mod transformers;

use std::fmt::Debug;

use common_utils::crypto;
use error_stack::{IntoReport, ResultExt};
use transformers as opennode;

use self::opennode::OpennodeWebhookDetails;
use crate::{
    configs::settings,
    connector::utils as conn_utils,
    core::errors::{self, CustomResult},
    db, headers,
    services::{self, ConnectorIntegration},
    types::{
        self,
        api::{self, ConnectorCommon, ConnectorCommonExt},
        ErrorResponse, Response,
    },
    utils::{BytesExt, Encode},
};

#[derive(Debug, Clone)]
pub struct Opennode;

impl api::Payment for Opennode {}
impl api::PaymentSession for Opennode {}
impl api::PaymentToken for Opennode {}
impl api::ConnectorAccessToken for Opennode {}

impl api::PreVerify for Opennode {}
impl api::PaymentAuthorize for Opennode {}
impl api::PaymentSync for Opennode {}
impl api::PaymentCapture for Opennode {}
impl api::PaymentVoid for Opennode {}
impl api::Refund for Opennode {}
impl api::RefundExecute for Opennode {}
impl api::RefundSync for Opennode {}

impl<Flow, Request, Response> ConnectorCommonExt<Flow, Request, Response> for Opennode
where
    Self: ConnectorIntegration<Flow, Request, Response>,
{
    fn build_headers(
        &self,
        req: &types::RouterData<Flow, Request, Response>,
        _connectors: &settings::Connectors,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        let mut header = vec![
            (
                headers::CONTENT_TYPE.to_string(),
                self.common_get_content_type().to_string(),
            ),
            (
                headers::ACCEPT.to_string(),
                self.common_get_content_type().to_string(),
            ),
        ];
        let mut api_key = self.get_auth_header(&req.connector_auth_type)?;
        header.append(&mut api_key);
        Ok(header)
    }
}

impl ConnectorCommon for Opennode {
    fn id(&self) -> &'static str {
        "opennode"
    }

    fn common_get_content_type(&self) -> &'static str {
        "application/json"
    }

    fn base_url<'a>(&self, connectors: &'a settings::Connectors) -> &'a str {
        connectors.opennode.base_url.as_ref()
    }

    fn get_auth_header(
        &self,
        auth_type: &types::ConnectorAuthType,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        let auth = opennode::OpennodeAuthType::try_from(auth_type)
            .change_context(errors::ConnectorError::FailedToObtainAuthType)?;
        Ok(vec![(headers::AUTHORIZATION.to_string(), auth.api_key)])
    }

    fn build_error_response(
        &self,
        res: Response,
    ) -> CustomResult<ErrorResponse, errors::ConnectorError> {
        let response: opennode::OpennodeErrorResponse = res
            .response
            .parse_struct("OpennodeErrorResponse")
            .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;

        Ok(ErrorResponse {
            status_code: res.status_code,
            code: response.code,
            message: response.message,
            reason: response.reason,
        })
    }
}

impl
    ConnectorIntegration<
        api::PaymentMethodToken,
        types::PaymentMethodTokenizationData,
        types::PaymentsResponseData,
    > for Opennode
{
    // Not Implemented (R)
}

impl ConnectorIntegration<api::Session, types::PaymentsSessionData, types::PaymentsResponseData>
    for Opennode
{
    //TODO: implement sessions flow
}

impl ConnectorIntegration<api::AccessTokenAuth, types::AccessTokenRequestData, types::AccessToken>
    for Opennode
{
}

impl ConnectorIntegration<api::Verify, types::VerifyRequestData, types::PaymentsResponseData>
    for Opennode
{
}

impl ConnectorIntegration<api::Authorize, types::PaymentsAuthorizeData, types::PaymentsResponseData>
    for Opennode
{
    fn get_headers(
        &self,
        req: &types::PaymentsAuthorizeRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        self.build_headers(req, connectors)
    }

    fn get_content_type(&self) -> &'static str {
        self.common_get_content_type()
    }

    fn get_url(
        &self,
        _req: &types::PaymentsAuthorizeRouterData,
        _connectors: &settings::Connectors,
    ) -> CustomResult<String, errors::ConnectorError> {
        Ok(format!("{}/v1/charges", self.base_url(_connectors)))
    }

