#***************************************************************************
#*																		 *
#*   Copyright (c) 2011, 2012											  *  
#*   Jose Luis Cercos Pita <jlcercos@gmail.com>							*  
#*																		 *
#*   This program is free software; you can redistribute it and/or modify  *
#*   it under the terms of the GNU Lesser General Public License (LGPL)	*
#*   as published by the Free Software Foundation; either version 2 of	 *
#*   the License, or (at your option) any later version.				   *
#*   for detail see the LICENCE text file.								 *
#*																		 *
#*   This program is distributed in the hope that it will be useful,	   *
#*   but WITHOUT ANY WARRANTY; without even the implied warranty of		*
#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 *
#*   GNU Library General Public License for more details.				  *
#*																		 *
#*   You should have received a copy of the GNU Library General Public	 *
#*   License along with this program; if not, write to the Free Software   *
#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
#*   USA																   *
#*																		 *
#***************************************************************************

# FreeCAD modules
import FreeCAD as App
import FreeCADGui as Gui
# Qt library
from PyQt4 import QtGui,QtCore
# Module
import SimInstance
from shipUtils import Paths

class TaskPanel:
	def __init__(self):
		self.ui = Paths.modulePath() + "/simCreate/TaskPanel.ui"

	def accept(self):
		form = self.form
		# Read waves data
		w = []
		for i in range(0,form.waves.rowCount() - 1):
			item = form.waves.item(i,0)
			A = item.text().toFloat()[0]
			item = form.waves.item(i,1)
			T = item.text().toFloat()[0]
			item = form.waves.item(i,2)
			phi = item.text().toFloat()[0]
			item = form.waves.item(i,3)
			head = item.text().toFloat()[0]
			w.append([A,T,phi,head])
		obj = App.ActiveDocument.addObject("Part::FeaturePython","ShipSimulation")
		sim = SimInstance.ShipSimulation(obj, 
			  [form.length.value(), form.beam.value(), form.n.value()],
			  w)
		SimInstance.ViewProviderShipSimulation(obj.ViewObject)
		return True

	def reject(self):
		return True

	def clicked(self, index):
		pass

	def open(self):
		pass

	def needsFullSpace(self):
		return True

	def isAllowedAlterSelection(self):
		return False

	def isAllowedAlterView(self):
		return True

	def isAllowedAlterDocument(self):
		return False

	def helpRequested(self):
		pass

	def setupUi(self):
		mw = self.getMainWindow()
		form = mw.findChild(QtGui.QWidget, "TaskPanel")
		form.length = form.findChild(QtGui.QDoubleSpinBox, "Length")
		form.beam = form.findChild(QtGui.QDoubleSpinBox, "Beam")
		form.n = form.findChild(QtGui.QSpinBox, "N")
		form.waves = form.findChild(QtGui.QTableWidget, "Waves")
		self.form = form
		# Initial values
		if self.initValues():
			return True
		self.retranslateUi()
		# Connect Signals and Slots
		QtCore.QObject.connect(form.length, QtCore.SIGNAL("valueChanged(double)"), self.onFS)
		QtCore.QObject.connect(form.beam, QtCore.SIGNAL("valueChanged(double)"), self.onFS)
		QtCore.QObject.connect(form.n, QtCore.SIGNAL("valueChanged(int)"), self.onFS)
		QtCore.QObject.connect(form.waves,QtCore.SIGNAL("cellChanged(int,int)"),self.onWaves);

	def getMainWindow(self):
		"returns the main window"
		# using QtGui.qApp.activeWindow() isn't very reliable because if another
		# widget than the mainwindow is active (e.g. a dialog) the wrong widget is
		# returned
		toplevel = QtGui.qApp.topLevelWidgets()
		for i in toplevel:
			if i.metaObject().className() == "Gui::MainWindow":
				return i
		raise Exception("No main window found")

	def initValues(self):
		""" Set initial values for fields
		"""
		return False

	def retranslateUi(self):
		""" Set user interface locale strings. 
		"""
		self.form.setWindowTitle(QtGui.QApplication.translate("shipsim_create","Create a new ship simulation",
								 None,QtGui.QApplication.UnicodeUTF8))
		self.form.findChild(QtGui.QGroupBox, "FSDataBox").setTitle(QtGui.QApplication.translate("shipsim_create","Free surface",
								 None,QtGui.QApplication.UnicodeUTF8))
		self.form.findChild(QtGui.QLabel, "LengthLabel").setText(QtGui.QApplication.translate("shipsim_create","Length",
								 None,QtGui.QApplication.UnicodeUTF8))
		self.form.findChild(QtGui.QLabel, "BeamLabel").setText(QtGui.QApplication.translate("shipsim_create","Breadth",
								 None,QtGui.QApplication.UnicodeUTF8))
		self.form.findChild(QtGui.QLabel, "NLabel").setText(QtGui.QApplication.translate("shipsim_create","Number of points",
								 None,QtGui.QApplication.UnicodeUTF8))
		self.form.findChild(QtGui.QGroupBox, "WavesDataBox").setTitle(QtGui.QApplication.translate("shipsim_create","Waves",
								 None,QtGui.QApplication.UnicodeUTF8))
		labels = []
		labels.append(QtGui.QApplication.translate("shipsim_create","Amplitude",
					  None,QtGui.QApplication.UnicodeUTF8) + " [m]")
		labels.append(QtGui.QApplication.translate("shipsim_create","Period",
					  None,QtGui.QApplication.UnicodeUTF8) + " [s]")
		labels.append(QtGui.QApplication.translate("shipsim_create","Phase",
					  None,QtGui.QApplication.UnicodeUTF8) + " [rad]")
		labels.append(QtGui.QApplication.translate("shipsim_create","Heading",
					  None,QtGui.QApplication.UnicodeUTF8) + " [deg]")
		self.form.waves.setHorizontalHeaderLabels(labels)

	def onFS(self, value):
		""" Method called when free surface data is changed.
		 @param value Changed value.
		"""
		pass

	def onWaves(self, row, column):
		""" Method called when waves data is changed.
		 @param row Affected row.
		 @param col Affected column.
		"""
		item = self.form.waves.item(row,column)
		# Row deletion
		if column == 0:
			if not item.text():
				self.form.waves.removeRow(row)
		# Ensure that exist one empty item at the end
		nRow = self.form.waves.rowCount()
		if not nRow:
			self.form.waves.setRowCount(1)
		else:
			last = self.form.waves.item(nRow-1,0)
			if last:
				if(last.text() != ''):
					self.form.waves.setRowCount(nRow+1)
		# Fields must be numbers
		for i in range(0,self.form.waves.rowCount()-1):	  # Avoid last row
			for j in range(0,self.form.waves.columnCount()): # Avoid name column
				item = self.form.waves.item(i,j)
				if not item:
					item = QtGui.QTableWidgetItem('0.0')
					self.form.waves.setItem(i,j,item)
					continue
				(number,flag) = item.text().toFloat()
				if not flag:
					item.setText('0.0')

def createTask():
	panel = TaskPanel()
	Gui.Control.showDialog(panel)
	if panel.setupUi():
		Gui.Control.closeDialog(panel)
		return None
	return panel