use std::sync::Arc;

use arc_swap::ArcSwap;
use helix_core::RopeSlice;
use helix_event::AsyncHook;

use crate::config::Config;
use crate::events;
use crate::handlers::completion::CompletionHandler;
use crate::handlers::signature_help::SignatureHelpHandler;

pub use completion::trigger_auto_completion;
pub use helix_view::handlers::lsp::SignatureHelpInvoked;
pub use helix_view::handlers::Handlers;

fn rope_ends_with(text: &str, rope: RopeSlice<'_>) -> bool {
    let len = rope.len_bytes();
    if len < text.len() {
        return false;
    }
    rope.get_byte_slice(len - text.len()..)
        .map_or(false, |end| end == text)
}

pub(crate) mod completion;
mod signature_help;

pub fn setup(config: Arc<ArcSwap<Config>>) -> Handlers {
    events::register();

    let completions = CompletionHandler::new(config).spawn();
    let signature_hints = SignatureHelpHandler::new().spawn();
    let handlers = Handlers {
        completions,
        signature_hints,
    };
    completion::register_hooks(&handlers);
    signature_help::register_hooks(&handlers);
    handlers
}