// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.

//! `fabrica config check` and `fabrica config show`.

use std::path::Path;
use std::process::ExitCode;

use clap::Subcommand;

/// Actions under `fabrica config`.
#[derive(Debug, Subcommand)]
pub(crate) enum ConfigCommand {
    /// Validate the effective configuration and exit non-zero on any error.
    Check,
    /// Print the effective, merged configuration with secrets redacted.
    Show,
}

/// Dispatch a `config` subcommand.
///
/// Warnings are always written to stderr; on `check` they do not affect the exit
/// status. A validation failure is reported to stderr and yields
/// [`ExitCode::FAILURE`] without returning an `Err`, so no backtrace-style
/// wrapper is printed for the expected "your config is wrong" case.
pub(crate) fn run(
    command: &ConfigCommand,
    config_path: Option<&Path>,
    json: bool,
) -> anyhow::Result<ExitCode> {
    match command {
        ConfigCommand::Check => match config::load(config_path) {
            Ok(loaded) => {
                warn(&loaded.warnings);
                println!("configuration ok");
                Ok(ExitCode::SUCCESS)
            }
            Err(err) => {
                eprintln!("error: {err}");
                Ok(ExitCode::FAILURE)
            }
        },
        ConfigCommand::Show => {
            let loaded = config::load(config_path)?;
            warn(&loaded.warnings);
            if json {
                println!("{}", serde_json::to_string_pretty(&loaded.config)?);
            } else {
                print!("{}", loaded.config.to_toml_string()?);
            }
            Ok(ExitCode::SUCCESS)
        }
    }
}

/// Write each warning to stderr, prefixed, leaving stdout for real output.
fn warn(warnings: &[String]) {
    for warning in warnings {
        eprintln!("warning: {warning}");
    }
}