import logging
from datetime import datetime

import allure
import squish
from PIL import ImageGrab

import configs
import driver
from configs.system import IS_LIN
from driver import context
from driver.server import SquishServer
from scripts.utils import system_path, local_system
from scripts.utils.system_path import SystemPath

_logger = logging.getLogger(__name__)


class AUT:
    def __init__(
            self,
            app_path: system_path.SystemPath = configs.APP_DIR,
            user_data: SystemPath = None
    ):
        super(AUT, self).__init__()
        self.path = app_path
        self.ctx = None
        self.pid = None
        self.port = None
        self.aut_id = f'AUT_{datetime.now():%H%M%S}'
        self.app_data = configs.testpath.STATUS_DATA / f'app_{datetime.now():%H%M%S_%f}'
        if user_data is not None:
            user_data.copy_to(self.app_data / 'data')
        driver.testSettings.setWrappersForApplication(self.aut_id, ['Qt'])

    def __str__(self):
        return type(self).__qualname__

    def __enter__(self):
        return self.launch()

    def __exit__(self, exc_type, exc_value, traceback):
        if exc_type:
            screenshot = configs.testpath.RUN / 'screenshot.png'
            if screenshot.exists():
                screenshot = configs.testpath.RUN / f'screenshot_{datetime.now():%H%M%S}.png'
            ImageGrab.grab(xdisplay=":0" if IS_LIN else None).save(screenshot)
            allure.attach(
                name='Screenshot on fail',  body=screenshot.read_bytes(), attachment_type=allure.attachment_type.PNG)
        self.detach().stop()

    @allure.step('Attach Squish to Test Application')
    def attach(self, timeout_sec: int = configs.timeouts.PROCESS_TIMEOUT_SEC, attempt: int = 2):
        if self.ctx is None:
            self.ctx = context.attach(self.aut_id, timeout_sec)
        try:
            squish.setApplicationContext(self.ctx)
        except TypeError as err:
            if attempt:
                return self.attach(timeout_sec, attempt - 1)
            else:
                raise err

    @allure.step('Detach Squish and Application')
    def detach(self):
        if self.ctx is not None:
            squish.currentApplicationContext().detach()
        self.ctx = None
        return self

    @allure.step('Close application')
    def stop(self):
        if self.pid is not None:
            local_system.kill_process(self.pid, verify=True)
            self.pid = None
        if self.port is not None:
            assert driver.waitFor(lambda: local_system.find_process_by_port(self.port) is None,
                                  configs.timeouts.PROCESS_TIMEOUT_SEC), \
                f'Port {self.port} still in use by process: {local_system.find_process_by_port(self.port)}'
            self.port = None

    @allure.step("Start application")
    def launch(self, attempt: int = 2) -> 'AUT':
        try:
            self.port = local_system.find_free_port(configs.squish.AUT_PORT, 1000)
            SquishServer().set_aut_timeout()
            if configs.ATTACH_MODE:
                SquishServer().add_attachable_aut(self.aut_id, self.port)
                command = [
                    configs.testpath.SQUISH_DIR / 'bin' / 'startaut',
                    f'--port={self.port}',
                    f'"{self.path}"',
                    f'-d={self.app_data}'
                ]
                local_system.execute(command)
            else:
                SquishServer().add_executable_aut(self.aut_id, self.path.parent)
                command = [self.aut_id, f'-d={self.app_data}']
                self.ctx = squish.startApplication(' '.join(command), configs.timeouts.PROCESS_TIMEOUT_SEC)

            self.attach()
            self.pid = self.ctx.pid
            assert squish.waitFor(lambda: self.ctx.isRunning, configs.timeouts.PROCESS_TIMEOUT_SEC)
            return self
        except AssertionError as err:
            _logger.debug(err)
            if attempt:
                self.detach().stop()
                return self.launch(attempt-1)
            else:
                raise err


    @allure.step('Restart application')
    def restart(self):
        self.detach().stop()
        self.launch()