/* date = July 9th 2023 11:08 am */

#ifndef VN_SCENE_H
#define VN_SCENE_H

////////////////////////////////
//~ sixten: Scene Node Types
enum scene_node_kind
{
    S_NodeKind_Invalid,
    S_NodeKind_File,
    S_NodeKind_Proc,
    S_NodeKind_Text,
    S_NodeKind_Branch,
    S_NodeKind_Count,
};

struct scene_node
{
    scene_node *Next;
    scene_node *Prev;
    scene_node *First;
    scene_node *Last;
    scene_node *Parent;
    
    scene_node *FirstTag;
    scene_node *LastTag;
    
    scene_node_kind Kind;
    string String;
    
    u64 SourceOffset;
};

////////////////////////////////
//~ sixten: Scene Messages
enum scene_message_type
{
    S_MessageType_Invalid,
    S_MessageType_Note,
    S_MessageType_Warning,
    S_MessageType_Error,
};

struct scene_message
{
    scene_message_type Type;
    scene_message *Next;
    scene_node *Node;
    string String;
};

struct scene_message_list
{
    scene_message *First;
    scene_message *Last;
    s64 Count;
};

////////////////////////////////
//~ sixten: Text -> Tokens
struct scene_tokenize_result
{
    token_array Tokens;
    scene_message_list Messages;
};

struct scene_parse_context
{
    token *TokensStart;
    token *TokensEnd;
    token *Token;
};

////////////////////////////////
//~ sixten: Tokens -> Syntax Tree
struct scene_parse_result
{
    scene_node *Root;
    scene_message_list Messages;
};

////////////////////////////////
//~ sixten: Scene Message Functions
static void S_PushMessage(memory_arena *Arena, scene_message_list *Messages, scene_node *Node, scene_message_type Type, string String);;

////////////////////////////////
//~ sixten: Scene Node Functions
static scene_node *S_PushNode(memory_arena *Arena, scene_node_kind Kind, string String);
static scene_node *S_SceneFromText(memory_arena *Arena, string Text);

////////////////////////////////
//~ sixten: Tokens -> Syntax Tree
static scene_node *S_ParseProc(scene_parse_context *Context, string ProcName);
static scene_parse_result S_ParseFromTokens(memory_arena *Arena, string Filename, string Text,  token_array Tokens);

#endif //VN_SCENE_H