/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#include <glib.h>
#include <string.h>
#include "debug.h"
#include "item.h"
#include "speech.h"
#include "plugin.h"

struct speech {
	struct speech_priv *priv;
	struct speech_methods meth;
	struct attr **attrs;
};


struct speech *
speech_new(struct attr *parent, struct attr **attrs) 
{
	struct speech *this_;
	struct speech_priv *(*speech_new)(struct speech_methods *meth, struct attr **attrs, struct attr *parent);
	struct attr *attr;

	attr=attr_search(attrs, NULL, attr_type);
	if (! attr) {
		dbg(0,"type missing\n");
		return NULL;
	}
	dbg(1,"type='%s'\n", attr->u.str);
	speech_new=plugin_get_speech_type(attr->u.str);
	dbg(1,"new=%p\n", speech_new);
	if (! speech_new) {
		dbg(0,"wrong type '%s'\n", attr->u.str);
		return NULL;
	}
	this_=g_new0(struct speech, 1);
	this_->priv=speech_new(&this_->meth, attrs, parent);
	this_->attrs=attr_list_dup(attrs);
	dbg(1, "say=%p\n", this_->meth.say);
	dbg(1,"priv=%p\n", this_->priv);
	if (! this_->priv) {
		attr_list_free(this_->attrs);
		g_free(this_);
		return NULL;
	}
	dbg(1,"return %p\n", this_);
	
	return this_;
}

void
speech_destroy(struct speech *this_)
{
	this_->meth.destroy(this_->priv);
	attr_list_free(this_->attrs);
	g_free(this_);
}

int
speech_say(struct speech *this_, const char *text)
{
	dbg(1, "this_=%p text='%s' calling %p\n", this_, text, this_->meth.say);
	return (this_->meth.say)(this_->priv, text);
}

/**
 * @brief Gets an attribute from a speech plugin
 *
 * @param this_ The speech plugin the attribute should be read from
 * @param type The type of the attribute to be read
 * @param attr Pointer to an attrib-structure where the attribute should be written to
 * @param iter (NOT IMPLEMENTED) Used to iterate through all attributes of a type. Set this to NULL to get the first attribute, set this to an attr_iter to get the next attribute
 * @return True if the attribute type was found, false if not
 */

int
speech_get_attr(struct speech *this_, enum attr_type type, struct attr *attr, struct attr_iter *iter)
{
	return attr_generic_get_attr(this_->attrs, NULL, type, attr, iter);
}

/**
 * @brief Tries to estimate how long it will take to speak a certain string
 *
 * This function tries to estimate how long it will take to speak a certain string
 * passed in str. It relies on the "characters per second"-value passed from the
 * configuration.
 *
 * @param this_ The speech whose speed should be used
 * @param str The string that should be estimated
 * @return Time in tenth of seconds or -1 on error
 */
int
speech_estimate_duration(struct speech *this_, char *str)
{
	int count;
	struct attr cps_attr;

	if (!speech_get_attr(this_,attr_cps,&cps_attr,NULL)) {
		return -1;
	}

	count = strlen(str);
	
	return (count * 10) / cps_attr.u.num;
}

/**
 * @brief Sets an attribute from an speech plugin
 *
 * This sets an attribute of a speech plugin, overwriting an attribute of the same type if it
 * already exists. This function also calls all the callbacks that are registred
 * to be called when attributes change.
 *
 * @param this_ The speech plugin to set the attribute of
 * @param attr The attribute to set
 * @return True if the attr could be set, false otherwise
 */

int
speech_set_attr(struct speech *this_, struct attr *attr)
{
	this_->attrs=attr_generic_set_attr(this_->attrs, attr);
	//callback_list_call_attr_2(this_->attr_cbl, attr->type, this_, attr);
	return 1;
}