# -*- coding: utf-8 -*-

import textwrap
import unittest
import sys
import contextlib
import io
import os
import subprocess
import multiprocessing
from typing import List, Dict, Any

from tools import actions_local_runner


if sys.version_info >= (3, 8):
    # actions_local_runner uses asyncio features not available in 3.6, and
    # IsolatedAsyncioTestCase was added in 3.8, so skip testing on
    # unsupported systems
    class TestRunner(unittest.IsolatedAsyncioTestCase):
        def run(self, *args: List[Any], **kwargs: List[Dict[str, Any]]) -> Any:
            return super().run(*args, **kwargs)

        def test_step_extraction(self) -> None:
            fake_job = {
                "steps": [
                    {"name": "test1", "run": "echo hi"},
                    {"name": "test2", "run": "echo hi"},
                    {"name": "test3", "run": "echo hi"},
                ]
            }

            actual = actions_local_runner.grab_specific_steps(["test2"], fake_job)
            expected = [
                {"name": "test2", "run": "echo hi"},
            ]
            self.assertEqual(actual, expected)

        async def test_runner(self) -> None:
            fake_step = {"name": "say hello", "run": "echo hi"}
            f = io.StringIO()
            with contextlib.redirect_stdout(f):
                await actions_local_runner.YamlStep(fake_step, "test", True).run()

            result = f.getvalue()
            self.assertIn("say hello", result)

    class TestEndToEnd(unittest.TestCase):
        expected = [
            "shellcheck: Regenerate workflows",
            "shellcheck: Assert that regenerating the workflows didn't change them",
            "shellcheck: Extract scripts from GitHub Actions workflows",
            "shellcheck: Run ShellCheck",
        ]

        def test_lint(self):
            cmd = ["make", "lint", "-j", str(multiprocessing.cpu_count())]
            proc = subprocess.run(
                cmd, cwd=actions_local_runner.REPO_ROOT, stdout=subprocess.PIPE
            )
            stdout = proc.stdout.decode()

            for line in self.expected:
                self.assertIn(line, stdout)

        def test_quicklint(self):
            cmd = ["make", "quicklint", "-j", str(multiprocessing.cpu_count())]
            proc = subprocess.run(
                cmd, cwd=actions_local_runner.REPO_ROOT, stdout=subprocess.PIPE
            )
            stdout = proc.stdout.decode()

            for line in self.expected:
                self.assertIn(line, stdout)

    class TestQuicklint(unittest.IsolatedAsyncioTestCase):
        test_files = [
            os.path.join("caffe2", "some_cool_file.py"),
            os.path.join("torch", "some_cool_file.py"),
            os.path.join("aten", "some_cool_file.py"),
            os.path.join("torch", "some_stubs.pyi"),
            os.path.join("test.sh"),
        ]
        test_py_files = [
            f for f in test_files if f.endswith(".py") or f.endswith(".pyi")
        ]
        test_sh_files = [f for f in test_files if f.endswith(".sh")]
        maxDiff = None

        def setUp(self, *args, **kwargs):
            for name in self.test_files:
                bad_code = textwrap.dedent(
                    """
                    some_variable = '2'
                    some_variable = None
                    some_variable = 11.2
                """
                ).rstrip("\n")

                with open(name, "w") as f:
                    f.write(bad_code)

        def tearDown(self, *args, **kwargs):
            for name in self.test_files:
                os.remove(name)

        def test_file_selection(self):
            files = actions_local_runner.find_changed_files()
            for name in self.test_files:
                self.assertIn(name, files)

        async def test_flake8(self):
            f = io.StringIO()
            with contextlib.redirect_stdout(f):
                await actions_local_runner.Flake8(self.test_py_files, True).run()

            # Should exclude the caffe2/ file
            expected = textwrap.dedent(
                """
                x flake8
                torch/some_cool_file.py:4:21: W292 no newline at end of file
                aten/some_cool_file.py:4:21: W292 no newline at end of file
            """
            ).lstrip("\n")
            self.assertEqual(expected, f.getvalue())

        async def test_shellcheck(self):
            f = io.StringIO()
            with contextlib.redirect_stdout(f):
                await actions_local_runner.ShellCheck(self.test_sh_files, True).run()

            self.assertIn("SC2148: Tips depend on target shell", f.getvalue())
            self.assertIn("SC2283: Remove spaces around = to assign", f.getvalue())


if __name__ == "__main__":
    unittest.main()