    fn get_request_body(
        &self,
        req: &types::PaymentsAuthorizeRouterData,
    ) -> CustomResult<Option<String>, errors::ConnectorError> {
        let req_obj = opennode::OpennodePaymentsRequest::try_from(req)?;
        let opennode_req =
            Encode::<opennode::OpennodePaymentsRequest>::encode_to_string_of_json(&req_obj)
                .change_context(errors::ConnectorError::RequestEncodingFailed)?;
        Ok(Some(opennode_req))
    }

    fn build_request(
        &self,
        req: &types::PaymentsAuthorizeRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Option<services::Request>, errors::ConnectorError> {
        Ok(Some(
            services::RequestBuilder::new()
                .method(services::Method::Post)
                .url(&types::PaymentsAuthorizeType::get_url(
                    self, req, connectors,
                )?)
                .headers(types::PaymentsAuthorizeType::get_headers(
                    self, req, connectors,
                )?)
                .body(types::PaymentsAuthorizeType::get_request_body(self, req)?)
                .build(),
        ))
    }

    fn handle_response(
        &self,
        data: &types::PaymentsAuthorizeRouterData,
        res: Response,
    ) -> CustomResult<types::PaymentsAuthorizeRouterData, errors::ConnectorError> {
        let response: opennode::OpennodePaymentsResponse = res
            .response
            .parse_struct("Opennode PaymentsAuthorizeResponse")
            .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;
        types::RouterData::try_from(types::ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(errors::ConnectorError::ResponseHandlingFailed)
    }

    fn get_error_response(
        &self,
        res: Response,
    ) -> CustomResult<ErrorResponse, errors::ConnectorError> {
        self.build_error_response(res)
    }
}

impl ConnectorIntegration<api::PSync, types::PaymentsSyncData, types::PaymentsResponseData>
    for Opennode
{
    fn get_headers(
        &self,
        req: &types::PaymentsSyncRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        self.build_headers(req, connectors)
    }

    fn get_content_type(&self) -> &'static str {
        self.common_get_content_type()
    }

    fn get_url(
        &self,
        _req: &types::PaymentsSyncRouterData,
        _connectors: &settings::Connectors,
    ) -> CustomResult<String, errors::ConnectorError> {
        let connector_id = _req
            .request
            .connector_transaction_id
            .get_connector_transaction_id()
            .change_context(errors::ConnectorError::MissingConnectorTransactionID)?;
        Ok(format!(
            "{}/v2/charge/{}",
            self.base_url(_connectors),
            connector_id
        ))
    }

    fn build_request(
        &self,
        req: &types::PaymentsSyncRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Option<services::Request>, errors::ConnectorError> {
        Ok(Some(
            services::RequestBuilder::new()
                .method(services::Method::Get)
                .url(&types::PaymentsSyncType::get_url(self, req, connectors)?)
                .headers(types::PaymentsSyncType::get_headers(self, req, connectors)?)
                .build(),
        ))
    }

    fn handle_response(
        &self,
        data: &types::PaymentsSyncRouterData,
        res: Response,
    ) -> CustomResult<types::PaymentsSyncRouterData, errors::ConnectorError> {
        let response: opennode::OpennodePaymentsResponse = res
            .response
            .parse_struct("opennode PaymentsSyncResponse")
            .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;
        types::RouterData::try_from(types::ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(errors::ConnectorError::ResponseHandlingFailed)
    }

    fn get_error_response(
        &self,
        res: Response,
    ) -> CustomResult<ErrorResponse, errors::ConnectorError> {
        self.build_error_response(res)
    }
}

impl ConnectorIntegration<api::Capture, types::PaymentsCaptureData, types::PaymentsResponseData>
    for Opennode
{
    fn get_headers(
        &self,
        req: &types::PaymentsCaptureRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        self.build_headers(req, connectors)
    }

    fn get_content_type(&self) -> &'static str {
        self.common_get_content_type()
    }

    fn get_url(
        &self,
        _req: &types::PaymentsCaptureRouterData,
        _connectors: &settings::Connectors,
    ) -> CustomResult<String, errors::ConnectorError> {
        Err(errors::ConnectorError::NotImplemented("get_url method".to_string()).into())
    }

    fn get_request_body(
        &self,
        _req: &types::PaymentsCaptureRouterData,
    ) -> CustomResult<Option<String>, errors::ConnectorError> {
        Err(errors::ConnectorError::NotImplemented("get_request_body method".to_string()).into())
    }

    fn build_request(
        &self,
        req: &types::PaymentsCaptureRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Option<services::Request>, errors::ConnectorError> {
        Ok(Some(
            services::RequestBuilder::new()
                .method(services::Method::Post)
                .url(&types::PaymentsCaptureType::get_url(self, req, connectors)?)
                .headers(types::PaymentsCaptureType::get_headers(
                    self, req, connectors,
                )?)
                .build(),
        ))
    }

