package router_test

import (
	"net/http"
	"net/http/httptest"
	"testing"

	"lyra/internal/router"

	"github.com/gin-gonic/gin"
)

const (
	stubStatus = http.StatusAccepted
	stubBody   = "injected test handler"
)

// newStubHandlers 返回记录调用次数并输出固定状态码与响应体的替身处理器。
func newStubHandlers(calls *int) router.Handlers {
	return router.Handlers{
		TestHandler: func(c *gin.Context) {
			*calls++
			c.String(stubStatus, stubBody)
		},
	}
}

func TestRouteInvokesInjectedHandler(t *testing.T) {
	gin.SetMode(gin.TestMode)

	var calls int
	engine := gin.New()
	router.RegisterRoutes(engine, newStubHandlers(&calls))

	recorder := httptest.NewRecorder()
	engine.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/test", nil))

	if calls != 1 {
		t.Fatalf("GET /test 替身调用次数 = %d, want 1", calls)
	}
	if recorder.Code != stubStatus {
		t.Fatalf("GET /test status = %d, want %d", recorder.Code, stubStatus)
	}
	if got := recorder.Body.String(); got != stubBody {
		t.Fatalf("GET /test body = %q, want %q", got, stubBody)
	}
}

func TestRouteSkipsHandlerForUnknownPathOrMethod(t *testing.T) {
	gin.SetMode(gin.TestMode)

	tests := []struct {
		name   string
		method string
		path   string
	}{
		{name: "未知路径", method: http.MethodGet, path: "/unknown"},
		{name: "不支持的方法", method: http.MethodPost, path: "/test"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var calls int
			engine := gin.New()
			router.RegisterRoutes(engine, newStubHandlers(&calls))

			recorder := httptest.NewRecorder()
			engine.ServeHTTP(recorder, httptest.NewRequest(tt.method, tt.path, nil))

			if calls != 0 {
				t.Fatalf("%s %s 替身调用次数 = %d, want 0", tt.method, tt.path, calls)
			}
			if recorder.Code != http.StatusNotFound {
				t.Fatalf("%s %s status = %d, want %d", tt.method, tt.path, recorder.Code, http.StatusNotFound)
			}
		})
	}
}