tsafe-cli 1.0.27

//! Shared helper functions for all CLI command handlers.
//!
//! Vault open strategies, password prompting, clipboard management, tag
//! parsing, and interactive onboarding flows are centralised here so the
//! top-level `main.rs` stays focused on dispatch.

use std::collections::HashMap;
use std::io::{self, BufRead, IsTerminal, Write};

use anyhow::{Context, Result};
use chrono::Utc;
use colored::Colorize;

use tsafe_core::{
    audit::{AuditEntry, AuditLog},
    env as tsenv,
    errors::SafeError,
    events::emit_event,
    keyring_store, profile,
    rbac::RbacProfile,
    vault::Vault,
};

// ── Password prompting ────────────────────────────────────────────────────────

pub fn prompt_password(prompt: &str) -> Result<String> {
    // Non-interactive path: TSAFE_PASSWORD env var (CI / agent / scripted use).
    if let Ok(pw) = std::env::var("TSAFE_PASSWORD") {
        return Ok(pw);
    }
    // No TTY and no env var — fail fast rather than hanging on a read that will
    // never come.  This is the case when a process (agent, pipeline step) calls
    // tsafe without setting TSAFE_PASSWORD.
    use std::io::IsTerminal;
    if !std::io::stdin().is_terminal() {
        anyhow::bail!(
            "no TTY detected and TSAFE_PASSWORD is not set.\n\
             For non-interactive use set TSAFE_PASSWORD in the process environment:\n\
             \n  $env:TSAFE_PASSWORD = \"<vault password>\"   # PowerShell\n\
               export TSAFE_PASSWORD=\"<vault password>\"     # bash\n\
             \nTo create a new vault non-interactively:\n\
             \n  $env:TSAFE_PASSWORD = \"<new password>\"; tsafe init"
        );
    }
    rpassword::prompt_password(prompt).context("failed to read password from terminal")
}

pub fn prompt_password_confirmed() -> Result<String> {
    // When using the env-var path (non-interactive), skip the confirmation prompt;
    // there is no human typing who could mistype.
    if std::env::var("TSAFE_PASSWORD").is_ok() {
        return prompt_password("New vault password: ");
    }
    let pw1 = prompt_password("New vault password: ")?;
    let pw2 = prompt_password("Confirm password:   ")?;
    if pw1 != pw2 {
        anyhow::bail!("passwords do not match");
    }
    Ok(pw1)
}

fn quick_unlock_cooldown_path(profile_name: &str) -> std::path::PathBuf {
    profile::app_state_dir()
        .join("quick-unlock-cooldown")
        .join(format!("{profile_name}.txt"))
}

#[allow(dead_code)] // used in non-biometric builds
fn quick_unlock_retry_blocked(profile_name: &str) -> bool {
    if !profile::get_auto_quick_unlock() {
        return true;
    }
    let path = quick_unlock_cooldown_path(profile_name);
    let Ok(raw) = std::fs::read_to_string(&path) else {
        return false;
    };
    let Ok(until_epoch) = raw.trim().parse::<i64>() else {
        let _ = std::fs::remove_file(path);
        return false;
    };
    let now_epoch = Utc::now().timestamp();
    if now_epoch < until_epoch {
        return true;
    }
    let _ = std::fs::remove_file(path);
    false
}

fn note_quick_unlock_retry_cooldown(profile_name: &str) {
    let seconds = profile::get_quick_unlock_retry_cooldown_secs();
    if seconds == 0 {
        return;
    }
    let path = quick_unlock_cooldown_path(profile_name);
    if let Some(parent) = path.parent() {
        let _ = std::fs::create_dir_all(parent);
    }
    let until_epoch = Utc::now().timestamp() + seconds as i64;
    let _ = std::fs::write(path, until_epoch.to_string());
}

fn clear_quick_unlock_retry_cooldown(profile_name: &str) {
    let _ = std::fs::remove_file(quick_unlock_cooldown_path(profile_name));
}

#[allow(dead_code)] // used in non-biometric builds
fn try_auto_quick_unlock_password(profile_name: &str) -> Option<String> {
    if quick_unlock_retry_blocked(profile_name) {
        return None;
    }
    match keyring_store::retrieve_password(profile_name) {
        Ok(Some(pw)) => {
            clear_quick_unlock_retry_cooldown(profile_name);
            Some(pw.trim_end_matches(['\n', '\r']).to_string())
        }
        Ok(None) => {
            clear_quick_unlock_retry_cooldown(profile_name);
            None
        }
        Err(_) => {
            note_quick_unlock_retry_cooldown(profile_name);
            None
        }
    }
}

// ── Vault open strategies ─────────────────────────────────────────────────────

pub fn open_vault(profile: &str) -> Result<Vault> {
    open_vault_with_access_profile(profile, RbacProfile::ReadWrite)
}

pub fn open_vault_with_access_profile(profile: &str, access_profile: RbacProfile) -> Result<Vault> {
    profile::validate_profile_name(profile)?;
    let path = profile::vault_path(profile);
    if !path.exists() {
        if !access_profile.allows_write() {
            anyhow::bail!("vault not found: {}", path.display());
        }
        return first_run_create_vault(profile, &path);
    }

