#include <gtk/gtksignal.h>

#include <gdk/gdkevents.h>

#include <gdk/gdkkeysyms.h>

#include "mmyth_uicommon.h"

#include "mmyth_epg_grid_widget.h"

#include "gmyth_util.h" 

#include "gmyth_epg.h"

#define PIXELS_HOUR 105

#define PROGRAM_SEPARATION 2

enum {

  SELECTION_UPDATED_SIGNAL,

  LAST_SIGNAL

};

struct _MMythEpgGridWidgetPrivate {

    /* private widget components */

    GtkWidget *epg_channels_vbox;

    GtkWidget *epg_programs_vbox;

    GHashTable *service_model_hash;

    /* guidegrid attributes */

    gboolean show_favorites;

    gint current_start_channel_id;

    time_t current_start_time;

    time_t current_end_time;

    guint selected_channel_index;

    /* GList of ProgramInfo for each Channel */

    GList * program_list[MAX_DISPLAY_CHANS];

    GList * channel_list;

    GMythEPG *mmyth_epg;

    GMythBackendInfo *backend_info;

    gint DISPLAY_CHANS;

};

static void mmyth_epg_grid_widget_class_init          (MMythEpgGridWidgetClass *klass);

static void mmyth_epg_grid_widget_init                (MMythEpgGridWidget *object);

static void mmyth_epg_grid_widget_private_init        (MMythEpgGridWidgetPrivate *private);

static void mmyth_epg_grid_widget_mount_services      (MMythEpgGridWidget *object, 

                                                       int start_time, int end_time);

static void mmyth_epg_grid_widget_mount_header        (MMythEpgGridWidget *object);

static void mmyth_epg_grid_widget_clicked             (GtkWidget* widget, 

                                                       GdkEventExpose *event, 

                                                       gpointer data);

static GtkWidget *create_event_box_lbl                (gchar *str, int width, 

                                                       const GdkColor *bg_color, 

                                                       const GdkColor *fg_color);

static void mmyth_epg_grid_widget_fill_programinfos(MMythEpgGridWidgetPrivate *private);

static void mmyth_epg_grid_widget_fill_program_row_infos(

                    MMythEpgGridWidgetPrivate *private, 

                    unsigned int chanNum, unsigned int row);

static gint mmyth_epg_grid_widget_signals[LAST_SIGNAL] = { 0 };

G_DEFINE_TYPE(MMythEpgGridWidget, mmyth_epg_grid_widget, GTK_TYPE_EVENT_BOX)

static void

mmyth_epg_grid_widget_class_init (MMythEpgGridWidgetClass *klass)

{

  g_type_class_add_private (klass, sizeof (MMythEpgGridWidgetPrivate));

  mmyth_epg_grid_widget_signals[SELECTION_UPDATED_SIGNAL] = g_signal_new (

                     "selection_updated",

					 G_TYPE_FROM_CLASS(klass), 

					 G_SIGNAL_RUN_FIRST,

					 0,

                     NULL,

                     NULL,

					 g_cclosure_marshal_VOID__POINTER, 

                     G_TYPE_NONE, 

                     1,

                     G_TYPE_POINTER);

}

static void 

mmyth_epg_grid_widget_private_init (MMythEpgGridWidgetPrivate *private)

{

    time_t cur_time;

    g_return_if_fail(private != NULL);     

    private->epg_channels_vbox   = NULL;

    private->epg_programs_vbox   = NULL;

    private->service_model_hash  = NULL;

    private->show_favorites = FALSE;

    private->current_start_channel_id = -1;

    /* Selected the first diplayable channel initially */

    private->selected_channel_index = 0;

    /* TODO fix the current start/end time */

    private->current_start_time = time(&cur_time);

    private->current_end_time = time(&cur_time) + 10800;   

    private->DISPLAY_CHANS = MAX_DISPLAY_CHANS;

    private->backend_info = gmyth_backend_info_new_full ( "192.168.1.109", "mythtv",

    	"mythtv", "mythconverg", 6543 );

