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/*
 * 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 <string.h>

#include "toolbar.h"
#include "button.h"
#include "image.h"
#include "tree.h"
#include <cx/mempool.h>
#include <cx/hash_map.h>
#include <cx/linked_list.h>
#include <cx/array_list.h>
#include "../common/context.h"

static CxMap *toolbar_items;
static CxList *defaults;

void ui_toolbar_init() {
    toolbar_items = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16);
    defaults = cxLinkedListCreateSimple(CX_STORE_POINTERS);
}

void ui_toolitem(char *name, char *label, ui_callback f, void *udata) {
    ui_toolitem_img(name, label, NULL, f, udata);
}

void ui_toolitem_st(char *name, char *stockid, ui_callback f, void *userdata) {
    ui_toolitem_stgr(name, stockid, f, userdata, -1);
}

void ui_toolitem_sti(char *name, char *stockid, ui_callback f, void *userdata) {
    ui_toolitem_stgri(name, stockid, f, userdata, -1);
}

void ui_toolitem_stgr(char *name, char *stockid, ui_callback f, void *userdata, ...) {
    va_list ap;
    va_start(ap, userdata);
    ui_toolitem_vstgr(name, stockid, 0, f, userdata, ap);
    va_end(ap);
}

void ui_toolitem_stgri(char *name, char *stockid, ui_callback f, void *userdata, ...) {
    va_list ap;
    va_start(ap, userdata);
    ui_toolitem_vstgr(name, stockid, 1, f, userdata, ap);
    va_end(ap);
}

void ui_toolitem_img(char *name, char *label, char *img, ui_callback f, void *udata) {
    UiToolItem *item = malloc(sizeof(UiToolItem));
    item->item.add_to = (ui_toolbar_add_f)add_toolitem_widget;
    item->label = label;
    item->image = img;
    item->callback = f;
    item->userdata = udata;
    item->isimportant = 0;
    item->groups = NULL;
    
    cxMapPut(toolbar_items, name, item);
}

void ui_toolitem_vstgr(
        char *name,
        char *stockid,
        int isimportant,
        ui_callback f,
        void *userdata,
        va_list ap)
{
    UiStToolItem *item = malloc(sizeof(UiStToolItem));
    item->item.add_to = (ui_toolbar_add_f)add_toolitem_st_widget;
    item->stockid = stockid;
    item->callback = f;
    item->userdata = userdata;
    item->groups = NULL;
    item->isimportant = isimportant;
    
    // add groups
    int group;
    while((group = va_arg(ap, int)) != -1) {
        if(!item->groups) {
            item->groups = cxArrayListCreateSimple(sizeof(int), 16);
        }
        cxListAdd(item->groups, &group);
    }
    
    cxMapPut(toolbar_items, name, item);
}

void ui_toolitem_toggle(const char *name, const char *label, const char *img, UiInteger *i) {
    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
    item->label = label;
    item->image = img;
    item->stockid = NULL;
    item->groups = NULL;
    item->isimportant = 0;
    item->value = i;
    item->var = NULL;
    
    cxMapPut(toolbar_items, name, item);
}

void ui_toolitem_toggle_st(const char *name, const char *stockid, UiInteger *i) {
    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
    item->label = NULL;
    item->image = NULL;
    item->stockid = stockid;
    item->groups = NULL;
    item->isimportant = 0;
    item->value = i;
    item->var = NULL;
    
    cxMapPut(toolbar_items, name, item);
}

void ui_toolitem_toggle_nv(const char *name, const char *label, const char *img, const char *intvar) {
    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
    item->label = label;
    item->image = img;
    item->stockid = NULL;
    item->groups = NULL;
    item->isimportant = 0;
    item->value = NULL;
    item->var = intvar;
    
    cxMapPut(toolbar_items, name, item);
}

void ui_toolitem_toggle_stnv(const char *name, const char *stockid, const char *intvar) {
    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
    item->label = NULL;
    item->image = NULL;
    item->stockid = stockid;
    item->groups = NULL;
    item->isimportant = 0;
    item->value = NULL;
    item->var = intvar;
    
