package types

import (
	"time"

	"github.com/google/uuid"
)

// At the center of the application is the transaction.
//
// Every piece of data should be calculated based on transactions.
// This means potential calculation errors can be fixed later in time.
//
// If it becomes necessary to precalculate snapshots for performance reasons, this can be done in the future.
// But the transaction should always be the source of truth.
type Transaction struct {
	Id     uuid.UUID
	UserId uuid.UUID `db:"user_id"`

	AccountId uuid.UUID `db:"account_id"`
	// nil indicates that the transaction is not yet associated with a piggy bank
	TreasureChestId *uuid.UUID `db:"treasure_chest_id"`

	// The internal transaction is amove between e.g. an account and a piggy bank to execute a savings plan
	Internal bool

	// The value of the transacion. Negative for outgoing and positive for incoming
	Value     int64
	Timestamp time.Time

	Note string

	CreatedAt time.Time  `db:"created_at"`
	CreatedBy uuid.UUID  `db:"created_by"`
	UpdatedAt *time.Time `db:"updated_at"`
	UpdatedBy *uuid.UUID `db:"updated_by"`
}