package radarfetch

import (
	"strconv"
	"strings"
	"time"
)

// ParseNmcTime parses like "MM/DD HH:MM" with a local tz offset (hours).
func ParseNmcTime(s string, tzOffset int) (date int, hour int, minute int, tsLocal string) {
	parts := strings.Fields(s)
	if len(parts) >= 2 {
		md := strings.Split(parts[0], "/")
		hm := strings.Split(parts[1], ":")
		if len(md) == 2 && len(hm) == 2 {
			now := time.Now().UTC().Add(time.Duration(tzOffset) * time.Hour)
			y := now.Year()
			m, _ := strconv.Atoi(md[0])
			d, _ := strconv.Atoi(md[1])
			h, _ := strconv.Atoi(hm[0])
			mm, _ := strconv.Atoi(hm[1])
			loc := time.FixedZone("LOCAL", tzOffset*3600)
			t := time.Date(y, time.Month(m), d, h, mm, 0, 0, loc)
			date = t.Year()*10000 + int(t.Month())*100 + t.Day()
			hour = t.Hour()
			minute = t.Minute()
			tsLocal = t.Format("2006-01-02 15:04:05")
			return
		}
	}
	now := time.Now().UTC().Add(time.Duration(tzOffset) * time.Hour)
	date = now.Year()*10000 + int(now.Month())*100 + now.Day()
	hour = now.Hour()
	minute = now.Minute()
	tsLocal = now.Format("2006-01-02 15:04:05")
	return
}