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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2024 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 <inttypes.h>

#include "container.h"
#include "../common/context.h"
#include "../common/object.h"

#include "Grid.h"

/* ---------------------------- Box Container ---------------------------- */

static UIWIDGET box_create(UiObject *obj, UiContainerArgs args, UiBoxOrientation orientation) { 
    UiContainerPrivate *ctn = ui_obj_container(obj);
    UI_APPLY_LAYOUT(ctn->layout, args);
    
    Arg xargs[16];
    int n = 0;
    
    if(orientation == UI_BOX_VERTICAL) {
        //XtSetArg(xargs[n], gridRowSpacing, args.spacing); n++;
    } else {
        //XtSetArg(xargs[n], gridColumnSpacing, args.spacing); n++;
    }
    
    Widget parent = ctn->prepare(ctn, xargs, &n);
    Widget grid = XtCreateManagedWidget(args.name ? args.name : "boxcontainer", gridClass, parent, xargs, n);
    ctn->add(ctn, grid);
    
    UiContainerX *container = ui_box_container(obj, grid, orientation);
    uic_object_push_container(obj, container);
    
    return grid;
}

// public
UIWIDGET ui_vbox_create(UiObject *obj, UiContainerArgs args) {
    return box_create(obj, args, UI_BOX_VERTICAL);
}

// public
UIWIDGET ui_hbox_create(UiObject *obj, UiContainerArgs args) {
    return box_create(obj, args, UI_BOX_HORIZONTAL);
}

UiContainerX* ui_box_container(UiObject *obj, Widget grid, UiBoxOrientation orientation) {
    UiBoxContainer *ctn = ui_malloc(obj->ctx, sizeof(UiBoxContainer));
    memset(ctn, 0, sizeof(UiBoxContainer));
    ctn->container.prepare = orientation == UI_BOX_VERTICAL ? ui_vbox_prepare : ui_hbox_prepare;
    ctn->container.add = ui_box_container_add;
    ctn->container.widget = grid;
    ctn->n = 0;
    return (UiContainerX*)ctn;
}

static Widget ui_box_container_prepare(UiBoxContainer *box, Arg *args, int *n) {
    int a = *n;
    box->n++;
    return box->container.widget;
}

Widget ui_vbox_prepare(UiContainerPrivate *ctn, Arg *args, int *n) {
    UiBoxContainer *box = (UiBoxContainer*)ctn;
    int a = *n;
    XtSetArg(args[a], gridRow, box->n); a++;
    if(box->container.layout.fill == UI_ON) {
        XtSetArg(args[a], gridVExpand, TRUE); a++;
        XtSetArg(args[a], gridVFill, TRUE); a++;
    }
    XtSetArg(args[a], gridHExpand, TRUE); a++;
    XtSetArg(args[a], gridHFill, TRUE); a++;
    *n = a;
    return ui_box_container_prepare(box, args, n);
}

Widget ui_hbox_prepare(UiContainerPrivate *ctn, Arg *args, int *n) {
    UiBoxContainer *box = (UiBoxContainer*)ctn;
    int a = *n;
    XtSetArg(args[a], gridColumn, box->n); a++;
    if(box->container.layout.fill == UI_ON) {
        XtSetArg(args[a], gridHExpand, TRUE); a++;
        XtSetArg(args[a], gridHFill, TRUE); a++;
    }
    XtSetArg(args[a], gridVExpand, TRUE); a++;
    XtSetArg(args[a], gridVFill, TRUE); a++;
    *n = a;
    return ui_box_container_prepare(box, args, n);
}

void ui_box_container_add(UiContainerPrivate *ctn, Widget widget) {
    ui_reset_layout(ctn->layout);
    
}


/* ---------------------------- Grid Container ---------------------------- */

// public
UIWIDGET ui_grid_create(UiObject *obj, UiContainerArgs args) {
    Arg xargs[16];
    int n = 0;
    
    XtSetArg(xargs[n], XmNbackground, 0); n++;
    
    UiContainerPrivate *ctn = ui_obj_container(obj);
    UI_APPLY_LAYOUT(ctn->layout, args);
    
    Widget parent = ctn->prepare(ctn, xargs, &n);
    Widget grid = XtCreateManagedWidget(args.name ? args.name : "gridcontainer", gridClass, parent, xargs, n);
    ctn->add(ctn, grid);
    
    UiContainerX *container = ui_grid_container(obj, grid);
    uic_object_push_container(obj, container);
    
    return grid;
}

UiContainerX* ui_grid_container(UiObject *obj, Widget grid) {
    UiGridContainer *ctn = ui_malloc(obj->ctx, sizeof(UiGridContainer));
    memset(ctn, 0, sizeof(UiBoxContainer));
    ctn->container.prepare = ui_grid_container_prepare;
    ctn->container.add = ui_grid_container_add;
    ctn->container.widget = grid;
    ctn->x = 0;
    ctn->y = 0;
    return (UiContainerX*)ctn;
}

Widget ui_grid_container_prepare(UiContainerPrivate *ctn, Arg *args, int *n) {
    UiGridContainer *grid = (UiGridContainer*)ctn;
    if(ctn->layout.newline) {
        grid->y++;
        grid->x = 0;
    }
    
    int a = *n;
    XtSetArg(args[a], gridColumn, grid->x); a++;
    XtSetArg(args[a], gridRow, grid->y); a++;
    if(ctn->layout.colspan > 0) {
        XtSetArg(args[a], gridColspan, ctn->layout.colspan); a++;
    }
    if(ctn->layout.rowspan > 0) {
        XtSetArg(args[a], gridRowspan, ctn->layout.rowspan); a++;
    }
    
    if(grid->container.layout.fill == UI_ON) {
        grid->container.layout.hfill = TRUE;
        grid->container.layout.vfill = TRUE;
        grid->container.layout.hexpand = TRUE;
        grid->container.layout.vexpand = TRUE;
    }
    
    if(grid->container.layout.hfill) {
        XtSetArg(args[a], gridHFill, TRUE); a++;
    }
    if(grid->container.layout.vfill) {
        XtSetArg(args[a], gridVFill, TRUE); a++;
    }
    if(grid->container.layout.hexpand) {
        XtSetArg(args[a], gridHExpand, TRUE); a++;
    }
    if(grid->container.layout.vexpand) {
        XtSetArg(args[a], gridVExpand, TRUE); a++;
    }
    
    *n = a;
    return ctn->widget;
}

void ui_grid_container_add(UiContainerPrivate *ctn, Widget widget) {
    UiGridContainer *grid = (UiGridContainer*)ctn;
    grid->x++;
    ui_reset_layout(ctn->layout);
}


/* -------------------- Container Helper Functions -------------------- */

void ui_container_begin_close(UiObject *obj) {
    UiContainerPrivate *ct = ui_obj_container(obj);
    ct->container.close = 1;
}

int ui_container_finish(UiObject *obj) {
    UiContainerPrivate *ct = ui_obj_container(obj);
    if(ct->container.close) {
        ui_end_new(obj);
        return 0;
    }
    return 1;
}


/*
 * -------------------- Layout Functions --------------------
 * 
 * functions for setting layout attributes for the current container
 *
 */

void ui_newline(UiObject *obj) {
    UiContainerPrivate *ct = ui_obj_container(obj);
    ct->layout.newline = TRUE;
}