//go:build test

package scheduling

import (
	"context"
	"database/sql"
	"fmt"
	"testing"
	"time"

	"crussell/clock"
	"crussell/db"
	"crussell/internal/adminnotify"
	"crussell/testutils/fixtures"
)

// ============================================================
// NotifyUnpaidOneWeek Tests
// ============================================================

func TestNotifyUnpaidOneWeek_CreatesNotification(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// Create a booking that ended 14 days ago with no payment
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-14*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1, got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx,
		`SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_week_no_pay' AND booking_id = $1`,
		bookingID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != 1 {
		t.Errorf("expected 1 notification, got %d", dbCount)
	}

	var reason string
	err = tx.QueryRow(ctx,
		`SELECT reason FROM admin_notifications WHERE booking_id = $1`, bookingID).Scan(&reason)
	if err != nil {
		t.Fatalf("failed to query notification reason: %v", err)
	}
	if reason != "1_week_no_pay" {
		t.Errorf("expected reason '1_week_no_pay', got %q", reason)
	}
}

func TestNotifyUnpaidOneWeek_SkipsPaidBookings(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-14*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	_, err = fixtures.CreateTestPayment(tx, bookingID, 1000, "in_person_card", "full", "completed")
	if err != nil {
		t.Fatalf("failed to create payment: %v", err)
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for paid booking, got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx,
		`SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_week_no_pay' AND booking_id = $1`,
		bookingID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != 0 {
		t.Errorf("expected 0 notifications for paid booking, got %d", dbCount)
	}
}

func TestNotifyUnpaidOneWeek_SkipsRecentBookings(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-2*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for recent booking, got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx,
		`SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_week_no_pay' AND booking_id = $1`,
		bookingID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != 0 {
		t.Errorf("expected 0 notifications for recent booking, got %d", dbCount)
	}
}

func TestNotifyUnpaidOneWeek_Idempotent(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-14*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	n1, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("first call failed: %v", err)
	}
	if n1 != 1 {
		t.Errorf("expected count 1 on first call, got %d", n1)
	}

	n2, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("second call failed: %v", err)
	}
	if n2 != 0 {
		t.Errorf("expected count 0 on second call (idempotent), got %d", n2)
	}

	var dbCount int
	err = tx.QueryRow(ctx,
		`SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_week_no_pay' AND booking_id = $1`,
		bookingID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != 1 {
		t.Errorf("expected exactly 1 notification after 2 runs, got %d", dbCount)
	}
}

// ============================================================
// NotifyUnpaidOneMonth Tests
// ============================================================

func TestNotifyUnpaidOneMonth_CreatesNotification(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-45*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	n, err := NotifyUnpaidOneMonth(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneMonth failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1, got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx,
		`SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_month_no_pay' AND booking_id = $1`,
		bookingID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != 1 {
		t.Errorf("expected 1 notification, got %d", dbCount)
	}
}

func TestNotifyUnpaidOneMonth_SkipsPaidBookings(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-45*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	_, err = fixtures.CreateTestPayment(tx, bookingID, 1000, "in_person_card", "full", "completed")
	if err != nil {
		t.Fatalf("failed to create payment: %v", err)
	}

	n, err := NotifyUnpaidOneMonth(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneMonth failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for paid booking, got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx,
		`SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_month_no_pay' AND booking_id = $1`,
		bookingID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != 0 {
		t.Errorf("expected 0 notifications for paid booking, got %d", dbCount)
	}
}

// ============================================================
// TransitionDiscountCampaigns Tests
// ============================================================

func TestTransitionDiscountCampaigns_ActivatesDraft(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 10.0, 'draft', $2, $3)
		RETURNING id
	`, "Test Campaign", clock.Now().Add(-1*time.Hour), clock.Now().Add(24*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (activated), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "active" {
		t.Errorf("expected status 'active', got %q", status)
	}
}

func TestTransitionDiscountCampaigns_CompletesExpired(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 10.0, 'active', $2, $3)
		RETURNING id
	`, "Expired Campaign", clock.Now().Add(-48*time.Hour), clock.Now().Add(-1*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (completed), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "completed" {
		t.Errorf("expected status 'completed', got %q", status)
	}
}

