# ***************************************************************************
# *   Copyright (c) 2014 sliptonic <shopinthewoods@gmail.com>               *
# *                                                                         *
# *   Reabased changes from relative_post.py to linuxcnc_post.py            *
# *   and updated functionality for old EDM machines by alromh87            *
# *                                                                         *
# *   This file is part of the FreeCAD CAx development system.              *
# *                                                                         *
# *   This program is free software; you can redistribute it and/or modify  *
# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
# *   as published by the Free Software Foundation; either version 2 of     *
# *   the License, or (at your option) any later version.                   *
# *   for detail see the LICENCE text file.                                 *
# *                                                                         *
# *   FreeCAD is distributed in the hope that it will be useful,            *
# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
# *   GNU Lesser General Public License for more details.                   *
# *                                                                         *
# *   You should have received a copy of the GNU Library General Public     *
# *   License along with FreeCAD; if not, write to the Free Software        *
# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
# *   USA                                                                   *
# *                                                                         *
# ***************************************************************************

import FreeCAD
from FreeCAD import Units
import Path
import argparse
import datetime
import shlex
import Path.Post.Utils as PostUtils
import PathScripts.PathUtils as PathUtils
from builtins import open as pyopen

TOOLTIP = """
This is a postprocessor file for the Path workbench. It is used to
take a pseudo-G-code fragment outputted by a Path object, and output
real G-code suitable for a Wire EDM CNC. This postprocessor, once placed
in the appropriate PathScripts folder, can be used directly from inside
FreeCAD, via the GUI importer or via python scripts with:

import wedm_post
wedm_post.export(object,"/path/to/file.ncc","")
"""

now = datetime.datetime.now()

parser = argparse.ArgumentParser(prog="wedm", add_help=False)
parser.add_argument("--no-header", action="store_true", help="suppress header output")
parser.add_argument("--no-comments", action="store_true", help="suppress comment output")
parser.add_argument(
    "--comments-character", default="", help="Use provided character before comments"
)
parser.add_argument(
    "--command-space", default=" ", help="Use provided character as space in commands"
)
parser.add_argument("--endline-character", default="", help="Use provided character at end of line")
parser.add_argument("--line-numbers", action="store_true", help="prefix with line numbers")
parser.add_argument(
    "--no-show-editor",
    action="store_true",
    help="don't pop up editor before writing output",
)
parser.add_argument("--scale", default="1", help="Scale factor for coordinates")
parser.add_argument("--precision", default="3", help="number of digits of precision, default=3")
parser.add_argument("--fixed-length", default="0", help="use fixed length coordinates, default=0")
parser.add_argument(
    "--preamble",
    help='set commands to be issued before the first command, default="G17\nG90"',
)
parser.add_argument(
    "--postamble",
    help='set commands to be issued after the last command, default="M05\nG17 G90\nM2"',
)
parser.add_argument(
    "--inches", action="store_true", help="Convert output for US imperial mode (G20)"
)
parser.add_argument(
    "--modal",
    action="store_true",
    help="Output the Same G-command Name USE NonModal Mode",
)
parser.add_argument("--axis-modal", action="store_true", help="Output the Same Axis Value Mode")
parser.add_argument(
    "--no-tlo",
    action="store_true",
    help="suppress tool length offset (G43) following tool changes",
)
parser.add_argument(
    "--use-rapids",
    action="store_true",
    help="Allow G0 on output",
)
parser.add_argument(
    "--omit-units",
    action="store_true",
    help="Don't output units G20/G21",
)
parser.add_argument("--relative", action="store_true", help="Generate Relative GCODE")
parser.add_argument(
    "--two-digit-codes",
    action="store_true",
    help="Add trailing 0 to codes lower than 10 (G1 -> G01)",
)
parser.add_argument("--force-sign", action="store_true", help="Always add sign to coordinates")
parser.add_argument(
    "--ignore-operations",
    default="",
    help="Ignore provided operations, use Labels and separate with ','",
)

