pub mod transformers;

use api_models::webhooks::{IncomingWebhookEvent, ObjectReferenceId};
use common_enums::{CaptureMethod, PaymentMethod, PaymentMethodType};
use common_utils::{
    consts as common_consts,
    errors::CustomResult,
    ext_traits::BytesExt,
    request::{Method, Request, RequestBuilder, RequestContent},
    types::{AmountConvertor, MinorUnit, MinorUnitForConnector},
};
use error_stack::{report, ResultExt};
use hyperswitch_domain_models::{
    router_data::{AccessToken, ConnectorAuthType, ErrorResponse, RouterData},
    router_flow_types::{
        AccessTokenAuth, Authorize, Capture, Execute, PSync, PaymentMethodToken, RSync, Session,
        SetupMandate, Void,
    },
    router_request_types::{
        AccessTokenRequestData, PaymentMethodTokenizationData, PaymentsAuthorizeData,
        PaymentsCancelData, PaymentsCaptureData, PaymentsSessionData, PaymentsSyncData,
        RefundsData, SetupMandateRequestData,
    },
    router_response_types::{PaymentsResponseData, RefundsResponseData},
    types::{
        PaymentsAuthorizeRouterData, PaymentsCaptureRouterData, PaymentsSyncRouterData,
        RefundSyncRouterData, RefundsRouterData,
    },
};
use hyperswitch_interfaces::{
    api::{
        ConnectorAccessToken, ConnectorCommon, ConnectorCommonExt, ConnectorIntegration,
        ConnectorSpecifications, ConnectorValidation, MandateSetup, Payment, PaymentAuthorize,
        PaymentCapture, PaymentSession, PaymentSync, PaymentToken, PaymentVoid, Refund,
        RefundExecute, RefundSync,
    },
    configs::Connectors,
    errors::ConnectorError,
    events::connector_api_logs::ConnectorEvent,
    types::{
        PaymentsAuthorizeType, PaymentsCaptureType, PaymentsSyncType, RefundExecuteType,
        RefundSyncType, Response,
    },
    webhooks::{IncomingWebhook, IncomingWebhookRequestDetails, WebhookContext},
};
use hyperswitch_masking::{Mask as _, Maskable};
use transformers as dummyconnector;

use crate::{
    constants::headers,
    types::ResponseRouterData,
    utils::{construct_not_supported_error_report, convert_amount, RefundsRequestData as _},
};

#[derive(Clone)]
pub struct DummyConnector<const T: u8> {
    amount_converter: &'static (dyn AmountConvertor<Output = MinorUnit> + Sync),
}

impl<const T: u8> DummyConnector<T> {
    pub fn new() -> &'static Self {
        &Self {
            amount_converter: &MinorUnitForConnector,
        }
    }
}

impl<const T: u8> Payment for DummyConnector<T> {}
impl<const T: u8> PaymentSession for DummyConnector<T> {}
impl<const T: u8> ConnectorAccessToken for DummyConnector<T> {}
impl<const T: u8> MandateSetup for DummyConnector<T> {}
impl<const T: u8> PaymentAuthorize for DummyConnector<T> {}
impl<const T: u8> PaymentSync for DummyConnector<T> {}
impl<const T: u8> PaymentCapture for DummyConnector<T> {}
impl<const T: u8> PaymentVoid for DummyConnector<T> {}
impl<const T: u8> Refund for DummyConnector<T> {}
impl<const T: u8> RefundExecute for DummyConnector<T> {}
impl<const T: u8> RefundSync for DummyConnector<T> {}
impl<const T: u8> PaymentToken for DummyConnector<T> {}

impl<const T: u8>
    ConnectorIntegration<PaymentMethodToken, PaymentMethodTokenizationData, PaymentsResponseData>
    for DummyConnector<T>
{
    // Not Implemented (R)
}

impl<const T: u8, Flow, Request, Response> ConnectorCommonExt<Flow, Request, Response>
    for DummyConnector<T>
where
    Self: ConnectorIntegration<Flow, Request, Response>,
{
    fn build_headers(
        &self,
        req: &RouterData<Flow, Request, Response>,
        _connectors: &Connectors,
    ) -> CustomResult<Vec<(String, Maskable<String>)>, ConnectorError> {
        let mut header = vec![
            (
                headers::CONTENT_TYPE.to_string(),
                PaymentsAuthorizeType::get_content_type(self)
                    .to_string()
                    .into(),
            ),
            (
                common_consts::TENANT_HEADER.to_string(),
                req.tenant_id.get_string_repr().to_string().into(),
            ),
        ];
        let mut api_key = self.get_auth_header(&req.connector_auth_type)?;
        header.append(&mut api_key);
        Ok(header)
    }
}

