"""
A PyQT4 dialog to select specific issue from list
"""

"""
Copyright 2012  Anthony Beville

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

import sys
from PyQt4 import QtCore, QtGui, uic

from PyQt4.QtCore import QUrl
from PyQt4.QtNetwork import QNetworkAccessManager, QNetworkRequest

from comicvinetalker import ComicVineTalker

class IssueSelectionWindow(QtGui.QDialog):
	
	volume_id = 0
	
	def __init__(self, parent, cv_api_key, series_id, issue_number):
		super(IssueSelectionWindow, self).__init__(parent)
		
		uic.loadUi('issueselectionwindow.ui', self)
		
		self.series_id  = series_id
		self.cv_api_key = cv_api_key

		if issue_number is None or issue_number == "":
			self.issue_number = 1
		else:
			self.issue_number = issue_number

		self.initial_id = None
		self.performQuery()
		
		self.twList.resizeColumnsToContents()	
		self.twList.currentItemChanged.connect(self.currentItemChanged)	
		self.twList.cellDoubleClicked.connect(self.cellDoubleClicked)
		
		#now that the list has been sorted, find the initial record, and select it
		if self.initial_id is None:
			self.twList.selectRow( 0 )
		else:
			for r in range(0, self.twList.rowCount()):
				issue_id, b = self.twList.item( r, 0 ).data( QtCore.Qt.UserRole ).toInt()
				if (issue_id == self.initial_id):
					self.twList.selectRow( r )
					break
		

	def performQuery( self ):
		
		while self.twList.rowCount() > 0:
			self.twList.removeRow(0)
		
		comicVine = ComicVineTalker( self.cv_api_key )
		volume_data = comicVine.fetchVolumeData( self.series_id )
		self.issue_list = volume_data['issues']

		self.twList.setSortingEnabled(False)

		row = 0
		for record in self.issue_list: 
			self.twList.insertRow(row)
			
			item_text = record['issue_number']  
			item = QtGui.QTableWidgetItem(item_text)			
			item.setData( QtCore.Qt.UserRole ,record['id'])
			item.setData(QtCore.Qt.DisplayRole, float(item_text))
			item.setFlags(QtCore.Qt.ItemIsSelectable| QtCore.Qt.ItemIsEnabled)
			self.twList.setItem(row, 0, item)
			
			item_text = u"{0}".format(record['name'])  
			item = QtGui.QTableWidgetItem(item_text)			
			item.setFlags(QtCore.Qt.ItemIsSelectable| QtCore.Qt.ItemIsEnabled)
			self.twList.setItem(row, 1, item)
			
			record['url'] = None  
			
			if float(record['issue_number']) == float(self.issue_number):
				self.initial_id = record['id']
			
			row += 1
			
		#TODO look for given issue in list, and select that one

		self.twList.setSortingEnabled(True)
		self.twList.sortItems( 0 , QtCore.Qt.AscendingOrder )

	def cellDoubleClicked( self, r, c ):
		self.accept()
			
	def currentItemChanged( self, curr, prev ):

		if curr is None:
			return
		if prev is not None and prev.row() == curr.row():
				return

		
		self.issue_id, b = self.twList.item( curr.row(), 0 ).data( QtCore.Qt.UserRole ).toInt()

		# list selection was changed, update the the issue cover
		for record in self.issue_list: 
			if record['id'] == self.issue_id:
				
				self.issue_number = record['issue_number']
				
				# We don't yet have an image URL for this issue.  Make a request for URL, and hold onto it
				# TODO: this should be reworked...  too much UI latency, maybe chain the NAMs??
				if record['url'] == None:
					record['url'], dummy = ComicVineTalker( self.cv_api_key ).fetchIssueCoverURLs( self.issue_id )				
				
				self.labelThumbnail.setText("loading...")
				self.nam = QNetworkAccessManager()

				self.nam.finished.connect(self.finishedImageRequest)
				self.nam.get(QNetworkRequest(QUrl(record['url'])))
				break

	# called when the image is done loading
	def finishedImageRequest(self, reply):
		img = QtGui.QImage()
		img.loadFromData(reply.readAll())
		self.labelThumbnail.setPixmap(QtGui.QPixmap(img))