    // ── Team vault path: use age identity instead of password ────────────────
    if Vault::is_team_vault(&path) {
        return open_team_vault_with_access_profile(profile, &path, access_profile);
    }

    if let Ok(password) = std::env::var("TSAFE_PASSWORD") {
        return Vault::open_with_access_profile(&path, password.as_bytes(), access_profile)
            .map_err(|e| match e {
                SafeError::DecryptionFailed => {
                    anyhow::anyhow!("wrong password for profile '{profile}' from TSAFE_PASSWORD")
                }
                other => anyhow::anyhow!("{other}"),
            });
    }

    // Try the background agent first (no interactive prompt needed).
    if let Ok(Some(pw)) = tsafe_core::agent::request_password_from_agent(profile) {
        return Vault::open_with_access_profile(&path, pw.as_bytes(), access_profile).map_err(
            |e| match e {
                SafeError::DecryptionFailed => {
                    anyhow::anyhow!("agent provided wrong password for '{profile}'")
                }
                other => anyhow::anyhow!("{other}"),
            },
        );
    }
    // Try the main vault's profile-passwords namespace (master-password bridging).
    if let Some(pw) = get_password_from_main(profile) {
        return Vault::open_with_access_profile(&path, pw.as_bytes(), access_profile).map_err(
            |e| match e {
                SafeError::DecryptionFailed => anyhow::anyhow!(
                    "main vault has a password stored for '{profile}' but it is wrong — \
                     update it with: tsafe -p main set profile-passwords/{profile} <new-password>"
                ),
                other => anyhow::anyhow!("{other}"),
            },
        );
    }
    // ── E4.1: Windows Hello challenge before keyring read ───────────────────
    #[cfg(all(windows, feature = "biometric"))]
    {
        use crate::windows_hello::{request_windows_hello_verification, BiometricChallengeError};
        match request_windows_hello_verification("tsafe vault unlock") {
            Ok(true) | Err(BiometricChallengeError::NoWindowHandle)
            | Err(BiometricChallengeError::NotEnrolled)
            | Err(BiometricChallengeError::NotConfigured) => {
                // Proceed — challenge passed or not available on this device
            }
            Ok(false) => {
                anyhow::bail!("Windows Hello verification denied for '{profile}'")
            }
            Err(BiometricChallengeError::Canceled) => {
                anyhow::bail!("Windows Hello verification canceled for '{profile}'")
            }
            Err(e) => {
                eprintln!("{} Windows Hello challenge failed ({e}) — proceeding without challenge", "warn:".yellow());
            }
        }
    }

    // Try OS credential store (biometric / keyring unlock).
    #[cfg(feature = "biometric")]
    if let Some(pw) = crate::cmd_biometric::retrieve_biometric_password(profile)
        .ok()
        .flatten()
    {
        let pw_str = pw.trim_end_matches(['\n', '\r']).to_string();
        match Vault::open_with_access_profile(&path, pw_str.as_bytes(), access_profile) {
            Ok(v) => {
                clear_quick_unlock_retry_cooldown(profile);
                return Ok(v);
            }
            Err(SafeError::DecryptionFailed) => {
                note_quick_unlock_retry_cooldown(profile);
                // Warn about stale credential per ADR-016, but fall through to
                // the interactive password prompt so the user can still access
                // their vault with the master password and then re-enroll.
                let stale = crate::cmd_biometric::classify_biometric_unlock_error(
                    SafeError::DecryptionFailed,
                );
                eprintln!("{} {stale}", "warn:".yellow());
                eprintln!(
                    "{} After logging in, run: tsafe biometric re-enroll",
                    "hint:".cyan()
                );
                // Fall through to interactive prompt below.
            }
            Err(other) => return Err(anyhow::anyhow!("{other}")),
        }
    }
    #[cfg(not(feature = "biometric"))]
    if let Some(pw) = try_auto_quick_unlock_password(profile) {
        match Vault::open_with_access_profile(&path, pw.as_bytes(), access_profile) {
            Ok(v) => {
                clear_quick_unlock_retry_cooldown(profile);
                return Ok(v);
            }
            Err(SafeError::DecryptionFailed) => {
                note_quick_unlock_retry_cooldown(profile);
                eprintln!(
                    "{} Stored keyring password for '{}' is outdated — falling back to prompt.",
                    "warn:".yellow(),
                    profile
                );
                // Fall through to interactive prompt.
            }
            Err(other) => return Err(anyhow::anyhow!("{other}")),
        }
    }
    let password = prompt_password(&format!("Password for profile '{profile}': "))?;
    let vault =
        Vault::open_with_access_profile(&path, password.as_bytes(), access_profile).map_err(
            |e| match e {
                SafeError::DecryptionFailed => anyhow::anyhow!(
                    "wrong password for profile '{profile}'\n\
                     \n  If you use quick unlock, check its status: tsafe biometric status\
                     \n  To reset the stored password:            tsafe biometric disable && tsafe biometric enable\
                     \n  If you forgot the master password, see:  tsafe explain vault-recovery"
                ),
                other => anyhow::anyhow!("{other}"),
            },
        )?;
    // Only persist to the keyring when the password was typed interactively.
    // If it came from the TSAFE_PASSWORD env var (CI / scripted use) we must not
    // cache it — doing so would let subsequent calls bypass a changed env var.
    if std::env::var("TSAFE_PASSWORD").is_err() {
        tsafe_core::keyring_store::store_password(profile, &password).ok();
    }
    Ok(vault)
}

