package app

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"runtime"
	"testing"
)

func TestHandleVersion(t *testing.T) {
	req := httptest.NewRequest("GET", "/version", nil)
	rr := httptest.NewRecorder()

	handleVersion(rr, req)

	if rr.Code != http.StatusOK {
		t.Errorf("Expected status 200, got %d", rr.Code)
	}

	contentType := rr.Header().Get("Content-Type")
	if contentType != "application/json" {
		t.Errorf("Expected Content-Type application/json, got %s", contentType)
	}

	var info VersionInfo
	if err := json.Unmarshal(rr.Body.Bytes(), &info); err != nil {
		t.Fatalf("Failed to decode response: %v", err)
	}

	// 验证版本字段
	if info.Version == "" {
		t.Error("Version should not be empty")
	}
	if info.Version != version {
		t.Errorf("Version = %q, want %q", info.Version, version)
	}

	// 验证 Go 版本
	if info.GoVersion != runtime.Version() {
		t.Errorf("GoVersion = %q, want %q", info.GoVersion, runtime.Version())
	}

	// Commit 和 BuildTime 可能为默认值
	if info.Commit == "" {
		t.Error("Commit should not be empty (may be 'unknown' during development)")
	}
	if info.BuildTime == "" {
		t.Error("BuildTime should not be empty (may be 'unknown' during development)")
	}
}

func TestVersionEndpoint_Integration(t *testing.T) {
	handler := NewAPIHandler("", ActionSet{}, "")

	req := httptest.NewRequest("GET", "/version", nil)
	rr := httptest.NewRecorder()

	handler.ServeHTTP(rr, req)

	if rr.Code != http.StatusOK {
		t.Errorf("Expected status 200, got %d", rr.Code)
	}

	var info VersionInfo
	if err := json.Unmarshal(rr.Body.Bytes(), &info); err != nil {
		t.Fatalf("Failed to decode response: %v", err)
	}

	if info.Version != version {
		t.Errorf("Version = %q, want %q", info.Version, version)
	}
}