package com.emotion.exception;

import com.emotion.common.Result;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.mock.web.MockHttpServletRequest;

import static org.junit.jupiter.api.Assertions.*;

/**
 * GlobalExceptionHandler 的 WechatApiException handler 单元测试
 *
 * 验证：
 * 1. 400 业务错误 → "微信授权失败，请重试"
 * 2. 500 内部错误 → "微信登录失败，请重试"
 * 3. 502 上游错误 → "微信服务暂不可用，请稍后重试"
 */
@ExtendWith(MockitoExtension.class)
class GlobalExceptionHandlerWechatTest {

    @InjectMocks
    private GlobalExceptionHandler handler;

    private MockHttpServletRequest request;

    @BeforeEach
    void setUp() {
        request = new MockHttpServletRequest();
        request.setMethod("POST");
        request.setRequestURI("/api/wechat/login");
    }

    @Test
    void handleWechatApiException_Code400_ReturnsBadRequestWithFriendlyMessage() {
        WechatApiException ex = new WechatApiException(400, "errcode=40029, errmsg=invalid code (internal detail)", "");

        Result<?> result = handler.handleWechatApiException(ex, request);

        assertNotNull(result);
        assertEquals("微信授权失败，请重试", result.getMessage());
        // Ensure internal detail is NOT exposed to frontend
        assertFalse(result.getMessage().contains("errcode"));
        assertFalse(result.getMessage().contains("40029"));
    }

    @Test
    void handleWechatApiException_Code500_ReturnsInternalErrorWithFriendlyMessage() {
        WechatApiException ex = new WechatApiException(500, "JSON parse failure at line 1 (internal detail)", "");

        Result<?> result = handler.handleWechatApiException(ex, request);

        assertNotNull(result);
        assertEquals("微信登录失败，请重试", result.getMessage());
        assertFalse(result.getMessage().contains("JSON"));
        assertFalse(result.getMessage().contains("parse"));
    }

    @Test
    void handleWechatApiException_Code502_ReturnsBadGatewayWithFriendlyMessage() {
        WechatApiException ex = new WechatApiException(502, "Connection refused: api.weixin.qq.com (internal detail)", "");

        Result<?> result = handler.handleWechatApiException(ex, request);

        assertNotNull(result);
        assertEquals("微信服务暂不可用，请稍后重试", result.getMessage());
        assertFalse(result.getMessage().contains("Connection"));
        assertFalse(result.getMessage().contains("refused"));
    }
}