#[allow(dead_code)] // utility for agent / MCP callers
pub fn open_vault_noninteractive(profile: &str) -> Result<Option<Vault>> {
    open_vault_noninteractive_with_access_profile(profile, RbacProfile::ReadWrite)
}

#[allow(dead_code)] // utility for agent / MCP callers
pub fn open_vault_noninteractive_with_access_profile(
    profile: &str,
    access_profile: RbacProfile,
) -> Result<Option<Vault>> {
    profile::validate_profile_name(profile)?;
    let path = profile::vault_path(profile);
    if !path.exists() {
        return Ok(None);
    }

    if Vault::is_team_vault(&path) {
        return open_team_vault_with_access_profile(profile, &path, access_profile).map(Some);
    }

    if let Ok(password) = std::env::var("TSAFE_PASSWORD") {
        return match Vault::open_with_access_profile(&path, password.as_bytes(), access_profile) {
            Ok(vault) => Ok(Some(vault)),
            Err(SafeError::DecryptionFailed) => Ok(None),
            Err(other) => Err(anyhow::anyhow!("{other}")),
        };
    }

    if let Ok(Some(pw)) = tsafe_core::agent::request_password_from_agent(profile) {
        return match Vault::open_with_access_profile(&path, pw.as_bytes(), access_profile) {
            Ok(vault) => Ok(Some(vault)),
            Err(SafeError::DecryptionFailed) => Ok(None),
            Err(other) => Err(anyhow::anyhow!("{other}")),
        };
    }
    if let Some(pw) = get_password_from_main(profile) {
        return match Vault::open_with_access_profile(&path, pw.as_bytes(), access_profile) {
            Ok(vault) => Ok(Some(vault)),
            Err(SafeError::DecryptionFailed) => Ok(None),
            Err(other) => Err(anyhow::anyhow!("{other}")),
        };
    }
    Ok(None)
}

/// Try to retrieve the vault password for `profile` from the `main` vault's
/// `profile-passwords/<profile>` entry.
///
/// Opens `main` non-interactively only (agent then TSAFE_PASSWORD env var).
/// Returns `None` if:
/// - `profile` is "main" (avoids recursion)
/// - the main vault does not exist
/// - main cannot be opened non-interactively
/// - the key is absent from main
pub fn get_password_from_main(profile: &str) -> Option<String> {
    if profile == "main" {
        return None;
    }
    let main_path = profile::vault_path("main");
    if !main_path.exists() {
        return None;
    }
    // Open main vault non-interactively: agent first, then TSAFE_PASSWORD.
    let main_pw: String =
        if let Ok(Some(pw)) = tsafe_core::agent::request_password_from_agent("main") {
            pw.to_string()
        } else if let Ok(pw) = std::env::var("TSAFE_PASSWORD") {
            pw
        } else {
            return None;
        };
    let main_vault = Vault::open(&main_path, main_pw.as_bytes()).ok()?;
    let key = format!("profile-passwords/{profile}");
    main_vault.get(&key).ok().map(|z| z.to_string())
}

/// Open an existing vault to write `profile-passwords/<child>` during init
/// (no auto-create, no keyring write side effects).
pub fn open_vault_for_backup(target_profile: &str) -> Result<Vault> {
    profile::validate_profile_name(target_profile)?;
    let path = profile::vault_path(target_profile);
    if !path.exists() {
        anyhow::bail!("vault for profile '{target_profile}' does not exist");
    }
    if Vault::is_team_vault(&path) {
        return open_team_vault_with_access_profile(target_profile, &path, RbacProfile::ReadWrite);
    }
    if let Ok(password) = std::env::var("TSAFE_PASSWORD") {
        return Vault::open_with_access_profile(&path, password.as_bytes(), RbacProfile::ReadWrite)
            .map_err(|e| anyhow::anyhow!("{e}"));
    }
    if let Ok(Some(pw)) = tsafe_core::agent::request_password_from_agent(target_profile) {
        return Vault::open_with_access_profile(&path, pw.as_bytes(), RbacProfile::ReadWrite)
            .map_err(|e| anyhow::anyhow!("{e}"));
    }
    if let Some(pw) = get_password_from_main(target_profile) {
        return Vault::open_with_access_profile(&path, pw.as_bytes(), RbacProfile::ReadWrite)
            .map_err(|e| anyhow::anyhow!("{e}"));
    }
    use std::io::IsTerminal;
    if std::io::stdin().is_terminal() && std::env::var("TSAFE_PASSWORD").is_err() {
        let password = prompt_password(&format!(
            "Password for '{target_profile}' vault (to store backup of the new profile's master password): "
        ))?;
        return Vault::open_with_access_profile(&path, password.as_bytes(), RbacProfile::ReadWrite)
            .map_err(|e| match e {
                SafeError::DecryptionFailed => anyhow::anyhow!("wrong password"),
                other => anyhow::anyhow!("{other}"),
            });
    }
    anyhow::bail!(
        "could not open backup vault '{target_profile}' non-interactively — unlock it first \
         (e.g. `tsafe agent unlock --profile {target_profile}`)"
    )
}

