import json
import random
import datetime
from django.shortcuts import redirect
from django.contrib import messages
from django.utils import timezone
from django_ledger.models.entity import UnitOfMeasureModel
from django_ledger.models.journal_entry import JournalEntryModel
from django_ledger.models.ledger import LedgerModel
from django_ledger.models.transactions import TransactionModel
import requests
from inventory import models
from django.conf import settings
from django.core.mail import send_mail
from django.utils.translation import gettext_lazy as _
from inventory.utilities.financials import get_financial_value
from django_ledger.models.items import ItemModel
from django_ledger.models import InvoiceModel, EstimateModel,BillModel
from decimal import Decimal


def get_jwt_token():
    url = "https://carapi.app/api/auth/login"
    headers = {
        "accept": "text/plain",
        "Content-Type": "application/json",
    }
    data = {
        "api_token": "f5204a00-6f31-4de2-96d8-ed998e0d230c",
        "api_secret": "8c11320781a5b8f4f327b6937e6f8241",
    }
    try:
        response = requests.post(url, headers=headers, json=data)
        response.raise_for_status()
        return response.text
    except requests.exceptions.RequestException as e:
        print(f"Error obtaining JWT token: {e}")
        return None


def localize_some_words():
    success = _("success")
    error = _("error")
    forget = _("Forgot Password?")

    return None


def get_calculations(quotation):
    context = {}
    qc_len = quotation.quotation_cars.count()
    cars = [x.car for x in quotation.quotation_cars.all()]
    finances = models.CarFinance.objects.filter(car__in=cars)

    services = ItemModel.objects.filter(additional_finances__in=finances).all()
    data = [
        {
            "name": x.name,
            "price": x.default_amount,
            "total_price": x.default_amount * qc_len,
            "vated": float(x.default_amount) * 0.15 * float(qc_len),
            "total_price_vat": float(x.default_amount)
            + (float(x.default_amount) * 0.15 * float(qc_len)),
        }
        for x in services
    ]
    context["services"] = data
    context["total_cost"] = 0
    context["total_vat"] = 0
    context["total_cost_vat"] = 0
    for k in context["services"]:
        context["total_cost"] += k["total_price"]
        context["total_vat"] += k["vated"]
    context["total_cost_vat"] = float(context["total_cost"]) + float(
        context["total_vat"]
    )
    return context


def send_email(from_, to_, subject, message):
    subject = subject
    message = message
    from_email = from_
    recipient_list = [to_]
    send_mail(subject, message, from_email, recipient_list)


def get_user_type(request):
    dealer = ""
    if hasattr(request.user, "dealer"):
        dealer = request.user.dealer
    elif hasattr(request.user, "staff"):
        dealer = request.user.staff.dealer
    return dealer


def get_dealer_from_instance(instance):
    if instance.dealer.staff:
        return instance.dealer
    else:
        return instance.dealer


def reserve_car(car, request):
    try:
        reserved_until = timezone.now() + timezone.timedelta(hours=24)
        models.CarReservation.objects.create(
            car=car, reserved_by=request.user, reserved_until=reserved_until
        )
        car.status = models.CarStatusChoices.RESERVED
        car.save()
        messages.success(request, _("Car reserved successfully."))
    except Exception as e:
        messages.error(request, f"Error reserving car: {e}")

    return redirect("car_detail", pk=car.pk)


def calculate_vat_amount(amount):
    vat = models.VatRate.objects.filter(is_active=True).first()
    if vat:
        return ((amount * Decimal(vat.rate)).quantize(Decimal("0.01")), vat.rate)
    return amount


def get_financial_values(model):
    vat = models.VatRate.objects.filter(is_active=True).first()

    if not model.get_itemtxs_data()[0].exists():
        return {
            "vat_amount": 0,
            "total": 0,
            "grand_total": 0,
            "discount_amount": 0,
            "vat": 0,
            "car_and_item_info": [],
            "additional_services": [],
        }

    data = model.get_itemtxs_data()[0].all()

    if isinstance(model, InvoiceModel):
        data = model.ce_model.get_itemtxs_data()[0].all()

    car_and_item_info = [
        {
            "car": models.Car.objects.get(vin=x.item_model.name),
            "total": models.Car.objects.get(
                vin=x.item_model.name
            ).finances.selling_price
            * Decimal(x.ce_quantity),
            "itemmodel": x,
        }
        for x in data
    ]
    total = sum(
        Decimal(models.Car.objects.get(vin=x.item_model.name).finances.total)
        * Decimal(x.ce_quantity)
        for x in data
    )
    discount_amount = sum(
        models.CarFinance.objects.get(car__vin=i.item_model.name).discount_amount
        for i in data
    )

    additional_services = []

    for i in data:
        cf = models.CarFinance.objects.get(car__vin=i.item_model.name)
        if cf.additional_services.exists():
            additional_services.extend(
                [
                    {"name": x.name, "price": x.price}
                    for x in cf.additional_services.all()
                ]
            )

