package customer

import (
	"time"

	"github.com/asaskevich/govalidator"
)

// init registers custom validators
func init() {
	// Register custom validators
	govalidator.CustomTypeTagMap.Set("unix_timestamp", govalidator.CustomTypeValidator(func(i interface{}, context interface{}) bool {
		switch v := i.(type) {
		case int64:
			// Check if timestamp is reasonable (not too old, not in the future)
			now := time.Now().Unix()
			minTimestamp := now - (100 * 365 * 24 * 60 * 60) // 100 years ago
			maxTimestamp := now + (10 * 365 * 24 * 60 * 60)  // 10 years in future
			return v >= minTimestamp && v <= maxTimestamp
		case *int64:
			if v == nil {
				return true // nil is valid for optional fields
			}
			now := time.Now().Unix()
			minTimestamp := now - (100 * 365 * 24 * 60 * 60) // 100 years ago
			maxTimestamp := now + (10 * 365 * 24 * 60 * 60)  // 10 years in future
			return *v >= minTimestamp && *v <= maxTimestamp
		default:
			return false
		}
	}))
}