package models

import (
	"time"

	"github.com/google/uuid"
	"github.com/shopspring/decimal"
)

type CategoryType string

const (
	CategoryBill            CategoryType = "bill"
	CategoryVariableExpense CategoryType = "variable_expense"
	CategoryDebt            CategoryType = "debt"
	CategorySaving          CategoryType = "saving"
	CategoryInvestment      CategoryType = "investment"
	CategoryIncome          CategoryType = "income"
)

type User struct {
	ID              uuid.UUID `json:"id"`
	Email           string    `json:"email"`
	PasswordHash    string    `json:"-"`
	OIDCSubject     *string   `json:"oidc_subject,omitempty"`
	DisplayName     string    `json:"display_name"`
	PreferredLocale string    `json:"preferred_locale"`
	CreatedAt       time.Time `json:"created_at"`
	UpdatedAt       time.Time `json:"updated_at"`
}

type Category struct {
	ID        uuid.UUID    `json:"id"`
	UserID    uuid.UUID    `json:"user_id"`
	Name      string       `json:"name"`
	Type      CategoryType `json:"type"`
	Icon      string       `json:"icon"`
	SortOrder int          `json:"sort_order"`
	CreatedAt time.Time    `json:"created_at"`
	UpdatedAt time.Time    `json:"updated_at"`
}

type Budget struct {
	ID              uuid.UUID       `json:"id"`
	UserID          uuid.UUID       `json:"user_id"`
	Name            string          `json:"name"`
	StartDate       time.Time       `json:"start_date"`
	EndDate         time.Time       `json:"end_date"`
	Currency        string          `json:"currency"`
	CarryoverAmount decimal.Decimal `json:"carryover_amount"`
	CreatedAt       time.Time       `json:"created_at"`
	UpdatedAt       time.Time       `json:"updated_at"`
}

type BudgetItem struct {
	ID             uuid.UUID       `json:"id"`
	BudgetID       uuid.UUID       `json:"budget_id"`
	CategoryID     uuid.UUID       `json:"category_id"`
	CategoryName   string          `json:"category_name,omitempty"`
	CategoryType   CategoryType    `json:"category_type,omitempty"`
	BudgetedAmount decimal.Decimal `json:"budgeted_amount"`
	ActualAmount   decimal.Decimal `json:"actual_amount"`
	Notes          string          `json:"notes"`
	CreatedAt      time.Time       `json:"created_at"`
	UpdatedAt      time.Time       `json:"updated_at"`
}

type BudgetTotals struct {
	IncomeBudget      decimal.Decimal `json:"income_budget"`
	IncomeActual      decimal.Decimal `json:"income_actual"`
	BillsBudget       decimal.Decimal `json:"bills_budget"`
	BillsActual       decimal.Decimal `json:"bills_actual"`
	ExpensesBudget    decimal.Decimal `json:"expenses_budget"`
	ExpensesActual    decimal.Decimal `json:"expenses_actual"`
	DebtsBudget       decimal.Decimal `json:"debts_budget"`
	DebtsActual       decimal.Decimal `json:"debts_actual"`
	SavingsBudget     decimal.Decimal `json:"savings_budget"`
	SavingsActual     decimal.Decimal `json:"savings_actual"`
	InvestmentsBudget decimal.Decimal `json:"investments_budget"`
	InvestmentsActual decimal.Decimal `json:"investments_actual"`
	Available         decimal.Decimal `json:"available"`
}

type BudgetDetail struct {
	Budget
	Items  []BudgetItem `json:"items"`
	Totals BudgetTotals `json:"totals"`
}