TOOLTIP_ARGS = parser.format_help()

# These globals set common customization preferences
OUTPUT_COMMENTS = True
COMMENT_CHAR = ""
COMMAND_SPACE = " "
ENDLINE = ""
OUTPUT_HEADER = True
OUTPUT_LINE_NUMBERS = False
SHOW_EDITOR = True
MODAL = False  # if true commands are suppressed if the same as previous line.
USE_TLO = True  # if true G43 will be output following tool changes
OUTPUT_DOUBLES = True  # if false duplicate axis values are suppressed if the same as previous line.
LINENR = 100  # line number starting value
USE_RAPIDS = False
OMIT_UNITS = False
RELATIVE_GCODE = False
TWO_DIGIT_CODES = False
FORCE_SIGN = False

# These globals will be reflected in the Machine configuration of the project
UNITS = "G21"  # G21 for metric, G20 for us standard
UNIT_SPEED_FORMAT = "mm/min"
UNIT_FORMAT = "mm"

MACHINE_NAME = "Wire EDM"
CORNER_MIN = {"x": 0, "y": 0, "z": 0}
CORNER_MAX = {"x": 500, "y": 300, "z": 300}
PRECISION = 3

# Preamble text will appear at the beginning of the GCODE output file.
PREAMBLE = """G17 G54 G40 G49 G80 G90
"""


# Postamble text will appear following the last operation.
POSTAMBLE = """M05
G17 G54 G90 G80 G40
M2
"""

# Pre operation text will be inserted before every operation
PRE_OPERATION = """"""

# Post operation text will be inserted after every operation
POST_OPERATION = """"""

# Tool Change commands will be inserted before a tool change
TOOL_CHANGE = """"""


def processArguments(argstring):
    global OUTPUT_HEADER
    global OUTPUT_COMMENTS
    global COMMENT_CHAR
    global COMMAND_SPACE
    global ENDLINE
    global OUTPUT_LINE_NUMBERS
    global SHOW_EDITOR
    global SCALE
    global PRECISION
    global FIXED_LENGTH
    global PREAMBLE
    global POSTAMBLE
    global UNITS
    global UNIT_SPEED_FORMAT
    global UNIT_FORMAT
    global MODAL
    global USE_TLO
    global OUTPUT_DOUBLES
    global LOCATION  # keep track for incremental
    global USE_RAPIDS
    global OMIT_UNITS
    global RELATIVE_GCODE
    global TWO_DIGIT_CODES
    global FORCE_SIGN
    global IGNORE_OPERATIONS

    try:
        args = parser.parse_args(shlex.split(argstring))
        if args.no_header:
            OUTPUT_HEADER = False
        if args.no_comments:
            OUTPUT_COMMENTS = False
        COMMENT_CHAR = args.comments_character
        COMMAND_SPACE = args.command_space
        ENDLINE = args.endline_character
        if args.line_numbers:
            OUTPUT_LINE_NUMBERS = True
        if args.no_show_editor:
            SHOW_EDITOR = False
        SCALE = int(args.scale)
        PRECISION = args.precision
        FIXED_LENGTH = int(args.fixed_length)
        if args.preamble is not None:
            PREAMBLE = args.preamble.replace("\\n", "\n")
        if args.postamble is not None:
            POSTAMBLE = args.postamble
        if args.inches:
            UNITS = "G20"
            UNIT_SPEED_FORMAT = "in/min"
            UNIT_FORMAT = "in"
            PRECISION = 4
        if args.modal:
            MODAL = True
        if args.no_tlo:
            USE_TLO = False
        if args.axis_modal:
            OUTPUT_DOUBLES = False
        if args.use_rapids:
            USE_RAPIDS = True
        if args.omit_units:
            OMIT_UNITS = True
        if args.relative:
            print("relative")
            RELATIVE_GCODE = True
            # PREAMBLE = PREAMBLE.replace("G90", "")
            # PREAMBLE = PREAMBLE.replace("G91", "")
            PREAMBLE += "\nG91"
            LOCATION = {"X": 0, "Y": 0, "Z": 0}
        if args.two_digit_codes:
            TWO_DIGIT_CODES = True
        if args.force_sign:
            FORCE_SIGN = True
        IGNORE_OPERATIONS = args.ignore_operations.split(",")

