package models_test

import (
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"rocketgit.ru/rsmon/worker/app/models"
	"rocketgit.ru/rsmon/worker/spec/factories"
)

// TestNotificationGetContactsIncludesSystemContact exercises the regression
// reported when the production dump was restored into dev: the
// contacts.is_system column was missing and the GORM preload panicked on
// GetContacts. The fix has two layers:
//
//  1. AutoMigrate must add is_system (and deletion_requested_at) before the
//     notifier scheduler starts running.
//  2. GetContacts itself must not panic on a query error so a single bad row
//     cannot tear down the scheduler goroutine.
//
// This test verifies both layers by:
//   - asserting that the schema post-Migrate includes is_system, so the
//     production-like scenario no longer panics; and
//   - building a notification that contains a contact flagged is_system=true
//     and checking GetContacts returns it.
func TestNotificationGetContactsIncludesSystemContact(t *testing.T) {
	models.Drop()
	models.Migrate()

	// Column must exist after Migrate; otherwise GetContacts would fail
	// with the same panic we saw in production.
	assertColumnExists(t, "contacts", "is_system")

	account := &models.Account{Name: "acct-get-contacts"}
	require.NoError(t, models.DB().Create(account).Error)
	accountID := account.ID

	trueVal := true
	contact := &models.Contact{
		AccountID: &accountID,
		Name:      "system-admin",
		Kind:      "email",
		Value:     "ops@example.com",
		IsSystem:  &trueVal,
	}
	require.NoError(t, models.DB().Create(contact).Error)

	notification := factories.PersistedNotification(
		account, []int64{contact.ID}, nil, 300, false,
	)

	// Reload so the model has its persisted ID; the factory's PersistRelations
	// may have left ContactIDs empty on the returned value depending on the
	// GORM version, so fetch fresh.
	require.NoError(t, models.DB().
		Preload("Contacts").
		First(&notification, notification.ID).Error)

	got := notification.GetContacts()

	ids := make([]int64, 0, len(got))
	for _, c := range got {
		ids = append(ids, c.ID)
	}
	assert.Contains(t, ids, contact.ID, "GetContacts must include the is_system contact")
}

// TestUserDeletionRequestedAtColumnAndRoundTrip verifies the second missing
// column reported by the panic: users.deletion_requested_at. It asserts that
// AutoMigrate creates the column and that the field round-trips through the
// DB correctly. ProcessPendingDeletions (the consumer of this column) relies
// on it being present and queryable.
func TestUserDeletionRequestedAtColumnAndRoundTrip(t *testing.T) {
	models.Drop()
	models.Migrate()

	assertColumnExists(t, "users", "deletion_requested_at")

	user := factories.PersistedUser("deletion-roundtrip@test.ru", "secret")
	now := time.Now().UTC().Truncate(time.Microsecond)
	user.DeletionRequestedAt = &now

	require.NoError(t, models.DB().Save(&user).Error)

	reloaded := models.User{}
	require.NoError(t, models.DB().First(&reloaded, user.ID).Error)

	require.NotNil(t, reloaded.DeletionRequestedAt, "deletion_requested_at must round-trip via Save/First")
	assert.True(t, reloaded.DeletionRequestedAt.Equal(now),
		"deletion_requested_at must preserve the timestamp value (got %v, want %v)",
		reloaded.DeletionRequestedAt, now)

	// ProcessPendingDeletions should not panic on the populated schema and
	// must respect the cutoff: a recently-set deletion_requested_at is
	// still inside the 7-day grace period, so no hard-delete must occur.
	deleted, err := models.ProcessPendingDeletions()
	require.NoError(t, err)
	assert.Equal(t, 0, deleted, "users within the 7-day grace period must not be hard-deleted")
}

// TestProcessPendingDeletionsQueriesMissingColumnGracefully asserts that even
// if the deletion_requested_at column were missing, ProcessPendingDeletions
// would not panic (the panic-on-error pattern was historically present in
// other notifier helpers). We force the failure by renaming the column back,
// calling ProcessPendingDeletions, then restoring the column.
func TestProcessPendingDeletionsQueriesMissingColumnGracefully(t *testing.T) {
	models.Drop()
	models.Migrate()
	assertColumnExists(t, "users", "deletion_requested_at")

	// Simulate the production-missing-column scenario in a contained way:
	// rename the column so the SELECT against deletion_requested_at fails.
	require.NoError(t, models.DB().
		Exec("ALTER TABLE users RENAME COLUMN deletion_requested_at TO deletion_requested_at_hidden").Error)
	t.Cleanup(func() {
		// Restore so subsequent tests in this package keep working.
		_ = models.DB().
			Exec("ALTER TABLE users RENAME COLUMN deletion_requested_at_hidden TO deletion_requested_at").Error
	})

	// Must not panic; must return an error.
	assert.NotPanics(t, func() {
		_, err := models.ProcessPendingDeletions()
		assert.Error(t, err, "missing column must surface as an error, not a panic")
	})
}

// assertColumnExists checks that the given table has the given column by
// querying information_schema. It is the canary for the AutoMigrate step
// ordering bug: if the column is missing, every test that touches it will
// panic with SQLSTATE 42703.
func assertColumnExists(t *testing.T, table, column string) {
	t.Helper()
	var n int
	err := models.DB().Raw(
		`SELECT COUNT(*) FROM information_schema.columns
		   WHERE table_schema = current_schema()
		     AND table_name = ? AND column_name = ?`,
		table, column,
	).Scan(&n).Error
	require.NoError(t, err, "information_schema query must succeed")
	assert.Equal(t, 1, n, "table %q must have column %q after Migrate()", table, column)
}