impl<const T: u8> ConnectorCommon for DummyConnector<T> {
    fn id(&self) -> &'static str {
        Into::<transformers::DummyConnectors>::into(T).get_dummy_connector_id()
    }

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

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

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

    fn build_error_response(
        &self,
        res: Response,
        event_builder: Option<&mut ConnectorEvent>,
    ) -> CustomResult<ErrorResponse, ConnectorError> {
        let response: transformers::DummyConnectorErrorResponse = res
            .response
            .parse_struct("DummyConnectorErrorResponse")
            .change_context(ConnectorError::ResponseDeserializationFailed)?;

        event_builder.map(|i| i.set_error_response_body(&response));
        router_env::logger::info!(connector_response=?response);

        Ok(ErrorResponse {
            status_code: res.status_code,
            code: response.error.code,
            message: response.error.message,
            reason: response.error.reason,
            attempt_status: None,
            connector_transaction_id: None,
            connector_response_reference_id: None,
            network_advice_code: None,
            network_decline_code: None,
            network_error_message: None,
            connector_metadata: None,
        })
    }
}

impl<const T: u8> ConnectorValidation for DummyConnector<T> {
    fn validate_connector_against_payment_request(
        &self,
        capture_method: Option<CaptureMethod>,
        _payment_method: PaymentMethod,
        _pmt: Option<PaymentMethodType>,
    ) -> CustomResult<(), ConnectorError> {
        let capture_method = capture_method.unwrap_or_default();
        match capture_method {
            CaptureMethod::Automatic
            | CaptureMethod::Manual
            | CaptureMethod::SequentialAutomatic => Ok(()),
            CaptureMethod::ManualMultiple | CaptureMethod::Scheduled => Err(
                construct_not_supported_error_report(capture_method, self.id()),
            ),
        }
    }
}

impl<const T: u8> ConnectorIntegration<Session, PaymentsSessionData, PaymentsResponseData>
    for DummyConnector<T>
{
    //TODO: implement sessions flow
}

impl<const T: u8> ConnectorIntegration<AccessTokenAuth, AccessTokenRequestData, AccessToken>
    for DummyConnector<T>
{
}

impl<const T: u8> ConnectorIntegration<SetupMandate, SetupMandateRequestData, PaymentsResponseData>
    for DummyConnector<T>
{
    fn build_request(
        &self,
        _req: &RouterData<SetupMandate, SetupMandateRequestData, PaymentsResponseData>,
        _connectors: &Connectors,
    ) -> CustomResult<Option<Request>, ConnectorError> {
        Err(
            ConnectorError::NotImplemented("Setup Mandate flow for DummyConnector".to_string())
                .into(),
        )
    }
}

impl<const T: u8> ConnectorIntegration<Authorize, PaymentsAuthorizeData, PaymentsResponseData>
    for DummyConnector<T>
{
    fn get_headers(
        &self,
        req: &PaymentsAuthorizeRouterData,
        connectors: &Connectors,
    ) -> CustomResult<Vec<(String, Maskable<String>)>, ConnectorError> {
        self.build_headers(req, connectors)
    }

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

    fn get_url(
        &self,
        req: &PaymentsAuthorizeRouterData,
        connectors: &Connectors,
    ) -> CustomResult<String, ConnectorError> {
        match req.payment_method {
            PaymentMethod::Card
            | PaymentMethod::Upi
            | PaymentMethod::Wallet
            | PaymentMethod::PayLater => Ok(format!("{}/payment", self.base_url(connectors))),
            _ => Err(error_stack::report!(ConnectorError::NotSupported {
                message: format!("The payment method {} is not supported", req.payment_method),
                connector: Into::<transformers::DummyConnectors>::into(T).get_dummy_connector_id(),
            })),
        }
    }

    fn get_request_body(
        &self,
        req: &PaymentsAuthorizeRouterData,
        _connectors: &Connectors,
    ) -> CustomResult<RequestContent, ConnectorError> {
        let amount = convert_amount(
            self.amount_converter,
            req.request.minor_amount,
            req.request.currency,
        )?;

        let connector_router_data = dummyconnector::DummyConnectorRouterData::from((amount, req));
        let connector_req =
            transformers::DummyConnectorPaymentsRequest::<T>::try_from(&connector_router_data)?;
        Ok(RequestContent::Json(Box::new(connector_req)))
    }

