package ttymididrv

import (
	"sync"

	"gitlab.com/gomidi/midi"
)

type driver struct {
	mu     sync.RWMutex
	outs   []midi.Out
	opened []midi.Port
	closed bool
}

func New(name string, baud int) midi.Driver {
	d := &driver{}
	d.outs = []midi.Out{
		&out{
			name:   name,
			baud:   baud,
			number: 0,
			driver: d,
		},
	}

	return d
}

func (d *driver) String() string {
	return "ttymididrv"
}

func (d *driver) Close() (err error) {
	d.mu.RLock()
	if d.closed {
		d.mu.RUnlock()
		return midi.ErrPortClosed
	}
	d.mu.RUnlock()

	d.mu.Lock()
	d.closed = true
	d.mu.Unlock()

	for _, p := range d.opened {
		err = p.Close()
	}

	return
}

func (d *driver) Ins() ([]midi.In, error) {
	d.mu.Lock()
	defer d.mu.Unlock()

	if d.closed {
		return nil, midi.ErrPortClosed
	}

	return nil, nil
}

func (d *driver) Outs() ([]midi.Out, error) {
	d.mu.Lock()
	defer d.mu.Unlock()

	if d.closed {
		return nil, midi.ErrPortClosed
	}

	return d.outs, nil
}