/// If `backup_new_profile_passwords_to` is set in config, copy the new vault
/// password into that vault.
pub fn backup_new_profile_password_if_configured(
    created_profile: &str,
    new_password: &str,
) -> Result<()> {
    let Some(target) = profile::get_backup_new_profile_passwords_to() else {
        return Ok(());
    };
    if target == created_profile {
        return Ok(());
    }
    profile::validate_profile_name(&target).map_err(|e| anyhow::anyhow!("{e}"))?;
    if !profile::vault_path(&target).exists() {
        eprintln!(
            "{} Config expects master-password backups in '{}' but that vault does not exist yet — skipping backup.",
            "warn:".yellow().bold(),
            target
        );
        eprintln!("  Create it with: tsafe --profile {target} init");
        return Ok(());
    }
    let mut v = match open_vault_for_backup(&target) {
        Ok(v) => v,
        Err(e) => {
            eprintln!(
                "{} Could not open backup vault '{}' to store the new profile password: {:#}",
                "warn:".yellow().bold(),
                target,
                e
            );
            eprintln!(
                "  After '{target}' is unlocked, add the password with: tsafe --profile {target} set profile-passwords/{created_profile}"
            );
            return Ok(());
        }
    };
    let key = format!("profile-passwords/{created_profile}");
    v.set(&key, new_password, HashMap::new())
        .map_err(|e| anyhow::anyhow!("{e}"))?;
    v.save().map_err(|e| anyhow::anyhow!("{e}"))?;
    audit(&target)
        .append(&AuditEntry::success(&target, "set", Some(&key)))
        .ok();
    println!(
        "{} Also saved master password for '{}' under {} in the '{}' vault \
         (config: backup_new_profile_passwords_to).",
        "✓".green(),
        created_profile,
        key,
        target
    );
    println!("  Keep that vault strictly protected — it can unlock other profiles via bridging.");
    Ok(())
}

pub fn open_team_vault_with_access_profile(
    profile: &str,
    path: &std::path::Path,
    access_profile: RbacProfile,
) -> Result<Vault> {
    use tsafe_core::{age_crypto, team};

    let identity_path = profile::resolve_age_identity_path(profile);

    if !identity_path.exists() {
        anyhow::bail!(
            "Team vault detected but no age identity found at {}\n\
             Generate one with: tsafe --profile {profile} team keygen\n\
             Or set TSAFE_AGE_IDENTITY to your identity file.",
            identity_path.display()
        );
    }

    let identities = age_crypto::load_identities(&identity_path)
        .map_err(|e| anyhow::anyhow!("failed to load age identity: {e}"))?;

    // Read the vault file to unwrap the DEK.
    let json = std::fs::read_to_string(path)?;
    let file: tsafe_core::vault::VaultFile = serde_json::from_str(&json)?;
    let dek = team::unwrap_dek(&file, &identities).map_err(|e| {
        anyhow::anyhow!("cannot decrypt team vault — your identity may not be a member: {e}")
    })?;

    Vault::open_with_key_with_access_profile(path, dek, access_profile)
        .map_err(|e| anyhow::anyhow!("{e}"))
}

/// Called when the vault for `profile` doesn't exist yet.
///
/// - If `TSAFE_PASSWORD` is set (non-interactive / scripted): auto-create silently.
/// - If on a TTY: ask the user whether to create it now.
/// - If no TTY and no `TSAFE_PASSWORD`: fail fast with a clear message.
pub fn first_run_create_vault(profile: &str, path: &std::path::Path) -> Result<Vault> {
    // Non-interactive path — password is available, just create the vault.
    if std::env::var("TSAFE_PASSWORD").is_ok() {
        let password = prompt_password("")?; // returns env var immediately
        let vault = Vault::create(path, password.as_bytes()).context("failed to create vault")?;
        audit(profile)
            .append(&AuditEntry::success(profile, "init", None))
            .ok();
        emit_event(profile, "init", None);
        eprintln!("{} Vault for profile '{profile}' created.", "✓".green());
        backup_new_profile_password_if_configured(profile, &password)?;
        return Ok(vault);
    }

