/*     Syntax Analyzer with Bison (3.8.2)     */
/*       The Translators - Spring 2025        */

// ----- THIS FILE MUST BE FORMATTED CORRECTLY FOR READABILITY ----- //

// ✏️ FORMATTING RULES:
// 1️⃣ Use 4 spaces for indentation.
// 2️⃣ Grammar rules (terminals and nonterminals) should always be on their own line.
// 3️⃣ Grammar rules and C-blocks should always begin 8 spaces in.
// 4️⃣ Rule end-markers (;, |) should always be 4 spaces in.
// 5️⃣ C-blocks should always be clearly defined and follow clang formatting rules.
// 6️⃣ 1-line if/for/while statements must be wrapped in curly braces.
// 7️⃣ Comments should always be above rules
// 8️⃣ DO NOT USE TABS. EVER.

// Please ask Scarlett if you are unsure of how to format something. Thanks! 😀

%{
    #include "../src/symbol_table.c"
    void yyerror(const char *err);
    extern FILE *asc_flag;
    extern bool tc_flag;
    int token_tracker;
    TableNode * tn;
    void error_type(TableNode * left, TableNode * right, const char *format, ...);
%}

%union {
    int integ;
    char* words;
    char letter;
    void* tn;
}

%locations


%type <integ> idlist
%type <tn> assignable
%type <tn> expression
%type <tn> constant
%type <tn> id_or_types
%type <tn> types
%type <tn> sblock
%type <tn> compound_statement
%type <tn> simple_statement
%type <tn> statement_list
%type <integ> argument_list
%type <integ> ablock
%token <words> ID       101
%token <tn> T_INTEGER        201
%token <tn> T_ADDRESS        202
%token <tn> T_BOOLEAN        203
%token <tn> T_CHARACTER      204
%token <tn> T_STRING         205
%token <integ> C_INTEGER        301
%token <tn> C_NULL           302
%token <tn> C_CHARACTER      303
%token <tn> C_STRING         304
%token <tn> C_TRUE           305
%token <tn> C_FALSE          306
%token WHILE            401
%token IF               402
%token THEN             403
%token ELSE             404
%token TYPE             405
%token FUNCTION         406
%token RETURN           407
%token EXTERNAL         408
%token AS               409
%token L_PAREN          501
%token R_PAREN          502
%token L_BRACKET        503
%token R_BRACKET        504
%token L_BRACE          505
%token R_BRACE          506
%token SEMI_COLON       507
%token COLON            508
%token COMMA            509
%token ARROW            510
%token MUL              603
%token DIV              604
%token REM              605
%token ADD              601
%token LESS_THAN        606
%token EQUAL_TO         607
%token AND              610
%token OR               611
%token ASSIGN           608
%token SUB_OR_NEG       602
%token NOT              609
%token DOT              612
%token RESERVE          613
%token RELEASE          614
%token COMMENT          700

//precedence order
%left ASSIGN
%left OR
%left AND
%left EQUAL_TO
%left LESS_THAN
%left ADD SUB_OR_NEG
%left MUL DIV REM
%precedence NOT
%precedence UMINUS
%precedence DOT
%precedence RESERVE RELEASE


%%

program:
        prototype_or_definition_list
    ;



prototype_or_definition_list:
        prototype prototype_or_definition_list
    |   definition prototype_or_definition_list
    |   prototype
    |   definition
    ;



prototype:
        L_PAREN EXTERNAL R_PAREN FUNCTION ID COLON ID;



definition:
        TYPE ID COLON
        {

            printdebug("Currently see a record definition for %s", $2);
            tn = CreateEntry(getAncestor(cur),TYPE_RECORD_TYPE, recprime, $2, CreateRecordInfo(0, cur = CreateScope(cur, 0, 0)));
            printdebug("Created a new scope");
            //if (look_up(cur, $2) == undefined) {
            //    printdebug("rec not found");
            //}
        }
        dblock
        {
            //We are scanning through the dblock scope to get the length of the dblock (num of elements) from getRecSize
            //and then putting it in the entry that we created above.
            setRecSize(look_up(getParent(cur), $2), getRecSize(cur));
            //putting in all the offsets
            setRecOffsetInfo(cur, look_up(getParent(cur),$2));
            printdebug("Moving up a scope after seeing a record definition");
            cur = getParent(cur);
        }

    |   TYPE ID COLON C_INTEGER ARROW id_or_types 
        {
            printdebug("Currently see a array definition of name %s,storing type %s, of dimensions %d", $2, getName((TableNode*)$6), $4); 
            CreateEntry(cur,TYPE_ARRAY_TYPE, arrayprim, $2, CreateArrayInfo($4, (TableNode*)$6));
            printdebug("%sID: %s, dimensions: %d, typeOfArray: %s", COLOR_GREEN, $2, $4, getName((TableNode*)$6));
        }
    