    // TODO: Close the epg and unref it in dispose call

    private->mmyth_epg = gmyth_epg_new ();

    if (!gmyth_epg_connect (private->mmyth_epg, private->backend_info)) {

    	g_warning ("[%s] Could not connect mysql handler to db", __FUNCTION__);

    	g_object_unref (private->mmyth_epg);

    	private->mmyth_epg = NULL;

    }

}

static void

mmyth_epg_grid_widget_init (MMythEpgGridWidget *mmyth_epg_grid_widget)

{

    MMythEpgGridWidgetPrivate *private = 

        MMYTH_EPG_GRID_WIDGET_GET_PRIVATE(mmyth_epg_grid_widget);

    /* init private fields */

    mmyth_epg_grid_widget_private_init(private);

    mmyth_epg_grid_widget->epg_view_model      = NULL;

    mmyth_epg_grid_widget->selected_grid_item  = NULL;

    GtkWidget *epg_event_box = GTK_WIDGET(mmyth_epg_grid_widget);

    gtk_widget_modify_bg(epg_event_box, GTK_STATE_NORMAL, &main_bg_color);

    gtk_widget_set_size_request (epg_event_box, 0, 125);

    GtkWidget *epg_main_hbox = gtk_hbox_new (FALSE, 10);

    gtk_container_set_border_width(GTK_CONTAINER (epg_main_hbox), 10);

    gtk_container_add (GTK_CONTAINER (epg_event_box),

                       epg_main_hbox);

    /* channels vbox */

    GtkWidget *epg_channels_vbox = gtk_vbox_new (FALSE, 3); 

    private->epg_channels_vbox = epg_channels_vbox; 

    /* programs vbox */

    GtkWidget *epg_programs_vbox = gtk_vbox_new (FALSE, 3);

    private->epg_programs_vbox = epg_programs_vbox;

    /* packing start */

    gtk_box_pack_start (GTK_BOX (epg_main_hbox),

	                epg_channels_vbox, FALSE, FALSE, 0);

    gtk_box_pack_start (GTK_BOX (epg_main_hbox),

                        epg_programs_vbox, FALSE, FALSE, 0);

    /* table header (first line) */  

    mmyth_epg_grid_widget_mount_header(mmyth_epg_grid_widget);                 

    /* service programs */ 

    /* mount service programs with current time */

    mmyth_epg_grid_widget_mount_services(mmyth_epg_grid_widget, 

                                         private->current_start_time,

                                         private->current_end_time);                                           

}

GtkWidget*

mmyth_epg_grid_widget_new ()

{

  return GTK_WIDGET ( gtk_type_new (mmyth_epg_grid_widget_get_type ()));

}

static void

mmyth_epg_grid_widget_mount_services(MMythEpgGridWidget *mmyth_epg_grid_widget, 

                                     int start_time, int end_time)

{

    GList *proglist;

    GList *channel_list = NULL;

    GMythChannelInfo *channel_info;

    int chanid;

    MMythEpgGridWidgetPrivate *private = 

        MMYTH_EPG_GRID_WIDGET_GET_PRIVATE(mmyth_epg_grid_widget);

	// update view_model

	/* FIXME shallow free or recursive? */

	if(mmyth_epg_grid_widget->epg_view_model != NULL) {

		g_list_free(mmyth_epg_grid_widget->epg_view_model);

		mmyth_epg_grid_widget->epg_view_model = NULL;

	}

	if(private->service_model_hash != NULL) {

		g_hash_table_destroy(private->service_model_hash);

	}

	private->service_model_hash = g_hash_table_new(NULL, NULL);

    /* fill program infos from db */

    mmyth_epg_grid_widget_fill_programinfos(private);

    channel_list = private->channel_list;

    /* for each channel get_programs() */

    for (chanid=0; channel_list &&

                   chanid < private->DISPLAY_CHANS; chanid++) {

        proglist = (GList *) private->program_list[chanid];        

        channel_info = (GMythChannelInfo *) channel_list->data;

        channel_list = g_list_next(channel_list);        