    except Exception as e:
        print(e)
        return False

    return True


def export(objectslist, filename, argstring):
    if not processArguments(argstring):
        return None
    global UNITS
    global UNIT_FORMAT
    global UNIT_SPEED_FORMAT
    global MACHINE_NAME

    for obj in objectslist:
        if not hasattr(obj, "Path"):
            print(
                "the object " + obj.Name + " is not a path. Please select only path and Compounds."
            )
            return None

    print("postprocessing...")
    gcode = ""

    # write header
    if OUTPUT_HEADER:
        gcode += linenumber() + COMMENT_CHAR + "(Exported by FreeCAD)\n"
        gcode += linenumber() + COMMENT_CHAR + "(Post Processor: " + __name__ + ")\n"
        gcode += linenumber() + COMMENT_CHAR + "(Output Time:" + str(now) + ")\n"

    # Write the preamble
    if OUTPUT_COMMENTS:
        gcode += linenumber() + COMMENT_CHAR + "(begin preamble)\n"
    for line in PREAMBLE.splitlines(False):
        gcode += linenumber() + line + "\n"
    if not OMIT_UNITS:
        gcode += linenumber() + UNITS + ENDLINE + "\n"

    for obj in objectslist:

        # Skip inactive operations
        if hasattr(obj, "Active"):
            if not obj.Active:
                continue
        if hasattr(obj, "Base") and hasattr(obj.Base, "Active"):
            if not obj.Base.Active:
                continue

        # fetch machine details
        job = PathUtils.findParentJob(obj)

        # TODO: Not sure of the use
        if hasattr(job, "MachineName"):
            MACHINE_NAME = job.MachineName

        if hasattr(job, "MachineUnits"):
            print(job.MachineUnits)
            if job.MachineUnits == "Metric":
                UNITS = "G21"
                UNIT_FORMAT = "mm"
                UNIT_SPEED_FORMAT = "mm/min"
            else:
                UNITS = "G20"
                UNIT_FORMAT = "in"
                UNIT_SPEED_FORMAT = "in/min"

        # ignore selected operations
        if obj.Label in IGNORE_OPERATIONS:
            continue
        # do the pre_op
        if OUTPUT_COMMENTS:
            gcode += linenumber() + COMMENT_CHAR + "(begin operation: %s)\n" % obj.Label
            gcode += (
                linenumber()
                + COMMENT_CHAR
                + "(machine: %s, %s)\n" % (MACHINE_NAME, UNIT_SPEED_FORMAT)
            )
        for line in PRE_OPERATION.splitlines(True):
            gcode += linenumber() + line

        # get coolant mode
        coolantMode = "None"
        if hasattr(obj, "CoolantMode") or hasattr(obj, "Base") and hasattr(obj.Base, "CoolantMode"):
            if hasattr(obj, "CoolantMode"):
                coolantMode = obj.CoolantMode
            else:
                coolantMode = obj.Base.CoolantMode

        # turn coolant on if required
        if OUTPUT_COMMENTS:
            if not coolantMode == "None":
                gcode += linenumber() + COMMENT_CHAR + "(Coolant On:" + coolantMode + ")\n"
        if coolantMode == "Flood":
            gcode += linenumber() + "M8" + "\n"
        if coolantMode == "Mist":
            gcode += linenumber() + "M7" + "\n"

        # process the operation gcode
        gcode += parse(obj)

        # do the post_op
        if OUTPUT_COMMENTS:
            gcode += linenumber() + COMMENT_CHAR + "(finish operation: %s)\n" % obj.Label
        for line in POST_OPERATION.splitlines(True):
            gcode += linenumber() + line

