package server

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

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

func TestHTTPRouterIsAvailable(t *testing.T) {
	srv, err := New("0123456789abcdef0123456789abcdef", 3600, []string{"/healthz"})
	if err != nil {
		t.Fatal(err)
	}
	srv.HTTP.GET("/healthz", func(c *gin.Context) { c.Status(http.StatusNoContent) })

	request := httptest.NewRequest(http.MethodGet, "/healthz", nil)
	response := httptest.NewRecorder()
	srv.HTTP.ServeHTTP(response, request)
	if response.Code != http.StatusNoContent {
		t.Fatalf("unexpected status: %d", response.Code)
	}
}

// TestGatewayDispatchKeepsBusinessNotFound 守住 404 分流：网关未命中路由才回退 Gin，
// 业务 handler 返回的 404 必须原样透出，不能被 Gin 的纯文本 404 覆盖。
func TestGatewayDispatchKeepsBusinessNotFound(t *testing.T) {
	srv, err := New("0123456789abcdef0123456789abcdef", 3600, nil)
	if err != nil {
		t.Fatal(err)
	}
	if err := srv.Gateway.HandlePath(http.MethodPost, "/demo.Thing/Get", func(w http.ResponseWriter, _ *http.Request, _ map[string]string) {
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusNotFound)
		_, _ = w.Write([]byte(`{"code":5,"message":"record not found"}`))
	}); err != nil {
		t.Fatal(err)
	}
	srv.HTTP.POST("/rest/demo/ping", func(c *gin.Context) { c.String(http.StatusOK, "gin") })

	handler := srv.handler()

	t.Run("business not found", func(t *testing.T) {
		response := httptest.NewRecorder()
		handler.ServeHTTP(response, httptest.NewRequest(http.MethodPost, "/demo.Thing/Get", nil))
		if response.Code != http.StatusNotFound || !strings.Contains(response.Body.String(), "record not found") {
			t.Fatalf("business 404 was overwritten: status=%d body=%s", response.Code, response.Body.String())
		}
	})

	t.Run("gateway route miss", func(t *testing.T) {
		response := httptest.NewRecorder()
		handler.ServeHTTP(response, httptest.NewRequest(http.MethodPost, "/rest/demo/ping", nil))
		if response.Code != http.StatusOK || response.Body.String() != "gin" {
			t.Fatalf("gin fallback failed: status=%d body=%s", response.Code, response.Body.String())
		}
	})
}