#ifndef BLUELIB_RANDOM_H_
#define BLUELIB_RANDOM_H_

#include <blue/core/status.h>
#include <stddef.h>

struct b_random_algorithm;

typedef enum b_random_flags {
	/* algorithm selection */
	B_RANDOM_MT19937 = 0x01u,

	/* generation flags */
	B_RANDOM_SECURE = 0x100u,
} b_random_flags;

typedef struct b_random_ctx {
	b_random_flags __f;
	struct b_random_algorithm *__a;

	union {
		struct {
			unsigned long long mt[312];
			size_t mti;
		} __mt19937;
	};
} b_random_ctx;

BLUE_API b_random_ctx *b_random_global_ctx(void);

BLUE_API b_status b_random_init(b_random_ctx *ctx, b_random_flags flags);
BLUE_API unsigned long long b_random_next_int64(b_random_ctx *ctx);
BLUE_API double b_random_next_double(b_random_ctx *ctx);
BLUE_API void b_random_next_bytes(
	b_random_ctx *ctx, unsigned char *out, size_t nbytes);

#endif