#![deny(clippy::wildcard_imports)]

use anyhow::Result;
use clap::Parser;

mod before_serve;
mod cli;
mod config;
mod docker;
mod doctor;
mod exec;
mod health;
mod home_assistant;
mod host_keys;
mod power;
mod pre_serve;
mod ssh;
mod tmux;

use crate::cli::{Cli, Commands};
use crate::config::{
    Cluster, Config, default_config_dir, resolve_cluster_for_recipe, select_cluster_by_name,
};
use crate::ssh::fetch_host_key;

/// Resolve the path to the config file.
///
/// Search order:
/// 1. `--config <path>` from CLI (always wins; error if missing)
/// 2. `./config.toml` in cwd
/// 3. `<default_config_dir>/config.toml`
///
/// Returns an error if nothing is found, with a hint pointing the user
/// to copy the example config to one of the two paths.
fn resolve_config_path(cli_config: &str) -> std::path::PathBuf {
    use std::path::PathBuf;
    let explicit = PathBuf::from(cli_config);
    // User passed a non-default path: use it as-is.
    if cli_config != "config.toml" {
        return explicit;
    }
    // Default value (or no flag): try cwd first, then default folder.
    if explicit.exists() {
        return explicit;
    }
    if let Some(dir) = default_config_dir() {
        let candidate = dir.join("config.toml");
        if candidate.exists() {
            return candidate;
        }
    }
    // Fall through; the loader will report a clean error.
    explicit
}

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

    let config_path = resolve_config_path(&cli.config);
    let raw_config = tokio::fs::read_to_string(&config_path).await?;
    let config: Config = toml::from_str(&raw_config)?;
    let dry_run = cli.dry_run;

    match cli.command {
        Commands::Serve {
            recipe,
            cluster,
            keep,
            skip_before_serve,
        } => {
            docker::serve(&config, &recipe, &cluster, keep, skip_before_serve, dry_run).await?;
        }
        Commands::Logs {
            recipe: recipe_name,
            follow,
        } => {
            let (cluster, _recipe) = resolve_cluster_for_recipe(&config, &recipe_name).await?;
            docker::show_logs(&config, &cluster, &recipe_name, follow, dry_run).await?;
        }
        Commands::Stop {
            recipe: recipe_name,
        } => {
            let (cluster, _recipe) = resolve_cluster_for_recipe(&config, &recipe_name).await?;
            docker::stop_cluster(&config, &cluster, &recipe_name, dry_run).await?;
        }
        Commands::Health {
            cluster: cluster_name,
            fingerprint,
        } => {
            if fingerprint {
                let clusters_to_check: Vec<Cluster> = match &cluster_name {
                    Some(name) => vec![select_cluster_by_name(&config, name)?],
                    None => config.clusters.clone(),
                };
                for cluster in &clusters_to_check {
                    println!("\n=== Кластер: {} ===", cluster.name);
                    for node in &cluster.nodes {
                        match fetch_host_key(&config, node).await {
                            Ok(fp) => {
                                println!("{} ({}) -> host_key = \"{}\"", node.name, node.ssh_ip, fp)
                            }
                            Err(e) => println!("{} ({}) -> error: {}", node.name, node.ssh_ip, e),
                        }
                    }
                }
            } else {
                match cluster_name {
                    Some(ref name) => {
                        let cluster = select_cluster_by_name(&config, name)?;
                        docker::health_check(&config, &cluster, dry_run).await?;
                    }
                    None => {
                        for cluster in &config.clusters {
                            docker::health_check(&config, cluster, dry_run).await?;
                        }
                    }
                }
            }
        }
        Commands::Doctor {
            recipe,
            cluster,
            repair,
        } => {
            doctor::doctor(&config, &recipe, &cluster, repair, dry_run).await?;
        }
        Commands::Tmux(tmux_cmd) => {
            crate::tmux::handle_tmux(&config, tmux_cmd, dry_run).await?;
        }
        Commands::InitHostKeys { cluster } => {
            host_keys::init_host_keys(
                &config,
                cluster.as_deref(),
                config_path.to_str().unwrap_or("config.toml"),
            )
            .await?;
        }
        Commands::Exec {
            cluster,
            recipe,
            node,
            alias,
            command,
        } => {
            let (cluster, _recipe) =
                exec::resolve_target(&config, cluster.as_deref(), recipe.as_deref()).await?;
            // Resolve command: alias takes precedence, otherwise join
            // the trailing positional args into a single command line.
            let cmd_str = exec::resolve_command(&config, alias.as_deref(), &command)?;
            exec::run(&config, &cluster, node.as_deref(), &cmd_str, dry_run).await?;
        }
        Commands::Power { action } => match action {
            cli::PowerAction::Off { cluster, node } => {
                let cluster = select_cluster_by_name(&config, &cluster)?;
                power::power_off(&config, &cluster, node.as_deref(), dry_run).await?;
            }
            cli::PowerAction::On { cluster, node } => {
                let cluster = select_cluster_by_name(&config, &cluster)?;
                power::power_on(&config, &cluster, node.as_deref(), dry_run).await?;
            }
            cli::PowerAction::Switch { from, to } => {
                let from = select_cluster_by_name(&config, &from)?;
                let to = select_cluster_by_name(&config, &to)?;
                power::power_switch(&config, &from, &to, dry_run).await?;
            }
        },
    }

    Ok(())
}