    |   function_declaration
    
    |   TYPE ID COLON id_or_types ARROW id_or_types
        {
            printdebug("Currently see a function type definition of name %s,parameter type %s, of return type %s", $2, getName((TableNode*)$4), getName((TableNode*)$6));
            CreateEntry(cur,TYPE_FUNCTION_TYPE,funtypeprime,$2,CreateFunctionTypeInfo((TableNode*)$4 ,(TableNode*)$6));
        }  
    
    | ID {
        printdebug("see function def rule 1\n");
        TableNode *node = table_lookup(getAncestor(cur), $1);
        if (node == undefined) {
            error_type(undefined, undefined, "Undefined node declared.");
        }else if(getAdInfoType(node) != TYPE_FUNCTION_DECLARATION){
            error_type(undefined, undefined, "Not a valid function declaration.");
        }  
        else {
            printdebug("setting as keyword to true");
            setStartLine(node, @1.first_line);
            setAsKeyword(node, true); 
        }
        cur = CreateScope(cur, 0, 0);
        printdebug("Created a new scope");
        } L_PAREN {
            TableNode * parameter = getParameter(getTypeEntry(table_lookup(getAncestor(cur), $1)));
            //TableNode *parameter = getParameter(table_lookup(getAncestor(cur), getType(table_lookup(getAncestor(cur), $1))));
            printdebug("type of parameter: %s", getName(parameter));
        if (parameter == undefined) {
            error_type(undefined, undefined, "Undefined parameter in function definition.");
        }else if(getAdInfoType(parameter) != TYPE_RECORD_TYPE){
            int type_of_param_type = getAdInfoType(parameter);//this is an enum value defined in symbol_table.h
        if( type_of_param_type == TYPE_UNDEFINED
            || type_of_param_type == TYPE_FUNCTION_DECLARATION
            || type_of_param_type == TYPE_ARRAY
            || type_of_param_type == TYPE_PRIMITIVE
            || type_of_param_type == TYPE_ALL_ELSE 
            || type_of_param_type == TYPE_SYSTEM_DEFINED
            || type_of_param_type == TYPE_RECORD
            || type_of_param_type == TYPE_STRING){ // note that strings are actually arrays so this is unused 
            error_type(parameter, undefined, "Invalid type (%s) of parameter in function definition.", getAdInfo(parameter));
            type_of_param_type = TYPE_UNDEFINED; // setting tag as undefined in these cases
            }
        if(type_of_param_type == TYPE_UNDEFINED){
            CreateEntry(cur,type_of_param_type, undefined, NULL, NULL);
        } else {
            if(type_of_param_type == TYPE_FUNCTION_TYPE){
                    CreateEntry(cur, TYPE_FUNCTION_DECLARATION, parameter,NULL, getAdInfo(parameter));
                }
            if(type_of_param_type == TYPE_ARRAY_TYPE){
                CreateEntry(cur, TYPE_ARRAY, parameter,NULL, getAdInfo(parameter));
                }
            if(type_of_param_type == TYPE_PRIMITIVE_TYPE){
                CreateEntry(cur, TYPE_PRIMITIVE, parameter,NULL, getAdInfo(parameter));
                }
            }
        } else {
            printdebug("record found");
            for (TableNode* entry = getFirstEntry(getRecList(parameter)); entry!= NULL; entry = getNextEntry(entry)){
                int type_of_param_type = getAdInfoType(entry);
                if( type_of_param_type == TYPE_UNDEFINED
                    || type_of_param_type == TYPE_FUNCTION_TYPE
                    || type_of_param_type == TYPE_ARRAY_TYPE
                    || type_of_param_type == TYPE_PRIMITIVE_TYPE
                    || type_of_param_type == TYPE_ALL_ELSE 
                    || type_of_param_type == TYPE_SYSTEM_DEFINED
                    || type_of_param_type == TYPE_RECORD_TYPE
                    || type_of_param_type == TYPE_STRING){ // note that strings are actually arrays so this is unused 
                    error_type(entry, undefined, "Invalid type (%s) of parameter in function definition.", getAdInfo(entry));
                    type_of_param_type = TYPE_UNDEFINED; // setting tag as undefined in these cases
                }else{
                    printdebug("type of parameter correctly being passed in to AS function definition is %s which is valid", getType(entry));
                }
                if(type_of_param_type == TYPE_UNDEFINED){
                    printdebug("undefined type of parameter inside record");
                    CreateEntry(cur,type_of_param_type, undefined, NULL, NULL);
                } else {
                    if(type_of_param_type == TYPE_FUNCTION_DECLARATION){
                        printdebug("function declaration of parameter inside record");
                    CreateEntry(cur, TYPE_FUNCTION_DECLARATION, getTypeEntry(entry),NULL, getAdInfo(entry));
                    }
                    if(type_of_param_type == TYPE_ARRAY){
                        printdebug("array type of parameter inside record");
                    CreateEntry(cur, TYPE_ARRAY, getTypeEntry(entry),NULL, getAdInfo(entry));
                    }
                    if(type_of_param_type == TYPE_PRIMITIVE){
                        printdebug("primitive type of parameter inside record");
                    CreateEntry(cur, TYPE_PRIMITIVE, getTypeEntry(entry),NULL, getAdInfo(entry));
                    }          
                            /*printdebug("creating entry of type %s for function", getType(entry));
                            CreateEntry(cur, getTypeEntry(entry), "undefined", NULL);*/
                }
            }
            }
            //counter = 0;
            printdebug("Created a new scope after seeing a function definition");
        } idlist R_PAREN ASSIGN sblock  {
            TableNode *expected = getReturn(getTypeEntry(look_up(cur, $1)));
            if ($8 == undefined) {
                error_type(undefined, undefined, "Expected %s as return type but got undefined (possibly NULL). Differing return types in function.", getName(expected));
            } else if ($8 != expected) {
                error_type(undefined, undefined, "Expected %s as return type but got %s. Differing return types in function.", getName(expected), getName($8));
            } else {
                printdebug("CORRECT RETURN TYPE!!!");
            }
        }

