from PyQt4 import QtGui
import json
from . import TrackWidget
from projManagement import Validation
import os
#from xml.etree import ElementTree as ET

class SubcircuitTab(QtGui.QWidget):
    """
    This class creates Subcircuit Tab in KicadtoNgspice Window
    It dynamically creates the widget for subcircuits.
    """
    
    def __init__(self, schematicInfo, clarg1):
        kicadFile = clarg1
        (projpath,filename) = os.path.split(kicadFile)
        project_name = os.path.basename(projpath)

        try:
            f = open(os.path.join(projpath,project_name+"_Previous_Values.json"),'r')
            data = f.read()
            json_data = json.loads(data)
        except:
            print("Subcircuit Previous values JSON is Empty")

        QtGui.QWidget.__init__(self)
                     
        #Creating track widget object
        self.obj_trac = TrackWidget.TrackWidget()
        
        #Creating validation object
        self.obj_validation = Validation.Validation()
        #Row and column count
        self.row = 0
        self.count = 1  #Entry count
        self.entry_var = {}
        self.subcircuit_dict_beg = {}   
        self.subcircuit_dict_end = {}  
        #List to hold information about subcircuit
        self.subDetail = {}
        
        #Stores the number of ports in each subcircuit
        self.numPorts = []
                
        #Set Layout
        self.grid = QtGui.QGridLayout()
        self.setLayout(self.grid)
        
        for eachline in schematicInfo:
            words = eachline.split()
            if eachline[0] == 'x':
                print("Subcircuit : Words",words[0])
                self.obj_trac.subcircuitList[project_name+words[0]] = words
                self.subcircuit_dict_beg[words[0]] = self.count
                subbox = QtGui.QGroupBox()
                subgrid = QtGui.QGridLayout()
                subbox.setTitle("Add subcircuit for "+words[len(words)-1])
                self.entry_var[self.count] = QtGui.QLineEdit()
                self.entry_var[self.count].setText("")

                global path_name
                try:
                    for key in json_data["subcircuit"]:
                        if key[0] == eachline[0] and key[1] == eachline[1]:
                            #print "Subcircuit MATCHING---",child.tag[0], child.tag[1], eachline[0], eachline[1]
                            try:
                                if os.path.exists(json_data["subcircuit"][key][0]):
                                    self.entry_var[self.count].setText(json_data["subcircuit"][key][0])
                                    path_name = json_data["subcircuit"][key][0]
                                else:
                                    self.entry_var[self.count].setText("")
                            except:
                                print("Error when set text of subcircuit")
                except:
                    print("Error before subcircuit")


                subgrid.addWidget(self.entry_var[self.count], self.row, 1)
                self.addbtn = QtGui.QPushButton("Add")
                self.addbtn.setObjectName("%d" %self.count)
                #Send the number of ports specified with the given subcircuit for verification.
                #eg. If the line is 'x1 4 0 3 ua741', there are 3 ports(4, 0 and 3).
                self.numPorts.append(len(words)-2)
                print("Number of ports of sub circuit : ",self.numPorts)
                self.addbtn.clicked.connect(self.trackSubcircuit)
                subgrid.addWidget(self.addbtn, self.row, 2)
                subbox.setLayout(subgrid)
                
                #CSS
                subbox.setStyleSheet(" \
                QGroupBox { border: 1px solid gray; border-radius: 9px; margin-top: 0.5em; } \
                QGroupBox::title { subcontrol-origin: margin; left: 10px; padding: 0 3px 0 3px; } \
                ")
                
                self.grid.addWidget(subbox)
                
                #Adding Subcircuit Details
                self.subDetail[self.count] = words[0]
                
                #Increment row and widget count

                if self.entry_var[self.count].text() == "":
                    pass
                else:
                    self.trackSubcircuitWithoutButton(self.count, path_name)

                self.subcircuit_dict_end[words[0]] = self.count
                self.row = self.row + 1
                self.count = self.count + 1
                   
            self.show()
        
                  
    def trackSubcircuit(self):
        """
        This function is use to keep track of all Subcircuit widget
        """
        sending_btn = self.sender()
        #print "Object Called is ",sending_btn.objectName()
        self.widgetObjCount = int(sending_btn.objectName())
        
        self.subfile = str(QtGui.QFileDialog.getExistingDirectory(self,"Open Subcircuit","../SubcircuitLibrary"))
        self.reply = self.obj_validation.validateSub(self.subfile,self.numPorts[self.widgetObjCount - 1])
        if self.reply == "True":
            #Setting Library to Text Edit Line
            self.entry_var[self.widgetObjCount].setText(self.subfile)
            self.subName = self.subDetail[self.widgetObjCount]
            
            #Storing to track it during conversion
            
            self.obj_trac.subcircuitTrack[self.subName] = self.subfile
        elif self.reply == "PORT":
            self.msg = QtGui.QErrorMessage(self)
            self.msg.showMessage("Please select a Subcircuit with correct number of ports.")
            self.msg.setWindowTitle("Error Message")
            self.msg.show()
        elif self.reply == "DIREC":
            self.msg = QtGui.QErrorMessage(self)
            self.msg.showMessage("Please select a valid Subcircuit directory (Containing '.sub' file).")
            self.msg.setWindowTitle("Error Message")
            self.msg.show()

    def trackSubcircuitWithoutButton(self,iter_value,path_value):
        
        self.widgetObjCount = iter_value
        
        self.subfile = path_value
        self.reply = self.obj_validation.validateSub(self.subfile,self.numPorts[self.widgetObjCount - 1])
        if self.reply == "True":
            #Setting Library to Text Edit Line
            self.entry_var[self.widgetObjCount].setText(self.subfile)
            self.subName = self.subDetail[self.widgetObjCount]
            
            #Storing to track it during conversion
            
            self.obj_trac.subcircuitTrack[self.subName] = self.subfile
        elif self.reply == "PORT":
            self.msg = QtGui.QErrorMessage(self)
            self.msg.showMessage("Please select a Subcircuit with correct number of ports.")
            self.msg.setWindowTitle("Error Message")
            self.msg.show()
        elif self.reply == "DIREC":
            self.msg = QtGui.QErrorMessage(self)
            self.msg.showMessage("Please select a valid Subcircuit directory (Containing '.sub' file).")
            self.msg.setWindowTitle("Error Message")
            self.msg.show()