use std::fs::{self, File};
use std::io;
use std::io::Write;

use shadow_rs::SdResult;

fn main() -> SdResult<()> {
    shadow_rs::ShadowBuilder::builder()
        .hook(gen_presets_hook)
        .build()?;

    #[cfg(windows)]
    {
        let mut res = winres::WindowsResource::new();
        res.set_manifest_file("starship.exe.manifest")
            .set_icon("media/icon.ico");
        res.compile()?;
    }

    Ok(())
}

fn gen_presets_hook(mut file: &File) -> SdResult<()> {
    println!("cargo:rerun-if-changed=docs/public/presets/toml");
    let paths = fs::read_dir("docs/public/presets/toml")?;
    let mut sortedpaths = paths.collect::<io::Result<Vec<_>>>()?;
    sortedpaths.sort_by_key(std::fs::DirEntry::path);

    let mut presets = String::new();
    let mut match_arms = String::new();
    for unwrapped in sortedpaths {
        let file_name = unwrapped.file_name();
        let full_path = dunce::canonicalize(unwrapped.path())?;
        let full_path = full_path.to_str().expect("failed to convert to string");
        let name = file_name
            .to_str()
            .and_then(|v| v.strip_suffix(".toml"))
            .expect("Failed to process filename");
        presets.push_str(format!("print::Preset(\"{name}\"),\n").as_str());
        match_arms.push_str(format!(r#""{name}" => include_bytes!(r"{full_path}"),"#).as_str());
    }

    writeln!(
        file,
        r"
use crate::print;

pub fn get_preset_list<'a>() -> &'a [print::Preset] {{
    &[
        {presets}
    ]
}}

pub fn get_preset_content(name: &str) -> &[u8] {{
    match name {{
    {match_arms}
    _ => unreachable!(),
    }}
}}
"
    )?;
    Ok(())
}
