quilt-rs 0.21.1

use crate::cli::model::Commands;
use crate::cli::output::Std;
use crate::cli::Error;

pub struct Output {
    installed_packages_list: Vec<quilt_rs::InstalledPackage>,
}

impl std::fmt::Display for Output {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        if self.installed_packages_list.is_empty() {
            return write!(f, "No installed packages");
        }
        let mut output: Vec<String> = Vec::new();
        for installed_package in &self.installed_packages_list {
            output.push(format!("InstalledPackage<{}>", installed_package.namespace));
        }
        write!(f, "{}", output.join("\n"))
    }
}

pub async fn command(m: impl Commands) -> Std {
    Std::from_result(m.list().await)
}

pub async fn model(local_domain: &quilt_rs::LocalDomain) -> Result<Output, Error> {
    let installed_packages_list = local_domain.list_installed_packages().await?;
    Ok(Output {
        installed_packages_list,
    })
}

#[cfg(test)]
mod tests {
    use super::*;

    use test_log::test;

    use crate::cli::fixtures::packages::default as pkg;
    use crate::cli::model::create_model_in_temp_dir;
    use crate::cli::model::install_package_into_temp_dir;

    #[test(tokio::test)]
    async fn test_empty_list() -> Result<(), Error> {
        let (m, _temp_dir) = create_model_in_temp_dir().await?;
        {
            let local_domain = m.get_local_domain();
            let empty_output = model(local_domain).await?;
            assert!(empty_output.installed_packages_list.is_empty());
            assert_eq!(format!("{empty_output}"), "No installed packages");
        }
        Ok(())
    }

    /// Verifies that list model returns correct output for both empty and populated states:
    ///   * empty list shows "No installed packages" message
    ///   * after installing a package, shows the package namespace
    #[test(tokio::test)]
    async fn test_model() -> Result<(), Error> {
        // Test with one installed package
        let uri = format!("{}&path={}", pkg::URI, pkg::README_LK_ESCAPED);
        let (m, _, _temp_dir) = install_package_into_temp_dir(&uri).await?;
        {
            let local_domain = m.get_local_domain();
            let output = model(local_domain).await?;

            assert_eq!(
                output.installed_packages_list[0].namespace,
                pkg::NAMESPACE.into()
            );
            assert_eq!(
                format!("{output}"),
                format!("InstalledPackage<{}>", pkg::NAMESPACE_STR)
            );
        }

        Ok(())
    }

    /// Verifies that list command returns correct output after installing a package:
    ///   * shows the installed package namespace
    ///   * formats output according to display implementation
    // TODO: install and list multiple packages
    #[test(tokio::test)]
    async fn test_command_with_package() -> Result<(), Error> {
        let uri = format!("{}&path={}", pkg::URI, pkg::README_LK_ESCAPED);
        let (m, _, _temp_dir) = install_package_into_temp_dir(&uri).await?;

        if let Std::Out(output) = command(m).await {
            assert_eq!(output, format!("InstalledPackage<{}>", pkg::NAMESPACE_STR));
        } else {
            return Err(Error::Test("Failed to list packages".to_string()));
        }

        Ok(())
    }
}