#ifndef AMALGAM_AST_H
#define AMALGAM_AST_H

#include "buffer_view.h"
#include "buffer.h"
#include "misc.h"

typedef struct FunctionDecl FunctionDecl;
typedef struct FunctionCall FunctionCall;
typedef struct LhsExpr LhsExpr;

typedef union {
    FunctionDecl *func_decl;
    FunctionCall *func_call;
    LhsExpr *lhs_expr;
} AstValue;

typedef enum {
    AST_NONE,
    AST_FUNCTION_DECL,
    AST_FUNCTION_CALL,
    AST_LHS
} AstType;

typedef struct {
    AstValue value;
    AstType type;
} Ast;

struct FunctionDecl {
    BufferView name;
    Buffer body;
};

struct FunctionCall {
    BufferView name;
};

struct LhsExpr {
    int isConst;
    BufferView var_name;
    Ast rhs_expr;
};

Ast ast_none();

CHECK_RESULT int funcdecl_init(FunctionDecl *self, ScopedAllocator *allocator);
CHECK_RESULT int funcdecl_add_to_body(FunctionDecl *self, Ast ast);

void funccall_init(FunctionCall *self, BufferView name);

void lhsexpr_init(LhsExpr *self, int isConst, BufferView var_name);

#endif