#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2015 Thomas Voegtlin
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

from electrum.i18n import _
from electrum.util import format_time

from .util import *


class InvoiceList(MyTreeView):
    filter_columns = [0, 1, 2, 3]  # Date, Requestor, Description, Amount

    def __init__(self, parent):
        super().__init__(parent, self.create_menu, 2)
        self.setSortingEnabled(True)
        self.setColumnWidth(1, 200)
        self.setModel(QStandardItemModel(self))
        self.update()

    def update(self):
        inv_list = self.parent.invoices.unpaid_invoices()
        self.model().clear()
        self.update_headers([_('Expires'), _('Requestor'), _('Description'), _('Amount'), _('Status')])
        self.header().setSectionResizeMode(1, QHeaderView.Interactive)
        for pr in inv_list:
            key = pr.get_id()
            status = self.parent.invoices.get_status(key)
            requestor = pr.get_requestor()
            exp = pr.get_expiration_date()
            date_str = format_time(exp) if exp else _('Never')
            labels = [date_str, requestor, pr.memo, self.parent.format_amount(pr.get_amount(), whitespaces=True), pr_tooltips.get(status,'')]
            item = [QStandardItem(e) for e in labels]
            item[4].setIcon(self.icon_cache.get(pr_icons.get(status)))
            item[0].setData(Qt.UserRole, key)
            item[1].setFont(QFont(MONOSPACE_FONT))
            item[3].setFont(QFont(MONOSPACE_FONT))
            self.addTopLevelItem(item)
        self.selectionModel().select(self.model().index(0,0), QItemSelectionModel.SelectCurrent)
        if self.parent.isVisible():
            b = len(inv_list) > 0
            self.setVisible(b)
            self.parent.invoices_label.setVisible(b)

    def import_invoices(self):
        import_meta_gui(self.parent, _('invoices'), self.parent.invoices.import_file, self.update)

    def export_invoices(self):
        export_meta_gui(self.parent, _('invoices'), self.parent.invoices.export_file)

    def create_menu(self, position):
        menu = QMenu()
        item = self.itemAt(position)
        if not item:
            return
        key = item.data(0, Qt.UserRole)
        column = self.currentColumn()
        column_title = self.headerItem().text(column)
        column_data = item.text(column)
        pr = self.parent.invoices.get(key)
        status = self.parent.invoices.get_status(key)
        if column_data:
            menu.addAction(_("Copy {}").format(column_title), lambda: self.parent.app.clipboard().setText(column_data))
        menu.addAction(_("Details"), lambda: self.parent.show_invoice(key))
        if status == PR_UNPAID:
            menu.addAction(_("Pay Now"), lambda: self.parent.do_pay_invoice(key))
        menu.addAction(_("Delete"), lambda: self.parent.delete_invoice(key))
        menu.exec_(self.viewport().mapToGlobal(position))