package models

import "time"

type AtomSource string

const (
	SourceTrello  AtomSource = "trello"
	SourceTodoist AtomSource = "todoist"
	SourceMeal    AtomSource = "plantoeat"
)

type AtomType string

const (
	TypeTask AtomType = "task"
	TypeNote AtomType = "note"
	TypeMeal AtomType = "meal"
)

// Atom represents a unified unit of work or information
type Atom struct {
	ID          string
	Title       string
	Description string
	Source      AtomSource
	Type        AtomType

	// Metadata
	URL       string
	DueDate   *time.Time
	CreatedAt time.Time

	Priority int // Normalized: 1 (Low) to 4 (Urgent)

	// UI Helpers (to be populated by mappers)
	SourceIcon string // e.g., "trello-icon.svg" or emoji
	ColorClass string // e.g., "border-blue-500"

	// Original Data (for write operations)
	Raw interface{}
}

// TaskToAtom converts a Todoist Task to an Atom
func TaskToAtom(t Task) Atom {
	// Todoist priority: 1 (normal) to 4 (urgent)
	// Keep as-is since it already matches our 1-4 scale
	priority := t.Priority
	if priority < 1 {
		priority = 1
	}
	if priority > 4 {
		priority = 4
	}

	return Atom{
		ID:          t.ID,
		Title:       t.Content,
		Description: t.Description,
		Source:      SourceTodoist,
		Type:        TypeTask,
		URL:         t.URL,
		DueDate:     t.DueDate,
		CreatedAt:   t.CreatedAt,
		Priority:    priority,
		SourceIcon:  "✓", // Checkmark emoji for tasks
		ColorClass:  "border-red-500",
		Raw:         t,
	}
}

// CardToAtom converts a Trello Card to an Atom
func CardToAtom(c Card) Atom {
	// Trello doesn't have explicit priority, default to medium (2)
	// Can be enhanced later with label-based priority detection
	priority := 2

	return Atom{
		ID:          c.ID,
		Title:       c.Name,
		Description: c.ListName, // Use list name as description
		Source:      SourceTrello,
		Type:        TypeTask,
		URL:         c.URL,
		DueDate:     c.DueDate,
		CreatedAt:   time.Time{}, // Trello ID contains timestamp, can be parsed later
		Priority:    priority,
		SourceIcon:  "📋", // Clipboard emoji for boards
		ColorClass:  "border-blue-500",
		Raw:         c,
	}
}

// MealToAtom converts a PlanToEat Meal to an Atom
func MealToAtom(m Meal) Atom {
	// Meals don't have priority, default to low (1)
	priority := 1

	return Atom{
		ID:          m.ID,
		Title:       m.RecipeName,
		Description: m.MealType, // breakfast, lunch, dinner
		Source:      SourceMeal,
		Type:        TypeMeal,
		URL:         m.RecipeURL,
		DueDate:     &m.Date, // Meal date is effectively the "due date"
		CreatedAt:   time.Time{},
		Priority:    priority,
		SourceIcon:  "🍽️", // Fork and knife emoji for meals
		ColorClass:  "border-green-500",
		Raw:         m,
	}
}