package promo_rule

import (
	"database/sql/driver"
	"encoding/json"
	"time"

	"gorm.io/gorm"
)

type JSONRawMessage json.RawMessage

func (j *JSONRawMessage) Scan(value interface{}) error {
	if value == nil {
		*j = JSONRawMessage([]byte("{}"))
		return nil
	}

	switch v := value.(type) {
	case []byte:
		*j = JSONRawMessage(v)
	case string:
		*j = JSONRawMessage([]byte(v))
	default:
		*j = JSONRawMessage([]byte("{}"))
	}
	return nil
}

func (j JSONRawMessage) Value() (driver.Value, error) {
	if len(j) == 0 {
		return "{}", nil
	}
	data, err := json.RawMessage(j).MarshalJSON()
	if err != nil {
		return nil, err
	}
	return string(data), nil
}

func (j JSONRawMessage) MarshalJSON() ([]byte, error) {
	if len(j) == 0 {
		return []byte("{}"), nil
	}
	return json.RawMessage(j).MarshalJSON()
}

func (j *JSONRawMessage) UnmarshalJSON(data []byte) error {
	if len(data) == 0 {
		*j = JSONRawMessage([]byte("{}"))
		return nil
	}
	*j = JSONRawMessage(data)
	return nil
}

type PromoRule struct {
	Id        int64          `gorm:"type:bigint unsigned;primaryKey"`
	Name      string         `gorm:"type:varchar(100);not null;default:'';comment:Rule Name"`
	Type      string         `gorm:"type:varchar(32);not null;default:'';comment:Rule Type: new_user, inactive_user, campaign"`
	Params    JSONRawMessage `gorm:"type:json;not null;comment:Rule Params"`
	Priority  int64          `gorm:"type:int;not null;default:0;index:idx_enabled_priority,priority:2,sort:desc;comment:Priority"`
	Enabled   bool           `gorm:"type:tinyint(1);not null;default:1;index:idx_enabled_priority,priority:1;comment:Enabled"`
	StartTime *time.Time     `gorm:"type:datetime;default:null;comment:Start Time"`
	EndTime   *time.Time     `gorm:"type:datetime;default:null;comment:End Time"`
	CreatedAt time.Time      `gorm:"<-:create;comment:Create Time"`
	UpdatedAt time.Time      `gorm:"comment:Update Time"`
	DeletedAt gorm.DeletedAt `gorm:"index;comment:Delete Time"`
}

func (PromoRule) TableName() string {
	return "promo_rule"
}