import Tkinter
import Tkconstants
import tkFileDialog
import tkMessageBox
import Nsound as ns


class ResampleGUI(Tkinter.Frame):

    def __init__(self, root):
        Tkinter.Frame.__init__(self, root)

        stepOne = Tkinter.LabelFrame(self, text=" WAV Resample: ")
        stepOne.grid(row=0, columnspan=7, sticky='W', padx=5, pady=5, ipadx=5, ipady=5)

        inFileLbl = Tkinter.Label(stepOne, text="Input File Path:")
        inFileLbl.grid(row=0, column=0, sticky='E', padx=5, pady=2)

        self.inFileTxt = Tkinter.Entry(stepOne)
        self.inFileTxt.grid(row=0, column=1, columnspan=7, sticky="WE", pady=3)


        inFileBtn = Tkinter.Button(stepOne, text="Open Wav file ... ", command=self.askopenfilename)
        inFileBtn.grid(row=0, column=8, sticky='W', padx=5, pady=2)

        outFileLbl = Tkinter.Label(stepOne, text="Output File Path:")
        outFileLbl.grid(row=1, column=0, sticky='E', padx=5, pady=2)

        self.outFileTxt = Tkinter.Entry(stepOne)
        self.outFileTxt.grid(row=1, column=1, columnspan=7, sticky="WE", pady=2)

        outFileBtn = Tkinter.Button(stepOne, text="      Resample       ", command=self.asksaveasfilename)
        outFileBtn.grid(row=1, column=8, sticky='W', padx=5, pady=2)

        inEncLbl = Tkinter.Label(stepOne, text="Input File Frequency:")
        inEncLbl.grid(row=2, column=0, sticky='E', padx=5, pady=2)

        self.inFTxt = Tkinter.Entry(stepOne)
        self.inFTxt.grid(row=2, column=1, sticky='E', pady=2)

        outEncLbl = Tkinter.Label(stepOne, text="Output File Frequency:")
        outEncLbl.grid(row=2, column=5, padx=5, pady=2)

        self.outFTxt = Tkinter.Entry(stepOne)
        self.outFTxt.grid(row=2, column=7, pady=2)





        # options for buttons
        button_opt = {'fill': Tkconstants.BOTH, 'padx': 5, 'pady': 5}

        self.file_opt = options = {}

        options['defaultextension'] = '.wav'
        options['filetypes'] = [('WAV', '.wav')]
        options['initialdir'] = 'C:\\'
        options['initialfile'] = 'sound'
        options['parent'] = root
        options['title'] = 'Open Wav file'


    def askopenfilename(self):

        filename = tkFileDialog.askopenfilename(**self.file_opt)

        if filename:
            self.in_field = Tkinter.StringVar()
            self.in_field.set(filename)
            self.inFileTxt['textvariable'] = self.in_field

            fl = str(filename.decode("utf-8"))
            a1 = ns.AudioStream(fl)
            source = a1.getSampleRate()

            self.inF_filed = Tkinter.StringVar()
            self.inF_filed.set(str(float(source)))
            self.inFTxt['textvariable'] = self.inF_filed

            return True

    def asksaveasfilename(self):

        outF = self.outFTxt.get()

        save_filename = tkFileDialog.asksaveasfilename(**self.file_opt)

        #TODO if file exis


        target = float(outF)

        a1 = ns.AudioStream(str(self.inFileTxt.get()))
        source = a1.getSampleRate()

        print "source: %d" %(source)
        print "target: %d" %(target)

        ratio = target / source

        print "ratio:  %f" %(ratio)

        a2 = a1.getResample(ratio)

        a2.setSampleRate(int(target))

        a2 >> str(save_filename)

        tkMessageBox.showinfo("Success! ", "completed!")

        return True

if __name__ == '__main__':

        root = Tkinter.Tk()
        root.wm_title(u"WAV Resampler (C) MKobilev")
        ResampleGUI(root).pack()
        root.mainloop()