use clap::{App, SubCommand};
use core::str;
use failure::bail;
use tools::{
    generate, gen_tests, install_format_hook, run, run_with_output, run_rustfmt,
    Overwrite, Result, run_fuzzer,
};

fn main() -> Result<()> {
    let matches = App::new("tasks")
        .setting(clap::AppSettings::SubcommandRequiredElseHelp)
        .subcommand(SubCommand::with_name("gen-syntax"))
        .subcommand(SubCommand::with_name("gen-tests"))
        .subcommand(SubCommand::with_name("install-code"))
        .subcommand(SubCommand::with_name("format"))
        .subcommand(SubCommand::with_name("format-hook"))
        .subcommand(SubCommand::with_name("fuzz-tests"))
        .get_matches();
    match matches.subcommand_name().expect("Subcommand must be specified") {
        "install-code" => install_code_extension()?,
        "gen-tests" => gen_tests(Overwrite)?,
        "gen-syntax" => generate(Overwrite)?,
        "format" => run_rustfmt(Overwrite)?,
        "format-hook" => install_format_hook()?,
        "fuzz-tests" => run_fuzzer()?,
        _ => unreachable!(),
    }
    Ok(())
}

fn install_code_extension() -> Result<()> {
    run("cargo install --path crates/ra_lsp_server --force", ".")?;
    if cfg!(windows) {
        run(r"cmd.exe /c npm.cmd ci", "./editors/code")?;
        run(r"cmd.exe /c npm.cmd run package", "./editors/code")?;
    } else {
        run(r"npm ci", "./editors/code")?;
        run(r"npm run package", "./editors/code")?;
    }
    if cfg!(windows) {
        run(
            r"cmd.exe /c code.cmd --install-extension ./ra-lsp-0.0.1.vsix --force",
            "./editors/code",
        )?;
    } else {
        run(r"code --install-extension ./ra-lsp-0.0.1.vsix --force", "./editors/code")?;
    }
    verify_installed_extensions()?;
    Ok(())
}

fn verify_installed_extensions() -> Result<()> {
    let exts = if cfg!(windows) {
        run_with_output(r"cmd.exe /c code.cmd --list-extensions", ".")?
    } else {
        run_with_output(r"code --list-extensions", ".")?
    };
    if !str::from_utf8(&exts.stdout)?.contains("ra-lsp") {
        bail!(
            "Could not install the Visual Studio Code extension. Please make sure you \
             have at least NodeJS 10.x installed and try again."
        );
    }
    Ok(())
}