package ai

import (
	"bytes"
	"context"
	"encoding/json"
	"io"
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestLLMWirePreservesOpaqueScalarParamsWithoutDefaults(t *testing.T) {
	task, ps := currentFixture(t, "full_ai")
	task = changeCurrentAgent(t, task, func(a map[string]any) {
		a["llm"].(map[string]any)["params"] = map[string]any{"model": "ignored-params-model", "messages": "ignored-params-messages", "opaque": "vendor-value", "unknown_flag": false, "nullable": nil, "large_number": json.Number("9007199254740993"), "stream": false}
	})
	b, e := Bind(task, ps)
	if e != nil {
		t.Fatal(e)
	}
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		raw, e := io.ReadAll(r.Body)
		if e != nil {
			t.Error(e)
			return
		}
		if !bytes.Contains(raw, []byte(`"large_number":9007199254740993`)) {
			t.Error("large integer rewritten")
		}
		var body map[string]any
		if json.Unmarshal(raw, &body) != nil {
			t.Error("invalid request")
			return
		}
		if len(body) != 7 || body["stream"] != false || body["model"] != "example-chat" || body["opaque"] != "vendor-value" || body["unknown_flag"] != false || body["nullable"] != nil {
			t.Error("params dropped, rewritten or defaulted")
		}
		messages, ok := body["messages"].([]any)
		if !ok || len(messages) != 2 || messages[1].(map[string]any)["content"] != "Final user text" {
			t.Error("params overrode the task/session messages")
		}
		w.Header().Set("Content-Type", "application/json")
		io.WriteString(w, `{"choices":[{"message":{"role":"assistant","content":"ok"}}]}`)
	}))
	defer server.Close()
	b.LLM.Provider.Endpoint = server.URL + "/v1"
	result, e := b.Complete(context.Background(), "Final user text")
	if e != nil || result != "ok" {
		t.Fatal("LLM passthrough failed", e)
	}
}