          ;

function_declaration:
        FUNCTION ID COLON ID
        {   
            if(getAdInfoType(look_up(cur, $4))==TYPE_FUNCTION_TYPE){
            CreateEntry(cur,TYPE_FUNCTION_DECLARATION, look_up(cur, $4), $2, CreateFunctionDeclarationInfo(-1, false));
        }
            else{
                error_type(undefined, undefined, "Function declatation (%s) is not a valid function type", $2);
                CreateEntry(cur,TYPE_FUNCTION_DECLARATION, look_up(cur, $4), $2, CreateFunctionDeclarationInfo(-1, false));

            }
        }

    |   EXTERNAL FUNCTION ID COLON ID
        {   
            if(getAdInfoType(look_up(cur, $5))==TYPE_FUNCTION_TYPE){
            CreateEntry(cur,TYPE_FUNCTION_DECLARATION, look_up(cur, $5), $3, CreateFunctionDeclarationInfo(-1, false));
        }
            else{
                error_type(undefined, undefined, "Function declatation (%s) is not a valid function type", $3);
                CreateEntry(cur,TYPE_FUNCTION_DECLARATION, look_up(cur, $5), $3, CreateFunctionDeclarationInfo(-1, false));

            }
        }
    ;



idlist:
        ID
        {
            printdebug("idlist rule 1 ID: %s", $1);
            TableNode *entry = getFirstEntry(cur);
            while((getName(entry) != getName(undefined))){
                entry = getNextEntry(entry);
            }
            if (entry == NULL){
                printdebug("mismatch in number of parameters passed to function");
            }
            else if(entry->theName == NULL){
                addName(entry, $1);
                printdebug("name added to entry of type %s is %s in function parameter scope",getType(entry), $1);
            } else {
                printdebug("undefined types passed in to function scope. Improper.");
                addName(entry, $1);
            }
            printTableNode(entry);
            //while (strcmp(getName(entry),"undefined") != 0) {
            //    entry = getNextEntry(entry);
            //}
            //if (getNextEntry(entry) == NULL) {
            //    printdebug("too many parameters at line %d column %d", @1.first_line, @1.first_column);
            //}
            //addName(entry, $1);
            //printdebug("name added to entry is %s", $1);
            //printTableNode(entry);
	    }
        COMMA idlist
        {
            $$ = $4 + 1;
        }
    
    |   ID
        {   printdebug("idlist rule 2 ID: %s", $1);
            TableNode *entry = getFirstEntry(cur);
            while((getName(entry) != getName(undefined))){
                entry = getNextEntry(entry);
            }
            if (entry == NULL){
                printdebug("mismatch in number of parameters passed to function");
            }
            else if(entry->theName == NULL){
                addName(entry, $1);
                printdebug("name added to entry of type %s is %s in function parameter scope",getType(entry), $1);
            } else {
                printdebug("undefined types passed in to function scope. Improper.");
                addName(entry, $1);
            }
            printTableNode(entry);
            printdebug("Name of entry is now %s", getName(entry));
            printdebug("Type of entry is %s", getType(entry));
            printdebug("tag is %d", getAdInfoType(entry));
        }
    ;


