package pkg

import (
	"regexp"
	"strings"
)

var (
	LtmLog = regexp.MustCompile(`([^\s]+[\s]+[\d]+)[\s]((?:[\d]{2}:){2}[\d]{2})[\s]([^\s]+)[\s]([^\s]+)[\s]([^\s]+):[\s](.*)`)
)

// LtmLogLine type is a parsed representation of a log line from the ltm logs.
//
// Example log line: "Feb  2 04:02:03 10000 info audit_forwarder: audit_forwarder started."
// Example struct: {Date: "Feb  2:, Time: "04:02:03", MessageCode: "10000", Level: "info", Service: "audit_forwarder:", Message: "audit_forwarder started."}
type LtmLogLine struct {
	Date        string `json:"date"`
	Time        string `json:"time"`
	Level       string `json:"level"`
	Service     string `json:"service"`
	MessageCode string `json:"message_code"`
	Message     string `json:"message"`
}

// ParseLtmLog method returns a slice of parsed log lines from both the current ltm and zipped ltm logs.
//
// Should the log message not fall into the expected log pattern the entire log line will appear un-parsed in the message field of the LtmLogLine struct
// all other fields will be nil.
func ParseLtmLog(log string) (ltmLog []LtmLogLine) {
	for _, i := range strings.Split(log, "\n") {
		match := LtmLog.FindStringSubmatch(i)
		if len(match) == 0 {
			ltmLog = append(ltmLog, LtmLogLine{Message: i})
		} else {
			ltmLog = append(ltmLog, LtmLogLine{Date: match[1], Time: match[2], MessageCode: match[3], Level: match[4], Service: match[5], Message: match[6]})
		}
	}
	return
}