package main

// api_prepare_test.go — POST /api/repos/{repo}/prepare (ops prompt routing),
// GET /api/repos built flags, POST /api/spawn imageUsed resolution.

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

// TestAPIPrepareRepoRoutesToOps: with a live ops agent WS the prepare route
// delivers the prompt; without it the route 409s.
func TestAPIPrepareRepoRoutesToOps(t *testing.T) {
	useFakeGit(t, fakeGitModeOK)
	f := newFakeDocker()
	tsD := f.server(t)
	t.Setenv("DOCKER_HOST", "tcp://"+tsD.Listener.Addr().String())
	buildCtx := t.TempDir()
	if err := os.MkdirAll(filepath.Join(buildCtx, "docker"), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(buildCtx, "docker", "worker.Dockerfile"), []byte("FROM scratch\n"), 0o644); err != nil {
		t.Fatal(err)
	}
	t.Setenv(envWorkerDockerfile, filepath.Join(buildCtx, "docker", "worker.Dockerfile"))
	t.Setenv(envWorkerContext, buildCtx)
	t.Setenv(envRepoDir, t.TempDir())
	t.Setenv(envControlDockerfile, filepath.Join(buildCtx, "docker", "control.Dockerfile"))
	if err := os.WriteFile(filepath.Join(buildCtx, "docker", "control.Dockerfile"), []byte("FROM scratch\n"), 0o644); err != nil {
		t.Fatal(err)
	}
	t.Setenv("LVMH_TEST_OPS_BOOT_WAIT", "3s")

	daemonToken = testToken
	store := openTestStore(t)
	hub := NewHub(store)
	sp, err := NewSpawner(context.Background(), store, hub, "https://gitlab.example/")
	if err != nil {
		t.Fatal(err)
	}
	srv := &Server{store: store, hub: hub, spawn: sp, gitlab: NewGitLab(store, "https://gitlab.example")}
	ts := httptest.NewServer(srv.Routes(""))
	t.Cleanup(ts.Close)
	auth := testToken
	prepareURL := ts.URL + "/api/repos/g/p/prepare"

	// ops offline (and cannot come online — no real agent) → 409 after short wait
	if code, body := apiReq(t, http.MethodPost, prepareURL, auth, ""); code != http.StatusConflict {
		t.Fatalf("prepare offline = %d %s, want 409", code, body)
	}

	// path validation
	for _, path := range []string{"/api/repos/noslash/prepare", "/api/repos/g/p/notprepare"} {
		if code, _ := apiReq(t, http.MethodPost, ts.URL+path, auth, ""); code != http.StatusBadRequest {
			t.Fatalf("POST %s = %d, want 400", path, code)
		}
	}
	if code, _ := apiReq(t, http.MethodPost, prepareURL, "", ""); code != http.StatusUnauthorized {
		t.Fatal("prepare must require auth")
	}

	// online ops: prompt delivered on the ops session WS; the reset removes
	// the ops container + wipes its transcript first.
	if err := store.UpsertSession(SessionInfo{ID: opsSessionID}); err != nil {
		t.Fatal(err)
	}
	if err := store.AppendEvent(Event{SessionID: opsSessionID, Seq: 1, TS: 1, Type: "message_end", Payload: json.RawMessage(`{}`)}); err != nil {
		t.Fatal(err)
	}
	ws := dialAgent(t, ts)
	if err := ws.WriteJSON(helloFrame(opsSessionID)); err != nil {
		t.Fatalf("hello: %v", err)
	}
	if welcome := readFrame(t, ws); welcome["type"] != evWelcome {
		t.Fatalf("welcome = %v", welcome)
	}
	code, body := apiReq(t, http.MethodPost, ts.URL+"/api/repos/g%2Fp/prepare", auth, "")
	if code != http.StatusOK || !strings.Contains(body, `"ok":true`) {
		t.Fatalf("prepare = %d %s, want 200 ok", code, body)
	}
	prompt := readFrame(t, ws)
	if prompt["type"] != evPrompt {
		t.Fatalf("prompt frame = %v", prompt)
	}
	want := "prepare g/p: clone, build a worker image, register it"
	if prompt["message"] != want {
		t.Fatalf("prompt message = %q, want %q", prompt["message"], want)
	}
	// transcript wiped by the reset
	evs, err := store.EventsAfter(opsSessionID, 0, 100)
	if err != nil {
		t.Fatal(err)
	}
	if len(evs) != 0 {
		t.Fatalf("ops transcript not cleared: %d events", len(evs))
	}
}

