package com.mfsys.uco.service;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mfsys.comm.exception.ApplicationException;
import com.mfsys.comm.exception.ApplicationExceptionMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.web.reactive.function.client.WebClientResponseException;
import reactor.core.publisher.Mono;

import java.io.IOException;

@Service
@Slf4j
public class WebClientDepositService {
    private final WebClient webClientDeposit;


    public WebClientDepositService(WebClient webClientDeposit) {
        this.webClientDeposit = webClientDeposit;
    }

    public Object getUcoAccountBalance(String url, String porOrgacode) {
        return handleResponse(webClientDeposit.get().uri(url).accept(MediaType.APPLICATION_JSON)
                        .header("SUS_USERCODE", porOrgacode)
                        .header("POR_ORGACODE", porOrgacode).retrieve().toEntity(Object.class),
                null);
    }

    public Object getCmpUcoAccounts(String url, String porOrgacode) {
        return handleResponse(webClientDeposit.get().uri(url).accept(MediaType.APPLICATION_JSON)
                        .header("SUS_USERCODE", porOrgacode)
                        .header("POR_ORGACODE", porOrgacode).retrieve().toEntity(Object.class),
                null);
    }

    public Object postTransaction(Object tranData, String url, String porOrgaCode) {
        return handleResponse(webClientDeposit.post().uri(url).bodyValue(tranData).accept(MediaType.APPLICATION_JSON)
                        .header("SUS_USERCODE", porOrgaCode)
                        .header("POR_ORGACODE", porOrgaCode).retrieve()
                        .toEntity(Object.class),
                porOrgaCode);
    }

    public String createUcoAccount(Object payload, String url, String porOrgaCode) {
        return handleResponse(webClientDeposit.post().uri(url).bodyValue(payload).accept(MediaType.APPLICATION_JSON)
                        .header("SUS_USERCODE", porOrgaCode)
                        .header("POR_ORGACODE", porOrgaCode).retrieve()
                        .toEntity(String.class),
                porOrgaCode);
    }
    public Object fetchExchangeRate(String url, String porOrgacode) {
        return handleResponse(webClientDeposit.get().uri(url).accept(MediaType.APPLICATION_JSON)
                        .header("SUS_USERCODE", porOrgacode)
                        .header("POR_ORGACODE", porOrgacode).retrieve().toEntity(Object.class),
                null);
    }
    public Object fetchUcoDepositProducts(String url, String porOrgacode) {
        return handleResponse(webClientDeposit.get().uri(url).accept(MediaType.APPLICATION_JSON)
                        .header("SUS_USERCODE", porOrgacode)
                        .header("POR_ORGACODE", porOrgacode).retrieve().toEntity(Object.class),
                null);
    }

    private <T> T handleResponse(Mono<ResponseEntity<T>> responseMono, String porgaCode) {
        try {
            ResponseEntity<T> response = responseMono.block();
            return response.getBody();
        } catch (WebClientResponseException e) {
            ApplicationExceptionMapper.APIError errorDetails = parseErrorDetails(e);
            log.error("UCO Error Status: {}", e.getStatusCode());
            log.error("UCO Error Body: {}", e.getResponseBodyAsString());
            log.error("UCO Request Headers: {}", e.getRequest().getHeaders());
            throw new ApplicationException(porgaCode, errorDetails.getErrorCode(), errorDetails.getArguments());
        }
    }

    private ApplicationExceptionMapper.APIError parseErrorDetails(WebClientResponseException e) {
        String errorCode = null;
        Object[] arguments = new Object[0];
        if (e.getResponseBodyAsString() != null) {
            try {
                ObjectMapper objectMapper = new ObjectMapper();
                JsonNode errorNode = objectMapper.readTree(e.getResponseBodyAsString());
                JsonNode errorCodeNode = errorNode.get("errorCode");
                if (errorCodeNode != null && !errorCodeNode.isNull()) {
                    errorCode = errorCodeNode.asText();
                } else {
                    JsonNode debugNode = errorNode.get("debugMessage");
                    errorCode = (debugNode != null && !debugNode.isNull()) ? debugNode.asText() : "ERR_REMOTE_" + e.getStatusCode().value();
                }
                JsonNode argsNode = errorNode.get("arguments");
                if (argsNode != null && !argsNode.isNull()) {
                    arguments = objectMapper.convertValue(argsNode, String[].class);
                }
            } catch (IOException ex) {
                errorCode = "ERR_REMOTE_" + e.getStatusCode().value();
            }
        } else {
            errorCode = "ERR_REMOTE_" + e.getStatusCode().value();
        }
        return new ApplicationExceptionMapper.APIError(errorCode, arguments);
    }
}