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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 <stdbool.h>

#include "toolkit.h"
#include "toolbar.h"
#include "model.h"
#include "image.h"
#include "../common/document.h"
#include "../common/properties.h"

#include <ucx/utils.h>

#include <pthread.h>

#ifndef UI_GTK2
static GtkApplication *app;
#endif

static char *application_name;

static ui_callback   startup_func;
static void          *startup_data;
static ui_callback   open_func;
void                 *open_data;
static ui_callback   exit_func;
void                 *exit_data;

static ui_callback   appclose_fnc;
static void          *appclose_udata;

static UiObject      *active_window;

static int scale_factor = 1;

void ui_init(char *appname, int argc, char **argv) {
    uic_init_global_context();
    
    gtk_init(&argc, &argv);
    application_name = appname;
    
    uic_docmgr_init();
    ui_toolbar_init();
    
    // init custom types
    ui_list_init();
    
    ui_image_init();
    
    uic_load_app_properties();
    
#ifdef UI_SUPPORTS_SCALE
    scale_factor = gdk_monitor_get_scale_factor(
            gdk_display_get_primary_monitor(gdk_display_get_default()));
#endif
}

char* ui_appname() {
    return application_name;
}

void ui_onstartup(ui_callback f, void *userdata) {
    startup_func = f;
    startup_data = userdata;
}

void ui_onopen(ui_callback f, void *userdata) {
    open_func = f;
    open_data = userdata;
}

void ui_onexit(ui_callback f, void *userdata) {
    exit_func = f;
    exit_data = userdata;
}


#ifndef UI_GTK2
static void app_startup(GtkApplication* app, gpointer userdata) {
    if(startup_func) {
        startup_func(NULL, startup_data);
    }
}

static void app_activate(GtkApplication* app, gpointer userdata) {
    printf("activate\n");
}
#endif

void ui_main() {
#ifndef UI_GTK2
    sstr_t appid = ucx_sprintf(
            "ui.%s",
            application_name ? application_name : "application1");
    
    app = gtk_application_new(
            appid.ptr,
            G_APPLICATION_FLAGS_NONE);
    g_signal_connect (app, "startup", G_CALLBACK (app_startup), NULL);
    g_signal_connect (app, "activate", G_CALLBACK (app_activate), NULL);
    g_application_run(G_APPLICATION (app), 0, NULL);
    g_object_unref (app);
    
    free(appid.ptr);
#else
    if(startup_func) {
        startup_func(NULL, startup_data);
    }
    gtk_main();
#endif
    if(exit_func) {
        exit_func(NULL, exit_data);
    }
    uic_store_app_properties();
}

#ifndef UI_GTK2
void ui_app_quit() {
    g_application_quit(G_APPLICATION(app));
}

GtkApplication* ui_get_application() {
    return app;
}
#endif

void ui_show(UiObject *obj) {
    uic_check_group_widgets(obj->ctx);
    gtk_widget_show_all(obj->widget);
}

void ui_close(UiObject *obj) {
    gtk_widget_destroy(obj->widget);
}


static gboolean ui_job_finished(void *data) {
    UiJob *job = data;
    
    UiEvent event;
    event.obj = job->obj;
    event.window = job->obj->window;
    event.document = job->obj->ctx->document;
    event.intval = 0;
    event.eventdata = NULL;

    job->finish_callback(&event, job->finish_data);
    free(job);
    return FALSE;
}

static void* ui_jobthread(void *data) {
    UiJob *job = data;
    int result = job->job_func(job->job_data);
    if(!result) {
        g_idle_add(ui_job_finished, job);
    }
    return NULL;
}

void ui_job(UiObject *obj, ui_threadfunc tf, void *td, ui_callback f, void *fd) {
    UiJob *job = malloc(sizeof(UiJob));
    job->obj = obj;
    job->job_func = tf;
    job->job_data = td;
    job->finish_callback = f;
    job->finish_data = fd;
    pthread_t pid;
    pthread_create(&pid, NULL, ui_jobthread, job);
}

void ui_set_enabled(UIWIDGET widget, int enabled) {
    gtk_widget_set_sensitive(widget, enabled);
}

void ui_set_show_all(UIWIDGET widget, int value) {
    gtk_widget_set_no_show_all(widget, !value);
}

void ui_set_visible(UIWIDGET widget, int visible) {
    if(visible) {
        gtk_widget_set_no_show_all(widget, FALSE);
        gtk_widget_show_all(widget);
    } else {
        gtk_widget_hide(widget);
    }
}

void ui_clipboard_set(char *str) {
    GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
    gtk_clipboard_set_text(cb, str, strlen(str));
}

char* ui_clipboard_get() {
    GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
    char *str = gtk_clipboard_wait_for_text(cb);
    if(str) {
        char *copy = strdup(str);
        g_free(str);
        return copy;
    } else {
        return NULL;
    }
}

int ui_get_scalefactor() {
    return scale_factor;
}

void ui_destroy_userdata(GtkWidget *object, void *userdata) {
    free(userdata);
}

void ui_destroy_vardata(GtkWidget *object, UiVarEventData *data) {
    ui_destroy_boundvar(data->obj->ctx, data->var);
    free(data);
}

void ui_destroy_boundvar(UiContext *ctx, UiVar *var) {
    if(var->type == UI_VAR_SPECIAL) {
        free(var);
    } else {
        uic_remove_bound_var(ctx, var);
    }
}

void ui_set_active_window(UiObject *obj) {
    active_window = obj;
}

UiObject *ui_get_active_window() {
    return active_window;
}