package board

// ────────────────────────────────────────────────────────────────────────────── //
// NOTES STRUCTURE                                                                //
// ────────────────────────────────────────────────────────────────────────────── //

type Notes struct {
	numbers []int
}

func (n *Notes) Add(field *Field, cell *Cell, note int, trigger string, marks []Mark) {
	for _, existing := range n.numbers {
		if existing == note {
			return // Note already exists
		}
	}
	field.changes = append(field.changes, Change{
		Cell:       cell,
		marks:      marks,
		action:     ActionSetNote,
		value:      note,
		from:       0,
		triggerdBy: trigger,
	})
	n.numbers = append(n.numbers, note)
}

func (n *Notes) Remove(field *Field, cell *Cell, note int, trigger string, marks []Mark) {
	for i, existing := range n.numbers {
		if existing == note {
			field.changes = append(field.changes, Change{
				Cell:       cell,
				marks:      marks,
				action:     ActionRemoveNote,
				value:      0,
				from:       note,
				triggerdBy: trigger,
			})

			n.numbers = append(n.numbers[:i], n.numbers[i+1:]...)
			return
		}
	}
}

// ────────────────────────────────────────────────────────────────────────────── //
// CELL STRUCTURE                                                                 //
// ────────────────────────────────────────────────────────────────────────────── //

type Cell struct {
	number int
	Notes  *Notes
	Pos    *Position
}

func (c *Cell) SetNumber(field *Field, n int, trigger string, marks []Mark) {
	if c.number == n {
		return
	}

	if field == nil {
		return
	}

	if n <= 0 || n > field.rows || n > field.columns {
		return
	}

	field.changes = append(field.changes, Change{
		Cell:       c,
		marks:      marks,
		action:     ActionSetNumber,
		value:      n,
		from:       c.number,
		triggerdBy: trigger,
	})

	c.number = n
}

func (c *Cell) RemoveNumber(field *Field, trigger string, marks []Mark) {
	if c.number == 0 {
		return
	}

	if field == nil {
		return
	}

	field.changes = append(field.changes, Change{
		action:     ActionSetNumber,
		Cell:       c,
		value:      0,
		from:       c.number,
		marks:      marks,
		triggerdBy: trigger,
	})

	c.number = 0
}