    cxMapPut(toolbar_items, name, item);
}


void ui_toolbar_combobox(
        char *name,
        UiList *list,
        ui_getvaluefunc getvalue,
        ui_callback f,
        void *udata)
{
    UiToolbarComboBox *cb = malloc(sizeof(UiToolbarComboBox));
    cb->item.add_to = (ui_toolbar_add_f)add_toolbar_combobox;
    UiVar *var = malloc(sizeof(UiVar));
    var->value = list;
    var->type = UI_VAR_SPECIAL;
    var->from = NULL;
    var->from_ctx = NULL;
    cb->var = var;
    cb->getvalue = getvalue;
    cb->callback = f;
    cb->userdata = udata;
    
    cxMapPut(toolbar_items, name, cb);
}

void ui_toolbar_combobox_str(
        char *name,
        UiList *list,
        ui_callback f,
        void *udata)
{
    ui_toolbar_combobox(name, list, ui_strmodel_getvalue, f, udata);
}

void ui_toolbar_combobox_nv(
        char *name,
        char *listname,
        ui_getvaluefunc getvalue,
        ui_callback f,
        void *udata)
{
    UiToolbarComboBoxNV *cb = malloc(sizeof(UiToolbarComboBoxNV));
    cb->item.add_to = (ui_toolbar_add_f)add_toolbar_combobox_nv;  
    cb->listname = listname;
    cb->getvalue = getvalue;
    cb->callback = f;
    cb->userdata = udata;
    
    cxMapPut(toolbar_items, name, cb);
}


GtkWidget* ui_create_toolbar(UiObject *obj) {
    if(!defaults) {
        return NULL;
    }
    
    GtkWidget *toolbar = gtk_toolbar_new();
#ifdef UI_GTK3
    gtk_style_context_add_class(
            gtk_widget_get_style_context(toolbar),
            GTK_STYLE_CLASS_PRIMARY_TOOLBAR);
#endif
    
    GtkToolbar *tb = GTK_TOOLBAR(toolbar);
    CxIterator i = cxListIterator(defaults);
    cx_foreach(char *, def, i) {
        UiToolItemI *item = cxMapGet(toolbar_items, def);
        if(item) {
            item->add_to(tb, item, obj);
        } else if(!strcmp(def, "@separator")) {
            gtk_toolbar_insert(tb, gtk_separator_tool_item_new(), -1);
        } else {
            fprintf(stderr, "UI Error: Unknown toolbar item: %s\n", def);
        }
    }
    
    return toolbar;
}

void add_toolitem_widget(GtkToolbar *tb, UiToolItem *item, UiObject *obj) {
    GtkToolItem *button = gtk_tool_button_new(NULL, item->label);
    gtk_tool_item_set_homogeneous(button, FALSE);
    if(item->image) {
        GdkPixbuf *pixbuf = ui_get_image(item->image);
        GtkWidget *image = gtk_image_new_from_pixbuf(pixbuf);
        gtk_tool_button_set_icon_widget(GTK_TOOL_BUTTON(button), image);
    } else {
        gtk_tool_item_set_is_important(button, TRUE);
    }
    
    if(item->callback) {
        UiEventData *event = cxMalloc(
                obj->ctx->allocator,
                sizeof(UiEventData));
        event->obj = obj;
        event->userdata = item->userdata;
        event->callback = item->callback;
        
        g_signal_connect(
                button,
                "clicked",
                G_CALLBACK(ui_button_clicked),
                event);
    }
    
    gtk_toolbar_insert(tb, button, -1);
    
    if(item->groups) {
        uic_add_group_widget(obj->ctx, button, (ui_enablefunc)ui_set_enabled, item->groups);
    }
}

void add_toolitem_st_widget(GtkToolbar *tb, UiStToolItem *item, UiObject *obj) {
    GtkToolItem *button = gtk_tool_button_new_from_stock(item->stockid);
    gtk_tool_item_set_homogeneous(button, FALSE);
    if(item->isimportant) {
        gtk_tool_item_set_is_important(button, TRUE);
    }
    
    if(item->callback) {
        UiEventData *event = cxMalloc(
                obj->ctx->allocator,
                sizeof(UiEventData));
        event->obj = obj;
        event->userdata = item->userdata;
        event->callback = item->callback;
        
        g_signal_connect(
                button,
                "clicked",
                G_CALLBACK(ui_button_clicked),
                event);
    }
    
    gtk_toolbar_insert(tb, button, -1);
    
