-- TIA Portal built-in instructions for SCL LSP
-- Defines functions, function blocks, data types, and their parameters

local M = {}

-- Built-in functions (return values, no state)
M.FUNCTIONS = {
  ADD = true,
  SUB = true,
  MUL = true,
  DIV = true,
  MOD = true,
  ABS = true,
  NEG = true,
  SQR = true,
  SQRT = true,
  EXP = true,
  LN = true,
  LOG = true,
  SIN = true,
  COS = true,
  TAN = true,
  ASIN = true,
  ACOS = true,
  ATAN = true,
  MIN = true,
  MAX = true,
  LIMIT = true,
  CALCULATE = true,
  CONVERT = true,
  ROUND = true,
  TRUNC = true,
  CEIL = true,
  FLOOR = true,
  SCALE_X = true,
  NORM_X = true,
  LEN = true,
  CONCAT = true,
  LEFT = true,
  RIGHT = true,
  MID = true,
  INSERT = true,
  DELETE = true,
  REPLACE = true,
  FIND = true,
  AND = true,
  OR = true,
  XOR = true,
  NOT = true,
  SHL = true,
  SHR = true,
  ROL = true,
  ROR = true,
  DECO = true,
  ENCO = true,
  BCD_I = true,
  I_BCD = true,
  DI_BCD = true,
  DI_R = true,
  I_DI = true,
  R_DI = true,
  R_DB = true,
  MOVE = true,
  FILL = true,
  SWAP = true,
  PEEK = true,
  POKE = true,
  GET_ERROR = true,
  GET_ERR_ID = true,
  RESET_ERR = true,
  T_CONV = true,
  T_ADD = true,
  T_SUB = true,
  T_DIFF = true,
  T_COMBINE = true,
  DT_DATE = true,
  DT_TOD = true,
  DATE_TO_DTL = true,
  DTL_TO_DATE = true,
  TOD_TO_DTL = true,
  DTL_TO_TOD = true,
  TimeToTicks = true,
  TicksToTime = true,
  GETHIGHNUM = true,
  GETLOWNUM = true,
  SAMPLE = true,
  SAMPLE_TRIG = true,
  WRIT_HIST = true,
  READ_HIST = true,
  COMPRESS = true,
  READFILE = true,
  WRITEFILE = true,
  READ_DB = true,
  WRITE_DB = true,
  RDREC = true,
  WRREC = true,
  RALRM = true,
  GET_DIAG = true,
  DPRINT = true,
  CTRL_PWM = true,
  CTRL_PTO = true,
  STATUS_PTO = true,
  HOME = true,
  MOVE_JOG = true,
  MOVE_VEL = true,
  MOVE_AXIS = true,
  POS_PULSE = true,
  POS_MC = true,
  SET_CAM = true,
  CAM_TB = true,
  CAM_TE = true,
  CAM_DOWN = true,
  MC_CamIn = true,
  MC_CamOut = true,
  MC_Superimpose = true,
  MC_GearIn = true,
  MC_GearOut = true,
  MC_Phasing = true,
  MC_CombineAxes = true,
  MC_Interpolate = true,
  MC_MoveLinear = true,
  MC_MoveCircular = true,
  MC_MoveDirect = true,
  MC_Home = true,
  MC_Halt = true,
  MC_Stop = true,
  MC_Power = true,
  MC_Reset = true,
  MC_ReadParam = true,
  MC_WriteParam = true,
  MC_ReadAxisError = true,
  MC_TouchProbe = true,
  MC_AbortTrigger = true,
  MC_ExtSetPointGen = true,
  MC_Generator = true,
  MC_BRIDGE = true,
  MC_BRIDGE_OFF = true,
  ENABLE = true,
  DISABLE = true,
  DISPLAY = true,
  LOG_EVENT = true,
  ALARM = true,
  ALARM_DQ = true,
  GET_ALARM = true,
  GETINST = true,
  GETALARMST = true,
  CHANGEOVER = true,
  REPLY_VALUE = true,
  NOTIFY = true,
  NOTIFY_WITH_ACK = true,
  ASGEN = true,
  HMI_R_DISCONNECT = true,
  HMI_R_CONNECT = true,
  HMI_R_SEND = true,
  HMI_R_RECEIVE = true,
  HMI_R_GET_STATE = true,
  MODBUSPN = true,
  MODBUSCP = true,
  TSEND = true,
  TRCV = true,
  TCON = true,
  TDISCON = true,
  TSEND_C = true,
  TRCV_C = true,
  TUSEND = true,
  TURCV = true,
  TCONNECT = true,
  TDISCONNECT = true,
  GETHNSON = true,
  DELHNSON = true,
  DNS_CLIENT = true,
  DHCP_CLIENT = true,
  DCP_CLIENT = true,
  -- Spec instructions (from keywords.md - 159 additions)
