#include "arc/std/config.h"
#include "arc/std/parser/helpers.h"
#include "arc/std/bool.h"
#include "arc/std/errno.h"
#include "arc/std/hashtable.h"
#include "arc/std/parser.h"
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

struct ARC_Config {
    ARC_Parser *parser;

    ARC_Hashtable *types;

    ARC_Hashtable *groups;
    ARC_Hashtable *currentGroup;

    ARC_Bool load;
};

typedef struct ARC_ConfigTypeData {
    void *data;
    ARC_ConfigType_DestroyFn destroyFn;
} ARC_ConfigTypeData;

void ARC_Config_InitLexerRulesFn(ARC_Lexer *lexer){
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_TAB    , '\t'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_NEWLINE, '\n'));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_SPACE       , ' ' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_BANG        , '!' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_QUOTE       , '"' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_HASH        , '#' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_DOLLAR      , '$' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_PERCENT     , '%' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_AMPERSAND   , '&' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_SINGLE_QUOTE, '\''));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_OPEN_PAREN  , '(' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_CLOSE_PAREN , ')' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_ASTERISK    , '*' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_PLUS        , '+' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_COMMA       , ',' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_MINUS       , '-' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_PERIOD      , '.' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_SLASH       , '/' ));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharOrBetween(ARC_CONFIG_NUMBER    , '0', '9'));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_COLON        , ':'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_SEMICOLON    , ';'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_LESS_THAN    , '<'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_GREATER_THAN , '>'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_EQUAL        , '='));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_QUESTION_MARK, '?'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_AT           , '@'));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharOrBetween(ARC_CONFIG_ALPHA_UPPER_CHAR, 'A', 'Z'));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_OPEN_BRACKET , '[' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_BACKSLASH    , '\\'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_CLOSE_BRACKET, ']' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_CARET        , '^' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_UNDERSCORE   , '_' ));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_GRAVE        , '`' ));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharOrBetween(ARC_CONFIG_ALPHA_LOWER_CHAR, 'a', 'z'));

    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_OPEN_CURLY_BRACE , '{'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_VERTICAL_LINE    , '|'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_CLOSE_CURLY_BRACE, '}'));
    ARC_Lexer_RegisterTokenRule(lexer, ARC_LexerTokenRule_CreateAndReturnMatchCharRule(ARC_CONFIG_TILDE            , '~'));
}

uint32_t ARC_Config_GetStringIdFn(ARC_String *string){
    if(ARC_String_EqualsCStringWithStrlen(string, "LAMBDA")){
        return ARC_PARSER_TAG_LAMBDA;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "TAB")){
        return ARC_CONFIG_TAB;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "NEWLINE")){
        return ARC_CONFIG_NEWLINE;
    }

    if(ARC_String_EqualsCStringWithStrlen(string, "SPACE")){
        return ARC_CONFIG_SPACE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "BANG")){
        return ARC_CONFIG_BANG;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "QUOTE")){
        return ARC_CONFIG_QUOTE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "HASH")){
        return ARC_CONFIG_HASH;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "DOLLAR")){
        return ARC_CONFIG_DOLLAR;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "PERCENT")){
        return ARC_CONFIG_PERCENT;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "AMPERSAND")){
        return ARC_CONFIG_AMPERSAND;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "SINGLE_QUOTE")){
        return ARC_CONFIG_SINGLE_QUOTE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "OPEN_PAREN")){
        return ARC_CONFIG_OPEN_PAREN;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "CLOSE_PAREN")){
        return ARC_CONFIG_CLOSE_PAREN;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "ASTERISK")){
        return ARC_CONFIG_ASTERISK;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "PLUS")){
        return ARC_CONFIG_PLUS;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "COMMA")){
        return ARC_CONFIG_COMMA;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "MINUS")){
        return ARC_CONFIG_MINUS;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "PERIOD")){
        return ARC_CONFIG_PERIOD;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "SLASH")){
        return ARC_CONFIG_SLASH;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "NUMBER")){
        return ARC_CONFIG_NUMBER;
    }

