# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2008 - 2014 by Wilbert Berendsen
#
# 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 St, Fifth Floor, Boston, MA  02110-1301  USA
# See http://www.gnu.org/licenses/ for more information.

"""
The log dockwindow.
"""


from PyQt5.QtCore import QSettings, Qt
from PyQt5.QtGui import QKeySequence
from PyQt5.QtWidgets import QAction

import actioncollection
import actioncollectionmanager
import app
import panel


class LogTool(panel.Panel):
    """A dockwidget showing the log of running Jobs."""
    def __init__(self, mainwindow):
        super(LogTool, self).__init__(mainwindow)
        self.hide()
        self.toggleViewAction().setShortcut(QKeySequence("Meta+Alt+L"))
        ac = self.actionCollection = Actions()
        ac.log_next_error.triggered.connect(self.slotNextError)
        ac.log_previous_error.triggered.connect(self.slotPreviousError)
        actioncollectionmanager.manager(mainwindow).addActionCollection(ac)
        mainwindow.addDockWidget(Qt.BottomDockWidgetArea, self)
        app.jobStarted.connect(self.slotJobStarted)
        app.jobFinished.connect(self.slotJobFinished)

    def translateUI(self):
        self.setWindowTitle(_("LilyPond Log"))
        self.toggleViewAction().setText(_("LilyPond &Log"))

    def createWidget(self):
        from . import logwidget
        return logwidget.LogWidget(self)

    def slotJobStarted(self, doc, j):
        """Called whenever job starts, decides whether to follow it and show the log."""
        import job
        jattrs = job.attributes.get(j)
        if doc == self.mainwindow().currentDocument() or self.mainwindow() == jattrs.mainwindow:
            self.widget().switchDocument(doc)
            if not jattrs.hidden and QSettings().value("log/show_on_start", True, bool):
                self.show()

    def slotJobFinished(self, document, j, success):
        import job
        if (not success and not j.is_aborted()
                and not job.attributes.get(j).hidden
                and document == self.mainwindow().currentDocument()):
            self.show()

    def slotNextError(self):
        """Jumps to the position pointed to by the next error message."""
        self.activate()
        self.widget().gotoError(1)

    def slotPreviousError(self):
        """Jumps to the position pointed to by the next error message."""
        self.activate()
        self.widget().gotoError(-1)


class Actions(actioncollection.ActionCollection):
    name = "logtool"
    def createActions(self, parent=None):
        self.log_next_error = QAction(parent)
        self.log_previous_error = QAction(parent)

        self.log_next_error.setShortcut(QKeySequence("Ctrl+E"))
        self.log_previous_error.setShortcut(QKeySequence("Ctrl+Shift+E"))

    def translateUI(self):
        self.log_next_error.setText(_("Next Error Message"))
        self.log_previous_error.setText(_("Previous Error Message"))


# log errors by initializing Errors instance
@app.jobStarted.connect
def _log_errors(document):
    from . import errors
    errors.errors(document)