    grand_total = Decimal(total) - Decimal(discount_amount)
    vat_amount = round(Decimal(grand_total) * Decimal(vat.rate), 2)
    return {
        "car_and_item_info": car_and_item_info,
        "total": total,
        "discount_amount": discount_amount,
        "additional_services": additional_services,
        "grand_total": grand_total + vat_amount,
        "vat_amount": vat_amount,
        "vat": vat.rate,
    }


def set_invoice_payment(dealer, entity, invoice, amount, payment_method):
    vat_amount = 0
    total_amount = 0

    if invoice.terms == "on_receipt":
        for x in invoice.get_itemtxs_data()[0].all():
            vat_amount += models.Car.objects.get(
                vin=x.item_model.name
            ).finances.vat_amount * Decimal(x.quantity)
            total_amount += Decimal(x.unit_cost) * Decimal(x.quantity)

    grand_total = total_amount - Decimal(vat_amount)

    ledger = LedgerModel.objects.filter(
        name__icontains=str(invoice.pk), entity=entity
    ).first()
    journal = JournalEntryModel.objects.create(
        posted=False,
        description=f"Payment for Invoice {invoice.invoice_number}",
        ledger=ledger,
        locked=False,
        origin="Payment",
    )
    credit_account = entity.get_default_coa_accounts().get(name="Sales Revenue")
    debit_account = None
    if payment_method == "cash":
        debit_account = entity.get_default_coa_accounts().get(name="Cash", active=True)
    elif payment_method == "credit":
        debit_account = entity.get_default_coa_accounts().get(
            name="Accounts Receivable", active=True
        )
    else:
        debit_account = entity.get_default_coa_accounts().get(
            name="Cash in Bank", active=True
        )

    vat_payable_account = entity.get_default_coa_accounts().get(
        name="VAT Payable", active=True
    )
    TransactionModel.objects.create(
        journal_entry=journal,
        account=debit_account,  # Debit Cash
        amount=amount,  # Payment amount
        tx_type="debit",
        description="Payment Received",
    )

    TransactionModel.objects.create(
        journal_entry=journal,
        account=credit_account,  # Credit Accounts Receivable
        amount=grand_total,  # Payment amount
        tx_type="credit",
        description="Payment Received",
    )

    if vat_amount > 0:
        TransactionModel.objects.create(
            journal_entry=journal,
            account=vat_payable_account,  # Credit VAT Payable
            amount=vat_amount,
            tx_type="credit",
            description="VAT Payable on Invoice",
        )

    invoice.make_payment(amount)
    invoice.save()


def set_bill_payment(dealer, entity, bill, amount, payment_method):
    total_amount = 0
    for x in bill.get_itemtxs_data()[0].all():
        total_amount += Decimal(x.unit_cost) * Decimal(x.quantity)

    journal = JournalEntryModel.objects.create(
        posted=False,
        description=f"Payment for bill {bill.bill_number}",
        ledger=bill.ledger,
        locked=False,
        origin="Payment",
    )

    cash_account = entity.get_default_coa_accounts().get(name="Cash", active=True)

    account_payable = entity.get_default_coa_accounts().get(
        name="Accounts Payable", active=True
    )


    TransactionModel.objects.create(
        journal_entry=journal,
        account=cash_account,  # Debit Cash
        amount=amount,  # Payment amount
        tx_type="debit",
        description="Payment Received",
    )

    TransactionModel.objects.create(
        journal_entry=journal,
        account=account_payable,  # Credit Accounts Receivable
        amount=amount,  # Payment amount
        tx_type="credit",
        description="Payment Received",
    )

    bill.make_payment(amount)
    bill.save()


def transfer_to_dealer(request,cars, to_dealer, remarks=None):
    dealer = get_user_type(request)
    
    if not cars:
        raise ValueError("No cars selected for transfer.")

    from_dealer = cars[0].dealer  # Assume all cars are from the same dealer

    # Validate that all cars are from the same dealer
    for car in cars:
        if car.dealer != from_dealer:
            raise ValueError("All cars must be from the same dealer.")

    if from_dealer == to_dealer:
        raise ValueError("Cannot transfer cars to the same dealer.")

