#ifndef XTLITE_ENGINE_H
#define XTLITE_ENGINE_H

#include "xtlite_types.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct xt_graph xt_graph;

typedef enum {
    XT_SIGNAL_AUDIO = 1,
    XT_SIGNAL_EVENT = 2,
    XT_SIGNAL_CONTROL = 3
} xt_signal_type;

typedef enum {
    XT_PORT_INPUT = 1,
    XT_PORT_OUTPUT = 2
} xt_port_direction;

typedef struct {
    float *samples;
    size_t frame_count;
    size_t channel_count;
} xt_audio_buffer;

/* Graph API is intentionally small in this first scaffold. */
xt_result xt_graph_create(size_t max_nodes, xt_graph **out_graph);
void xt_graph_destroy(xt_graph *graph);
xt_result xt_graph_add_gain(xt_graph *graph, float gain, size_t *out_node_id);
xt_result xt_graph_connect(xt_graph *graph, size_t source_node,
                           size_t destination_node);
xt_result xt_graph_validate(const xt_graph *graph);
xt_result xt_graph_process_offline(xt_graph *graph, const float *input,
                                   float *output, size_t frame_count,
                                   float input_gain);

#ifdef __cplusplus
}
#endif

#endif