use crate::{AnimationFrames, Image, mock};

#[derive(Debug, Eq, PartialEq)]
pub struct Item {
    pub(crate) id: String,
    pub(crate) animation_frames: Vec<Image>,
    pub(crate) name: Option<String>,
    pub(crate) dialogue: Option<String>, // dialogue id
}

impl From<String> for Item {
    fn from(string: String) -> Item {
        let mut lines: Vec<&str> = string.lines().collect();

        let id = lines[0].replace("ITM ", "");
        let mut name = None;
        let mut dialogue = None;

        for _ in 0..2 {
            let last_line = lines.pop().unwrap();

            if last_line.starts_with("NAME") {
                name = Some(last_line.replace("NAME ", "").to_string());
            } else if last_line.starts_with("DLG") {
                dialogue = Some(last_line.replace("DLG ", "").to_string());
            } else {
                lines.push(last_line);
                break;
            }
        }

        // todo dedupe
        let animation_frames = lines[1..].join("");
        let animation_frames: Vec<&str> = animation_frames.split("\n>\n").collect();
        let animation_frames: Vec<Image> = animation_frames.iter().map(|&frame| {
            Image::from(frame.to_string())
        }).collect();

        Item { id, name, animation_frames, dialogue }
    }
}

impl ToString for Item {
    #[inline]
    fn to_string(&self) -> String {
        format!(
            "ITM {}\n{}{}{}",
            self.id,
            self.animation_frames.to_string(),
            if self.name.is_some() { format!("\nNAME {}", self.name.as_ref().unwrap()) } else { "".to_string() },
            if self.dialogue.is_some() { format!("\nDLG {}", self.dialogue.as_ref().unwrap()) } else { "".to_string() },
        )
    }
}

#[test]
fn test_item_from_string() {
    let output = Item::from(include_str!("../test/resources/item").to_string());
    let expected = mock::item();
    assert_eq!(output, expected);
}

#[test]
fn test_item_to_string() {
    let output = mock::item().to_string();
    let expected = include_str!("../test/resources/item").to_string();
    assert_eq!(output, expected);
}