_active_window(toplevel);
    
    Widget window = XtVaCreateManagedWidget(
            title,
            xmMainWindowWidgetClass,
            toplevel,
            NULL);
    obj->widget = window;
    Widget form = XtVaCreateManagedWidget(
            "window_form",
            xmFormWidgetClass,
            window,
            NULL);
    Widget toolbar = NULL;
    
    if(!simple) {
        ui_create_menubar(obj);
        toolbar = ui_create_toolbar(obj, form);
    }
    
    // window content
    XtSetArg(args[0], XmNshadowType, XmSHADOW_ETCHED_OUT);
    XtSetArg(args[1], XmNshadowThickness, 0);
    XtSetArg(args[2], XmNleftAttachment, XmATTACH_FORM);
    XtSetArg(args[3], XmNrightAttachment, XmATTACH_FORM);
    XtSetArg(args[4], XmNbottomAttachment, XmATTACH_FORM);
    if(toolbar) {
        XtSetArg(args[5], XmNtopAttachment, XmATTACH_WIDGET);
        XtSetArg(args[6], XmNtopWidget, toolbar);
        n = 7;
    } else {
        XtSetArg(args[5], XmNtopAttachment, XmATTACH_FORM);
        n = 6;
    }
    Widget frame = XmCreateFrame(form, "content_frame", args, n);
    XtManageChild(frame);
    
    Widget content_form = XmCreateForm(frame, "content_form", NULL, 0);
    XtManageChild(content_form);
    obj->container = ui_box_container(obj, content_form, 0, 0, UI_BOX_VERTICAL);
    
    XtManageChild(form);
      
    obj->widget = toplevel;
    nwindows++;
    return obj;
}

UiObject* ui_window(char *title, void *window_data) {
    return create_window(title, window_data, FALSE);
}

UiObject* ui_simplewindow(char *title, void *window_data) {
    return create_window(title, window_data, TRUE);
}

void ui_close(UiObject *obj) {
    XtDestroyWidget(obj->widget);
    window_close_handler(obj->widget, obj, NULL);
}

typedef struct FileDialogData {
    int  running;
    char *file;
} FileDialogData;

static void filedialog_select(
        Widget widget,
        FileDialogData *data,
        XmFileSelectionBoxCallbackStruct *selection)
{
    char *path = NULL;
    XmStringGetLtoR(selection->value, XmSTRING_DEFAULT_CHARSET, &path);
    data->running = 0;
    data->file = strdup(path);
    XtFree(path);
    XtUnmanageChild(widget);
}

static void filedialog_cancel(
        Widget widget,
        FileDialogData *data,
        XmFileSelectionBoxCallbackStruct *selection)

{
    data->running = 0;
    XtUnmanageChild(widget);
}

char* ui_openfiledialog(UiObject *obj) {
    Widget dialog = XmCreateFileSelectionDialog(obj->widget, "openfiledialog", NULL, 0);
    XtManageChild(dialog);
    
    FileDialogData data;
    data.running = 1;
    data.file = NULL;
    
    XtAddCallback(dialog, XmNokCallback, (XtCallbackProc)filedialog_select, &data);
    XtAddCallback(dialog, XmNcancelCallback, (XtCallbackProc)filedialog_cancel, &data);
    
    ui_secondary_event_loop(&data.running);
    return data.file;
}

char* ui_savefiledialog(UiObject *obj) {
    return ui_openfiledialog(obj);
}