    if(ARC_String_EqualsCStringWithStrlen(string, "COLON")){
        return ARC_CONFIG_COLON;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "SEMICOLON")){
        return ARC_CONFIG_SEMICOLON;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "LESS_THAN")){
        return ARC_CONFIG_LESS_THAN;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "GREATER_THAN")){
        return ARC_CONFIG_GREATER_THAN;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "EQUAL")){
        return ARC_CONFIG_EQUAL;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "QUESTION_MARK")){
        return ARC_CONFIG_QUESTION_MARK;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "AT")){
        return ARC_CONFIG_AT;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "ALPHA_UPPER_CHAR")){
        return ARC_CONFIG_ALPHA_UPPER_CHAR;
    }

    if(ARC_String_EqualsCStringWithStrlen(string, "OPEN_BRACKET")){
        return ARC_CONFIG_OPEN_BRACKET;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "BACKSLASH")){
        return ARC_CONFIG_BACKSLASH;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "CLOSE_BRACKET")){
        return ARC_CONFIG_CLOSE_BRACKET;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "CARET")){
        return ARC_CONFIG_CARET;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "UNDERSCORE")){
        return ARC_CONFIG_UNDERSCORE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "GRAVE")){
        return ARC_CONFIG_GRAVE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "ALPHA_LOWER_CHAR")){
        return ARC_CONFIG_ALPHA_LOWER_CHAR;
    }

    if(ARC_String_EqualsCStringWithStrlen(string, "OPEN_CURLY_BRACE")){
        return ARC_CONFIG_OPEN_CURLY_BRACE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "VERTICAL_LINE")){
        return ARC_CONFIG_VERTICAL_LINE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "CLOSE_CURLY_BRACE")){
        return ARC_CONFIG_CLOSE_CURLY_BRACE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "TILDE")){
        return ARC_CONFIG_TILDE;
    }

    if(ARC_String_EqualsCStringWithStrlen(string, "<language>")){
        return ARC_CONFIG_LANGUAGE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<group>")){
        return ARC_CONFIG_GROUP;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<groupName>")){
        return ARC_CONFIG_GROUP_NAME;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<groupArgs>")){
        return ARC_CONFIG_GROUP_ARGS;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<variableLines>")){
        return ARC_CONFIG_VARIABLE_LINES;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<variableLine>")){
        return ARC_CONFIG_VARIABLE_LINE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<allowSpace>")){
        return ARC_CONFIG_ALLOW_SPACE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<type>")){
        return ARC_CONFIG_TYPE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<value>")){
        return ARC_CONFIG_VALUE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<nestedValue>")){
        return ARC_CONFIG_NESTED_VALUE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<valueArgs>")){
        return ARC_CONFIG_VALUE_ARGS;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<variable>")){
        return ARC_CONFIG_VARIABLE;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<variableName>")){
        return ARC_CONFIG_VARIABLE_NAME;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<variableChar>")){
        return ARC_CONFIG_VARIABLE_CHAR;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<string>")){
        return ARC_CONFIG_STRING;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<stringChars>")){
        return ARC_CONFIG_STRING_CHARS;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<stringChar>")){
        return ARC_CONFIG_STRING_CHAR;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<escapeChar>")){
        return ARC_CONFIG_ESCAPE_CHAR;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<numberSign>")){
        return ARC_CONFIG_NUMBER_SIGN;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<number>")){
        return ARC_CONFIG_NUMBER_TAG;
    }
    if(ARC_String_EqualsCStringWithStrlen(string, "<whitespace>")){
        return ARC_CONFIG_WHITESPACE;
    }

    return ~(uint32_t)0;
}

//private function to check hashtable keys used by config
ARC_Bool ARC_Config_HashtableKeyCompareFn(void *key1, void *key2){
    return (ARC_Bool)strcmp((const char *)key1, (const char *)key2) == 0;
}

