use super::editor::TextEditor;

impl TextEditor {
    pub fn update_find_matches(&mut self) {
        self.find_matches.clear();
        self.current_match_index = None;

        if self.find_query.is_empty() {
            return;
        }

        if let Some(tab) = self.get_active_tab() {
            let content = &tab.content;
            let query = if self.case_sensitive_search {
                self.find_query.clone()
            } else {
                self.find_query.to_lowercase()
            };

            let search_content = if self.case_sensitive_search {
                content.clone()
            } else {
                content.to_lowercase()
            };

            let mut start = 0;
            while let Some(pos) = search_content[start..].find(&query) {
                let absolute_pos = start + pos;
                self.find_matches
                    .push((absolute_pos, absolute_pos + query.len()));
                start = absolute_pos + 1;
            }

            if !self.find_matches.is_empty() {
                self.current_match_index = Some(0);
            }
        }
    }

    pub fn find_next(&mut self) {
        if self.find_matches.is_empty() {
            return;
        }

        if let Some(current) = self.current_match_index {
            self.current_match_index = Some((current + 1) % self.find_matches.len());
        } else {
            self.current_match_index = Some(0);
        }
    }

    pub fn find_previous(&mut self) {
        if self.find_matches.is_empty() {
            return;
        }

        if let Some(current) = self.current_match_index {
            self.current_match_index = Some(if current == 0 {
                self.find_matches.len() - 1
            } else {
                current - 1
            });
        } else {
            self.current_match_index = Some(0);
        }
    }

    pub fn get_current_match_position(&self) -> Option<(usize, usize)> {
        if let Some(index) = self.current_match_index {
            self.find_matches.get(index).copied()
        } else {
            None
        }
    }
}