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use serde::Serialize;

use crate::documents::BuildXML;
use crate::types::*;
use crate::xml_builder::*;

#[derive(Debug, Clone, PartialEq, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct CellMargin {
    pub val: usize,
    pub width_type: WidthType,
}

impl CellMargin {
    pub fn new(val: usize, t: WidthType) -> Self {
        Self { val, width_type: t }
    }
}

impl Default for CellMargin {
    fn default() -> CellMargin {
        CellMargin {
            val: 55,
            width_type: WidthType::Dxa,
        }
    }
}

#[derive(Debug, Clone, PartialEq, Serialize, Default)]
#[serde(rename_all = "camelCase")]
pub struct CellMargins {
    #[serde(skip_serializing_if = "Option::is_none")]
    top: Option<CellMargin>,
    #[serde(skip_serializing_if = "Option::is_none")]
    left: Option<CellMargin>,
    #[serde(skip_serializing_if = "Option::is_none")]
    bottom: Option<CellMargin>,
    #[serde(skip_serializing_if = "Option::is_none")]
    right: Option<CellMargin>,
}

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

    pub fn margin_top(mut self, v: usize, t: WidthType) -> Self {
        self.top = Some(CellMargin::new(v, t));
        self
    }

    pub fn margin_right(mut self, v: usize, t: WidthType) -> Self {
        self.right = Some(CellMargin::new(v, t));
        self
    }

    pub fn margin_left(mut self, v: usize, t: WidthType) -> Self {
        self.left = Some(CellMargin::new(v, t));
        self
    }

    pub fn margin_bottom(mut self, v: usize, t: WidthType) -> Self {
        self.bottom = Some(CellMargin::new(v, t));
        self
    }
}

impl BuildXML for CellMargins {
    fn build(&self) -> Vec<u8> {
        let mut b = XMLBuilder::new().open_cell_margins();

        if let Some(ref top) = self.top {
            b = b.margin_top(top.val as i32, top.width_type);
        }

        if let Some(ref left) = self.left {
            b = b.margin_left(left.val as i32, left.width_type);
        }

        if let Some(ref bottom) = self.bottom {
            b = b.margin_bottom(bottom.val as i32, bottom.width_type);
        }

        if let Some(ref right) = self.right {
            b = b.margin_right(right.val as i32, right.width_type);
        }
        b.close().build()
    }
}

#[cfg(test)]
mod tests {

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

    #[test]
    fn test_cell_margin() {
        let b = CellMargins::new().margin_top(10, WidthType::Dxa).build();
        assert_eq!(
            str::from_utf8(&b).unwrap(),
            r#"<w:tcMar>
  <w:top w:w="10" w:type="dxa" />
</w:tcMar>"#
        );
    }
}