  ACK_FCT_WARN = true,
  ASI_CTRL = true,
  ATH = true,
  ATTR_DB = true,
  AssignmentAttempt = true,
  BCDCPL = true,
  BITCMP = true,
  BITSUM = true,
  BLKMOV = true,
  COUNTER = true,
  Chars_TO_Strg = true,
  CountOfElements = true,
  CTRL_PWM = true,
  CTRL_PTO = true,
  DataLogCreate = true,
  DB_ANY_TO_VARIANT = true,
  DECO = true,
  DELETE = true,
  DELETE_DB = true,
  DEMUX = true,
  Deserialize = true,
  DeviceStates = true,
  DP_TOPOL = true,
  ENCO = true,
  ENDIS_PW = true,
  EXP = true,
  FileReadC = true,
  FileWriteC = true,
  FILL_BLK = true,
  FRAC = true,
  GADR_LGC = true,
  GATHER = true,
  GATHER_BLK = true,
  GEN_DIAG = true,
  Gen_UsrMsg = true,
  GEO2LOG = true,
  GEO_LOG = true,
  GET_ERR_ID = true,
  GET_ERROR = true,
  GETIO = true,
  Get_AlarmResources = true,
  Get_AlarmState = true,
  GetBlockName = true,
  GET_DIAG = true,
  GetInstanceName = true,
  GetInstancePath = true,
  GetSymbolForReference = true,
  GetSymbolName = true,
  GetSymbolPath = true,
  GOTO = true,
  HTA = true,
  INIT_RD = true,
  INSERT = true,
  IO2MOD = true,
  IS_ARRAY = true,
  JOIN = true,
  LEAD_LAG = true,
  LEFT = true,
  LGC_GADR = true,
  LOG2GEO = true,
  LOG2MOD = true,
  LOG_GEO = true,
  LOWER_BOUND = true,
  MAX_LEN = true,
  MID = true,
  ModuleStates = true,
  MOVE_BLK = true,
  MOVE_BLK_VARIANT = true,
  MoveFromResolvedSymbol = true,
  MoveResolvedSymbolsFromBuffer = true,
  MoveResolvedSymbolsToBuffer = true,
  MoveToResolvedSymbol = true,
  MUX = true,
  NORM_X = true,
  PE_CMD = true,
  PE_DS3_Write_ET200S = true,
  PEEK_BOOL = true,
  PE_Get_Mode_RSP = true,
  PE_Identify_RSP = true,
  PE_Measurement_List_RSP = true,
  PE_Measurement_Value_RSP = true,
  PE_PEM_Status_RSP = true,
  PE_START_END = true,
  PE_WOL = true,
  POKE_BLK = true,
  POKE_BOOL = true,
  PRESET_TIMER = true,
  Program_Alarm = true,
  QRY_CINT = true,
  Random = true,
  RD_ADDR = true,
  RD_DPAR = true,
  RD_DPARA = true,
  RD_LGADR = true,
  RD_LOC_T = true,
  RD_SYS_T = true,
  READ_BIG = true,
  READ_DBL = true,
  ReadFromArrayDB = true,
  ReadFromArrayDBL = true,
  READ_LITTLE = true,
  RecipeExport = true,
  RecipeImport = true,
  REF = true,
  REPLACE = true,
  RESET_TIMER = true,
  ResolveSymbols = true,
  RH_CTRL = true,
  RH_GetPrimaryID = true,
  RIGHT = true,
  ROL = true,
  ROR = true,
  ROUND = true,
  RTM = true,
  RUNTIME = true,
  SCALE = true,
  SCALE_X = true,
  SCATTER = true,
  SCATTER_BLK = true,
  S_CD = true,
  S_COMP = true,
  S_CONV = true,
  S_CU = true,
  SEG = true,
  SEL = true,
  Serialize = true,
  SET_CINT = true,
  SET_TIMEZONE = true,
  SET_TINT = true,
  SET_TINTL = true,
  SHL = true,
  SHR = true,
  SIGN = true,
  SMC = true,
  S_MOVE = true,
  S_ODT = true,
  S_ODTS = true,
  S_OFFDT = true,
  S_PEXT = true,
  SPLIT = true,
  S_PULSE = true,
  SQR = true,
  SQRT = true,
  Strg_TO_Chars = true,
  STRG_VAL = true,
  SWAP = true,
  SYNC_PI = true,
  SYNC_PO = true,
  T_ADD = true,
  TAN = true,
  T_COMBINE = true,
  T_COMP = true,
  T_CONV = true,
  T_DIFF = true,
  TIME_TCK = true,
  TRUNC = true,
  T_SUB = true,
  TypeOf = true,
  TypeOfDB = true,
  TypeOfElements = true,
  UBLKMOV = true,
  UFILL_BLK = true,
  UMOVE_BLK = true,
  UNSCALE = true,
  UPDAT_PI = true,
  UPDAT_PO = true,