//private function to clean up types
void ARC_Config_TypeHashtableDestroyKeyValueFn(void *key, void *value){
    free((char *)key);
    free((ARC_ConfigType *)value);
}

//private function to clean up groups
void ARC_Config_GroupHashtableDestroyKeyValueFn(void *key, void *value){
    free((char *)key);
    ARC_Hashtable_Destroy((ARC_Hashtable *)value);
}

//private function to clean up goup data
void ARC_Config_GroupDataHashtableDestroyKeyValueFn(void *key, void *value){
    free((char *)key);

    ARC_ConfigTypeData *typeData = (ARC_ConfigTypeData *)value;
    typeData->destroyFn(typeData->data);
    free(typeData);
}

//<variableLine> -> <whitespace> <type> <whitespace> <variable> <whitespace> EQUAL <whitespace> <value> <whitespace> SEMICOLON
void ARC_ConfigData_RunVariableLineTag(ARC_ParserTagToken *tagToken, ARC_Config *config){
    //skip whitespace and check for group name
    ARC_ParserTagToken *childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 1);

    //get the type
    ARC_String *typeString;
    ARC_String_Create(&typeString, NULL, 0);
    ARC_ParserData_HelperRecurseStringAdd(&typeString, childTagToken);

    //check if type exists in the types hashtable
    ARC_ConfigType *type = (ARC_ConfigType *)ARC_Hashtable_Get(config->types, typeString->data);
    if(type == NULL){
        //throw an error and return
        arc_errno = ARC_ERRNO_DATA;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("ARC_ConfigData_RunVariableLineTag(tagToken, config), type \"%s\" was not registered to config", typeString->data);
        ARC_String_Destroy(typeString);
        return;
    }

    //cleanup
    ARC_String_Destroy(typeString);

    //get the variable
    childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 3);
    ARC_String *variableString;
    ARC_String_Create(&variableString, NULL, 0);
    ARC_ParserData_HelperRecurseStringAdd(&variableString, childTagToken);

    //check if removing
    if(config->load == ARC_False){
        ARC_Hashtable_Remove(config->currentGroup, (void *)variableString->data);
        ARC_String_Destroy(variableString);
        return;
    }

    //check to see if the current variable is already in the current group hashtable
    ARC_ConfigTypeData *typeData = (ARC_ConfigTypeData *)ARC_Hashtable_Get(config->currentGroup, variableString->data);
    if(typeData != NULL){
        //there is already a value so throw an error and return
        arc_errno = ARC_ERRNO_DATA;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("ARC_ConfigData_RunVariableLineTag(tagToken, config), variable \"%s\" already registered to the current group", variableString->data);
        ARC_String_Destroy(variableString);
        return;
    }

    //copy the string into a cstring that will be stored in the hashtable
    char *nameVariableCStr = malloc(sizeof(char) * (variableString->length + 1));
    strncpy(nameVariableCStr, variableString->data, variableString->length);
    nameVariableCStr[variableString->length] = '\0';
    ARC_String_Destroy(variableString);

    //get <value>
    childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 7);

    //check if <value> is a reference
    ARC_String *valueString;
    ARC_String_Create(&valueString, NULL, 0);
    ARC_ParserData_HelperRecurseStringAdd(&valueString, childTagToken);
    void *value = ARC_Hashtable_Get(config->currentGroup, valueString);
    ARC_String_Destroy(valueString);

    //create where to store either the reference or type data
    typeData = (ARC_ConfigTypeData *)malloc(sizeof(ARC_ConfigTypeData));
    if(value != NULL){
        //point to the already stored data
        typeData->data = value;
        typeData->destroyFn = NULL;

        //add to the current group hashtable
        ARC_Hashtable_Add(config->currentGroup, (void *)nameVariableCStr, (void *)typeData);
        return;
    }

