package core

import "github.com/shopspring/decimal"

type User struct {
	Username   string   `gorm:"primaryKey" json:"username"`
	Password   string   `json:"password"`
	OwnedPlans []Plan   `gorm:"foreignKey:Owner;references:Username" json:"-"`
	MemberOf   []Member `json:"-"`
	Votes      []Vote   `gorm:"foreignKey:UsernameID" json:"-"`
}

type Member struct {
	ID     uint   `gorm:"primaryKey;autoIncrement:true" json:"-"`
	PlanID uint   `json:"-"`
	Plan   Plan   `json:"-"`
	Name   string `gorm:"check:user_id IS NOT NULL OR name IS NOT NULL" json:"name,omitempty"`
	UserID string `json:"username,omitempty"`
	User   User   `gorm:"foreignKey:UserID" json:"-"`
}

// CREATE TABLE plans(id INTEGER PRIMARY KEY AUTOINCREMENT, name STRING, owner STRING, FOREIGN KEY(owner) REFERENCES users(username))
// CREATE TABLE plan_user_relations(username STRING, plan INTEGER, PRIMARY KEY(username, plan), FOREIGN KEY username REFERENCES user(username), FOREIGN KEY plan REFERENCES plans(id))
type Plan struct {
	ID          uint     `gorm:"primaryKey;autoIncrement:true" json:"id"`
	Name        string   `json:"name"`
	Owner       string   `json:"owner"`
	Description string   `json:"description"`
	JoinCode    string   `gorm:"not null" json:"join_code,omitempty"`
	Members     []Member `json:"-"`
	Polls       []Poll   `gorm:"foreignKey:PlanID;references:ID" json:"-"`
}

type Expense struct {
	ID      uint            `gorm:"primaryKey;autoIncrement:true" json:"id"`
	PlanID  uint            `json:"-"`
	Plan    Plan            `json:"-"`
	PayerID uint            `json:"-"`
	Payer   Member          `gorm:"foreignKey:PayerID" json:"-"`
	Amount  decimal.Decimal `json:"amount"`
	Debts   []Debt          `gorm:"foreignKey:ExpenseID" json:"debts,omitempty"`
}

type Debt struct {
	ExpenseID uint    `gorm:"primaryKey" json:"-"`
	Expense   Expense `gorm:"foreignKey:ExpenseID"`
	DebtorID  uint    `gorm:"primaryKey" json:"-"`
	Debtor    Member  `gorm:"foreignKey:DebtorID"`
	Amount    decimal.Decimal
	Paid      decimal.Decimal
}

// CREATE TABLE polls(id INTEGER PRIMARY KEY AUTOINCREMENT, plan INTEGER, name STRING, options JSON, FOREIGN KEY plan REFERENCES plans(id))
type Poll struct {
	ID      uint   `gorm:"primaryKey;autoIncrement:true" json:"id"`
	PlanID  uint   `json:"-"`
	Options string `json:"options"`
	Votes   []Vote `gorm:"foreignKey:PollID;references:ID" json:"-"`
}

// CREATE TABLE votes(id INTEGER, poll INTEGER, user STRING, value JSON, FOREIGN KEY poll REFERENCES polls(id), FOREIGN KEY user REFERENCES user(username))
type Vote struct {
	PollID     uint   `gorm:"primaryKey" json:"-"`
	UsernameID string `gorm:"primaryKey" json:"username_id"`
	Value      string `json:"value"`
}