        # turn coolant off if required
        if not coolantMode == "None":
            if OUTPUT_COMMENTS:
                gcode += linenumber() + COMMENT_CHAR + "(Coolant Off:" + coolantMode + ")\n"
            gcode += linenumber() + "M9" + "\n"

    # do the post_amble
    if OUTPUT_COMMENTS:
        gcode += linenumber() + COMMENT_CHAR + "(begin postamble)\n"
    for line in POSTAMBLE.splitlines(True):
        gcode += linenumber() + line

    if FreeCAD.GuiUp and SHOW_EDITOR:
        final = gcode
        if len(gcode) > 100000:
            print("Skipping editor since output is greater than 100kb")
        else:
            dia = PostUtils.GCodeEditorDialog()
            dia.editor.setText(gcode)
            result = dia.exec_()
            if result:
                final = dia.editor.toPlainText()
    else:
        final = gcode

    print("done postprocessing.")

    if not filename == "-":
        gfile = pyopen(filename, "w")
        gfile.write(final)
        gfile.close()

    return final


def linenumber():
    global LINENR
    if OUTPUT_LINE_NUMBERS is True:
        LINENR += 10
        return "N" + str(LINENR) + COMMAND_SPACE
    return ""


def parse(pathobj):
    global PRECISION
    global MODAL
    global OUTPUT_DOUBLES
    global UNIT_FORMAT
    global UNIT_SPEED_FORMAT
    global RELATIVE_GCODE
    global LOCATION

    out = ""
    lastcommand = None
    precision_string = "." + str(PRECISION) + "f"
    currLocation = {}  # keep track for incremental

    # the order of parameters
    # linuxcnc doesn't want K properties on XY plane  Arcs need work.
    params = [
        "X",
        "Y",
        "Z",
        "A",
        "B",
        "C",
        "I",
        "J",
        "F",
        "S",
        "T",
        "Q",
        "R",
        "L",
        "H",
        "D",
        "P",
    ]
    firstmove = Path.Command("G0", {"X": 0, "Y": 0, "Z": 0, "F": 0.0})
    currLocation.update(firstmove.Parameters)  # set First location Parameters

    if hasattr(pathobj, "Group"):  # We have a compound or project.
        # if OUTPUT_COMMENTS:
        #     out += linenumber() + COMMENT_CHAR + "(compound: " + pathobj.Label + ")\n"
        for p in pathobj.Group:
            out += parse(p)
        return out
    else:  # parsing simple path

        # groups might contain non-path things like stock.
        if not hasattr(pathobj, "Path"):
            return out

        # if OUTPUT_COMMENTS:
        #     out += linenumber() + COMMENT_CHAR + "(" + pathobj.Label + ")\n"

        for c in PathUtils.getPathWithPlacement(pathobj).Commands:
            # For Debug Only
            #     if OUTPUT_COMMENTS:
            #         out += linenumber() + COMMENT_CHAR + "(" + str(c) + ")\n"

            outstring = []
            command = c.Name
            if not USE_RAPIDS and (command == "G0" or command == "G00"):
                command = "G1"
            outstring.append(command)

            # if modal: suppress the command if it is the same as the last one
            if MODAL is True:
                if command == lastcommand:
                    outstring.pop(0)

            if command[0] == "(":  # command is a comment
                if OUTPUT_COMMENTS:  # Edit comment  with COMMENT_CHAR
                    outstring.insert(0, COMMENT_CHAR)
                else:
                    continue