    eprintln!("{} No vault found for profile '{profile}'.", "i".blue());

    if !io::stdin().is_terminal() {
        anyhow::bail!("Vault not created. Run `tsafe --profile {profile} init` to set up.");
    }

    use inquire::Confirm;
    let confirmed = Confirm::new("Create it now?")
        .with_default(true)
        .prompt()
        .unwrap_or(false);
    if !confirmed {
        anyhow::bail!("Vault not created. Run `tsafe --profile {profile} init` to set up.");
    }

    let password = prompt_password_confirmed()?;
    let vault = Vault::create(path, password.as_bytes()).context("failed to create vault")?;
    audit(profile)
        .append(&AuditEntry::success(profile, "init", None))
        .ok();
    emit_event(profile, "init", None);
    eprintln!("{} Vault for profile '{profile}' created.", "✓".green());
    backup_new_profile_password_if_configured(profile, &password)?;
    onboarding_biometric_unlock(profile, &password)?;
    Ok(vault)
}

// ── Small shared utilities ────────────────────────────────────────────────────

/// Return the audit log handle for `profile`.
pub fn audit(profile: &str) -> AuditLog {
    AuditLog::new(&profile::audit_log_path(profile))
}

/// Parse `["env=prod", "team=backend"]` → `[("env","prod"), ("team","backend")]`.
pub fn parse_tag_filters(filters: &[String]) -> Vec<(&str, &str)> {
    filters
        .iter()
        .filter_map(|f| {
            let mut parts = f.splitn(2, '=');
            Some((parts.next()?, parts.next()?))
        })
        .collect()
}

/// Parse tag args into an owned map for `vault.set()`.
pub fn parse_tags_map(tags: &[String]) -> HashMap<String, String> {
    tags.iter()
        .filter_map(|t| {
            let mut p = t.splitn(2, '=');
            Some((p.next()?.to_string(), p.next()?.to_string()))
        })
        .collect()
}

/// Emit a stderr warning if `key` carries an `expires` tag that is past or within 30 days.
pub fn warn_if_expired(key: &str, tags: &HashMap<String, String>) {
    if let Some(exp) = tags.get("expires") {
        if let Ok(date) = chrono::NaiveDate::parse_from_str(exp, "%Y-%m-%d") {
            let today = Utc::now().date_naive();
            if date < today {
                eprintln!(
                    "{} '{}' expired on {} (tag expires={})",
                    "warn:".yellow().bold(),
                    key,
                    exp,
                    exp
                );
            } else {
                let days = (date - today).num_days();
                if days <= 30 {
                    eprintln!(
                        "{} '{}' expires in {} day(s) on {}",
                        "warn:".yellow().bold(),
                        key,
                        days,
                        exp
                    );
                }
            }
        }
    }
}

/// Copy `value` to the system clipboard and spawn a background thread that
/// clears the clipboard after 30 seconds.
pub fn set_clipboard(value: &str) -> Result<()> {
    // Use platform clipboard tool: clip.exe on Windows.
    #[cfg(target_os = "windows")]
    {
        let mut child = std::process::Command::new("clip")
            .stdin(std::process::Stdio::piped())
            .spawn()
            .context("could not launch clip.exe — clipboard unavailable")?;
        if let Some(mut stdin) = child.stdin.take() {
            stdin.write_all(value.as_bytes()).ok();
        }
        child.wait().ok();
    }
    #[cfg(target_os = "macos")]
    {
        let mut child = std::process::Command::new("pbcopy")
            .stdin(std::process::Stdio::piped())
            .spawn()
            .context("could not launch pbcopy — clipboard unavailable")?;
        if let Some(mut stdin) = child.stdin.take() {
            stdin.write_all(value.as_bytes()).ok();
        }
        child.wait().ok();
    }
    #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
    {
        // xclip fallback on Linux.
        let mut child = std::process::Command::new("xclip")
            .args(["-selection", "clipboard"])
            .stdin(std::process::Stdio::piped())
            .spawn()
            .context("could not launch xclip — install xclip or copy manually")?;
        if let Some(mut stdin) = child.stdin.take() {
            stdin.write_all(value.as_bytes()).ok();
        }
        child.wait().ok();
    }

    // Spawn a background thread to clear clipboard after 30 s.
    std::thread::spawn(|| {
        std::thread::sleep(std::time::Duration::from_secs(30));
        #[cfg(target_os = "windows")]
        {
            let _ = std::process::Command::new("cmd")
                .args(["/c", "echo off | clip"])
                .status();
        }
        #[cfg(target_os = "macos")]
        {
            // Direct pipe — no shell wrapper, no injection risk.
            if let Ok(mut child) = std::process::Command::new("pbcopy")
                .stdin(std::process::Stdio::piped())
                .spawn()
            {
                drop(child.stdin.take()); // send EOF → clears clipboard
                let _ = child.wait();
            }
        }
        #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
        {
            // Direct pipe — no shell wrapper.
            if let Ok(mut child) = std::process::Command::new("xclip")
                .args(["-selection", "clipboard"])
                .stdin(std::process::Stdio::piped())
                .spawn()
            {
                drop(child.stdin.take());
                let _ = child.wait();
            }
        }
    });

