package main

import (
	"time"
)

// User represents a registered user
type User struct {
	ID        int       `json:"id" db:"id"`
	Username  string    `json:"username" db:"username"`
	Email     string    `json:"email" db:"email"`
	Password  string    `json:"-" db:"password"` // Hidden from JSON
	CreatedAt time.Time `json:"created_at" db:"created_at"`
	UpdatedAt time.Time `json:"updated_at" db:"updated_at"`
}

// Counter represents a counter entity
type Counter struct {
	ID          int       `json:"id" db:"id"`
	UserID      *int      `json:"user_id,omitempty" db:"user_id"` // nil for anonymous users
	Name        string    `json:"name" db:"name"`
	Description string    `json:"description" db:"description"`
	CreatedAt   time.Time `json:"created_at" db:"created_at"`
	UpdatedAt   time.Time `json:"updated_at" db:"updated_at"`
}

// CounterEntry represents a single increment/decrement entry
type CounterEntry struct {
	ID        int       `json:"id" db:"id"`
	CounterID int       `json:"counter_id" db:"counter_id"`
	Value     int       `json:"value" db:"value"` // +1 for increment, -1 for decrement
	Date      time.Time `json:"date" db:"date"`
	CreatedAt time.Time `json:"created_at" db:"created_at"`
}

// CounterWithStats represents a counter with aggregated statistics
type CounterWithStats struct {
	Counter
	TotalValue int `json:"total_value"`
	TodayValue int `json:"today_value"`
	WeekValue  int `json:"week_value"`
	MonthValue int `json:"month_value"`
	EntryCount int `json:"entry_count"`
}

// AnonymousCounter represents a counter for anonymous users (stored in localStorage)
type AnonymousCounter struct {
	ID          string         `json:"id"`
	Name        string         `json:"name"`
	Description string         `json:"description"`
	TotalValue  int            `json:"total_value"`
	Entries     map[string]int `json:"entries"` // date -> count
	CreatedAt   time.Time      `json:"created_at"`
	UpdatedAt   time.Time      `json:"updated_at"`
}

// Request/Response DTOs

type RegisterRequest struct {
	Username string `json:"username" binding:"required,min=3,max=50"`
	Email    string `json:"email" binding:"required,email"`
	Password string `json:"password" binding:"required,min=6"`
}

type LoginRequest struct {
	Username string `json:"username" binding:"required"`
	Password string `json:"password" binding:"required"`
}

type AuthResponse struct {
	Token string `json:"token"`
	User  User   `json:"user"`
}

type CreateCounterRequest struct {
	Name        string `json:"name" binding:"required,min=1,max=100"`
	Description string `json:"description" max:"500"`
}

type UpdateCounterRequest struct {
	Name        string `json:"name" binding:"required,min=1,max=100"`
	Description string `json:"description" max:"500"`
}

type IncrementRequest struct {
	Value int `json:"value" binding:"required"`
}

type CounterStatsRequest struct {
	StartDate *time.Time `json:"start_date"`
	EndDate   *time.Time `json:"end_date"`
}