#include "../libtimer/timer.h"
#include "../libosmocc/endpoint.h"
#include "../libosmocc/helper.h"
#include "../libsample/sample.h"
#include "../libjitter/jitter.h"
#include "../libwave/wave.h"
#include "../libdtmf/dtmf_decode.h"


enum call_state {
	CALL_STATE_IDLE = 0,
	CALL_STATE_SETUP,
	CALL_STATE_OVERLAP,
	CALL_STATE_PROCEEDING,
	CALL_STATE_ALERTING,
	CALL_STATE_CONNECT,
	CALL_STATE_DISC_FROM_ORIG,
	CALL_STATE_DISC_FROM_TERM,
};

#include "routing.h"

/* relation to upper layer */
typedef struct call_relation {
	struct call_relation	*next;
	int			num;		/* number counter for debugging */
	struct call		*call;		/* points to the call */
	uint32_t		cc_callref;	/* callref for each releation */
	const char		*sdp;		/* received SDP? */
	int			tones_recv;	/* are inband tones available? */
	jitter_t		orig_dejitter;	/* jitter buffer for call recording (originating source) */
	jitter_t		term_dejitter;	/* jitter buffer for call recording (terminating source) */

	char			interface[256];	/* interface */
	char			id[256];	/* caller ID / dialing*/
	enum call_state		state;		/* state for status display */

	int			rtp_proxy;
	osmo_cc_session_t	*cc_session;
	int			codec_negotiated;
	osmo_cc_session_codec_t	*codec;

	wave_play_t		play;		/* play a wave file */
	int			play_loop;	/* set to play loop */
	char			play_filename[256];/* stored for reopen on loop */
	double			play_deviation;	/* stored for reopen on loop */
	wave_rec_t		rec;		/* record a wave file */
	dtmf_dec_t		dtmf_dec;	/* dtmf decoder */
	int			dtmf_dec_enable;/* feed decoder with data */
} call_relation_t;

/* call instance */
typedef struct call {
	struct call		*next;
	int			num;		/* number counter for debugging */

	/* call */
	enum call_state		state;		/* current state of call */
	osmo_cc_msg_t		*setup_msg;	/* stored setup message for later IE forwarding */
	char			dialing_number[256]; /* accumulated dial string (setup + info) */
	char			dialing_keypad[256]; /* accumulated keypad string (setup + info) */
	int			forking;	/* set, if call is forked (started with 2 or more calls) */
	uint8_t			collect_cause;	/* cause from forking calls */
	call_relation_t		*relation_list;	/* list of all upper layer relations */
	/* NOTE: the first relation is always the originator */
	int			tones_sent;	/* did we announce inband tones? */
	int			sdp_forwarded;	/* if set, we cannot do RTP-Proxy anymore */

	/* routing */
	routing_t		routing;

	/* audio */
	double			tx_gain;	/* gain of what is received from originator */
	double			rx_gain;	/* gain of what is transmitted to the originator */
} call_t;

extern call_t *call_list;

int call_init(osmo_cc_endpoint_t *ep, const char *_routing_script, const char *_routing_shell);
void call_exit(void);
int call_handle(void);
void cc_message(osmo_cc_endpoint_t *ep, uint32_t callref, osmo_cc_msg_t *msg);