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from os.path import join, split, realpath

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sd = split(realpath(__file__))[0]

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# Override gettext _ in this module

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# since we just want string to be added to dictionnary

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# but translation should happen here

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_ = lambda x:x

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LANGUAGES = ["IL","ST","FBD","LD","SFC"]

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LOCATIONDATATYPES = {"X" : ["BOOL"],

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                     "B" : ["SINT", "USINT", "BYTE", "STRING"],

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                     "W" : ["INT", "UINT", "WORD", "WSTRING"],

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                     "D" : ["DINT", "UDINT", "REAL", "DWORD"],

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                     "L" : ["LINT", "ULINT", "LREAL", "LWORD"]} 

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#-------------------------------------------------------------------------------

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#                        Function Block Types definitions

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#-------------------------------------------------------------------------------

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StdTC6Libs = [(_("Standard function blocks"),  join(sd, "Standard_Function_Blocks.xml")),

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              (_("Additional function blocks"),join(sd, "Additional_Function_Blocks.xml"))]

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StdFuncsCSV = join(sd,"iec_std.csv")

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# FIXME : since std fb now loaded from TC6 file, is that still necessary ?

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StdBlockComments = {

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    "SR": _("SR bistable\nThe SR bistable is a latch where the Set dominates."),

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    "RS": _("RS bistable\nThe RS bistable is a latch where the Reset dominates."),

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    "SEMA": _("Semaphore\nThe semaphore provides a mechanism to allow software elements mutually exclusive access to certain ressources."),

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    "R_TRIG": _("Rising edge detector\nThe output produces a single pulse when a rising edge is detected."),

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    "F_TRIG": _("Falling edge detector\nThe output produces a single pulse when a falling edge is detected."),

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    "CTU": _("Up-counter\nThe up-counter can be used to signal when a count has reached a maximum value."),

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    "CTD": _("Down-counter\nThe down-counter can be used to signal when a count has reached zero, on counting down from a preset value."),

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    "CTUD": _("Up-down counter\nThe up-down counter has two inputs CU and CD. It can be used to both count up on one input and down on the other."),

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    "TP": _("Pulse timer\nThe pulse timer can be used to generate output pulses of a given time duration."),

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    "TON": _("On-delay timer\nThe on-delay timer can be used to delay setting an output true, for fixed period after an input becomes true."),

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    "TOF": _("Off-delay timer\nThe off-delay timer can be used to delay setting an output false, for fixed period after input goes false."),

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    "RTC": _("Real time clock\nThe real time clock has many uses including time stamping, setting dates and times of day in batch reports, in alarm messages and so on."),

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    "INTEGRAL": _("Integral\nThe integral function block integrates the value of input XIN over time."),

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    "DERIVATIVE": _("Derivative\nThe derivative function block produces an output XOUT proportional to the rate of change of the input XIN."),

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    "PID": _("PID\nThe PID (proportional, Integral, Derivative) function block provides the classical three term controller for closed loop control."),

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    "RAMP": _("Ramp\nThe RAMP function block is modelled on example given in the standard."),

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    "HYSTERESIS": _("Hysteresis\nThe hysteresis function block provides a hysteresis boolean output driven by the difference of two floating point (REAL) inputs XIN1 and XIN2."),

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}

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for block_type in ["CTU", "CTD", "CTUD"]:

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    for return_type in ["DINT", "LINT", "UDINT", "ULINT"]:

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        StdBlockComments["%s_%s" % (block_type, return_type)] = StdBlockComments[block_type]

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def GetBlockInfos(pou):

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    infos = pou.getblockInfos()

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    # FIXME : as well

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    infos["comment"] = StdBlockComments[infos["name"]]

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    infos["inputs"] = [

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        (var_name, var_type, "rising")

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        if var_name in ["CU", "CD"]

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        else (var_name, var_type, var_modifier)

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        for var_name, var_type, var_modifier in infos["inputs"]]

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    return infos

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#-------------------------------------------------------------------------------

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#                           Data Types definitions

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#-------------------------------------------------------------------------------

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"""

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Ordored list of common data types defined in the IEC 61131-3

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Each type is associated to his direct parent type. It defines then a hierarchy

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between type that permits to make a comparison of two types

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"""

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TypeHierarchy_list = [

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    ("ANY", None),

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    ("ANY_DERIVED", "ANY"),

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    ("ANY_ELEMENTARY", "ANY"),

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    ("ANY_MAGNITUDE", "ANY_ELEMENTARY"),

