# -*- coding: utf-8; -*-
################################################################################
#
#  Rattail -- Retail Software Framework
#  Copyright © 2010-2023 Lance Edgar
#
#  This file is part of Rattail.
#
#  Rattail 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 3 of the License, or (at your option) any later
#  version.
#
#  Rattail 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
#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
#
################################################################################
"""
Handler for CORE equity import batches
"""

from corepos.db.office_trans import model as coretrans, Session as CoreTransSession

from rattail.batch import BatchHandler
from rattail_corepos.db.model import CoreEquityImportBatch


class CoreEquityImportBatchHandler(BatchHandler):
    """
    Handler for CORE member batches.
    """
    batch_model_class = CoreEquityImportBatch

    def refresh_row(self, row):
        session = self.app.get_session(row)
        model = self.model

        row.status_code = None
        row.status_text = None

        if not row.card_number:
            row.status_code = row.STATUS_MISSING_VALUES
            row.status_text = "card_number"
            return

        if not row.payment_amount:
            row.status_code = row.STATUS_MISSING_VALUES
            row.status_text = "payment_amount"
            return

        if not row.department_number:
            row.status_code = row.STATUS_MISSING_VALUES
            row.status_text = "department_number"
            return

        if not row.timestamp:
            row.status_code = row.STATUS_MISSING_VALUES
            row.status_text = "timestamp"
            return

        payment = row.payment
        if payment and payment.corepos_transaction_number:
            row.status_code = row.STATUS_ALREADY_IN_CORE
            return

        member = payment.member if payment else None
        row.member = member
        if not member:
            row.status_code = row.STATUS_MEMBER_NOT_FOUND
            return

        memtype = member.membership_type
        row.member_type_id = memtype.number if memtype else None

        if member.person:
            person = member.person
            row.first_name = person.first_name
            row.last_name = person.last_name

        membership = self.app.get_membership_handler()
        row.rattail_equity_total = membership.get_equity_total(member)

        row.status_code = row.STATUS_OK

    def describe_execution(self, batch, **kwargs):
        return "New payment transactions will be added directly to CORE-POS."

    def get_effective_rows(self, batch):
        return [row for row in batch.active_rows()
                if row.status_code not in (row.STATUS_MISSING_VALUES,
                                           row.STATUS_MEMBER_NOT_FOUND,
                                           row.STATUS_ALREADY_IN_CORE)]

    def execute(self, batch, progress=None, **kwargs):
        if self.config.production():
            raise NotImplementedError("TODO: not yet implemented for production")

        rows = self.get_effective_rows(batch)
        self.export_payments_to_corepos(rows, progress=progress)
        return True

    def export_payments_to_corepos(self, rows, progress=None):
        coretrans_session = CoreTransSession()

        def export(row, i):

            # will insert 2 records in `core_trans.dtransactions` ...

            # they will have this data in common
            host_data = {
                'store_id': 1,   # TODO: all "normal" txns have store_id=1
                'register_number': 1, # TODO: what should this be? surely can't be empty
                'transaction_number': 42, # TODO: how should we generate this? unique per register_no?
                'date_time': self.app.localtime(row.timestamp, from_utc=True, tzinfo=False),
                'card_number': row.card_number,
                'total': row.payment_amount,
            }

            # first a record to ring up the equity item
            detail = coretrans.TransactionDetail(**host_data)
            detail.upc = 'TEST_ITEM' # TODO: what should this say?
            detail.description = 'TEST_EQUITY_ITEM' # TODO: what should this say?
            detail.department_number = row.department_number
            detail.quantity = 1 # TODO: should this ever be anything else?
            detail.unit_price = row.payment_amount
            coretrans_session.add(detail)

            # then a record to accept tender payment
            detail = coretrans.TransactionDetail(**host_data)
            detail.upc = 'TEST_TENDER' # TODO: what should this say?
            detail.description = 'TEST_EQUITY_TENDER' # TODO: what should this say?
            coretrans_session.add(detail)

            # update payment in Rattail to indicate pending status in CORE
            payment = row.payment
            if payment:
                payment.corepos_card_number = row.card_number
                payment.corepos_department_number = row.department_number
                payment.corepos_transaction_number = 'pending'

        self.progress_loop(export, rows, progress,
                           message="Exporting payments to CORE-POS")

        coretrans_session.commit()
        coretrans_session.close()