#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
#from tkinter import *
import tkinter as tk
from tkinter import ttk
from PIL import ImageTk, Image 
import numpy as np
import o3000
import cv2
from datetime import datetime


import code # entering the interactive mode at a certain point: code.interact(local=dict(globals(), **locals())), Ctrl+D and the script goes on


IMAGE_WIDTH = 1280
IMAGE_HEIGHT = 960


class ImageLabel(tk.Label):
	def __init__(self, *args, **kwargs):
		super(ImageLabel,self).__init__(*args, **kwargs)
		self.image_update(255*np.ones([IMAGE_HEIGHT,IMAGE_WIDTH,3], dtype=np.uint8))
	
	def image_update(self, image):
		'''
		:param image: A numpy array or a PIL image object, refere to https://pillow.readthedocs.io/en/stable/reference/Image.html
		'''
		if isinstance(image, Image.Image):
			pass
		elif isinstance(image, np.ndarray):
			#code.interact(local=dict(globals(), **locals()))
			image = Image.fromarray(image)
		else:
			raise Exception("illegal image format, must be eighter a numpy array or a PIL image object")
		self._image = ImageTk.PhotoImage(image)
		self.configure(image=self._image)


class StringEntry(tk.Entry):
	def __init__(self, master, *args, **kwargs):
		self._variable = tk.StringVar()
		self.name = ''
		super(StringEntry,self).__init__(master=master,text=self._variable, *args, **kwargs)
	
	@property
	def name(self):
		return self._variable.get()
	
	@name.setter
	def name(self, name):
		self._variable.set(name)

class FloatEntry(tk.Entry):
	def __init__(self, master, scaling = 1.0, *args, **kwargs):
		self._scaling = scaling
		self._variable = tk.StringVar()
		self.value = ''
		vcmd = (master.register(self.validate_digit))
		super(FloatEntry,self).__init__(master=master,text=self._variable, *args, **kwargs,
				validate='all', validatecommand=(vcmd, '%P'))
	@property
	def scaling(self):
		return self._scaling
	@property
	def value(self):
		try:
			return float(self._variable.get())/self.scaling
		except ValueError:
			return None
	@value.setter
	def value(self, value):
		if self.validate_digit(value):
			try:					self._variable.set(float(value)*self.scaling)
			except ValueError as e:	print('FloatEntry ignore value {}, it is not a float'.format(value))
		else:
			print('FloatEntry ignore value {}'.format(value))
	def validate_digit(self, P):
		if P == '':				return True
		try:
			_val = float(P)
			if _val < 0.0:		return False
			else:				return True
		except ValueError:		return False


class ImageControlPanel(tk.Frame):
	def __init__(self, save_fcn, *args, **kwargs):
		super(ImageControlPanel,self).__init__(*args, **kwargs)
		
		tk.Label(self,text='Filename: ').grid(column=0, row=0)
		self.filename_entry = StringEntry(self, bg='white')
		self.filename_entry.grid(column=1, row=0)
		tk.Label(self,text='.tiff').grid(column=2, row=0)
		
		def btn_save_fcn():
			save_fcn(self.filename_entry.name)
		
		self.save_btn = tk.Button(self, text="save", command=btn_save_fcn)
		self.save_btn.grid(column=1, row=1)


class CamControlPanel(tk.Frame):
	def __init__(self, *args, **kwargs):
		super(CamControlPanel,self).__init__(*args, **kwargs)
		
		tk.Label(self, text="Sensitivity:").grid(column=0, row=0)
		self.sensitivity = FloatEntry(self, width=7, bg='white')
		self.sensitivity.grid(column=1, row=0)
		tk.Label(self, text="%").grid(column=2, row=0)
		
		
		tk.Label(self, text="Exposure Time:").grid(column=0, row=1)
		self.exposure_time = FloatEntry(self, scaling=1000.0, width=7, bg='white')
		self.exposure_time.grid(column=1, row=1)
		tk.Label(self, text="ms").grid(column=2, row=1)
		
		def configure():
			o3000.video_xml_send("<camera><set><acquisition><mode>time</mode><time>{:f}</time></acquisition></set></camera>".format(self.exposure_time.value))
			o3000.video_xml_send("<camera><set><acquisition><mode>sensitivity</mode><sensitivity>{:f}</sensitivity></acquisition></set></camera>".format(self.sensitivity.value))
	
		self.btn_configure = tk.Button(self, text="send configuration", command=configure)
		self.btn_configure.grid(column=0, row=3, columnspan=3)
		
		# TODO TODO these are hardcoded default values
		self.exposure_time.value = 0.02
		self.sensitivity.value = 1.5
		configure()
	
	



class AnnotationPanel(tk.Frame):
	_PERSONS = ["nobody", "kris", "stefan", "sophia", "jonas", "juerg", "petar"]
	_PERSONS = ["nobody", "kris", "stefan", "sophia", "jonas", "juerg", "petar"]
	_POSES = ["no pose", "sleeping", "typing", "writting", "tinkering"]
	
	def __init__(self, *args, **kwargs):
		super(AnnotationPanel,self).__init__(*args, **kwargs)
		
		
		tk.Label(self,text='Date:').grid(column=0, row=0)
		self.date_var = tk.StringVar()
		tk.Label(self,textvariable=self.date_var).grid(column=1, row=0)
		
		tk.Label(self,text='Time:').grid(column=0, row=1)
		self.time_var = tk.StringVar()
		tk.Label(self,textvariable=self.time_var).grid(column=1, row=1)
		
		
		tk.Label(self,text='Person:').grid(column=0, row=2, sticky='w')
		self.person_list = tk.Listbox(self, exportselection=False)
		self.person_list.grid(column=0, row=3)
		
