package com.hithomelabs.cftunnels.Services;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.hithomelabs.cftunnels.Config.CloudflareConfig;
import com.hithomelabs.cftunnels.Entity.Tunnel;
import com.hithomelabs.cftunnels.Exceptions.ExternalServiceException;
import com.hithomelabs.cftunnels.Headers.AuthKeyEmailHeader;
import com.hithomelabs.cftunnels.Models.Config;
import com.hithomelabs.cftunnels.Models.Ingress;
import com.hithomelabs.cftunnels.Models.TunnelResponse;
import com.hithomelabs.cftunnels.Models.TunnelResult;
import com.hithomelabs.cftunnels.Models.TunnelsResponse;
import com.hithomelabs.cftunnels.Repositories.TunnelRepository;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.http.*;
import org.springframework.web.client.RestTemplate;

import java.io.IOException;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Optional;
import java.util.UUID;

import static com.hithomelabs.cftunnels.TestUtils.Util.getClassPathDataResource;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
class CloudflareAPIServiceTest {

    @InjectMocks
    private CloudflareAPIService cloudflareAPIService;

    @Mock
    AuthKeyEmailHeader authKeyEmailHeader;

    @Mock
    private RestTemplate restTemplate;

    @Mock
    CloudflareConfig cloudflareConfig;

    @Mock
    TunnelRepository tunnelRepository;

    private static final String tunnelResponseLargeIngressFile = "tunnelResponseLargeIngress.json";

    private static final String bigTunnelResponse;

    static {
        try {
            bigTunnelResponse = getClassPathDataResource(tunnelResponseLargeIngressFile);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    void testGetCloudflareTunnels() {

        when(cloudflareConfig.getAccountId()).thenReturn("account-123");
        when(authKeyEmailHeader.getHttpHeaders()).thenReturn(new HttpHeaders());
        List<TunnelResult> tunnelResults = List.of(new TunnelResult("t1", "test-tunnel"));
        TunnelsResponse mockBody = new TunnelsResponse(tunnelResults, null, null, true);
        ResponseEntity<TunnelsResponse> mockResponse = new ResponseEntity<>(mockBody, HttpStatus.OK);

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelsResponse.class)
        )).thenReturn(mockResponse);

        ResponseEntity<TunnelsResponse> response = cloudflareAPIService.getCloudflareTunnels();
        assertEquals(HttpStatus.OK, response.getStatusCode());
    }


    @Test
    void getCloudflareTunnelConfigurations() throws JsonProcessingException {

        when(cloudflareConfig.getAccountId()).thenReturn("account-123");
        when(authKeyEmailHeader.getHttpHeaders()).thenReturn(new HttpHeaders());

        TunnelResponse tunnelResponse = new ObjectMapper().readValue(bigTunnelResponse, TunnelResponse.class);
        ResponseEntity<TunnelResponse> tunnelResponseResponseEntity = new ResponseEntity<>(tunnelResponse, HttpStatus.OK);

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelResponse.class)
        )).thenReturn(tunnelResponseResponseEntity);

        ResponseEntity<TunnelResponse> response = cloudflareAPIService.getCloudflareTunnelConfigurations("sampleTunnelID", restTemplate, TunnelResponse.class);
        assertEquals(HttpStatus.OK, response.getStatusCode());
        assertEquals(response.getBody().getResult().getConfig().getIngress().get(0).getHostname(), "giteabkp.hithomelabs.com");
    }

    @Test
    void putCloudflareTunnelConfigurations() throws JsonProcessingException {

        when(cloudflareConfig.getAccountId()).thenReturn("account-123");
        when(authKeyEmailHeader.getHttpHeaders()).thenReturn(new HttpHeaders());

        TunnelResponse tunnelResponse = new ObjectMapper().readValue(bigTunnelResponse, TunnelResponse.class);
        ResponseEntity<TunnelResponse> tunnelResponseResponseEntity = new ResponseEntity<>(tunnelResponse, HttpStatus.OK);

        Config config = tunnelResponse.getResult().getConfig();

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.PUT),
                any(HttpEntity.class),
                eq(TunnelResponse.class)
        )).thenReturn(tunnelResponseResponseEntity);

        ResponseEntity<TunnelResponse> response = cloudflareAPIService.putCloudflareTunnelConfigurations("sampleTunnelID", restTemplate, TunnelResponse.class, config);
        assertEquals(HttpStatus.OK, response.getStatusCode());
        assertEquals(response.getBody().getResult().getConfig().getIngress().get(2).getHostname(), "random.hithomelabs.com");
    }

    @Test
    void createOrUpdateTunnel_Success() {
        String tunnelId = "50df9101-f625-4618-b7c5-100338a57124";
        String environment = "dev";

        List<TunnelResult> tunnelResults = List.of(new TunnelResult(tunnelId, "devtunnel"));
        TunnelsResponse mockBody = new TunnelsResponse(tunnelResults, null, null, true);
        ResponseEntity<TunnelsResponse> mockResponse = new ResponseEntity<>(mockBody, HttpStatus.OK);

