# -*- coding: utf-8 -*-
#
# PartMgr GUI - Main window
#
# Copyright 2014-2015 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

from partmgr.gui.tree import *
from partmgr.gui.stockitem import *
from partmgr.gui.partselect import *
from partmgr.gui.partstoorder import *
from partmgr.gui.globalstats import *
from partmgr.gui.footprintmanage import *
from partmgr.gui.locationmanage import *
from partmgr.gui.suppliermanage import *
from partmgr.gui.parametermanage import *
from partmgr.gui.pricefetch import *
from partmgr.gui.util import *

from partmgr.core.database import *


class _RightWidget(QWidget):
	def __init__(self, subWidgets, parent=None):
		QWidget.__init__(self, parent)
		self.setLayout(QVBoxLayout())
		self.layout().setContentsMargins(QMargins(10, 0, 5, 0))
		for widget in subWidgets:
			self.layout().addWidget(widget)
		self.layout().addStretch(1)

class PartMgrMainWidget(QWidget):
	def __init__(self, db, parent=None):
		QWidget.__init__(self, parent)
		self.setLayout(QGridLayout(self))
		self.db = db

		self.splitter = QSplitter(Qt.Horizontal, self)
		self.layout().addWidget(self.splitter, 0, 0)

		self.tree = Tree(db, self)
		self.tree.setMinimumWidth(150)
		self.splitter.addWidget(self.tree)

		self.stock = StockItemWidget(self)
		self.editEnable = QCheckBox("Edit", self)

		self.rightWidget = _RightWidget((self.stock, self.editEnable),
						self)
		self.splitter.addWidget(self.rightWidget)

		self.tree.itemChanged.connect(self.itemChanged)
		self.editEnable.stateChanged.connect(self.__editChanged)

	def __editChanged(self, newState):
		self.stock.setProtected(newState != Qt.Checked)

	def itemChanged(self, stockItemId):
		stockItem = None
		if Entity.isValidId(stockItemId):
			stockItem = self.db.getStockItem(stockItemId)
		self.stock.setStockItem(stockItem)
		self.editEnable.setEnabled(bool(stockItem))

	def shutdown(self):
		self.db.close()

	def showGlobalStats(self):
		dlg = GlobalStatsDialog(self.db, self)
		dlg.exec_()

	def showPartsToOrder(self):
		dlg = PartsToOrderDialog(self.db, self)
		dlg.show()

	def manageGlobalParams(self):
		dlg = GlobalParametersManageDialog(self.db, self)
		dlg.edit()
		self.stock.updateData()

	def manageFootprints(self):
		dlg = FootprintManageDialog(self.db, self)
		dlg.edit()
		self.stock.updateData()

	def manageLocations(self):
		dlg = LocationManageDialog(self.db, self)
		dlg.edit()
		self.stock.updateData()

	def manageSuppliers(self):
		dlg = SupplierManageDialog(self.db, self)
		dlg.edit()
		self.stock.updateData()

	def fetchPrices(self):
		dlg = PriceFetchDialog(self.db, self)
		dlg.exec_()
		self.stock.updateData()

class PartMgrMainWindow(QMainWindow):
	def __init__(self, parent=None):
		QMainWindow.__init__(self, parent)

		self.setMenuBar(QMenuBar(self))

		self.fileMenu = QMenu("&File", self)
		self.fileMenu.addAction("&Load database...",
					self.loadDatabase)
		self.fileMenu.addSeparator()
		self.fileMenu.addAction("&Exit", self.close)
		self.menuBar().addMenu(self.fileMenu)

		self.dbMenu = QMenu("&Database", self)
		self.dbMenu.addAction("Manage &footprints...",
				      self.manageFootprints)
		self.dbMenu.addAction("Manage &locations...",
				      self.manageLocations)
		self.dbMenu.addAction("Manage &suppliers...",
				      self.manageSuppliers)
		self.dbMenu.addSeparator()
		self.dbMenu.addAction("Global &parameters...",
				      self.manageGlobalParams)
		self.menuBar().addMenu(self.dbMenu)
		self.dbMenu.addSeparator()
		self.dbMenu.addAction("Update p&rices...",
				      self.fetchPrices)

		self.statMenu = QMenu("&Statistics", self)
		self.statMenu.addAction("Show parts to &order...",
					self.showPartsToOrder)
		self.statMenu.addAction("Show global &statistics...",
					self.showGlobalStats)
		self.menuBar().addMenu(self.statMenu)

		self.__enableDbMenus(False)
		self.updateTitle()

		self.resize(QSize(1000, 470))

	def __enableDbMenus(self, enabled):
		self.dbMenu.setEnabled(enabled)
		self.statMenu.setEnabled(enabled)

	def updateTitle(self, filename=None):
		title = "Part manager v%s" % VERSION_STRING
		if filename:
			title += " - " + filename
		self.setWindowTitle(title)

	def showGlobalStats(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.showGlobalStats()

	def showPartsToOrder(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.showPartsToOrder()

	def manageGlobalParams(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.manageGlobalParams()

	def manageFootprints(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.manageFootprints()

	def manageLocations(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.manageLocations()

	def manageSuppliers(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.manageSuppliers()

	def fetchPrices(self):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.fetchPrices()

	def loadDatabase(self):
		fn, filt = QFileDialog.getSaveFileName(self,
				"Load database", "",
				"PartMgr files (*.pmg);;"
				"All files (*)",
				"", QFileDialog.DontConfirmOverwrite |
				QFileDialog.DontUseNativeDialog)
		if not fn:
			return
		filt = filt.split('(')[1].split(')')[0].strip()
		if filt == "*.pmg":
			if not fn.endswith(".pmg"):
				fn += ".pmg"
		self.loadDatabaseFile(fn)

	def loadDatabaseFile(self, filename):
		try:
			db = Database(filename)
			self.setCentralWidget(PartMgrMainWidget(db, self))
		except PartMgrError as e:
			QMessageBox.critical(self, "Failed to load database",
					     str(e))
			return False
		self.__enableDbMenus(True)
		self.updateTitle(filename)
		return True

	def closeEvent(self, e):
		mainWidget = self.centralWidget()
		if mainWidget:
			mainWidget.shutdown()
			mainWidget.deleteLater()
			self.setCentralWidget(None)