package service

import (
	"fmt"
	"github.com/spf13/viper"
	envUtil "houston/common/util/env"
	"strconv"
	"strings"
	"unicode"
)

func getBotNameFromEnv() string {
	env := viper.GetString("env")
	appName := viper.GetString(envUtil.APP_NAME)
	if env == "prod" {
		if appName == envUtil.QA_APP_NAME {
			return "qa-tracker"
		}
		return "houston"
	} else if env == "qa" {
		if appName == envUtil.QA_APP_NAME {
			return "np-qa-tracker"
		}
		return "test-issue"
	}

	return "dev-issue"
}

func getTruncatedTitle(title string) string {
	builder := strings.Builder{}
	truncatedTitleLengthLimit := viper.GetInt("TRUNCATED_TITLE_LENGTH_LIMIT")

	for _, char := range title {
		if len(builder.String()) >= truncatedTitleLengthLimit {
			break
		}
		if unicode.IsLetter(char) {
			builder.WriteRune(unicode.ToLower(char))
		} else if unicode.IsDigit(char) || char == '-' {
			builder.WriteRune(char)
		} else if unicode.IsSpace(char) {
			builder.WriteRune('-')
		}
	}

	return builder.String()
}

func ConstructIncidentChannelName(incidentId uint, severityId uint, status string, title string) string {
	var severityStatusPrefix string
	var channelPrefix = "_"
	switch status {
	case "Investigating", "Identified":
		severityStatusPrefix = "i"
	case "Monitoring":
		severityStatusPrefix = "m"
	case "Resolved":
		severityStatusPrefix = "r"
	case "Duplicated":
		severityStatusPrefix = "rd"
	}
	return fmt.Sprintf(
		"%s%s%d-%s-%s-%s",
		channelPrefix, severityStatusPrefix, severityId-1,
		strconv.Itoa(int(incidentId)), getBotNameFromEnv(), getTruncatedTitle(title),
	)
}