  UPPER_BOUND = true,
  VAL_STRG = true,
  VariantGet = true,
  VariantPut = true,
  VARIANT_TO_DB_ANY = true,
  WAIT = true,
  WR_DPARM = true,
  WRIT_DBL = true,
  WRITE_BIG = true,
  WRITE_LITTLE = true,
  WriteToArrayDB = true,
  WriteToArrayDBL = true,
  WR_LOC_T = true,
  WR_SYS_T = true,
}

-- Built-in function blocks (have state, need instance)
M.FUNCTION_BLOCKS = {
  TON = true,
  TOF = true,
  TP = true,
  TONR = true,
  CTU = true,
  CTD = true,
  CTUD = true,
  IEC_TIMER = true,
  IEC_TON = true,
  IEC_TOF = true,
  IEC_TP = true,
  IEC_COUNTER = true,
  IEC_CTU = true,
  IEC_CTD = true,
  IEC_CTUD = true,
  R_TRIG = true,
  F_TRIG = true,
  SR = true,
  RS = true,
  SCHEDULE = true,
  BPM = true,
  LOG = true,
  DATALOG = true,
  -- Spec function blocks (from keywords.md)
  ATTACH = true,
  CAN_TINT = true,
  DCAT = true,
  DETACH = true,
  DIS_AIRT = true,
  DRUM = true,
  EN_AIRT = true,
  ENDIS_PW = true,
  EN_IRT = true,
  GEN_DIAG = true,
  MCTA = true,
  PRESET_TIMER = true,
  RE_TRIGR = true,
  RESET_TIMER = true,
  RTM = true,
  RUNTIME = true,
  SET_TIMEZONE = true,
}

M.DATA_TYPES = {
  BOOL = true,
  BYTE = true,
  WORD = true,
  DWORD = true,
  LWORD = true,
  CHAR = true,
  WCHAR = true,
  STRING = true,
  WSTRING = true,
  INT = true,
  DINT = true,
  LINT = true,
  USINT = true,
  SINT = true,
  UINT = true,
  UDINT = true,
  ULINT = true,
  REAL = true,
  LREAL = true,
  TIME = true,
  DATE = true,
  TOD = true,
  TIME_OF_DAY = true,
  DATE_AND_TIME = true,
  DT = true,
  S5TIME = true,
  LTIME = true,
  DTL = true,
  -- Additional S7-1500 data types
  LTOD = true,
  LDT = true,
  LTIME_OF_DAY = true,
  DATE_AND_LTIME = true,
  VARIANT = true,
  -- IEC timer/counter sub-types
  TON_TIME = true,
  TOF_TIME = true,
  TONR_TIME = true,
  TP_TIME = true,
  IEC_TIMER = true,
  IEC_COUNTER = true,
  IEC_CTU = true,
  IEC_CTD = true,
  IEC_CTUD = true,
  IEC_TON = true,
  IEC_TOF = true,
  IEC_TP = true,
}

-- Parameter definitions for built-in instructions
-- Format: { inputs = { { name, type }, ... }, outputs = { { name, type }, ... } }
M.PARAMETERS = {
  TON = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  TOF = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  TP = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  TONR = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  CTU = { inputs = { { name = "CU", type = "BOOL" }, { name = "R", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "INT" } } },
  CTD = { inputs = { { name = "CD", type = "BOOL" }, { name = "LD", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "INT" } } },
  CTUD = { inputs = { { name = "CU", type = "BOOL" }, { name = "CD", type = "BOOL" }, { name = "R", type = "BOOL" }, { name = "LD", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "QU", type = "BOOL" }, { name = "QD", type = "BOOL" }, { name = "CV", type = "INT" } } },
  R_TRIG = { inputs = { { name = "CLK", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" } } },
  F_TRIG = { inputs = { { name = "CLK", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" } } },
  SR = { inputs = { { name = "S", type = "BOOL" }, { name = "R1", type = "BOOL" } }, outputs = { { name = "Q1", type = "BOOL" } } },