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    ("ANY_BIT", "ANY_ELEMENTARY"),

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    ("ANY_NBIT", "ANY_BIT"),

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    ("ANY_STRING", "ANY_ELEMENTARY"),

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    ("ANY_DATE", "ANY_ELEMENTARY"),

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    ("ANY_NUM", "ANY_MAGNITUDE"),

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    ("ANY_REAL", "ANY_NUM"),

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    ("ANY_INT", "ANY_NUM"),

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    ("ANY_SINT", "ANY_INT"),

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    ("ANY_UINT", "ANY_INT"),

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    ("BOOL", "ANY_BIT"),

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    ("SINT", "ANY_SINT"),

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    ("INT", "ANY_SINT"),

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    ("DINT", "ANY_SINT"),

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    ("LINT", "ANY_SINT"),

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    ("USINT", "ANY_UINT"),

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    ("UINT", "ANY_UINT"),

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    ("UDINT", "ANY_UINT"),

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    ("ULINT", "ANY_UINT"),

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    ("REAL", "ANY_REAL"),

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    ("LREAL", "ANY_REAL"),

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    ("TIME", "ANY_MAGNITUDE"),

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    ("DATE", "ANY_DATE"),

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    ("TOD", "ANY_DATE"),

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    ("DT", "ANY_DATE"),

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    ("STRING", "ANY_STRING"),

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    ("BYTE", "ANY_NBIT"),

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    ("WORD", "ANY_NBIT"),

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    ("DWORD", "ANY_NBIT"),

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    ("LWORD", "ANY_NBIT")

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    #("WSTRING", "ANY_STRING") # TODO

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]

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DataTypeRange_list = [

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    ("SINT", (-2**7, 2**7 - 1)),

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    ("INT", (-2**15, 2**15 - 1)),

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    ("DINT", (-2**31, 2**31 - 1)),

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    ("LINT", (-2**31, 2**31 - 1)),

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    ("USINT", (0, 2**8 - 1)),

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    ("UINT", (0, 2**16 - 1)),

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    ("UDINT", (0, 2**31 - 1)),

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    ("ULINT", (0, 2**31 - 1))

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]

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ANY_TO_ANY_FILTERS = {

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    "ANY_TO_ANY":[

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        # simple type conv are let as C cast

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        (("ANY_INT","ANY_BIT"),("ANY_NUM","ANY_BIT")),

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        (("ANY_REAL",),("ANY_REAL",)),

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        # REAL_TO_INT

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        (("ANY_REAL",),("ANY_SINT",)),

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        (("ANY_REAL",),("ANY_UINT",)),

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        (("ANY_REAL",),("ANY_BIT",)),

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        # TO_TIME

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        (("ANY_INT","ANY_BIT"),("ANY_DATE","TIME")),

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        (("ANY_REAL",),("ANY_DATE","TIME")),

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        (("ANY_STRING",), ("ANY_DATE","TIME")),

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        # FROM_TIME

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        (("ANY_DATE","TIME"), ("ANY_REAL",)),

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        (("ANY_DATE","TIME"), ("ANY_INT","ANY_NBIT")),

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        (("TIME",), ("ANY_STRING",)),

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        (("DATE",), ("ANY_STRING",)),

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        (("TOD",), ("ANY_STRING",)),

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        (("DT",), ("ANY_STRING",)),

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        # TO_STRING

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        (("BOOL",), ("ANY_STRING",)),

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        (("ANY_BIT",), ("ANY_STRING",)),

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        (("ANY_REAL",), ("ANY_STRING",)),

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        (("ANY_SINT",), ("ANY_STRING",)),

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        (("ANY_UINT",), ("ANY_STRING",)),

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        # FROM_STRING

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        (("ANY_STRING",), ("BOOL",)),

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        (("ANY_STRING",), ("ANY_BIT",)),

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        (("ANY_STRING",), ("ANY_SINT",)),

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        (("ANY_STRING",), ("ANY_UINT",)),

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        (("ANY_STRING",), ("ANY_REAL",))],

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    "BCD_TO_ANY":[

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        (("BYTE",),("USINT",)),

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        (("WORD",),("UINT",)),

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        (("DWORD",),("UDINT",)),

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        (("LWORD",),("ULINT",))],

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    "ANY_TO_BCD":[

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        (("USINT",),("BYTE",)),

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        (("UINT",),("WORD",)),

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        (("UDINT",),("DWORD",)),

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        (("ULINT",),("LWORD",))]

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}

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# remove gettext override

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del _