# -*- coding: utf-8 -*-
"""
Created on Mon Jan 28 11:58:09 2013

@author: Daniel
"""
import numpy
from numpy import min,max
import exceptions
from components import *
from structs import *
from pykat.param import Param, putter

class Command(object):
    def __init__(self):
        self.tag = None
        
    def getFinesseText(self):
        """ Base class for individual finesse optical components """    
        raise NotImplementedError("This function is not implemented")
    
    @staticmethod
    def parseFinesseText(text):    
        raise NotImplementedError("This function is not implemented")
    
    def _on_kat_add(self, kat):
        """
        Called when this component has been added to a kat object
        """
        self._kat = kat
        
class cavity(Command):
    def __init__(self, name, c1, n1, c2, n2):
        self.__name = name
        self.__c1 = c1
        self.__c2 = c2
        self.__n1 = n1
        self.__n2 = n2
        
    def getFinesseText(self):
        return 'cav {0} {1} {2} {3} {4}'.format(self.__name, self.__c1, self.__n1, self.__c2, self.__n2);

class gauss(object):
    @staticmethod
    def parseFinesseText(text, kat):  
        values = text.split(" ")
        
        if not values[0].startswith("gauss"):
            raise exceptions.RuntimeError("'{0}' not a valid Finesse gauss command".format(text))
       
class xaxis(Command):
    
    def __init__(self, scale, limits, comp, param, steps, axis_type="xaxis"):
        self._axis_type = axis_type
        
        self.x = putter("x1")
        self.mx = putter("mx1")
        
        if scale == "lin":
            scale = Scale.linear
        elif scale == "log":
            scale = Scale.logarithmic
        elif isinstance(scale, str): 
            # else we have a string but not a recognisable one
            raise exceptions.ValueError("scale argument '{0}' is not valid, must be 'lin' or 'log'".format(scale))
         
        if scale != Scale.linear and scale != Scale.logarithmic:
            raise exceptions.ValueError("scale is not Scale.linear or Scale.logarithmic")            
            
        self.scale = scale
        
        if numpy.size(limits) != 2 :
            raise exceptions.ValueError("limits input should be a 2x1 vector of limits for the xaxis")
            
        self.limits = numpy.array(SIfloat(limits)).astype(float)
        
        if steps <= 0 :
            raise exceptions.ValueError("steps value should be > 0")            
            
        self.steps = int(steps)
        
        # if entered component is a string then just store and use that
        if isinstance(comp, str):
            self.__comp = comp
        elif not isinstance(comp, Component):
            raise exceptions.ValueError("{0} has not been added".format(comp))
        else:
            self.__comp = comp
        
        if isinstance(param, str):
            self.__param = param
        elif not isinstance(param, Param) :
            raise exceptions.ValueError("param argument is not of type Param")
        else:
            self.__param = param
    
    @staticmethod
    def parseFinesseText(text):
        values = text.split(" ")
        
        if values[0] != "xaxis" and values[0] != "xaxis*":
            raise exceptions.RuntimeError("'{0}' not a valid Finesse xaxis command".format(text))
        
        axis_type = values[0]
        
        values.pop(0) # remove initial value
        
        if len(values) != 6:
            raise exceptions.RuntimeError("xaxis Finesse code format incorrect '{0}'".format(text))

        return xaxis(values[2], [values[3], values[4]], values[0], values[1], values[5], axis_type=axis_type)
        
    def getFinesseText(self):
        # store either the component name of the string provided
        comp_name = self.__comp.name if isinstance(self.__comp, Component) else self.__comp
        param_name = self.__param.name if isinstance(self.__param, Param) else self.__param
        
        return '{axis_type} {0} {1} {2} {3} {4} {5}'.format(
                comp_name, param_name, self.scale,
                min(self.limits), max(self.limits), self.steps, axis_type=self._axis_type);
                
class x2axis(xaxis):
    def __init__(self, scale, limits, comp, param, steps):
        xaxis.__init__(self, scale, limits, comp, param, steps, axis_type="x2axis")        
        self.x = putter("x2")
        self.mx = putter("mx2")

    @staticmethod
    def parseFinesseText(text):
        values = text.split(" ")
        
        if values[0] != "x2axis" and values[0] != "x2axis*":
            raise exceptions.RuntimeError("'{0}' not a valid Finesse xaxis command".format(text))
        
        axis_type = values[0]
        
        values.pop(0) # remove initial value
        
        if len(values) != 6:
            raise exceptions.RuntimeError("xaxis Finesse code format incorrect '{0}'".format(text))

        return x2axis(values[2], [values[3], values[4]], values[0], values[1], values[5])