func TestAPIRepoImagesBuiltFlag(t *testing.T) {
	ts, f := newSpawnAPIServer(t)
	auth := testToken
	custom := "lvmh-worker-group--project-ab12cd"
	f.imageTags = map[string]bool{imageRefWorker: true, custom: true}
	if code, _ := apiReq(t, http.MethodPut, ts.URL+"/api/repos/group/project/image", auth, `{"image":"`+custom+`"}`); code != http.StatusOK {
		t.Fatal("register custom image failed")
	}
	if code, _ := apiReq(t, http.MethodPut, ts.URL+"/api/repos/other/repo/image", auth, `{"image":"lvmh-worker-other"}`); code != http.StatusOK {
		t.Fatal("register second image failed")
	}

	code, body := apiReq(t, http.MethodGet, ts.URL+"/api/repos", auth, "")
	if code != http.StatusOK {
		t.Fatalf("repos = %d %s", code, body)
	}
	var rows []RepoImageRow
	if err := json.Unmarshal([]byte(body), &rows); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if len(rows) != 2 {
		t.Fatalf("rows = %+v", rows)
	}
	for _, r := range rows {
		wantBuilt := r.Image == custom
		if r.Built != wantBuilt {
			t.Fatalf("row %+v built = %v, want %v", r, r.Built, wantBuilt)
		}
	}

	// docker unreachable → 500, not a silent built=false
	f.failImages = true
	if code, body := apiReq(t, http.MethodGet, ts.URL+"/api/repos", auth, ""); code != http.StatusInternalServerError {
		t.Fatalf("repos with dead docker = %d %s, want 500", code, body)
	}
}

// TestAPISpawnImageUsed: the spawn response names the image the job will use
// (registry lookup), default or custom; the running job line carries it too.
func TestAPISpawnImageUsed(t *testing.T) {
	ts, f := newSpawnAPIServer(t)
	auth := testToken
	custom := "lvmh-worker-group--project-ab12cd"
	f.imageTags = map[string]bool{imageRefWorker: true, custom: true}

	// unregistered repo → default worker image
	code, body := apiReq(t, http.MethodPost, ts.URL+"/api/spawn", auth, `{"repo":"plain/repo"}`)
	if code != http.StatusCreated {
		t.Fatalf("default spawn = %d %s", code, body)
	}
	var res SpawnResult
	if err := json.Unmarshal([]byte(body), &res); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if res.ImageUsed != imageRefWorker {
		t.Fatalf("default imageUsed = %q, want %q", res.ImageUsed, imageRefWorker)
	}

	// registered + built custom image → custom in response and job line
	if code, _ := apiReq(t, http.MethodPut, ts.URL+"/api/repos/group/project/image", auth, `{"image":"`+custom+`"}`); code != http.StatusOK {
		t.Fatal("register custom failed")
	}
	code, body = apiReq(t, http.MethodPost, ts.URL+"/api/spawn", auth, `{"repo":"group/project"}`)
	if code != http.StatusCreated {
		t.Fatalf("custom spawn = %d %s", code, body)
	}
	if err := json.Unmarshal([]byte(body), &res); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if res.ImageUsed != custom {
		t.Fatalf("custom imageUsed = %q, want %q", res.ImageUsed, custom)
	}

	// running job snapshot reports the image
	var runningJob SpawnJob
	waitFor(t, 5*time.Second, func() bool {
		_, body := apiReq(t, http.MethodGet, ts.URL+"/api/spawn/status", auth, "")
		var jobs []SpawnJob
		_ = json.Unmarshal([]byte(body), &jobs)
		for _, j := range jobs {
			if j.SessionID == res.SessionID && j.State == stateRunning {
				runningJob = j
				return true
			}
		}
		return false
	})
	if runningJob.Message != "image "+custom {
		t.Fatalf("running message = %q, want %q", runningJob.Message, "image "+custom)
	}

	// registered but NOT built: response still names the custom image (the
	// job itself errors later with the ask-ops message)
	if code, _ := apiReq(t, http.MethodPut, ts.URL+"/api/repos/other/repo/image", auth, `{"image":"lvmh-worker-unbuilt"}`); code != http.StatusOK {
		t.Fatal("register unbuilt failed")
	}
	code, body = apiReq(t, http.MethodPost, ts.URL+"/api/spawn", auth, `{"repo":"other/repo"}`)
	if code != http.StatusCreated {
		t.Fatalf("unbuilt spawn = %d %s", code, body)
	}
	var res2 SpawnResult
	_ = json.Unmarshal([]byte(body), &res2)
	if res2.ImageUsed != "lvmh-worker-unbuilt" {
		t.Fatalf("unbuilt imageUsed = %q, want lvmh-worker-unbuilt", res2.ImageUsed)
	}
}