use std::collections::HashMap;

pub trait Component {
    fn render(self: Box<Self>) -> Vec<RenderNode>;
}

pub enum RenderNode {
    Component(Box<dyn Component>),
    Element {
        name: String,
        attributes: HashMap<String, String>,
        children: Vec<RenderNode>
    },
    TextNode {
        content: String,
    },
    Portal,
    Null,
}

impl RenderNode {
    pub(crate) fn render_to_string(self) -> String {
        match self {
            RenderNode::Component(component) => {
                let elements = component.render();
                elements.into_iter()
                    .map(|child| child.render_to_string())
                    .collect::<Vec<_>>().join("")

            },

            RenderNode::Element { name, attributes, children } => {
                let text_attributes = attributes.into_iter()
                    .map(|(key, value)| format!(" {key}=\"{value}\""))
                    .collect::<Vec<_>>().join("");

                let rendered_children = children.into_iter()
                    .map(|child| child.render_to_string())
                    .collect::<Vec<_>>().join("");

                format!("<{name}{text_attributes}>{rendered_children}</{name}>")
            },

            RenderNode::TextNode { content } => content,
            RenderNode::Portal => todo!(),
            RenderNode::Null => "".to_string(),
        }
    }
}