package ratelimit_test

import (
	"testing"

	"scrabble/gateway/internal/ratelimit"
)

// TestTrackerDrain verifies rejections aggregate per (class, key) and that a
// drain resets the tracker.
func TestTrackerDrain(t *testing.T) {
	tr := ratelimit.NewTracker()
	if got := tr.Drain(); got != nil {
		t.Fatalf("empty tracker drained %v, want nil", got)
	}

	tr.Add("user", "u-1")
	tr.Add("user", "u-1")
	tr.Add("public", "10.0.0.1")

	got := map[string]ratelimit.Rejection{}
	for _, r := range tr.Drain() {
		got[r.Class+"/"+r.Key] = r
	}
	if len(got) != 2 {
		t.Fatalf("drained %d entries, want 2", len(got))
	}
	if r := got["user/u-1"]; r.Rejected != 2 {
		t.Errorf("user/u-1 rejected = %d, want 2", r.Rejected)
	}
	if r := got["public/10.0.0.1"]; r.Rejected != 1 {
		t.Errorf("public/10.0.0.1 rejected = %d, want 1", r.Rejected)
	}

	if got := tr.Drain(); got != nil {
		t.Fatalf("second drain = %v, want nil", got)
	}
}