package gemini

import (
	"context"
	"testing"

	"github.com/tidwall/gjson"
)

func TestConvertCodexResponseToGemini_StreamEmptyOutputUsesOutputItemDoneMessageFallback(t *testing.T) {
	ctx := context.Background()
	originalRequest := []byte(`{"tools":[]}`)
	var param any

	chunks := [][]byte{
		[]byte("data: {\"type\":\"response.output_item.done\",\"item\":{\"type\":\"message\",\"role\":\"assistant\",\"content\":[{\"type\":\"output_text\",\"text\":\"ok\"}]},\"output_index\":0}"),
		[]byte("data: {\"type\":\"response.completed\",\"response\":{\"usage\":{\"input_tokens\":1,\"output_tokens\":1}}}"),
	}

	var outputs [][]byte
	for _, chunk := range chunks {
		outputs = append(outputs, ConvertCodexResponseToGemini(ctx, "gemini-2.5-pro", originalRequest, nil, chunk, &param)...)
	}

	found := false
	for _, out := range outputs {
		if gjson.GetBytes(out, "candidates.0.content.parts.0.text").String() == "ok" {
			found = true
			break
		}
	}
	if !found {
		t.Fatalf("expected fallback content from response.output_item.done message; outputs=%q", outputs)
	}
}