#ifndef PEBBLISP_H
#define PEBBLISP_H

#include "env.h"
#include "object.h"

struct Slice {
    const char* text;
    char length;
};

typedef struct Result {
    Object obj;
    struct Slice* slices;
} Result;

Object eval(const Object* obj, struct Environment* env);

Result parse(struct Slice* slices);

Result readSeq(struct Slice* slices);

Object parseAtom(struct Slice* slice);

Object parseEval(const char* input, struct Environment* env);

void evalForms(Object* destList, const Object* src, struct Environment* env);

void copySlice(char* dest, struct Slice* src);

Object evalLambdaArgs(const Object* arg_forms);

// Slices
void copySlice(char* dest, struct Slice* src);

void debugSlice(struct Slice* s);

#define BASIC_OP(_name) \
    Object _name(Object obj1, Object obj2, struct Environment *env);

BASIC_OP(add);

BASIC_OP(sub);

BASIC_OP(mul);

BASIC_OP(dvi);

BASIC_OP(mod);

BASIC_OP(equ);

BASIC_OP(gth);

BASIC_OP(lth);

BASIC_OP(and);

BASIC_OP(or);
#undef BASIC_OP

Object catObjects(const Object obj1, const Object obj2,
                  struct Environment* env);

Object filter(Object obj1, Object obj2, struct Environment* env);

Object append(Object list, Object newElement, struct Environment* env);

Object prepend(Object list, Object newElement, struct Environment* env);

Object at(Object index, Object list, struct Environment* env);

Object rest(Object list, Object ignore, struct Environment* env);

Object reverse(Object _list, Object ignore, struct Environment* ignore2);

Object isNum(Object test, Object ignore, struct Environment* ignore2);

Object isString(Object test, Object ignore, struct Environment* ignore2);

Object isErr(Object test, Object ignore, struct Environment* ignore2);

Object charAt(Object string, Object at, struct Environment* ignore);

Object charVal(Object test, Object ignore, struct Environment* ignore2);

Object print(Object p, Object ignore, struct Environment* ignore2);

Object pChar(Object c, Object i1, struct Environment* i2);

Object printEnvO(Object i1, Object i2, struct Environment* env);

Object parseEvalO(Object text, Object ignore, struct Environment* env);

#ifdef STANDALONE

Object takeInput(Object i1, Object i2, struct Environment* i3);

Object systemCall(Object call, Object _, struct Environment* i3);

Object loadFile(Object filename, Object _, struct Environment* env);

#endif

#endif