func TestTransitionDiscountCampaigns_CompletesMaxRedemptions(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date, max_redemptions, times_redeemed)
		VALUES ($1, 'time_based', 10.0, 'active', $2, $3, 10, 10)
		RETURNING id
	`, "Full Campaign", clock.Now().Add(-48*time.Hour), clock.Now().Add(24*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (redemption limit), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "completed" {
		t.Errorf("expected status 'completed', got %q", status)
	}
}

func TestTransitionDiscountCampaigns_KeepsActiveCampaigns(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 10.0, 'active', $2, $3)
		RETURNING id
	`, "Active Campaign", clock.Now().Add(-24*time.Hour), clock.Now().Add(24*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 (no transitions needed), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "active" {
		t.Errorf("expected status 'active', got %q", status)
	}
}

func TestTransitionDiscountCampaigns_PreservesCancelled(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 10.0, 'cancelled', $2, $3)
		RETURNING id
	`, "Cancelled Campaign", clock.Now().Add(-48*time.Hour), clock.Now().Add(-1*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 (cancelled skipped), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "cancelled" {
		t.Errorf("expected status 'cancelled' to be preserved, got %q", status)
	}
}

// ============================================================
// CleanupExpiredVerificationCodes Tests
// ============================================================

func TestCleanupExpiredVerificationCodes_DeletesExpired(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var codeID string
	err = tx.QueryRow(ctx, `
		INSERT INTO verification_codes (user_id, purpose, code, expires_at)
		VALUES ($1, 'email_verify', 'EXPIRED01', $2)
		RETURNING id
	`, userID, clock.Now().Add(-1*time.Hour)).Scan(&codeID)
	if err != nil {
		t.Fatalf("failed to create expired code: %v", err)
	}

	n, err := CleanupExpiredVerificationCodes(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredVerificationCodes failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (expired), got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM verification_codes WHERE id = $1`, codeID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query code count: %v", err)
	}
	if dbCount != 0 {
		t.Error("expected expired code to be deleted")
	}
}

func TestCleanupExpiredVerificationCodes_DeletesOldUsed(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var codeID string
	err = tx.QueryRow(ctx, `
		INSERT INTO verification_codes (user_id, purpose, code, expires_at, used_at)
		VALUES ($1, 'email_verify', 'USEDOLD01', $2, $3)
		RETURNING id
	`, userID, clock.Now().Add(1*time.Hour), clock.Now().Add(-45*24*time.Hour)).Scan(&codeID)
	if err != nil {
		t.Fatalf("failed to create old used code: %v", err)
	}

	n, err := CleanupExpiredVerificationCodes(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredVerificationCodes failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (old used), got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM verification_codes WHERE id = $1`, codeID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query code count: %v", err)
	}
	if dbCount != 0 {
		t.Error("expected old used code to be deleted")
	}
}

func TestCleanupExpiredVerificationCodes_PreservesValid(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var codeID string
	err = tx.QueryRow(ctx, `
		INSERT INTO verification_codes (user_id, purpose, code, expires_at)
		VALUES ($1, 'email_verify', 'VALID001', $2)
		RETURNING id
	`, userID, clock.Now().Add(24*time.Hour)).Scan(&codeID)
	if err != nil {
		t.Fatalf("failed to create valid code: %v", err)
	}

	n, err := CleanupExpiredVerificationCodes(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredVerificationCodes failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 (valid preserved), got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM verification_codes WHERE id = $1`, codeID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query code count: %v", err)
	}
	if dbCount != 1 {
		t.Error("expected valid code to be preserved")
	}
}

// ============================================================
// CleanupExpiredRefreshTokens Tests
// ============================================================

func TestCleanupExpiredRefreshTokens_DeletesExpired(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var tokenID int
	err = tx.QueryRow(ctx, `
		INSERT INTO refresh_tokens (user_id, token_hash, role, expires_at)
		VALUES ($1, 'expired_hash', 'test', $2)
		RETURNING id
	`, userID, clock.Now().Add(-1*time.Hour)).Scan(&tokenID)
	if err != nil {
		t.Fatalf("failed to create expired token: %v", err)
	}

	n, err := CleanupExpiredRefreshTokens(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredRefreshTokens failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (expired), got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM refresh_tokens WHERE id = $1`, tokenID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query token count: %v", err)
	}
	if dbCount != 0 {
		t.Error("expected expired token to be deleted")
	}
}