sblock:
        L_BRACE
        {
            if (getLine(cur) != 0) {
                cur = CreateScope(cur,@1.first_line,@1.first_column);
                printdebug("Created a new scope");
            } else {
                setLineNumber(cur, @1.first_line);
                setColumnNumber(cur,@1.first_line);
            }
        }
        statement_list
        {
            //$<tn>$ = $3;
            printdebug("Moving up a scope after seeing sblock");
            cur = getParent(cur);
        }
        R_BRACE
        {$$ = $3;}
        
    |   L_BRACE
        {
            if (getLine(cur) != 0) {
                cur = CreateScope(cur,@1.first_line,@1.first_column);
                printdebug("Created a new scope when seeing an L brace");
            } else {
                setLineNumber(cur, @1.first_line);
                setColumnNumber(cur,@1.first_line);
                printdebug("Did not create a new scope when saw L Brace, set line number to %d", @1.first_line);
            }
        }
        dblock
        {
            printdebug("seen sblock with dblock");
        }
        statement_list
        {
            printdebug("Moving up a scope after seeing sblock with dblock");
            cur = getParent(cur);
            //$<tn>$ = $5;
            
        } 
        R_BRACE
        {$$ = $5;}
    ;



dblock:

        L_BRACKET 
        {
            if (getLine(cur) == 0) {
                setLineNumber(cur, @1.first_line); 
                setColumnNumber(cur,@1.first_line);
                printdebug("Did not create a new scope when saw dblock, set line number to %d instead", @1.first_line);
            } else{
                //cur = CreateScope(cur,@1.first_line,@1.first_column); // <----- What is this?
                printdebug("Created a new scope when seeing a dblock");
            }
        } 
        declaration_list R_BRACKET;



declaration_list:
        declaration SEMI_COLON declaration_list
    |   declaration
    ;



declaration:
        id_or_types COLON ID 
        {
            printdebug("ID/TYPE: %s,  ID: %s", getName((TableNode*)$1), $3) ;
            int d = getAdInfoType((TableNode*)$1);
            if(d == TYPE_UNDEFINED) {
                error_type(undefined, undefined, "Undefined type passed in declaration list");
                CreateEntry(cur,d,(TableNode*)$1,$3,getAdInfo((TableNode*)$1)); 
            }
            else if(d == TYPE_FUNCTION_TYPE) {
                printdebug("invalid (function) type passed in declaration list in dblock", @2.first_line, @2.first_column);
                d = TYPE_FUNCTION_DECLARATION;
                CreateEntry(cur,d,(TableNode*)$1,$3,getAdInfo((TableNode*)$1)); 
            }
            else if(d == TYPE_ARRAY_TYPE){
                printdebug("array variable at line %d and column %d", @2.first_line, @2.first_column);
                d = TYPE_ARRAY;
                CreateEntry(cur,d,(TableNode*)$1,$3,getAdInfo((TableNode*)$1)); 
            }
            else if(d == TYPE_RECORD_TYPE){
                printdebug("record variable at line %d and column %d", @2.first_line, @2.first_column);
                d = TYPE_RECORD;
                CreateEntry(cur,d,(TableNode*)$1,$3,getAdInfo((TableNode*)$1)); 
            }
            else if(d == TYPE_PRIMITIVE_TYPE){
                printdebug("primitive variable at line %d and column %d", @2.first_line, @2.first_column);
                d = TYPE_PRIMITIVE;
                CreateEntry(cur,d,(TableNode*)$1,$3,getAdInfo((TableNode*)$1)); 
            }else {
                error_type(undefined, undefined, "Invalid type passed in declaration list.");
                CreateEntry(cur,d,(TableNode*)$1,$3,getAdInfo((TableNode*)$1)); 
            }
        }
    ;



id_or_types:
        ID
        {
            printdebug("string of id is %s in ID pattern of id_or_type rule.", $1);
            $$ = table_lookup(getAncestor(cur), $1);
        }
    
    |   types
        {
            printdebug("string of type is %s in types pattern of id_or_type rule.",getName((TableNode*)$1));
            $$ = (TableNode*)$1;
        }
    ;



statement_list:
compound_statement statement_list {
    if ($1 == undefined && $2 != undefined) {
                $$ = $2;
            } else if ($1 != undefined && $2 == undefined) {
                $$ = $1;
            } else if ($1 == $2) {
                $$ = $1;
            } else {
                printdebug("differing return types within same function at line %d, column %d", @1.first_line, @1.first_column);
                $$ = undefined;
            }
}
        |   compound_statement {
            $$ = $1;
        } 
        |   simple_statement SEMI_COLON statement_list{
            if ($1 == undefined && $3 != undefined) {
                $$ = $3;
            } else if ($1 != undefined && $3 == undefined) {
                $$ = $1;
            } else if ($1 == $3) {
                $$ = $1;
            } else {
                printdebug("differing return types within same function at line %d, column %d", @1.first_line, @1.first_column);
                $$ = undefined;
            }
        }
        |   simple_statement SEMI_COLON {
            $$ = $1;
        }
    ;



