import os
import time
import logging
import sys
import yaml
import asyncio
import shutil
import tempfile
import zipfile
from distutils import dir_util

from app.classes.shared.helpers import helper
from app.classes.shared.console import console

from app.classes.shared.models import db_helper, server_permissions, Enum_Permissions_Server, crafty_permissions, Enum_Permissions_Crafty

from app.classes.shared.server import Server
from app.classes.minecraft.server_props import ServerProps
from app.classes.minecraft.serverjars import server_jar_obj
from app.classes.minecraft.stats import Stats

logger = logging.getLogger(__name__)


class Controller:

    def __init__(self):
        self.servers_list = []
        self.stats = Stats(self)

    def check_server_loaded(self, server_id_to_check: int):

        logger.info("Checking to see if we already registered {}".format(server_id_to_check))

        for s in self.servers_list:
            known_server = s.get('server_id')
            if known_server is None:
                return False

            if known_server == server_id_to_check:
                logger.info('skipping initialization of server {} because it is already loaded'.format(server_id_to_check))
                return True

        return False

    def init_all_servers(self):

        servers = db_helper.get_all_defined_servers()

        for s in servers:
            server_id = s.get('server_id')

            # if we have already initialized this server, let's skip it.
            if self.check_server_loaded(server_id):
                continue

            # if this server path no longer exists - let's warn and bomb out
            if not helper.check_path_exists(s['path']):
                logger.warning("Unable to find server {} at path {}. Skipping this server".format(s['server_name'],
                                                                                                  s['path']))

                console.warning("Unable to find server {} at path {}. Skipping this server".format(s['server_name'],
                                                                                                   s['path']))
                continue

            settings_file = os.path.join(s['path'], 'server.properties')

            # if the properties file isn't there, let's warn
            if not helper.check_file_exists(settings_file):
                logger.error("Unable to find {}. Skipping this server.".format(settings_file))
                console.error("Unable to find {}. Skipping this server.".format(settings_file))
                continue

            settings = ServerProps(settings_file)

            temp_server_dict = {
                'server_id': s.get('server_id'),
                'server_data_obj': s,
                'server_obj': Server(self.stats),
                'server_settings': settings.props
            }

            # setup the server, do the auto start and all that jazz
            temp_server_dict['server_obj'].do_server_setup(s)

            # add this temp object to the list of init servers
            self.servers_list.append(temp_server_dict)

            console.info("Loaded Server: ID {} | Name: {} | Autostart: {} | Delay: {} ".format(
                s['server_id'],
                s['server_name'],
                s['auto_start'],
                s['auto_start_delay']
            ))

    def refresh_server_settings(self, server_id: int):
        server_obj = self.get_server_obj(server_id)
        server_obj.reload_server_settings()

    def get_server_settings(self, server_id):
        for s in self.servers_list:
            if int(s['server_id']) == int(server_id):
                return s['server_settings']

        logger.warning("Unable to find server object for server id {}".format(server_id))
        return False

    def get_server_obj(self, server_id):
        for s in self.servers_list:
            if int(s['server_id']) == int(server_id):
                return s['server_obj']

        logger.warning("Unable to find server object for server id {}".format(server_id))
        return False
        
    def get_server_data(self, server_id):
        for s in self.servers_list:
            if int(s['server_id']) == int(server_id):
                return s['server_data_obj']

        logger.warning("Unable to find server object for server id {}".format(server_id))
        return False

    @staticmethod
    def list_defined_servers():
        servers = db_helper.get_all_defined_servers()
        return servers
        
    @staticmethod
    def list_defined_permissions():
        permissions_list = server_permissions.get_permissions_list()
        return permissions_list
        
    @staticmethod
    def list_defined_crafty_permissions():
        permissions_list = crafty_permissions.get_permissions_list()
        return permissions_list
        
    @staticmethod
    def get_mask_permissions(role_id, server_id):
        permissions_mask = db_helper.get_permissions_mask(role_id, server_id)
        return permissions_mask
        
    @staticmethod
    def get_role_permissions(role_id):
        permissions_list = db_helper.get_role_permissions_list(role_id)
        return permissions_list

    @staticmethod
    def get_server_permissions_foruser(user_id, server_id):
        permissions_list = db_helper.get_user_permissions_list(user_id, server_id)
        return permissions_list        

    @staticmethod
    def get_mask_crafty_permissions(user_id):
        permissions_mask = db_helper.get_crafty_permissions_mask(user_id)
        return permissions_mask
        
    @staticmethod
    def get_crafty_permissions(user_id):
        permissions_list = db_helper.get_crafty_permissions_list(user_id)
        return permissions_list
        
    @staticmethod
    def can_create_server(user_id):
        return db_helper.can_add_in_crafty(user_id, Enum_Permissions_Crafty.Server_Creation)
        
    @staticmethod
    def can_add_user(user_id):
        #TODO: Complete if we need a User Addition limit
        #return db_helper.can_add_in_crafty(user_id, Enum_Permissions_Crafty.User_Config)
        return True

