package standard

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

	"github.com/dop251/goja"

	"reichard.io/poiesis/internal/builtin"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestFetchReturnsPromise(t *testing.T) {
	vm := goja.New()
	builtin.RegisterBuiltins(vm)

	result, err := vm.RunString(`fetch({input: "https://example.com"})`)
	require.NoError(t, err)

	promise, ok := result.Export().(*goja.Promise)
	require.True(t, ok, "fetch should return a Promise")
	assert.NotNil(t, promise)
}

func TestFetchAsyncAwait(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"status":"ok"}`))
	}))
	defer server.Close()

	vm := goja.New()
	builtin.RegisterBuiltins(vm)

	result, err := vm.RunString(`
		async function testFetch() {
			const response = await fetch({input: "` + server.URL + `"});
			return response.ok;
		}
		testFetch();
	`)
	require.NoError(t, err)

	promise, ok := result.Export().(*goja.Promise)
	require.True(t, ok, "async function should return a Promise")
	assert.NotNil(t, promise)
}