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// Copyright (c) 2020 by Enrique Pérez Arnaud <enrique at cazalla.net>
//
// This file is part of the modus_ponens project.
// http://www.modus_ponens.net
//
// The modus_ponens project 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.
//
// The modus_ponens project 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 any part of the modus_ponens project.
// If not, see <http://www.gnu.org/licenses/>.

use std::fmt;
use std::hash::{Hash, Hasher};

#[derive(Debug, Clone)]
pub struct MPSegment {
    pub text: String,
    pub name: u64,
    pub is_leaf: bool,
    pub is_var: bool,
    pub in_var_range: bool,
    pub is_empty: bool,
    pub unique: bool,
}

impl MPSegment {
    pub fn new(
        name: u64,
        text: String,
        is_leaf: bool,
        is_var: bool,
        in_var_range: bool,
        is_empty: bool,
        unique: bool,
    ) -> MPSegment {
        MPSegment {
            name,
            text,
            is_leaf,
            is_var,
            in_var_range,
            is_empty,
            unique,
        }
    }
}

impl fmt::Display for MPSegment {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}: {}", self.name, self.text)
    }
}

impl PartialEq for MPSegment {
    fn eq(&self, other: &Self) -> bool {
        self.name == other.name && self.text == other.text
    }
}

impl Eq for MPSegment {}

impl Hash for MPSegment {
    fn hash<H: Hasher>(&self, state: &mut H) {
        self.name.hash(state);
        self.text.hash(state);
        self.is_leaf.hash(state);
    }
}