from login import hoofdMenu
from PyQt5.QtCore import Qt, QAbstractTableModel, QRegExp
from PyQt5.QtGui import QFont, QPixmap, QRegExpValidator, QIcon
from PyQt5.QtWidgets import QWidget, QTableView, QVBoxLayout, QComboBox,\
     QDialog, QLabel, QGridLayout, QPushButton, QMessageBox, QLineEdit
from sqlalchemy import (Table, Column, Integer, String, Float, MetaData,\
                         create_engine, ForeignKey)
from sqlalchemy.sql import select, insert, update, func, and_

def windowSluit(self, m_email):
    self.close()
    hoofdMenu(m_email)

def ongInvoer():
    msg = QMessageBox()
    msg.setStyleSheet("color: black;  background-color: gainsboro")
    msg.setWindowIcon(QIcon('./images/logos/logo.jpg'))
    msg.setIcon(QMessageBox.Warning)
    msg.setText('Please re-enter incorrect input\nsearch term!')
    msg.setWindowTitle('Enter items per cluster')
    msg.exec_()
    
def geenRecord():
    msg = QMessageBox()
    msg.setStyleSheet("color: black;  background-color: gainsboro")
    msg.setWindowIcon(QIcon('./images/logos/logo.jpg'))
    msg.setIcon(QMessageBox.Warning)
    msg.setText('No record found\ncreate another selection please!')
    msg.setWindowTitle('Enter items per cluster')
    msg.exec_() 

def invoerOK():
    msg = QMessageBox()
    msg.setStyleSheet("color: black;  background-color: gainsboro")
    msg.setIcon(QMessageBox.Information)
    msg.setText('Insert successful')
    msg.setWindowTitle('Enter items per cluster')
    msg.exec_()

def calcBestaat():
    msg = QMessageBox()
    msg.setStyleSheet("color: black;  background-color: gainsboro")
    msg.setIcon(QMessageBox.Information)
    msg.setText('Cluster article line exists\nexisting quantity has been replaced\nby changed quantity!')
    msg.setWindowTitle('Enter items per cluster')
    msg.exec_()
        
def foutCluster():
    msg = QMessageBox()
    msg.setStyleSheet("color: black;  background-color: gainsboro")
    msg.setIcon(QMessageBox.Warning)
    msg.setText('Nonexistent cluster number\nCorrect!')
    msg.setWindowTitle('Enter items per cluster')
    msg.exec_()    

def zoeken(m_email):
    import validZt
    class Widget(QDialog):
        def __init__(self, parent=None):
            super(Widget, self).__init__(parent)
            self.setWindowTitle("Cluster -> Articles scope")
            self.setWindowIcon(QIcon('./images/logos/logo.jpg'))
    
            self.setFont(QFont('Arial', 10))
            
            self.Clusternummer = QLabel()
            clEdit = QLineEdit()
            font = QFont("Arial",10)
            font.setCapitalization(QFont.AllUppercase)
            clEdit.setFont(font)
            reg_ex = QRegExp('^[A-Ka-k]{1}[[A-Za-z]{1}[0-9]{5}')
            input_validator = QRegExpValidator(reg_ex, clEdit)
            clEdit.setValidator(input_validator)
            clEdit.textChanged.connect(self.clChanged)
                                
            self.Keuze = QLabel()
            k0Edit = QComboBox()
            k0Edit.setFixedWidth(320)
            k0Edit.setFont(QFont("Arial",10))
            k0Edit.setStyleSheet("color: black;  background-color: #F8F7EE")
            k0Edit.addItem('                  Search articles')
            k0Edit.addItem('1. All articles')
            k0Edit.addItem('2. Filtered by article number')
            k0Edit.addItem('3. Filtered by article description')
            k0Edit.activated[str].connect(self.k0Changed)
    
            self.Zoekterm = QLabel()
            zktermEdit = QLineEdit()
            zktermEdit.setFixedWidth(210)
            zktermEdit.setFont(QFont("Arial",10))
            reg_ex = QRegExp('^.{0,20}$')
            input_validator = QRegExpValidator(reg_ex, zktermEdit)
            zktermEdit.setValidator(input_validator)
            zktermEdit.textChanged.connect(self.zktermChanged)
     
            grid = QGridLayout()
            grid.setSpacing(20)
                          