func TestCleanupExpiredRefreshTokens_DeletesRevoked(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var tokenID int
	err = tx.QueryRow(ctx, `
		INSERT INTO refresh_tokens (user_id, token_hash, role, expires_at, revoked, created_at)
		VALUES ($1, 'revoked_hash', 'test', $2, TRUE, $3)
		RETURNING id
	`, userID, clock.Now().Add(24*time.Hour), clock.Now().Add(-100*24*time.Hour)).Scan(&tokenID)
	if err != nil {
		t.Fatalf("failed to create revoked token: %v", err)
	}

	n, err := CleanupExpiredRefreshTokens(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredRefreshTokens failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (revoked), got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM refresh_tokens WHERE id = $1`, tokenID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query token count: %v", err)
	}
	if dbCount != 0 {
		t.Error("expected revoked token to be deleted")
	}
}

func TestCleanupExpiredRefreshTokens_PreservesValid(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var tokenID int
	err = tx.QueryRow(ctx, `
		INSERT INTO refresh_tokens (user_id, token_hash, role, expires_at)
		VALUES ($1, 'valid_hash', 'test', $2)
		RETURNING id
	`, userID, clock.Now().Add(90*24*time.Hour)).Scan(&tokenID)
	if err != nil {
		t.Fatalf("failed to create valid token: %v", err)
	}

	n, err := CleanupExpiredRefreshTokens(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredRefreshTokens failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 (valid preserved), got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM refresh_tokens WHERE id = $1`, tokenID).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query token count: %v", err)
	}
	if dbCount != 1 {
		t.Error("expected valid token to be preserved")
	}
}

// ============================================================
// ApplyScheduledDefaultHours Tests
// ============================================================

// seedStagedDefaultHoursChange inserts one pending default-hours change due on
// the given London date and returns its id. Weekday 1 (Monday) is staged to
// 10:00-18:00 open (the seeded default is 09:00-17:00 open), so an applied
// change is observable on the working_hours row.
func seedStagedDefaultHoursChange(t *testing.T, ctx context.Context, tx db.Querier, effectiveDate string) int {
	t.Helper()
	var id int
	err := tx.QueryRow(ctx, `
		INSERT INTO default_hours_scheduled_changes (effective_date, hours)
		VALUES ($1::date, $2::jsonb)
		RETURNING id
	`, effectiveDate, `[{"weekday":1,"startTime":"10:00","endTime":"18:00","isOpen":true}]`).Scan(&id)
	if err != nil {
		t.Fatalf("failed to seed default hours change: %v", err)
	}
	return id
}

func getWorkingHoursForWeekday(t *testing.T, ctx context.Context, q db.Querier, weekday int) (start, end string, isOpen bool) {
	t.Helper()
	if err := q.QueryRow(ctx, `SELECT start_time, end_time, is_open FROM working_hours WHERE weekday = $1`, weekday).Scan(&start, &end, &isOpen); err != nil {
		t.Fatalf("failed to read working_hours for weekday %d: %v", weekday, err)
	}
	return start, end, isOpen
}

// TestApplyScheduledDefaultHours_AppliesStagedChange seeds a default-hours
// change with effective_date YESTERDAY (London), runs ApplyScheduledDefaultHours
// and asserts the working_hours row was updated, the change marked applied_at,
// and the flood-capped 'default_hours_changed' admin notification inserted.
func TestApplyScheduledDefaultHours_AppliesStagedChange(t *testing.T) {
	ctx, tx := resetTestData(t)

	yesterday := LondonDateString(clock.Now().Add(-24 * time.Hour))
	changeID := seedStagedDefaultHoursChange(t, ctx, tx, yesterday)

	n, err := ApplyScheduledDefaultHours(ctx)
	if err != nil {
		t.Fatalf("ApplyScheduledDefaultHours failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected 1 applied change, got %d", n)
	}

	start, end, isOpen := getWorkingHoursForWeekday(t, ctx, tx, 1)
	if start != "10:00:00" || end != "18:00:00" || !isOpen {
		t.Errorf("expected working_hours weekday 1 updated to 10:00-18:00 open, got %q-%q open=%v", start, end, isOpen)
	}