compound_statement:
WHILE L_PAREN expression R_PAREN sblock {
    $$ = $5;
}
    |   IF L_PAREN expression R_PAREN THEN sblock ELSE sblock {
            if ($6 == undefined && $8 != undefined) {
                $$ = $8;
            } else if ($6 != undefined && $8 == undefined) {
                $$ = $6;
            } else if ($6 == $8) {
                $$ = $6;
            } else {
                printdebug("differing return types within same function at line %d, column %d", @1.first_line, @1.first_column);
                $$ = undefined;
            }
        }
        |   sblock {
            $$ = $1;
        }
    ;



simple_statement:
        assignable ASSIGN expression 
         {  printdebug("simple statement");   
            TableNode* node;
            if((getAdInfoType((TableNode*)$1) == TYPE_FUNCTION_DECLARATION)||
                (getAdInfoType((TableNode*)$1) == TYPE_ARRAY)||
                (getAdInfoType((TableNode*)$1) == TYPE_RECORD)||
                (getAdInfoType((TableNode*)$1) == TYPE_PRIMITIVE)){
            
                    node = ((TableNode*)$1);
                } else{
                    error_type(undefined, undefined, "Invalid type passed to assignable.");
                    node = undefined;
                }


            if(getAdInfoType(node) == getAdInfoType((TableNode*)$3)){
                //EMIT ASSIGN INSTRUCTION HERE
                printdebug("%s[☺] Passed type check; %s = %s", COLOR_GREEN, getName(node), getName((TableNode*)$3));
            } else {
                error_type(node, (TableNode*)$3, "");
            }

            $$ = undefined;
        }


|   RETURN expression {$$ = getTypeEntry((TableNode*)$2);}
    ;



rec_op:
        DOT



ablock:
        L_PAREN argument_list R_PAREN
        {
            $$ = $2;
            printdebug("ablock is %d", $$);
        }
    ;



argument_list:
        //NEED TO EMIT PARAMETERS HERE. MAYBE USE STACK STRUCTURE
        expression COMMA argument_list
        {
            CreateEntry(cur,getAdInfoType((TableNode*)$1), (TableNode*)$1, getName((TableNode*)$1), NULL);
            $$ = $3 + 1;
            printdebug("[ARGUMENT_LIST] argument list is %d", $$);
        }

    |   expression
        {
            CreateEntry(cur,getAdInfoType((TableNode*)$1),(TableNode*)$1, getName((TableNode*)$1), NULL); 
            $$ = 1; printdebug("[ARGUMENT_LIST] argument list is %d", $$);
        }
    ;


// will ALWAYS be a TYPE
expression:
        constant
        {
            printdebug("constant expression");
            $$ = (TableNode*)$1;
        }

    |   SUB_OR_NEG expression %prec UMINUS
        {
            printdebug("negative expression");
            if(getTypeEntry((TableNode*)$2) == integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of unary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$2), integ, "");
            }
        }

    |   NOT expression
        {
            printdebug("not expression");
            if(getTypeEntry((TableNode*)$2) == boo) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of unary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$2), boo, "");
            }
        }

    |   expression ADD expression
		{
            printdebug("add expression");
            if((getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of binary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression SUB_OR_NEG expression
        {
            printdebug("sub or neg expression");
            if((getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of binary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression MUL expression
        {
            printdebug("multiply expression");
            if((getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of binary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression DIV expression
        {
            printdebug("divide expression");
            if((getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of binary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression REM expression
        {
            printdebug("remainder expression");
            if((getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of binary operation
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression AND expression
        {
            printdebug("AND");
            if((getTypeEntry((TableNode*)$1)==getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == boo) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of comparison
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression OR expression
		{
            printdebug("OR");
            if((getTypeEntry((TableNode*)$1)==getTypeEntry((TableNode*)$3)) && getTypeEntry((TableNode*)$1) == boo) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of comparison
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }
                    
    |   expression LESS_THAN expression 
		{
            printdebug("less than expression");
            if(getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3) && getTypeEntry((TableNode*)$1)==integ) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of comparison
                $$ = node;
            } else {
                $$=undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   expression EQUAL_TO expression
        {
            printdebug("equals check expression");
            if(getTypeEntry((TableNode*)$1) == getTypeEntry((TableNode*)$3) && getTypeEntry((TableNode*)$1) != undefined) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //result of compariosn
                $$ = node;
                