    Ok(())
}

// ── Onboarding helpers ────────────────────────────────────────────────────────

/// When to show the OS keychain prompt for the **vault master password**
/// (not individual secrets).
#[derive(Clone, Copy)]
pub enum MasterPasswordKeychainPrompt {
    /// After `tsafe init` / first vault — skip if keyring already has this profile.
    NewVault,
    /// After `tsafe rotate` — offer to replace the stored password so quick unlock stays valid.
    AfterRotate,
}

/// Offer saving the vault master password to the OS credential store
/// (Touch ID / Hello / PIN).
pub fn offer_os_keychain_for_master_password(
    profile: &str,
    password: &str,
    ctx: MasterPasswordKeychainPrompt,
) -> Result<()> {
    use std::io::IsTerminal;

    if std::env::var("TSAFE_PASSWORD").is_ok() || !std::io::stdin().is_terminal() {
        return Ok(());
    }
    match ctx {
        MasterPasswordKeychainPrompt::NewVault => {
            if keyring_store::has_password(profile) {
                return Ok(());
            }
        }
        MasterPasswordKeychainPrompt::AfterRotate => {
            if std::env::var("TSAFE_NEW_MASTER_PASSWORD").is_ok() {
                return Ok(());
            }
        }
    }

    let store_ok = keyring_store::probe_credential_store().is_ok();

    println!();
    if store_ok {
        match ctx {
            MasterPasswordKeychainPrompt::NewVault => {
                println!("{}", "Quick unlock — recommended".cyan().bold());
                println!(
                    "  Store your master password in this device's OS credential store so you can unlock \
                     with Touch ID, Face ID, Windows Hello, or your device PIN — without typing it every time."
                );
            }
            MasterPasswordKeychainPrompt::AfterRotate => {
                println!("{}", "Update OS keychain for quick unlock".cyan().bold());
                println!(
                    "  Your vault master password just changed. Save the new password to the OS credential store \
                     so Touch ID / empty-password unlock keeps working? (Any old stored password no longer matches.)"
                );
            }
        }
        println!(
            "  You can change this later with `tsafe biometric disable` or `tsafe biometric enable`."
        );
        println!();

        for attempt in 0..4 {
            if attempt > 0 {
                eprint!("  Please answer Y, n, or l. ");
            }
            eprint!(
                "{} [Y] Set up now   [n] Not now   [l] Later: ",
                "→".cyan().bold()
            );
            io::stderr().flush().ok();
            let mut line = String::new();
            let n = io::stdin().lock().read_line(&mut line)?;
            if n == 0 {
                println!();
                println!("  When you're ready: tsafe --profile {profile} biometric enable");
                return Ok(());
            }
            match parse_onboarding_biometric_choice(line.as_str()) {
                Some('y') => {
                    keyring_store::store_password(profile, password)
                        .map_err(|e| anyhow::anyhow!("{e}"))?;
                    println!();
                    println!(
                        "{} Master password saved for quick unlock (profile '{}').",
                        "✓".green(),
                        profile
                    );
                    println!(
                        "  Leave the password empty when prompted (CLI or TUI) to use OS unlock, \
                         or run `tsafe biometric status`."
                    );
                    return Ok(());
                }
                Some('n') => {
                    println!();
                    println!(
                        "  Understood — you'll enter your master password when unlocking the vault."
                    );
                    println!(
                        "  To enable quick unlock later: tsafe --profile {profile} biometric enable"
                    );
                    return Ok(());
                }
                Some('l') => {
                    println!();
                    println!("  No problem — enable it when you're ready.");
                    println!("  tsafe --profile {profile} biometric enable");
                    return Ok(());
                }
                Some(_) | None => continue,
            }
        }
        println!();
        println!("  To enable quick unlock later: tsafe --profile {profile} biometric enable");
        return Ok(());
    }

    println!("{}", "Quick unlock".cyan().bold());
    println!(
        "  This environment doesn't appear to have a working OS credential store \
         (common over SSH or in CI)."
    );
    println!(
        "  On this machine with a desktop session, run: {}",
        format!("tsafe --profile {profile} biometric enable").cyan()
    );
    println!();
    Ok(())
}

/// After creating a vault on an interactive terminal, offer OS credential / quick unlock setup.
pub fn onboarding_biometric_unlock(profile: &str, password: &str) -> Result<()> {
    offer_os_keychain_for_master_password(profile, password, MasterPasswordKeychainPrompt::NewVault)
}

pub fn parse_onboarding_biometric_choice(line: &str) -> Option<char> {
    let t = line.trim().to_lowercase();
    if t.is_empty() {
        return Some('y');
    }
    match t.chars().next()? {
        'y' => Some('y'),
        'n' => Some('n'),
        'l' => Some('l'),
        _ => None,
    }
}