    //passed the parsed value into the copy type function and set the destroy function
    type->copyFn(&(typeData->data), childTagToken, config, type->userdata);
    typeData->destroyFn = type->destroyFn;

    //add to the current group hashtable
    ARC_Hashtable_Add(config->currentGroup, (void *)nameVariableCStr, (void *)typeData);
}

//<variableLines> -> <variableLine> <whitespace> <variableLines> | <variableLine>
void ARC_ConfigData_RunVariableLinesTag(ARC_ParserTagToken *tagToken, ARC_Config *config){
//loop through the tags either going to the next line or the next body
    for(uint32_t index = 0; index < ARC_Vector_GetSize(tagToken->tagTokens); index++){
        ARC_ParserTagToken *childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, index);

        switch(childTagToken->id){
            //recuse to run the next line
            case ARC_CONFIG_VARIABLE_LINES:
                ARC_ConfigData_RunVariableLinesTag(childTagToken, config);
                if(arc_errno != 0){
                    ARC_DEBUG_LOG_ERROR("ARC_ConfigData_RunVariableLinesTag(tagToken, config), config errored when trying to used parsed data for variable lines");
                    return;
                }
                continue;

            //recurse into a variable line tag
            case ARC_CONFIG_VARIABLE_LINE:
                ARC_ConfigData_RunVariableLineTag(childTagToken, config);
                if(arc_errno != 0){
                    ARC_DEBUG_LOG_ERROR("ARC_ConfigData_RunVariableLinesTag(tagToken, config), config errored when trying to used parsed data for variable line");
                    return;
                }
                continue;

            //this is for whitespace and any oddities
            default:
                continue;
        }
    }
}

//<group> -> <whitespace> <groupName> <whitespace> <variable> <whitespace> OPEN_CURLY_BRACE <groupArgs> <whitespace> CLOSE_CURLY_BRACE
void ARC_ConfigData_RunGroupTag(ARC_ParserTagToken *tagToken, ARC_Config *config){
    //skip whitespace and check for group name
    ARC_ParserTagToken *childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 1);

    /* ~ <groupName> ~ */
    //get the group name and check if it is named "group"
    //NOTE: this check may be usedful in the future if there is different functionality for group like tag names
    ARC_String *groupName;
    ARC_String_Create(&groupName, NULL, 0);
    ARC_ParserData_HelperRecurseStringAdd(&groupName, childTagToken);
    if(ARC_String_EqualsCStringWithStrlen(groupName, ARC_CONFIG_GROUP_TAG_NAME) == ARC_False){
        //throw an error and return
        arc_errno = ARC_ERRNO_DATA;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("ARC_ConfigData_RunGroupTag(tagToken, config), config contained keyword \"%s\" instead of using the correct keyword: \"%s\" ", groupName->data, ARC_CONFIG_GROUP_TAG_NAME);
        ARC_String_Destroy(groupName);
        return;
    }

    //cleanup
    ARC_String_Destroy(groupName);

    /* ~ <variable> ~ */
    //get the group's variable name
    childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 3);
    ARC_String *groupVariable;
    ARC_String_Create(&groupVariable, NULL, 0);
    ARC_ParserData_HelperRecurseStringAdd(&groupVariable, childTagToken);

    //check if removing
    if(config->load == ARC_False){
        /* ~ <groupArgs> ~ */
        childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 6);

        //<groupArgs> -> <whitespace> <variableLines> | LAMBDA
        if(childTagToken->token == NULL && ARC_Vector_GetSize(childTagToken->tagTokens) == 2){
            ARC_ParserTagToken *variableLines = (ARC_ParserTagToken *)ARC_Vector_Get(childTagToken->tagTokens, 1);
            ARC_ConfigData_RunVariableLinesTag(variableLines, config);

            //log error if it happens
            if(arc_errno != 0){
                ARC_DEBUG_LOG_ERROR("ARC_ConfigData_RunGroupTag(tagToken, config), config errored when trying to used parsed data for variable lines");
            }
        }

