use radicle::cob::issue::Issue;
use radicle::cob::thread::{Comment, CommentId};
use radicle::crypto::ssh::keystore::MemorySigner;
use radicle::crypto::{ssh::Keystore, Signer};
use radicle::profile::env::RAD_PASSPHRASE;
use radicle::profile::Profile;

pub use radicle_term::io::*;
pub use radicle_term::spinner;

use inquire::validator;

/// Validates secret key passphrases.
#[derive(Clone)]
pub struct PassphraseValidator {
    keystore: Keystore,
}

impl PassphraseValidator {
    /// Create a new validator.
    pub fn new(keystore: Keystore) -> Self {
        Self { keystore }
    }
}

impl inquire::validator::StringValidator for PassphraseValidator {
    fn validate(
        &self,
        input: &str,
    ) -> Result<validator::Validation, inquire::error::CustomUserError> {
        let passphrase = Passphrase::from(input.to_owned());
        if self.keystore.is_valid_passphrase(&passphrase)? {
            Ok(validator::Validation::Valid)
        } else {
            Ok(validator::Validation::Invalid(
                validator::ErrorMessage::from("Invalid passphrase, please try again"),
            ))
        }
    }
}

/// Get the signer. First we try getting it from ssh-agent, otherwise we prompt the user.
pub fn signer(profile: &Profile) -> anyhow::Result<Box<dyn Signer>> {
    if let Ok(signer) = profile.signer() {
        return Ok(signer);
    }
    let validator = PassphraseValidator::new(profile.keystore.clone());
    let passphrase = passphrase(RAD_PASSPHRASE, validator)?;
    let spinner = spinner("Unsealing key...");
    let signer = MemorySigner::load(&profile.keystore, Some(passphrase))?;

    spinner.finish();

    Ok(signer.boxed())
}

pub fn comment_select(issue: &Issue) -> Option<(&CommentId, &Comment)> {
    let comments = issue.comments().collect::<Vec<_>>();
    let selection = Select::new(
        "Which comment do you want to react to?",
        (0..comments.len()).collect(),
    )
    .with_render_config(*CONFIG)
    .with_formatter(&|i| comments[i.index].1.body().to_owned())
    .prompt()
    .ok()?;

    comments.get(selection).copied()
}