            move_comands = ["G0", "G00", "G1", "G01"]
            # Now add the remaining parameters in order
            for param in params:
                if param in c.Parameters:
                    if param == "F" and (
                        currLocation[param] != c.Parameters[param] or OUTPUT_DOUBLES
                    ):
                        if command not in [
                            "G0",
                            "G00",
                        ]:  # linuxcnc doesn't use rapid speeds
                            speed = Units.Quantity(c.Parameters["F"], FreeCAD.Units.Velocity)
                            if speed.getValueAs(UNIT_SPEED_FORMAT) > 0.0:
                                outstring.append(
                                    param
                                    + format(
                                        float(speed.getValueAs(UNIT_SPEED_FORMAT)),
                                        precision_string,
                                    )
                                )
                        else:
                            continue
                    elif param == "T":
                        outstring.append(param + str(int(c.Parameters["T"])))
                    elif param == "H":
                        outstring.append(param + str(int(c.Parameters["H"])))
                    elif param == "D":
                        outstring.append(param + str(int(c.Parameters["D"])))
                    elif param == "S":
                        outstring.append(param + str(int(c.Parameters["S"])))
                    # For wire EDM we ignore values for Z
                    elif param == "Z":
                        continue
                    else:
                        if (
                            (not OUTPUT_DOUBLES)
                            and (param in currLocation)
                            and (currLocation[param] == c.Parameters[param])
                        ):
                            continue
                        else:
                            if RELATIVE_GCODE and (param != "I" and param != "J"):
                                pos = Units.Quantity(
                                    c.Parameters[param] - currLocation[param], FreeCAD.Units.Length
                                )
                                print(
                                    f"currlocation: {currLocation[param]} param: {c.Parameters[param]} pos: {pos}"
                                )
                                if pos == 0:
                                    # Remove no movement
                                    continue
                            else:
                                pos = Units.Quantity(c.Parameters[param], FreeCAD.Units.Length)

                            pos = pos * SCALE
                            sign = ""
                            if pos >= 0 and FORCE_SIGN:
                                sign = "+"

                            stringout = sign + format(
                                float(pos.getValueAs(UNIT_FORMAT)), precision_string
                            )

                            # Remove unneeded 0s on incremental moves this is needed since some numbers are zero only after applying precision
                            if (
                                RELATIVE_GCODE
                                and command in move_comands
                                and (float(stringout) == 0)
                            ):
                                continue
                            # Force trailing zeros
                            if FIXED_LENGTH > 0:
                                extra = 1 if stringout[0] in ["+", "-"] else 0
                                stringout = stringout.zfill(FIXED_LENGTH + extra)
                            outstring.append(param + stringout)

            currLocation.update(c.Parameters)

            # Check for Tool Change:
            if command == "M6":
                # stop the spindle
                out += linenumber() + "M5\n"
                for line in TOOL_CHANGE.splitlines(True):
                    out += linenumber() + line

                # add height offset
                if USE_TLO:
                    tool_height = "\nG43 H" + str(int(c.Parameters["T"]))
                    outstring.append(tool_height)

            if command == "message":
                if OUTPUT_COMMENTS is False:
                    out = []
                else:
                    outstring.pop(0)  # remove the command

            # prepend a line number and append a newline
            if len(outstring) >= 1:
                if len(outstring) == 1 and (outstring[0] == "G0" or outstring[0] == "G1"):
                    # Don't write empty moves (Generated when Z moves are ignored for EDM)
                    print("Ignoring: " + command + ":" + outstring[0])
                    continue
                if TWO_DIGIT_CODES and len(command) == 2 and outstring[0] == command:
                    outstring[0] = command[0] + "0" + command[1]
                if OUTPUT_LINE_NUMBERS:
                    outstring.insert(0, (linenumber()))

                # append the line to the final output
                start = True
                for w in outstring:
                    if start:
                        start = False
                    else:
                        out += COMMAND_SPACE
                    out += w
                # Note: Do *not* strip `out`, since that forces the allocation
                # of a contiguous string & thus quadratic complexity.
                out += ENDLINE + "\n"

            # store the latest command after written
            lastcommand = command

        return out


# print(__name__ + " gcode postprocessor loaded.")