//go:build test

package adminnotify

import (
	"context"
	"os"
	"testing"

	"crussell/db"
	"crussell/testutils/testdb"
)

func TestMain(m *testing.M) {
	pool := testdb.CreateTestDatabase("crussell_test_adminnotify")
	db.Conn = db.NewPoolProxy(pool)
	code := m.Run()
	testdb.DestroyTestDatabase(pool, "crussell_test_adminnotify")
	os.Exit(code)
}

// TestMaxUnacknowledgedCriticalLogs_Value pins the exported flood-cap constant
// that every capped insert site folds into its SQL (changing it re-scopes every
// site at once, so the value is part of the shared contract).
func TestMaxUnacknowledgedCriticalLogs_Value(t *testing.T) {
	if MaxUnacknowledgedCriticalLogs != 100 {
		t.Errorf("expected MaxUnacknowledgedCriticalLogs to be 100, got %d", MaxUnacknowledgedCriticalLogs)
	}
}

// TestCriticalLogsCapExceeded verifies the exported pre-check that logs a
// suppression: below the cap it reports false, at the cap true, and
// acknowledging rows re-arms it.
func TestCriticalLogsCapExceeded(t *testing.T) {
	ctx := context.Background()
	t.Cleanup(func() {
		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notification_suppressions WHERE reason = 'critical_payment_log'")
	})

	if CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
		t.Fatal("expected the empty queue to be below the cap")
	}

	for i := 0; i < MaxUnacknowledgedCriticalLogs-1; i++ {
		if _, err := db.Conn.Exec(ctx, `
			INSERT INTO admin_notifications (reason, created_at)
			VALUES ('critical_payment_log', NOW())
		`); err != nil {
			t.Fatalf("failed to insert row %d: %v", i, err)
		}
	}
	if CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
		t.Fatalf("expected %d unacknowledged rows to stay below the cap", MaxUnacknowledgedCriticalLogs-1)
	}

	if _, err := db.Conn.Exec(ctx, `
		INSERT INTO admin_notifications (reason, created_at)
		VALUES ('critical_payment_log', NOW())
	`); err != nil {
		t.Fatalf("failed to insert the cap row: %v", err)
	}
	if !CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
		t.Fatalf("expected %d unacknowledged rows to be at the cap", MaxUnacknowledgedCriticalLogs)
	}

	if _, err := db.Conn.Exec(ctx, "UPDATE admin_notifications SET acknowledged_at = NOW() WHERE reason = 'critical_payment_log'"); err != nil {
		t.Fatalf("failed to acknowledge the queue: %v", err)
	}
	if CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
		t.Fatal("expected acknowledging the queue to re-arm inserts")
	}
}

// TestCriticalLogsCapExceeded_RecordsSuppression pins FIX 3a: hitting the
// flood cap records the suppression in admin_notification_suppressions (the
// operator-facing "suppressed this cycle" counter) with a running count, and
// ActiveSuppressions reports it only while the underlying queue is still at the
// cap — acknowledging the queue down resets the visible count.
func TestCriticalLogsCapExceeded_RecordsSuppression(t *testing.T) {
	ctx := context.Background()
	t.Cleanup(func() {
		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notification_suppressions WHERE reason = 'critical_payment_log'")
	})

	// Below the cap no suppression is recorded.
	for i := 0; i < MaxUnacknowledgedCriticalLogs-1; i++ {
		if _, err := db.Conn.Exec(ctx, `
			INSERT INTO admin_notifications (reason, created_at)
			VALUES ('critical_payment_log', NOW())
		`); err != nil {
			t.Fatalf("failed to insert row %d: %v", i, err)
		}
	}
	if supps, err := ActiveSuppressions(ctx, db.Conn); err != nil {
		t.Fatalf("ActiveSuppressions failed below the cap: %v", err)
	} else if len(supps) != 0 {
		t.Fatalf("expected no suppression below the cap, got %d", len(supps))
	}

	// Fill to the cap, then hit it twice: each suppressed alert is recorded.
	if _, err := db.Conn.Exec(ctx, `
		INSERT INTO admin_notifications (reason, created_at)
		VALUES ('critical_payment_log', NOW())
	`); err != nil {
		t.Fatalf("failed to insert the cap row: %v", err)
	}
	if !CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
		t.Fatal("expected the queue to be at the cap")
	}
	if !CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
		t.Fatal("expected the queue to stay at the cap")
	}

	supps, err := ActiveSuppressions(ctx, db.Conn)
	if err != nil {
		t.Fatalf("ActiveSuppressions failed: %v", err)
	}
	if len(supps) != 1 {
		t.Fatalf("expected exactly 1 suppression record, got %d", len(supps))
	}
	if supps[0].Reason != "critical_payment_log" {
		t.Errorf("expected reason critical_payment_log, got %s", supps[0].Reason)
	}
	if supps[0].SuppressedCount != 2 {
		t.Errorf("expected suppressed_count 2, got %d", supps[0].SuppressedCount)
	}

	// Acknowledging the queue below the cap makes the suppression inactive, so
	// the "this cycle" count resets.
	if _, err := db.Conn.Exec(ctx, "UPDATE admin_notifications SET acknowledged_at = NOW() WHERE reason = 'critical_payment_log'"); err != nil {
		t.Fatalf("failed to acknowledge the queue: %v", err)
	}
	supps, err = ActiveSuppressions(ctx, db.Conn)
	if err != nil {
		t.Fatalf("ActiveSuppressions failed after acknowledge: %v", err)
	}
	if len(supps) != 0 {
		t.Errorf("expected the suppression to reset once the queue is below the cap, got %d", len(supps))
	}
}