		[self.person_list.insert(tk.END, item) for item in self._PERSONS]
		
		tk.Label(self,text='Pose:').grid(column=1, row=2, sticky='w')
		self.pose_list = tk.Listbox(self, selectmode=tk.SINGLE, exportselection=False)
		self.pose_list.grid(column=1, row=3)
		[self.pose_list.insert(tk.END, item) for item in self._POSES]
		
		tk.Label(self,text='Comment: ').grid(column=0, row=4, columnspan=2)
		self.comment_text = tk.Text(self, bg='white', width=50, height=5)
		self.comment_text.grid(column=0, row=5, columnspan=2)
	
	
	
	def _list_selection_get(self, listbox):
		'''
		:param: a tkinter Listbox widget
		:return: text of selected line in the given Listbox widget
		'''
		sel = listbox.curselection()
		if len(sel) == 0:
			return 'unkown'
		elif len(sel) == 1:
			return listbox.get(sel[0],sel[0])[0]
		else:
			raise Exception('only single selection allowed')
	
	def update_date_time(self):
		'''
		Updates annotation information to the current date and time
		'''
		now = datetime.now()
		self.date_var.set(now.strftime("%Y-%m-%d"))
		self.time_var.set(now.strftime("%H:%M:%S"))
	
	@property
	def pose(self):
		'''
		:return: the selected pose name
		'''
		return self._list_selection_get(self.pose_list)
	
	@property
	def person(self):
		'''
		:return: the selected pose name
		'''
		return self._list_selection_get(self.person_list)
	
	@property
	def date(self):
		return self.date_var.get()
	
	@property
	def time(self):
		return self.time_var.get()
	
	@property
	def comment(self):
		return self.comment_text.get(1.0,tk.END)



def annotation_text(filenames, annotation_panel, cam_control_panel):
	'''
	build the annotation text for the annotation file
	'''
	
	ap = annotation_panel
	
	_str  = 'raw camera data (not debayered):              {:s}\n'.format(filenames[0])
	_str += 'color image (without lense calibration):      {:s}\n'.format(filenames[1])
	_str += 'calibrated color image (lense calibrated):    {:s}\n'.format(filenames[2])
	
	_str += '\n'
	
	_str += 'camera:           O-3020 (color, rolling shutter, serial no.: 10030)\n'
	_str += 'lense:            C-Mount 6mm 1/2.7" IR MP, with IR cutoff filter\n'
	_str += 'exposure time:    {:f}s\n'.format(cam_control_panel.exposure_time.value)
	_str += 'sensitivity:      {:f}%'.format(cam_control_panel.sensitivity.value)
	
	_str += '\n'
	
	_str += 'date:             {:s}\n'.format(ap.date)
	_str += 'time:             {:s}\n'.format(ap.time)
	
	_str += '\n'
	
	_str += 'person:           {:s}\n'.format(ap.person)
	_str += 'pose:             {:s}\n'.format(ap.pose)
	_str += 'comment:\n'
	_str += ap.comment[:-1]
	
	return _str


imgs = [None, None, None]

def main():
	o3000.video_init()
	o3000.video_xml_send("<camera><get><model_id></model_id></get></camera>");
	
	
	root = tk.Tk()
	root.title("0-3000 Image Recorder")
	
	# the geometry of the box which will be displayed on the screen
	root.geometry("1700x1000")
	
	image_label = ImageLabel()
	image_label.pack(side=tk.LEFT)
	
	
	control_panel = tk.Frame(root)
	control_panel.pack(side=tk.LEFT)
	
	tk.Label(control_panel, text='').pack(pady=20) # separater, vertical space
	

	tk.Label(control_panel, text='').pack(pady=20) # separater, vertical space
	
	tk.Label(control_panel, text='Camera Configuration').pack(anchor='w')
	cam_control_panel = CamControlPanel(master=control_panel)
	cam_control_panel.pack()
	
	tk.Label(control_panel, text='').pack(pady=20) # separater, vertical space
	
	tk.Label(control_panel, text='Annotation').pack(anchor='w')
	annotation_panel = AnnotationPanel(master=control_panel)
	annotation_panel.pack()
	
	
	def record_image():
		global imgs
		imgs = o3000.video_images_get()
		image = imgs[2]
		image_label.image_update(image)
		annotation_panel.update_date_time()
	
	
	btn_record_image = tk.Button(control_panel, text="record/update image", command=record_image)
	btn_record_image.pack()
	
	
	def save_image():
		ap = annotation_panel
		filenamebase = '{:s}_{:s}'.format(ap.date.strip('-'), ap.time.strip(':'))
		
		filenames = [
				'{:s}_raw.tiff'.format(filenamebase),
				'{:s}_rgb.tiff'.format(filenamebase),
				'{:s}.tiff'.format(filenamebase),
		]
		annotation_filename = '{:s}.txt'.format(filenamebase)
		
		_annotation_text = annotation_text(filenames, annotation_panel, cam_control_panel)
		
		print('save images and annotation file {:s}, annotation:'.format(annotation_filename))
		print(_annotation_text)
		
		for filename,image, in zip(filenames,imgs):
			im = Image.fromarray(image)
			im.save(filename)
		
		with open(annotation_filename,'w') as f:
			f.write(_annotation_text)
	
	
	btn_save_image = tk.Button(control_panel, text="save image", command=save_image)
	btn_save_image.pack()
	
	
	root.mainloop()

if __name__ == '__main__':
	main()