import numpy as np

class Layer:
    def __init__(self, Position):
        self.Position = Position
        
    def detect (self, (phi, theta)):
        """Calculate for a given angles (phi, theta) the hit grid.
        Returns the angles from source to grid edge"""
        
        #define Dummyvalue - necessary for run
        phiHigh = 99
        phiLow = 99
        thetaHigh = 99
        thetaLow = 99
        
        x = np.tan(phi)*self.Position    #calculate position of hit with Layer
        y = np.tan(theta)*self.Position
        if 0 <= x < 50:
            phiHigh = np.arctan(int(x/0.0025+1)*0.0025/self.Position)   #angel for z-axis to upper edge of hit grid
            phiLow = np.arctan(int(x/0.0025)*0.0025/self.Position)      # phi = arctan(opposite/adjacent)
            
        elif -50 < x < 0:
            phiHigh = np.arctan(int(x/0.0025)*0.0025/self.Position)     #np.arctan  (int(x/0.0025)*0.0025/                          self.Position)
            phiLow = np.arctan(int(x/0.0025-1)*0.0025/self.Position)    #^arctan    ^round x to next upper/lower 25 mikrometer      ^adjacent
            
        else:
            return ((None, None), (None, None))				 # if the Layer is not hit, return "None"
            
        if 0 <= y < 50:
            thetaHigh = np.arctan(int(y/0.0025+1)*0.0025/self.Position)
            thetaLow = np.arctan(int(y/0.0025)*0.0025/self.Position)
        
        elif -50 < y < 0:
            thetaHigh = np.arctan(int(y/0.0025)*0.0025/self.Position)
            thetaLow = np.arctan(int(y/0.0025-1)*0.0025/self.Position)
        
        else:
            return ((None, None), (None, None))
        
        return ((phiHigh, phiLow), (thetaHigh, thetaLow))



class Detector:
    
    def __init__ (self):
        """5 Layer of Tracker"""
        self.Layer1 = Layer (100)
        self.Layer2 = Layer (110)
        self.Layer3 = Layer (120)
        self.Layer4 = Layer (130)
        self.Layer5 = Layer (140)
        
    def detect (self, (phi, theta)):
        """Calculate for a given angles (phi, theta) the hitted grid.
        Returns the angles from source to grid edge or "None" if the Layer is not hitted"""
        
        for Layer in [self.Layer1, self.Layer2, self.Layer3, self.Layer4, self.Layer5]:
            if Layer == self.Layer1:                            			#First Time creat numpy array
                result = np.array([Layer.detect((phi, theta))])
                
            else:									#For rest, just add
                result = np.append(result, [Layer.detect((phi, theta))], axis = 0)
        
        return result