            } else {
                $$ = undefined;
                error_type(getTypeEntry((TableNode*)$1), getTypeEntry((TableNode*)$3), "");
            }
        }

    |   assignable
        {
            $$ = $1;
        }
    
    |   L_PAREN expression R_PAREN
        {
            printdebug("paren expression. current type is %s",getType((TableNode*)$2));
            $$=$2;
        }

    |   memOp assignable
        {
            int d = getAdInfoType((TableNode*)$2);
            if(d == TYPE_ARRAY ||d == TYPE_RECORD) {
                char* temp = temp_var_gen();
                TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, addr, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                $$ = node;
            } else {
                error_type(undefined, undefined, "Invalid memOp expression (%s).", getName((TableNode*)$2));
                $$=undefined;
            }
        }
    
    ;

//UPDATED $$ for tablenodes to this point

// prolly right, check back with me later
// add array case
// include type check for ablock in arrays - ablock is always the int of the elements in array/rec
assignable:
        ID 
        {
            TableNode* pass = look_up(cur,$1);
            $$ = pass; 
            printdebug("[ASSIGNABLE - RULE 1] assignable = type: %s | ID = %s", getType(pass), getName(pass));
        }

    |   assignable 
        {
            printdebug("%sBeginning rule 2 of assignable.", COLOR_CYAN);
            cur = CreateScope(cur, -1,-1);
        }
        //we have to consider emmissions in ablocks
        ablock 
        {
            //int type = getAdInfoType(look_up(getParent(cur), getName((TableNode*)$1)));
            int type = getAdInfoType(getTypeEntry((TableNode*)$1));
            printdebug("%stype is %d", COLOR_PURPLE, type);
            printdebug("%s", getName((TableNode*)$1));
              
            if (type == TYPE_FUNCTION_TYPE) {
                printdebug("%sEntering function call", COLOR_LIGHTGREEN);
                if (look_up(getParent(cur), getType((TableNode*)$1))->additionalinfo->FunDecAdInfo->regularoras) {
                    printdebug("as function");
                    //char *funtype = getType(look_up(cur, $1));
                    //printdebug("%s", getType(look_up(cur, getName((TableNode*)$1))));



                    TableNode * typeNode = getTypeEntry((TableNode*)$1);
                    TableNode *param = getParameter(typeNode);
                    printTableNode(param);

                    if (getAdInfoType(param) == TYPE_RECORD_TYPE) {
                        SymbolTable *recList = getRecList(param);
                        TableNode *lastCheckedRef = getFirstEntry(recList);
                        TableNode *lastCheckedAct = getFirstEntry(cur);
                        while (getNextEntry(lastCheckedRef) != NULL) {
                            lastCheckedRef = getNextEntry(lastCheckedRef);
                        }

                        if ($3 != getRecLength(param)) {
                            printdebug("expected %d arguments but got %d", getRecLength(param), $3);
                        }
                        //this isn't very efficient, but will hopefully work
                        while (lastCheckedAct != NULL && lastCheckedRef != NULL) {
                            if (getTypeEntry(lastCheckedRef) != getTypeEntry(lastCheckedAct)) {
                                printdebug("expected %s. expression in function call got %s. at line %d and column %d",getType(lastCheckedRef), getName(lastCheckedAct), @3.first_line, @3.first_column);
                               
                            }
                            lastCheckedAct = getNextEntry(lastCheckedAct);
                            TableNode *tn = getFirstEntry(recList);
                            
                            if (tn != lastCheckedRef) {
                                while (getNextEntry(tn) != lastCheckedRef) {
                                    tn = getNextEntry(tn);
                                }
                                lastCheckedRef = tn;
                            } else {break;}
                        }
                    } else {
                        if (strcmp(getName(param), getName(getFirstEntry(cur))) != 0) {
                            printdebug("expected %s expression in function call but got %s", getName(param), getName(getFirstEntry(cur)));
                        }

