import atexit
import os
from os.path import join
import shutil
import tempfile
from pymclevel import mclevel

__author__ = 'Rio'

tempdir = os.path.join(tempfile.gettempdir(), "pymclevel_test")
if not os.path.exists(tempdir):
    os.mkdir(tempdir)

def mktemp(suffix):
    td = tempfile.mkdtemp(suffix, dir=tempdir)
    os.rmdir(td)
    return td


class TempLevel(object):
    def __init__(self, filename, createFunc=None):
        if not os.path.exists(filename):
            filename = join("testfiles", filename)
        tmpname = mktemp(os.path.basename(filename))
        if os.path.exists(filename):
            if os.path.isdir(filename):
                shutil.copytree(filename, tmpname)
            else:
                shutil.copy(filename, tmpname)
        elif createFunc:
            createFunc(tmpname)
        else:
            raise IOError, "File %s not found." % filename

        self.tmpname = tmpname
        self.level = mclevel.fromFile(tmpname)
        atexit.register(self.removeTemp)

    def __del__(self):
        if hasattr(self, 'level'):
            self.level.close()
            del self.level

        self.removeTemp()

    def removeTemp(self):

        if hasattr(self, 'tmpname'):
            filename = self.tmpname

            if os.path.isdir(filename):
                shutil.rmtree(filename)
            else:
                os.unlink(filename)