ratatoskr-go/internal/opencode/client_test.go

package opencode

import (
	"context"
	"encoding/json"
	"errors"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"
)

// fakeAPIServer — минимальный фейк opencode serve v2 HTTP API (пути /api/*).
//
// Сценарии:
//   - нормальный: Prompt ставит active=false и в messages кладётся финальное
//     assistant-сообщение (verdictText) → Runner собирает вердикт;
//   - blockPrompt: «агент завис» — active=true всегда, сообщений нет → idle abort;
//   - failCreate / failMessages — имитация ошибок.
type fakeAPIServer struct {
	sessionID  string
	created    bool
	active     bool
	blockPrompt bool
	messages   []v2Message
	verdictText string
	failCreate  bool
	failMessages bool
	createdModel *ModelRef // модель, полученная на POST /api/session
	promptCalls int
}

func (f *fakeAPIServer) handler() http.Handler {
	mux := http.NewServeMux()
	mux.HandleFunc("/api/session", func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		if f.failCreate {
			http.Error(w, "boom", http.StatusInternalServerError)
			return
		}
		var in struct {
			Model *ModelRef `json:"model"`
		}
		_ = json.NewDecoder(r.Body).Decode(&in)
		f.createdModel = in.Model
		f.sessionID = "sess-fake"
		f.created = true
		writeJSON(w, map[string]any{"data": map[string]any{"id": "sess-fake"}})
	})
	mux.HandleFunc("/api/session/active", func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		data := map[string]any{}
		if f.active && f.sessionID != "" {
			data[f.sessionID] = map[string]any{"type": "running"}
		}
		writeJSON(w, map[string]any{"data": data})
	})
	mux.HandleFunc("/api/session/{id}/prompt", func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		f.promptCalls++
		if f.blockPrompt {
			// «зависший» агент: активен, но сообщений не появляется.
			f.active = true
		} else {
			f.active = false
		}
		writeJSON(w, map[string]any{"data": map[string]any{
			"id":          "msg_1",
			"sessionID":   f.sessionID,
			"timeCreated": time.Now().UnixMilli(),
		}})
	})
	mux.HandleFunc("/api/session/{id}/interrupt", func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		f.active = false
		w.WriteHeader(http.StatusNoContent)
	})
	mux.HandleFunc("/api/session/{id}/message", func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		if f.failMessages {
			http.Error(w, "db error", http.StatusInternalServerError)
			return
		}
		msgs := f.messages
		if msgs == nil && f.verdictText != "" && !f.blockPrompt {
			msgs = []v2Message{f.assistantMsg(f.verdictText)}
		}
		if msgs == nil {
			msgs = []v2Message{}
		}
		writeJSON(w, map[string]any{"data": msgs})
	})
	return mux
}

// assistantMsg строит завершённое assistant-сообщение с text-партом.
func (f *fakeAPIServer) assistantMsg(text string) v2Message {
	now := time.Now().UnixMilli()
	return v2Message{
		ID:      "msg_a",
		Type:    "assistant",
		Content: []v2Part{{Type: "text", Text: text}},
		Finish:  "end_turn",
		Time:    v2Time{Created: &now, Completed: &now},
	}
}

func writeJSON(w http.ResponseWriter, v any) {
	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(v)
}

// fakeClient — клиент к фейк-серверу.
func fakeClient(t *testing.T, f *fakeAPIServer) *Client {
	t.Helper()
	ts := httptest.NewServer(f.handler())
	t.Cleanup(ts.Close)
	return &Client{BaseURL: ts.URL}
}

func TestClient_CreateSession(t *testing.T) {
	f := &fakeAPIServer{}
	c := fakeClient(t, f)
	id, err := c.CreateSession(context.Background(), nil)
	if err != nil {
		t.Fatalf("CreateSession err: %v", err)
	}
	if id != "sess-fake" {
		t.Errorf("id = %q, want sess-fake", id)
	}
	if f.createdModel != nil {
		t.Errorf("createdModel = %+v, want nil", f.createdModel)
	}
}

func TestClient_CreateSessionHardpinsModel(t *testing.T) {
	want := &ModelRef{ProviderID: "tokentool", ID: "deepseek/deepseek-v4-flash-0731"}
	f := &fakeAPIServer{}
	c := fakeClient(t, f)
	if _, err := c.CreateSession(context.Background(), want); err != nil {
		t.Fatalf("CreateSession err: %v", err)
	}
	if f.createdModel == nil || f.createdModel.ProviderID != want.ProviderID || f.createdModel.ID != want.ID {
		t.Errorf("createdModel = %+v, want %+v", f.createdModel, want)
	}
}

func TestClient_CreateSessionFail(t *testing.T) {
	c := fakeClient(t, &fakeAPIServer{failCreate: true})
	if _, err := c.CreateSession(context.Background(), nil); err == nil {
		t.Fatal("CreateSession должен упасть при 500, а не nil")
	}
}

func TestClient_Prompt(t *testing.T) {
	c := fakeClient(t, &fakeAPIServer{})
	adm, err := c.Prompt(context.Background(), "sess-fake", "почини x")
	if err != nil {
		t.Fatalf("Prompt err: %v", err)
	}
	if adm.ID != "msg_1" {
		t.Errorf("adm.ID = %q, want msg_1", adm.ID)
	}
	if adm.TimeCreated == 0 {
		t.Error("adm.TimeCreated = 0, want epoch ms")
	}
}

func TestClient_Messages(t *testing.T) {
	now := time.Now().UnixMilli()
	f := &fakeAPIServer{messages: []v2Message{{
		ID: "msg_a", Type: "assistant",
		Content: []v2Part{{Type: "text", Text: "a"}, {Type: "reasoning", Text: "x"}},
		Finish:  "end_turn",
		Time:    v2Time{Created: &now, Completed: &now},
	}}}
	c := fakeClient(t, f)
	msgs, err := c.Messages(context.Background(), "sess-fake")
	if err != nil {
		t.Fatalf("Messages err: %v", err)
	}
	if len(msgs) != 1 {
		t.Fatalf("len(msgs) = %d, want 1", len(msgs))
	}
	if !msgs[0].finished() {
		t.Error("сообщение должно быть finished (Finish задан)")
	}
}

func TestClient_Active(t *testing.T) {
	f := &fakeAPIServer{active: true, sessionID: "sess-fake"}
	c := fakeClient(t, f)
	ok, err := c.Active(context.Background(), "sess-fake")
	if err != nil {
		t.Fatalf("Active err: %v", err)
	}
	if !ok {
		t.Error("Active = false, want true")
	}
	ok, _ = c.Active(context.Background(), "sess-other")
	if ok {
		t.Error("Active(чужой) = true, want false")
	}
}

func TestClient_Interrupt(t *testing.T) {
	c := fakeClient(t, &fakeAPIServer{})
	if err := c.Interrupt(context.Background(), "sess-fake"); err != nil {
		t.Fatalf("Interrupt err: %v", err)
	}
}

func Test_newestAssistant(t *testing.T) {
	older := time.Now().Add(-time.Minute).UnixMilli()
	newer := time.Now().UnixMilli()
	msgs := []v2Message{
		{ID: "a", Type: "assistant", Content: []v2Part{{Type: "text", Text: "x"}}, Time: v2Time{Created: &newer}},
		{ID: "b", Type: "user", Time: v2Time{Created: &newer}},
		{ID: "c", Type: "assistant", Content: []v2Part{{Type: "text", Text: "y"}}, Time: v2Time{Created: &older}},
	}
	cur, count := newestAssistant(msgs, older)
	if cur == nil || cur.ID != "a" {
		t.Errorf("newest = %v, want a", cur)
	}
	if count != 2 {
		t.Errorf("count = %d, want 2", count)
	}
	texts := assistantText(msgs, older)
	if len(texts) != 2 || texts[0] != "y" || texts[1] != "x" {
		t.Errorf("assistantText order = %v, want [y x]", texts)
	}
}

func Test_parseModelString(t *testing.T) {
	m := parseModelString("tokentool/deepseek/deepseek-v4-flash-0731")
	if m == nil || m.ProviderID != "tokentool" || m.ID != "deepseek/deepseek-v4-flash-0731" {
		t.Errorf("parse = %+v, want tokentool/deepseek-v4-flash-0731", m)
	}
	if parseModelString("onlyprovider") != nil {
		t.Error("parse без '/' должен вернуть nil")
	}
	if parseModelString("") != nil {
		t.Error("parse пустой должен вернуть nil")
	}
}

func TestClientErr_Unwrap(t *testing.T) {
	ce := &ClientErr{Op: "prompt", Err: errors.New("boom")}
	var target *ClientErr
	if !errors.As(ce, &target) {
		t.Fatal("expected *ClientErr")
	}
}