        /* Service Title*/

        GString *name = NULL;

        if (channel_info->channel_name)

        	name = g_string_new (channel_info->channel_name->str);

		GdkColor title_bg_color;

		title_bg_color.red = 5000;

		title_bg_color.green = 9000;

		title_bg_color.blue = 40000;        

		GdkColor title_fg_color;

		title_fg_color.red = 60000;

		title_fg_color.green = 60000;

		title_fg_color.blue = 60000;        

		GtkWidget *event_box_channel = create_event_box_lbl(

                                                        name->str, 90, 

									                    &title_bg_color, 

									                    &title_fg_color);

        gtk_box_pack_start (GTK_BOX (private->epg_channels_vbox),

		                    event_box_channel, FALSE, FALSE, 0);

  		GtkWidget *epg_line_hbox = gtk_hbox_new (FALSE, 0);      

	    GdkColor bg_color;

	    bg_color.red = 5000;

	    bg_color.green = 30000;

	    bg_color.blue = 60000;        

	    GdkColor fg_color;

	    fg_color.red = 60000;

	    fg_color.green = 60000;

	    fg_color.blue = 60000;        

		/* Content parsing */

        GList *epg_grid_list = NULL;

        GMythProgramInfo *proginfo;

        int pixel_count = 0;

        for (; proglist; proglist = proglist->next) {

            proginfo = (GMythProgramInfo *) proglist->data;

            GString *content_name = proginfo->title;

       	    int initial_time, last_time, duration;

            int schedule_start_time = proginfo->startts;

            int schedule_end_time   = proginfo->endts;

	        initial_time = 

                (schedule_start_time < start_time) ? start_time : schedule_start_time;

            last_time = (schedule_end_time > end_time) ? end_time : schedule_end_time;

	        duration = last_time - initial_time;

            // Verify program time 

            #if 0

			    g_debug ("ServiceID: %d, ScheduleID: %d\n", service->id, schedule->id);

                fprintf (stderr, "program time\nfrom = %d, to = %d\n", 

                         schedule->validFrom, schedule->validTo); 

                struct tm loctime;

                /* Convert it to local time representation. */

                if (localtime_r((time_t *)&schedule->validFrom, &loctime) == NULL) {

                    g_warning ("localtime_r error in mmyth_epg_grid_widget!\n");

                    return NULL;

                }            

                fprintf (stderr, asctime (&loctime)); 

                if (localtime_r((time_t *)&schedule->validTo, &loctime) == NULL) {

                    g_warning ("localtime_r error in mmyth_epg_grid_widget!\n");

                    return NULL;

                } 

                fprintf (stderr, asctime (&loctime)); 

            #endif

    	    /* fprintf(stderr, "duration = %d\n", duration); */

    	    double duration_hour = duration / (double) 3600.0;

    	    /* fprintf(stderr, "duration_hour = %lf\n", duration_hour); */

            int size = PIXELS_HOUR * duration_hour;

            /* complete hour */

            /* FIXME: UGLY WRONG HACK TO ALIGN PROGRAM TIME!!!*/

            if(last_time%3600 != 0) {

                size -= PROGRAM_SEPARATION;                

            }

            if(initial_time%3600 != 0) {

                size -= PROGRAM_SEPARATION;                

            }

            pixel_count += size + PROGRAM_SEPARATION;

	        GtkWidget *event_box = create_event_box_lbl(content_name->str, 

							  size, &bg_color, 

							  &fg_color);

							  gtk_widget_add_events(event_box, 

							  GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);

            /* create EpgGridItem */

            EpgGridItem *epg_grid_item = g_new(EpgGridItem, 1);

            epg_grid_item->proginfo  = proginfo;

            epg_grid_item->event_box = event_box;

            epg_grid_item->object    = mmyth_epg_grid_widget;

            epg_grid_list = g_list_prepend(epg_grid_list, (gpointer) epg_grid_item);                                   		                        

     	    gtk_box_pack_start (GTK_BOX (epg_line_hbox),

	                            event_box, FALSE, FALSE, PROGRAM_SEPARATION);

   	        g_signal_connect (G_OBJECT (event_box), "button-press-event",

		                      G_CALLBACK (mmyth_epg_grid_widget_clicked), 

                              (gpointer*) epg_grid_list);