    fn handle_response(
        &self,
        data: &types::PaymentsCaptureRouterData,
        res: Response,
    ) -> CustomResult<types::PaymentsCaptureRouterData, errors::ConnectorError> {
        let response: opennode::OpennodePaymentsResponse = res
            .response
            .parse_struct("Opennode PaymentsCaptureResponse")
            .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;
        types::RouterData::try_from(types::ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(errors::ConnectorError::ResponseHandlingFailed)
    }

    fn get_error_response(
        &self,
        res: Response,
    ) -> CustomResult<ErrorResponse, errors::ConnectorError> {
        self.build_error_response(res)
    }
}

impl ConnectorIntegration<api::Void, types::PaymentsCancelData, types::PaymentsResponseData>
    for Opennode
{
}

impl ConnectorIntegration<api::Execute, types::RefundsData, types::RefundsResponseData>
    for Opennode
{
    fn get_headers(
        &self,
        req: &types::RefundsRouterData<api::Execute>,
        connectors: &settings::Connectors,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        self.build_headers(req, connectors)
    }

    fn get_content_type(&self) -> &'static str {
        self.common_get_content_type()
    }

    fn get_url(
        &self,
        _req: &types::RefundsRouterData<api::Execute>,
        _connectors: &settings::Connectors,
    ) -> CustomResult<String, errors::ConnectorError> {
        Err(errors::ConnectorError::NotImplemented("get_url method".to_string()).into())
    }

    fn get_request_body(
        &self,
        req: &types::RefundsRouterData<api::Execute>,
    ) -> CustomResult<Option<String>, errors::ConnectorError> {
        let req_obj = opennode::OpennodeRefundRequest::try_from(req)?;
        let opennode_req =
            Encode::<opennode::OpennodeRefundRequest>::encode_to_string_of_json(&req_obj)
                .change_context(errors::ConnectorError::RequestEncodingFailed)?;
        Ok(Some(opennode_req))
    }

    fn build_request(
        &self,
        req: &types::RefundsRouterData<api::Execute>,
        connectors: &settings::Connectors,
    ) -> CustomResult<Option<services::Request>, errors::ConnectorError> {
        let request = services::RequestBuilder::new()
            .method(services::Method::Post)
            .url(&types::RefundExecuteType::get_url(self, req, connectors)?)
            .headers(types::RefundExecuteType::get_headers(
                self, req, connectors,
            )?)
            .body(types::RefundExecuteType::get_request_body(self, req)?)
            .build();
        Ok(Some(request))
    }

    fn handle_response(
        &self,
        data: &types::RefundsRouterData<api::Execute>,
        res: Response,
    ) -> CustomResult<types::RefundsRouterData<api::Execute>, errors::ConnectorError> {
        let response: opennode::RefundResponse = res
            .response
            .parse_struct("opennode RefundResponse")
            .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;
        types::RouterData::try_from(types::ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(errors::ConnectorError::ResponseHandlingFailed)
    }

    fn get_error_response(
        &self,
        res: Response,
    ) -> CustomResult<ErrorResponse, errors::ConnectorError> {
        self.build_error_response(res)
    }
}

impl ConnectorIntegration<api::RSync, types::RefundsData, types::RefundsResponseData> for Opennode {
    fn get_headers(
        &self,
        req: &types::RefundSyncRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Vec<(String, String)>, errors::ConnectorError> {
        self.build_headers(req, connectors)
    }

    fn get_content_type(&self) -> &'static str {
        self.common_get_content_type()
    }

    fn get_url(
        &self,
        _req: &types::RefundSyncRouterData,
        _connectors: &settings::Connectors,
    ) -> CustomResult<String, errors::ConnectorError> {
        Err(errors::ConnectorError::NotImplemented("get_url method".to_string()).into())
    }

    fn build_request(
        &self,
        req: &types::RefundSyncRouterData,
        connectors: &settings::Connectors,
    ) -> CustomResult<Option<services::Request>, errors::ConnectorError> {
        Ok(Some(
            services::RequestBuilder::new()
                .method(services::Method::Get)
                .url(&types::RefundSyncType::get_url(self, req, connectors)?)
                .headers(types::RefundSyncType::get_headers(self, req, connectors)?)
                .build(),
        ))
    }

    fn handle_response(
        &self,
        data: &types::RefundSyncRouterData,
        res: Response,
    ) -> CustomResult<types::RefundSyncRouterData, errors::ConnectorError> {
        let response: opennode::RefundResponse = res
            .response
            .parse_struct("opennode RefundSyncResponse")
            .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;
        types::RouterData::try_from(types::ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(errors::ConnectorError::ResponseHandlingFailed)
    }

    fn get_error_response(
        &self,
        res: Response,
    ) -> CustomResult<ErrorResponse, errors::ConnectorError> {
        self.build_error_response(res)
    }
}

