#include <obs-module.h>
#include <obs-avc.h>
#include <util/platform.h>
#include <util/circlebuf.h>
#include <util/dstr.h>
#include <util/threading.h>
#include <inttypes.h>
#include "librtmp/rtmp.h"
#include "librtmp/log.h"
#include "flv-mux.h"
#include "net-if.h"

#ifdef _WIN32
#include <Iphlpapi.h>
#else
#include <sys/ioctl.h>
#endif

#define do_log(level, format, ...)                 \
	blog(level, "[rtmp stream: '%s'] " format, \
	     obs_output_get_name(stream->output), ##__VA_ARGS__)

#define warn(format, ...) do_log(LOG_WARNING, format, ##__VA_ARGS__)
#define info(format, ...) do_log(LOG_INFO, format, ##__VA_ARGS__)
#define debug(format, ...) do_log(LOG_DEBUG, format, ##__VA_ARGS__)

#define OPT_DYN_BITRATE "dyn_bitrate"
#define OPT_DROP_THRESHOLD "drop_threshold_ms"
#define OPT_PFRAME_DROP_THRESHOLD "pframe_drop_threshold_ms"
#define OPT_MAX_SHUTDOWN_TIME_SEC "max_shutdown_time_sec"
#define OPT_BIND_IP "bind_ip"
#define OPT_NEWSOCKETLOOP_ENABLED "new_socket_loop_enabled"
#define OPT_LOWLATENCY_ENABLED "low_latency_mode_enabled"
#define OPT_METADATA_MULTITRACK "metadata_multitrack"

//#define TEST_FRAMEDROPS
//#define TEST_FRAMEDROPS_WITH_BITRATE_SHORTCUTS

#ifdef TEST_FRAMEDROPS

#define DROPTEST_MAX_KBPS 3000
#define DROPTEST_MAX_BYTES (DROPTEST_MAX_KBPS * 1000 / 8)

struct droptest_info {
	uint64_t ts;
	size_t size;
};
#endif

struct dbr_frame {
	uint64_t send_beg;
	uint64_t send_end;
	size_t size;
};

struct rtmp_stream {
	obs_output_t *output;

	pthread_mutex_t packets_mutex;
	struct circlebuf packets;
	bool sent_headers;

	bool got_first_video;
	int64_t start_dts_offset;

	volatile bool connecting;
	pthread_t connect_thread;

	volatile bool active;
	volatile bool disconnected;
	volatile bool encode_error;
	volatile bool silent_reconnect;
	pthread_t send_thread;

	int max_shutdown_time_sec;

	os_sem_t *send_sem;
	os_event_t *stop_event;
	uint64_t stop_ts;
	uint64_t shutdown_timeout_ts;

	struct dstr path, key;
	struct dstr username, password;
	struct dstr encoder_name;
	struct dstr bind_ip;

	/* frame drop variables */
	int64_t drop_threshold_usec;
	int64_t pframe_drop_threshold_usec;
	int min_priority;
	float congestion;

	int64_t last_dts_usec;

	uint64_t total_bytes_sent;
	int dropped_frames;

#ifdef TEST_FRAMEDROPS
	struct circlebuf droptest_info;
	uint64_t droptest_last_key_check;
	size_t droptest_max;
	size_t droptest_size;
#endif

	pthread_mutex_t dbr_mutex;
	struct circlebuf dbr_frames;
	size_t dbr_data_size;
	uint64_t dbr_inc_timeout;
	long audio_bitrate;
	long dbr_est_bitrate;
	long dbr_orig_bitrate;
	long dbr_prev_bitrate;
	long dbr_cur_bitrate;
	long dbr_inc_bitrate;
	bool dbr_enabled;

	RTMP rtmp;

	bool new_socket_loop;
	bool low_latency_mode;
	bool disable_send_window_optimization;
	bool socket_thread_active;
	pthread_t socket_thread;
	uint8_t *write_buf;
	size_t write_buf_len;
	size_t write_buf_size;
	pthread_mutex_t write_buf_mutex;
	os_event_t *buffer_space_available_event;
	os_event_t *buffer_has_data_event;
	os_event_t *socket_available_event;
	os_event_t *send_thread_signaled_exit;
};

#ifdef _WIN32
void *socket_thread_windows(void *data);
#endif