                        if (getNextEntry(getFirstEntry(cur)) != NULL) {
                            printdebug("expected 1 parameter, but got multiple in function call");
                        }
                    }
                } else {
                    char *expected = getName(getParameter(look_up(getParent(cur), getType((TableNode*)$1))));
                    char *actual = getType(getFirstEntry(cur));
                    if (strcmp(expected, actual) != 0) {
                        printdebug("expected %s expression in function call but got %s at line %d and column %d",expected, actual, @3.first_line, @3.first_column);
                    }
                    if ($3 != 1) {
                        printdebug("expected 1 argument but got %d", $3);
                    }
                }
                printTableNode(getReturn(getTypeEntry((TableNode*)$1)));
                //
                char* temp = temp_var_gen();
                TableNode* typeNode2 = getReturn(getTypeEntry($1));
                int t = -1;
                if(getAdInfoType(typeNode2) == TYPE_PRIMITIVE_TYPE){
                    t = TYPE_PRIMITIVE;
                }
                else if(getAdInfoType(typeNode2) == TYPE_ARRAY_TYPE){
                    t = TYPE_ARRAY;
                }
                else if(getAdInfoType(typeNode2) == TYPE_RECORD_TYPE){
                    t = TYPE_RECORD;
                }
                else if(getAdInfoType(typeNode2) == TYPE_FUNCTION_TYPE){
                    t = TYPE_FUNCTION_DECLARATION;
                }else{
                    t= TYPE_UNDEFINED;
                    printdebug("CHANGE ME [TYPE CHECK] Undefined type stored in record. improper.");
                }
                TableNode* node = CreateEntry(cur,t, typeNode2, temp, NULL);
                $$ = node;
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK for function call)
                printdebug("[ASSIGNABLE - RULE 2] assignable = type: %s | name_func = %s", getName(typeNode2), getName((TableNode*)$1));
            
            } else if (type == TYPE_ARRAY_TYPE) {
                printdebug("%sEntering array call", COLOR_LIGHTGREEN);
                if (getNumArrDim(look_up(getParent(cur), getType((TableNode*)$1))) != $<integ>2) {
                    printdebug("expected %d arguments but had %d at line %d and column %d\n", getNumArrDim(look_up(cur, getName((TableNode*)$1))), $<integ>2, @2.first_line, @2.first_column);
                }

                char* temp = temp_var_gen();
                TableNode* typeNode2 = getArrType(look_up(getAncestor(cur), getType((TableNode*)$1)));
                int t = -1;
                if(getAdInfoType(typeNode2) == TYPE_PRIMITIVE_TYPE){
                    t = TYPE_PRIMITIVE;
                }
                else if(getAdInfoType(typeNode2) == TYPE_ARRAY_TYPE){
                    t = TYPE_ARRAY;
                }
                else if(getAdInfoType(typeNode2) == TYPE_RECORD_TYPE){
                    t = TYPE_RECORD;
                }
                else if(getAdInfoType(typeNode2) == TYPE_FUNCTION_TYPE){
                    t = TYPE_FUNCTION_DECLARATION;
                }else{
                    t= TYPE_UNDEFINED;
                    printdebug("CHANGE ME [TYPE CHECK] Undefined type stored in record. improper.");
                }
                TableNode* node = CreateEntry(cur,t, typeNode2, temp, NULL);
                //emit assign here
                //emit_array_access(char* node, char* array, ...)
                $$ = node;
                printdebug("[ASSIGNABLE - RULE 2] assignable = type: %s | name_func = %s", getType((TableNode*)$1), getName((TableNode*)$1));
            }
            cur = getParent(cur);
        }

    |   assignable rec_op ID 
        {   
            if(getAdInfoType((TableNode*)$1) != TYPE_RECORD_TYPE){
                printdebug("CHANGE ME [TYPE CHECK]Invalid type passed to record access");
            }
            else if(undefined != table_lookup(getRecList(table_lookup(getAncestor(cur), getName(getTypeEntry((TableNode*)$1)))), $3)) {

                TableNode* type = table_lookup(getRecList(table_lookup(getAncestor(cur), getName(getTypeEntry((TableNode*)$1)))), $3);
                char* temp = temp_var_gen();
                int t = -1;
                if(getAdInfoType(type) == TYPE_PRIMITIVE_TYPE){
                    t = TYPE_PRIMITIVE;
                }
                else if(getAdInfoType(type) == TYPE_ARRAY_TYPE){
                    t = TYPE_ARRAY;
                }
                else if(getAdInfoType(type) == TYPE_RECORD_TYPE){
                    t = TYPE_RECORD;
                }
                else if(getAdInfoType(type) == TYPE_FUNCTION_TYPE){
                    t = TYPE_FUNCTION_DECLARATION;
                }else{
                    t= TYPE_UNDEFINED;
                    printdebug("CHANGE ME [TYPE CHECK] Undefined type stored in record. improper.");
                }

                TableNode* node = CreateEntry(cur,t, type, temp, NULL);
                //NOTE ADD ASSIGNMENT EMIT HERE (MIGHT NEED TO PUSH TO STACK)
                //emit_field_access(char* node, char* record, $3)  
                $$=node;
            }else{
                printdebug("CHANGE ME [TYPE CHECK] undefined type (Field Access Lookup failed)");
                $$=undefined;
            } 
            printdebug("[ASSIGNABLE - RULE 3] record = name: %s | field = %s", getName((TableNode*)($1)), getName((TableNode*)$3));
        }

