import fetch from "node-fetch";

// set some important variables
// const { CLIENT_ID, APP_SECRET } = process.env;
// const base = "https://api-m.sandbox.paypal.com"; 


async function handleResponse(response) {
	if (response.status === 200 || response.status === 201) {
	  return response.json();
	}
  
	const errorMessage = await response.text();
	throw new Error(errorMessage);
}

// generate access token
export async function generateAccessToken(base,PaypalClientId,PaypalAppSecret) {
	console.log(PaypalClientId + ":" + PaypalAppSecret);
	const auth = Buffer.from(PaypalClientId + ":" + PaypalAppSecret).toString("base64");
	console.log(auth);
	const response = await fetch(`${base}/v1/oauth2/token`, {
	  method: "post",
	  body: "grant_type=client_credentials",
	  headers: {
		Authorization: `Basic ${auth}`,
	  },
	});
	const jsonData = await handleResponse(response);
	return jsonData.access_token;
}
  
// generate client token
export async function generateClientToken(base,PaypalClientId,PaypalAppSecret) {
const accessToken = await generateAccessToken(base, PaypalClientId,PaypalAppSecret);
const response = await fetch(`${base}/v1/identity/generate-token`, {
	method: "post",
	headers: {
	Authorization: `Bearer ${accessToken}`,
	"Accept-Language": "en_US",
	"Content-Type": "application/json",
	},
});
console.log('response', response.status)
const jsonData = await handleResponse(response);
return jsonData.client_token;
}

// call the create order method
export async function createOrder(base,data,PaypalClientId,PaypalAppSecret) {  
  const purchaseAmount = data.price;//"100.00"; // TODO: pull prices from a database 
  const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
  const url = `${base}/v2/checkout/orders`;
  console.log(url)
  const response = await fetch(url, {
    method: "post",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${accessToken}`,
    },
    body: JSON.stringify({
      intent: "CAPTURE",
      purchase_units: [
        {
          amount: {
            currency_code: "USD",
            value: purchaseAmount,
          },
        },
      ],
    }),
  });

  return handleResponse(response);
}

// capture payment for an order
export async function capturePayment(base,orderId,PaypalClientId,PaypalAppSecret) {
  const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
  const url = `${base}/v2/checkout/orders/${orderId}/capture`;
  const response = await fetch(url, {
    method: "post",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${accessToken}`,
    },
  });

  return handleResponse(response);
}


export async function verifyWebHook(base,PaypalClientId,PaypalAppSecret){
	const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
	const url = `${base}/v1/notifications/verify-webhook-signature`;
	// fetch('https://api-m.sandbox.paypal.com/v1/notifications/verify-webhook-signature', {
	const response = await fetch(url, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json',
			Authorization: `Bearer ${accessToken}`,
		},
		body: JSON.stringify({ 
			"transmission_id": "69cd13f0-d67a-11e5-baa3-778b53f4ae55", 
			"transmission_time": "2016-02-18T20:01:35Z", 
			"cert_url": "cert_url",       // PAYPAL-CERT-URL
			"auth_algo": "SHA256withRSA", // PAYPAL-AUTH-ALGO
			"transmission_sig": "lmI95Jx3Y9nhR5SJWlHVIWpg4AgFk7n9bCHSRxbrd8A9zrhdu2rMyFrmz+Zjh3s3boXB07VXCXUZy/UFzUlnGJn0wDugt7FlSvdKeIJenLRemUxYCPVoEZzg9VFNqOa48gMkvF+XTpxBeUx/kWy6B5cp7GkT2+pOowfRK7OaynuxUoKW3JcMWw272VKjLTtTAShncla7tGF+55rxyt2KNZIIqxNMJ48RDZheGU5w1npu9dZHnPgTXB9iomeVRoD8O/jhRpnKsGrDschyNdkeh81BJJMH4Ctc6lnCCquoP/GzCzz33MMsNdid7vL/NIWaCsekQpW26FpWPi/tfj8nLA==", 
			"webhook_id": "1JE4291016473214C", 
			"webhook_event": { 
				"id": "8PT597110X687430LKGECATA", 
				"create_time": "2013-06-25T21:41:28Z", 
				"resource_type": "authorization", 
				"event_type": "PAYMENT.AUTHORIZATION.CREATED", 
				"summary": "A payment authorization was created", 
				"resource": { 
					"id": "2DC87612EK520411B", 
					"create_time": "2013-06-25T21:39:15Z", 
					"update_time": "2013-06-25T21:39:17Z", 
					"state": "authorized", 
					"amount": { 
						"total": "7.47", 
						"currency": "USD", 
						"details": { 
							"subtotal": "7.47" 
						} 
					}, 
					"parent_payment": "PAY-36246664YD343335CKHFA4AY", 
					"valid_until": "2013-07-24T21:39:15Z", "links": [ 
						{ 
							"href": "https://api-m.paypal.com/v1/payments/authorization/2DC87612EK520411B", 
							"rel": "self", 
							"method": "GET" 
						}, 
						{ 
							"href": "https://api-m.paypal.com/v1/payments/authorization/2DC87612EK520411B/capture",
						 	"rel": "capture", 
						 	"method": "POST" 
						}, 
						{ 
							"href": "https://api-m.paypal.com/v1/payments/authorization/2DC87612EK520411B/void", 
							"rel": "void", 
							"method": "POST" 
						}, 
						{
							"href": "https://api-m.paypal.com/v1/payments/payment/PAY-36246664YD343335CKHFA4AY", 
							"rel": "parent_payment", 
							"method": "GET" 
						} 
					] 
				} 
			} 
		})// end body
	});// end fetch
	if (response.status === 200 || response.status === 201) {
		return response.json();
	}
	