        //remove an empty hashtable if it is now empty
        if(ARC_Hashtable_GetSize(config->groups)){
            ARC_String_Destroy(groupVariable);
        }

        return;
    }

    //get the needed hashtable or create it from the groups hashtable
    ARC_Hashtable *groupHashtable = ARC_Hashtable_Get(config->groups, (void *)groupVariable->data);
    if(groupHashtable == NULL){
        //copy the string into a cstring that will be stored in the hashtable
        char *groupVariableCStr = malloc(sizeof(char) * (groupVariable->length + 1));
        strncpy(groupVariableCStr, groupVariable->data, groupVariable->length);
        groupVariableCStr[groupVariable->length] = '\0';

        //create the hashtable with the given group name key
        ARC_Hashtable_KeyCompareFn keyCompareFn = ARC_Config_HashtableKeyCompareFn;
        ARC_Hashtable_DestroyKeyValueFn groupDataDestroyKeyValueFn = ARC_Config_GroupDataHashtableDestroyKeyValueFn;
        ARC_Hashtable_Create(&groupHashtable, NULL, &keyCompareFn, &groupDataDestroyKeyValueFn);
        ARC_Hashtable_Add(config->groups, (void *)groupVariableCStr, (void *)groupHashtable);
    }

    //cleanup
    ARC_String_Destroy(groupVariable);

    //set the current group to the group just created or found
    config->currentGroup = groupHashtable;

    /* ~ <groupArgs> ~ */
    childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, 6);

    //<groupArgs> -> <whitespace> <variableLines> | LAMBDA
    if(childTagToken->token == NULL && ARC_Vector_GetSize(childTagToken->tagTokens) == 2){
        ARC_ParserTagToken *variableLines = (ARC_ParserTagToken *)ARC_Vector_Get(childTagToken->tagTokens, 1);
        ARC_ConfigData_RunVariableLinesTag(variableLines, config);

        //log error if it happens, but as setting the group back is the last thing we shouldn't return
        if(arc_errno != 0){
            ARC_DEBUG_LOG_ERROR("ARC_ConfigData_RunGroupTag(tagToken, config), config errored when trying to used parsed data for variable lines");
        }
    }

    /* ~ reset current group ~ */
    config->currentGroup = ARC_Hashtable_Get(config->groups, (void *)ARC_CONFIG_DEFAULT_GROUP);
}

//<language> -> <group> <language> | <variableLines> <language> | <whitespace>
void ARC_ConfigData_RunLanguageTag(ARC_ParserTagToken *tagToken, ARC_Config *config){
    //loop through the tags either going to the next language, group, or variable lines
    for(uint32_t index = 0; index < ARC_Vector_GetSize(tagToken->tagTokens); index++){
        ARC_ParserTagToken *childTagToken = (ARC_ParserTagToken *)ARC_Vector_Get(tagToken->tagTokens, index);

        switch(childTagToken->id){
            //recuse to run the next line
            case ARC_CONFIG_LANGUAGE:
                ARC_ConfigData_RunLanguageTag(childTagToken, config);
                continue;

            //recurse into a group tag
            case ARC_CONFIG_GROUP:
                ARC_ConfigData_RunGroupTag(childTagToken, config);
                if(arc_errno != 0){
                    ARC_DEBUG_LOG_ERROR("ARC_ConfigData_RunLanguageTag(tagToken, config), config errored when trying to used parsed data for a group");
                    return;
                }
                continue;

            //recurse through variable lines
            case ARC_CONFIG_VARIABLE_LINES:
                ARC_ConfigData_RunVariableLinesTag(childTagToken, config);
                ARC_ConfigData_RunGroupTag(childTagToken, config);
                if(arc_errno != 0){
                    ARC_DEBUG_LOG_ERROR("ARC_ConfigData_RunLanguageTag(tagToken, config), config errored when trying to used parsed data for variable lines");
                    return;
                }
                continue;