        }

#if 0

        printf("chaind = %d!!!!" chanid);fflush(stdout);

#endif        

        if(!epg_grid_list) {

            /* No programs for current channel */

            /* FIXME: size HARDCODED */

            GtkWidget *event_box = create_event_box_lbl("No program list available",

                              PIXELS_HOUR * 3, &bg_color,

                              &fg_color);

                              gtk_widget_add_events(event_box,

                              GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);

            /* create EpgGridItem */

            EpgGridItem *epg_grid_item = g_new(EpgGridItem, 1);

            epg_grid_item->proginfo  = NULL;

            epg_grid_item->event_box = event_box;

            epg_grid_item->object    = mmyth_epg_grid_widget;

            epg_grid_list = g_list_prepend(epg_grid_list, (gpointer) epg_grid_item);

            gtk_box_pack_start (GTK_BOX (epg_line_hbox),

	                            event_box, FALSE, FALSE, PROGRAM_SEPARATION);            	

   	        g_signal_connect (G_OBJECT (event_box), "button-press-event",

		                      G_CALLBACK (mmyth_epg_grid_widget_clicked),

                              (gpointer*) epg_grid_list);

        }

        epg_grid_list = g_list_reverse(epg_grid_list);

        mmyth_epg_grid_widget->epg_view_model = 

              g_list_append(mmyth_epg_grid_widget->epg_view_model, epg_grid_list);

	    gtk_box_pack_start (GTK_BOX (private->epg_programs_vbox),

	                        epg_line_hbox, FALSE, FALSE,  0);                    		    		

    }

}

static void

mmyth_epg_grid_widget_mount_header(MMythEpgGridWidget *mmyth_epg_grid_widget)

{	          	    

    MMythEpgGridWidgetPrivate *private = 

        MMYTH_EPG_GRID_WIDGET_GET_PRIVATE(mmyth_epg_grid_widget);

    struct tm hour_tm;

    const gchar name_title[] = "Today";    

    GtkWidget * lbl_title = gtk_label_new(name_title);

    gtk_misc_set_alignment (GTK_MISC(lbl_title), 0.0, 0.5);

    gtk_box_pack_start (GTK_BOX (private->epg_channels_vbox),

                        lbl_title, FALSE, FALSE, 0);

	/* hours title line */

    GtkWidget *epg_programs_hours_hbox = gtk_hbox_new (TRUE, 0); 

    if (localtime_r((time_t *)&private->current_start_time, &hour_tm) == NULL) {

        g_warning ("localtime_r error in mmyth_epg_grid_widget!\n");

        return NULL;

    }    

    if (hour_tm.tm_min>30) {

        hour_tm.tm_min = 30;

    } else if (hour_tm.tm_min>0) {

        hour_tm.tm_min = 0;

    }

    gchar hour1_str[10];

    strftime(hour1_str, 8, "%H:%M", &hour_tm);

    GtkWidget * lbl_hour1 = gtk_label_new(hour1_str);

    gtk_misc_set_alignment (GTK_MISC(lbl_hour1), 0.0, 0.5);    

    hour_tm.tm_hour++;

    gchar hour2_str[10];    

    strftime(hour2_str, 8, "%H:%M", &hour_tm);

    GtkWidget * lbl_hour2 = gtk_label_new(hour2_str);

    gtk_misc_set_alignment (GTK_MISC(lbl_hour2), 0.0, 0.5);        

    hour_tm.tm_hour++;

	gchar hour3_str[10];    

    strftime(hour3_str, 8, "%H:%M", &hour_tm);