    ;



memOp:
        RESERVE 
        {
            printdebug("reserve expression");
        }
        
    |   RELEASE
        {
            printdebug("release expression");
        }

    ;


constant:
        C_STRING
        {
            char* temp = temp_var_gen();
            TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, stri, temp, NULL);
            emit_assignment(node, tn_or_const(STRING,$1));
            printdebug("string of C_STRING in constant is %s", $1);
            $$ = node;
        }

    |   C_INTEGER
        {
            char* temp = temp_var_gen();
            TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, integ, temp, NULL);
            emit_assignment(node, tn_or_const(INTEGER,&$1));
            printdebug("number of C_INTEGER in constant is %d", $1);
            $$ = node;
        }
    
    |   C_NULL
        {
            char* temp = temp_var_gen();
            TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, addr, temp, NULL);
            emit_assignment(node, tn_or_const(ADDRESS,$1));
            printdebug("string of C_NULL in constant is NULL");
            $$ = node;
        }
    
    |   C_CHARACTER
        {
            char* temp = temp_var_gen();
            TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, chara, temp, NULL);
            emit_assignment(node, tn_or_const(CHARACTER,&$1));
            printdebug("string of C_CHARACTER in constant is %s",$1);
            $$ = node;
        }
    
    |   C_TRUE
        {
            char* temp = temp_var_gen();
            TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
            uint_least8_t b = 1;
            emit_assignment(node, tn_or_const(BOOLEAN,&b));
            printdebug("string of C_TRUE in constant is true");
            $$ = node;
        }
    
    |   C_FALSE
        {
            char* temp = temp_var_gen();
            TableNode* node = CreateEntry(cur,TYPE_PRIMITIVE, boo, temp, NULL);
            uint_least8_t b = 0;
            emit_assignment(node, tn_or_const(BOOLEAN,&b));
            printdebug("string of C_FALSE in constant is false");
            $$ = node;
        }
    
    ;



types:	
        T_INTEGER
        {
            $$ = $1;
            printdebug("string of T_INTEGER in types is %s",getName((TableNode*)$1));
        }
    
    |   T_ADDRESS
        {
            $$ = $1;
            printdebug("string of T_ADDRESS in types is %s",getName((TableNode*)$1));
        }
    
    |   T_CHARACTER
        {
            $$ = $1;
            printdebug("string of T_CHARACTER in types is %s",getName((TableNode*)$1));
        }
    
    |   T_BOOLEAN
        {
            $$ = $1;
            printdebug("string of T_BOOLEAN in types is %s",getName((TableNode*)$1));
        } 
    
    ;

%%



void error_type(TableNode * left, TableNode * right, const char *format, ...) {
    int line = yylloc.first_line;
    int column = yylloc.first_column;

    if (tc_flag) {
        yyerror("");
        if (strcmp(format, "") == 0) {
            if (asc_flag != NULL) {
                fprintf(asc_flag, "(%d:%d) ** TYPE ERROR: %s != %s\n", line, column, getName(left), getName(right));
            } else {
                fprintf(stderr, "%s(%d:%d) ** TYPE ERROR%s: %s%s %s!= %s%s\n",
                    COLOR_RED, line, column, COLOR_WHITE, COLOR_YELLOW, getName(left), COLOR_WHITE, COLOR_YELLOW, getName(right), COLOR_WHITE);
            }
        } else {
            if (asc_flag != NULL) {
                fprintf(asc_flag, "(%d:%d) ** TYPE ERROR: ", line, column);
                va_list args;
                va_start(args, format);
                vfprintf(asc_flag, format, args);
                va_end(args);
                fprintf(asc_flag, "\n");
            } else {
                fprintf(stderr, "%s(%d:%d) ** TYPE ERROR%s: %s", COLOR_RED, line, column, COLOR_WHITE, COLOR_YELLOW);
                va_list args;
                va_start(args, format);
                vfprintf(stderr, format, args);
                va_end(args);
                fprintf(stderr, "%s\n", COLOR_WHITE);
            }
        }
    }
}

void yyerror(const char *err) {
    int line = yylloc.first_line;
    int column = yylloc.first_column;
    
    // Grammar Fallback Case
    if (strcmp(err, "syntax error") == 0) {
        if (asc_flag != NULL) {
            fprintf(asc_flag, "(%d:%d) ** SYNTAX ERROR: Incorrect syntax at token '%s'\n", line, column, yytext);
        }
        else {
            fprintf(stderr, "%s(%d:%d) ** SYNTAX ERROR%s: Incorrect syntax at token '%s%s%s'\n",
                COLOR_RED, line, column, COLOR_WHITE, COLOR_YELLOW, yytext, COLOR_WHITE);
        }
    }
}