use super::Justification;
use crate::documents::BuildXML;
use crate::types::AlignmentType;
use crate::xml_builder::*;

#[derive(Debug)]
pub struct ParagraphProperty {
    alignment: Option<Justification>,
}

impl Default for ParagraphProperty {
    fn default() -> Self {
        ParagraphProperty { alignment: None }
    }
}

// 17.3.1.26
// pPr (Paragraph Properties)
// This element specifies a set of paragraph properties which shall be applied to the contents of the parent
// paragraph after all style/numbering/table properties have been applied to the text. These properties are defined
// as direct formatting, since they are directly applied to the paragraph and supersede any formatting from styles.
impl ParagraphProperty {
    pub fn new() -> ParagraphProperty {
        Default::default()
    }

    pub fn align(mut self, alignment_type: AlignmentType) -> ParagraphProperty {
        self.alignment = Some(Justification::new(alignment_type.to_string()));
        self
    }
}

impl BuildXML for ParagraphProperty {
    fn build(&self) -> Vec<u8> {
        let b = XMLBuilder::new();
        let p = b
            .open_paragraph_property()
            .add_optional_child(&self.alignment);
        p.close().build()
    }
}

#[cfg(test)]
mod tests {

    use super::*;
    #[cfg(test)]
    use pretty_assertions::assert_eq;
    use std::str;

    #[test]
    fn test_build() {
        let c = ParagraphProperty::new();
        let b = c.build();
        assert_eq!(str::from_utf8(&b).unwrap(), r#"<w:pPr />"#);
    }
}