import os
import subprocess

from unit.applications.proto import TestApplicationProto


class TestApplicationGo(TestApplicationProto):
    @classmethod
    def setUpClass(cls, complete_check=True):
        unit = super().setUpClass(complete_check=False)

        # check go module

        go_app = TestApplicationGo()
        go_app.testdir = unit.testdir
        proc = go_app.prepare_env('empty', 'app')
        if proc and proc.returncode == 0:
            cls.available['modules']['go'] = []

        return unit if not complete_check else unit.complete()

    def prepare_env(self, script, name):
        if not os.path.exists(self.testdir + '/go'):
            os.mkdir(self.testdir + '/go')

        env = os.environ.copy()
        env['GOPATH'] = self.pardir + '/build/go'

        try:
            process = subprocess.Popen(
                [
                    'go',
                    'build',
                    '-o',
                    self.testdir + '/go/' + name,
                    self.current_dir + '/go/' + script + '/' + name + '.go',
                ],
                env=env,
                stderr=subprocess.STDOUT,
            )

            process.communicate()

        except:
            return None

        return process

    def load(self, script, name='app', **kwargs):
        self.prepare_env(script, name)

        self._load_conf(
            {
                "listeners": {"*:7080": {"pass": "applications/" + script}},
                "applications": {
                    script: {
                        "type": "external",
                        "processes": {"spare": 0},
                        "working_directory": self.current_dir
                        + "/go/"
                        + script,
                        "executable": self.testdir + "/go/" + name,
                    }
                },
            },
            **kwargs
        )