#ifndef BDL_NODES_H
#define BDL_NODES_H

typedef enum NodeType {
    NODE_BUILTIN,
    NODE_NUMBER,
    NODE_BOOL,
    NODE_STRING,
    NODE_SYMBOL,
    NODE_TYPE,
    NODE_DEF,
    NODE_SET,
    NODE_FUN,
    NODE_BLOCK,
    NODE_IF,
    NODE_FUNCALL,
} NodeType;

typedef struct Node {
    size_t id;
    NodeType type;
    size_t line;
    size_t col;
    struct Type *expr_type;

    union {
        // Numbers.
        struct {
            bool negative;
            size_t integral;
            size_t fractional;
        } number;

        // String/symbol/type.
        StringView string;

        // Boolean.
        bool boolean;

        // Builtin primitive.
        struct {
            TokenType type;
            struct Node **args;
        } builtin;

        // Function call.
        struct {
            struct Node *name;
            struct Node **args;
        } funcall;

        // Variable definition.
        struct {
            struct Node *symbol;
            struct Node *value;
            struct Node *type;
        } def;

        // Variable assignment.
        struct {
            struct Node *symbol;
            struct Node *value;
        } set;

        // Function definition.
        struct {
            struct Node *name;
            struct Node **param_names;
            struct Node **param_types;
            struct Node *return_type;
            struct Node *body;
        } fun;

        // Block statements.
        struct {
            struct Node **expr;
        } block;

        // If statement.
        struct {
            struct Node *cond;
            struct Node *expr_true;
            struct Node *expr_false;
        } ifexpr;
    };
} Node;

#endif // BDL_NODES_H