#pragma once

#include <stdbool.h>
#include <stddef.h>

// names longer than this are refused, nobody needs a longer name
#define NAME_LENGTH_MAX 15

enum NodeKind
{
    NODE_CHAR,
    NODE_PARAMETER,

    TYPE_VOID,
    TYPE_INT32,
    TYPE_BYTE,
    TYPE_SIZE,
    TYPE_REMOVE_CV,
    TYPE_ARRAY,
    TYPE_CONDITIONAL,
    TYPE_DECLTYPE,
    TYPE_CHAR,
    TYPE_CHAR_CONSTANT,
    TYPE_TUPLE,
    TYPE_INVOKE,

    VALUE_DIFFERENCE,
    VALUE_SUM,
    VALUE_PRODUCT,
    VALUE_QUOTIENT,
    VALUE_EXTENT,
    VALUE_TUPLE_SIZE,
    VALUE_INTEGRAL_CONSTANT,
    VALUE_CONDITIONAL,
    VALUE_VARIABLE,
    VALUE_DECLVAL,

    COND_TRUE,
    COND_FALSE,
    COND_IS_SAME,
    COND_EQUAL,
    COND_LESS,

    STMT_DECLARE,
    STMT_UNDECLARE,
    STMT_ENABLE_IF,
    STMT_REPEAT,
    STMT_EMIT,
    STMT_STATIC_ASSERT,
    STMT_DEFINE,
    STMT_RETURN
};

struct Name
{
    char text[NAME_LENGTH_MAX + 1];
    size_t length;
};

struct Node
{
    enum NodeKind kind;
    int line;
    char character;
    char name[NAME_LENGTH_MAX + 1];
    struct Node* first;
    struct Node* second;
    struct Node* third;
    struct Node* body;
    struct Node* next;
};

void name_init(struct Name* name);
bool name_push(struct Name* name, char character);

struct Node* node_leaf(enum NodeKind kind);
struct Node* node_char(char character);
struct Node* node_unary(enum NodeKind kind, struct Node* first);
struct Node* node_binary(enum NodeKind kind, struct Node* first, struct Node* second);
struct Node* node_ternary(enum NodeKind kind, struct Node* first, struct Node* second,
                          struct Node* third);
struct Node* node_named(enum NodeKind kind, const struct Name* name, struct Node* first);
struct Node* node_block(enum NodeKind kind, struct Node* first, struct Node* body);

struct Node* node_append(struct Node* list, struct Node* node);
void node_free(struct Node* node);