//! Example: generate SFX sounds from JSON presets and write to WAV.

use soundgen_fmt::{render_spec, PresetCategory, PresetRegistry};
use soundgen_io::write_wav;
use std::path::Path;

fn main() {
    let presets_dir = Path::new("presets");

    let registry = PresetRegistry::load_dir(presets_dir).unwrap_or_else(|e| {
        eprintln!(
            "Warning: could not load presets from {}: {}",
            presets_dir.display(),
            e
        );
        PresetRegistry::new()
    });

    if registry.is_empty() {
        eprintln!("No presets found. Run from the project root directory.");
        std::process::exit(1);
    }

    // Generate all SFX presets
    let sfx = registry.list(Some(PresetCategory::Sfx));
    let ui = registry.list(Some(PresetCategory::Ui));

    let out_dir = Path::new("sfx_output");
    std::fs::create_dir_all(out_dir).expect("create output dir");

    for entry in sfx.iter().chain(ui.iter()) {
        let samples = render_spec(&entry.spec);
        let filename = format!("{}.wav", entry.name);
        let out_path = out_dir.join(&filename);
        write_wav(&out_path, &samples, entry.spec.sample_rate)
            .unwrap_or_else(|e| eprintln!("Failed to write {}: {}", out_path.display(), e));
        eprintln!(
            "  {} → {} ({} samples, {:.2}s)",
            entry.name,
            out_path.display(),
            samples.len() / 2,
            entry.spec.duration
        );
    }

    eprintln!(
        "\nGenerated {} sounds to {}",
        sfx.len() + ui.len(),
        out_dir.display()
    );
}