package keygen

import "testing"

func TestTokenProperties(t *testing.T) {
	seen := map[string]int{}
	for vid := 1; vid <= 5000; vid++ {
		tok := GenerateKey(vid)
		if len(tok) != 30 {
			t.Fatalf("vid %d: len %d, want 30", vid, len(tok))
		}
		for _, ch := range tok {
			if !((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch >= '0' && ch <= '9')) {
				t.Fatalf("vid %d: bad char %q", vid, ch)
			}
		}
		if prev, dup := seen[tok]; dup {
			t.Fatalf("COLLISION: vid %d and vid %d share a token", prev, vid)
		}
		seen[tok] = vid
		if !ValidateKey(tok, vid) {
			t.Fatalf("vid %d: own token rejected", vid)
		}
		if ValidateKey(tok, vid+1) || ValidateKey(tok, vid+62) {
			t.Fatalf("vid %d: token accepted for another video", vid)
		}
	}
	t.Logf("5000 ids -> %d distinct tokens (legacy gave 62)", len(seen))
	for _, bad := range []string{"", "aaaa", GenerateKey(1)[:29], GenerateKey(1) + "x"} {
		if ValidateKey(bad, 1) {
			t.Fatalf("garbage token %q accepted", bad)
		}
	}
}