	const errorMessage = await response.text();
	throw new Error(errorMessage);
}

export async function payout(base,PaypalClientId,PaypalAppSecret,data){
	const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
	const url = `${base}/v1/payments/payouts`;

	const response = await fetch(url, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json',
			'Authorization': `Bearer ${accessToken}`
		},
		body: data
	});
	return handleResponse(response);
}

// capture payment for an order
export async function refundPayment(base,PaypalClientId,PaypalAppSecret,orderId) { 
  const accessToken = await generateAccessToken(base, PaypalClientId,PaypalAppSecret);
  const url = `${base}/v2/payments/captures/${capture_id}/refund`;
  const response = await fetch(url, {
    method: "post",
    headers: {
      "Content-Type": "application/json",
      "Authorization": `Bearer ${accessToken}`,
      'PayPal-Request-Id': '123e4567-e89b-12d3-a456-426655440020',
      'Prefer': 'return=representation'
    },
    body: JSON.stringify(
      { 
        "amount": { "value": "10.00", "currency_code": "USD" }, 
        "invoice_id": "INVOICE-123", 
        "note_to_payer": "DefectiveProduct", 
        "payment_instruction": { 
            "platform_fees": [ 
              { 
                "amount": { 
                  "currency_code": "USD", 
                  "value": "1.00" 
                } 
              } 
            ] 
        } 
      })
  });

  return handleResponse(response);
}


export async function create_subscription_product(base,PaypalClientId,PaypalAppSecret,data){
	const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
	const url = `${base}/v1/catalogs/products`;

	// let data = {
	// 	"consumer": {
	// 		"accountNumber":1181198218909172527,
	// 		"merchantId":"5KW8F2FXKX5HA"
	// 	},
	// 	"merchant":{
	// 		"accountNumber":1659371090107732880,
	// 		"merchantId":"2J6QB8YJQSJRJ"
	// 	},
	// 	"apiCaller":{
	// 		"clientId":"AdtlNBDhgmQWi2xk6edqJVKklPFyDWxtyKuXuyVT-OgdnnKpAVsbKHgvqHHP",
	// 		"appId":"APP-6DV794347V142302B",
	// 		"payerId":"2J6QB8YJQSJRJ",
	// 		"accountNumber":"1659371090107732880"
	// 	},
	// 	"scopes":["https://api-m.paypal.com/v1/subscription/.*","https://uri.paypal.com/services/subscription","openid"]
	// }

	const response = await fetch(url, {
	//fetch('https://api-m.sandbox.paypal.com/v1/catalogs/products', {
		method: 'POST',
		headers: {  
			// 'X-PAYPAL-SECURITY-CONTEXT': '{"consumer":{"accountNumber":1181198218909172527,"merchantId":"5KW8F2FXKX5HA"},"merchant":{"accountNumber":1659371090107732880,"merchantId":"2J6QB8YJQSJRJ"},"apiCaller":{"clientId":"AdtlNBDhgmQWi2xk6edqJVKklPFyDWxtyKuXuyVT-OgdnnKpAVsbKHgvqHHP","appId":"APP-6DV794347V142302B","payerId":"2J6QB8YJQSJRJ","accountNumber":"1659371090107732880"},"scopes":["https://api-m.paypal.com/v1/subscription/.*","https://uri.paypal.com/services/subscription","openid"]}',
			'X-PAYPAL-SECURITY-CONTEXT': JSON.stringify(data),
			'Content-Type': 'application/json',
			'Accept': 'application/json',
			'PayPal-Request-Id': 'PRODUCT-18062019-001',
			'Prefer': 'return=representation'
		},
		body: JSON.stringify({ 
			"name": "Video Streaming Service", 
			"description": "Video streaming service", 
			"type": "SERVICE", 
			"category": "SOFTWARE", 
			"image_url": "https://example.com/streaming.jpg", 
			"home_url": "https://example.com/home" 
		})
	});