            lbl = QLabel()
            pixmap = QPixmap('./images/logos/verbinding.jpg')
            lbl.setPixmap(pixmap)
            grid.addWidget(lbl , 1, 0, 1, 2)
            
            lbl2 = QLabel('Cluster number')
            lbl2.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
            grid.addWidget(lbl2, 2, 0)
            grid.addWidget(clEdit, 2, 1)
            
            grid.addWidget(k0Edit, 3, 0, 1, 2, Qt.AlignRight)
            lbl1 = QLabel('Search term')
            lbl1.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
            grid.addWidget(lbl1, 4, 0)
            grid.addWidget(zktermEdit, 4, 1)
            
            self.setLayout(grid)
            self.setGeometry(500, 300, 150, 150)
            
            grid.addWidget(QLabel('\u00A9 2017 all rights reserved dj.jansen@casema.nl'), 6, 0, 1, 3)
            
            logo = QLabel()
            pixmap = QPixmap('./images/logos/logo.jpg')
            logo.setPixmap(pixmap)
            grid.addWidget(logo , 1, 1, 1, 1, Qt.AlignRight)
   
            applyBtn = QPushButton('Search')
            applyBtn.clicked.connect(self.accept)
    
            grid.addWidget(applyBtn, 5, 1, 1, 1, Qt.AlignRight)
            applyBtn.setFont(QFont("Arial",10))
            applyBtn.setFixedWidth(100)
            applyBtn.setStyleSheet("color: black;  background-color: gainsboro")
            
            cancelBtn = QPushButton('Close')
            cancelBtn.clicked.connect(lambda: windowSluit(self, m_email))
    
            grid.addWidget(cancelBtn, 5, 0, 1, 2, Qt.AlignCenter)
            cancelBtn.setFont(QFont("Arial",10))
            cancelBtn.setFixedWidth(100)
            cancelBtn.setStyleSheet("color: black;  background-color: gainsboro")

        def clChanged(self, text):
            self.Clusternummer.setText(text)
              
        def k0Changed(self, text):
            self.Keuze.setText(text)
            
        def zktermChanged(self, text):
            self.Zoekterm.setText(text)
        
        def returnClusternummer(self):
            return self.Clusternummer.text()
         
        def returnKeuze(self):
            return self.Keuze.text()
        
        def returnZoekterm(self):
            return self.Zoekterm.text()
        
        @staticmethod
        def getData(parent=None):
            dialog = Widget(parent)
            dialog.exec_()
            return [dialog.returnClusternummer(), dialog.returnKeuze(),\
                    dialog.returnZoekterm()]       

    window = Widget()
    data = window.getData()
    zoekterm = ''
    keuze = ''
    metadata = MetaData()
    clusters = Table('clusters', metadata,
        Column('clusterID', Integer, primary_key=True),
        Column('omschrijving', String))
    engine = create_engine('postgresql+psycopg2://postgres@localhost/bisystem')
    con = engine.connect()
    selcl = select([clusters]).where(clusters.c.clusterID == str(data[0]).upper())
    rpcl = con.execute(selcl).first()
    if rpcl:
        momschr = rpcl[1]
    else:
        foutCluster()
        zoeken(m_email)
    if data[0]:
        clusternr = str(data[0]).upper()
    if not data[1] or data[1][0] == ' ':
        ongInvoer()
        zoeken(m_email)
    if not data[1] or data[1][0] == ' ':
        ongInvoer()
        zoeken(m_email)
    elif data[1][0] == '1':
        keuze = '1'
    elif data[1][0] == '2' and validZt.zt(data[2], 2):
        keuze = '2'
        zoekterm = data[2]
    elif data[1][0] == '3' and data[1]:
        keuze = '3'
        zoekterm = data[2]
    else:
        ongInvoer()
        zoeken(m_email)
    toonArtikelen(keuze, zoekterm, m_email, momschr, clusternr)  
    
def toonArtikelen(keuze, zoekterm,m_email,momschr,clusternr):             
    class MyWindow(QDialog):
        def __init__(self, data_list, header, *args):
            QWidget.__init__(self, *args,)
            self.setGeometry(100, 50, 1350, 900)
            self.setWindowTitle('Cluster articles')
            self.setWindowIcon(QIcon('./images/logos/logo.jpg'))
            self.setWindowFlags(self.windowFlags()| Qt.WindowSystemMenuHint |
                              Qt.WindowMinMaxButtonsHint)
            table_model = MyTableModel(self, data_list, header)
            table_view = QTableView()
            table_view.setModel(table_model)
            font = QFont("Arial", 10)
            table_view.setFont(font)
            table_view.resizeColumnsToContents()
            table_view.setSelectionBehavior(QTableView.SelectRows)
            table_view.clicked.connect(showSelection)
            layout = QVBoxLayout(self)
            layout.addWidget(table_view)
            self.setLayout(layout)
    
