package base_model

import (
	"fmt"
	"encoding/json"
	"database/sql/driver"
)

type StringArray []string

func (s StringArray) Value() (driver.Value, error) {
	if len(s) == 0 {
		return "[]", nil // empty array
	}
	return json.Marshal(s)
}

func (s *StringArray) Scan(value interface{}) error {
	if value == nil {
		*s = StringArray{}
		return nil
	}

	var bytes []byte
	switch v := value.(type) {
	case []byte:
		bytes = v
	case string:
		bytes = []byte(v)
	default:
		return fmt.Errorf("unsupported type: %T", value)
	}

	if len(bytes) == 0 {
		*s = StringArray{}
		return nil
	}

	if string(bytes) == "[]" {
		*s = StringArray{}
		return nil
	}

	return json.Unmarshal(bytes, s)
}