package models

// LevelOneAccountParentId represents the parent id of level-one account
const LevelOneAccountParentId = 0

// AccountCategory represents account category
type AccountCategory byte

// Account categories
const (
	ACCOUNT_CATEGORY_CASH        AccountCategory = 1
	ACCOUNT_CATEGORY_DEBIT_CARD  AccountCategory = 2
	ACCOUNT_CATEGORY_CREDIT_CARD AccountCategory = 3
	ACCOUNT_CATEGORY_VIRTUAL     AccountCategory = 4
	ACCOUNT_CATEGORY_DEBT        AccountCategory = 5
	ACCOUNT_CATEGORY_RECEIVABLES AccountCategory = 6
	ACCOUNT_CATEGORY_INVESTMENT  AccountCategory = 7
)

var assetAccountCategory = map[AccountCategory]bool{
	ACCOUNT_CATEGORY_CASH:        true,
	ACCOUNT_CATEGORY_DEBIT_CARD:  true,
	ACCOUNT_CATEGORY_CREDIT_CARD: false,
	ACCOUNT_CATEGORY_VIRTUAL:     true,
	ACCOUNT_CATEGORY_DEBT:        false,
	ACCOUNT_CATEGORY_RECEIVABLES: true,
	ACCOUNT_CATEGORY_INVESTMENT:  true,
}

var liabilityAccountCategory = map[AccountCategory]bool{
	ACCOUNT_CATEGORY_CASH:        false,
	ACCOUNT_CATEGORY_DEBIT_CARD:  false,
	ACCOUNT_CATEGORY_CREDIT_CARD: true,
	ACCOUNT_CATEGORY_VIRTUAL:     false,
	ACCOUNT_CATEGORY_DEBT:        true,
	ACCOUNT_CATEGORY_RECEIVABLES: false,
	ACCOUNT_CATEGORY_INVESTMENT:  false,
}

// AccountType represents account type
type AccountType byte

// Account types
const (
	ACCOUNT_TYPE_SINGLE_ACCOUNT     AccountType = 1
	ACCOUNT_TYPE_MULTI_SUB_ACCOUNTS AccountType = 2
)

// Account represents account data stored in database
type Account struct {
	AccountId       int64           `xorm:"PK"`
	Uid             int64           `xorm:"INDEX(IDX_account_uid_deleted_parent_account_id_order) NOT NULL"`
	Deleted         bool            `xorm:"INDEX(IDX_account_uid_deleted_parent_account_id_order) NOT NULL"`
	Category        AccountCategory `xorm:"NOT NULL"`
	Type            AccountType     `xorm:"NOT NULL"`
	ParentAccountId int64           `xorm:"INDEX(IDX_account_uid_deleted_parent_account_id_order) NOT NULL"`
	Name            string          `xorm:"VARCHAR(32) NOT NULL"`
	DisplayOrder    int32           `xorm:"INDEX(IDX_account_uid_deleted_parent_account_id_order) NOT NULL"`
	Icon            int64           `xorm:"NOT NULL"`
	Color           string          `xorm:"VARCHAR(6) NOT NULL"`
	Currency        string          `xorm:"VARCHAR(3) NOT NULL"`
	Balance         int64           `xorm:"NOT NULL"`
	Comment         string          `xorm:"VARCHAR(255) NOT NULL"`
	Hidden          bool            `xorm:"NOT NULL"`
	CreatedUnixTime int64
	UpdatedUnixTime int64
	DeletedUnixTime int64
}

// AccountCreateRequest represents all parameters of account creation request
type AccountCreateRequest struct {
	Name            string                  `json:"name" binding:"required,notBlank,max=32"`
	Category        AccountCategory         `json:"category" binding:"required"`
	Type            AccountType             `json:"type" binding:"required"`
	Icon            int64                   `json:"icon,string" binding:"required,min=1"`
	Color           string                  `json:"color" binding:"required,len=6,validHexRGBColor"`
	Currency        string                  `json:"currency" binding:"required,len=3,validCurrency"`
	Balance         int64                   `json:"balance"`
	Comment         string                  `json:"comment" binding:"max=255"`
	SubAccounts     []*AccountCreateRequest `json:"subAccounts" binding:"omitempty"`
	ClientSessionId string                  `json:"clientSessionId"`
}