    class MyTableModel(QAbstractTableModel):
        def __init__(self, parent, mylist, header, *args):
            QAbstractTableModel.__init__(self, parent, *args)
            self.mylist = mylist
            self.header = header
        def rowCount(self, parent):
            return len(self.mylist)
        def columnCount(self, parent):
            return len(self.mylist[0])
        def data(self, index, role):
            veld = self.mylist[index.row()][index.column()]
            if not index.isValid():
                return None
            elif role == Qt.TextAlignmentRole and (type(veld) == float or type(veld) == int):
                return Qt.AlignRight | Qt.AlignVCenter
            elif role != Qt.DisplayRole:
                return None
            if type(veld) == float:
                return '{:12.2f}'.format(veld)
            else:
                return veld
        def headerData(self, col, orientation, role):
            if orientation == Qt.Horizontal and role == Qt.DisplayRole:
                return self.header[col]
            return None
             
    header = ['Article number', 'Description', 'Price', 'Stock', 'Unit',\
              'Minimum stock', 'Order amount', 'Location', 'Group', 'Category', 'Size']
    
    metadata = MetaData()
    
    artikelen = Table('artikelen', metadata,
        Column('artikelID', Integer(), primary_key=True),
        Column('artikelomschrijving', String),
        Column('artikelprijs', Float),
        Column('art_voorraad', Float),
        Column('art_eenheid', String(20)),
        Column('art_min_voorraad', Float),
        Column('art_bestelgrootte', Float),
        Column('locatie_magazijn', String(10)),
        Column('artikelgroep', String),
        Column('categorie', String(10)),
        Column('afmeting', String))     
    engine = create_engine('postgresql+psycopg2://postgres@localhost/bisystem')
    con = engine.connect()
    if keuze == '1':
        sel = select([artikelen]).order_by(artikelen.c.artikelID)
    elif keuze == '2':
        zoekterm = zoekterm+''
        aanv = '200000000'
        suppl = '299999999'
        zoekbegin = (zoekterm+aanv)[0:9]
        zoekeind = (zoekterm+suppl)[0:9]
        sel = select([artikelen]).where(and_(artikelen.c.artikelID >= int(zoekbegin),\
                     artikelen.c.artikelID <= int(zoekeind)))\
                    .order_by(artikelen.c.artikelID)
    elif keuze == '3':
        sel = select([artikelen]).where(artikelen.c.artikelomschrijving.ilike('%'+zoekterm+'%'))\
                              .order_by(artikelen.c.artikelID)
    else:
        ongInvoer()
        zoeken(m_email)
        
    if con.execute(sel).fetchone():
        rp = con.execute(sel)
    else:
        geenRecord()
        zoeken(m_email)
    
    data_list=[]
    for row in rp:
        data_list += [(row)] 
        
    def showSelection(idx):
        artikelnr = idx.data()
        if idx.column() == 0:
            class MainWindow(QDialog):
                def __init__(self):
                    QDialog.__init__(self)
                       
                    grid = QGridLayout()
                    grid.setSpacing(20)
                                
                    self.lbl = QLabel()
                    self.pixmap = QPixmap('./images/logos/verbinding.jpg')
                    self.lbl.setPixmap(self.pixmap)
                    grid.addWidget(self.lbl , 0, 1, 1, 2)
            
                    self.logo = QLabel()
                    self.pixmap = QPixmap('./images/logos/logo.jpg')
                    self.logo.setPixmap(self.pixmap)
                    grid.addWidget(self.logo , 0, 2, 1, 1, Qt.AlignRight)
                                  
                    grid.addWidget(QLabel('Cluster number               '+clusternr+\
                                        '\n'+momschr[:35]), 1, 1, 1, 3)
                        
                    self.setFont(QFont('Arial', 10))
                    grid.addWidget(QLabel('Article number               '+str(artikelnr)), 3, 1, 1, 3)
                                  
