package webhook

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/hex"
	"testing"
)

func TestVerifySignatureUsesRawBodyAndPrefix(t *testing.T) {
	body := []byte(`{"ok":true}`)
	mac := hmac.New(sha256.New, []byte("secret"))
	_, _ = mac.Write(body)
	signature := hex.EncodeToString(mac.Sum(nil))
	if !VerifySignature(body, "secret", "sha256="+signature) {
		t.Fatal("valid signature was rejected")
	}
	if VerifySignature([]byte(`{"ok":false}`), "secret", signature) {
		t.Fatal("changed body was accepted")
	}
	if VerifySignature(body, "wrong", signature) {
		t.Fatal("wrong secret was accepted")
	}
}

func TestParseEvents(t *testing.T) {
	body := []byte(`{"repository":{"full_name":"acme/repo"},"sender":{"username":"alice"},"comment":{"id":11,"body":"@codex review"},"issue":{"number":9,"pull_request":{"url":"x"}},"pull_request":{"head":{"sha":"abc"}}}`)
	event, err := ParseEvent("issue_comment", "delivery-1", body)
	if err != nil {
		t.Fatal(err)
	}
	if event.Repo != "acme/repo" || event.PRNumber != 9 || event.HeadSHA != "abc" || event.CommentID != 11 {
		t.Fatalf("unexpected event: %#v", event)
	}
	bad := []byte(`{"repository":{"full_name":"acme/repo"},"comment":{"id":1},"issue":{"number":9}}`)
	if _, err := ParseEvent("issue_comment", "", bad); err == nil {
		t.Fatal("non-PR issue comment was accepted")
	}
}