	var appliedAt sql.NullTime
	if err := tx.QueryRow(ctx, `SELECT applied_at FROM default_hours_scheduled_changes WHERE id = $1`, changeID).Scan(&appliedAt); err != nil {
		t.Fatalf("failed to read change applied_at: %v", err)
	}
	if !appliedAt.Valid {
		t.Error("expected the scheduled change to be marked applied_at")
	}

	var notifCount int
	if err := tx.QueryRow(ctx, `SELECT COUNT(*) FROM admin_notifications WHERE reason = 'default_hours_changed'`).Scan(&notifCount); err != nil {
		t.Fatalf("failed to count notifications: %v", err)
	}
	if notifCount != 1 {
		t.Errorf("expected 1 default_hours_changed admin notification, got %d", notifCount)
	}
}

// TestApplyScheduledDefaultHours_NoDueChange_Noop verifies the no-op path: with
// no change due (effective_date in the future) the job returns 0 and touches
// nothing.
func TestApplyScheduledDefaultHours_NoDueChange_Noop(t *testing.T) {
	ctx, tx := resetTestData(t)

	tomorrow := LondonDateString(clock.Now().Add(24 * time.Hour))
	seedStagedDefaultHoursChange(t, ctx, tx, tomorrow)

	n, err := ApplyScheduledDefaultHours(ctx)
	if err != nil {
		t.Fatalf("ApplyScheduledDefaultHours failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected 0 applied changes for a future effective_date, got %d", n)
	}

	start, end, isOpen := getWorkingHoursForWeekday(t, ctx, tx, 1)
	if start != "09:00:00" || end != "17:00:00" || !isOpen {
		t.Errorf("expected working_hours untouched, got %q-%q open=%v", start, end, isOpen)
	}
}

// TestApplyScheduledDefaultHours_NotificationFloodCap pins C5 for the
// 'default_hours_changed' insert site: the unacknowledged queue is flood-capped
// at adminnotify.MaxUnacknowledgedCriticalLogs, so the change still applies
// (money/schedule-first) but no notification row is added past the cap.
func TestApplyScheduledDefaultHours_NotificationFloodCap(t *testing.T) {
	ctx, tx := resetTestData(t)

	yesterday := LondonDateString(clock.Now().Add(-24 * time.Hour))
	changeID := seedStagedDefaultHoursChange(t, ctx, tx, yesterday)

	for i := 0; i < adminnotify.MaxUnacknowledgedCriticalLogs; i++ {
		if _, err := tx.Exec(ctx, `
			INSERT INTO admin_notifications (reason, created_at)
			VALUES ('default_hours_changed', NOW())
		`); err != nil {
			t.Fatalf("failed to seed default_hours_changed notification %d: %v", i, err)
		}
	}
	if !adminnotify.CriticalLogsCapExceeded(ctx, tx, "default_hours_changed") {
		t.Fatal("expected the unacknowledged default_hours_changed queue to be at the cap")
	}

	n, err := ApplyScheduledDefaultHours(ctx)
	if err != nil {
		t.Fatalf("ApplyScheduledDefaultHours failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected the change to still apply at the notification cap, got %d", n)
	}

	var appliedAt sql.NullTime
	if err := tx.QueryRow(ctx, `SELECT applied_at FROM default_hours_scheduled_changes WHERE id = $1`, changeID).Scan(&appliedAt); err != nil {
		t.Fatalf("failed to read change applied_at: %v", err)
	}
	if !appliedAt.Valid {
		t.Error("expected the scheduled change to be marked applied_at despite the notification cap")
	}

	var dbCount int
	if err := tx.QueryRow(ctx, `SELECT COUNT(*) FROM admin_notifications WHERE reason = 'default_hours_changed'`).Scan(&dbCount); err != nil {
		t.Fatalf("failed to count notifications: %v", err)
	}
	if dbCount != adminnotify.MaxUnacknowledgedCriticalLogs {
		t.Errorf("expected the queue to stay capped at %d, got %d", adminnotify.MaxUnacknowledgedCriticalLogs, dbCount)
	}
}