  RS = { inputs = { { name = "S1", type = "BOOL" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q1", type = "BOOL" } } },
  IEC_TIMER = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  IEC_TON = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  IEC_TOF = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  IEC_TP = { inputs = { { name = "IN", type = "BOOL" }, { name = "PT", type = "TIME" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "ET", type = "TIME" } } },
  IEC_COUNTER = { inputs = { { name = "CU", type = "BOOL" }, { name = "CD", type = "BOOL" }, { name = "R", type = "BOOL" }, { name = "LD", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "QU", type = "BOOL" }, { name = "QD", type = "BOOL" }, { name = "CV", type = "INT" } } },
  IEC_CTU = { inputs = { { name = "CU", type = "BOOL" }, { name = "R", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "INT" } } },
  IEC_CTD = { inputs = { { name = "CD", type = "BOOL" }, { name = "LD", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "INT" } } },
  IEC_CTUD = { inputs = { { name = "CU", type = "BOOL" }, { name = "CD", type = "BOOL" }, { name = "R", type = "BOOL" }, { name = "LD", type = "BOOL" }, { name = "PV", type = "INT" } }, outputs = { { name = "QU", type = "BOOL" }, { name = "QD", type = "BOOL" }, { name = "CV", type = "INT" } } },
  ADD = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  SUB = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  MUL = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  DIV = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  MIN = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  MAX = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  LIMIT = { inputs = { { name = "MN" }, { name = "IN" }, { name = "MX" } }, outputs = { { name = "OUT" } } },
  MOVE = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  CONVERT = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  ROUND = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  TRUNC = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  CEIL = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  FLOOR = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  SQR = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  SQRT = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  SIN = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  COS = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  TAN = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  ASIN = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  ACOS = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  ATAN = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  LEN = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  CONCAT = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  LEFT = { inputs = { { name = "IN" }, { name = "L" } }, outputs = { { name = "OUT" } } },
  RIGHT = { inputs = { { name = "IN" }, { name = "L" } }, outputs = { { name = "OUT" } } },
  MID = { inputs = { { name = "IN" }, { name = "L" }, { name = "P" } }, outputs = { { name = "OUT" } } },
  AND = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  OR = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  XOR = { inputs = { { name = "IN1" }, { name = "IN2" } }, outputs = { { name = "OUT" } } },
