pass-ssh-unpack 0.1.3

mod cli;
mod config;
mod error;
mod platform;
mod proton_pass;
mod rclone;
mod ssh;

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

use cli::Args;
use config::Config;
use error::ErrorCollector;
use proton_pass::ProtonPass;
use rclone::RcloneEntry;
use ssh::SshManager;

fn main() {
    if let Err(e) = run() {
        eprintln!("Error: {:#}", e);
        std::process::exit(1);
    }
}

fn run() -> Result<()> {
    let args = Args::parse();
    let mut errors = ErrorCollector::new();
    let dry_run = args.dry_run;

    // Load or create config
    let config_path = args.config.clone().unwrap_or_else(Config::default_path);
    let config = Config::load_or_create(&args.config)?;

    // Helper for logging
    let log = |msg: &str| {
        if !args.quiet {
            println!("{}", msg);
        }
    };

    // Check for missing config options and warn user
    if config_path.exists() {
        let missing = config::check_missing_options(&config_path);
        if !missing.is_empty() && !args.quiet {
            eprintln!(
                "Warning: Your config is missing new options: {}",
                missing.join(", ")
            );
            eprintln!(
                "  Consider regenerating with: rm {:?} && pass-ssh-unpack",
                config_path
            );
            eprintln!();
        }
    }

    if dry_run {
        log("[DRY RUN] No changes will be made");
        log("");
    }

    // Check dependencies
    check_dependencies()?;

    // Handle purge mode
    if args.purge {
        return handle_purge(&config, dry_run, &log);
    }

    log("Extracting SSH keys from Proton Pass...");
    log("");

    // Get current hostname for machine-specific filtering
    let current_hostname = platform::get_hostname();

    // Setup SSH manager
    let ssh_output_dir = config.expanded_ssh_output_dir();
    let mut ssh_manager = SshManager::new(
        &ssh_output_dir,
        args.full,
        dry_run,
        config.sync_public_key.clone(),
    )?;

    // Get vaults to process
    let proton_pass = ProtonPass::new();
    let all_vaults = proton_pass.list_vaults()?;

    // Apply vault filters (CLI overrides config defaults)
    let vault_patterns = if args.vault.is_empty() {
        &config.default_vaults
    } else {
        &args.vault
    };

    let vaults_to_process = filter_by_patterns(&all_vaults, vault_patterns);

    if vaults_to_process.is_empty() && !vault_patterns.is_empty() {
        log("Warning: No vaults matched the specified patterns");
    }

    // Apply item filters (CLI overrides config defaults)
    let item_patterns = if args.item.is_empty() {
        &config.default_items
    } else {
        &args.item
    };

    // Collect rclone entries for later sync
    let mut rclone_entries: Vec<RcloneEntry> = Vec::new();

    // Process each vault
    for vault in &vaults_to_process {
        log(&format!("[{}]", vault));

        let items = match proton_pass.list_ssh_keys(vault) {
            Ok(items) => items,
            Err(e) => {
                errors.add(&format!("Failed to list SSH keys in vault '{}'", vault), e);
                log("  (error listing keys)");
                log("");
                continue;
            }
        };

        if items.is_empty() {
            log("  (no SSH keys)");
            log("");
            continue;
        }

        for item in items {
            // Filter by item patterns
            if !matches_any_pattern(&item.title, item_patterns) {
                continue;
            }

            // Check machine-specific suffix
            if let Some(suffix) = item.title.split('/').last() {
                if item.title.contains('/') {
                    let suffix_lower = suffix.to_lowercase();
                    if suffix_lower != current_hostname.to_lowercase() {
                        log(&format!(
                            "  Skipping: {} (not for this machine)",
                            item.title
                        ));
                        continue;
                    }
                }
            }

            log(&format!("  Processing: {}", item.title));

            // Extract and process the SSH key
            match ssh_manager.process_item(&proton_pass, vault, &item, &log) {
                Ok(entry) => {
                    if let Some(rclone_entry) = entry {
                        rclone_entries.push(rclone_entry);
                    }
                }
                Err(e) => {
                    errors.add(&format!("Failed to process '{}'", item.title), e);
                }
            }
        }

        log("");
    }

    // Generate SSH config
    log("Generating SSH config...");
    let (primary_count, alias_count, pruned_count) = ssh_manager.write_config()?;

    log("");
    log(&format!(
        "Done! Generated config has {} hosts and {} aliases.",
        primary_count, alias_count
    ));
    if pruned_count > 0 {
        log(&format!("Pruned {} orphaned entries.", pruned_count));
    }
    log(&format!(
        "SSH config written to: {}",
        ssh_manager.config_path().display()
    ));

    // Sync rclone remotes
    if !args.no_rclone && config.rclone.enabled {
        if let Err(e) = rclone::sync_remotes(&rclone_entries, &config, args.full, dry_run, &log) {
            errors.add("Rclone sync", e);
        }
    }

    // Report any collected errors
    errors.report();

    if errors.has_errors() {
        std::process::exit(1);
    }

    Ok(())
}

fn check_dependencies() -> Result<()> {
    use anyhow::bail;

    if which::which("pass-cli").is_err() {
        bail!("pass-cli not found. Install Proton Pass CLI first.");
    }

    // Check if logged in
    let output = std::process::Command::new("pass-cli")
        .arg("info")
        .output()?;

    if !output.status.success() {
        bail!("Not logged into Proton Pass. Run 'pass-cli login' first.");
    }

    if which::which("ssh-keygen").is_err() {
        bail!("ssh-keygen not found. Install OpenSSH first.");
    }

    Ok(())
}

fn handle_purge(config: &Config, dry_run: bool, log: &impl Fn(&str)) -> Result<()> {
    log("Purging all managed SSH keys and rclone remotes...");

    // Delete SSH keys folder
    let ssh_dir = config.expanded_ssh_output_dir();
    if ssh_dir.exists() {
        if dry_run {
            log(&format!("  Would remove {}", ssh_dir.display()));
        } else {
            std::fs::remove_dir_all(&ssh_dir)?;
            log(&format!("  Removed {}", ssh_dir.display()));
        }
    } else {
        log(&format!("  {} does not exist", ssh_dir.display()));
    }

    // Delete managed rclone remotes
    rclone::purge_managed_remotes(config, dry_run, log)?;

    log("Done.");
    Ok(())
}

fn filter_by_patterns(items: &[String], patterns: &[String]) -> Vec<String> {
    if patterns.is_empty() {
        return items.to_vec();
    }

    items
        .iter()
        .filter(|item| matches_any_pattern(item, patterns))
        .cloned()
        .collect()
}

fn matches_any_pattern(item: &str, patterns: &[String]) -> bool {
    if patterns.is_empty() {
        return true;
    }

    for pattern in patterns {
        if let Ok(glob_pattern) = glob::Pattern::new(pattern) {
            if glob_pattern.matches(item) {
                return true;
            }
        }
    }

    false
}