/*
 * This file is part of espanso.
 *
 * Copyright (C) 2019-202 case_insensitive: (), preserve_case_markers: (), left_word: (), right_word: ()1 Federico Terzi
 *
 * espanso is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * espanso is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
 */

use crate::event::Key;

pub mod matcher;
mod tree;
mod util;

#[derive(Debug, Clone, PartialEq, Eq)]
pub enum RollingItem {
    WordSeparator,
    Key(Key),
    Char(String),
    CharInsensitive(String),
}

#[derive(Debug, PartialEq, Eq)]
pub struct RollingMatch<Id> {
    pub id: Id,
    pub items: Vec<RollingItem>,
}

impl<Id> RollingMatch<Id> {
    pub fn new(id: Id, items: Vec<RollingItem>) -> Self {
        Self { id, items }
    }

    pub fn from_string(id: Id, string: &str, opt: &StringMatchOptions) -> Self {
        let mut items = Vec::new();

        if opt.left_word {
            items.push(RollingItem::WordSeparator);
        }

        for c in string.chars() {
            if opt.case_insensitive {
                items.push(RollingItem::CharInsensitive(c.to_string()));
            } else {
                items.push(RollingItem::Char(c.to_string()));
            }
        }

        if opt.right_word {
            items.push(RollingItem::WordSeparator);
        }

        Self { id, items }
    }

    pub fn from_items(id: Id, items: &[RollingItem]) -> Self {
        Self {
            id,
            items: items.to_vec(),
        }
    }
}

#[derive(Default)]
pub struct StringMatchOptions {
    pub case_insensitive: bool,
    pub left_word: bool,
    pub right_word: bool,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_match_from_string_base_case() {
        assert_eq!(
            RollingMatch::from_string(1, "test", &StringMatchOptions::default()),
            RollingMatch {
                id: 1,
                items: vec![
                    RollingItem::Char("t".to_string()),
                    RollingItem::Char("e".to_string()),
                    RollingItem::Char("s".to_string()),
                    RollingItem::Char("t".to_string()),
                ]
            }
        );
    }

    #[test]
    fn test_match_from_string_left_word() {
        assert_eq!(
            RollingMatch::from_string(
                1,
                "test",
                &StringMatchOptions {
                    left_word: true,
                    ..Default::default()
                }
            ),
            RollingMatch {
                id: 1,
                items: vec![
                    RollingItem::WordSeparator,
                    RollingItem::Char("t".to_string()),
                    RollingItem::Char("e".to_string()),
                    RollingItem::Char("s".to_string()),
                    RollingItem::Char("t".to_string()),
                ]
            }
        );
    }

    #[test]
    fn test_match_from_string_right_word() {
        assert_eq!(
            RollingMatch::from_string(
                1,
                "test",
                &StringMatchOptions {
                    right_word: true,
                    ..Default::default()
                }
            ),
            RollingMatch {
                id: 1,
                items: vec![
                    RollingItem::Char("t".to_string()),
                    RollingItem::Char("e".to_string()),
                    RollingItem::Char("s".to_string()),
                    RollingItem::Char("t".to_string()),
                    RollingItem::WordSeparator,
                ]
            }
        );
    }

    #[test]
    fn test_match_from_string_case_insensitive() {
        assert_eq!(
            RollingMatch::from_string(
                1,
                "test",
                &StringMatchOptions {
                    case_insensitive: true,
                    ..Default::default()
                }
            ),
            RollingMatch {
                id: 1,
                items: vec![
                    RollingItem::CharInsensitive("t".to_string()),
                    RollingItem::CharInsensitive("e".to_string()),
                    RollingItem::CharInsensitive("s".to_string()),
                    RollingItem::CharInsensitive("t".to_string()),
                ]
            }
        );
    }
}
