package helpers

import (
	"fmt"
	"time"
)

var drawDateLayouts = []string{
	time.RFC3339,          // 2006-01-02T15:04:05Z07:00
	"2006-01-02",          // 2025-10-29
	"2006-01-02 15:04",    // 2025-10-29 20:30
	"2006-01-02 15:04:05", // 2025-10-29 20:30:59
}

// ParseDrawDate tries multiple layouts and returns UTC.
func ParseDrawDate(s string) (time.Time, error) {
	for _, l := range drawDateLayouts {
		if t, err := time.ParseInLocation(l, s, time.Local); err == nil {
			return t.UTC(), nil
		}
	}
	return time.Time{}, fmt.Errorf("cannot parse draw date: %q", s)
}

// FormatDrawDate normalizes a time to the storage format you use in SQL (date only).
func FormatDrawDate(t time.Time) string {
	if t.IsZero() {
		return ""
	}
	return t.UTC().Format("2006-01-02")
}