  SHL = { inputs = { { name = "IN" }, { name = "N" } }, outputs = { { name = "OUT" } } },
  SHR = { inputs = { { name = "IN" }, { name = "N" } }, outputs = { { name = "OUT" } } },
  ROL = { inputs = { { name = "IN" }, { name = "N" } }, outputs = { { name = "OUT" } } },
  ROR = { inputs = { { name = "IN" }, { name = "N" } }, outputs = { { name = "OUT" } } },
  BCD_I = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  I_BCD = { inputs = { { name = "IN" } }, outputs = { { name = "OUT" } } },
  -- Spec parameter signatures (extracted from instructions.md)
  ATH = { inputs = { { name = "IN", type = "Variant" }, { name = "N", type = "INT" } }, outputs = { { name = "OUT", type = "Variant" } } },
  BCDCPL = { inputs = { { name = "Operand", type = "Bit String" } } },
  BITSUM = { inputs = { { name = "Operand", type = "DWORD" } } },
  BLKMOV = { inputs = { { name = "SRCBLK", type = "Variant" } }, outputs = { { name = "DSTBLK", type = "Variant" } } },
  Chars_TO_Strg = { inputs = { { name = "CHARS", type = "Variant" }, { name = "PCHARS", type = "DINT" }, { name = "CNT", type = "UINT" } }, outputs = { { name = "STRG", type = "STRING" } } },
  DB_ANY_TO_Variant = { inputs = { { name = "IN", type = "DB_ANY" } }, outputs = { { name = "ERR", type = "INT" } } },
  DCAT = { inputs = { { name = "CMD", type = "BOOL" }, { name = "O_FB", type = "BOOL" }, { name = "C_FB", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "OA", type = "BOOL" }, { name = "CA", type = "BOOL" } } },
  DEMUX = { inputs = { { name = "K", type = "integer" }, { name = "IN", type = "Variant" } }, outputs = { { name = "OUT0", type = "Variant" }, { name = "OUT1", type = "Variant" }, { name = "OUTn", type = "Variant" }, { name = "OUTELSE", type = "Variant" } } },
  DRUM = { inputs = { { name = "RESET", type = "BOOL" }, { name = "JOG", type = "BOOL" }, { name = "DRUM_EN", type = "BOOL" }, { name = "LST_STEP", type = "BYTE" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "OUT_WORD", type = "WORD" }, { name = "ERR_CODE", type = "WORD" } } },
  ENDIS_PW = { inputs = { { name = "REQ", type = "BOOL" }, { name = "FULL_PWD", type = "BOOL" }, { name = "R_PWD", type = "BOOL" }, { name = "HMI_PWD", type = "BOOL" } }, outputs = { { name = "F_PWD_ON", type = "BOOL" }, { name = "FULL_PWD_ON", type = "BOOL" }, { name = "R_PWD_ON", type = "BOOL" }, { name = "HMI_PWD_ON", type = "BOOL" }, { name = "RET_VAL", type = "WORD" } } },
  FILL = { inputs = { { name = "BVAL", type = "Variant" } }, outputs = { { name = "BLK", type = "Variant" } } },
  FIND = { inputs = { { name = "IN1", type = "STRING" }, { name = "IN2", type = "STRING" } } },
  GetBlockName = { inputs = { { name = "SIZE", type = "DINT" } }, outputs = { { name = "RET_VAL", type = "WSTRING" } } },
  GetInstanceName = { inputs = { { name = "SIZE", type = "DINT" } }, outputs = { { name = "OUT", type = "WSTRING" } } },
  GetInstancePath = { inputs = { { name = "SIZE", type = "DINT" } }, outputs = { { name = "OUT", type = "WSTRING" } } },
  GetSymbolForReference = { inputs = { { name = "execute", type = "Bool" }, { name = "objectRef", type = "Reference" }, { name = "size", type = "DInt" } }, outputs = { { name = "done", type = "Bool" }, { name = "busy", type = "Bool" }, { name = "error", type = "Bool" }, { name = "status", type = "Int" } } },
