import ast
import json
import os
import pstats
import shutil
import sys
import tempfile
from io import StringIO
from pathlib import Path
from subprocess import PIPE, Popen

from scrapy.utils.test import get_testenv


class TestCmdline:
    def setup_method(self):
        self.env = get_testenv()
        tests_path = Path(__file__).parent.parent
        self.env["PYTHONPATH"] += os.pathsep + str(tests_path.parent)
        self.env["SCRAPY_SETTINGS_MODULE"] = "tests.test_cmdline.settings"

    def _execute(self, *new_args, **kwargs):
        encoding = sys.stdout.encoding or "utf-8"
        args = (sys.executable, "-m", "scrapy.cmdline", *new_args)
        proc = Popen(args, stdout=PIPE, stderr=PIPE, env=self.env, **kwargs)
        comm = proc.communicate()[0].strip()
        return comm.decode(encoding)

    def test_default_settings(self):
        assert self._execute("settings", "--get", "TEST1") == "default"

    def test_override_settings_using_set_arg(self):
        assert (
            self._execute("settings", "--get", "TEST1", "-s", "TEST1=override")
            == "override"
        )

    def test_profiling(self):
        path = Path(tempfile.mkdtemp())
        filename = path / "res.prof"
        try:
            self._execute("version", "--profile", str(filename))
            assert filename.exists()
            out = StringIO()
            stats = pstats.Stats(str(filename), stream=out)
            stats.print_stats()
            out.seek(0)
            stats = out.read()
            assert str(Path("scrapy", "commands", "version.py")) in stats
            assert "tottime" in stats
        finally:
            shutil.rmtree(path)

    def test_override_dict_settings(self):
        EXT_PATH = "tests.test_cmdline.extensions.DummyExtension"
        EXTENSIONS = {EXT_PATH: 200}
        settingsstr = self._execute(
            "settings",
            "--get",
            "EXTENSIONS",
            "-s",
            "EXTENSIONS=" + json.dumps(EXTENSIONS),
        )
        assert "..." not in settingsstr
        settingsdict = ast.literal_eval(settingsstr)
        assert set(settingsdict.keys()) == set(EXTENSIONS.keys())
        assert settingsdict[EXT_PATH] == 200

    def test_pathlib_path_as_feeds_key(self):
        assert self._execute("settings", "--get", "FEEDS") == json.dumps(
            {"items.csv": {"format": "csv", "fields": ["price", "name"]}}
        )