            //this is for whitespace and any oddities
            default:
                continue;
        }
    }
}

void ARC_ConfigData_CreateFn(void **data, ARC_ParserTagToken *parsedData, void *userData){
    *data = NULL;
    if(parsedData == NULL || userData == NULL){
        //TODO: error here?
        *data = NULL;
        return;
    }

    ARC_ConfigData_RunLanguageTag(parsedData, (ARC_Config *)userData);
}

void ARC_ConfigData_DestroyFn(void *data, ARC_Bool clear, void *userData){
    return;
}

void ARC_Config_Create(ARC_Config **config){
    *config = (ARC_Config *)malloc(sizeof(ARC_Config));

    /* ~ define the language as a string ~ */
    char *languageCString =
        "<language>      -> <group> <language> | <variableLines> <language> | <whitespace>\n"

        "<group>         -> <whitespace> <groupName> <whitespace> <variable> <whitespace> OPEN_CURLY_BRACE <groupArgs> <whitespace> CLOSE_CURLY_BRACE\n"
        "<groupName>     -> <variable>\n"
        "<groupArgs>     -> <whitespace> <variableLines> | LAMBDA\n"

        "<variableLines> -> <variableLine> <whitespace> <variableLines> | <variableLine>\n"
        "<variableLine>  -> <whitespace> <type> <whitespace> <variable> <whitespace> EQUAL <whitespace> <value> <whitespace> SEMICOLON\n"
        "<allowSpace>    -> SPACE <allowSpace> | TAB <allowSpace> | LAMBDA\n"

        "<type>          -> <variable>\n"
        "<value>         -> <variable> | <numberSign> | <string> | <nestedValue>\n"
        "<nestedValue>   -> OPEN_CURLY_BRACE <whitespace> <valueArgs> <whitespace> CLOSE_CURLY_BRACE\n"
        "<valueArgs>     -> <value> COMMA <valueArgs> | <value>\n"

        "<variable>      -> ALPHA_UPPER_CHAR <variableName> | ALPHA_LOWER_CHAR <variableName> | UNDERSCORE <variableName>\n"
        "<variableName>  -> <variableChar> <variableName> | LAMBDA\n"
        "<variableChar>  -> ALPHA_UPPER_CHAR | ALPHA_LOWER_CHAR | UNDERSCORE | NUMBER\n"

        "<string>        -> QUOTE <stringChars> QUOTE\n"
        "<stringChars>   -> <stringChar> <stringChars> | <escapeChar> <stringChars> | LAMBDA\n"
        "<stringChar>    -> TAB | SPACE | BANG | HASH | DOLLAR | PERCENT | AMPERSAND | SINGLE_QUOTE | OPEN_PAREN | CLOSE_PAREN | ASTERISK | PLUS | COMMA | MINUS | PERIOD | SLASH | NUMBER | COLON | SEMICOLON | LESS_THAN | GREATER_THAN | EQUAL | QUESTION_MARK | AT | ALPHA_UPPER_CHAR | OPEN_BRACKET | CLOSE_BRACKET | CARET | UNDERSCORE | GRAVE | ALPHA_LOWER_CHAR | OPEN_CURLY_BRACE | VERTICAL_LINE | CLOSE_CURLY_BRACE | TILDE\n"
        "<escapeChar>    -> BACKSLASH BACKSLASH | BACKSLASH QUOTE | BACKSLASH ALPHA_UPPER_CHAR | BACKSLASH ALPHA_LOWER_CHAR\n"

        "<numberSign>    -> MINUS <number> | <number>\n"
        "<number>        -> NUMBER <number> | NUMBER\n"

        "<whitespace>    -> SPACE <whitespace> | TAB <whitespace> | NEWLINE <whitespace> | LAMBDA\n";

    /* ~ define the language as a string ~ */
    ARC_String *languageString;
    ARC_String_CreateWithStrlen(&languageString, languageCString);