#[cfg(test)]
#[allow(clippy::items_after_test_module)]
mod tests {
    use super::*;
    use tempfile::tempdir;

    // ── parse_tag_filters ─────────────────────────────────────────────────────

    #[test]
    fn parse_tag_filters_splits_key_value_pairs() {
        let filters = vec!["env=prod".to_string(), "team=backend".to_string()];
        let result = parse_tag_filters(&filters);
        assert_eq!(result, vec![("env", "prod"), ("team", "backend")]);
    }

    #[test]
    fn parse_tag_filters_skips_entries_without_equals() {
        let filters = vec!["no-equals".to_string(), "key=val".to_string()];
        let result = parse_tag_filters(&filters);
        assert_eq!(result, vec![("key", "val")]);
    }

    #[test]
    fn parse_tag_filters_empty_input_returns_empty() {
        assert!(parse_tag_filters(&[]).is_empty());
    }

    #[test]
    fn parse_tag_filters_value_may_contain_equals() {
        // splitn(2, '=') — the second segment can contain '=' characters.
        let filters = vec!["url=http://example.com?a=b&c=d".to_string()];
        let result = parse_tag_filters(&filters);
        assert_eq!(result, vec![("url", "http://example.com?a=b&c=d")]);
    }

    // ── parse_tags_map ────────────────────────────────────────────────────────

    #[test]
    fn parse_tags_map_produces_correct_map() {
        let tags = vec!["env=prod".to_string(), "team=backend".to_string()];
        let map = parse_tags_map(&tags);
        assert_eq!(map.get("env").map(String::as_str), Some("prod"));
        assert_eq!(map.get("team").map(String::as_str), Some("backend"));
        assert_eq!(map.len(), 2);
    }

    #[test]
    fn parse_tags_map_skips_entries_without_equals() {
        let tags = vec!["not-a-tag".to_string()];
        assert!(parse_tags_map(&tags).is_empty());
    }

    #[test]
    fn parse_tags_map_empty_input_is_empty() {
        assert!(parse_tags_map(&[]).is_empty());
    }

    #[test]
    fn parse_tags_map_value_may_contain_equals() {
        let tags = vec!["url=https://example.com?foo=bar".to_string()];
        let map = parse_tags_map(&tags);
        assert_eq!(
            map.get("url").map(String::as_str),
            Some("https://example.com?foo=bar")
        );
    }

    // ── parse_onboarding_biometric_choice ─────────────────────────────────────

    #[test]
    fn biometric_choice_empty_or_whitespace_means_yes() {
        assert_eq!(parse_onboarding_biometric_choice(""), Some('y'));
        assert_eq!(parse_onboarding_biometric_choice("\n"), Some('y'));
        assert_eq!(parse_onboarding_biometric_choice("   "), Some('y'));
    }

    #[test]
    fn biometric_choice_y_variants_return_yes() {
        assert_eq!(parse_onboarding_biometric_choice("y"), Some('y'));
        assert_eq!(parse_onboarding_biometric_choice("Y"), Some('y'));
        assert_eq!(parse_onboarding_biometric_choice("Y\n"), Some('y'));
    }

    #[test]
    fn biometric_choice_n_variants_return_no() {
        assert_eq!(parse_onboarding_biometric_choice("n"), Some('n'));
        assert_eq!(parse_onboarding_biometric_choice("N"), Some('n'));
        assert_eq!(parse_onboarding_biometric_choice("N\n"), Some('n'));
    }

    #[test]
    fn biometric_choice_l_variants_return_later() {
        assert_eq!(parse_onboarding_biometric_choice("l"), Some('l'));
        assert_eq!(parse_onboarding_biometric_choice("L"), Some('l'));
    }

    #[test]
    fn biometric_choice_unknown_char_returns_none() {
        assert_eq!(parse_onboarding_biometric_choice("x"), None);
        assert_eq!(parse_onboarding_biometric_choice("q"), None);
        assert_eq!(parse_onboarding_biometric_choice("?"), None);
    }

    // ── prompt_password (env-var path) ────────────────────────────────────────

    #[test]
    fn prompt_password_returns_env_var_value() {
        temp_env::with_var("TSAFE_PASSWORD", Some("my-secret-pw"), || {
            let pw = prompt_password("ignored prompt").unwrap();
            assert_eq!(pw, "my-secret-pw");
        });
    }

    #[test]
    fn prompt_password_confirmed_skips_confirm_when_env_var_set() {
        temp_env::with_var("TSAFE_PASSWORD", Some("env-pw"), || {
            let pw = prompt_password_confirmed().unwrap();
            assert_eq!(pw, "env-pw");
        });
    }

    // ── get_password_from_main ────────────────────────────────────────────────

    #[test]
    fn get_password_from_main_returns_none_for_main_profile() {
        // Avoids infinite recursion: "main" profile never looks up itself.
        assert!(get_password_from_main("main").is_none());
    }

