package config

import (
	"net/url"
	"os"
	"strings"
	"testing"

	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/notifier"
)

func TestMain(m *testing.M) {
	u, _ := url.Parse("https://victoriametrics.com/path")
	notifier.InitTemplateFunc(u)
	os.Exit(m.Run())
}

func TestParseGood(t *testing.T) {
	if _, err := Parse([]string{"testdata/*good.rules", "testdata/dir/*good.*"}, true); err != nil {
		t.Errorf("error parsing files %s", err)
	}
}

func TestParseBad(t *testing.T) {
	testCases := []struct {
		path   []string
		expErr string
	}{
		{
			[]string{"testdata/rules0-bad.rules"},
			"unexpected token",
		},
		{
			[]string{"testdata/dir/rules0-bad.rules"},
			"error parsing annotation",
		},
		{
			[]string{"testdata/dir/rules1-bad.rules"},
			"duplicate in file",
		},
		{
			[]string{"testdata/dir/rules2-bad.rules"},
			"function \"value\" not defined",
		},
		{
			[]string{"testdata/dir/rules3-bad.rules"},
			"either `record` or `alert` must be set",
		},
		{
			[]string{"testdata/dir/rules4-bad.rules"},
			"either `record` or `alert` must be set",
		},
		{
			[]string{"testdata/*.yaml"},
			"no groups found",
		},
	}
	for _, tc := range testCases {
		_, err := Parse(tc.path, true)
		if err == nil {
			t.Errorf("expected to get error")
			return
		}
		if !strings.Contains(err.Error(), tc.expErr) {
			t.Errorf("expected err to contain %q; got %q instead", tc.expErr, err)
		}
	}
}

func TestRule_Validate(t *testing.T) {
	if err := (&Rule{}).Validate(); err == nil {
		t.Errorf("exptected empty name error")
	}
	if err := (&Rule{Alert: "alert"}).Validate(); err == nil {
		t.Errorf("exptected empty expr error")
	}
	if err := (&Rule{Alert: "alert", Expr: "test{"}).Validate(); err == nil {
		t.Errorf("exptected invalid expr error")
	}
	if err := (&Rule{Alert: "alert", Expr: "test>0"}).Validate(); err != nil {
		t.Errorf("exptected valid rule got %s", err)
	}
}