import os
import tarfile
import pytest

from bunker.files.tarfile import RewriteableTarFile
from bunker.files.bunkeredfile import BunkeredFile


def test_create(tmpdir):
	tmpdname = str(tmpdir)

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = BunkeredFile.empty("__bunker_main__")
	tf.add_file(f)

	f = tf.get_file("__bunker_main__")
	f.write(b"foobar")
	
	tf.close()

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = tf.get_file("__bunker_main__")
	
	assert f.read() == b"foobar"

def test_rewrite(tmpdir):
	tmpdname = str(tmpdir)

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = BunkeredFile.empty("__bunker_main__")
	tf.add_file(f)
	tf.add_file(BunkeredFile.empty("test.tx"))

	f = tf.get_file("__bunker_main__")
	f.write(b"foobar")
	
	tf.close()
	
	assert f.closed == True

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = tf.get_file("__bunker_main__")
	f.write(b"foobaz")
	tf.close()
	
	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = tf.get_file("__bunker_main__")
	assert f.read() == b"foobaz"

def test_writeback(tmpdir):
	tmpdname = str(tmpdir)

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = BunkeredFile.empty("__bunker_main__")
	tf.add_file(f)
	tf.add_file(BunkeredFile.empty("test.tx"))

	f = tf.get_file("__bunker_main__")
	f.write(b"foobar")
	
	tf.close()

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = tf.get_file("__bunker_main__")
	f.write(b"foobaz")
	f.close()
	tf.close()
	
	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = tf.get_file("__bunker_main__")
	assert f.read() == b"foobaz"



def test_delete(tmpdir):
	tmpdname = str(tmpdir)

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	f = BunkeredFile.empty("__bunker_main__")
	tf.add_file(f)
	tf.add_file(BunkeredFile.empty("test.tx"))

	f = tf.get_file("__bunker_main__")
	f.write(b"foobar")
	
	tf.close()

	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))
	tf.delete_file("__bunker_main__")
	tf.close()
	
	tf = RewriteableTarFile.open(os.path.join(tmpdname, "test.bunker"))

	with pytest.raises(KeyError):
		f = tf.get_file("__bunker_main__")