                    self.setWindowTitle("Clusters compose")
                    self.setWindowIcon(QIcon('./images/logos/logo.jpg'))
                    self.setFont(QFont('Arial', 10))
               
                    self.Hoeveelheid = QLabel(self)
                    self.Hoeveelheid.setText('Amount ')
                    self.hoev = QLineEdit(self)
                    self.hoev.setFixedWidth(210)
                    reg_ex = QRegExp("^[-+]?[0-9]*\\.?[0-9]+$")
                    input_validator = QRegExpValidator(reg_ex, self.hoev)
                    self.hoev.setValidator(input_validator)
                    
                    grid.addWidget(self.Hoeveelheid, 4, 1)
                    grid.addWidget(self.hoev, 4, 2)
                    
                    grid.addWidget(QLabel('\u00A9 2017 all rights reserved dj.jansen@casema.nl'), 6, 0, 1, 3, Qt.AlignCenter)
                                                
                    self.applyBtn = QPushButton('Insert', self)
                    self.applyBtn.clicked.connect(self.clickMethod)
                    grid.addWidget(self.applyBtn, 5, 2, 1, 1, Qt.AlignRight) 
                    self.applyBtn.setFont(QFont("Arial",10))
                    self.applyBtn.setFixedWidth(100)
                    self.applyBtn.setStyleSheet("color: black;  background-color: gainsboro")
                    
                    self.closeBtn = QPushButton('Close', self)
                    self.closeBtn.clicked.connect(self.close)
                    grid.addWidget(self.closeBtn, 5, 1, 1, 2)
                    self.closeBtn.setFont(QFont("Arial",10))
                    self.closeBtn.setFixedWidth(100)
                    self.closeBtn.setStyleSheet("color: black;  background-color: gainsboro")
                    
                    self.setLayout(grid)
                    self.setGeometry(500, 100, 150, 150)
                                   
                def clickMethod(self):
                    mhoev = self.hoev.text()
                    if mhoev == '' or mhoev == '0':
                        return
                    mhoev = float(str(mhoev))
                    
                    metadata = MetaData()
                    
                    cluster_artikelen = Table('cluster_artikelen', metadata,
                        Column('cluster_artID', Integer, primary_key=True),
                        Column('clusterID', None, ForeignKey('clusters.clusterID')),
                        Column('artikelID', None, ForeignKey('artikelen.artikelID')),
                        Column('hoeveelheid', Float))
                    artikelen = Table('artikelen', metadata,
                        Column('artikelID', Integer(), primary_key=True),
                        Column('artikelprijs', Float))
                    clusters = Table('clusters', metadata,
                        Column('clusterID', Integer(), primary_key=True),
                        Column('materialen', Float))
                    engine = create_engine('postgresql+psycopg2://postgres@localhost/bisystem')
                    con = engine.connect()
                    selclart = select([cluster_artikelen]).where(and_(cluster_artikelen\
                      .c.clusterID == clusternr, cluster_artikelen.c.artikelID == artikelnr))
                    rpclart = con.execute(selclart).first()
                    selart = select([artikelen]).where(artikelen.c.artikelID == artikelnr)
                    rpart = con.execute(selart).first()
                    martprijs = rpart[1]
                    updcl = update(clusters).where(clusters.c.clusterID == clusternr).\
                      values(materialen = clusters.c.materialen + martprijs*mhoev)
                    con.execute(updcl)
                    if rpclart:
                        updclart = update(cluster_artikelen).where(and_(cluster_artikelen.c.\
                         clusterID == clusternr, cluster_artikelen.c.artikelID == artikelnr))\
                         .values(hoeveelheid = mhoev)
                        con.execute(updclart)
                        calcBestaat()
                    else:
                        try:
                            mclartnr = (con.execute(select([func.max(cluster_artikelen.c.\
                               cluster_artID, type_=Integer)])).scalar())
                            mclartnr += 1
                        except:
                            mclartnr = 1
                            
                        insclart = insert(cluster_artikelen).values(cluster_artID = mclartnr,\
                        clusterID = clusternr, artikelID = artikelnr, hoeveelheid = mhoev)
                        con.execute(insclart)
                        invoerOK()
                    self.accept()
                    
            mainWin = MainWindow()
            mainWin.exec_()

    win = MyWindow(data_list, header)
    win.exec_()