#ifndef FUSED_EVALUATE_H
#define FUSED_EVALUATE_H

#include <stdint.h>
#include <stdbool.h>
#include "book.h"
#include "triangle.h"
#include "config.h"
#include "slot.h"

/* Aggregated evaluation statistics for monitoring */
typedef struct {
    uint64_t triangles_evaluated;  /* total triangles evaluated since start */
    uint64_t signals_fired;        /* total signals generated since start */
    uint64_t books_missing;        /* count of evaluations skipped due to missing books */
    uint64_t triangles_skipped;    /* count of triangles skipped for other reasons */
    double   best_net_bps;         /* best net profit seen (basis points) */
    double   worst_net_bps;        /* worst net profit seen (basis points) */
    int64_t  last_eval_ts_ms;      /* timestamp of last evaluation (milliseconds) */
    char     best_triangle_key[48]; /* triangle key that produced best_net_bps */
} eval_stats_t;

/* Runtime state for the triangular arbitrage evaluator */
typedef struct {
    const triangle_set_t *triangles;   /* pre-enumerated triangle set (read-only) */
    const order_book_t   *books;       /* live order books array (read-only) */
    const config_t       *cfg;         /* application configuration (read-only) */
    executor_slot_t      *slots;       /* executor slots array */
    int                   n_slots;     /* number of slots */
    eval_stats_t          stats;       /* cumulative evaluation statistics */
    double                fee_mult;    /* combined fee multiplier (includes KCS discount) */
} evaluator_t;

/* Initialise evaluator with triangle set, books, config, and executor slots */
void evaluator_init(evaluator_t *ev, const triangle_set_t *triangles,
                    const order_book_t *books, const config_t *cfg,
                    executor_slot_t *slots, int n_slots, bool kcs_discount);

/* Evaluate all triangles involving the given symbol; returns true if a signal was fired */
bool evaluate_symbol(evaluator_t *ev, uint16_t symbol_idx, int64_t t_sock_arrive_ms, int64_t t_arrive_ms);

#endif