    if(item->groups) {
        uic_add_group_widget(obj->ctx, button, (ui_enablefunc)ui_set_enabled, item->groups);
    }
}

void add_toolitem_toggle_widget(GtkToolbar *tb, UiToggleToolItem *item, UiObject *obj) {
    GtkToolItem *button;
    if(item->stockid) {
        button = gtk_toggle_tool_button_new_from_stock(item->stockid);
    } else {
        button = gtk_toggle_tool_button_new();
        gtk_tool_item_set_homogeneous(button, FALSE);
        if(item->label) {
            gtk_tool_button_set_label(GTK_TOOL_BUTTON(button), item->label);
        }
        if(item->image) {
            GdkPixbuf *pixbuf = ui_get_image(item->image);
            GtkWidget *image = gtk_image_new_from_pixbuf(pixbuf);
            gtk_tool_button_set_icon_widget(GTK_TOOL_BUTTON(button), image);
        }    
    }
    
    UiVar *var;
    if(item->value) {
        var = malloc(sizeof(UiVar));
        var->value = item->value;
        var->type = UI_VAR_SPECIAL;
        var->from = NULL;
        var->from_ctx = NULL;
    } else {
        var = uic_create_var(obj->ctx, item->var, UI_VAR_INTEGER);
    }
    
    if(var->value) {
        UiInteger *i = var->value;
        i->get = ui_tool_toggle_button_get;
        i->set = ui_tool_toggle_button_set;
        i->obj = button;
        
        if(i->value != 0) {
            gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(button), TRUE);
        }
    }
    
    // register event
    // the event func will call the UiInteger observer callbacks
    UiEventData *event = cxMalloc(
            obj->ctx->allocator,
            sizeof(UiEventData));
    event->obj = obj;
    event->userdata = var;
    event->callback = NULL;

    g_signal_connect(
            button,
            "toggled",
            G_CALLBACK(ui_tool_button_toggled),
            event);
    
    // add item to toolbar
    gtk_toolbar_insert(tb, button, -1);
    
    if(item->groups) {
        uic_add_group_widget(obj->ctx, button, (ui_enablefunc)ui_set_enabled, item->groups);
    }
}

void ui_tool_button_toggled(GtkToggleToolButton *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 = gtk_toggle_tool_button_get_active(widget);
    
    UiVar *var = event->userdata;
    UiInteger *i = var->value;
    
    ui_notify_evt(i->observers, &e);
}

int64_t ui_tool_toggle_button_get(UiInteger *integer) {
    integer->value = gtk_toggle_tool_button_get_active(GTK_TOGGLE_TOOL_BUTTON(integer->obj));
    return integer->value;
}

void ui_tool_toggle_button_set(UiInteger *integer, int64_t value) {
    gboolean s = value != 0 ? TRUE : FALSE;
    gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(integer->obj), s);
    integer->value = s;
}

void add_toolbar_combobox(GtkToolbar *tb, UiToolbarComboBox *cb, UiObject *obj) {
    UiModel *modelinfo = ui_model(obj->ctx, UI_STRING, "", -1);
    modelinfo->getvalue = cb->getvalue;
    UiListModel *model = ui_list_model_new(obj, cb->var, modelinfo);
    
    GtkWidget *combobox = ui_create_combobox(obj, model, cb->callback, cb->userdata);
    GtkToolItem *item = gtk_tool_item_new();
    gtk_container_add(GTK_CONTAINER(item), combobox);
    gtk_toolbar_insert(tb, item, -1);
}

void add_toolbar_combobox_nv(GtkToolbar *tb, UiToolbarComboBoxNV *cb, UiObject *obj) {
    UiVar *var = uic_create_var(obj->ctx, cb->listname, UI_VAR_LIST);
    if(var) {
        UiModel *modelinfo = ui_model(obj->ctx, UI_STRING, "", -1);
        modelinfo->getvalue = cb->getvalue;
        UiListModel *model = ui_list_model_new(obj, var, modelinfo);
        
        GtkWidget *combobox = ui_create_combobox(obj, model, cb->callback, cb->userdata);
        GtkToolItem *item = gtk_tool_item_new();
        gtk_container_add(GTK_CONTAINER(item), combobox);
        gtk_toolbar_insert(tb, item, -1);
    }
}