//! Marathon Sounds format handling.

pub mod defs;
pub mod snds;

use crate::{bin::Ident, err::*};
use std::{collections::BTreeMap, io::prelude::*};

/// Reads all sounds from a Sound file.
pub fn read(fp: &mut impl Read) -> ResultS<Vec<SoundTable>>
{
	let mut b = Vec::new();
	fp.read_to_end(&mut b)?;

	read_data! {
		endian: BIG, buf: &b, size: 260, start: 0, data {
			let version = u32[0];
			let magic   = Ident[4];
			let src_num = u16[8] usize;
			let snd_num = u16[10] usize;
		}
	}

	if version != 1 || magic != b"snd2" {
		bail!("bad sound header");
	}

	let mut sc = Vec::with_capacity(src_num);

	for i in 0..src_num {
		let p = 260 + i * 64;

		let mut st = SoundTable::new();

		for _ in 0..snd_num {
			if let Some((ofs, idx, mut def)) = defs::read(&b[p..p + 64])? {
				for &ofs in &ofs {
					def.sounds.push(snds::read(&b[ofs..])?);
				}

				st.insert(idx, def);
			}
		}

		sc.push(st);
	}

	Ok(sc)
}

/// A table of sound definitions.
pub type SoundTable = BTreeMap<u16, defs::SoundDef>;

// EOF