    # Log the transfer
    transfer_log = models.CarTransferLog.objects.create(
        from_dealer=from_dealer,
        to_dealer=to_dealer,
        remarks=remarks,
    )
    transfer_log.cars.set(cars)  # Associate the cars with the transfer log

    # Update the dealer for all cars
    for car in cars:
        car.dealer = to_dealer
        car.save()
    
def transfer_car(car,transfer):
    from_dealer = transfer.from_dealer
    to_dealer = transfer.to_dealer
    # add transfer.to_dealer as customer in transfer.from_dealer entity
    instance = models.Customer.objects.filter(
    dealer=from_dealer,
    email=to_dealer.user.email,    
    ).first()
    if not instance:
        instance = models.Customer.objects.create(
            dealer=from_dealer,
            title=models.Title.MR,
            email=to_dealer.user.email,
            first_name=to_dealer.user.first_name,            
            last_name=to_dealer.user.last_name,
            phone_number=f"05685412{random.randint(10, 99)}",
            address=to_dealer.address,
            national_id=f"{random.randint(100, 9999)}",
            dob="1990-01-01",
        )        
    
    # create invoice from transfer.from_dealer to transfer.to_dealer   
    name = f"{instance.first_name} {instance.middle_name} {instance.last_name}"
    customer = from_dealer.entity.get_customers().filter(customer_name=name).first()

    invoice = from_dealer.entity.create_invoice(
        customer_model=customer,
        terms=InvoiceModel.TERMS_NET_30,
        cash_account=from_dealer.entity.get_default_coa_accounts().get(name="Cash", active=True),
        prepaid_account=from_dealer.entity.get_default_coa_accounts().get(name="Accounts Receivable", active=True),
        coa_model=from_dealer.entity.get_default_coa(),
    )
    
    ledger = from_dealer.entity.create_ledger(name=str(invoice.pk))
    invoice.ledgar = ledger
    ledger.invoicemodel = invoice
    ledger.save()
    invoice.save()
    item = from_dealer.entity.get_items_products().filter(name=car.vin).first()
    if not item:
        return
    
    invoice_itemtxs = {
        item.item_number: {
            "unit_cost": car.finances.cost_price,                
            "quantity": transfer.quantity,
            "total_amount": transfer.total_price,
        }
    }

    invoice_itemtxs = invoice.migrate_itemtxs(
        itemtxs=invoice_itemtxs,
        commit=True,
        operation=InvoiceModel.ITEMIZE_APPEND,
    )
    
    invoice.mark_as_review()
    invoice.mark_as_approved(from_dealer.entity.slug, from_dealer.entity.admin)
    invoice.mark_as_paid(from_dealer.entity.slug, from_dealer.entity.admin)
    invoice.save()

    #create car item product in to_dealer entity
    uom = to_dealer.entity.get_uom_all().filter(name=item.uom.name).first()
    
    product = to_dealer.entity.create_item_product(
    name=item.name,
    uom_model=uom,
    item_type=item.item_type,
    coa_model=to_dealer.entity.get_default_coa(),
    )

    car_dict = vars(car).copy()
    del car_dict["_state"]
    for key, value in car_dict.items():
        if isinstance(value, datetime.datetime):
            car_dict[key] = value.strftime('%Y-%m-%d %H:%M:%S')
    product.additional_info = json.dumps({"car_info": car_dict})
    product.save()
    
    #add the sender as vendor and create a bill for it
    vendor_instance, created = models.Vendor.objects.get_or_create(
        dealer=to_dealer,
        crn=from_dealer.crn,
        vrn=from_dealer.vrn,
        name=from_dealer.name,
        email=from_dealer.user.email,
        arabic_name=from_dealer.arabic_name,
        address=from_dealer.address,
        phone_number=from_dealer.phone_number,
        contact_person='',
    )
        
    #transfer the car to to_dealer and create items record        
    
    vendor = to_dealer.entity.get_vendors().filter(vendor_name=vendor_instance.name).first()
    
    bill = to_dealer.entity.create_bill(
        vendor_model=vendor,
        terms=BillModel.TERMS_NET_30,
        cash_account=to_dealer.entity.get_default_coa_accounts().get(name="Cash", active=True),
        prepaid_account=to_dealer.entity.get_default_coa_accounts().get(name="Prepaid Expenses", active=True),
        coa_model=to_dealer.entity.get_default_coa(),
    )
    
    bill_itemtxs = {
        item.item_number: {
            "unit_cost": car.finances.cost_price,                
            "quantity": transfer.quantity,
            "total_amount": transfer.total_price,
        }
        }
    
    bill_itemtxs = bill.migrate_itemtxs(itemtxs=bill_itemtxs,
                                          commit=True,
                                          operation=BillModel.ITEMIZE_REPLACE)
    
    
    car.dealer = to_dealer
    car.vendor = vendor_instance
    car.receiving_date = datetime.datetime.now()
    car.finances.additional_services.clear()
    if hasattr(car, "custom_cards"):
        car.custom_cards.delete()
    # car.finances.cost_price = 0
    car.finances.selling_price = 0
    car.finances.discount_amount = 0
    car.finances.save()
    car.location.owner = to_dealer
    car.location.showroom = to_dealer
    car.location.description = ""
    car.location.save()
    
    # car.reservations.all().delete()
    car.status = models.CarStatusChoices.AVAILABLE
    transfer.status = models.CarTransferStatusChoices.success
    transfer.active = False
    transfer.save()
    car.save()
    
    return True
    #pay the pill
    # set_bill_payment(to_dealer,to_dealer.entity,bill,transfer.total_price,"credit")