(*funkcija drugega prehoda*)
open Simtab
open SemanticAnalyzer
open Encoder

let drugiPrehod (ifl : lineSemantic list) (simtab : symtab) (lenProg : int) : string list = 
  let prviUkaz, ostaliUkazi = 
    match ifl with
    | [] -> failwith "empty code"
    | x :: xs -> x, xs
  in
    (*if Opcode == start then*)
  let objectCodeList = (*string list ki hrani vrstice objektne kode*) 
    if prviUkaz.opcode = START then
      getZaglavje prviUkaz lenProg
    else
      failwith "prvi ukaz ni START"
  in
  let instructionList : string list = [] in (*opcodeList shranjuje kode ukazov pretvorjene v stringe, ko se napolni se appenda k objectCodeList*)
  let rec loop (ostaliUkazi : lineSemantic list) (objectCodeList : string list) (startAddr : int) (instructionList : string list) : string list = 
    match ostaliUkazi with
    | [] -> () (*smo konec*)
    | x :: _ when x.opcode = END -> () (*TODO write last text record to object programm*)
      (*TODO write end record to object program*) 
      (*TODOwrite last listing line*)
    | x :: xs -> 
      (*pridobi začeten naslov TEXT vrstice, če je le ta prazna*)
      let newStartAddress = match instructionList with
      | [] -> begin match x.loc with None -> failwith "ukaz nima lokacije!" | Some l -> l end 
      | _ -> startAddr
      in
      match x.opcode with
      | COMMENT -> loop xs objectCodeList newStartAddress instructionList 
      | RESB | RESW -> (*dodamo trenutno TEXT vrstico k objektni kodi in inicializiramo novo*)
        let newTextLine = instructionList_to_objectCode (List.rev instructionList) newStartAddress in (*naredimo novo T vrstico*)
        begin
        match instructionList with (*če je instructionList prazen, npr. 2 zaporedna RESB ukaza, ne dodamo te prazne T vrstice v obj kodo*)
        | [] -> loop xs objectCodeList newStartAddress []
        | ntl -> loop xs (ntl :: objectCodeList) newStartAddress []
        end
      | _ -> (*if not comment or reserve*)
        let opcode = getOpcode x.opcode in
          (*if simbol na mestu opeanda*)
          let isSymbol, symbol = operand_is_symbol x.mnem in
          if isSymbol then
            let locSimbola = find_symbol tab symbol in 
            let opcode = create_opcode x.opcode locSimbola in
            (*TODO dodaj opcode v line, ce ni prostora dodaj line v file in naredi novega*) 
            ()
          else
            let opcode = create_opcode x.opcode (int_of_string symbol) in (*symbol je tukaj kar stevilska vrednost/register*)
            (*TODO dodaj opcode v line, ce ni prostora dodaj line v file in naredi novega*) 
            ()

  in loop ostaliUkazi objectCodeList startAddr instructionList