from AddFeed import AddFeed
from DisplayModel import DisplayModel
from Feed import Feed
from FeedEntry import FeedEntry
from PyQt4 import QtGui
from PyQt4.QtCore import QUrl
from PyQt4.QtGui import QFont
from Ui_MainWindow import Ui_MainWindow
import FeedUpdater
import subprocess

class MainWindow(QtGui.QMainWindow):
    def __init__(self, session=None):
        QtGui.QWidget.__init__(self, None)
        self.session = session
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.updateFeedList()
        self.initFeedEntryList()
        
    def updateFeedList(self):        
        self.allFeeds = Feed.all(self.session)
        feedModel = DisplayModel(self, self.allFeeds, Feed.userPresentableString)
        self.ui.feedList.setModel(feedModel)
        self.ui.feedList.update()

    def initFeedEntryList(self):
        self.ui.feedEntryList.setItemDelegate(FeedEntryItemDelegate())

    def feedSelected(self, index):
        self.selectedFeed = self.allFeeds[index.row()]
        self.sortedEntries = self.selectedFeed.entriesSortedByUpdateDate()
        model = DisplayModel(self, self.sortedEntries, FeedEntry.userPresentableString)
        self.ui.feedEntryList.setModel(model)
        self.ui.feedEntryList.itemDelegate().entries = self.sortedEntries
        self.ui.feedEntryList.update()
        
    def feedEntrySelected(self, index):
        row = index.row()
        self.selectedEntry = self.sortedEntries[row]
        baseUrl = QUrl(self.selectedEntry.link) # TODO this is the wrong base url, figure out the correct one
        self.ui.webView.setHtml(self.selectedEntry.summary, baseUrl)
    
    def toggleReadOnSelectedEntry(self):
        self.selectedEntry.toggleRead()
        self.session.commit()
        self.ui.feedList.update()
    
    def addFeed(self):
        addFeed = AddFeed(self.session)
        success = addFeed.exec_()
        if success:
            url = addFeed.getUrl()
            FeedUpdater.createNewFeed(url, self.session)
            # TODO get status from feedUpdater and display in status area of the main window
            self.updateFeedList()

    def openSelectedEntry(self):
        # TODO make browser configurable
        browser = "/usr/local/bin/opera"
        subprocess.Popen([browser, self.selectedEntry.link])

class FeedEntryItemDelegate(QtGui.QStyledItemDelegate):
    def __init__(self):
        QtGui.QStyledItemDelegate.__init__(self, None)
    
    def paint(self, painter, style, index):
        row = index.row()
        entry = self.entries[row]
        if entry.read:
            style.font.setWeight(QFont.Normal)
        else:
            style.font.setWeight(QFont.Bold)
        QtGui.QStyledItemDelegate.paint(self, painter, style, index)