/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2017 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 "button.h"
#include "container.h"
#include <ucx/mempool.h>
#include "../common/context.h"
#include "../common/object.h"

UIWIDGET ui_button(UiObject *obj, char *label, ui_callback f, void *data) {
    GtkWidget *button = gtk_button_new_with_label(label);
    
    if(f) {
        UiEventData *event = malloc(sizeof(UiEventData));
        event->obj = obj;
        event->userdata = data;
        event->callback = f;
        event->value = 0;

        g_signal_connect(
                button,
                "clicked",
                G_CALLBACK(ui_button_clicked),
                event);
        g_signal_connect(
                button,
                "destroy",
                G_CALLBACK(ui_destroy_userdata),
                event);
    }
    
    UiContainer *ct = uic_get_current_container(obj);
    ct->add(ct, button, FALSE);
    
    return button;
}


void ui_button_clicked(GtkWidget *widget, UiEventData *event) {
    UiEvent e;
    e.obj = event->obj;
    e.window = event->obj->window;
    e.document = event->obj->ctx->document;
    e.eventdata = NULL;
    e.intval = event->value;
    event->callback(&e, event->userdata);
}

int64_t ui_toggle_button_get(UiInteger *integer) {
    GtkToggleButton *button = integer->obj;
    integer->value = (int)gtk_toggle_button_get_active(button);
    return integer->value;
}

void ui_toggle_button_set(UiInteger *integer, int64_t value) {
    GtkToggleButton *button = integer->obj;
    integer->value = value;
    gtk_toggle_button_set_active(button, value != 0 ? TRUE : FALSE);
}

void ui_toggled_obs(GtkToggleToolButton *widget, UiVarEventData *event) {
    UiEvent e;
    e.obj = event->obj;
    e.window = event->obj->window;
    e.document = event->obj->ctx->document;
    e.eventdata = event->var->value;
    e.intval = gtk_toggle_tool_button_get_active(widget);
    
    UiInteger *i = event->var->value;
    ui_notify_evt(i->observers, &e);
}

UIWIDGET ui_checkbox_var(UiObject *obj, char *label, UiVar *var) {
    GtkWidget *button = gtk_check_button_new_with_label(label);
    
    // bind value
    if(var) {
        UiInteger *value = var->value;
        value->obj = GTK_TOGGLE_BUTTON(button);
        value->get = ui_toggle_button_get;
        value->set = ui_toggle_button_set;
        gtk_toggle_button_set_active(value->obj, value->value);
        
        UiVarEventData *event = malloc(sizeof(UiVarEventData));
        event->obj = obj;
        event->var = var;
        event->observers = NULL;

        g_signal_connect(
                button,
                "clicked",
                G_CALLBACK(ui_toggled_obs),
                event);
        g_signal_connect(
                button,
                "destroy",
                G_CALLBACK(ui_destroy_vardata),
                event);
    }
    
    UiContainer *ct = uic_get_current_container(obj);
    ct->add(ct, button, FALSE);
    
    return button;
}

UIWIDGET ui_checkbox(UiObject *obj, char *label, UiInteger *value) {
    UiVar *var = NULL;
    if(value) {
        var = malloc(sizeof(UiVar));
        var->value = value;
        var->type = UI_VAR_SPECIAL;
    }
    return ui_checkbox_var(obj, label, var);
}

UIWIDGET ui_checkbox_nv(UiObject *obj, char *label, char *varname) {
    UiVar *var = uic_create_var(obj->ctx, varname, UI_VAR_INTEGER);
    return ui_checkbox_var(obj, label, var);
}


UIWIDGET ui_radiobutton_var(UiObject *obj, char *label, UiVar *var) {
    GSList *rg = NULL;
    UiInteger *rgroup;
    
    if(var) {
        rgroup = var->value;
        rg = rgroup->obj;
    }
    
    GtkWidget *rbutton = gtk_radio_button_new_with_label(rg, label);
    rg = gtk_radio_button_get_group(GTK_RADIO_BUTTON(rbutton));
    
    if(rgroup) {
        rgroup->obj = rg;
        rgroup->get = ui_radiobutton_get;
        rgroup->set = ui_radiobutton_set;
        
        ui_radiobutton_set(rgroup, rgroup->value);
        
        UiVarEventData *event = malloc(sizeof(UiVarEventData));
        event->obj = obj;
        event->var = var;
        event->observers = NULL;
        
        g_signal_connect(
                rbutton,
                "clicked",
                G_CALLBACK(ui_radio_obs),
                event);
        g_signal_connect(
                rbutton,
                "destroy",
                G_CALLBACK(ui_destroy_vardata),
                event);
    }
    
    UiContainer *ct = uic_get_current_container(obj);
    ct->add(ct, rbutton, FALSE);
    
    return rbutton;
}

UIWIDGET ui_radiobutton(UiObject *obj, char *label, UiInteger *rgroup) {
    UiVar *var = NULL;
    if(rgroup) {
        var = malloc(sizeof(UiVar));
        var->value = rgroup;
        var->type = UI_VAR_SPECIAL;
    }
    return ui_radiobutton_var(obj, label, var);
}

UIWIDGET ui_radiobutton_nv(UiObject *obj, char *label, char *varname) {
    UiVar *var = uic_create_var(obj->ctx, varname, UI_VAR_INTEGER);
    return ui_radiobutton_var(obj, label, var);
}

void ui_radio_obs(GtkToggleToolButton *widget, UiVarEventData *event) {
    UiInteger *i = event->var->value;
    
    UiEvent e;
    e.obj = event->obj;
    e.window = event->obj->window;
    e.document = event->obj->ctx->document;
    e.eventdata = NULL;
    e.intval = i->get(i);
    
    ui_notify_evt(i->observers, &e);
}

int64_t ui_radiobutton_get(UiInteger *value) {
    int selection = 0;
    GSList *ls = value->obj;
    int i = 0;
    guint len = g_slist_length(ls);
    while(ls) {
        if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(ls->data))) {
            selection = len - i - 1;
            break;
        }
        ls = ls->next;
        i++;
    }
    
    value->value = selection;
    return selection;
}

void ui_radiobutton_set(UiInteger *value, int64_t i) {
    GSList *ls = value->obj;
    int s = g_slist_length(ls) - 1 - i;
    int j = 0;
    while(ls) {
        if(j == s) {
            gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ls->data), TRUE);
            break;
        }
        ls = ls->next;
        j++;
    }
    
    value->value = i;
}