import os,sys
sys.path.append('/usr/local/CyberCP')
import django
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "CyberCP.settings")
django.setup()
import CyberCPLogFileWriter as logging
import subprocess
import shlex
from websiteFunctions.models import Websites
from databases.models import Databases
import MySQLdb as mysql
import json
from random import randint
from plogical.processUtilities import ProcessUtilities
import MySQLdb.cursors as cursors
from math import ceil

class mysqlUtilities:

    @staticmethod
    def getPagination(records, toShow):
        pages = float(records) / float(toShow)

        pagination = []
        counter = 1

        if pages <= 1.0:
            pages = 1
            pagination.append(counter)
        else:
            pages = ceil(pages)
            finalPages = int(pages) + 1

            for i in range(1, finalPages):
                pagination.append(counter)
                counter = counter + 1

        return pagination

    @staticmethod
    def recordsPointer(page, toShow):
        finalPageNumber = ((page * toShow)) - toShow
        endPageNumber = finalPageNumber + toShow
        return endPageNumber, finalPageNumber

    @staticmethod
    def setupConnection():
        try:
            passFile = "/etc/cyberpanel/mysqlPassword"

            f = open(passFile)
            data = f.read()
            password = data.split('\n', 1)[0]
            password = password.strip('\n').strip('\r')

            conn = mysql.connect(user='root', passwd=password, cursorclass=cursors.SSCursor)
            cursor = conn.cursor()

            return conn, cursor

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg))
            return 0, 0

    @staticmethod
    def createDatabase(dbname,dbuser,dbpassword):
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            cursor.execute("CREATE DATABASE " + dbname)
            cursor.execute("CREATE USER '" +dbuser+ "'@'localhost' IDENTIFIED BY '"+dbpassword+"'")
            cursor.execute("GRANT ALL PRIVILEGES ON " +dbname+ ".* TO '" +dbuser+ "'@'localhost'")
            connection.close()

            return 1

        except BaseException, msg:
            mysqlUtilities.deleteDatabase(dbname, dbuser)
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[createDatabase]")
            return 0

    @staticmethod
    def deleteDatabase(dbname, dbuser):
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            cursor.execute("DROP DATABASE " + dbname)
            cursor.execute("DROP USER '"+dbuser+"'@'localhost'")
            connection.close()

            return 1

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[deleteDatabase]")
            return str(msg)

    @staticmethod
    def createDatabaseBackup(databaseName,tempStoragePath):
        try:
            passFile = "/etc/cyberpanel/mysqlPassword"

            f = open(passFile)
            data = f.read()
            password = data.split('\n', 1)[0]

            command = 'sudo mysqldump -u root -p'+password+' '+databaseName

            cmd = shlex.split(command)

            with open(tempStoragePath+"/"+databaseName+'.sql', 'w') as f:
                res = subprocess.call(cmd,stdout=f)

            if res == 1:
                logging.CyberCPLogFileWriter.writeToFile("Database: "+databaseName + "could not be backed! [createDatabaseBackup]")
                return 0

            return 1
        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[createDatabaseBackup]")
            return 0

    @staticmethod
    def restoreDatabaseBackup(databaseName, tempStoragePath,dbPassword):
        try:
            passFile = "/etc/cyberpanel/mysqlPassword"

            f = open(passFile)
            data = f.read()
            password = data.split('\n', 1)[0]


            command = 'sudo mysql -u root -p' + password + ' ' + databaseName

            cmd = shlex.split(command)


            with open(tempStoragePath + "/" + databaseName + '.sql', 'r') as f:
                res = subprocess.call(cmd, stdin=f)

            if res == 1:
                logging.CyberCPLogFileWriter.writeToFile("Could not restore MYSQL database: " +databaseName +"! [restoreDatabaseBackup]")
                return 0

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            passwordCMD = "use mysql;SET PASSWORD FOR '" + databaseName + "'@'localhost' = '" + dbPassword + "';FLUSH PRIVILEGES;"

            cursor.execute(passwordCMD)
            connection.close()

            return 1
        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[restoreDatabaseBackup]")

    @staticmethod
    def submitDBCreation(dbName, dbUsername, dbPassword, databaseWebsite):
        try:

            if len(dbName) > 16 or len(dbUsername) > 16:
                raise BaseException("Length of Database name or Database user should be 16 at max.")

            website = Websites.objects.get(domain=databaseWebsite)

            if website.package.dataBases == 0:
                pass
            elif website.package.dataBases > website.databases_set.all().count():
                pass
            else:
                raise BaseException("Maximum database limit reached for this website.")