    #[test]
    fn open_vault_with_access_profile_returns_read_only_handle() {
        let dir = tempdir().unwrap();
        let vault_dir = dir.path().join("vaults");
        std::fs::create_dir_all(&vault_dir).unwrap();

        temp_env::with_vars(
            [
                ("TSAFE_VAULT_DIR", Some(vault_dir.as_os_str())),
                ("TSAFE_PASSWORD", Some(std::ffi::OsStr::new("test-pw"))),
            ],
            || {
                let vault_path = profile::vault_path("default");
                {
                    let mut vault = Vault::create(&vault_path, b"test-pw").unwrap();
                    vault.set("API_KEY", "secret", HashMap::new()).unwrap();
                    vault.save().unwrap();
                }

                let opened =
                    open_vault_with_access_profile("default", RbacProfile::ReadOnly).unwrap();
                assert_eq!(opened.access_profile(), RbacProfile::ReadOnly);
                assert_eq!(opened.get("API_KEY").unwrap().as_str(), "secret");
            },
        );
    }

    #[test]
    fn open_vault_with_access_profile_read_only_missing_vault_does_not_create() {
        let dir = tempdir().unwrap();
        let vault_dir = dir.path().join("vaults");
        std::fs::create_dir_all(&vault_dir).unwrap();

        temp_env::with_vars(
            [
                ("TSAFE_VAULT_DIR", Some(vault_dir.as_os_str())),
                ("TSAFE_PASSWORD", Some(std::ffi::OsStr::new("test-pw"))),
            ],
            || {
                let missing_path = profile::vault_path("default");
                let err = match open_vault_with_access_profile("default", RbacProfile::ReadOnly) {
                    Ok(_) => panic!("expected missing read-only vault open to fail"),
                    Err(err) => err,
                };
                assert!(err.to_string().contains("vault not found"));
                assert!(!missing_path.exists());
            },
        );
    }
}

/// After first `tsafe init`, scan the working directory for .env files and offer
/// to import them so new users don't have to run `tsafe import` manually.
pub fn onboarding_import_dotenv(profile: &str, password: &str) -> Result<()> {
    let cwd = std::env::current_dir().unwrap_or_else(|_| std::path::PathBuf::from("."));
    let mut dotenv_files: Vec<std::path::PathBuf> = std::fs::read_dir(&cwd)
        .into_iter()
        .flatten()
        .flatten()
        .filter_map(|e| {
            let name = e.file_name();
            let s = name.to_string_lossy().into_owned();
            if s == ".env" || s.starts_with(".env.") {
                Some(e.path())
            } else {
                None
            }
        })
        .collect();
    dotenv_files.sort();
    if dotenv_files.is_empty() {
        return Ok(());
    }
    println!(
        "\n{} Found .env file(s) in the current directory:",
        "→".cyan().bold()
    );
    for f in &dotenv_files {
        println!("  {}", f.display());
    }
    // Non-interactive: TSAFE_PASSWORD set or no TTY — skip the prompt.
    use std::io::IsTerminal as _;
    let non_interactive =
        std::env::var("TSAFE_PASSWORD").is_ok() || !std::io::stdin().is_terminal();
    if non_interactive {
        return Ok(());
    }
    eprint!("Import them into the new vault? [y/N]: ");
    io::stderr().flush().ok();
    let mut resp = String::new();
    io::stdin().lock().read_line(&mut resp)?;
    if !resp.trim().eq_ignore_ascii_case("y") {
        return Ok(());
    }
    // Re-open the vault we just created.
    let vault_path = profile::vault_path(profile);
    let mut vault = Vault::open(&vault_path, password.as_bytes())
        .context("could not reopen vault for onboarding import")?;
    let mut total = 0usize;
    for path in &dotenv_files {
        match tsenv::parse_dotenv(path) {
            Err(e) => eprintln!(
                "{} skipping {}: {e}",
                "warn:".yellow().bold(),
                path.display()
            ),
            Ok(pairs) => {
                let mut n = 0usize;
                for (k, v) in &pairs {
                    if vault.set(k, v, HashMap::new()).is_ok() {
                        audit(profile)
                            .append(&AuditEntry::success(profile, "import", Some(k)))
                            .ok();
                        n += 1;
                    }
                }
                println!("  {} {} secret(s) from {}", "✓".green(), n, path.display());
                total += n;
            }
        }
    }
    println!(
        "{} Onboarding complete — {total} secret(s) imported",
        "✓".green().bold()
    );
    Ok(())
}

// ── HTTP ──────────────────────────────────────────────────────────────────────

/// Shared ureq agent with standard tsafe timeout policy.
///
/// 10 s connect / 30 s read+write. Reuse a single instance per operation to
/// share the connection pool across multiple requests (HIBP loop, Vault LIST+GET).
pub fn build_http_agent() -> ureq::Agent {
    ureq::AgentBuilder::new()
        .timeout_connect(std::time::Duration::from_secs(10))
        .timeout_read(std::time::Duration::from_secs(30))
        .timeout_write(std::time::Duration::from_secs(30))
        .build()
}