from django.shortcuts import render
from django.http import JsonResponse, HttpResponse
import requests
import json
import base64
from authentication.models import UserData, Coupon
from django.views.decorators.csrf import csrf_exempt
from django.contrib.auth.decorators import login_required
from rest_framework.permissions import IsAuthenticated
from rest_framework.views import APIView
from io import BytesIO
from PIL import Image, ImageDraw
from barcode import Code128

authToken = 'fab57498544244e38bfc2741880f8d61:ed9628295b0642e1b38308795c9cdadd58012df4ceb84a3b9d441c017a1eeac0'


def create_barcode_from_binary(binary_text, height=100, line_width=2):
    """
    Create a barcode-like image from binary text where:
    1 = black line
    0 = white space
    
    Parameters:
    binary_text (str): String of 1s and 0s
    height (int): Height of the barcode in pixels
    line_width (int): Width of each line in pixels
    output_path (str): Path where the image will be saved
    """
    # Validate input
    if not all(c in '01' for c in binary_text):
        raise ValueError("Input must contain only 0s and 1s")

    # Calculate dimensions
    width = len(binary_text) * line_width

    # Create new white image
    image = Image.new('RGB', (width, height), 'white')
    draw = ImageDraw.Draw(image)

    # Draw black lines for each '1' in the binary text
    for i, bit in enumerate(binary_text):
        if bit == '1':
            x_position = i * line_width
            draw.line(
                [(x_position, 0), (x_position, height)],
                fill='black',
                width=line_width
            )
    return image

class HomeView(APIView):
    def get(self, request):
        message = "Welcome at home!"
        return Response({'message': message})

class BarCodeView(APIView):
    def get(self, request,code):
        barcode = Code128(code)
        encode = barcode.build()[0]
        barcode_image = create_barcode_from_binary(
            binary_text=encode,
            height=100,
            line_width=2
        )
        byte_io = BytesIO()
        barcode_image.save(byte_io, 'PNG')
        byte_io.seek(0)

        return HttpResponse(byte_io, content_type='image/png')

class EstablishmentListView(APIView):
    global authToken

    def get(self, request):
        url = "https://101smokeshop-uat.revelup.com/enterprise/Establishment/?order_by=id&limit=10&offset=0"
        headers = {
            'API-AUTHENTICATION': authToken
        }
        response = requests.get(url, headers=headers)
        data = response.json().get("objects", [])
        urlBase = "https://101smokeshop-uat.revelup.com"

        for i in range(len(data)):
            try:
                imgData = requests.get(urlBase + data[i]["logo_img"], headers=headers).json()
                data[i]["logo_img"] = imgData.get("image_url", "")
            except:
                pass
            try:
                data[i]["address"] = requests.get(urlBase + data[i]["address"], headers=headers).json()
            except:
                pass

        return JsonResponse({"data": data})


def resources_forward(request, resource_name,image_id):
    url = "https://101smokeshop-uat.revelup.com/resources/"+resource_name+"/"+image_id
    headers = {
        'API-AUTHENTICATION': authToken
    }
    response = requests.request("GET", url, headers=headers)
    imageUrl = response.json()["image_url"]
    response = requests.request("GET", imageUrl)
    return HttpResponse(response.content, content_type=response.headers['Content-Type']) 

def product_category(request):
    global authToken
    url = "https://101smokeshop-uat.revelup.com/products/ProductCategory/"
    headers = {
        'API-AUTHENTICATION': authToken
    }
    response = requests.request("GET", url, headers=headers)
    data = response.json()["objects"]
    return JsonResponse({"data": data})


class CouponListView(APIView):
    permission_classes = [IsAuthenticated]
    def get(self, request):
        discount_functions = ["CORE", "CUSTOMER", "LOYALTY", "GIFT_WITH_PURCHASE"]
        discount_methods = ["POINT_REDEMPTION", "REDEEMED", "GIVE_AWAY", "BONUS_COUPON", "VOUCHER_GENERIC", "VOUCHER_LOYALTY", "VOUCHER_FUEL", "VOUCHER_THIRDPARTY"]
        discount_types = ["AMOUNT", "PERCENT", "RE_PRICE", "ALT_PRICE"]
        how_often_apply = ["ALL_APPLICABLE", "ONCE_PER_ORDER", "ONCE_PER_SELECTION"]
        qualification_types = ["ALL", "ITEM", "ORDER"]
        rewards_types = ["PURCHASES", "ITEMS", "VISIT"]

        user = UserData.objects.get(user=request.user)
        coupons = user.coupons.all()
        redeemedCoupons = user.activatedCoupons.all()
        data = []
        for coupon in coupons:
            data.append({
                "name": coupon.name,
                "discription": coupon.discription,
                "pointsNeededForRedemption": coupon.pointsNeededForRedemption,
                "couponCode": coupon.couponCode,
                "loyaltyCode": coupon.loyaltyCode,
                "discount": coupon.discount,
                "isExpired": coupon.isExpired,
                "isRedeemed": coupon in redeemedCoupons,
                "expiryDate": coupon.expiryDate,
                "discountFunction": discount_functions[coupon.discountFunction],
                "discountMethod": discount_methods[coupon.discountMethod],
                "discountType": discount_types[coupon.discountType],
                "howOftenApply": how_often_apply[coupon.howOftenApply],
                "qualificationType": qualification_types[coupon.qualificationType],
                "rewardsType": rewards_types[coupon.rewardsType],
            })

        return JsonResponse({"data": data})


class CouponRedeemView(APIView):
    permission_classes = [IsAuthenticated]
    def post(self, request):
        couponCode = request.data["couponCode"]
        user = UserData.objects.get(user=request.user)
        coupon = Coupon.objects.get(couponCode=couponCode)
        if coupon not in user.coupons.all() or coupon == None:
            return JsonResponse({"message": "Coupon is not available for this user"})
        if coupon.isExpired:
            return JsonResponse({"message": "Coupon is expired"})
        if user.rewardPoints < coupon.pointsNeededForRedemption:
            return JsonResponse({"message": "You don't have enough points to redeem this coupon"})
        user.rewardPoints -= coupon.pointsNeededForRedemption
        user.save()
        user.activatedCoupons.add(coupon)
        return JsonResponse({"message": "Coupon redeemed successfully"})