package com.tzld.supply.proxy.controller;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.util.EntityUtils;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.ArgumentCaptor;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import java.io.ByteArrayInputStream;
import java.nio.charset.StandardCharsets;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.*;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

public class ProxyControllerTest {

    private MockMvc mockMvc;
    private HttpClient httpClient;
    private ProxyController proxyController;

    @BeforeEach
    public void setup() {
        httpClient = mock(HttpClient.class);
        proxyController = new ProxyController(httpClient);
        mockMvc = MockMvcBuilders.standaloneSetup(proxyController).build();
    }

    @Test
    public void testProxyPostWithBodyEncoding() throws Exception {
        String body = "{\"name\":\"测试\"}";
        String targetUrl = "http://example.com/api";

        // Mock response
        HttpResponse response = mock(HttpResponse.class);
        StatusLine statusLine = mock(StatusLine.class);
        HttpEntity responseEntity = mock(HttpEntity.class);

        when(httpClient.execute(any(HttpRequestBase.class))).thenReturn(response);
        when(response.getStatusLine()).thenReturn(statusLine);
        when(statusLine.getStatusCode()).thenReturn(200);
        when(response.getEntity()).thenReturn(responseEntity);
        when(responseEntity.getContent()).thenReturn(new ByteArrayInputStream("OK".getBytes()));

        mockMvc.perform(post("/proxy/test")
                .header("Target-URL", targetUrl)
                .contentType(MediaType.APPLICATION_JSON)
                .content(body))
                .andExpect(status().isOk());

        ArgumentCaptor<HttpRequestBase> argumentCaptor = ArgumentCaptor.forClass(HttpRequestBase.class);
        verify(httpClient).execute(argumentCaptor.capture());

        HttpRequestBase capturedRequest = argumentCaptor.getValue();
        if (capturedRequest instanceof HttpPost) {
            HttpPost httpPost = (HttpPost) capturedRequest;
            HttpEntity entity = httpPost.getEntity();
            // StringEntity default encoding is ISO-8859-1
            // We expect this to fail if the controller doesn't handle encoding correctly
            String capturedBody = EntityUtils.toString(entity, StandardCharsets.UTF_8);
            assertEquals(body, capturedBody, "Body content should match, checking for encoding issues");
        }
    }
}