            if Databases.objects.filter(dbName=dbName).exists() or Databases.objects.filter(dbUser=dbUsername).exists():
                raise BaseException("This database or user is already taken.")

            result = mysqlUtilities.createDatabase(dbName, dbUsername, dbPassword)

            if result == 1:
                pass
            else:
                raise BaseException(result)

            db = Databases(website=website, dbName=dbName, dbUser=dbUsername)
            db.save()

            return 1,'None'

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg))
            return 0,str(msg)

    @staticmethod
    def submitDBDeletion(dbName):
        try:

            databaseToBeDeleted = Databases.objects.get(dbName=dbName)
            result = mysqlUtilities.deleteDatabase(dbName, databaseToBeDeleted.dbUser)

            if result == 1:
                databaseToBeDeleted.delete()
                return 1,'None'
            else:
                return 0,result

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg))
            return 0, str(msg)

    @staticmethod
    def getDatabases(virtualHostName):
        try:
            website = Websites.objects.get(domain=virtualHostName)
            return website.databases_set.all()
        except:
            0

    @staticmethod
    def showStatus():
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            cursor.execute("SHOW GLOBAL STATUS")
            result = cursor.fetchall()

            data = {}
            data['status'] = 1

            for items in result:
                if items[0] == 'Uptime':
                    data['uptime'] = mysqlUtilities.GetTime(items[1])
                elif items[0] == 'Connections':
                    data['connections'] = items[1]
                elif items[0] == 'Slow_queries':
                    data['Slow_queries'] = items[1]

            ## Process List

            cursor.execute("show processlist")
            result = cursor.fetchall()

            json_data = "["
            checker = 0

            for items in result:
                if len(str(items[1])) == 0:
                    database = 'NULL'
                else:
                    database = items[1]

                if len(str(items[6])) == 0:
                    state = 'NULL'
                else:
                    state = items[6]

                if len(str(items[7])) == '':
                    info = 'NULL'
                else:
                    info = items[7]

                dic = {
                    'id': items[0],
                    'user': items[1],
                    'database': database,
                    'command': items[4],
                    'time': items[5],
                    'state': state,
                    'info': info,
                    'progress': items[8],
                }

                if checker == 0:
                    json_data = json_data + json.dumps(dic)
                    checker = 1
                else:
                    json_data = json_data + ',' + json.dumps(dic)

            json_data = json_data + ']'

            data['processes'] = json_data

            ##

            return data

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[showStatus]")
            return 0

    @staticmethod
    def GetTime(seconds):
        time = float(seconds)
        day = time // (24 * 3600)
        time = time % (24 * 3600)
        hour = time // 3600
        time %= 3600
        minutes = time // 60
        time %= 60
        seconds = time

        return ("%d:%d:%d:%d" % (day, hour, minutes, seconds))

    @staticmethod
    def applyMySQLChanges(data):
        try:

            if ProcessUtilities.decideDistro() == ProcessUtilities.centos:
                command = 'sudo mv /etc/my.cnf /etc/my.cnf.bak'
            else:
                command = 'sudo mv /etc/mysql/my.cnf /etc/mysql/my.cnf.bak'
                data['suggestedContent'] = data['suggestedContent'].replace('/var/lib/mysql/mysql.sock', '/var/run/mysqld/mysqld.sock')


            ProcessUtilities.executioner(command)

            ## Temp

            tempPath = "/home/cyberpanel/" + str(randint(1000, 9999))
            writeToFile = open(tempPath, 'w')
            writeToFile.write(data['suggestedContent'])
            writeToFile.close()

            ##
            if ProcessUtilities.decideDistro() == ProcessUtilities.centos:
                command = 'sudo mv ' + tempPath + ' /etc/my.cnf'
            else:
                command = 'sudo mv ' + tempPath + ' /etc/mysql/my.cnf'

            ProcessUtilities.executioner(command)

            return 1, None

        except BaseException, msg:
            if ProcessUtilities.decideDistro() == ProcessUtilities.centos:
                command = 'sudo mv /etc/my.cnf.bak /etc/my.cnf'
            else:
                command = 'sudo mv /etc/mysql/my.cnf.bak /etc/mysql//my.cnf'
            subprocess.call(shlex.split(command))
            logging.CyberCPLogFileWriter.writeToFile(str(msg))
            return 0, str(msg)

    @staticmethod
    def fetchVariables():
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            cursor.execute("SHOW VARIABLES")
            result = cursor.fetchall()

            for items in result:
                logging.CyberCPLogFileWriter.writeToFile(str(items))


            ##

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[showStatus]")
            return 0

