pub use encoding_rs as encoding;

pub mod auto_pairs;
pub mod chars;
pub mod comment;
pub mod config;
pub mod diagnostic;
pub mod diff;
pub mod graphemes;
pub mod history;
pub mod increment;
pub mod indent;
pub mod line_ending;
pub mod macros;
pub mod match_brackets;
pub mod movement;
pub mod object;
pub mod path;
mod position;
pub mod register;
pub mod search;
pub mod selection;
pub mod shellwords;
mod state;
pub mod surround;
pub mod syntax;
pub mod textobject;
mod transaction;

pub mod unicode {
    pub use unicode_general_category as category;
    pub use unicode_segmentation as segmentation;
    pub use unicode_width as width;
}

pub fn find_first_non_whitespace_char(line: RopeSlice) -> Option<usize> {
    line.chars().position(|ch| !ch.is_whitespace())
}

/// Find project root.
///
/// Order of detection:
/// * Top-most folder containing a root marker in current git repository
/// * Git repostory root if no marker detected
/// * Top-most folder containing a root marker if not git repository detected
/// * Current working directory as fallback
pub fn find_root(root: Option<&str>, root_markers: &[String]) -> Option<std::path::PathBuf> {
    let current_dir = std::env::current_dir().expect("unable to determine current directory");

    let root = match root {
        Some(root) => {
            let root = std::path::Path::new(root);
            if root.is_absolute() {
                root.to_path_buf()
            } else {
                current_dir.join(root)
            }
        }
        None => current_dir.clone(),
    };

    let mut top_marker = None;
    for ancestor in root.ancestors() {
        for marker in root_markers {
            if ancestor.join(marker).exists() {
                top_marker = Some(ancestor);
                break;
            }
        }
        // don't go higher than repo
        if ancestor.join(".git").is_dir() {
            // Use workspace if detected from marker
            return Some(top_marker.unwrap_or(ancestor).to_path_buf());
        }
    }

    // In absence of git repo, use workspace if detected
    if top_marker.is_some() {
        top_marker.map(|a| a.to_path_buf())
    } else {
        Some(current_dir)
    }
}

pub use ropey::{Rope, RopeBuilder, RopeSlice};

// pub use tendril::StrTendril as Tendril;
pub use smartstring::SmartString;

pub type Tendril = SmartString<smartstring::LazyCompact>;

#[doc(inline)]
pub use {regex, tree_sitter};

pub use graphemes::RopeGraphemes;
pub use position::{coords_at_pos, pos_at_coords, visual_coords_at_pos, Position};
pub use selection::{Range, Selection};
pub use smallvec::{smallvec, SmallVec};
pub use syntax::Syntax;

pub use diagnostic::Diagnostic;
pub use state::State;

pub use line_ending::{LineEnding, DEFAULT_LINE_ENDING};
pub use transaction::{Assoc, Change, ChangeSet, Operation, Transaction};