package hostbox

import (
	"context"
	"database/sql"
	"errors"
	"os"
	"path/filepath"
	"testing"

	"github.com/carlosframework/platform/internal/hostclaim"
	"github.com/carlosframework/platform/internal/registry"
)

func TestFreeCensusProvesAbsenceWithoutInitializing(t *testing.T) {
	ctx := context.Background()
	db, err := OpenStopInventoryDB(filepath.Join(t.TempDir(), "inventory.db"))
	if err != nil {
		t.Fatal(err)
	}
	defer db.Close()
	reg, err := registry.Open(filepath.Join(t.TempDir(), "registry.db"))
	if err != nil {
		t.Fatal(err)
	}
	defer reg.Close()
	launches, err := OpenLaunchJournal(filepath.Join(t.TempDir(), "launches.db"))
	if err != nil {
		t.Fatal(err)
	}
	defer launches.Close()
	c := EmptyInstallationCensus{Inventory: db, Registry: reg, Launches: launches, Box: "box", Enrollment: "enrollment", DirectoryRevision: "revision", Roots: map[string]string{"data": t.TempDir(), "opt": t.TempDir(), "units": t.TempDir()}}
	obs := hostclaim.Observed{Host: "shop.example", Claim: &hostclaim.Claim{V: 2, Host: "shop.example", Gen: 1}}
	selected := RecordSelection{Host: obs.Host, Incarnation: "prior-inc"}
	if err = c.CheckLocal(ctx, obs, selected); err != nil {
		t.Fatal(err)
	}
	if err = c.Initialize(ctx, obs, selected); !errors.Is(err, ErrChanged) {
		t.Fatalf("free claim initialized: %v", err)
	}
	if _, err = db.ReadStopInventory(ctx, obs.Host); !errors.Is(err, sql.ErrNoRows) {
		t.Fatalf("cleanup census wrote inventory: %v", err)
	}
	// Prior complete inventory never suppresses physical examination for a Free claim.
	if err = db.WriteStopInventory(ctx, StopInventory{Complete: true, Host: obs.Host, Incarnation: selected.Incarnation, InstallationStamp: 1, Box: "box", Enrollment: "enrollment", DirectoryRevision: "revision"}); err != nil {
		t.Fatal(err)
	}
	path := filepath.Join(c.Roots["opt"], "unclassified")
	if err = os.WriteFile(path, []byte("leftover"), 0600); err != nil {
		t.Fatal(err)
	}
	if err = c.CheckLocal(ctx, obs, selected); !errors.Is(err, ErrTypedInventory) {
		t.Fatalf("complete metadata hid artifact: %v", err)
	}
	if err = os.Remove(path); err != nil {
		t.Fatal(err)
	}
	if err = c.CheckLocal(ctx, obs, selected); err != nil {
		t.Fatal(err)
	}
	obs.Claim.Op = hostclaim.Op{Kind: hostclaim.KindPurging, ID: "purge"}
	if err = c.CheckLocal(ctx, obs, selected); err == nil {
		t.Fatal("holderless active purge counted as Free")
	}
}