from django.shortcuts import render, get_object_or_404
from django.template import RequestContext
from django.http import HttpResponse

from django.template.loader import render_to_string

from weasyprint import HTML, CSS
# from weasyprint.fonts import FontConfiguration

# from PIL import Image
import os
import pendulum
from django.conf import settings

from datetime import date

from comptabilite.facture_config import loadFactureConfig

from .models import (
    Client,
    Contract,
    Prestation,
)


def contract_listing(request, client_id=None):
    """
    Renvoie la liste de tous les contrats.
    """

    if client_id:
        client = get_object_or_404(Client, pk=client_id)
        contract_list = client.contracts.all()
    else:
        client = None
        contract_list = Contract.objects.all()

    context = {"contract_list": contract_list, "client": client}
    return render(request, "contract/listing.html", context)


def contract_detail(request, contract_id):
    """
    Renvoie toutes les informations relatives à un contrat, en ce y compris les prestations
    relatives à celui-ci.
    """

    contract = Contract.objects.get(pk=contract_id)
    total_without_discount_htva = contract.get_contract_sum("total_amount_htva")
    total_without_discount_tvac = contract.get_contract_sum("total_amount_tvac")

    total_with_discount_htva = total_without_discount_htva
    total_with_discount_tvac = total_without_discount_tvac
    for discount in contract.discounts.all():
        total_with_discount_htva -= discount.amount_htva()
        total_with_discount_tvac -= discount.amount_tvac()

    context = {
        "contract": contract,
        "prestations_list": contract.get_prestation.all(),
        "total_without_discount_htva": total_without_discount_htva,
        "total_without_discount_tvac": total_without_discount_tvac,
        "total_with_discount_htva": total_with_discount_htva,
        "total_with_discount_tvac": total_with_discount_tvac,
    }
    return render(request, "contract/detail.html", context)


def client_listing(request):
    """
    Renvoie la liste de tous les clients.
    """
    client_list = Client.objects.all()
    context = {"client_list": client_list}
    return render(request, "client/listing.html", context)


def prestation_listing(request):
    """
    Renvoie la liste de toutes les prestations.
    """
    prestation_list = Prestation.objects.all()
    context = {"prestation_list": prestation_list}
    return render(request, "prestation/listing.html", context)


def contract_export(request, contract_id):
    """Génere un fichier PDF à fournir au client."""
    contract = get_object_or_404(Contract, pk=contract_id)

    if not contract.invoiced_date:
        today = pendulum.now().date()
        contract.invoiced_date = today
        contract.save()

    contract = Contract.objects.get(pk=contract_id)
    total_without_discount_htva = contract.get_contract_sum("total_amount_htva")
    total_without_discount_tvac = contract.get_contract_sum("total_amount_tvac")

    total_with_discount_htva = total_without_discount_htva
    total_with_discount_tvac = total_without_discount_tvac
    for discount in contract.discounts.all():
        total_with_discount_htva -= discount.amount_htva()
        total_with_discount_tvac -= discount.amount_tvac()

    context = {
        "contract": contract,
        "client": contract.client,
        "date": contract.invoiced_date,
        "prestations_list": contract.get_prestation.all(),
        # "discounts_list": discounts_list,
        # "discount_result": discount_result,
        # "prestations_count": prestations_count,
        "total_without_discount_htva": total_without_discount_htva,
        "total_without_discount_tvac": total_without_discount_tvac,
        "total_with_discount_htva": total_with_discount_htva,
        "total_with_discount_tvac": total_with_discount_tvac,
    }

    # return render(request, "to_pdf/facture.html", context)

    html = render_to_string("to_pdf/facture.html", context)
    response = HttpResponse(content_type="application/pdf")
    response[
        "Content-Disposition"
    ] = f"attachment; filename=facture.pdf"  # pylint: disable=line-too-long

    # font_config = FontConfiguration()
    HTML(string=html, base_url=request.build_absolute_uri()).write_pdf(
        response,
        stylesheets=[
            CSS(settings.STATICFILES_DIRS[0] + "/css/a4_paper.css"),
            CSS(settings.STATICFILES_DIRS[0] + "/css/black-dashboard_report.css"),
            CSS(settings.STATICFILES_DIRS[0] + "/css/to_pdf.css"),
        ],
    )  # , font_config=font_config)

    return response