  GetSymbolPath = { inputs = { { name = "VARIABLE", type = "PARAMETER" }, { name = "SIZE", type = "DINT" } }, outputs = { { name = "OUT", type = "WSTRING" } } },
  HTA = { inputs = { { name = "IN", type = "Variant" }, { name = "N", type = "UINT" } }, outputs = { { name = "OUT", type = "Variant" } } },
  INIT_RD = { inputs = { { name = "Operand", type = "BOOL" } }, outputs = { { name = "RET_VAL", type = "INT" } } },
  JOIN = { inputs = { { name = "Mode", type = "DWORD" }, { name = "RecSeparator", type = "Variant" }, { name = "EndSeparator", type = "Variant" }, { name = "SrcStruct", type = "Variant" }, { name = "Count", type = "UDINT" } } },
  LEAD_LAG = { inputs = { { name = "IN", type = "REAL" }, { name = "SAMPLE_T", type = "INT" } }, outputs = { { name = "OUT", type = "REAL" }, { name = "ERR_CODE", type = "WORD" } } },
  LOWER_BOUND = { inputs = { { name = "ARR", type = "ARRAY" }, { name = "DIM", type = "UDINT" } } },
  MAX_LEN = { inputs = { { name = "IN", type = "STRING" } } },
  MCAT = { inputs = { { name = "O_CMD", type = "BOOL" }, { name = "C_CMD", type = "BOOL" }, { name = "S_CMD", type = "BOOL" }, { name = "O_FB", type = "BOOL" }, { name = "C_FB", type = "BOOL" } }, outputs = { { name = "OO", type = "BOOL" }, { name = "CO", type = "BOOL" }, { name = "OA", type = "BOOL" }, { name = "CA", type = "BOOL" }, { name = "Q", type = "BOOL" } } },
  MOVE_BLK = { inputs = { { name = "IN", type = "Variant" }, { name = "COUNT", type = "UInt" } }, outputs = { { name = "OUT", type = "Variant" } } },
  MOVE_BLK_Variant = { inputs = { { name = "SRC", type = "Variant" }, { name = "COUNT", type = "UDINT" }, { name = "SRC_INDEX", type = "DINT" }, { name = "DEST_INDEX", type = "DINT" } }, outputs = { { name = "DEST", type = "Variant" } } },
  MUX = { inputs = { { name = "K", type = "integer" }, { name = "IN0", type = "Variant" }, { name = "IN1", type = "Variant" }, { name = "INn", type = "Variant" }, { name = "INELSE", type = "Variant" } } },
  NORM_X = { inputs = { { name = "EN", type = "BOOL" }, { name = "MIN", type = "Variant" }, { name = "VALUE", type = "Variant" }, { name = "MAX", type = "Variant" } }, outputs = { { name = "ENO", type = "BOOL" } } },
  RD_LOC_T = { outputs = { { name = "OUT", type = "DTL" } } },
  RD_SYS_T = { outputs = { { name = "OUT", type = "DTL" } } },
  REF = { inputs = { { name = "Expression", type = "Variant" } } },
  RE_TRIGR = { inputs = { { name = "MODE", type = "UINT" }, { name = "COMMENT", type = "STRING" } } },
  ROL = { inputs = { { name = "IN", type = "Variant" }, { name = "N", type = "USINT" } } },
  ROR = { inputs = { { name = "IN", type = "Variant" }, { name = "N", type = "USINT" } } },
  RTM = { inputs = { { name = "NR", type = "RTM" }, { name = "MODE", type = "BYTE" }, { name = "PV", type = "DINT" } }, outputs = { { name = "CQ", type = "BOOL" }, { name = "CV", type = "DINT" } } },
  SCALE = { inputs = { { name = "IN", type = "INT" }, { name = "HI_LIM", type = "REAL" }, { name = "LO_LIM", type = "REAL" }, { name = "BIPOLAR", type = "BOOL" } }, outputs = { { name = "OUT", type = "REAL" } } },
  SCALE_X = { inputs = { { name = "EN", type = "BOOL" }, { name = "MIN", type = "Variant" }, { name = "VALUE", type = "Float" }, { name = "MAX", type = "Variant" } }, outputs = { { name = "ENO", type = "BOOL" } } },
