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"""Quartz-powered vector machine

Copyright 20142022 Samizdat Drafting Co.
A derivative of https://www.nodebox.net/code/index.php/Home by Frederik De Bleser & Tom De Smedt

All rights reserved.
MIT Licensed (see README file for details)
"""
import sys, re, os

__version__ = '1.0.0'
__author__  = 'Christian Swinehart'
__email__   = 'drafting@samizdat.co'
__credits__ = 'Frederik De Bleser, Tom De Smedt, Just van Rossum, & Marcos Ojeda'
__license__ = 'MIT'

INTERNAL = '_p_l_o_t_d_e_v_i_c_e_' # the global non-conflicting token (fingers crossed)
class DeviceError(Exception): pass # please excuse our technical difficulties
class Halted(Exception): pass      # special exception to cleanly exit animations

# note whether the module is being used within the .app, via console.py, or from the repl
called_from = getattr(sys.modules['__main__'], '__file__', '')
in_app = called_from.endswith('plotdevice-app.py')
in_setup = called_from.endswith('setup.py')

# don't mess with sys.path during builds
if not in_setup:
    # add the shared directory (for Libraries) to the path
    sys.path.append(os.path.join(os.getenv('HOME'), 'Library', 'Application Support', 'PlotDevice'))

    # use the bundled copy of PyObjC rather than the system version
    from .run import objc

    # print python exceptions to the console rather than silently failing
    objc.setVerbose(True)

# populate the namespace (or don't) depending on the context
if in_app or in_setup:
    # if a script imports * from within the app, nothing should be (re-)added to the
    # global namespace. we'll let the Sandbox handle populating the namespace instead.
    __all__ = []
else:
    # if imported from an external module, set up a drawing environment in __all__.
    # (note that since this happens at the module level, the canvas will be shared
    # among all the files in a given process that `import *`).

    # create a global canvas and graphics context for the draw functions to operate on
    from .context import Context
    ctx = Context()

    # set up the standard plotdevice global namespace by exposing the module-level
    # context/canvas's internal ns
    globals().update(ctx._ns)
    __all__ = list(ctx._ns.keys())