// ============================================================
// Multi-row Count Tests
// ============================================================

func TestNotifyUnpaidOneWeek_MultipleBookings(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	user1, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user1: %v", err)
	}
	user2, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user2: %v", err)
	}

	for _, uid := range []string{user1, user2} {
		_, err = tx.Exec(ctx, `
			INSERT INTO bookings (user_id, start_time, status)
			VALUES ($1, $2, 'completed')
		`, uid, clock.Now().Add(-14*24*time.Hour))
		if err != nil {
			t.Fatalf("failed to create booking for %s: %v", uid, err)
		}
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 2 {
		t.Errorf("expected count 2 for 2 unpaid bookings, got %d", n)
	}
}

func TestTransitionDiscountCampaigns_MultipleTransitions(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	// Create one draft (should activate) + one active+expired (should complete)
	_, err := tx.Exec(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 10.0, 'draft', $2, $3)
	`, "Draft Campaign", clock.Now().Add(-1*time.Hour), clock.Now().Add(24*time.Hour))
	if err != nil {
		t.Fatalf("failed to create draft campaign: %v", err)
	}

	_, err = tx.Exec(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 10.0, 'active', $2, $3)
	`, "Expired Active Campaign", clock.Now().Add(-48*time.Hour), clock.Now().Add(-1*time.Hour))
	if err != nil {
		t.Fatalf("failed to create expired active campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 2 {
		t.Errorf("expected count 2 (1 activated + 1 completed), got %d", n)
	}
}

func TestCleanupExpiredVerificationCodes_MultipleCodes(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// 2 expired codes + 1 used old code = 3 deletable + 1 valid = 4 total
	for i := 0; i < 2; i++ {
		_, err = tx.Exec(ctx, `
			INSERT INTO verification_codes (user_id, purpose, code, expires_at)
			VALUES ($1, 'email_verify', $2, $3)
		`, userID, fmt.Sprintf("EXP%04d", i), clock.Now().Add(-1*time.Hour))
		if err != nil {
			t.Fatalf("failed to create expired code: %v", err)
		}
	}

	// One old used code
	_, err = tx.Exec(ctx, `
		INSERT INTO verification_codes (user_id, purpose, code, expires_at, used_at)
		VALUES ($1, 'email_verify', 'USEDEX', $2, $3)
	`, userID, clock.Now().Add(1*time.Hour), clock.Now().Add(-45*24*time.Hour))
	if err != nil {
		t.Fatalf("failed to create used code: %v", err)
	}

	n, err := CleanupExpiredVerificationCodes(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredVerificationCodes failed: %v", err)
	}
	if n != 3 {
		t.Errorf("expected count 3 (2 expired + 1 old used), got %d", n)
	}
}

func TestCleanupExpiredRefreshTokens_MultipleTokens(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// 1 expired
	_, err = tx.Exec(ctx, `
		INSERT INTO refresh_tokens (user_id, token_hash, role, expires_at)
		VALUES ($1, 'exp1', 'test', $2)
	`, userID, clock.Now().Add(-1*time.Hour))
	if err != nil {
		t.Fatalf("failed to create expired token: %v", err)
	}

	// 1 revoked + old
	_, err = tx.Exec(ctx, `
		INSERT INTO refresh_tokens (user_id, token_hash, role, expires_at, revoked, created_at)
		VALUES ($1, 'rev1', 'test', $2, TRUE, $3)
	`, userID, clock.Now().Add(24*time.Hour), clock.Now().Add(-100*24*time.Hour))
	if err != nil {
		t.Fatalf("failed to create revoked token: %v", err)
	}

	n, err := CleanupExpiredRefreshTokens(ctx)
	if err != nil {
		t.Fatalf("CleanupExpiredRefreshTokens failed: %v", err)
	}
	if n != 2 {
		t.Errorf("expected count 2 (1 expired + 1 revoked), got %d", n)
	}
}