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelsResponse.class)
        )).thenReturn(mockResponse);

        when(tunnelRepository.findById(UUID.fromString(tunnelId))).thenReturn(Optional.empty());

        Tunnel result = cloudflareAPIService.createOrUpdateTunnel(tunnelId, environment);

        assertEquals(UUID.fromString(tunnelId), result.getId());
        assertEquals("devtunnel", result.getName());
        assertEquals(environment, result.getEnvironment());
        verify(tunnelRepository).save(any(Tunnel.class));
    }

    @Test
    void createOrUpdateTunnel_UpdatesExistingTunnel() {
        String tunnelId = "50df9101-f625-4618-b7c5-100338a57124";
        String environment = "prod";

        List<TunnelResult> tunnelResults = List.of(new TunnelResult(tunnelId, "devtunnel"));
        TunnelsResponse mockBody = new TunnelsResponse(tunnelResults, null, null, true);
        ResponseEntity<TunnelsResponse> mockResponse = new ResponseEntity<>(mockBody, HttpStatus.OK);

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelsResponse.class)
        )).thenReturn(mockResponse);

        Tunnel existingTunnel = new Tunnel(UUID.fromString(tunnelId), "dev", "oldname");
        when(tunnelRepository.findById(UUID.fromString(tunnelId))).thenReturn(Optional.of(existingTunnel));

        cloudflareAPIService.createOrUpdateTunnel(tunnelId, environment);

        verify(tunnelRepository).deleteById(UUID.fromString(tunnelId));
        verify(tunnelRepository).save(any(Tunnel.class));
    }

    @Test
    void createOrUpdateTunnel_ThrowsExternalServiceExceptionOnApiError() {
        String tunnelId = "50df9101-f625-4618-b7c5-100338a57124";

        ResponseEntity<TunnelsResponse> mockResponse = new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelsResponse.class)
        )).thenReturn(mockResponse);

        assertThrows(ExternalServiceException.class, () ->
                cloudflareAPIService.createOrUpdateTunnel(tunnelId, "dev")
        );
    }

    @Test
    void createOrUpdateTunnel_ThrowsNoSuchElementExceptionWhenTunnelNotFound() {
        String tunnelId = "50df9101-f625-4618-b7c5-100338a57124";

        List<TunnelResult> tunnelResults = List.of(new TunnelResult("other-tunnel-id", "othertunnel"));
        TunnelsResponse mockBody = new TunnelsResponse(tunnelResults, null, null, true);
        ResponseEntity<TunnelsResponse> mockResponse = new ResponseEntity<>(mockBody, HttpStatus.OK);

        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelsResponse.class)
        )).thenReturn(mockResponse);

        assertThrows(NoSuchElementException.class, () ->
                cloudflareAPIService.createOrUpdateTunnel(tunnelId, "dev")
        );
    }

    @Test
    void getAllConfiguredTunnels_ReturnsAllTunnels() {
        List<Tunnel> tunnels = List.of(
                new Tunnel(UUID.fromString("50df9101-f625-4618-b7c5-100338a57124"), "dev", "devtunnel"),
                new Tunnel(UUID.fromString("60df9101-f625-4618-b7c5-100338a57125"), "prod", "prodtunnel")
        );
        when(tunnelRepository.findAll()).thenReturn(tunnels);

        List<Tunnel> result = cloudflareAPIService.getAllConfiguredTunnels();

        assertEquals(2, result.size());
        assertEquals("devtunnel", result.get(0).getName());
        assertEquals("prodtunnel", result.get(1).getName());
    }

    @Test
    void addTunnelIngress_Success() throws JsonProcessingException {
        String tunnelId = "50df9101-f625-4618-b7c5-100338a57124";
        Ingress ingress = new Ingress("http://192.168.0.100:8080", "test.hithomelabs.com", null, null);

        when(cloudflareConfig.getAccountId()).thenReturn("account-123");
        when(authKeyEmailHeader.getHttpHeaders()).thenReturn(new HttpHeaders());

        TunnelResponse tunnelResponse = new ObjectMapper().readValue(bigTunnelResponse, TunnelResponse.class);
        ResponseEntity<TunnelResponse> getResponse = new ResponseEntity<>(tunnelResponse, HttpStatus.OK);
        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.GET),
                any(HttpEntity.class),
                eq(TunnelResponse.class)
        )).thenReturn(getResponse);

        ResponseEntity<TunnelResponse> putResponse = new ResponseEntity<>(tunnelResponse, HttpStatus.OK);
        when(restTemplate.exchange(
                any(String.class),
                eq(HttpMethod.PUT),
                any(HttpEntity.class),
                eq(TunnelResponse.class)
        )).thenReturn(putResponse);

        ResponseEntity<TunnelResponse> result = cloudflareAPIService.addTunnelIngress(tunnelId, ingress);

        assertEquals(HttpStatus.OK, result.getStatusCode());
    }
}