#! /usr/bin/env python
# coding = utf-8

import uwsgi
import unittest
import os
import fcntl
from shutil import rmtree
import time
from signal import signal, SIGINT
import spooler_priority_constants


def spoolersTaskList():
    # Get the list of tasks
    tasks = [
        os.path.join(s, fn)
        for s in uwsgi.spoolers
        for fn in os.listdir(s)
    ]

    for t in tasks[:]:
        if os.path.isdir(t):
            tasks += [os.path.join(t, fn) for fn in os.listdir(t)]
            tasks.remove(t)

    return tasks


def is_locked(filepath):
    # Check if file is locked
    with open(filepath, "a+") as f:
        try:
            fcntl.lockf(f.fileno(), fcntl.LOCK_EX | fcntl.LOCK_NB)
            is_locked = False
        except IOError:
            is_locked = True
    return is_locked


def lockedTasks(tasklist):
    # List of locked tasks
    return [fp for fp in spoolersTaskList() if is_locked(fp)]


def taskParameters(filepath):
    # Retrieve parameters
    return uwsgi.parsefile(filepath)


def cleanTasks():
    # Clean any remaining task
    for s in uwsgi.spoolers:
        for f in os.listdir(s):
            path = os.path.join(s, f)
            if os.path.isdir(path):
                rmtree(os.path.join(s, f))
            else:
                os.remove(path)


class BitmapTest(unittest.TestCase):

    def setUp(self):
        for priority, name in spooler_priority_constants.tasks:
            task = {'name': name, 'at': int(time.time() + 10)}
            if priority is not None:
                task['priority'] = str(priority)
            uwsgi.spool(task)

    def test_priority(self):
        uwsgi.signal_wait(17)
        print("Signal received.")

        with open(spooler_priority_constants.LOGFILE) as log:
            # Check logging ordering.
            loglines = [line.rstrip() for line in log]
            self.assertEqual(loglines, spooler_priority_constants.ordered_tasks)

signal(SIGINT, cleanTasks)
unittest.main()