/*
 * Copyright (C) 2011-2015 Karlsruhe Institute of Technology
 *
 * This file is part of Ufo.
 *
 * This library is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifdef __APPLE__
#include <OpenCL/cl.h>
#else
#include <CL/cl.h>
#endif

#include "ufo-roof-filter-task.h"


struct _UfoRoofFilterTaskPrivate {
    gboolean ready;						// Indicates if data is ready for generation
    gboolean block;                                             // Block output alltogether
    guint plane;						// Selected plane (0 - pass everything trough)
    gdouble fps;                                                // Limit maximum frame rate
};

static void ufo_task_interface_init (UfoTaskIface *iface);

G_DEFINE_TYPE_WITH_CODE (UfoRoofFilterTask, ufo_roof_filter_task, UFO_TYPE_TASK_NODE,
                         G_IMPLEMENT_INTERFACE (UFO_TYPE_TASK,
                                                ufo_task_interface_init))

#define UFO_ROOF_FILTER_TASK_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), UFO_TYPE_ROOF_FILTER_TASK, UfoRoofFilterTaskPrivate))

enum {
    PROP_0,
    PROP_PLANE,
    PROP_FPS,
    PROP_BLOCK,
    N_PROPERTIES
};

static GParamSpec *properties[N_PROPERTIES] = { NULL, };

UfoNode *
ufo_roof_filter_task_new (void)
{
    return UFO_NODE (g_object_new (UFO_TYPE_ROOF_FILTER_TASK, NULL));
}

static void
ufo_roof_filter_task_setup (UfoTask *task,
                       UfoResources *resources,
                       GError **error)
{
}

static void
ufo_roof_filter_task_get_requisition (UfoTask *task,
                                 UfoBuffer **inputs,
                                 UfoRequisition *requisition,
                                 GError **error)
{
    ufo_buffer_get_requisition (inputs[0], requisition);
}

static guint
ufo_roof_filter_task_get_num_inputs (UfoTask *task)
{
    return 1;
}

static guint
ufo_roof_filter_task_get_num_dimensions (UfoTask *task,
                                             guint input)
{
    return 2;
}

static UfoTaskMode
ufo_roof_filter_task_get_mode (UfoTask *task)
{
    return UFO_TASK_MODE_CPU|UFO_TASK_MODE_REDUCTOR;
}

static gboolean
ufo_roof_filter_task_process (UfoTask *task,
                         UfoBuffer **inputs,
                         UfoBuffer *output,
                         UfoRequisition *requisition)
{
    UfoRoofFilterTaskPrivate *priv;

    priv = UFO_ROOF_FILTER_TASK_GET_PRIVATE (task);

    if (priv->plane) {
	guint buf_plane;
	GValue *value;

	value = ufo_buffer_get_metadata(inputs[0], "plane");
	buf_plane = g_value_get_uint(value);
	if (buf_plane != priv->plane)
	    return TRUE;
    }

    ufo_buffer_copy(inputs[0], output);
    ufo_buffer_copy_metadata (inputs[0], output);
    priv->ready = TRUE;

    return FALSE;
}

static gboolean
ufo_roof_filter_task_generate (UfoTask *task,
                         UfoBuffer *output,
                         UfoRequisition *requisition)
{
    UfoRoofFilterTaskPrivate *priv;

    priv = UFO_ROOF_FILTER_TASK_GET_PRIVATE (task);
    if (!priv->ready) return FALSE;

/*
    GValue *value = ufo_buffer_get_metadata(output, "plane");
    guint buf_plane = g_value_get_uint(value);
    printf("Passing buffer for plane %u\n", buf_plane);
*/

    priv->ready = FALSE;

    return TRUE;
}

static void
ufo_roof_filter_task_set_property (GObject *object,
                              guint property_id,
                              const GValue *value,
                              GParamSpec *pspec)
{
    UfoRoofFilterTaskPrivate *priv = UFO_ROOF_FILTER_TASK_GET_PRIVATE (object);

    switch (property_id) {
        case PROP_BLOCK:
            priv->block = g_value_get_boolean(value);
            break;
        case PROP_PLANE:
            priv->plane = g_value_get_uint (value);
            break;
        case PROP_FPS:
            priv->fps = g_value_get_double (value);
            break;
        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
            break;
    }
}

static void
ufo_roof_filter_task_get_property (GObject *object,
                              guint property_id,
                              GValue *value,
                              GParamSpec *pspec)
{
    UfoRoofFilterTaskPrivate *priv = UFO_ROOF_FILTER_TASK_GET_PRIVATE (object);

    switch (property_id) {
        case PROP_BLOCK:
            g_value_set_boolean (value, priv->block);
            break;
        case PROP_PLANE:
            g_value_set_uint (value, priv->plane);
            break;
        case PROP_FPS:
            g_value_set_double (value, priv->fps);
            break;
        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
            break;
    }
}

static void
ufo_roof_filter_task_finalize (GObject *object)
{
    G_OBJECT_CLASS (ufo_roof_filter_task_parent_class)->finalize (object);
}

static void
ufo_task_interface_init (UfoTaskIface *iface)
{
    iface->setup = ufo_roof_filter_task_setup;
    iface->get_num_inputs = ufo_roof_filter_task_get_num_inputs;
    iface->get_num_dimensions = ufo_roof_filter_task_get_num_dimensions;
    iface->get_mode = ufo_roof_filter_task_get_mode;
    iface->get_requisition = ufo_roof_filter_task_get_requisition;
    iface->process = ufo_roof_filter_task_process;
    iface->generate = ufo_roof_filter_task_generate;
}

static void
ufo_roof_filter_task_class_init (UfoRoofFilterTaskClass *klass)
{
    GObjectClass *oclass = G_OBJECT_CLASS (klass);

    oclass->set_property = ufo_roof_filter_task_set_property;
    oclass->get_property = ufo_roof_filter_task_get_property;
    oclass->finalize = ufo_roof_filter_task_finalize;

    properties[PROP_BLOCK] =
        g_param_spec_boolean ("block",
            "Block/Unblock data stream",
            "Blocks all data output from the filter",
            FALSE,
            G_PARAM_READWRITE);

    properties[PROP_PLANE] =
        g_param_spec_uint ("plane",
            "Detector planes",
            "Only passes trough the data for the selecte plane",
            0, G_MAXUINT, 0,
            G_PARAM_READWRITE);

    properties[PROP_FPS] =
        g_param_spec_double ("fps",
            "Maximum frame rate",
            "Limits maximum frame rate",
            0, G_MAXDOUBLE, 0,
            G_PARAM_READWRITE);

    for (guint i = PROP_0 + 1; i < N_PROPERTIES; i++)
        g_object_class_install_property (oclass, i, properties[i]);

    g_type_class_add_private (oclass, sizeof(UfoRoofFilterTaskPrivate));
}

static void
ufo_roof_filter_task_init(UfoRoofFilterTask *self)
{
    self->priv = UFO_ROOF_FILTER_TASK_GET_PRIVATE(self);
}