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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use std::{fmt, str::FromStr};

#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub enum CleanupPolicy {
    #[default]
    DELETE,
    COMPACTION,
}

impl fmt::Display for CleanupPolicy {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            CleanupPolicy::DELETE => write!(f, "DELETE"),
            CleanupPolicy::COMPACTION => write!(f, "COMPACTION"),
        }
    }
}

#[derive(Debug)]
pub struct ParseCleanupPolicyError;

impl fmt::Display for ParseCleanupPolicyError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "invalid cleanup policy")
    }
}

impl FromStr for CleanupPolicy {
    type Err = ParseCleanupPolicyError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s.to_uppercase().as_str() {
            "DELETE" => Ok(CleanupPolicy::DELETE),
            "COMPACTION" => Ok(CleanupPolicy::COMPACTION),
            _ => Err(ParseCleanupPolicyError),
        }
    }
}