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use serde::ser::{SerializeStruct, Serializer};
use serde::Serialize;

use super::{Paragraph, SectionProperty, Table};
use crate::documents::BuildXML;
use crate::xml_builder::*;

#[derive(Debug, Clone, PartialEq, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct Document {
    pub children: Vec<DocumentChild>,
    pub section_property: SectionProperty,
    pub has_numbering: bool,
}

#[derive(Debug, Clone, PartialEq)]
pub enum DocumentChild {
    Paragraph(Paragraph),
    Table(Table),
}

impl Serialize for DocumentChild {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        match *self {
            DocumentChild::Paragraph(ref p) => {
                let mut t = serializer.serialize_struct("Paragraph", 2)?;
                t.serialize_field("type", "paragraph")?;
                t.serialize_field("data", p)?;
                t.end()
            }
            DocumentChild::Table(ref c) => {
                let mut t = serializer.serialize_struct("Table", 2)?;
                t.serialize_field("type", "table")?;
                t.serialize_field("data", c)?;
                t.end()
            }
        }
    }
}

impl Default for Document {
    fn default() -> Self {
        Self {
            children: Vec::new(),
            section_property: SectionProperty::new(),
            has_numbering: false,
        }
    }
}

impl Document {
    pub fn new() -> Document {
        Default::default()
    }

    pub fn add_paragraph(mut self, p: Paragraph) -> Self {
        if p.has_numbering {
            self.has_numbering = true
        }
        self.children.push(DocumentChild::Paragraph(p));
        self
    }

    pub fn add_table(mut self, t: Table) -> Self {
        if t.has_numbering {
            self.has_numbering = true
        }
        self.children.push(DocumentChild::Table(t));
        self
    }
}

impl BuildXML for Document {
    fn build(&self) -> Vec<u8> {
        let mut b = XMLBuilder::new()
            .declaration(Some(true))
            .open_document()
            .open_body();
        for c in &self.children {
            match c {
                DocumentChild::Paragraph(p) => b = b.add_child(p),
                DocumentChild::Table(t) => b = b.add_child(t),
            }
        }
        b.add_child(&self.section_property).close().close().build()
    }
}

#[cfg(test)]
mod tests {

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

    #[test]
    fn test_document() {
        let b = Document::new()
            .add_paragraph(Paragraph::new().add_run(Run::new().add_text("Hello")))
            .build();
        assert_eq!(
            str::from_utf8(&b).unwrap(),
            r#"<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<w:document xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:w10="urn:schemas-microsoft-com:office:word" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape" xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:wp14="http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" mc:Ignorable="w14 wp14">
  <w:body><w:p><w:pPr><w:pStyle w:val="Normal" /><w:rPr /></w:pPr><w:r><w:rPr /><w:t xml:space="preserve">Hello</w:t></w:r></w:p><w:sectPr><w:pgSz w:w="11906" w:h="16838" /><w:pgMar w:top="1985" w:right="1701" w:bottom="1701" w:left="1701" w:header="851" w:footer="992" w:gutter="0" /><w:cols w:space="425" />
  <w:docGrid w:type="lines" w:linePitch="360" />
</w:sectPr></w:body>
</w:document>"#
        );
    }
}