#[async_trait::async_trait]
impl api::IncomingWebhook for Opennode {
    fn get_webhook_source_verification_algorithm(
        &self,
        _request: &api::IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<Box<dyn crypto::VerifySignature + Send>, errors::ConnectorError> {
        Ok(Box::new(crypto::HmacSha256))
    }

    fn get_webhook_source_verification_signature(
        &self,
        request: &api::IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<Vec<u8>, errors::ConnectorError> {
        let notif = serde_urlencoded::from_bytes::<OpennodeWebhookDetails>(request.body)
            .into_report()
            .change_context(errors::ConnectorError::WebhookBodyDecodingFailed)?;
        let base64_signature = notif.hashed_order;
        hex::decode(base64_signature)
            .into_report()
            .change_context(errors::ConnectorError::WebhookSourceVerificationFailed)
    }

    fn get_webhook_source_verification_message(
        &self,
        request: &api::IncomingWebhookRequestDetails<'_>,
        _merchant_id: &str,
        _secret: &[u8],
    ) -> CustomResult<Vec<u8>, errors::ConnectorError> {
        let message = std::str::from_utf8(request.body)
            .into_report()
            .change_context(errors::ConnectorError::ParsingFailed)?;
        Ok(message.to_string().into_bytes())
    }

    async fn get_webhook_source_verification_merchant_secret(
        &self,
        db: &dyn db::StorageInterface,
        merchant_id: &str,
    ) -> CustomResult<Vec<u8>, errors::ConnectorError> {
        let key = conn_utils::get_webhook_merchant_secret_key(self.id(), merchant_id);
        let secret = match db.find_config_by_key(&key).await {
            Ok(config) => Some(config),
            Err(e) => {
                crate::logger::warn!("Unable to fetch merchant webhook secret from DB: {:#?}", e);
                None
            }
        };
        Ok(secret
            .map(|conf| conf.config.into_bytes())
            .unwrap_or_default())
    }

    fn get_webhook_object_reference_id(
        &self,
        request: &api::IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<api_models::webhooks::ObjectReferenceId, errors::ConnectorError> {
        let notif = serde_urlencoded::from_bytes::<OpennodeWebhookDetails>(request.body)
            .into_report()
            .change_context(errors::ConnectorError::WebhookBodyDecodingFailed)?;
        Ok(api_models::webhooks::ObjectReferenceId::PaymentId(
            api_models::payments::PaymentIdType::ConnectorTransactionId(notif.id),
        ))
    }

    fn get_webhook_event_type(
        &self,
        request: &api::IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<api::IncomingWebhookEvent, errors::ConnectorError> {
        let notif = serde_urlencoded::from_bytes::<OpennodeWebhookDetails>(request.body)
            .into_report()
            .change_context(errors::ConnectorError::WebhookBodyDecodingFailed)?;

        match notif.status {
            opennode::OpennodePaymentStatus::Paid => {
                Ok(api::IncomingWebhookEvent::PaymentIntentSuccess)
            }
            opennode::OpennodePaymentStatus::Underpaid
            | opennode::OpennodePaymentStatus::Expired => {
                Ok(api::IncomingWebhookEvent::PaymentActionRequired)
            }
            opennode::OpennodePaymentStatus::Processing => {
                Ok(api::IncomingWebhookEvent::PaymentIntentProcessing)
            }
            _ => Ok(api::IncomingWebhookEvent::EventNotSupported),
        }
    }

    fn get_webhook_resource_object(
        &self,
        request: &api::IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<serde_json::Value, errors::ConnectorError> {
        let notif = serde_urlencoded::from_bytes::<OpennodeWebhookDetails>(request.body)
            .into_report()
            .change_context(errors::ConnectorError::WebhookBodyDecodingFailed)?;
        Encode::<OpennodeWebhookDetails>::encode_to_value(&notif.status)
            .change_context(errors::ConnectorError::WebhookBodyDecodingFailed)
    }
}