import os
import shutil
import subprocess
from typing import Final, Union

TEST_DIR: Final[str] = os.path.dirname(os.path.realpath(__file__))
WIKIQ: Final[str] = os.path.join(os.path.join(TEST_DIR, ".."), "src/wikiq/__init__.py")
TEST_OUTPUT_DIR: Final[str] = os.path.join(TEST_DIR, "test_output")
BASELINE_DIR: Final[str] = os.path.join(TEST_DIR, "baseline_output")

IKWIKI: Final[str] = "ikwiki-20180301-pages-meta-history"
SAILORMOON: Final[str] = "sailormoon"
TWINPEAKS: Final[str] = "twinpeaks"
REGEXTEST: Final[str] = "regextest"


class WikiqTester:
    def __init__(
        self,
        wiki: str,
        case_name: str,
        suffix: Union[str, None] = None,
        in_compression: str = "bz2",
        baseline_format: str = "tsv",
        out_format: str = "tsv",
    ):
        self.input_file = os.path.join(
            TEST_DIR, "dumps", "{0}.xml.{1}".format(wiki, in_compression)
        )

        basename = "{0}_{1}".format(case_name, wiki)
        if suffix:
            basename = "{0}_{1}".format(basename, suffix)

        self.output = os.path.join(
            TEST_OUTPUT_DIR, "{0}.{1}".format(basename, out_format)
        )

        if os.path.exists(self.output):
            if os.path.isfile(self.output):
                os.remove(self.output)
            else:
                shutil.rmtree(self.output)

        if out_format == "parquet":
            os.makedirs(self.output, exist_ok=True)

        if suffix is None:
            self.wikiq_baseline_name = "{0}.{1}".format(wiki, baseline_format)
            self.wikiq_out_name = "{0}.{1}".format(wiki, out_format)
        else:
            self.wikiq_baseline_name = "{0}_{1}.{2}".format(
                wiki, suffix, baseline_format
            )
            self.wikiq_out_name = "{0}_{1}.{2}".format(wiki, suffix, out_format)

        if case_name is not None:
            self.baseline_file = os.path.join(
                BASELINE_DIR, "{0}_{1}".format(case_name, self.wikiq_baseline_name)
            )

    def call_wikiq(self, *args: str, out: bool = True):
        """
        Calls wikiq with the passed arguments on the input file relevant to the test.
        :param args: The command line arguments to pass to wikiq.
        :param out: Whether to pass an output argument to wikiq.
        :return: The output of the wikiq call.
        """
        if out:
            call = " ".join([WIKIQ, self.input_file, "-o", self.output, "--batch-size", "10", *args])
        else:
            call = " ".join([WIKIQ, self.input_file, "--batch-size", "10", *args])

        print(call)
        return subprocess.check_output(call, stderr=subprocess.PIPE, shell=True)