  SEG = { inputs = { { name = "IN", type = "WORD" } }, outputs = { { name = "OUT", type = "DWORD" } } },
  SEL = { inputs = { { name = "G", type = "BOOL" }, { name = "IN0", type = "Variant" }, { name = "IN1", type = "Variant" } } },
  SET_TIMEZONE = { inputs = { { name = "REQ", type = "BOOL" }, { name = "TimeZone", type = "TimeTransformationRule" } }, outputs = { { name = "DONE", type = "BOOL" }, { name = "BUSY", type = "BOOL" }, { name = "ERROR", type = "BOOL" }, { name = "STATUS", type = "WORD" } } },
  SHL = { inputs = { { name = "IN", type = "Variant" }, { name = "N", type = "USINT" } } },
  SHR = { inputs = { { name = "IN", type = "Variant" }, { name = "N", type = "USINT" } } },
  SMC = { outputs = { { name = "OUT", type = "BOOL" }, { name = "OUT_STEP", type = "BYTE" }, { name = "ERR_CODE", type = "WORD" } } },
  SPLIT = { inputs = { { name = "Mode", type = "DWord" }, { name = "RecSeparator", type = "Variant" }, { name = "EndSeparator", type = "Variant" }, { name = "SrcArray", type = "Variant" } }, outputs = { { name = "Count", type = "UDInt" } } },
  STRG_VAL = { inputs = { { name = "IN", type = "STRING" }, { name = "FORMAT", type = "WORD" }, { name = "P", type = "UINT" } }, outputs = { { name = "OUT", type = "Variant" } } },
  S_CD = { inputs = { { name = "C_NO", type = "COUNTER" }, { name = "CD", type = "BOOL" }, { name = "S", type = "BOOL" }, { name = "PV", type = "WORD" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "WORD" } } },
  S_COMP = { inputs = { { name = "IN1", type = "STRING" }, { name = "IN2", type = "STRING" } }, outputs = { { name = "OUT", type = "BOOL" } } },
  S_CONV = { inputs = { { name = "IN", type = "CHAR" } }, outputs = { { name = "OUT", type = "CHAR" } } },
  S_CU = { inputs = { { name = "C_NO", type = "COUNTER" }, { name = "CU", type = "BOOL" }, { name = "S", type = "BOOL" }, { name = "PV", type = "WORD" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "WORD" } } },
  S_CUD = { inputs = { { name = "C_NO", type = "COUNTER" }, { name = "CU", type = "BOOL" }, { name = "CD", type = "BOOL" }, { name = "S", type = "BOOL" }, { name = "PV", type = "WORD" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "CV", type = "WORD" } } },
  S_MOVE = { inputs = { { name = "IN", type = "STRING" } }, outputs = { { name = "OUT", type = "STRING" } } },
  S_ODT = { inputs = { { name = "T_NO", type = "TIMER" }, { name = "S", type = "BOOL" }, { name = "TV", type = "S5TIME" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "BI", type = "WORD" } } },
  S_ODTS = { inputs = { { name = "T_NO", type = "TIMER" }, { name = "S", type = "BOOL" }, { name = "TV", type = "S5TIME" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "BI", type = "WORD" } } },
  S_OFFDT = { inputs = { { name = "T_NO", type = "TIMER" }, { name = "S", type = "BOOL" }, { name = "TV", type = "S5TIME" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "BI", type = "WORD" } } },
  S_PEXT = { inputs = { { name = "T_NO", type = "TIMER" }, { name = "S", type = "BOOL" }, { name = "TV", type = "S5TIME" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "BI", type = "WORD" } } },
  S_PULSE = { inputs = { { name = "T_NO", type = "TIMER" }, { name = "S", type = "BOOL" }, { name = "TV", type = "S5TIME" }, { name = "R", type = "BOOL" } }, outputs = { { name = "Q", type = "BOOL" }, { name = "BI", type = "WORD" } } },
