package nori

import (
	"encoding/binary"
	"io"
)

type Animation struct {
	Title [32]byte

	FrameCount uint32
	Frames     []*Frame
	Version    int
}

func NewAnimation(version int) *Animation {
	return &Animation{Version: version}
}

func (a *Animation) Decode(rd io.Reader) error {
	if err := binary.Read(rd, end, a.Title[:]); err != nil {
		return err
	}
	if err := binary.Read(rd, end, &a.FrameCount); err != nil {
		return err
	}
	if err := discardN(rd, 4*int(a.FrameCount)); err != nil {
		return err
	}
	a.Frames = make([]*Frame, int(a.FrameCount))
	for i := range a.Frames {
		a.Frames[i] = NewFrame(a.Version)
		if err := a.Frames[i].Decode(rd); err != nil {
			return err
		}
	}
	return nil
}