import numpy as np, scipy.optimize
import traceback
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

import phys, file



# global GUI-related shit
class GUI:
	table = None
	monospace = QFont("monospace")
	bigfont = QFont("sans-serif", pointSize=10, weight=1000)



from ui_widgets import *
from ui_table import *

def update():
	for i, pol in enumerate(system.elements):
		row = GUI.table.rows[i]

		if pol.ref is not False:
			pol.angle += system.elements[pol.ref].angle

	system.recalculate()

	I = 1
	for i, pol in enumerate(system.elements):
		row = GUI.table.rows[i]

		# update all the diagrams
		row.ellipse.state = system.states[i]
		row.ellipse.ellipse = system.ellipses[i]
		row.ellipse.is_used = system.elements[i].enable
		row.ellipse.repaint()
		
		text = "%s at %f°" \
			% (pol.type, (pol.angle + pol.delta) * 180 / np.pi) 
		row.info_angle.setText(text)

		state = system.states[i]
		ellipse = system.ellipses[i]

		if state is None:
			I = 1
			row.info_jones.setText("Unpolarized")
		else:
			I = np.abs(state[0] * state[0].conjugate() \
				   + state[1] * state[1].conjugate())

		if state is None:
			continue
		
		A, B = state
		text = "I = %f\n" % I
		text += "%f ∠ %+f°\n%f ∠ %+f°\n" % \
		       (np.abs(A), 180 / np.pi * np.angle(A), \
			np.abs(B), 180 / np.pi * np.angle(B))
		text += "α = %f°\nφ = %+f°" % \
		       (180 / np.pi * ellipse.alpha, 180 / np.pi * ellipse.theta)
		text = text.replace("-", "- ").replace("+", "+ ")
		row.info_jones.setText(text)

	GUI.widok.intensity = I
	GUI.widok.repaint()

	#if GUI.auto_optimize.isChecked():
	#	optimize()

GUI.do_update = update


def half_assed_element_creation(index=None):
	pol = phys.Polarizer("linear")
	if index is None:
		system.elements.append(pol)
	else:
		system.elements.insert(index, pol)

	populate_table()
	GUI.table_frame = QFrame()
	GUI.table_frame.setLayout(GUI.table)
	GUI.scroll.setWidget(GUI.table_frame)

	ElementEditorWindow.open(pol)
	update()

def half_assed_clear():
	ElementEditorWindow.close_all()
	system.elements = list()
	populate_table()
	GUI.table_frame = QFrame()
	GUI.table_frame.setLayout(GUI.table)
	GUI.scroll.setWidget(GUI.table_frame)
	update()

def half_assed_element_deletion(index):
	ElementEditorWindow.close_all(pol=system.elements[pol])
	populate_table()
	GUI.table_frame = QFrame()
	GUI.table_frame.setLayout(GUI.table)
	GUI.scroll.setWidget(GUI.table_frame)
	update()


# FIXME: refactor
#def optimize(which):
#	if len(system.elements) == 0:
#		return
#
#	op_idx = GUI.opt_operand.currentData()
#	op = system.elements[op_idx]
#
#	def I(theta):
#		op.angle = theta
#		if op.ref is not False:
#			op.angle += system.elements[op.ref].angle
#
#		state = None
#		for i, pol in enumerate(system.elements):
#			if i >= len(system.ignore) or not system.ignore[i]:
#				state = pol.mul(state)
#		if state is None:
#			return 1
#		else:
#			return float(np.abs(state[0] * state[0].conjugate() \
#			                    + state[1] * state[1].conjugate()))
#
#	if which == "min":
#		f = I
#	else:
#		f = lambda theta: -I(theta)
#
#	opt = scipy.optimize.minimize_scalar(f, bounds=[0, np.pi], method="bounded")
#	GUI.table_rows[op_idx].optbox.angle.edit.setText("%g" % round(opt.x * 180 / np.pi, 3))

class MainWindow(QMainWindow):
	file_filter = "Wery Omportant Zejta (*.woz)"

	def __init__(self, system_):
		super().__init__()
		self.last_save_path = None

		self.statusBar()
		self.setWindowTitle("Polarizzazione italiana")

		global system
		system = system_

		# Menu
		menu_bar = self.menuBar()
		self.statusBar()

		# Menu - File
		menu = menu_bar.addMenu("&File")

		act =  QAction("&Open system", self)
		act.setShortcut("Ctrl+O")
		act.triggered.connect(self.open_system)
		menu.addAction(act)

		act = QAction("&Save system", self)
		act.setShortcut("Ctrl+S")
		act.triggered.connect(lambda: self.save_system(True))
		menu.addAction(act)

		act = QAction("&Save system as...", self)
		act.triggered.connect(lambda: self.save_system(False))
		menu.addAction(act)

		act = QAction("Exit", self)
		act.setShortcut("Ctrl+Q")
		act.triggered.connect(exit)
		menu.addAction(act)

		# Menu - System
		menu = menu_bar.addMenu("&System")

		act = QAction("&Add a new element", self)
		act.setShortcut("Ctrl+N")
		act.triggered.connect(lambda: half_assed_element_creation())
		menu.addAction(act)

		act = QAction("&Remove all elements", self)
		act.triggered.connect(half_assed_clear)
		menu.addAction(act)

		# Central widget
		root = QVBoxLayout()
		self.setCentralWidget(LayoutWrapper(root))

		box = QHBoxLayout()
		root.addLayout(box)

		# Top bar
		box.addWidget(QLabel("Input intensity"))
		GUI.input_intensity = QLineEdit("%g" % system.input_intensity)
		GUI.input_intensity.textChanged.connect(self.change_input_intensity)
		box.addWidget(GUI.input_intensity)

		# Splitter
		split = QSplitter()
		root.addWidget(split)

		# Table (LHS)
		GUI.table = SystemTable()
		split.addWidget(GUI.table)

		# Splitter RHS
		rhs = QVBoxLayout()
		split.addWidget(LayoutWrapper(rhs))

		Widocques.image = QImage("jones.jpg")
		GUI.widok = Widocques()
		rhs.addWidget(GUI.widok)

		GUI.table.populate(system)
		update()

	def change_input_intensity(self):
		try:
			system.input_intensity = float(GUI.input_intensity.text())
			update()
		except ValueError:
			pass

	def save_system(self,reuse_old):
		global system

		if reuse_old and self.last_save_path:
			path = self.last_save_path
		else:
			path, _ = QFileDialog.getSaveFileName(self, \
		                  filter=MainWindow.file_filter)
			if path == "":
				return

		try:
			file.save_system(path, system)
		except:
			traceback.print_exc()

		self.last_save_path = path

	def open_system(self):
		global system

		path, _ = QFileDialog.getOpenFileName(self, \
		          filter=MainWindow.file_filter)
		if path == "":
			return

		try:
			system = file.open_system(path)
		except:
			traceback.print_exc()

		GUI.table.populate(system)
		GUI.input_intensity.setText("%g" % system.input_intensity)
		GUI.do_update()