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// c:strRef
use super::Formula;
use super::StringCache;
use quick_xml::events::{BytesStart, Event};
use quick_xml::Reader;
use quick_xml::Writer;
use std::io::Cursor;
use structs::Spreadsheet;
use writer::driver::*;

#[derive(Clone, Default, Debug)]
pub struct StringReference {
    formula: Formula,
    string_cache: StringCache,
}
impl StringReference {
    pub fn get_formula(&self) -> &Formula {
        &self.formula
    }

    pub fn get_formula_mut(&mut self) -> &mut Formula {
        &mut self.formula
    }

    pub fn set_formula(&mut self, value: Formula) -> &mut StringReference {
        self.formula = value;
        self
    }

    pub fn get_string_cache(&self) -> &StringCache {
        &self.string_cache
    }

    pub fn get_string_cache_mut(&mut self) -> &mut StringCache {
        &mut self.string_cache
    }

    pub fn set_string_cache(&mut self, value: StringCache) -> &mut StringReference {
        self.string_cache = value;
        self
    }

    pub(crate) fn set_attributes<R: std::io::BufRead>(
        &mut self,
        reader: &mut Reader<R>,
        _e: &BytesStart,
    ) {
        let mut buf = Vec::new();
        loop {
            match reader.read_event_into(&mut buf) {
                Ok(Event::Start(ref e)) => match e.name().0 {
                    b"c:f" => {
                        self.formula.set_attributes(reader, e);
                    }
                    b"c:strCache" => {
                        self.string_cache.set_attributes(reader, e);
                    }
                    _ => (),
                },
                Ok(Event::End(ref e)) => match e.name().0 {
                    b"c:strRef" => return,
                    _ => (),
                },
                Ok(Event::Eof) => panic!("Error not find {} end element", "c:strRef"),
                Err(e) => panic!("Error at position {}: {:?}", reader.buffer_position(), e),
                _ => (),
            }
            buf.clear();
        }
    }

    pub(crate) fn write_to(&self, writer: &mut Writer<Cursor<Vec<u8>>>, spreadsheet: &Spreadsheet) {
        // c:strRef
        write_start_tag(writer, "c:strRef", vec![], false);

        // c:f
        self.formula.write_to(writer);

        // c:strCache
        self.string_cache
            .write_to(writer, self.get_formula().get_address(), spreadsheet);

        write_end_tag(writer, "c:strRef");
    }
}