#!/usr/bin/env python
__copyright__ = '2008, Kovid Goyal kovid@kovidgoyal.net'
__docformat__ = 'restructuredtext en'
__license__   = 'GPL v3'


from PyQt4.Qt import QDialog, QGridLayout, QLabel, QDialogButtonBox,  \
            QApplication, QSpinBox, QToolButton, QIcon
from calibre.ebooks.metadata import authors_to_string, string_to_authors
from calibre.utils.icu import sort_key
from calibre.gui2.complete import MultiCompleteComboBox
from calibre.utils.config import tweaks

class AddEmptyBookDialog(QDialog):

    def __init__(self, parent, db, author):
        QDialog.__init__(self, parent)
        self.db = db

        self.setWindowTitle(_('How many empty books?'))

        self._layout = QGridLayout(self)
        self.setLayout(self._layout)

        self.qty_label = QLabel(_('How many empty books should be added?'))
        self._layout.addWidget(self.qty_label, 0, 0, 1, 2)

        self.qty_spinbox = QSpinBox(self)
        self.qty_spinbox.setRange(1, 10000)
        self.qty_spinbox.setValue(1)
        self._layout.addWidget(self.qty_spinbox, 1, 0, 1, 2)

        self.author_label = QLabel(_('Set the author of the new books to:'))
        self._layout.addWidget(self.author_label, 2, 0, 1, 2)

        self.authors_combo = MultiCompleteComboBox(self)
        self.authors_combo.setSizeAdjustPolicy(
                self.authors_combo.AdjustToMinimumContentsLengthWithIcon)
        self.authors_combo.setEditable(True)
        self._layout.addWidget(self.authors_combo, 3, 0, 1, 1)
        self.initialize_authors(db, author)

        self.clear_button = QToolButton(self)
        self.clear_button.setIcon(QIcon(I('trash.png')))
        self.clear_button.setToolTip(_('Reset author to Unknown'))
        self.clear_button.clicked.connect(self.reset_author)
        self._layout.addWidget(self.clear_button, 3, 1, 1, 1)

        button_box = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
        button_box.accepted.connect(self.accept)
        button_box.rejected.connect(self.reject)
        self._layout.addWidget(button_box)
        self.resize(self.sizeHint())

    def reset_author(self, *args):
        self.authors_combo.setEditText(_('Unknown'))

    def initialize_authors(self, db, author):
        all_authors = db.all_authors()
        all_authors.sort(key=lambda x : sort_key(x[1]))
        for i in all_authors:
            id, name = i
            name = [name.strip().replace('|', ',') for n in name.split(',')]
            self.authors_combo.addItem(authors_to_string(name))

        au = author
        if not au:
            au = _('Unknown')
        self.authors_combo.setEditText(au.replace('|', ','))

        self.authors_combo.set_separator('&')
        self.authors_combo.set_space_before_sep(True)
        self.authors_combo.set_add_separator(tweaks['authors_completer_append_separator'])
        self.authors_combo.update_items_cache(db.all_author_names())

    @property
    def qty_to_add(self):
        return self.qty_spinbox.value()

    @property
    def selected_authors(self):
        return string_to_authors(unicode(self.authors_combo.text()))

if __name__ == '__main__':
    app = QApplication([])
    d = AddEmptyBookDialog()
    d.exec_()