use crate::math::{Rect, Vec2};
use ron::de::from_reader;
use ron::ser::{to_string_pretty, PrettyConfig};
use serde::{Deserialize, Serialize};
use std::fs::File;
use std::io::{self, Write};
use std::path::Path;

/// All the data of the currently opened map. This does not include things that are currently being
/// drawn, but not finished. It also does not contain Metadata, like the current position of the
/// transform, or the zoom-level
#[derive(Serialize, Deserialize)]
pub struct MapData {
    rooms: Vec<Rect<f32>>,
    walls: Vec<(Vec2<f32>, Vec2<f32>)>,
    icons: Vec<(usize, Vec2<f32>)>,
}

impl MapData {
    pub fn new() -> Self {
        Self {
            rooms: Vec::new(),
            walls: Vec::new(),
            icons: Vec::new(),
        }
    }

    pub fn load_file<P: AsRef<Path>>(&mut self, path: P) -> io::Result<()> {
        let file = File::open(&path)?;
        let mut data: Self = match from_reader(file) {
            Ok(data) => data,
            Err(err) => {
                return Err(io::Error::new(io::ErrorKind::InvalidData, err));
            }
        };

        /* Append map data to the currently loaded map. (Default behaviour might change in the
         * future)
         */
        self.rooms.append(&mut data.rooms);
        self.walls.append(&mut data.walls);
        self.icons.append(&mut data.icons);

        Ok(())
    }

    pub fn write_file<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
        let mut file = File::create(&path)?;

        let pretty_conf = PrettyConfig::new()
            .with_depth_limit(4)
            .with_decimal_floats(true)
            .with_separate_tuple_members(true)
            .with_indentor("\t".to_owned());
        let string = match to_string_pretty(&self, pretty_conf) {
            Ok(string) => string,
            Err(err) => {
                return Err(io::Error::new(io::ErrorKind::InvalidInput, err));
            }
        };

        file.write_all(&string.as_bytes())
    }

    pub fn rooms(&self) -> &Vec<Rect<f32>> {
        &self.rooms
    }
    pub fn rooms_mut(&mut self) -> &mut Vec<Rect<f32>> {
        &mut self.rooms
    }

    pub fn walls(&self) -> &Vec<(Vec2<f32>, Vec2<f32>)> {
        &self.walls
    }
    pub fn walls_mut(&mut self) -> &mut Vec<(Vec2<f32>, Vec2<f32>)> {
        &mut self.walls
    }

    pub fn icons(&self) -> &Vec<(usize, Vec2<f32>)> {
        &self.icons
    }
    pub fn icons_mut(&mut self) -> &mut Vec<(usize, Vec2<f32>)> {
        &mut self.icons
    }
}