    GtkWidget * lbl_hour3 = gtk_label_new(hour3_str);

    gtk_misc_set_alignment (GTK_MISC(lbl_hour3), 0.0, 0.5);        

    gtk_box_pack_start (GTK_BOX (epg_programs_hours_hbox),

                        lbl_hour1, TRUE, TRUE, 0);                    

    gtk_box_pack_start (GTK_BOX (epg_programs_hours_hbox),

                        lbl_hour2, TRUE, TRUE, 0);                    

    gtk_box_pack_start (GTK_BOX (epg_programs_hours_hbox),

                        lbl_hour3, TRUE, TRUE, 0); 

    gtk_box_pack_start (GTK_BOX (private->epg_programs_vbox),

                        epg_programs_hours_hbox, FALSE, FALSE, 0);                        

}

/******************************************************************************

 *              INTERNAL CALLBACKS FOR STATE CHANGE                           *

 *****************************************************************************/

static void 

mmyth_epg_grid_widget_deselect_service(MMythEpgGridWidget *mmyth_epg_grid_widget)

{

	EpgGridItem *epg_grid_item;

  	/* deselect*/

    if(mmyth_epg_grid_widget->selected_grid_item != NULL) {

    	epg_grid_item = 

            (EpgGridItem*) mmyth_epg_grid_widget->selected_grid_item->data;

    	gtk_widget_set_state(GTK_WIDGET(epg_grid_item->event_box), GTK_STATE_NORMAL);

    }            

}

static void 

mmyth_epg_grid_widget_clicked (GtkWidget* widget, 

                               GdkEventExpose *event, gpointer data)

{           

    g_return_if_fail(data != NULL);

    GList *epg_grid_item_list = (GList *) data;

    EpgGridItem *epg_grid_item = (EpgGridItem *) epg_grid_item_list->data;

    /* update the selected service */

    mmyth_epg_grid_widget_update_service( epg_grid_item->object, (GList*) data );       

}

void

mmyth_epg_grid_widget_update_service(MMythEpgGridWidget * object,

                                     GList *selected_grid_list)

{

    g_return_if_fail(object != NULL);

    g_return_if_fail(selected_grid_list != NULL);

	EpgGridItem *epg_grid_item = (EpgGridItem *) selected_grid_list->data;

    mmyth_epg_grid_widget_deselect_service(epg_grid_item->object);

    /* updating current selected schedule_item and schedule_list*/

    object->selected_grid_item = selected_grid_list;

    /* set state of the event box */

    gtk_widget_set_state(GTK_WIDGET(epg_grid_item->event_box), GTK_STATE_SELECTED);

    /* emit update signal for listeners */

    g_signal_emit(object, 

                  mmyth_epg_grid_widget_signals[SELECTION_UPDATED_SIGNAL],

                  0,

                  (gpointer) epg_grid_item);

}

static GtkWidget * 

create_event_box_lbl(gchar *str, int width, const GdkColor *bg_color, 

                     const GdkColor *fg_color) 

{

    GtkWidget *event_box = gtk_event_box_new();

	GtkWidget *lbl = gtk_label_new(str);

    gtk_label_set_ellipsize(GTK_LABEL(lbl), PANGO_ELLIPSIZE_END);

    gtk_widget_modify_bg(event_box, GTK_STATE_NORMAL, bg_color);    

    gtk_widget_modify_fg(lbl, GTK_STATE_NORMAL, fg_color);    

    /* selected colors are const*/

    GdkColor selected_bg_color;

    selected_bg_color.red = 100;

    selected_bg_color.green = 40000;

    selected_bg_color.blue = 100;        

    GdkColor selected_fg_color;

    selected_fg_color.red = 100;

    selected_fg_color.green = 100;

    selected_fg_color.blue = 100;        

    gtk_widget_modify_bg(event_box, GTK_STATE_SELECTED, &selected_bg_color);    

    gtk_widget_modify_fg(lbl, GTK_STATE_SELECTED, &selected_fg_color);    

    gtk_misc_set_alignment (GTK_MISC(lbl), 0.0, 0.5);    

	gtk_container_add (GTK_CONTAINER (event_box),

                       lbl);

	gtk_widget_set_size_request(event_box, width, -1);

    return event_box;