    @staticmethod
    def restartMySQL():
        try:
            command = 'sudo systemctl restart mysql'
            ProcessUtilities.executioner(command)

            return 1, None

        except BaseException, msg:
            command = 'sudo mv /etc/my.cnf.bak /etc/my.cnf'
            subprocess.call(shlex.split(command))
            logging.CyberCPLogFileWriter.writeToFile(str(msg))
            return 0, str(msg)

    @staticmethod
    def fetchDatabases():
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            data = {}
            data['status'] = 1

            cursor.execute("SHOW DATABASES")
            result = cursor.fetchall()

            counter = 1
            json_data = "["
            checker = 0

            for items in result:
                if items[0] == 'information_schema' or items[0] == 'mysql' or items[0] == 'performance_schema' or items[
                    0] == 'performance_schema':
                    continue

                dic = {
                    'id': counter,
                    'database': items[0]

                }
                counter = counter + 1

                if checker == 0:
                    json_data = json_data + json.dumps(dic)
                    checker = 1
                else:
                    json_data = json_data + ',' + json.dumps(dic)


            json_data = json_data + ']'
            data['databases'] = json_data
            return data

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[fetchDatabases]")
            return 0

    @staticmethod
    def fetchTables(name):
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            data = {}
            data['status'] = 1

            cursor.execute("use " + name['databaseName'])
            cursor.execute("SHOW TABLE STATUS")
            result = cursor.fetchall()

            counter = 1
            json_data = "["
            checker = 0

            for items in result:

                dic = {
                    'Name': items[0],
                    'Engine': items[1],
                    'Version': items[2],
                    'rowFormat': items[3],
                    'rows': items[4],
                    'Collation': items[14]
                }
                counter = counter + 1

                if checker == 0:
                    json_data = json_data + json.dumps(dic)
                    checker = 1
                else:
                    json_data = json_data + ',' + json.dumps(dic)

            json_data = json_data + ']'
            data['tables'] = json_data
            return data

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[fetchDatabases]")
            return 0

    @staticmethod
    def deleteTable(name):
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            data = {}
            data['status'] = 1

            cursor.execute("use " + name['databaseName'])
            cursor.execute("DROP TABLE " + name['tableName'])

            return data

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[fetchDatabases]")
            return 0

    @staticmethod
    def fetchTableData(name):
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            recordsToShow = int(name['recordsToShow'])
            page = int(name['currentPage'])

            data = {}
            data['status'] = 1

            ##

            cursor.execute("use " + name['databaseName'])
            cursor.execute("select count(*) from " + name['tableName'])
            rows = cursor.fetchall()[0][0]


            ##

            cursor.execute("desc " + name['tableName'])
            result = cursor.fetchall()

            data['completeData'] = '<thead><tr>'

            for items in result:
                data['completeData'] = data['completeData'] + '<th>' + items[0] + '</th>'

            data['completeData'] = data['completeData'] + '</tr></thead>'

            data['completeData'] = data['completeData'] + '<tbody>'

            ##

            data['pagination'] = mysqlUtilities.getPagination(rows, recordsToShow)
            endPageNumber, finalPageNumber = mysqlUtilities.recordsPointer(page, recordsToShow)

            cursor.execute("select * from " + name['tableName'])
            result = cursor.fetchall()

            for items in result[finalPageNumber:endPageNumber]:
                data['completeData'] = data['completeData'] + '<tr>'
                for it in items:
                    data['completeData'] = data['completeData'] + '<td>' + str(it) + '</td>'
                data['completeData'] = data['completeData'] + '</tr>'

            data['completeData'] = data['completeData'] + '</tbody>'

            ##

            return data

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[fetchTableData]")
            return 0

    @staticmethod
    def fetchStructure(name):
        try:

            connection, cursor = mysqlUtilities.setupConnection()

            if connection == 0:
                return 0

            cursor.execute("use " + name['databaseName'])
            cursor.execute("desc " + name['tableName'])
            result = cursor.fetchall()

            ## Columns List

            data = {}
            data['status'] = 1

            json_data = "["
            checker = 0

            for items in result:

                dic = {
                    'Name': items[0],
                    'Type': items[1],
                    'Null': items[2],
                    'Key': items[3],
                    'Default': items[4],
                    'Extra': items[5]
                }

                if checker == 0:
                    json_data = json_data + json.dumps(dic)
                    checker = 1
                else:
                    json_data = json_data + ',' + json.dumps(dic)

            json_data = json_data + ']'

            data['columns'] = json_data

            ##

            return data

        except BaseException, msg:
            logging.CyberCPLogFileWriter.writeToFile(str(msg) + "[showStatus]")
            return 0