import AsyncDisplayKit

class PostCell: ASCellNode {
    let post: Post

    // MARK: - Nodes

    let headerNode: HeaderNode
    let postImage: ASImageNode
    let actionNode: ActionNode
    let postLikes: ASTextNode
    let postDescription: ASTextNode

    init(post: Post) {
        self.post = post
        headerNode = HeaderNode(post: post)

        postImage = ASImageNode()
        postImage.contentMode = .scaleAspectFit
        postImage.style.width = ASDimension(unit: .fraction, value: 1)
        postImage.image = post.image

        actionNode = ActionNode()

        postLikes = ASTextNode()
        postLikes.attributedText = NSAttributedString.bold("\(post.likeCount) Likes")

        postDescription = ASTextNode()
        postDescription.maximumNumberOfLines = 0
        postDescription.attributedText = NSAttributedString.normal(post.description)

        super.init()

        self.automaticallyManagesSubnodes = true
    }

    override func layoutSpecThatFits(_ constrainedSize: ASSizeRange) -> ASLayoutSpec {

        let postImageWithRatio = ASRatioLayoutSpec(ratio: 1/1.5, child: postImage)

        let postLikesWithPadding = ASInsetLayoutSpec(insets: UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 8), child: self.postLikes)

        let postDescriptionWithPadding = ASInsetLayoutSpec(insets: UIEdgeInsets(top: 4, left: 8, bottom: 0, right: 8), child: self.postDescription)

        let mainStack = ASStackLayoutSpec(direction: .vertical,
                                          spacing: 0,
                                          justifyContent: .start,
                                          alignItems: .start,
                                          children: [headerNode,
                                                     postImageWithRatio,
                                                     actionNode,
                                                     postLikesWithPadding,
                                                     postDescriptionWithPadding])

        return mainStack
    }
}