lenso-cli 0.4.1

mod authoring;
mod module;

use clap::{Args, Parser, Subcommand, ValueEnum};

/// Build, diagnose, and verify Lenso Modules and App Definitions.
#[derive(Debug, Parser)]
#[command(
    name = "lenso",
    version,
    about = "Build, diagnose, and verify Lenso Modules and App Definitions",
    propagate_version = true
)]
struct Cli {
    #[command(subcommand)]
    command: Command,
}

#[derive(Debug, Subcommand)]
enum Command {
    /// Create a new standalone Module project.
    New(ModuleCreateArgs),
    /// Start the Module development loop in the current project.
    Dev(ModuleDevArgs),
    /// Diagnose the current Module project with actionable checks.
    Check(ModuleCheckArgs),
    /// Prove Module behavior, lifecycle, composition, and removal.
    Verify(ModuleVerifyArgs),
    /// Check and resolve source-derived App Definitions.
    App {
        #[command(subcommand)]
        command: authoring::AppCommand,
    },
}

#[derive(Debug, Args, Clone)]
struct ModuleCreateArgs {
    /// Module id, such as billing or support.
    module_id: String,

    /// Base directory for the new standalone Module project.
    #[arg(long)]
    repo_root: Option<std::path::PathBuf>,

    /// Module implementation runtime.
    #[arg(long, value_enum, default_value_t = ModuleRuntimeArg::Rust)]
    runtime: ModuleRuntimeArg,

    /// High-value authoring recipe used to seed the Module card.
    #[arg(long, value_enum, default_value_t = ModuleRecipeArg::Stateless)]
    recipe: ModuleRecipeArg,

    /// New standalone Module project directory. Defaults to the Module id.
    #[arg(long)]
    dir: Option<std::path::PathBuf>,

    /// Skip dependency installation and compile checks after generation.
    #[arg(long)]
    no_install: bool,

    /// Capability id provided by the generated Module.
    #[arg(long)]
    capability: Option<String>,

    /// Print files without writing them.
    #[arg(long)]
    dry_run: bool,
}

#[derive(Clone, Copy, Debug, Eq, PartialEq, ValueEnum)]
enum ModuleRuntimeArg {
    Rust,
    Bun,
}

#[derive(Clone, Copy, Debug, Eq, PartialEq, ValueEnum)]
enum ModuleRecipeArg {
    Stateless,
    Stateful,
    WebConsole,
    ManagedWork,
}

#[derive(Debug, Args, Clone)]
struct ModuleDevArgs {
    /// Module repository root. Defaults to the current directory.
    #[arg(long)]
    repo_root: Option<std::path::PathBuf>,

    /// Authoring project document, relative to the Module repository root.
    #[arg(long, default_value = "lenso.json")]
    project: std::path::PathBuf,

    /// Bun executable used by the Execution Adapter when the project requires Bun.
    #[arg(long = "bun-bin", default_value = "bun")]
    bun_bin: String,
}

#[derive(Debug, Args, Clone)]
struct ModuleCheckArgs {
    /// Module repository root. Defaults to the current directory.
    #[arg(long)]
    repo_root: Option<std::path::PathBuf>,

    /// Authoring project document, relative to the Module repository root.
    #[arg(long, default_value = "lenso.json")]
    project: std::path::PathBuf,

    /// Emit the versioned authoring report as JSON.
    #[arg(long)]
    json: bool,
}

#[derive(Debug, Args, Clone)]
struct ModuleVerifyArgs {
    /// Module repository root. Defaults to the current directory.
    #[arg(long)]
    repo_root: Option<std::path::PathBuf>,

    /// Authoring project document, relative to the Module repository root.
    #[arg(long, default_value = "lenso.json")]
    project: std::path::PathBuf,

    /// Verify removal of this App-local Module Instance. Defaults to every Instance.
    #[arg(long = "module")]
    module_key: Option<String>,

    /// Behavior verification manifest, relative to the Module repository root.
    #[arg(long, default_value = "lenso.module.verify.json")]
    manifest: std::path::PathBuf,

    /// Write the versioned verification evidence to this path.
    #[arg(long, default_value = ".lenso/module-verification.json")]
    output: std::path::PathBuf,

    /// Emit the versioned verification evidence as JSON.
    #[arg(long)]
    json: bool,
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let cli = Cli::parse();

    match cli.command {
        Command::New(args) => create_module(args)?,
        Command::Dev(args) => dev_module(args).await?,
        Command::Check(args) => check_module(args)?,
        Command::Verify(args) => verify_module(args)?,
        Command::App { command } => authoring::app(command)?,
    }

    Ok(())
}

fn create_module(args: ModuleCreateArgs) -> anyhow::Result<()> {
    module::create_module(&module::ModuleCreateOptions {
        capability: args.capability,
        dir: args.dir,
        dry_run: args.dry_run,
        module_id: args.module_id,
        no_install: args.no_install,
        repo_root: args.repo_root,
        recipe: match args.recipe {
            ModuleRecipeArg::Stateless => module::ModuleRecipe::Stateless,
            ModuleRecipeArg::Stateful => module::ModuleRecipe::Stateful,
            ModuleRecipeArg::WebConsole => module::ModuleRecipe::WebConsole,
            ModuleRecipeArg::ManagedWork => module::ModuleRecipe::ManagedWork,
        },
        runtime: match args.runtime {
            ModuleRuntimeArg::Rust => module::ModuleRuntime::Rust,
            ModuleRuntimeArg::Bun => module::ModuleRuntime::Bun,
        },
    })
}

async fn dev_module(args: ModuleDevArgs) -> anyhow::Result<()> {
    authoring::dev_module(args.repo_root.as_deref(), &args.project, &args.bun_bin).await
}

fn check_module(args: ModuleCheckArgs) -> anyhow::Result<()> {
    authoring::check_module(&authoring::ModuleCheckOptions {
        json: args.json,
        project: args.project,
        repo_root: args.repo_root,
    })
}

fn verify_module(args: ModuleVerifyArgs) -> anyhow::Result<()> {
    authoring::verify_module(authoring::ModuleVerifyOptions {
        json: args.json,
        manifest: args.manifest,
        module_key: args.module_key,
        output: args.output,
        project: args.project,
        repo_root: args.repo_root,
    })
}

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

    #[test]
    fn command_tree_is_valid() {
        Cli::command().debug_assert();
    }

    #[test]
    fn only_intent_level_commands_are_public() {
        let command = Cli::command();
        let names = command
            .get_subcommands()
            .map(clap::Command::get_name)
            .collect::<Vec<_>>();
        assert_eq!(names, ["new", "dev", "check", "verify", "app"]);

        let app = command
            .get_subcommands()
            .find(|subcommand| subcommand.get_name() == "app")
            .expect("app command");
        let app_names = app
            .get_subcommands()
            .map(clap::Command::get_name)
            .collect::<Vec<_>>();
        assert_eq!(app_names, ["add", "remove", "check", "resolve"]);
    }
}