  Strg_TO_Chars = { inputs = { { name = "STRG", type = "STRING" }, { name = "PCHARS", type = "DINT" } }, outputs = { { name = "CNT", type = "UINT" } } },
  T_ADD = { inputs = { { name = "IN1", type = "TIME" }, { name = "IN2", type = "TIME" } } },
  T_COMBINE = { inputs = { { name = "IN1", type = "DATE" }, { name = "IN2", type = "TOD" } } },
  T_COMP = { inputs = { { name = "IN1", type = "DATE" }, { name = "IN2", type = "DATE" } }, outputs = { { name = "OUT", type = "BOOL" } } },
  T_CONV = { inputs = { { name = "IN", type = "Variant" } } },
  T_DIFF = { inputs = { { name = "IN1", type = "DTL" }, { name = "IN2", type = "DTL" } } },
  T_SUB = { inputs = { { name = "IN1", type = "TIME" }, { name = "IN2", type = "TIME" } } },
  UBLKMOV = { inputs = { { name = "SRCBLK", type = "Variant" } }, outputs = { { name = "DSTBLK", type = "Variant" } } },
  UNSCALE = { inputs = { { name = "IN", type = "REAL" }, { name = "HI_LIM", type = "REAL" }, { name = "LO_LIM", type = "REAL" }, { name = "BIPOLAR", type = "BOOL" } }, outputs = { { name = "OUT", type = "INT" } } },
  UPPER_BOUND = { inputs = { { name = "ARR", type = "ARRAY" }, { name = "DIM", type = "UDINT" } } },
  VAL_STRG = { inputs = { { name = "IN", type = "Variant" }, { name = "SIZE", type = "USINT" }, { name = "PREC", type = "USINT" }, { name = "FORMAT", type = "WORD" } }, outputs = { { name = "OUT", type = "STRING" } } },
  VariantGet = { inputs = { { name = "SRC", type = "Variant" }, { name = "DST", type = "Variant" } } },
  VariantPut = { inputs = { { name = "SRC", type = "Variant" }, { name = "DST", type = "Variant" } } },
  Variant_TO_DB_ANY = { inputs = { { name = "IN", type = "Variant" } }, outputs = { { name = "ERR", type = "INT" } } },
  WAIT = { inputs = { { name = "WT", type = "INT" } } },
  WR_LOC_T = { inputs = { { name = "LOCTIME", type = "DTL" }, { name = "DST", type = "BOOL" } } },
  WR_SYS_T = { inputs = { { name = "IN", type = "DTL" } } },
}

-- Get parameter info for a built-in instruction
-- @param name string The instruction name
-- @return table|nil Parameter definition with inputs and outputs arrays
function M.get_parameters(name)
  return M.PARAMETERS[name:upper()] or M.PARAMETERS[name] or nil
end

function M.is_known_function_block(name)
  return M.FUNCTION_BLOCKS[name:upper()] or M.FUNCTION_BLOCKS[name] or false
end

function M.is_known_function(name)
  return M.FUNCTIONS[name:upper()] or M.FUNCTIONS[name] or false
end

-- Check if name is a known data type
-- @param name string The name to check
-- @return boolean True if known data type
function M.is_known_data_type(name)
  return M.DATA_TYPES[name:upper()] or false
end

-- Check if name is a known instruction (function or function block)
-- @param name string The name to check
-- @return boolean True if known instruction
function M.is_known_instruction(name)
  return M.is_known_function(name) or M.is_known_function_block(name) or false
end

-- Check if name is a known type or instruction
-- @param name string The name to check
-- @return boolean True if known type or instruction
function M.is_known_type_or_instruction(name)
  return M.is_known_data_type(name) or M.is_known_instruction(name) or false
end

return M