}

/******************************************************************************

 *                            METHODS                                         *

 *****************************************************************************/

/* Callback for hardware keys */

gboolean

mmyth_epg_grid_widget_key_press (MMythEpgGridWidget * object, 

                                 GtkWidget * widget, GdkEventKey * event)

{

    MMythEpgGridWidgetPrivate *private = 

        MMYTH_EPG_GRID_WIDGET_GET_PRIVATE(object);

    EpgGridItem *epg_grid_item;

    GList *tmp;

    /* List of selected_grid_item */

    GList *selected_view_model;

    gint channel_index;

	if(object->selected_grid_item == NULL) {

        g_warning ("No program selected");

	    return FALSE;

	} 

    epg_grid_item = (EpgGridItem*) object->selected_grid_item->data;    

    channel_index = private->selected_channel_index;

    switch (event->keyval) {

        case GDK_Up:        

            selected_view_model = g_list_nth( object->epg_view_model, channel_index - 1 );

            if(selected_view_model != NULL) {

                private->selected_channel_index = channel_index - 1;

   	            tmp = (GList *) selected_view_model->data;               

                /* TODO: select a better centralized item 

                   currently is picking the 1st or last item */

                if(g_list_next(object->selected_grid_item) == NULL &&

                   g_list_previous(object->selected_grid_item) != NULL) {

                    /* in this case the new selected will be the last */ 

                    tmp = g_list_last(tmp);

                }

	            /* update the selected service */

                mmyth_epg_grid_widget_update_service( object, tmp );

            }    

        return TRUE;         

        case GDK_Down:

            selected_view_model = g_list_nth( object->epg_view_model, channel_index + 1 );            

            if(selected_view_model != NULL) {   	            

                private->selected_channel_index = channel_index + 1;

   	            tmp = (GList *) selected_view_model->data;

                /* TODO: select a better centralized item 

                   currently is picking the 1st or last item */

                if(g_list_next(object->selected_grid_item) == NULL &&

                   g_list_previous(object->selected_grid_item) != NULL) {

                    /* in this case the new selected will be the last */ 

                    tmp = g_list_last(tmp);

                }

	            /* update the selected service */

                mmyth_epg_grid_widget_update_service( object, tmp );

            }

        return TRUE;        

        case GDK_Left:    

            tmp = g_list_previous( object->selected_grid_item );

            if(tmp != NULL) {

	            /* update the selected service */

                mmyth_epg_grid_widget_update_service( object, tmp );

            }

        return TRUE;        

        case GDK_Right:

            tmp = g_list_next( object->selected_grid_item );

            if(tmp != NULL) {

	            /* update the selected service */

                mmyth_epg_grid_widget_update_service( object, tmp );

            }

        return TRUE;        

	    default:

	    return TRUE;

    }

    return FALSE;

}

static void 

mmyth_epg_grid_widget_fill_programinfos (MMythEpgGridWidgetPrivate *private)

{

    GList *channels_list = NULL;

    int y;

    if ((private->mmyth_epg != NULL) &&

	   	(gmyth_epg_get_channel_list (private->mmyth_epg, &channels_list) < 0 )) {

			private->channel_list = NULL;

			return;

    }

    private->channel_list = channels_list;

    for (y = 0; y < private->DISPLAY_CHANS && channels_list; y++) {

        GMythChannelInfo *channel_info = (GMythChannelInfo *) channels_list->data;

        mmyth_epg_grid_widget_fill_program_row_infos(

                            private, channel_info->channel_ID, y);

        channels_list = g_list_next (channels_list);

    }

}

static void 

mmyth_epg_grid_widget_fill_program_row_infos(MMythEpgGridWidgetPrivate *private,

                                             guint chanNum, guint row)

{    

    gint res =  gmyth_epg_get_program_list (private->mmyth_epg,

    					&(private->program_list[row]),

                        chanNum, private->current_start_time, 

                        private->current_end_time);

    if (res < 0) {

    	g_warning ("[%s] Error while retrieving epg programs", __FUNCTION__);

    }

}