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

    fn handle_response(
        &self,
        data: &PaymentsAuthorizeRouterData,
        event_builder: Option<&mut ConnectorEvent>,
        res: Response,
    ) -> CustomResult<PaymentsAuthorizeRouterData, ConnectorError> {
        let response: transformers::PaymentsResponse = res
            .response
            .parse_struct("DummyConnector PaymentsResponse")
            .change_context(ConnectorError::ResponseDeserializationFailed)?;
        event_builder.map(|i| i.set_response_body(&response));
        router_env::logger::info!(connector_response=?response);
        RouterData::try_from(ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(ConnectorError::ResponseHandlingFailed)
    }

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

impl<const T: u8> ConnectorIntegration<PSync, PaymentsSyncData, PaymentsResponseData>
    for DummyConnector<T>
{
    fn get_headers(
        &self,
        req: &PaymentsSyncRouterData,
        connectors: &Connectors,
    ) -> CustomResult<Vec<(String, Maskable<String>)>, ConnectorError> {
        self.build_headers(req, connectors)
    }

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

    fn get_url(
        &self,
        req: &PaymentsSyncRouterData,
        connectors: &Connectors,
    ) -> CustomResult<String, ConnectorError> {
        match req
            .request
            .connector_transaction_id
            .get_connector_transaction_id()
        {
            Ok(transaction_id) => Ok(format!(
                "{}/payments/{}",
                self.base_url(connectors),
                transaction_id
            )),
            Err(_) => Err(error_stack::report!(
                ConnectorError::MissingConnectorTransactionID
            )),
        }
    }

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

    fn handle_response(
        &self,
        data: &PaymentsSyncRouterData,
        event_builder: Option<&mut ConnectorEvent>,
        res: Response,
    ) -> CustomResult<PaymentsSyncRouterData, ConnectorError> {
        let response: transformers::PaymentsResponse = res
            .response
            .parse_struct("dummyconnector PaymentsSyncResponse")
            .change_context(ConnectorError::ResponseDeserializationFailed)?;
        event_builder.map(|i| i.set_response_body(&response));
        router_env::logger::info!(connector_response=?response);
        RouterData::try_from(ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(ConnectorError::ResponseHandlingFailed)
    }

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

impl<const T: u8> ConnectorIntegration<Capture, PaymentsCaptureData, PaymentsResponseData>
    for DummyConnector<T>
{
    fn get_headers(
        &self,
        req: &PaymentsCaptureRouterData,
        connectors: &Connectors,
    ) -> CustomResult<Vec<(String, Maskable<String>)>, ConnectorError> {
        self.build_headers(req, connectors)
    }

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

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

    fn get_request_body(
        &self,
        _req: &PaymentsCaptureRouterData,
        _connectors: &Connectors,
    ) -> CustomResult<RequestContent, ConnectorError> {
        Err(ConnectorError::NotImplemented("get_request_body method".to_string()).into())
    }

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

    fn handle_response(
        &self,
        data: &PaymentsCaptureRouterData,
        event_builder: Option<&mut ConnectorEvent>,
        res: Response,
    ) -> CustomResult<PaymentsCaptureRouterData, ConnectorError> {
        let response: transformers::PaymentsResponse = res
            .response
            .parse_struct("transformers PaymentsCaptureResponse")
            .change_context(ConnectorError::ResponseDeserializationFailed)?;
        event_builder.map(|i| i.set_response_body(&response));
        router_env::logger::info!(connector_response=?response);
        RouterData::try_from(ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(ConnectorError::ResponseHandlingFailed)
    }