    @staticmethod
    def can_add_role(user_id):
        #TODO: Complete if we need a Role Addition limit
        #return db_helper.can_add_in_crafty(user_id, Enum_Permissions_Crafty.Roles_Config)
        return True

    @staticmethod
    def list_all_crafty_permissions_quantity_limits():
        return db_helper.get_all_permission_quantity_list()

    @staticmethod
    def list_crafty_permissions_quantity_limits(user_id):
        return db_helper.get_permission_quantity_list(user_id)
        
    @staticmethod
    def get_crafty_permissions(user_id):
        permissions_list = db_helper.get_crafty_permissions_list(user_id)
        return permissions_list
        
    @staticmethod
    def get_crafty_permissions(user_id):
        permissions_list = db_helper.get_crafty_permissions_list(user_id)
        return permissions_list

    @staticmethod
    def list_authorized_servers(userId):
        server_list = db_helper.get_authorized_servers(userId)
        return server_list

    def list_running_servers(self):
        running_servers = []

        # for each server
        for s in self.servers_list:

            # is the server running?
            srv_obj = s['server_obj']
            running = srv_obj.check_running()
            # if so, let's add a dictionary to the list of running servers
            if running:
                running_servers.append({
                    'id': srv_obj.server_id,
                    'name': srv_obj.name
                })

        return running_servers

    def stop_all_servers(self):
        servers = self.list_running_servers()
        logger.info("Found {} running server(s)".format(len(servers)))
        console.info("Found {} running server(s)".format(len(servers)))

        logger.info("Stopping All Servers")
        console.info("Stopping All Servers")

        for s in servers:
            logger.info("Stopping Server ID {} - {}".format(s['id'], s['name']))
            console.info("Stopping Server ID {} - {}".format(s['id'], s['name']))

            self.stop_server(s['id'])

            # let's wait 2 seconds to let everything flush out
            time.sleep(2)

        logger.info("All Servers Stopped")
        console.info("All Servers Stopped")

    def stop_server(self, server_id):
        # get object
        svr_obj = self.get_server_obj(server_id)
        svr_data = self.get_server_data(server_id)
        server_name = svr_data['server_name']

        running = svr_obj.check_running()

        # issue the stop command
        svr_obj.stop_threaded_server()

        # while it's running, we wait
        x = 0
        while running:
            logger.info("Server {} is still running - waiting 2s to see if it stops".format(server_name))
            console.info("Server {} is still running - waiting 2s to see if it stops".format(server_name))
            running = svr_obj.check_running()

            # let's keep track of how long this is going on...
            x = x + 1

            # if we have been waiting more than 120 seconds. let's just kill the pid
            if x >= 60:
                logger.error("Server {} is taking way too long to stop. Killing this process".format(server_name))
                console.error("Server {} is taking way too long to stop. Killing this process".format(server_name))

                svr_obj.killpid(svr_obj.PID)
                running = False

            # if we killed the server, let's clean up the object
            if not running:
                svr_obj.cleanup_server_object()

    def create_jar_server(self, server: str, version: str, name: str, min_mem: int, max_mem: int, port: int):
        server_id = helper.create_uuid()
        server_dir = os.path.join(helper.servers_dir, server_id)
        backup_path = os.path.join(helper.backup_path, server_id)

        server_file = "{server}-{version}.jar".format(server=server, version=version)
        full_jar_path = os.path.join(server_dir, server_file)

        # make the dir - perhaps a UUID?
        helper.ensure_dir_exists(server_dir)
        helper.ensure_dir_exists(backup_path)

        try:
            # do a eula.txt
            with open(os.path.join(server_dir, "eula.txt"), 'w') as f:
                f.write("eula=true")
                f.close()

            # setup server.properties with the port
            with open(os.path.join(server_dir, "server.properties"), "w") as f:
                f.write("server-port={}".format(port))
                f.close()

        except Exception as e:
            logger.error("Unable to create required server files due to :{}".format(e))
            return False

        server_command = 'java -Xms{}M -Xmx{}M -jar {} nogui'.format(helper.float_to_string(min_mem),
                                                                     helper.float_to_string(max_mem),
                                                                     full_jar_path)
        server_log_file = "{}/logs/latest.log".format(server_dir)
        server_stop = "stop"

        # download the jar
        server_jar_obj.download_jar(server, version, full_jar_path, name)

        new_id = self.register_server(name, server_id, server_dir, backup_path, server_command, server_file, server_log_file, server_stop)
        return new_id

    @staticmethod
    def verify_jar_server( server_path: str, server_jar: str):
        path_check = helper.check_path_exists(server_path)
        jar_check = helper.check_file_exists(os.path.join(server_path, server_jar))
        if not path_check or not jar_check:
            return False
        return True

