use std::any::Any;

use super::macros::intermediate;
use super::IObject;
use crate::error::CustomError;
use organic::types::StandardProperties;

#[derive(Debug, Clone)]
pub(crate) struct IParagraph {
    pub(crate) children: Vec<IObject>,
    pub(crate) post_blank: organic::types::PostBlank,
}

intermediate!(
    IParagraph,
    &'orig organic::types::Paragraph<'parse>,
    original,
    intermediate_context,
    {
        let children = {
            let mut ret = Vec::new();
            for obj in original.children.iter() {
                ret.push(IObject::new(intermediate_context.clone(), obj).await?);
            }
            ret
        };

        Ok(IParagraph {
            children,
            post_blank: original.get_post_blank(),
        })
    }
);

impl IParagraph {
    pub(crate) async fn artificial<'orig, 'parse>(
        _intermediate_context: crate::intermediate::IntermediateContext<'orig, 'parse>,
        children: Vec<IObject>,
        post_blank: organic::types::PostBlank,
    ) -> Result<IParagraph, CustomError> {
        Ok(IParagraph {
            children,
            post_blank,
        })
    }

    /// Checks if the paragraph contains nothing but a single image.
    ///
    /// When this happens, we want to center the image.
    pub(crate) fn is_single_image(&self) -> bool {
        let num_images = self
            .children
            .iter()
            .filter(|c| match c {
                IObject::RegularLink(iregular_link) => match &iregular_link.target {
                    super::LinkTarget::Image { src, alt } => true,
                    _ => false,
                },
                _ => false,
            })
            .count();
        num_images == 1
            && self.children.iter().all(|c| match c {
                IObject::RegularLink(iregular_link) => match &iregular_link.target {
                    super::LinkTarget::Image { src, alt } => true,
                    _ => false,
                },
                IObject::PlainText(iplain_text) => {
                    iplain_text.source.chars().all(|c| c.is_ascii_whitespace())
                }
                _ => false,
            })
    }
}