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

impl<const T: u8> ConnectorIntegration<Void, PaymentsCancelData, PaymentsResponseData>
    for DummyConnector<T>
{
}

impl<const T: u8> ConnectorIntegration<Execute, RefundsData, RefundsResponseData>
    for DummyConnector<T>
{
    fn get_headers(
        &self,
        req: &RefundsRouterData<Execute>,
        connectors: &Connectors,
    ) -> CustomResult<Vec<(String, Maskable<String>)>, ConnectorError> {
        self.build_headers(req, connectors)
    }

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

    fn get_url(
        &self,
        req: &RefundsRouterData<Execute>,
        connectors: &Connectors,
    ) -> CustomResult<String, ConnectorError> {
        Ok(format!(
            "{}/{}/refund",
            self.base_url(connectors),
            req.request.connector_transaction_id
        ))
    }

    fn get_request_body(
        &self,
        req: &RefundsRouterData<Execute>,
        _connectors: &Connectors,
    ) -> CustomResult<RequestContent, ConnectorError> {
        let amount = convert_amount(
            self.amount_converter,
            req.request.minor_refund_amount,
            req.request.currency,
        )?;

        let connector_router_data = dummyconnector::DummyConnectorRouterData::from((amount, req));
        let connector_req =
            transformers::DummyConnectorRefundRequest::try_from(&connector_router_data)?;
        Ok(RequestContent::Json(Box::new(connector_req)))
    }

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

    fn handle_response(
        &self,
        data: &RefundsRouterData<Execute>,
        event_builder: Option<&mut ConnectorEvent>,
        res: Response,
    ) -> CustomResult<RefundsRouterData<Execute>, ConnectorError> {
        let response: transformers::RefundResponse = res
            .response
            .parse_struct("transformers RefundResponse")
            .change_context(ConnectorError::ResponseDeserializationFailed)?;
        event_builder.map(|i| i.set_response_body(&response));
        router_env::logger::info!(connector_response=?response);
        RouterData::try_from(ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(ConnectorError::ResponseHandlingFailed)
    }

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

impl<const T: u8> ConnectorIntegration<RSync, RefundsData, RefundsResponseData>
    for DummyConnector<T>
{
    fn get_headers(
        &self,
        req: &RefundSyncRouterData,
        connectors: &Connectors,
    ) -> CustomResult<Vec<(String, Maskable<String>)>, ConnectorError> {
        self.build_headers(req, connectors)
    }

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

    fn get_url(
        &self,
        req: &RefundSyncRouterData,
        connectors: &Connectors,
    ) -> CustomResult<String, ConnectorError> {
        let refund_id = req.request.get_connector_refund_id()?;
        Ok(format!(
            "{}/refunds/{}",
            self.base_url(connectors),
            refund_id
        ))
    }

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

    fn handle_response(
        &self,
        data: &RefundSyncRouterData,
        event_builder: Option<&mut ConnectorEvent>,
        res: Response,
    ) -> CustomResult<RefundSyncRouterData, ConnectorError> {
        let response: transformers::RefundResponse = res
            .response
            .parse_struct("transformers RefundSyncResponse")
            .change_context(ConnectorError::ResponseDeserializationFailed)?;
        event_builder.map(|i| i.set_response_body(&response));
        router_env::logger::info!(connector_response=?response);
        RouterData::try_from(ResponseRouterData {
            response,
            data: data.clone(),
            http_code: res.status_code,
        })
        .change_context(ConnectorError::ResponseHandlingFailed)
    }

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

#[async_trait::async_trait]
impl<const T: u8> IncomingWebhook for DummyConnector<T> {
    fn get_webhook_object_reference_id(
        &self,
        _request: &IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<ObjectReferenceId, ConnectorError> {
        Err(report!(ConnectorError::WebhooksNotImplemented))
    }

    fn get_webhook_event_type(
        &self,
        _request: &IncomingWebhookRequestDetails<'_>,
        _context: Option<&WebhookContext>,
    ) -> CustomResult<IncomingWebhookEvent, ConnectorError> {
        Ok(IncomingWebhookEvent::EventNotSupported)
    }

    fn get_webhook_resource_object(
        &self,
        _request: &IncomingWebhookRequestDetails<'_>,
    ) -> CustomResult<Box<dyn hyperswitch_masking::ErasedMaskSerialize>, ConnectorError> {
        Err(report!(ConnectorError::WebhooksNotImplemented))
    }
}

impl<const T: u8> ConnectorSpecifications for DummyConnector<T> {}
