#![allow(dead_code)]
use fastnbt::error::Result;
use fastnbt::{from_bytes, Value};
use flate2::read::GzDecoder;
use serde::Deserialize;
use std::io::Read;

// This example show retrieving a players inventory from the palyer.dat file
// found in the world/playerdata directory.
//
// In particular we are avoiding allocating a new string for every inventory
// slot by instead having a &str with a lifetime tied to the input data.

#[derive(Deserialize, Debug)]
#[serde(rename_all = "PascalCase")]
struct PlayerDat<'a> {
    data_version: i32,

    #[serde(borrow)]
    inventory: Vec<InventorySlot<'a>>,
    ender_items: Vec<InventorySlot<'a>>,
}

#[derive(Deserialize, Debug)]
struct InventorySlot<'a> {
    id: &'a str,        // We avoid allocating a string here.
    tag: Option<Value>, // Also get the less structured properties of the object.

    // We need to rename fields a lot.
    #[serde(rename = "Count")]
    count: i8,
}

fn main() {
    let args: Vec<_> = std::env::args().skip(1).collect();
    let file = std::fs::File::open(args[0].clone()).unwrap();

    // Player dat files are compressed with GZip.
    let mut decoder = GzDecoder::new(file);
    let mut data = vec![];
    decoder.read_to_end(&mut data).unwrap();

    let player: Result<PlayerDat> = from_bytes(data.as_slice());

    println!("{:#?}", player);
}