package field

import "slices"

type Notes struct {
	numbers []int
}

func (n *Notes) Add(f *Field, cell *Cell, note int, trigger string, marks []Mark) error {
	if n == nil || cell == nil || cell.notes != n {
		return ErrInvalidCell
	}
	return f.AddChange(&ExternalChange{Cell: cell, Marks: marks, Action: ActionSetNote, Value: note, TriggerdBy: trigger})
}

func (n *Notes) Remove(f *Field, cell *Cell, note int, trigger string, marks []Mark) error {
	if n == nil || cell == nil || cell.notes != n {
		return ErrInvalidCell
	}
	return f.AddChange(&ExternalChange{Cell: cell, Marks: marks, Action: ActionRemoveNote, From: note, TriggerdBy: trigger})
}

func (n *Notes) Get() []int {
	if n == nil {
		return nil
	}
	return slices.Clone(n.numbers)
}

func (n *Notes) Has(number int) bool {
	return n != nil && slices.Contains(n.numbers, number)
}

type Cell struct {
	number int
	notes  *Notes
	pos    *Position
}

func NewCell(number int, pos *Position) *Cell {
	return &Cell{number: number, notes: &Notes{}, pos: pos}
}

func (c *Cell) SetNumber(f *Field, number int, trigger string, marks []Mark) error {
	if c == nil {
		return ErrInvalidCell
	}
	return f.AddChange(&ExternalChange{Cell: c, Marks: marks, Action: ActionSetNumber, Value: number, From: c.number, TriggerdBy: trigger})
}

func (c *Cell) RemoveNumber(f *Field, trigger string, marks []Mark) error {
	if c == nil {
		return ErrInvalidCell
	}
	return f.AddChange(&ExternalChange{Cell: c, Marks: marks, Action: ActionRemoveNumber, From: c.number, TriggerdBy: trigger})
}

func (c *Cell) GetNumber() int {
	if c == nil {
		return 0
	}
	return c.number
}

func (c *Cell) GetNotes() *Notes {
	if c == nil {
		return nil
	}
	return c.notes
}

func (c *Cell) GetPosition() *Position {
	if c == nil {
		return nil
	}
	return c.pos
}