// SPDX-License-Identifier: GPL-3.0-or-later

package baseline

import (
	"encoding/json"
	"os"
	"path/filepath"
	"testing"
	"time"

	"codeberg.org/anassaeneroi/enodia-sentinal/go-agent/internal/config"
	"codeberg.org/anassaeneroi/enodia-sentinal/go-agent/internal/model"
)

func TestManagerGraceAndDurableFirstSeenLifecycle(t *testing.T) {
	directory := t.TempDir()
	watched := filepath.Join(directory, "cron-entry")
	if err := os.WriteFile(watched, []byte("job"), 0o600); err != nil {
		t.Fatal(err)
	}
	start := time.Date(2026, 7, 20, 12, 0, 0, 0, time.UTC)
	now := start
	cfg := config.Default()
	cfg.LogDir = directory
	cfg.BaselineGrace = 10 * time.Second
	cfg.WatchPersistence = []string{watched}
	manager := New(cfg, func() []string { return []string{"/usr/bin/sudo"} })
	manager.Now = func() time.Time { return now }
	p := 42
	capture := func() (model.State, error) {
		return model.State{Sockets: []model.Socket{{
			State: "LISTEN", Local: "[::]:22", Comm: "sshd", PID: &p,
		}}}, nil
	}
	if err := manager.Initialize(capture); err != nil {
		t.Fatal(err)
	}

	now = start.Add(5 * time.Second)
	state := model.State{}
	if err := manager.Prepare(&state, now); err != nil {
		t.Fatal(err)
	}
	if state.ListenerBaseline != nil || state.PersistSince != nil {
		t.Fatalf("baseline detectors armed during grace: %#v", state)
	}
	if err := manager.Commit(state, now); err != nil {
		t.Fatal(err)
	}

	now = start.Add(11 * time.Second)
	state = model.State{}
	if err := manager.Prepare(&state, now); err != nil {
		t.Fatal(err)
	}
	if len(state.ListenerBaseline) != 1 || state.ListenerBaseline[0] != "22/sshd" {
		t.Fatalf("unexpected listener baseline: %#v", state.ListenerBaseline)
	}
	if state.PersistSince == nil || *state.PersistSince != float64(start.Add(5*time.Second).Unix()) {
		t.Fatalf("unexpected persistence boundary: %#v", state.PersistSince)
	}
	state.FirstSeenPublicDestinations["bash"] = []string{"8.8.8.8:443"}
	state.FirstSeenListenerPorts["nc"] = []string{"31337"}
	if err := manager.Commit(state, now); err != nil {
		t.Fatal(err)
	}

	raw, err := os.ReadFile(filepath.Join(directory, "first-seen.json"))
	if err != nil {
		t.Fatal(err)
	}
	var stored firstSeenStore
	if err := json.Unmarshal(raw, &stored); err != nil {
		t.Fatal(err)
	}
	if !stored.Initialized || stored.PublicDestinations["bash"][0] != "8.8.8.8:443" {
		t.Fatalf("unexpected first-seen store: %#v", stored)
	}
	for _, name := range []string{"listener-baseline.json", "suid-baseline.json"} {
		if _, err := os.Stat(filepath.Join(directory, name)); err != nil {
			t.Fatalf("missing %s: %v", name, err)
		}
	}
}

func TestLoadFirstSeenFailsOpenOnCorruptStore(t *testing.T) {
	path := filepath.Join(t.TempDir(), "first-seen.json")
	if err := os.WriteFile(path, []byte("{"), 0o600); err != nil {
		t.Fatal(err)
	}
	store := loadFirstSeen(path)
	if store.Initialized || store.Schema != firstSeenSchema ||
		store.PublicDestinations == nil || store.ListenerPorts == nil {
		t.Fatalf("unexpected fallback: %#v", store)
	}
}