    @staticmethod
    def verify_zip_server(zip_path: str):
        zip_check = helper.check_file_exists(zip_path)
        if not zip_check:
            return False
        return True

    def import_jar_server(self, server_name: str, server_path: str, server_jar: str, min_mem: int, max_mem: int, port: int):
        server_id = helper.create_uuid()
        new_server_dir = os.path.join(helper.servers_dir, server_id)
        backup_path = os.path.join(helper.backup_path, server_id)

        helper.ensure_dir_exists(new_server_dir)
        helper.ensure_dir_exists(backup_path)
        dir_util.copy_tree(server_path, new_server_dir)

        full_jar_path = os.path.join(new_server_dir, server_jar)
        server_command = 'java -Xms{}M -Xmx{}M -jar {} nogui'.format(helper.float_to_string(min_mem),
                                                                     helper.float_to_string(max_mem),
                                                                     full_jar_path)
        server_log_file = "{}/logs/latest.log".format(new_server_dir)
        server_stop = "stop"

        new_id = self.register_server(server_name, server_id, new_server_dir, backup_path, server_command, server_jar,
                                      server_log_file, server_stop, port)
        return new_id

    def import_zip_server(self, server_name: str, zip_path: str, server_jar: str, min_mem: int, max_mem: int, port: int):
        server_id = helper.create_uuid()
        new_server_dir = os.path.join(helper.servers_dir, server_id)
        backup_path = os.path.join(helper.backup_path, server_id)

        if helper.check_file_perms(zip_path):
            helper.ensure_dir_exists(new_server_dir)
            helper.ensure_dir_exists(backup_path)
            tempDir = tempfile.mkdtemp()
            with zipfile.ZipFile(zip_path, 'r') as zip_ref:
                zip_ref.extractall(tempDir)
                for i in range(len(zip_ref.filelist)):
                    if len(zip_ref.filelist) > 1 or not zip_ref.filelist[i].filename.endswith('/'):
                        test = zip_ref.filelist[i].filename
                        break
                path_list = test.split('/')
                root_path = path_list[0]
                if len(path_list) > 1:
                    for i in range(len(path_list)-2):
                        root_path = os.path.join(root_path, path_list[i+1])

                full_root_path = os.path.join(tempDir, root_path)

                has_properties = False
                for item in os.listdir(full_root_path):
                    if str(item) == 'server.properties':
                        has_properties = True
                    try:
                        shutil.move(os.path.join(full_root_path, item), os.path.join(new_server_dir, item))
                    except Exception as ex:
                        logger.error('ERROR IN ZIP IMPORT: {}'.format(ex))
                if not has_properties:
                    logger.info("No server.properties found on zip file import. Creating one with port selection of {}".format(str(port)))
                    with open(os.path.join(new_server_dir, "server.properties"), "w") as f:
                        f.write("server-port={}".format(port))
                        f.close()
                zip_ref.close()
        else:
            return "false"

        full_jar_path = os.path.join(new_server_dir, server_jar)
        server_command = 'java -Xms{}M -Xmx{}M -jar {} nogui'.format(helper.float_to_string(min_mem),
                                                                     helper.float_to_string(max_mem),
                                                                     full_jar_path)
        logger.debug('command: ' + server_command)
        server_log_file = "{}/logs/latest.log".format(new_server_dir)
        server_stop = "stop"

        new_id = self.register_server(server_name, server_id, new_server_dir, backup_path, server_command, server_jar,
                                      server_log_file, server_stop, port)
        return new_id

    def register_server(self, name: str, server_uuid: str, server_dir: str, backup_path: str, server_command: str, server_file: str, server_log_file: str, server_stop: str, server_port=25565):
        # put data in the db
        new_id = db_helper.create_server(name, server_uuid, server_dir, backup_path, server_command, server_file, server_log_file, server_stop, server_port)

        try:
            # place a file in the dir saying it's owned by crafty
            with open(os.path.join(server_dir, "crafty_managed.txt"), 'w') as f:
                f.write(
                    "The server is managed by Crafty Controller.\n Leave this directory/files alone please")
                f.close()

        except Exception as e:
            logger.error("Unable to create required server files due to :{}".format(e))
            return False

        # let's re-init all servers
        self.init_all_servers()

        return new_id

    def remove_server(self, server_id, files):
        counter = 0
        for s in self.servers_list:

            # if this is the droid... im mean server we are looking for...
            if int(s['server_id']) == int(server_id):
                server_data = self.get_server_data(server_id)
                server_name = server_data['server_name']

                logger.info("Deleting Server: ID {} | Name: {} ".format(server_id, server_name))
                console.info("Deleting Server: ID {} | Name: {} ".format(server_id, server_name))

                srv_obj = s['server_obj']
                running = srv_obj.check_running()

                if running:
                    self.stop_server(server_id)
                if files:
                    shutil.rmtree(db_helper.get_server_data_by_id(server_id)['path'])
                # remove the server from the DB
                db_helper.remove_server(server_id)

                # remove the server from servers list
                self.servers_list.pop(counter)

            counter += 1