use crate::context::JoshutoContext;
use crate::error::JoshutoResult;
use crate::tab::JoshutoTab;

use super::cursor_move;

pub fn _search(curr_tab: &JoshutoTab, pattern: &str) -> Option<usize> {
    let curr_list = curr_tab.curr_list_ref()?;

    let offset = curr_list.index? + 1;
    let contents_len = curr_list.contents.len();
    for i in 0..contents_len {
        let file_name_lower = curr_list.contents[(offset + i) % contents_len]
            .file_name()
            .to_lowercase();
        if file_name_lower.contains(pattern) {
            return Some((offset + i) % contents_len);
        }
    }
    None
}
pub fn _search_rev(curr_tab: &JoshutoTab, pattern: &str) -> Option<usize> {
    let curr_list = curr_tab.curr_list_ref()?;

    let offset = curr_list.index?;
    let contents_len = curr_list.contents.len();
    for i in (0..contents_len).rev() {
        let file_name_lower = curr_list.contents[(offset + i) % contents_len]
            .file_name()
            .to_lowercase();
        if file_name_lower.contains(pattern) {
            return Some((offset + i) % contents_len);
        }
    }
    None
}

pub fn search(context: &mut JoshutoContext, pattern: &str) -> JoshutoResult<()> {
    let index = _search(context.tab_context_ref().curr_tab_ref(), pattern);
    if let Some(index) = index {
        let _ = cursor_move::cursor_move(index, context);
    }
    context.set_search_state(pattern.to_string());
    Ok(())
}

fn search_with_func(
    context: &mut JoshutoContext,
    search_func: fn(&JoshutoTab, &str) -> Option<usize>,
) {
    if let Some(s) = context.get_search_state() {
        let index = search_func(context.tab_context_ref().curr_tab_ref(), s);
        if let Some(index) = index {
            let _ = cursor_move::cursor_move(index, context);
        }
    }
}

pub fn search_next(context: &mut JoshutoContext) -> JoshutoResult<()> {
    search_with_func(context, _search);
    Ok(())
}

pub fn search_prev(context: &mut JoshutoContext) -> JoshutoResult<()> {
    search_with_func(context, _search_rev);
    Ok(())
}