package services

import (
	"strings"
	"testing"

	"lokistack/models"
)

// 预置 positions 的脚本必须：只补缺失路径、用文件大小做偏移、
// 已有记录不覆盖（重装不重复采集）。
func TestSeedPositionsCmd(t *testing.T) {
	cmd := seedPositionsCmd([]string{"/var/log/messages", "/var/log/*.log", "/var/log/messages"})
	for _, want := range []string{
		"positions:", "/var/lib/promtail/positions.yaml",
		"grep -qF", "stat -c %s", "/var/log/messages", "/var/log/*.log",
	} {
		if !strings.Contains(cmd, want) {
			t.Fatalf("脚本缺少 %q：\n%s", want, cmd)
		}
	}
	// 去重：同一路径只出现一次
	if strings.Count(cmd, "'/var/log/messages'") != 1 {
		t.Fatalf("路径未去重：\n%s", cmd)
	}
	if seedPositionsCmd(nil) != "" {
		t.Fatal("无路径时应返回空串")
	}
}

// 采集器涉及的路径要覆盖：系统日志 + logPath + 每个 job 的路径
func TestCollectorPositionPatterns(t *testing.T) {
	c := &models.Collector{
		LogPath: "/data/app/*.log",
		ScrapeJobs: []models.ScrapeJob{
			{Name: "a", Paths: []string{"/data/a/*.log"}},
			{Name: "system", System: true}, // 无显式路径 → 用探测结果
		},
	}
	got := strings.Join(collectorPositionPatterns(c, []string{"/var/log/messages"}), ",")
	for _, want := range []string{"/var/log/messages", "/data/app/*.log", "/data/a/*.log"} {
		if !strings.Contains(got, want) {
			t.Fatalf("缺少路径 %s，实际：%s", want, got)
		}
	}
}