import requests
from decimal import getcontext, Decimal, ROUND_HALF_UP
from datetime import datetime
from trytond.model import fields
from trytond.model import ModelSQL, ModelView
from trytond.pool import Pool, PoolMeta
from trytond.transaction import Transaction
import logging
from sql import Table

logger = logging.getLogger(__name__)

class Cron(metaclass=PoolMeta):
    __name__ = 'ir.cron'

    @classmethod
    def __setup__(cls):
        super().__setup__()
        cls.method.selection.append(
            ('automation.cron|update_shipment', "Update Shipment from freight booking info")
        )

class AutomationCron(ModelSQL, ModelView):
    "Automation Cron"
    __name__ = 'automation.cron'

    frequency = fields.Selection([
        ('daily', "Daily"),
        ('weekly', "Weekly"),
        ('monthly', "Monthly"),
    ], "Frequency", required=True,
    help="How frequently rates must be updated.")

    last_update = fields.Date("Last Update", required=True)

    @classmethod
    def run(cls, crons):
        cls.update_shipment()

    @classmethod
    def update_shipment(cls):
        PoolObj = Pool()
        ShipmentIn = PoolObj.get('stock.shipment.in')
        Party = PoolObj.get('party.party')
        Vessel = PoolObj.get('trade.vessel')
        Location = PoolObj.get('stock.location')

        # Table externe
        t = Table('freight_booking_info')
        cursor = Transaction().connection.cursor()
        cursor.execute(*t.select(
            t.ShippingInstructionNumber,
            t.ShippingInstructionDate,
            t.ShippingInstructionQuantity,
            t.ShippingInstructionQuantityUnit,
            t.NumberOfContainers,
            t.ContainerType,
            t.Loading,
            t.Destination,
            t.BookingAgent,
            t.Carrier,
            t.Vessel,
            t.BL_Number,
            t.ETD_Date,
            t.BL_Date,
            t.ExpectedController,
            t.Comments,
            t.FintradeBookingKey,
        ))

        # Préparer les listes pour la sauvegarde et les données du shipment
        parties_to_save = []
        vessels_to_save = []
        locations_to_save = []
        shipments_data = []  # <-- nouvelle liste

        parties_cache = {}
        vessels_cache = {}
        locations_cache = {}

        rows = cursor.fetchall()
        for row in rows:
            (
                si_number, si_date, si_quantity, si_unit,
                container_number, container_type,
                loading_name, destination_name,
                agent_name, carrier_name,
                vessel_name, bl_number,
                etd_date, bl_date, controller,
                comments, fintrade_booking_key
            ) = row

            logger.info("ROW_FROM_CRON: %s", row)

            # ----- Fonctions pour créer ou récupérer les objets -----
            def get_or_create_party(name):
                name_upper = name.upper()
                if name_upper in parties_cache:
                    return parties_cache[name_upper]
                existing = Party.search([('name', '=', name_upper)], limit=1)
                if existing:
                    parties_cache[name_upper] = existing[0]
                    return existing[0]
                if name:
                    new_p = Party()
                    new_p.name = name_upper
                    parties_cache[name_upper] = new_p
                    parties_to_save.append(new_p)
                    return new_p

            def get_or_create_vessel(name, imo=None):
                name_upper = name.upper()
                if name_upper in vessels_cache:
                    return vessels_cache[name_upper]
                existing = Vessel.search([('vessel_name', '=', name_upper)], limit=1)
                if existing:
                    vessels_cache[name_upper] = existing[0]
                    return existing[0]
                if name:
                    new_v = Vessel()
                    new_v.vessel_name = name_upper
                    new_v.vessel_imo = imo
                    vessels_cache[name_upper] = new_v
                    vessels_to_save.append(new_v)
                    return new_v

            def get_or_create_location(name, type_):
                key = f"{name.upper()}_{type_}"
                if key in locations_cache:
                    return locations_cache[key]
                existing = Location.search([('name', '=', name.upper()), ('type', '=', type_)], limit=1)
                if existing:
                    locations_cache[key] = existing[0]
                    return existing[0]
                if name:
                    new_loc = Location()
                    new_loc.name = name.upper()
                    new_loc.type = type_
                    locations_cache[key] = new_loc
                    locations_to_save.append(new_loc)
                    return new_loc

            # ----- Récupération ou création des objets -----
            carrier = get_or_create_party(carrier_name)
            agent = get_or_create_party(agent_name)
            vessel = get_or_create_vessel(vessel_name)
            loc_from = get_or_create_location(loading_name, 'supplier')
            loc_to = get_or_create_location(destination_name, 'customer')

            # Stocker les données pour la deuxième étape
            shipments_data.append({
                'si_number': si_number,
                'bl_number': bl_number,
                'bl_date': bl_date,
                'etd_date': etd_date,
                'carrier': carrier,
                'agent': agent,
                'vessel': vessel,
                'from_location': loc_from,
                'to_location': loc_to,
            })

        # ----- Étape 1 : sauvegarde des objets de référence -----
        if parties_to_save:
            Party.save(parties_to_save)
        if vessels_to_save:
            Vessel.save(vessels_to_save)
        if locations_to_save:
            Location.save(locations_to_save)

        # Commit pour garantir que tous les IDs sont corrects
        Transaction().commit()

        # ----- Étape 2 : création des shipments -----
        for data in shipments_data:
            si_number = data['si_number']
            shipment = ShipmentIn.search([('reference', '=', si_number)], limit=1)
            if shipment:
                sh = shipment[0]
            else:
                sh = ShipmentIn()
                sh.reference = si_number
                sh.from_location = data['from_location']
                sh.to_location = data['to_location']
                sh.carrier = data['carrier']
                sh.supplier = data['agent']
                sh.vessel = data['vessel']
                sh.cargo_mode = 'bulk'
                sh.bl_number = data['bl_number']
                sh.bl_date = data['bl_date']
                sh.etd = data['etd_date']
                ShipmentIn.save([sh])
                logger.info("SHIPMENT_CREATED: %s", sh)