import os
import pathlib
import time
import logging
import sys
from peewee import DoesNotExist
import schedule
import yaml
import asyncio
import shutil
import tempfile
import zipfile
from distutils import dir_util
from app.classes.models.management import helpers_management

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

#Importing Models
from app.classes.models.crafty_permissions import crafty_permissions, Enum_Permissions_Crafty
from app.classes.models.servers import servers_helper
#Importing Controllers
from app.classes.controllers.crafty_perms_controller import Crafty_Perms_Controller
from app.classes.controllers.management_controller import Management_Controller
from app.classes.controllers.users_controller import Users_Controller
from app.classes.controllers.roles_controller import Roles_Controller
from app.classes.controllers.server_perms_controller import Server_Perms_Controller
from app.classes.controllers.servers_controller import Servers_Controller

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)
        self.crafty_perms = Crafty_Perms_Controller()
        self.management = Management_Controller()
        self.roles = Roles_Controller()
        self.server_perms = Server_Perms_Controller()
        self.servers = Servers_Controller()
        self.users = Users_Controller()

    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 = self.servers.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(helper.get_os_understandable_path(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(helper.get_os_understandable_path(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)

            if s['auto_start']:
                self.servers.set_waiting_start(s['server_id'], True)

            self.refresh_server_settings(s['server_id'])

            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 = servers_helper.get_all_defined_servers()
        return servers

    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):
        # issue the stop command
        svr_obj = self.get_server_obj(server_id)
        svr_obj.stop_threaded_server()

    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=false")
                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, port)
        return new_id

    @staticmethod
    def verify_jar_server( server_path: str, server_jar: str):
        server_path = helper.get_os_understandable_path(server_path)
        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_path = helper.get_os_understandable_path(zip_path)
        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)
        server_path = helper.get_os_understandable_path(server_path)
        dir_util.copy_tree(server_path, new_server_dir)

        has_properties = False
        for item in os.listdir(new_server_dir):
            if str(item) == 'server.properties':
                has_properties = True
        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()

        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)
        zip_path = helper.get_os_understandable_path(zip_path)

        if helper.check_file_perms(zip_path):
            helper.ensure_dir_exists(new_server_dir)
            helper.ensure_dir_exists(backup_path)
            tempDir = tempfile.mkdtemp()
            has_properties = False
            with zipfile.ZipFile(zip_path, 'r') as zip_ref:
                #extracts archive to temp directory
                zip_ref.extractall(tempDir)
                if len(zip_ref.filelist) > 1:
                    for item in os.listdir(tempDir):
                        if str(item) == 'server.properties':
                            has_properties = True
                        try:
                            shutil.move(os.path.join(tempDir, 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:

                    #iterates list of files
                    for i in range(len(zip_ref.filelist)):
                        #checks if the list of files inside of a dir is greater than 1 or if it's not a directory.
                        if len(zip_ref.filelist) > 1 or not zip_ref.filelist[i].is_dir():
                            #sets local variable to be that filename and we break out of the loop since we found our root dir.
                            test = zip_ref.filelist[i-1].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)

                    
                    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 rename_backup_dir(self, old_server_id, new_server_id, new_uuid):
        server_data = self.servers.get_server_data_by_id(old_server_id)
        old_bu_path = server_data['backup_path']
        Server_Perms_Controller.backup_role_swap(old_server_id, new_server_id)
        backup_path = helper.validate_traversal(helper.backup_path, old_bu_path)
        backup_path_components = list(backup_path.parts)
        backup_path_components[-1] = new_uuid
        new_bu_path = pathlib.PurePath(os.path.join(*backup_path_components))
        if os.path.isdir(new_bu_path):
            if helper.validate_traversal(helper.backup_path, new_bu_path):
                os.rmdir(new_bu_path)
        backup_path.rename(new_bu_path)

    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: int):
        # put data in the db
        new_id = self.servers.create_server(name, server_uuid, server_dir, backup_path, server_command, server_file, server_log_file, server_stop, server_port)
        if not helper.check_file_exists(os.path.join(server_dir, "crafty_managed.txt")):
            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']
                backup_dir = self.servers.get_server_data_by_id(server_id)['backup_path']

                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:
                    try:
                        shutil.rmtree(helper.get_os_understandable_path(self.servers.get_server_data_by_id(server_id)['path']))
                    except Exception as e:
                        logger.error("Unable to delete server files for server with ID: {} with error logged: {}".format(server_id, e))
                    if helper.check_path_exists(self.servers.get_server_data_by_id(server_id)['backup_path']):
                        shutil.rmtree(helper.get_os_understandable_path(self.servers.get_server_data_by_id(server_id)['backup_path']))

                
                #Cleanup scheduled tasks
                try:
                    helpers_management.delete_scheduled_task_by_server(server_id)
                except DoesNotExist:
                    logger.info("No scheduled jobs exist. Continuing.")
                # remove the server from the DB
                self.servers.remove_server(server_id)

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

            counter += 1
        return