    /* ~ set config as userdata ~ */
    void *userdata = *config;

    /* ~ create the language ~ */
    ARC_ParserData_CreateFn  createCharFn  = ARC_ConfigData_CreateFn;
    ARC_ParserData_DestroyFn destroyCharFn = ARC_ConfigData_DestroyFn;
    ARC_Parser_CreateFromString(&((*config)->parser), languageString, ARC_Config_InitLexerRulesFn, ARC_Config_GetStringIdFn, &createCharFn, &destroyCharFn, userdata);

    /* ~ init types ~ */
    ARC_Hashtable_KeyCompareFn keyCompareFn = ARC_Config_HashtableKeyCompareFn;
    ARC_Hashtable_DestroyKeyValueFn typeDestroyKeyValueFn = ARC_Config_TypeHashtableDestroyKeyValueFn;
    ARC_Hashtable_Create(&((*config)->types), NULL, &keyCompareFn, &typeDestroyKeyValueFn);

    /* ~ init groups ~ */
    ARC_Hashtable_DestroyKeyValueFn groupDestroyKeyValueFn = ARC_Config_GroupHashtableDestroyKeyValueFn;
    ARC_Hashtable_Create(&((*config)->groups), NULL, &keyCompareFn, &groupDestroyKeyValueFn);

    //add the default/empty group into the groups
    ARC_Hashtable_DestroyKeyValueFn groupDataDestroyKeyValueFn = ARC_Config_GroupDataHashtableDestroyKeyValueFn;

    //copy empty group cstring (to be freed by hashtable on cleanup, passing directly would cause a segfault)
    char *emptyCStr = (char *)malloc(sizeof(char) * (strlen(ARC_CONFIG_DEFAULT_GROUP) + 1));
    strcpy(emptyCStr, ARC_CONFIG_DEFAULT_GROUP);

    //set the current group as empty, then add that into the groups hashtable
    ARC_Hashtable_Create(&((*config)->currentGroup), NULL, &keyCompareFn, &groupDataDestroyKeyValueFn);
    ARC_Hashtable_Add((*config)->groups, (void *)emptyCStr, (*config)->currentGroup);

    (*config)->load = ARC_True;

    //cleanup
    ARC_String_Destroy(languageString);
}

void ARC_Config_Destroy(ARC_Config *config){
    ARC_Parser_Destroy(config->parser);
    //NOTE: config->currentGroup does not need to be freed as it is stored in config->groups
    ARC_Hashtable_Destroy(config->groups);
    ARC_Hashtable_Destroy(config->types);
    free(config);
}

void ARC_Config_RegisterType(ARC_Config *config, ARC_String *typeName, ARC_ConfigType type){
    ARC_Config_RegisterTypeWithCStr(config, typeName->data, type);
}

void ARC_Config_RegisterTypeWithCStr(ARC_Config *config, const char *typeNameCStr, ARC_ConfigType type){
    //check if the type key already exists and error if it does
    if(ARC_Hashtable_Get(config->types, (void *)typeNameCStr) != NULL){
        arc_errno = ARC_ERRNO_EXISTS;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("ARC_Config_RegisterTypeWithCStr(config, typeName, type), type \"%s\" has already been registered", typeNameCStr);
        return;
    }

    //copy the string into a cstring for long term storage
    uint64_t typeNameCopyLength = strlen(typeNameCStr) + 1;
    char *typeNameCopy = (char *)malloc(sizeof(char) * typeNameCopyLength);
    strncpy(typeNameCopy, typeNameCStr, typeNameCopyLength);
    typeNameCopy[strlen(typeNameCStr)] = '\0';

    //copy the type for long term storage
    ARC_ConfigType *typeCopy = (ARC_ConfigType *)malloc(sizeof(ARC_ConfigType));
    *typeCopy = type;

