# Copyright: Damien Elmes <anki@ichi2.net>
# -*- coding: utf-8 -*-
# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys, re
import aqt.forms
import anki
from anki.facts import Fact
from anki.errors import *
from anki.utils import stripHTML, parseTags
from aqt.utils import saveGeom, restoreGeom, showWarning, askUser
from anki.sound import clearAudioQueue
from anki.hooks import addHook, removeHook
from anki.utils import stripHTMLMedia, isMac
import aqt.editor, aqt.modelchooser

class AddCards(QDialog):

    def __init__(self, mw):
        QDialog.__init__(self, mw)
        self.mw = mw
        self.form = aqt.forms.addcards.Ui_Dialog()
        self.form.setupUi(self)
        self.setWindowTitle(_("Add"))
        self.setMinimumHeight(400)
        self.setMinimumWidth(500)
        self.setupChooser()
        self.setupEditor()
        self.setupButtons()
        self.onReset()
        self.history = []
        self.forceClose = False
        restoreGeom(self, "add")
        addHook('reset', self.onReset)
        addHook('currentModelChanged', self.onReset)
        self.mw.requireReset(modal=True)
        self.open()
        self.setupNewFact()

    def focusOutEvent(self, evt):
        print "focus lost"

    def setupEditor(self):
        self.editor = aqt.editor.Editor(self.mw, self.form.fieldsArea)

    def setupChooser(self):
        self.modelChooser = aqt.modelchooser.ModelChooser(
            self.mw, self.form.modelArea)

    def helpRequested(self):
        aqt.openHelp("AddItems")

    def setupButtons(self):
        # add
        self.addButton = QPushButton(_("Add"))
        self.form.buttonBox.addButton(self.addButton,
                                        QDialogButtonBox.ActionRole)
        self.addButton.setShortcut(_("Ctrl+Return"))
        if isMac:
            self.addButton.setToolTip(_("Add (shortcut: command+return)"))
        else:
            self.addButton.setToolTip(_("Add (shortcut: ctrl+return)"))
        s = QShortcut(QKeySequence(_("Ctrl+Enter")), self)
        s.connect(s, SIGNAL("activated()"), self.addButton, SLOT("click()"))
        self.connect(self.addButton, SIGNAL("clicked()"), self.addCards)
        # close
        self.closeButton = QPushButton(_("Close"))
        self.closeButton.setAutoDefault(False)
        self.form.buttonBox.addButton(self.closeButton,
                                        QDialogButtonBox.RejectRole)
        # help
        self.helpButton = QPushButton(_("Help"))
        self.helpButton.setAutoDefault(False)
        self.form.buttonBox.addButton(self.helpButton,
                                        QDialogButtonBox.HelpRole)
        self.connect(self.helpButton, SIGNAL("clicked()"), self.helpRequested)
        # history
        b = self.form.buttonBox.addButton(
            _("History")+ u'▼', QDialogButtonBox.ActionRole)
        self.connect(b, SIGNAL("clicked()"), self.onHistory)
        b.setEnabled(False)
        self.historyButton = b

    # FIXME: need to make sure to clean up fact on exit
    def setupNewFact(self, set=True):
        f = self.mw.deck.newFact()
        if self.editor.fact:
            # keep tags?
            f.tags = self.editor.fact.tags
        if set:
            self.editor.setFact(f)
        return f

    def onReset(self, model=None):
        oldFact = self.editor.fact
        fact = self.setupNewFact(set=False)
        # copy fields from old fact
        if oldFact:
            self.removeTempFact(oldFact)
            for n in range(len(fact.fields)):
                try:
                    fact.fields[n] = oldFact.fields[n]
                except IndexError:
                    break
        self.editor.setFact(fact)

    def removeTempFact(self, fact):
        if not fact or not fact.id:
            return
        # we don't have to worry about cards; just the fact
        self.mw.deck._delFacts([fact.id])

    def addHistory(self, fact):
        txt = stripHTMLMedia(",".join(fact.fields))[:30]
        self.history.append((fact.id, txt))
        self.history = self.history[-15:]
        self.historyButton.setEnabled(True)

    def onHistory(self):
        m = QMenu(self)
        for fid, txt in self.history:
            a = m.addAction(_("Edit %s" % txt))
            a.connect(a, SIGNAL("activated()"),
                      lambda fid=fid: self.editHistory(fid))
        m.exec_(self.historyButton.mapToGlobal(QPoint(0,0)))

    def editHistory(self, fid):
        browser = aqt.dialogs.open("Browser", self.mw)
        browser.form.searchEdit.setText("fid:%d" % fid)
        browser.onSearch()

    def addFact(self, fact):
        if any(fact.problems()):
            showWarning(_(
                "Some fields are missing or not unique."),
                     help="AddItems#AddError")
            return
        cards = self.mw.deck.addFact(fact)
        if not cards:
            showWarning(_("""\
The input you have provided would make an empty
question or answer on all cards."""), help="AddItems")
            return
        self.addHistory(fact)
        # FIXME: return to overview on add?
        return fact

    def addCards(self):
        self.editor.saveNow()
        fact = self.editor.fact
        fact = self.addFact(fact)
        if not fact:
            return
        # stop anything playing
        clearAudioQueue()
        self.setupNewFact()
        self.mw.deck.autosave()

    def keyPressEvent(self, evt):
        "Show answer on RET or register answer."
        if (evt.key() in (Qt.Key_Enter, Qt.Key_Return)
            and self.editor.tags.hasFocus()):
            evt.accept()
            return
        return QDialog.keyPressEvent(self, evt)

    def reject(self):
        if not self.canClose():
            return
        removeHook('reset', self.onReset)
        removeHook('currentModelChanged', self.onReset)
        clearAudioQueue()
        self.removeTempFact(self.editor.fact)
        self.editor.setFact(None)
        self.modelChooser.cleanup()
        self.mw.maybeReset()
        saveGeom(self, "add")
        aqt.dialogs.close("AddCards")
        QDialog.reject(self)

    def canClose(self):
        if (self.forceClose or self.editor.fieldsAreBlank() or
            askUser(_("Close and lose current input?"))):
            return True
        return False