// Kyler Olsen
// YREA SLS
// Interpreter Header
// November 2025

#ifndef SLS_INTERPRETER_H
#define SLS_INTERPRETER_H

#include <stddef.h>

#include "sls/lexer.h"
#include "sls/hash_table.h"

typedef enum {
    STACK_IDENTIFIER,
    STACK_I64,
    STACK_I32,
    STACK_I16,
    STACK_I8,
    STACK_U64,
    STACK_U32,
    STACK_U16,
    STACK_U8,
    STACK_FLOAT,
    STACK_DOUBLE,
    STACK_CHARACTER,
    STACK_BOOLEAN,
    STACK_TOKEN_STRING,
} StackType;

extern const char *STACK_TYPES_NAMES[];
extern const size_t STACK_TYPE_COUNT;

typedef struct StackItem {
    StackType type;
    union {
        Identifier identifier;
        int64_t i64;
        int32_t i32;
        int16_t i16;
        int8_t i8;
        uint64_t u64;
        uint32_t u32;
        uint16_t u16;
        uint8_t u8;
        float f32;
        double f64;
        char character;
        Boolean boolean;
        TokenString token_string;
    };
    struct StackItem *next;
} StackItem;

typedef struct {
    StackItem *stack;
    HashTable *functions;
} InterpreterState;

void execute(InterpreterState *interpreter_state, LexerTokenResult *token);
InterpreterState *interpreter_create();
void interpreter_delete(InterpreterState *interpreter_state);

#endif // SLS_INTERPRETER_H