"""Easy install Tests
"""
import sys
import os, shutil, tempfile, unittest
import site
from StringIO import StringIO
from setuptools.command.easy_install import easy_install, get_script_args, main
from setuptools.command.easy_install import  PthDistributions
from setuptools.command import easy_install as easy_install_pkg
from setuptools.dist import Distribution
from pkg_resources import Distribution as PRDistribution

class FakeDist(object):
    def get_entry_map(self, group):
        if group != 'console_scripts':
            return {}
        return {'name': 'ep'}

    def as_requirement(self):
        return 'spec'

WANTED = """\
#!%s
# EASY-INSTALL-ENTRY-SCRIPT: 'spec','console_scripts','name'
__requires__ = 'spec'
import sys
from pkg_resources import load_entry_point

if __name__ == '__main__':
    sys.exit(
        load_entry_point('spec', 'console_scripts', 'name')()
    )
""" % sys.executable

SETUP_PY = """\
from setuptools import setup

setup(name='foo')
"""

class TestEasyInstallTest(unittest.TestCase):

    def test_install_site_py(self):
        dist = Distribution()
        cmd = easy_install(dist)
        cmd.sitepy_installed = False
        cmd.install_dir = tempfile.mkdtemp()
        try:
            cmd.install_site_py()
            sitepy = os.path.join(cmd.install_dir, 'site.py')
            self.assert_(os.path.exists(sitepy))
        finally:
            shutil.rmtree(cmd.install_dir)

    def test_get_script_args(self):
        dist = FakeDist()

        old_platform = sys.platform
        try:
            name, script = get_script_args(dist).next()
        finally:
            sys.platform = old_platform

        self.assertEquals(script, WANTED)

    def test_no_setup_cfg(self):
        # makes sure easy_install as a command (main)
        # doesn't use a setup.cfg file that is located
        # in the current working directory
        dir = tempfile.mkdtemp()
        setup_cfg = open(os.path.join(dir, 'setup.cfg'), 'w')
        setup_cfg.write('[easy_install]\nfind_links = http://example.com')
        setup_cfg.close()
        setup_py = open(os.path.join(dir, 'setup.py'), 'w')
        setup_py.write(SETUP_PY)
        setup_py.close()

        from setuptools.dist import Distribution

        def _parse_command_line(self):
            msg = 'Error: a local setup.cfg was used'
            opts = self.command_options
            if 'easy_install' in opts:
                assert 'find_links' not in opts['easy_install'], msg
            return self._old_parse_command_line

        Distribution._old_parse_command_line = Distribution.parse_command_line
        Distribution.parse_command_line = _parse_command_line

        old_wd = os.getcwd()
        try:
            os.chdir(dir)
            main([])
        finally:
            os.chdir(old_wd)
            shutil.rmtree(dir)

    def test_no_find_links(self):
        # new option '--no-find-links', that blocks find-links added at
        # the project level
        dist = Distribution()
        cmd = easy_install(dist)
        cmd.check_pth_processing = lambda : True
        cmd.no_find_links = True
        cmd.find_links = ['link1', 'link2']
        cmd.install_dir = os.path.join(tempfile.mkdtemp(), 'ok')
        cmd.args = ['ok']
        cmd.ensure_finalized()
        self.assertEquals(cmd.package_index.scanned_urls, {})

        # let's try without it (default behavior)
        cmd = easy_install(dist)
        cmd.check_pth_processing = lambda : True
        cmd.find_links = ['link1', 'link2']
        cmd.install_dir = os.path.join(tempfile.mkdtemp(), 'ok')
        cmd.args = ['ok']
        cmd.ensure_finalized()
        keys = cmd.package_index.scanned_urls.keys()
        keys.sort()
        self.assertEquals(keys, ['link1', 'link2'])


class TestPTHFileWriter(unittest.TestCase):
    def test_add_from_cwd_site_sets_dirty(self):
        '''a pth file manager should set dirty 
        if a distribution is in site but also the cwd
        '''
        pth = PthDistributions('does-not_exist', [os.getcwd()])
        self.assertFalse(pth.dirty)
        pth.add(PRDistribution(os.getcwd()))
        self.assertTrue(pth.dirty)

    def test_add_from_site_is_ignored(self):
        pth = PthDistributions('does-not_exist', ['/test/location/does-not-have-to-exist'])
        self.assertFalse(pth.dirty)
        pth.add(PRDistribution('/test/location/does-not-have-to-exist'))
        self.assertFalse(pth.dirty)


class TestUserInstallTest(unittest.TestCase):

    def setUp(self):
        self.dir = tempfile.mkdtemp()
        setup = os.path.join(self.dir, 'setup.py')
        f = open(setup, 'w')
        f.write(SETUP_PY)
        f.close()
        self.old_cwd = os.getcwd()
        os.chdir(self.dir)
        if sys.version >= "2.6":
            self.old_base = site.USER_BASE
            site.USER_BASE = tempfile.mkdtemp()
            self.old_site = site.USER_SITE
            site.USER_SITE = tempfile.mkdtemp()

    def tearDown(self):
        os.chdir(self.old_cwd)
        shutil.rmtree(self.dir)
        if sys.version >=  "2.6":
            shutil.rmtree(site.USER_BASE)
            shutil.rmtree(site.USER_SITE)
            site.USER_BASE = self.old_base
            site.USER_SITE = self.old_site

    def test_install(self):
        #XXX: replace with something meaningfull
        return
        if sys.version < "2.6":
            return
        dist = Distribution()
        dist.script_name = 'setup.py'
        cmd = easy_install(dist)
        cmd.user = 1
        cmd.args = ['py']
        cmd.ensure_finalized()
        cmd.user = 1
        old_stdout = sys.stdout
        sys.stdout = StringIO()
        try:
            cmd.run()
        finally:
            sys.stdout = old_stdout

        # let's see if we got our egg link at the right place
        content = os.listdir(site.USER_SITE)
        content.sort()
        self.assertEquals(content, ['UNKNOWN.egg-link', 'easy-install.pth'])