    //add the type to a hashtable containing all the types
    ARC_Hashtable_Add(config->types, typeNameCopy, typeCopy);
}

void ARC_Config_SetGroup(ARC_Config *config, ARC_String *groupName){
    ARC_Config_SetGroupWithCStr(config, groupName->data);
}

void ARC_Config_SetGroupWithCStr(ARC_Config *config, const char *groupName){
    //try to get the current group
    void *currentGroup = ARC_Hashtable_Get(config->groups, (void *)groupName);

    //error if the current group does not exist
    if(currentGroup == NULL){
        arc_errno = ARC_ERRNO_NULL;
        ARC_DEBUG_LOG_ERROR_WITH_VARIABLES("ARC_Config_SetGroupWithCStr(config, groupName), no group with name \"%s\"", groupName);
        return;
    }

    //set the current group
    config->currentGroup = currentGroup;
}

void *ARC_Config_Get(ARC_Config *config, ARC_String *name){
    //check if the group separator exists
    uint64_t startSeparatorIndex = ARC_String_FindCStringWithStrlen(name, ARC_CONFIG_GROUP_SEPARATOR);
    if(startSeparatorIndex == ~(uint64_t)0){
        //use empty group
        config->currentGroup = ARC_Hashtable_Get(config->groups, (void *)ARC_CONFIG_DEFAULT_GROUP);

        //get the typeData and pass back the data without the cleanup function
        ARC_ConfigTypeData *typeData = (ARC_ConfigTypeData *)ARC_Hashtable_Get(config->currentGroup, (void *)name->data);
        if(typeData == NULL){
            return NULL;
        }

        return typeData->data;
    }

    //get the group
    startSeparatorIndex--;
    ARC_String *groupString;
    ARC_String_CopySubstring(&groupString, name, 0, startSeparatorIndex);

    //set the group
    config->currentGroup = ARC_Hashtable_Get(config->groups, (void *)groupString->data);

    //cleanup
    ARC_String_Destroy(groupString);

    //get the name
    ARC_String *nameString;
    startSeparatorIndex += strlen(ARC_CONFIG_GROUP_SEPARATOR);
    ARC_String_CopySubstring(&nameString, name, startSeparatorIndex, name->length - startSeparatorIndex);

    //this will either return the value or NULL
    ARC_ConfigTypeData *typeData = (ARC_ConfigTypeData *)ARC_Hashtable_Get(config->currentGroup, (void *)nameString->data);
    ARC_String_Destroy(nameString);
    if(typeData == NULL){
        return NULL;
    }

    return typeData->data;
}

void *ARC_Config_GetWithCStr(ARC_Config *config, const char *name){
    //create and copy into ARC_String
    ARC_String *nameString;
    ARC_String_CreateWithStrlen(&nameString, (char *)name);

    //get the return value
    void *returnValue = ARC_Config_Get(config, nameString);

    //cleanup
    ARC_String_Destroy(nameString);

    return returnValue;
}

void ARC_Config_LoadFromString(ARC_Config *config, ARC_String **string){
    config->load = ARC_True;
    ARC_Parser_Parse(config->parser, string);
}

void ARC_Config_LoadFromFile(ARC_Config *config, ARC_String *path){
    config->load = ARC_True;
    ARC_Parser_ParseFile(config->parser, path);
}

void ARC_Config_LoadFromFileWithCStr(ARC_Config *config, const char *path){
    config->load = ARC_True;

    ARC_String *pathString;
    ARC_String_CreateWithStrlen(&pathString, (char *)path);

    ARC_Parser_ParseFile(config->parser, pathString);

    ARC_String_Destroy(pathString);
}

void ARC_Config_UnloadFromString(ARC_Config *config, ARC_String **string){
    config->load = ARC_False;
    ARC_Parser_Parse(config->parser, string);
}

void ARC_Config_UnloadFromFile(ARC_Config *config, ARC_String *path){
    config->load = ARC_False;
    ARC_Parser_ParseFile(config->parser, path);
}