// AccountModifyRequest represents all parameters of account modification request
type AccountModifyRequest struct {
	Id          int64                   `json:"id,string" binding:"required,min=1"`
	Name        string                  `json:"name" binding:"required,notBlank,max=32"`
	Category    AccountCategory         `json:"category" binding:"required"`
	Icon        int64                   `json:"icon,string" binding:"min=1"`
	Color       string                  `json:"color" binding:"required,len=6,validHexRGBColor"`
	Comment     string                  `json:"comment" binding:"max=255"`
	Hidden      bool                    `json:"hidden"`
	SubAccounts []*AccountModifyRequest `json:"subAccounts" binding:"omitempty"`
}

// AccountListRequest represents all parameters of account listing request
type AccountListRequest struct {
	VisibleOnly bool `form:"visible_only"`
}

// AccountGetRequest represents all parameters of account getting request
type AccountGetRequest struct {
	Id int64 `form:"id,string" binding:"required,min=1"`
}

// AccountHideRequest represents all parameters of account hiding request
type AccountHideRequest struct {
	Id     int64 `json:"id,string" binding:"required,min=1"`
	Hidden bool  `json:"hidden"`
}

// AccountMoveRequest represents all parameters of account moving request
type AccountMoveRequest struct {
	NewDisplayOrders []*AccountNewDisplayOrderRequest `json:"newDisplayOrders" binding:"required,min=1"`
}

// AccountNewDisplayOrderRequest represents a data pair of id and display order
type AccountNewDisplayOrderRequest struct {
	Id           int64 `json:"id,string" binding:"required,min=1"`
	DisplayOrder int32 `json:"displayOrder"`
}

// AccountDeleteRequest represents all parameters of account deleting request
type AccountDeleteRequest struct {
	Id int64 `json:"id,string" binding:"required,min=1"`
}

// AccountInfoResponse represents a view-object of account
type AccountInfoResponse struct {
	Id           int64                    `json:"id,string"`
	Name         string                   `json:"name"`
	ParentId     int64                    `json:"parentId,string"`
	Category     AccountCategory          `json:"category"`
	Type         AccountType              `json:"type"`
	Icon         int64                    `json:"icon,string"`
	Color        string                   `json:"color"`
	Currency     string                   `json:"currency"`
	Balance      int64                    `json:"balance"`
	Comment      string                   `json:"comment"`
	DisplayOrder int32                    `json:"displayOrder"`
	IsAsset      bool                     `json:"isAsset,omitempty"`
	IsLiability  bool                     `json:"isLiability,omitempty"`
	Hidden       bool                     `json:"hidden"`
	SubAccounts  AccountInfoResponseSlice `json:"subAccounts,omitempty"`
}

// ToAccountInfoResponse returns a view-object according to database model
func (a *Account) ToAccountInfoResponse() *AccountInfoResponse {
	return &AccountInfoResponse{
		Id:           a.AccountId,
		Name:         a.Name,
		ParentId:     a.ParentAccountId,
		Category:     a.Category,
		Type:         a.Type,
		Icon:         a.Icon,
		Color:        a.Color,
		Currency:     a.Currency,
		Balance:      a.Balance,
		Comment:      a.Comment,
		DisplayOrder: a.DisplayOrder,
		IsAsset:      assetAccountCategory[a.Category],
		IsLiability:  liabilityAccountCategory[a.Category],
		Hidden:       a.Hidden,
	}
}

// AccountInfoResponseSlice represents the slice data structure of AccountInfoResponse
type AccountInfoResponseSlice []*AccountInfoResponse

// Len returns the count of items
func (a AccountInfoResponseSlice) Len() int {
	return len(a)
}

// Swap swaps two items
func (a AccountInfoResponseSlice) Swap(i, j int) {
	a[i], a[j] = a[j], a[i]
}

// Less reports whether the first item is less than the second one
func (a AccountInfoResponseSlice) Less(i, j int) bool {
	if a[i].Category != a[j].Category {
		return a[i].Category < a[j].Category
	}

	return a[i].DisplayOrder < a[j].DisplayOrder
}