import logging
import os
import shutil
import tempfile
from datetime import datetime, time
from mjtest.util.shell import execute
from mjtest.util.utils import get_mjtest_basedir
from typing import Tuple, List


class TestMode:
    syntax = "syntax"

    semantic = "semantic"

    exec = "exec"

""" All 'success' tests of the n.th mode can used as 'success' tests for the n-1.th mode"""
TEST_MODES = [TestMode.syntax, TestMode.semantic, TestMode.exec]

class Environment:

    LOG_LEVELS = {
        "info": logging.INFO,
        "error": logging.ERROR,
        "warn": logging.WARN,
        "debug": logging.DEBUG
    }

    def __init__(self, mode, mj_run: str, tmp_dir: str = "", test_dir: str = "",
                 only_incorrect_tests: bool = False, parallel: bool = False,
                 timeout: int = 30, report_dir: str = "", log_level: str = "warn",
                 produce_no_reports: bool = True, output_incorrect_reports: bool = True):
        self.mode = mode
        self.mj_run_cmd = os.path.realpath(mj_run)

        if tmp_dir:
            self.own_tmp_dir = True
            self.tmp_dir = os.path.abspath(os.path.expandvars(tmp_dir))
            if not os.path.exists(tmp_dir):
                os.mkdir(self.tmp_dir)
        else:
            self.own_tmp_dir = False
            self.tmp_dir = tempfile.mkdtemp("mjtest")

        if test_dir:
            self.test_dir = os.path.abspath(os.path.realpath(test_dir))
        else:
            self.test_dir = os.path.join(get_mjtest_basedir(), "tests")
        if not os.path.exists(self.test_dir):
            os.mkdir(self.test_dir)
            for d in [TestMode.syntax, TestMode.semantic, TestMode.exec]:
                os.mkdir(os.path.join(self.test_dir, d))

        self.only_incorrect_tests = only_incorrect_tests
        self.parallel = parallel
        self.timeout = timeout
        if not produce_no_reports:
            if report_dir:
                self.report_dir = os.path.abspath(os.path.expandvars(report_dir))
                if not os.path.exists(report_dir):
                    os.mkdir(self.report_dir)
            else:
                self.report_dir = os.path.join(get_mjtest_basedir(), "reports")
                if not os.path.exists(self.report_dir):
                    os.mkdir(self.report_dir)
            self.report_dir = os.path.join(self.report_dir, datetime.now().strftime("%d-%m-%y_%H-%M-%S"))
            os.mkdir(self.report_dir)
        else:
            self.report_dir = None
        logging.basicConfig(level=self.LOG_LEVELS[log_level])
        self.produce_reports = not produce_no_reports # type: bool
        self.output_incorrect_reports = True

    def create_tmpfile(self) -> str:
        return os.path.join(self.tmp_dir, str(os.times()))

    def create_tmpdir(self) -> str:
        dir = self.create_tmpfile()
        os.mkdir(dir)
        return dir

    def clean_up(self):
        if not self.own_tmp_dir:
            shutil.rmtree(self.tmp_dir)

    def run_mj_command(self, mode: str, *args: Tuple[str]) -> Tuple[bytes, bytes, int]:
        """
        Execute the MiniJava `run` script with the given arguments.

        :param args: arguments for the MiniJava `run` script
        :return: (out, err, return code)
        """
        mode_flag = {
            TestMode.syntax: "--parsetest"
        }[mode]
        cmd = [self.mj_run_cmd, mode_flag] + list(args)
        return execute(cmd, timeout=self.timeout)

    def run_command(self, cmd: str, *args: Tuple[str]) -> Tuple[bytes, bytes, int]:
        """
        Execute the passend command with its arguments

        :return: (out, err, return code)
        """
        return execute([cmd] + list(args), timeout=self.timeout)