package com.example.demo.controller;

import com.example.demo.service.HelloService;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;

import static org.mockito.Mockito.when;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@WebMvcTest(HelloController.class)
@DisplayName("HelloController Unit Tests")
class HelloControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private HelloService helloService;

    @Test
    @DisplayName("GET /api/hello returns default greeting")
    void greet_ReturnsDefaultGreeting() throws Exception {
        when(helloService.getGreeting()).thenReturn("Hello, World!");

        mockMvc.perform(get("/api/hello")
                        .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content().string("Hello, World!"));
    }

    @Test
    @DisplayName("GET /api/hello/{name} returns personalized greeting")
    void greetWithName_ReturnsPersonalizedGreeting() throws Exception {
        when(helloService.getGreetingFor("Developer")).thenReturn("Hello, Developer!");

        mockMvc.perform(get("/api/hello/Developer")
                        .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content().string("Hello, Developer!"));
    }
}