package goal

import "time"

// GoalType defines categories of goals users can set.
type GoalType string

const (
	GoalDistance  GoalType = "distance"
	GoalFrequency GoalType = "frequency"
	GoalPower     GoalType = "power"
	GoalWeight    GoalType = "weight"
	GoalCustom    GoalType = "custom"
)

// GoalStatus tracks the lifecycle of a goal.
type GoalStatus string

const (
	StatusActive    GoalStatus = "active"
	StatusCompleted GoalStatus = "completed"
	StatusArchived  GoalStatus = "archived"
)

type Goal struct {
	ID           uint       `gorm:"primaryKey" json:"id"`
	UserID       uint       `gorm:"not null;index" json:"user_id"`
	Title        string     `gorm:"not null" json:"title"`
	Description  string     `gorm:"default:''" json:"description"`
	GoalType     GoalType   `gorm:"default:'custom'" json:"goal_type"`
	TargetValue  float64    `gorm:"not null;default:0" json:"target_value"`
	CurrentValue float64    `gorm:"default:0" json:"current_value"`
	TargetDate   *time.Time `json:"target_date,omitempty"`
	Status       GoalStatus `gorm:"default:'active'" json:"status"`
	CreatedAt    time.Time  `json:"created_at"`
	UpdatedAt    time.Time  `json:"updated_at"`
}

func (Goal) TableName() string {
	return "goals"
}