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"`

	Timestamp time.Time
	Note      string

	// account id is only nil, if the transaction is a deposit to a treasure chest
	AccountId       *uuid.UUID `db:"account_id"`
	TreasureChestId *uuid.UUID `db:"treasure_chest_id"`
	// The value of the transacion. Negative for outgoing and positive for incoming transactions.
	Value int64

	// If an error is present, then the transaction is not valid and should not be used for calculations.
	Error     *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"`
}

type TransactionInput struct {
	Id                    string
	AccountId             string
	TreasureChestId       string
	Value                 string
	Timestamp             string
	TimezoneOffsetMinutes string
	Note                  string
}