// ============================================================
// Gap-Filling Tests for Uncovered Branches
// ============================================================

func TestNotifyUnpaidOneWeek_SkipsCancelled(t *testing.T) {
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// Create a cancelled booking that ended 14 days ago (within the 7-30d window)
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'client_cancelled')
		RETURNING id
	`, userID, clock.Now().Add(-14*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create cancelled booking: %v", err)
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for cancelled booking, got %d", n)
	}
}

func TestNotifyUnpaidOneWeek_SkipsOlderThan30Days(t *testing.T) {
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// Create a booking that ended 45 days ago (outside 7-30 day window)
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-45*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create old booking: %v", err)
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for booking >30 days old, got %d", n)
	}
}

func TestNotifyUnpaidOneWeek_SkipsLessThan7Days(t *testing.T) {
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// Create a booking that ended 3 days ago (less than 7 days)
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-3*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create recent booking: %v", err)
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for booking <7 days old, got %d", n)
	}
}

func TestNotifyUnpaidOneMonth_SkipsCancelled(t *testing.T) {
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'we_cancelled')
		RETURNING id
	`, userID, clock.Now().Add(-45*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create cancelled booking: %v", err)
	}

	n, err := NotifyUnpaidOneMonth(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneMonth failed: %v", err)
	}
	if n != 0 {
		t.Errorf("expected count 0 for cancelled booking, got %d", n)
	}
}

func TestTransitionDiscountCampaigns_OnlyActivated(t *testing.T) {
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 15.0, 'draft', $2, $3)
		RETURNING id
	`, "Draft Only", clock.Now().Add(-1*time.Hour), clock.Now().Add(24*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create draft campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (only activated), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "active" {
		t.Errorf("expected status 'active', got %q", status)
	}
}

func TestTransitionDiscountCampaigns_OnlyCompleted(t *testing.T) {
	ctx, tx := resetTestData(t)

	var campaignID string
	err := tx.QueryRow(ctx, `
		INSERT INTO discount_campaigns (name, campaign_type, discount_percent, status, start_date, end_date)
		VALUES ($1, 'time_based', 20.0, 'active', $2, $3)
		RETURNING id
	`, "Expired Active", clock.Now().Add(-48*time.Hour), clock.Now().Add(-1*time.Hour)).Scan(&campaignID)
	if err != nil {
		t.Fatalf("failed to create expired active campaign: %v", err)
	}

	n, err := TransitionDiscountCampaigns(ctx)
	if err != nil {
		t.Fatalf("TransitionDiscountCampaigns failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected count 1 (only completed), got %d", n)
	}

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM discount_campaigns WHERE id = $1`, campaignID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query campaign status: %v", err)
	}
	if status != "completed" {
		t.Errorf("expected status 'completed', got %q", status)
	}
}

// TestNotifyUnpaidOneWeek_NotificationFloodCap pins C5 for the
// '1_week_no_pay' insert site: the unacknowledged queue is flood-capped at
// adminnotify.MaxUnacknowledgedCriticalLogs, so a runaway unpaid-booking
// cleanup cannot bury the operator's notification centre. At the cap further
// inserts are suppressed and the queue stays bounded.
func TestNotifyUnpaidOneWeek_NotificationFloodCap(t *testing.T) {
	t.Parallel()
	ctx, tx := resetTestData(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'completed')
		RETURNING id
	`, userID, clock.Now().Add(-14*24*time.Hour)).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}

	// Fill the unacknowledged '1_week_no_pay' queue to the cap before the
	// cleanup runs, so the insert site must suppress instead of growing it.
	for i := 0; i < adminnotify.MaxUnacknowledgedCriticalLogs; i++ {
		if _, err := tx.Exec(ctx, `
			INSERT INTO admin_notifications (reason, user_id, created_at)
			VALUES ('1_week_no_pay', $1, NOW())
		`, userID); err != nil {
			t.Fatalf("failed to seed 1_week_no_pay notification %d: %v", i, err)
		}
	}
	if !adminnotify.CriticalLogsCapExceeded(ctx, tx, "1_week_no_pay") {
		t.Fatal("expected the unacknowledged 1_week_no_pay queue to be at the cap")
	}

	n, err := NotifyUnpaidOneWeek(ctx)
	if err != nil {
		t.Fatalf("NotifyUnpaidOneWeek failed: %v", err)
	}
	if n != 1 {
		t.Errorf("expected candidate count 1, got %d", n)
	}

	var dbCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM admin_notifications WHERE reason = '1_week_no_pay'`).Scan(&dbCount)
	if err != nil {
		t.Fatalf("failed to query notification count: %v", err)
	}
	if dbCount != adminnotify.MaxUnacknowledgedCriticalLogs {
		t.Errorf("expected the queue to stay capped at %d, got %d", adminnotify.MaxUnacknowledgedCriticalLogs, dbCount)
	}
}