#pragma once

#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <stddef.h>
#include <stdbool.h>
#include <limits.h>

#define MAX_MATCHED_PATTERNS 32
#define MAX_MATCHED_RULES    16

typedef enum {
	VERDICT_UNKNOWN = 0,
	VERDICT_ALLOW,
	VERDICT_BLOCK,
	VERDICT_QUARANTINE,
	VERDICT_INFORMATIONAL
} scan_verdict_t;

struct hash_entry {
	char               path[PATH_MAX];
	char               md5[33];
	char               sha256[65];
	double             entropy;
	struct stat        sb;
	time_t             last_scanned;
	size_t             scan_count;

	scan_verdict_t     verdict;
	const char        *matched_patterns[MAX_MATCHED_PATTERNS];
	size_t             matched_pattern_count;
	const char        *matched_rules[MAX_MATCHED_RULES];
	size_t             matched_rule_count;

	struct hash_entry *next; // collision handling
};

struct hash_ledger {
	size_t              num_buckets;
	struct hash_entry **buckets;
};

// structure to hold output for multihash()
struct multihash {
	char    md5[33];
	char    sha256[65];
	double  entropy;
};

// TODO hash_ledger_t
struct hash_ledger *hash_ledger_init(size_t num_buckets);
void hash_ledger_destroy(struct hash_ledger *ledger);
size_t hash_ledger_bucket(struct hash_ledger *ledger, const char *path);
struct hash_entry *hash_ledger_find(struct hash_ledger *ledger, const char *path);
struct hash_entry *hash_ledger_add_or_update(struct hash_ledger *ledger,
											 const char *path,
											 struct stat *sb);
bool multihash_file(const char *path, struct multihash *out);