/*
    Copyright (C) 2000-2006 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __ardour_plugin_h__
#define __ardour_plugin_h__

#include <boost/shared_ptr.hpp>
#include <sigc++/signal.h>
#include <glibmm/ustring.h>

#include <pbd/statefuldestructible.h> 
#include <pbd/controllable.h>

#include <jack/types.h>
#include <ardour/types.h>
#include <ardour/cycles.h>

#include <vector>
#include <set>
#include <map>

using std::string;
using std::vector;
using std::set;
using std::map;

namespace ARDOUR {

class AudioEngine;
class Session;

class Plugin;

typedef boost::shared_ptr<Plugin> PluginPtr;

class PluginInfo {
  public:
	PluginInfo () { }
	PluginInfo (const PluginInfo &o)
		: name(o.name), n_inputs(o.n_inputs), n_outputs(o.n_outputs),
		path (o.path), unique_id(o.unique_id), index(o.index) {}
	virtual ~PluginInfo () { }

	string name;
	string category;
 	Glib::ustring creator;
 	Glib::ustring path;
	uint32_t n_inputs;
	uint32_t n_outputs;
	ARDOUR::PluginType type;

	long unique_id;

	virtual PluginPtr load (Session& session) = 0;

  protected:
	friend class PluginManager;
	uint32_t index;
};

typedef boost::shared_ptr<PluginInfo> PluginInfoPtr;
typedef std::list<PluginInfoPtr> PluginInfoList;

class Plugin : public PBD::StatefulDestructible
{
  public:
	Plugin (ARDOUR::AudioEngine&, ARDOUR::Session&);
	Plugin (const Plugin&);
	virtual ~Plugin ();
	
	struct ParameterDescriptor {

	    /* essentially a union of LADSPA and VST info */

	    bool integer_step;
	    bool toggled;
	    bool logarithmic;
	    bool sr_dependent;
	    string label;
	    float lower;
	    float upper;
	    float step;
	    float smallstep;
	    float largestep;
	    bool min_unbound;
	    bool max_unbound;
	};

	virtual uint32_t unique_id() const = 0;
	virtual const char * label() const = 0;
	virtual const char * name() const = 0;
	virtual const char * maker() const = 0;
	virtual uint32_t parameter_count () const = 0;
	virtual float default_value (uint32_t port) = 0;
	virtual nframes_t latency() const = 0;
	virtual void set_parameter (uint32_t which, float val) = 0;
	virtual float get_parameter(uint32_t which) const = 0;

	virtual int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const = 0;
	virtual uint32_t nth_parameter (uint32_t which, bool& ok) const = 0;
	virtual void activate () = 0;
	virtual void deactivate () = 0;
	virtual void set_block_size (nframes_t nframes) = 0;

	virtual int connect_and_run (vector<Sample*>& bufs, uint32_t maxbuf, int32_t& in, int32_t& out, nframes_t nframes, nframes_t offset) = 0;
	virtual std::set<uint32_t> automatable() const = 0;
	virtual string describe_parameter (uint32_t) = 0;
	virtual string state_node_name() const = 0;
	virtual void print_parameter (uint32_t, char*, uint32_t len) const = 0;

	virtual bool parameter_is_audio(uint32_t) const = 0;
	virtual bool parameter_is_control(uint32_t) const = 0;
	virtual bool parameter_is_input(uint32_t) const = 0;
	virtual bool parameter_is_output(uint32_t) const = 0;

	virtual bool save_preset(string name) = 0;
	virtual bool load_preset (const string preset_label);
	virtual std::vector<std::string> get_presets();

	virtual bool has_editor() const = 0;

	sigc::signal<void,uint32_t,float> ParameterChanged;
	
	PBD::Controllable *get_nth_control (uint32_t);

	PluginInfoPtr get_info() { return _info; }
	void set_info (const PluginInfoPtr inf) { _info = inf; }

	ARDOUR::AudioEngine& engine() const { return _engine; }
	ARDOUR::Session& session() const { return _session; }

	void set_cycles (uint32_t c) { _cycles = c; }
	cycles_t cycles() const { return _cycles; }

  protected:
	ARDOUR::AudioEngine& _engine;
	ARDOUR::Session& _session;
	PluginInfoPtr _info;
	uint32_t _cycles;
	map<string,string> 	 presets;
	bool save_preset(string name, string domain /* vst, ladspa etc. */);

	void setup_controls ();

	struct PortControllable : public PBD::Controllable {
	    PortControllable (std::string name, Plugin&, uint32_t abs_port_id,
			      float lower, float upper, bool toggled, bool logarithmic);

	    void set_value (float);
	    float get_value () const;

	    Plugin& plugin;
	    uint32_t absolute_port;
	    float upper;
	    float lower;
	    float range;
	    bool  toggled;
	    bool  logarithmic;
	};

	vector<PortControllable*> controls;
};

PluginPtr find_plugin(ARDOUR::Session&, string name, long unique_id, ARDOUR::PluginType);

} // namespace ARDOUR
 
#endif /* __ardour_plugin_h__ */