#!/usr/bin/env python
# encoding: utf-8
#
# To execute this test requires two terminals, one for running Vim and one
# for executing the test script. Both terminals should have their current
# working directories set to this directory (the one containing this test.py
# script).
#
# In one terminal, launch a GNU ``screen`` session named ``vim``:
#   $ screen -S vim
#
#   Or the following if you use ``tmux``:
#
#   $ tmux new -s vim
#
# Now, from another terminal, launch the testsuite:
#    $ ./test_all.py
#
# Note: if you want to Vim against the Python 3 bindings, you must launch the
# test suite using Python 3.  For example:
#    $ python3 ./test_all.py
#
# For each test, the test.py script will launch vim with a vimrc, run the test,
# compare the output and exit vim again. The keys are send using screen.
#
# To limit the tests that are executed, specify a pattern to be used to match
# the beginning of the test name.  For instance, the following will execute all
# tests that start with "SimpleExpand":
#    $ ./test_all.py SimpleExpand
#
# NOTE: The test suite is not working under Windows right now as I have no
# access to a windows system for fixing it. Volunteers welcome. Here are some
# comments from the last time I got the test suite running under windows.
#
# Under windows, COM's SendKeys is used to send keystrokes to the gvim window.
# Note that Gvim must use english keyboard input (choose in windows registry)
# for this to work properly as SendKeys is a piece of chunk. (i.e. it sends
# <F13> when you send a | symbol while using german key mappings)

# pylint: skip-file

import os
import platform
import subprocess
import unittest

from test.constant import *
from test.vim_interface import *

def plugin_cache_dir():
    """The directory that we check out our bundles to."""
    return os.path.join(tempfile.gettempdir(), "UltiSnips_test_vim_plugins")

def clone_plugin(plugin):
    """Clone the given plugin into our plugin directory."""
    dirname = os.path.join(plugin_cache_dir(), os.path.basename(plugin))
    print("Cloning %s -> %s" % (plugin, dirname))
    if os.path.exists(dirname):
        print("Skip cloning of %s. Already there." % plugin)
        return
    create_directory(dirname)
    subprocess.call(["git", "clone", "--recursive",
        "--depth", "1", "https://github.com/%s" % plugin, dirname])

    if plugin == "Valloric/YouCompleteMe":
        ## CLUTCH: this plugin needs something extra.
        subprocess.call(os.path.join(dirname, "./install.sh"), cwd=dirname)

def setup_other_plugins(all_plugins):
    """Creates /tmp/UltiSnips_test_vim_plugins and clones all plugins into this."""
    clone_plugin("tpope/vim-pathogen")
    for plugin in all_plugins:
        clone_plugin(plugin)

if __name__ == '__main__':
    import optparse

    def parse_args():
        p = optparse.OptionParser("%prog [OPTIONS] <test case names to run>")

        p.set_defaults(session="vim", interrupt=False,
                verbose=False, interface="screen", retries=4, plugins=False)

        p.add_option("-v", "--verbose", dest="verbose", action="store_true",
            help="print name of tests as they are executed")
        p.add_option("--clone-plugins", action="store_true",
            help="Only clones dependant plugins and exits the test runner.")
        p.add_option("--plugins", action="store_true",
            help="Run integration tests with other Vim plugins.")
        p.add_option("--interface", type=str,
                help="interface to vim to use on Mac and or Linux [screen|tmux].")
        p.add_option("-s", "--session", dest="session",  metavar="SESSION",
            help="session parameters for the terminal multiplexer SESSION [%default]")
        p.add_option("-i", "--interrupt", dest="interrupt",
            action="store_true",
            help="Stop after defining the snippet. This allows the user " \
             "to interactively test the snippet in vim. You must give " \
             "exactly one test case on the cmdline. The test will always fail."
        )
        p.add_option("-r", "--retries", dest="retries", type=int,
                help="How often should each test be retried before it is "
                "considered failed. Works around flakyness in the terminal "
                "multiplexer and race conditions in writing to the file system.")

        o, args = p.parse_args()
        if o.interface not in ("screen", "tmux"):
            p.error("--interface must be [screen|tmux].")

        return o, args

    def flatten_test_suite(suite):
        flatten = unittest.TestSuite()
        for test in suite:
            if isinstance(test, unittest.TestSuite):
                flatten.addTests(flatten_test_suite(test))
            else:
                flatten.addTest(test)
        return flatten

    def main():
        options,selected_tests = parse_args()

        all_test_suites = unittest.defaultTestLoader.discover(start_dir="test")

        vim = None
        if not options.clone_plugins:
            if platform.system() == "Windows":
                raise RuntimeError("TODO: TestSuite is broken under windows. Volunteers wanted!.")
                # vim = VimInterfaceWindows()
                vim.focus()
            else:
                if options.interface == "screen":
                    vim = VimInterfaceScreen(options.session)
                elif options.interface == "tmux":
                    vim = VimInterfaceTmux(options.session)

        all_other_plugins = set()

        tests = set()
        suite = unittest.TestSuite()

        for test in flatten_test_suite(all_test_suites):
            test.interrupt = options.interrupt
            test.retries = options.retries
            test.test_plugins = options.plugins
            test.vim = vim
            all_other_plugins.update(test.plugins)

            if len(selected_tests):
                id = test.id().split('.')[1]
                if not any([ id.startswith(t) for t in selected_tests ]):
                    continue
            tests.add(test)
        suite.addTests(tests)

        if options.plugins or options.clone_plugins:
            setup_other_plugins(all_other_plugins)
            if options.clone_plugins:
                return

        v = 2 if options.verbose else 1
        res = unittest.TextTestRunner(verbosity=v).run(suite)

    main()

# vim:fileencoding=utf-8:foldmarker={{{#,#}}}: