// Package queryapi_test — Milestone 2 user-route tests for the chatbot
// session and scope CRUD endpoints (plan §3, §10 M2, §11).
//
// Routes covered here:
//   - POST   /client/{clientId}/bot/sessions
//   - GET    /client/{clientId}/bot/sessions
//   - GET    /client/{clientId}/bot/sessions/{sessionId}
//   - PATCH  /client/{clientId}/bot/sessions/{sessionId}/scope
//
// Super-admin routes live in bot_super_admin_test.go. Turn endpoints
// belong to M4. Document schema/all-metadata belong to M5.
//
// Compile contract: this file references the generated types/methods
// (CreateBotSession, ListBotSessions, GetBotSession, PatchBotSessionScope
// and their request/response/params types) that backend-eng emits when
// the bot routes land in serviceAPIs/queryAPI.yaml and `task generate`
// runs. Until then the file fails to compile — the failing state the
// team-lead M2 dispatch endorsed.
//
// All tests use:
//   - real Postgres via internal/test.CreateDB
//   - the controller helpers established in customschemas_test.go
//     (newCustomSchemaContext, initializeTestConfig, ControllerConfig)
//   - testActorSubject as the default Cognito sub
//
// No mocks. No t.Skip beyond testing.Short. No commented-out tests.
package queryapi_test

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"

	queryapi "queryorchestration/api/queryAPI"
	"queryorchestration/internal/cognitoauth"
	"queryorchestration/internal/database/repository"
	"queryorchestration/internal/test"

	"github.com/google/uuid"
	"github.com/labstack/echo/v4"
	openapi_types "github.com/oapi-codegen/runtime/types"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// botOtherActorSubject is a second fake JWT subject used to prove
// owner-scoped visibility (plan §9). The two subjects must differ; the
// service treats them as opaque.
const botOtherActorSubject = "f1e2d3c4-b5a6-4789-9012-3456789abcde"

// newBotContext returns an echo.Context with the test actor's subject
// injected via user_claims. Mirrors newCustomSchemaContext but with the
// path-template and param wiring controlled here so different tests can
// vary the path. The body argument is JSON-marshaled if non-nil.
func newBotContext(t testing.TB, method, path string, body interface{}) (echo.Context, *httptest.ResponseRecorder) {
	t.Helper()
	return newBotContextAs(t, method, path, body, testActorSubject)
}

// newBotContextAs is newBotContext with an explicit subject so tests can
// drive the U2/cross-user matrix without copy-paste.
func newBotContextAs(t testing.TB, method, path string, body interface{}, subject string) (echo.Context, *httptest.ResponseRecorder) {
	t.Helper()
	e := echo.New()

	var reqBody []byte
	if body != nil {
		var err error
		reqBody, err = json.Marshal(body)
		require.NoError(t, err)
	}

	req := httptest.NewRequest(method, path, bytes.NewReader(reqBody))
	if reqBody != nil {
		req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
	}
	rec := httptest.NewRecorder()
	ctx := e.NewContext(req, rec)
	if subject != "" {
		ctx.Set("user_claims", map[string]interface{}{"sub": subject})
		ctx.Set("user_info", cognitoauth.UserInfo{Username: "client-user"})
	}
	return ctx, rec
}

// resetClientForBotTests cascades a client and every chatbot-relevant
// child row out of the DB so reruns of the same test start from a clean
// slate. The shared testcontainer Postgres reuses volumes across
// invocations, so leftover bot_sessions / bot_session_documents /
// bot_session_folders / bot_turns rows must be wiped before CreateClient
// or the FK-cascade chain on `clients.clientId` would otherwise re-create
// duplicates.
func resetClientForBotTests(t testing.TB, cfg *ControllerConfig, clientID string) {
	t.Helper()
	ctx := t.Context()
	pool := cfg.GetDBPool()
	stmts := []string{
		// bot_turns rows cascade away with their parent session, but the
		// session row depends on a clean clients chain. Drop anything that
		// could pin the clients row first.
		`DELETE FROM document_custom_metadata WHERE document_id IN (SELECT id FROM documents WHERE clientId = $1)`,
		`UPDATE documents SET custom_schema_id = NULL WHERE clientId = $1`,
		`DELETE FROM client_metadata_schemas WHERE client_id = $1`,
		`DELETE FROM documentEntries WHERE documentId IN (SELECT id FROM documents WHERE clientId = $1)`,
		`DELETE FROM documentFieldExtractionVersions WHERE documentId IN (SELECT id FROM documents WHERE clientId = $1)`,
		`DELETE FROM documentFieldExtractions WHERE documentId IN (SELECT id FROM documents WHERE clientId = $1)`,
		`DELETE FROM documentLabels WHERE documentId IN (SELECT id FROM documents WHERE clientId = $1)`,
		`DELETE FROM bot_session_documents WHERE document_id IN (SELECT id FROM documents WHERE clientId = $1)`,
		`DELETE FROM bot_session_folders WHERE folder_id IN (SELECT id FROM folders WHERE clientId = $1)`,
		`DELETE FROM bot_sessions WHERE client_id = $1`,
		`DELETE FROM documents WHERE clientId = $1`,
		`DELETE FROM folders WHERE clientId = $1`,
		`DELETE FROM clientCanSync WHERE clientId = $1`,
		`DELETE FROM clients WHERE clientId = $1`,
	}
	for _, stmt := range stmts {
		_, err := pool.Exec(ctx, stmt, clientID)
		require.NoErrorf(t, err, "reset stmt failed: %s", stmt)
	}
}

// seedBotSessionViaService creates a bot session through the real
// CreateBotSession handler so each test exercises the full handler->
// service->repository chain. Returns the parsed response.
func seedBotSessionViaService(t *testing.T, cons *queryapi.Controllers, clientID, subject string) queryapi.BotSessionResponse {
	t.Helper()
	body := queryapi.CreateBotSessionRequest{}
	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
	ctx, rec := newBotContextAs(t, http.MethodPost, path, body, subject)
	require.NoError(t, cons.CreateBotSession(ctx, clientID))
	require.Equal(t, http.StatusCreated, rec.Code)

	var resp queryapi.BotSessionResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	return resp
}

// seedDocumentForBot inserts a real documents row owned by clientID and
// returns its id. Bot scope tests need at least one same-client doc to
// add and one cross-client doc to reject.
func seedDocumentForBot(t *testing.T, cfg *ControllerConfig, clientID, hash string) uuid.UUID {
	t.Helper()
	docID, err := cfg.GetDBQueries().CreateDocument(t.Context(), &repository.CreateDocumentParams{
		Clientid: clientID,
		Hash:     hash,
	})
	require.NoError(t, err, "CreateDocument(clientID=%s) must succeed", clientID)
	return docID
}

// seedFolderForBot inserts a real folders row owned by clientID and
// returns its id.
func seedFolderForBot(t *testing.T, cfg *ControllerConfig, clientID, path string) uuid.UUID {
	t.Helper()
	folder, err := cfg.GetDBQueries().CreateFolder(t.Context(), &repository.CreateFolderParams{
		Path:      path,
		Parentid:  nil,
		Clientid:  clientID,
		Createdby: "tester",
	})
	require.NoError(t, err, "CreateFolder(clientID=%s) must succeed", clientID)
	return folder.ID
}

// asUUID converts a session id string from the response into the
// openapi_types.UUID the handlers accept on path parameters.
func asUUID(t testing.TB, id openapi_types.UUID) openapi_types.UUID {
	t.Helper()
	return id
}

// ---------- POST /client/{clientId}/bot/sessions ----------

// TestPostBotSession_OwnerCreates: client_user posts a session and the
// 201 response carries the documented BotSession entity shape from
// plan §3 / §4: id, clientId, createdBy, title (empty until first turn),
// state ({}), lastTurn (0), createdAt, updatedAt.
func TestPostBotSession_OwnerCreates(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_POST_OWN"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Post Owner")

	body := queryapi.CreateBotSessionRequest{}
	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
	ctx, rec := newBotContext(t, http.MethodPost, path, body)

	require.NoError(t, cons.CreateBotSession(ctx, clientID))
	require.Equal(t, http.StatusCreated, rec.Code)

	var resp queryapi.BotSessionResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	assert.NotEqual(t, uuid.Nil, uuid.UUID(resp.Id))
	assert.Equal(t, clientID, resp.ClientId)
	assert.Equal(t, testActorSubject, resp.CreatedBy)
	assert.Equal(t, "", resp.Title,
		"plan §6: title is empty until first turn arrives")
	assert.Equal(t, int32(0), resp.LastTurn,
		"new session has no terminal turns; lastTurn=0")
	assert.False(t, resp.CreatedAt.IsZero(), "createdAt must be set by DEFAULT NOW()")
	assert.False(t, resp.UpdatedAt.IsZero(), "updatedAt must be set by DEFAULT NOW()")
	// state defaults to '{}'::jsonb on the row; the response must reflect
	// that as an empty JSON object.
	assert.NotNil(t, resp.State)
}

// TestPostBotSession_NoSubject_401: with no Cognito subject in context,
// the handler returns 401.
func TestPostBotSession_NoSubject_401(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_POST_401"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Post 401")

	body := queryapi.CreateBotSessionRequest{}
	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
	// Empty subject means no user_claims is set on the context.
	ctx, _ := newBotContextAs(t, http.MethodPost, path, body, "")

	err := cons.CreateBotSession(ctx, clientID)
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusUnauthorized, httpErr.Code)
}

// ---------- GET /client/{clientId}/bot/sessions/{sessionId} ----------

// TestGetBotSession_Owner_200: the session creator can read their session
// back. lastTurn echoes last_terminal_ordinal (plan §4 derived note); a
// freshly created session has zero turns, so lastTurn must be 0.
func TestGetBotSession_Owner_200(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_GET_OWN"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Get Owner")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)

	path := fmt.Sprintf("/client/%s/bot/sessions/%s", clientID, created.Id)
	ctx, rec := newBotContext(t, http.MethodGet, path, nil)

	require.NoError(t, cons.GetBotSession(ctx, clientID, asUUID(t, created.Id)))
	require.Equal(t, http.StatusOK, rec.Code)

	var fetched queryapi.BotSessionResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &fetched))
	assert.Equal(t, created.Id, fetched.Id)
	assert.Equal(t, clientID, fetched.ClientId)
	assert.Equal(t, testActorSubject, fetched.CreatedBy)
	assert.Equal(t, int32(0), fetched.LastTurn,
		"plan §4: lastTurn = last_terminal_ordinal; no turns yet -> 0")
}

// TestGetBotSession_CrossClient_404: a session belonging to clientA must
// not be readable when the URL clientId is clientB.
func TestGetBotSession_CrossClient_404(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const (
		clientA = "BOT_M2_GET_X_A"
		clientB = "BOT_M2_GET_X_B"
	)
	resetClientForBotTests(t, cfg, clientA)
	resetClientForBotTests(t, cfg, clientB)
	test.CreateTestClient(t, cfg, clientA, "Bot M2 Get X A")
	test.CreateTestClient(t, cfg, clientB, "Bot M2 Get X B")

	created := seedBotSessionViaService(t, cons, clientA, testActorSubject)

	path := fmt.Sprintf("/client/%s/bot/sessions/%s", clientB, created.Id)
	ctx, _ := newBotContext(t, http.MethodGet, path, nil)

	err := cons.GetBotSession(ctx, clientB, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusNotFound, httpErr.Code,
		"plan §9: cross-client read must return 404")
}

// TestGetBotSession_OtherUserSameClient_404: U1 owns the session; U2 in
// the same client must see 404 because plan §9 mandates owner-scoped
// reads.
func TestGetBotSession_OtherUserSameClient_404(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_GET_OTHER_USER"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Get Other User")

	// U1 creates the session.
	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)

	// U2 attempts to read.
	path := fmt.Sprintf("/client/%s/bot/sessions/%s", clientID, created.Id)
	ctx, _ := newBotContextAs(t, http.MethodGet, path, nil, botOtherActorSubject)

	err := cons.GetBotSession(ctx, clientID, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusNotFound, httpErr.Code,
		"plan §9: same-client / other-user read must return 404")
}

// TestGetBotSession_DeletedSession_404: a session marked is_deleted=true
// is invisible even to its owner. Soft-delete is set by the super-admin
// DELETE handler; here we set the flag directly to isolate the read path.
func TestGetBotSession_DeletedSession_404(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_GET_DELETED"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Get Deleted")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)

	// Mark the session deleted at the row level.
	_, err := cfg.GetDBPool().Exec(t.Context(),
		`UPDATE bot_sessions SET is_deleted = true WHERE id = $1`,
		uuid.UUID(created.Id))
	require.NoError(t, err)

	path := fmt.Sprintf("/client/%s/bot/sessions/%s", clientID, created.Id)
	ctx, _ := newBotContext(t, http.MethodGet, path, nil)

	err = cons.GetBotSession(ctx, clientID, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusNotFound, httpErr.Code,
		"is_deleted=true session must not be returned to its owner")
}

// ---------- GET /client/{clientId}/bot/sessions ----------

// TestListBotSessions_OwnerVisibility: U1 has 3 sessions, U2 has 2 in
// the same client. U1's GET returns only U1's three sessions. The
// owner-scoped index from plan §4 backs this query.
func TestListBotSessions_OwnerVisibility(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_LIST_VIS"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 List Vis")

	// Seed 3 U1 sessions and 2 U2 sessions.
	u1Sessions := map[openapi_types.UUID]bool{}
	for i := 0; i < 3; i++ {
		s := seedBotSessionViaService(t, cons, clientID, testActorSubject)
		u1Sessions[s.Id] = true
	}
	for i := 0; i < 2; i++ {
		seedBotSessionViaService(t, cons, clientID, botOtherActorSubject)
	}

	// U1 lists.
	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
	ctx, rec := newBotContext(t, http.MethodGet, path, nil)

	require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{}))
	require.Equal(t, http.StatusOK, rec.Code)

	var resp queryapi.BotSessionListResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	assert.Len(t, resp.Sessions, 3, "U1 must see exactly its three sessions")
	for _, s := range resp.Sessions {
		assert.True(t, u1Sessions[s.Id],
			"session %s should belong to U1's seed set", s.Id)
		assert.Equal(t, testActorSubject, s.CreatedBy)
	}
}

// TestListBotSessions_LimitBounds: limit=0 -> 400; limit=201 -> 400;
// limit=200 accepted; limit=1 accepted. Plan §3 mandates [1, 200].
func TestListBotSessions_LimitBounds(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_LIST_LIM"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 List Lim")

	type tc struct {
		name   string
		limit  int32
		want   int
		reason string
	}
	cases := []tc{
		{name: "limit_zero_rejected", limit: 0, want: http.StatusBadRequest, reason: "below [1, 200]"},
		{name: "limit_negative_rejected", limit: -1, want: http.StatusBadRequest, reason: "negative"},
		{name: "limit_201_rejected", limit: 201, want: http.StatusBadRequest, reason: "above [1, 200]"},
		{name: "limit_one_accepted", limit: 1, want: http.StatusOK, reason: "lower bound inclusive"},
		{name: "limit_two_hundred_accepted", limit: 200, want: http.StatusOK, reason: "upper bound inclusive"},
	}

	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			ctx, rec := newBotContext(t, http.MethodGet, path, nil)
			limit := c.limit
			err := cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{
				Limit: &limit,
			})

			if c.want == http.StatusBadRequest {
				httpErr, ok := err.(*echo.HTTPError)
				require.Truef(t, ok, "expected *echo.HTTPError for %s, got %T: %v", c.reason, err, err)
				assert.Equal(t, c.want, httpErr.Code, "limit=%d (%s)", c.limit, c.reason)
				return
			}
			require.NoError(t, err, "limit=%d (%s) must be accepted", c.limit, c.reason)
			assert.Equal(t, c.want, rec.Code)
		})
	}
}

// TestListBotSessions_OffsetBounds: offset=-1 -> 400; offset=0 accepted.
// Plan §3 mandates offset >= 0.
func TestListBotSessions_OffsetBounds(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_LIST_OFF"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 List Off")

	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)

	t.Run("offset_negative_rejected", func(t *testing.T) {
		ctx, _ := newBotContext(t, http.MethodGet, path, nil)
		neg := int32(-1)
		err := cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{
			Offset: &neg,
		})
		httpErr, ok := err.(*echo.HTTPError)
		require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
		assert.Equal(t, http.StatusBadRequest, httpErr.Code)
	})

	t.Run("offset_zero_accepted", func(t *testing.T) {
		ctx, rec := newBotContext(t, http.MethodGet, path, nil)
		zero := int32(0)
		require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{
			Offset: &zero,
		}))
		assert.Equal(t, http.StatusOK, rec.Code)
	})
}

// TestListBotSessions_DefaultsAndPaging: a default request returns up
// to repo defaults; offset paging works (5 sessions, request limit=2
// offset=2 returns the middle two ordered by updated_at DESC per plan §4).
func TestListBotSessions_DefaultsAndPaging(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_LIST_PAGE"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 List Page")

	// Seed 5 sessions in order; we will assert the offset=2 limit=2 page
	// contains two sessions, regardless of which two — the seed order
	// flexes by updatedAt DESC, which is implementation-defined for ties
	// in this test (all five seeded back-to-back).
	for i := 0; i < 5; i++ {
		seedBotSessionViaService(t, cons, clientID, testActorSubject)
	}

	t.Run("defaults_return_all_five", func(t *testing.T) {
		path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
		ctx, rec := newBotContext(t, http.MethodGet, path, nil)
		require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{}))
		require.Equal(t, http.StatusOK, rec.Code)

		var resp queryapi.BotSessionListResponse
		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
		assert.Len(t, resp.Sessions, 5)
	})

	t.Run("offset_two_limit_two_returns_two", func(t *testing.T) {
		path := fmt.Sprintf("/client/%s/bot/sessions?limit=2&offset=2", clientID)
		ctx, rec := newBotContext(t, http.MethodGet, path, nil)

		limit := int32(2)
		offset := int32(2)
		require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{
			Limit:  &limit,
			Offset: &offset,
		}))
		require.Equal(t, http.StatusOK, rec.Code)

		var resp queryapi.BotSessionListResponse
		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
		assert.Len(t, resp.Sessions, 2,
			"offset=2 limit=2 over 5 rows must yield 2 sessions")
	})
}

// TestListBotSessions_TurnPreviewLimit: each session has 7 completed
// turns; per-session preview turn count is min(limit, cfg.RecentTurns).
// With cfg.RecentTurns=5 (default), limit=3 -> preview 3; limit=10 -> 5.
//
// Direct turn seeding via raw SQL: M2 does not yet expose a turns
// endpoint to seed via the API (that's M4). The SQL is identical to the
// M1 repository tests so any drift is caught by both layers.
func TestListBotSessions_TurnPreviewLimit(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_LIST_PREV"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 List Prev")

	// Seed two sessions, each with 7 completed turns.
	pool := cfg.GetDBPool()
	for i := 0; i < 2; i++ {
		s := seedBotSessionViaService(t, cons, clientID, testActorSubject)
		for ord := 1; ord <= 7; ord++ {
			_, err := pool.Exec(t.Context(), `
				INSERT INTO bot_turns (session_id, ordinal, prompt, status, attempt_id, completion)
				VALUES ($1, $2, $3, 'completed', $4, 'answer')
			`, uuid.UUID(s.Id), ord, fmt.Sprintf("p%d", ord), uuid.New())
			require.NoError(t, err)
		}
	}

	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)

	t.Run("limit_three_caps_preview_at_three", func(t *testing.T) {
		ctx, rec := newBotContext(t, http.MethodGet, path, nil)
		limit := int32(3)
		require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{
			Limit: &limit,
		}))
		require.Equal(t, http.StatusOK, rec.Code)

		var resp queryapi.BotSessionListResponse
		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
		require.Len(t, resp.Sessions, 2)
		for _, s := range resp.Sessions {
			assert.Len(t, s.RecentTurns, 3,
				"limit=3 cfg.RecentTurns=5 -> preview = min(3, 5) = 3")
		}
	})

	t.Run("limit_ten_caps_preview_at_recent_turns", func(t *testing.T) {
		ctx, rec := newBotContext(t, http.MethodGet, path, nil)
		limit := int32(10)
		require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{
			Limit: &limit,
		}))
		require.Equal(t, http.StatusOK, rec.Code)

		var resp queryapi.BotSessionListResponse
		require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
		// Service caps the inner preview at cfg.RecentTurns = 5 even when
		// the request asks for more sessions. The resp.Sessions length
		// is bounded by total seeded sessions (2), but each session's
		// recentTurns must be capped at 5.
		require.LessOrEqual(t, len(resp.Sessions), 10,
			"limit=10 over 2 sessions must yield at most 2 entries")
		for _, s := range resp.Sessions {
			assert.Len(t, s.RecentTurns, 5,
				"limit=10 cfg.RecentTurns=5 -> preview = min(10, 5) = 5")
		}
	})
}

// TestListBotSessions_LastTurnIsTerminal: a session with 3 completed
// turns plus 1 in-flight turn returns lastTurn=3 (the last terminal
// ordinal), not 4 (the last seen ordinal). Plan §4 derived note.
func TestListBotSessions_LastTurnIsTerminal(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_LIST_TERM"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 List Term")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)
	pool := cfg.GetDBPool()

	// 3 completed turns at ordinals 1..3.
	for ord := 1; ord <= 3; ord++ {
		_, err := pool.Exec(t.Context(), `
			INSERT INTO bot_turns (session_id, ordinal, prompt, status, attempt_id, completion)
			VALUES ($1, $2, $3, 'completed', $4, 'answer')
		`, uuid.UUID(created.Id), ord, fmt.Sprintf("p%d", ord), uuid.New())
		require.NoError(t, err)
	}
	// 1 in-flight turn at ordinal 4.
	_, err := pool.Exec(t.Context(), `
		INSERT INTO bot_turns (session_id, ordinal, prompt, status, attempt_id)
		VALUES ($1, 4, 'p4', 'in_flight', $2)
	`, uuid.UUID(created.Id), uuid.New())
	require.NoError(t, err)

	path := fmt.Sprintf("/client/%s/bot/sessions", clientID)
	ctx, rec := newBotContext(t, http.MethodGet, path, nil)
	require.NoError(t, cons.ListBotSessions(ctx, clientID, queryapi.ListBotSessionsParams{}))
	require.Equal(t, http.StatusOK, rec.Code)

	var resp queryapi.BotSessionListResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.Len(t, resp.Sessions, 1)
	assert.Equal(t, int32(3), resp.Sessions[0].LastTurn,
		"plan §4: lastTurn = last_terminal_ordinal; 3 completed + 1 in_flight -> 3")
}

// ---------- PATCH /client/{clientId}/bot/sessions/{sessionId}/scope ----------

// TestPatchScope_AddDocuments: PATCH adds three documents to a session;
// response shows three documents in the scope.
func TestPatchScope_AddDocuments(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_PATCH_ADD"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Patch Add")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)

	docA := seedDocumentForBot(t, cfg, clientID, "patch_add_doc_a")
	docB := seedDocumentForBot(t, cfg, clientID, "patch_add_doc_b")
	docC := seedDocumentForBot(t, cfg, clientID, "patch_add_doc_c")

	body := queryapi.BotSessionScopePatchRequest{
		AddDocuments: &[]openapi_types.UUID{docA, docB, docC},
	}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientID, created.Id)
	ctx, rec := newBotContext(t, http.MethodPatch, path, body)

	require.NoError(t, cons.PatchBotSessionScope(ctx, clientID, asUUID(t, created.Id)))
	require.Equal(t, http.StatusOK, rec.Code)

	var resp queryapi.BotSessionResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.NotNil(t, resp.Scope)
	assert.ElementsMatch(t,
		[]openapi_types.UUID{docA, docB, docC},
		resp.Scope.DocumentIds,
		"scope must reflect the three added documents")
}

// TestPatchScope_DedupesDuplicateIds: client sends duplicate docA in
// addDocuments; the persisted set is {docA, docB} once.
func TestPatchScope_DedupesDuplicateIds(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_PATCH_DUP"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Patch Dup")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)
	docA := seedDocumentForBot(t, cfg, clientID, "patch_dup_doc_a")
	docB := seedDocumentForBot(t, cfg, clientID, "patch_dup_doc_b")

	body := queryapi.BotSessionScopePatchRequest{
		AddDocuments: &[]openapi_types.UUID{docA, docA, docB},
	}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientID, created.Id)
	ctx, rec := newBotContext(t, http.MethodPatch, path, body)

	require.NoError(t, cons.PatchBotSessionScope(ctx, clientID, asUUID(t, created.Id)))
	require.Equal(t, http.StatusOK, rec.Code)

	var resp queryapi.BotSessionResponse
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.NotNil(t, resp.Scope)
	assert.ElementsMatch(t,
		[]openapi_types.UUID{docA, docB},
		resp.Scope.DocumentIds,
		"duplicate docA must be deduplicated to a single membership")
}

// TestPatchScope_AddRemoveSameId_400: a request that both adds and
// removes the same id is rejected with 400.
func TestPatchScope_AddRemoveSameId_400(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_PATCH_AR"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Patch AR")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)
	docA := seedDocumentForBot(t, cfg, clientID, "patch_ar_doc_a")

	body := queryapi.BotSessionScopePatchRequest{
		AddDocuments:    &[]openapi_types.UUID{docA},
		RemoveDocuments: &[]openapi_types.UUID{docA},
	}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientID, created.Id)
	ctx, _ := newBotContext(t, http.MethodPatch, path, body)

	err := cons.PatchBotSessionScope(ctx, clientID, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code,
		"add+remove of the same id must be 400")
}

// TestPatchScope_DocumentCrossClient_400: a document belonging to
// clientB cannot be added to a session in clientA. Dispatch:
// 400 with reason `document_cross_client`.
func TestPatchScope_DocumentCrossClient_400(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const (
		clientA = "BOT_M2_PATCH_X_A"
		clientB = "BOT_M2_PATCH_X_B"
	)
	resetClientForBotTests(t, cfg, clientA)
	resetClientForBotTests(t, cfg, clientB)
	test.CreateTestClient(t, cfg, clientA, "Bot M2 Patch X A")
	test.CreateTestClient(t, cfg, clientB, "Bot M2 Patch X B")

	created := seedBotSessionViaService(t, cons, clientA, testActorSubject)
	// Document belongs to clientB, not clientA.
	crossClientDoc := seedDocumentForBot(t, cfg, clientB, "patch_x_doc")

	body := queryapi.BotSessionScopePatchRequest{
		AddDocuments: &[]openapi_types.UUID{crossClientDoc},
	}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientA, created.Id)
	ctx, _ := newBotContext(t, http.MethodPatch, path, body)

	err := cons.PatchBotSessionScope(ctx, clientA, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code,
		"cross-client document add must be 400 (document_cross_client)")
}

// TestPatchScope_FolderCrossClient_400: a folder belonging to clientB
// cannot be added to a session in clientA. Same shape as the document
// test.
func TestPatchScope_FolderCrossClient_400(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const (
		clientA = "BOT_M2_PATCH_FX_A"
		clientB = "BOT_M2_PATCH_FX_B"
	)
	resetClientForBotTests(t, cfg, clientA)
	resetClientForBotTests(t, cfg, clientB)
	test.CreateTestClient(t, cfg, clientA, "Bot M2 Patch FX A")
	test.CreateTestClient(t, cfg, clientB, "Bot M2 Patch FX X B")

	created := seedBotSessionViaService(t, cons, clientA, testActorSubject)
	crossClientFolder := seedFolderForBot(t, cfg, clientB, "/patch-x-folder")

	body := queryapi.BotSessionScopePatchRequest{
		AddFolders: &[]openapi_types.UUID{crossClientFolder},
	}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientA, created.Id)
	ctx, _ := newBotContext(t, http.MethodPatch, path, body)

	err := cons.PatchBotSessionScope(ctx, clientA, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusBadRequest, httpErr.Code,
		"cross-client folder add must be 400 (folder_cross_client)")
}

// TestPatchScope_NoSession_404: PATCH to a non-existent session id
// returns 404.
func TestPatchScope_NoSession_404(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_PATCH_NF"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Patch NF")

	missingID := openapi_types.UUID(uuid.New())
	body := queryapi.BotSessionScopePatchRequest{}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientID, missingID)
	ctx, _ := newBotContext(t, http.MethodPatch, path, body)

	err := cons.PatchBotSessionScope(ctx, clientID, missingID)
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusNotFound, httpErr.Code)
}

// TestPatchScope_OtherUserSameClient_404: U1 owns the session; U2 in the
// same client cannot PATCH it (owner-scoped writes per plan §9).
func TestPatchScope_OtherUserSameClient_404(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	cfg := &ControllerConfig{}
	test.CreateDB(t, cfg)
	initializeTestConfig(t, cfg)

	svc := createControllerServices(cfg)
	cons := queryapi.NewControllers(svc, cfg)

	const clientID = "BOT_M2_PATCH_OU"
	resetClientForBotTests(t, cfg, clientID)
	test.CreateTestClient(t, cfg, clientID, "Bot M2 Patch OU")

	created := seedBotSessionViaService(t, cons, clientID, testActorSubject)

	body := queryapi.BotSessionScopePatchRequest{}
	path := fmt.Sprintf("/client/%s/bot/sessions/%s/scope", clientID, created.Id)
	ctx, _ := newBotContextAs(t, http.MethodPatch, path, body, botOtherActorSubject)

	err := cons.PatchBotSessionScope(ctx, clientID, asUUID(t, created.Id))
	httpErr, ok := err.(*echo.HTTPError)
	require.Truef(t, ok, "expected *echo.HTTPError, got %T: %v", err, err)
	assert.Equal(t, http.StatusNotFound, httpErr.Code,
		"plan §9: other-user PATCH must return 404")
}

// ---------- Authorization smoke ----------

// TestBotRoutes_PluralRouteAbsent: a request to the plural-form route
// /clients/{clientId}/bot/sessions must miss. Plan §3 spells out the
// Permit.io reasoning: existing policy gives client_user write
// permissions on resource `client`, not `clients`. Ensures no plural
// route slipped into the OpenAPI spec.
//
// We assert the OpenAPI spec contains zero `/clients/{...}/bot/`
// references; this is the most reliable check given the M2 spec is
// regenerated and tests run before the router is wired up by main.go.
func TestBotRoutes_PluralRouteAbsent(t *testing.T) {
	if testing.Short() {
		t.SkipNow()
	}
	swagger, err := queryapi.GetSwagger()
	require.NoError(t, err)
	require.NotNil(t, swagger.Paths)

	// Iterate over every declared path and prove none uses the plural
	// `/clients/{...}/bot/...` form.
	for _, p := range []string{
		"/clients/{clientId}/bot/sessions",
		"/clients/{clientId}/bot/sessions/{sessionId}",
		"/clients/{clientId}/bot/sessions/{sessionId}/scope",
	} {
		assert.Nil(t, swagger.Paths.Find(p),
			"plural route %s must not be registered (plan §3 mandates singular `client`)", p)
	}

	// Positive control: at least one of the singular bot routes must be
	// declared. If both this and the plural-absent assertion pass, the
	// spec correctly uses the singular form.
	for _, p := range []string{
		"/client/{clientId}/bot/sessions",
		"/client/{clientId}/bot/sessions/{sessionId}",
		"/client/{clientId}/bot/sessions/{sessionId}/scope",
	} {
		assert.NotNilf(t, swagger.Paths.Find(p),
			"singular bot route %s must be registered", p)
	}
}