//! `h5rs`: HDF5 command-line tools built on clawhdf5 alone, no libhdf5.
//!
//! The binary's subcommands (`ls`, `dump`, `stat`, `diff`, `check`) live in
//! the modules below; [`run`] dispatches to them. See the crate README for
//! the command reference.

pub mod check;
pub mod cli;
pub mod diff;
pub mod dtype;
pub mod dump;
pub mod h5;
pub mod heap_blocks;
pub mod info;
pub mod ls;
pub mod stat;
pub mod value;

use cli::{Args, Out};

pub const USAGE: &str = "\
h5rs: HDF5 tools in pure Rust (clawhdf5, no libhdf5)

usage: h5rs <command> [options] ...

commands:
  ls     list objects (like h5ls)
  dump   print a file's structure and values as DDL or JSON (like h5dump)
  stat   object, layout, filter and storage statistics (like h5stat)
  diff   compare two files (like h5diff)
  check  validate a file's structure and checksums

Run `h5rs <command> --help` for a command's options.";

/// Run `h5rs` with `argv` (without the program name). Returns the exit
/// status.
pub fn run(argv: Vec<String>, out: &mut Out) -> std::io::Result<i32> {
    let mut it = argv.into_iter();
    let Some(cmd) = it.next() else {
        writeln!(out.e, "{USAGE}")?;
        return Ok(2);
    };
    let rest: Vec<String> = it.collect();
    match cmd.as_str() {
        "ls" => ls::run(&mut Args::new("ls", rest), out),
        "dump" => dump::run(&mut Args::new("dump", rest), out),
        "stat" => stat::run(&mut Args::new("stat", rest), out),
        "diff" => diff::run(&mut Args::new("diff", rest), out),
        "check" => check::run(&mut Args::new("check", rest), out),
        "-h" | "--help" | "help" => {
            writeln!(out.o, "{USAGE}")?;
            Ok(0)
        }
        "-V" | "--version" => {
            writeln!(out.o, "h5rs {}", env!("CARGO_PKG_VERSION"))?;
            Ok(0)
        }
        other => {
            writeln!(out.e, "h5rs: unknown command {other:?}\n\n{USAGE}")?;
            Ok(2)
        }
    }
}