nixpacks 0.1.9

use std::collections::BTreeMap;

use serde::Deserialize;

use crate::nixpacks::{
    app::App,
    environment::Environment,
    nix::pkg::Pkg,
    phase::{BuildPhase, InstallPhase, SetupPhase, StartPhase},
};
use anyhow::Result;

use super::Provider;

pub struct HaskellStackProvider {}

impl Provider for HaskellStackProvider {
    fn name(&self) -> &str {
        "haskell_stack"
    }

    fn detect(&self, app: &App, _env: &Environment) -> Result<bool> {
        Ok(app.includes_file("package.yaml") && app.has_match("**/*.hs"))
    }

    fn setup(&self, _app: &App, _env: &Environment) -> Result<Option<SetupPhase>> {
        let mut setup_phase = SetupPhase::new(vec![Pkg::new("stack")]);
        setup_phase.add_apt_pkgs(vec![
            "libgmp-dev".to_string(),
            "gcc".to_string(),
            "binutils".to_string(),
            "make".to_string(),
        ]);
        Ok(Some(setup_phase))
    }

    fn install(&self, _app: &App, _env: &Environment) -> Result<Option<InstallPhase>> {
        Ok(Some(InstallPhase::new("stack setup".to_string())))
    }

    fn build(&self, _app: &App, _env: &Environment) -> Result<Option<BuildPhase>> {
        Ok(Some(BuildPhase::new("stack build".to_string())))
    }

    fn start(&self, app: &App, _env: &Environment) -> Result<Option<StartPhase>> {
        let package: HaskellStackPackageYaml = app.read_yaml("package.yaml")?;
        let exe_names: Vec<String> = package.executables.keys().cloned().collect();
        Ok(Some(StartPhase::new(format!(
            "stack exec {}",
            exe_names
                .get(0)
                .ok_or_else(|| anyhow::anyhow!("Failed to get executable name"))?
        ))))
    }
}

#[derive(Deserialize)]
struct HaskellStackPackageYaml {
    pub executables: BTreeMap<String, HaskellStackExecutableDefinition>,
}

#[derive(Deserialize)]
struct HaskellStackExecutableDefinition {}