	return handleResponse(response);
}
export async function create_subscription_plan(base,PaypalClientId,PaypalAppSecret,data){
	const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
	const url = `${base}/v1/billing/plans`;
	// let data = {
	// 	"consumer":{
	// 		"accountNumber":1181198218909172527,
	// 		"merchantId":"5KW8F2FXKX5HA"
	// 	},
	// 	"merchant":{
	// 		"accountNumber":1659371090107732880,
	// 		"merchantId":"2J6QB8YJQSJRJ"
	// 	},
	// 	"apiCaller":{
	// 		"clientId":"AdtlNBDhgmQWi2xk6edqJVKklPFyDWxtyKuXuyVT-OgdnnKpAVsbKHgvqHHP",
	// 		"appId":"APP-6DV794347V142302B",
	// 		"payerId":"2J6QB8YJQSJRJ",
	// 		"accountNumber":"1659371090107732880"
	// 	},
	// 	"scopes":["https://api-m.paypal.com/v1/subscription/.*","https://uri.paypal.com/services/subscription","openid"]
	// };

	const response = await fetch(url, {
		// fetch('https://api-m.sandbox.paypal.com/v1/billing/plans', {
			method: 'POST',
			headers: {
				'X-PAYPAL-SECURITY-CONTEXT': JSON.stringify(data),
				'Content-Type': 'application/json',
				'Accept': 'application/json',
				'PayPal-Request-Id': 'PLAN-18062019-001',
				'Prefer': 'return=representation'
			},
			body: JSON.stringify({ 
				"product_id": "PROD-XXCD1234QWER65782", 
				"name": "Video Streaming Service Plan", 
				"description": "Video Streaming Service basic plan", 
				"status": "ACTIVE", 
				"billing_cycles": [ 
					{ 
						"frequency": { 
							"interval_unit": "MONTH",
							"interval_count": 1 
						}, 
						"tenure_type": "TRIAL", 
						"sequence": 1, 
						"total_cycles": 2,
						"pricing_scheme": { 
							"fixed_price": { 
								"value": "3", 
								"currency_code": "USD" 
							} 
						} 
					}, 
					{ 
						"frequency": { 
							"interval_unit": "MONTH", 
							"interval_count": 1 
						},
						"tenure_type": "TRIAL", 
						"sequence": 2, 
						"total_cycles": 3, 
						"pricing_scheme": { 
							"fixed_price": { 
								"value": "6", 
								"currency_code": "USD" 
							} 
						} 
					}, 
					{ 
						"frequency": { 
							"interval_unit": "MONTH", 
							"interval_count": 1 
						}, 
						"tenure_type": "REGULAR", 
						"sequence": 3, 
						"total_cycles": 12, 
						"pricing_scheme": { 
							"fixed_price": { 
								"value": "10", 
								"currency_code": 
								"USD" 
							} 
						} 
					} 
				], 
				"payment_preferences": { 
					"auto_bill_outstanding": true, 
					"setup_fee": { 
						"value": "10", 
						"currency_code": "USD" 
					}, "setup_fee_failure_action": "CONTINUE", 
					"payment_failure_threshold": 3 
				}, 
				"taxes": { 
					"percentage": "10", 
					"inclusive": false 
				} 
			})
		});
		


	return handleResponse(response);
}

export async function get_product_plan(base,PaypalClientId,PaypalAppSecret,data){
	const accessToken = await generateAccessToken(base,PaypalClientId,PaypalAppSecret);
	const url = `${base}/v1/catalogs/products?page_size=2&page=1&total_required=true`;


	const response = await fetch(url, {
	// fetch('https://api-m.sandbox.paypal.com/v1/catalogs/products?page_size=2&page=1&total_required=true', {
		headers: {
			'X-PAYPAL-SECURITY-CONTEXT': JSON.stringify(data),
			'Content-Type': 'application/json',
			'Accept': 'application/json',
			"Authorization": `Bearer ${accessToken}`,
		}
	});


	return handleResponse(response);
}