package sim

import "strings"

// simWords is the word pool the fake output is drawn from.
var simWords = []string{
	"alpha", "beta", "gamma", "delta", "epsilon", "zeta", "eta", "theta",
	"iota", "kappa", "lambda", "mu", "nu", "xi", "omicron", "pi",
}

// tokenText returns the text of the n-th generated token (n starts at 1).
// It must be deterministic: the text written into the cache on completion has
// to match exactly what was streamed to the client.
func tokenText(n int) string {
	return " " + simWords[(n-1)%len(simWords)]
}

// generatedText returns the concatenation of the first n tokens.
func generatedText(n int) string {
	var b strings.Builder
	b.Grow(n * 7)
	for i := 1; i <= n; i++ {
		b.WriteString(tokenText(i))
	}
	return b.String()
}