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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::str::FromStr;

use crate::{
    common::{attribute::cleanup_policy::CleanupPolicy, config::TopicConfig},
    TopicAttributes,
};

pub fn is_compaction(topic_config: &Option<TopicConfig>) -> bool {
    match topic_config {
        Some(config) => CleanupPolicy::COMPACTION == get_delete_policy(Some(config)),
        None => false,
    }
}

pub fn get_delete_policy(topic_config: Option<&TopicConfig>) -> CleanupPolicy {
    match topic_config {
        Some(config) => {
            let attribute_name = TopicAttributes::CLEANUP_POLICY_ATTRIBUTE.get_name();
            match config.attributes.get(attribute_name) {
                Some(value) => CleanupPolicy::from_str(value.as_str()).unwrap(),
                None => CleanupPolicy::from_str(
                    TopicAttributes::CLEANUP_POLICY_ATTRIBUTE.get_default_value(),
                )
                .unwrap(),
            }
        }
        None => {
            CleanupPolicy::from_str(TopicAttributes::CLEANUP_POLICY_ATTRIBUTE.get_default_value())
                .unwrap()
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::common::{attribute::cleanup_policy::CleanupPolicy, config::TopicConfig};

    #[test]
    fn is_compaction_returns_true_when_cleanup_policy_is_compaction() {
        let mut topic_config = TopicConfig::default();
        topic_config.attributes.insert(
            TopicAttributes::CLEANUP_POLICY_ATTRIBUTE
                .get_name()
                .to_string(),
            CleanupPolicy::COMPACTION.to_string(),
        );
        assert_eq!(is_compaction(&Some(topic_config)), true);
    }

    #[test]
    fn is_compaction_returns_false_when_cleanup_policy_is_not_compaction() {
        let mut topic_config = TopicConfig::default();
        topic_config.attributes.insert(
            TopicAttributes::CLEANUP_POLICY_ATTRIBUTE
                .get_name()
                .to_string(),
            CleanupPolicy::DELETE.to_string(),
        );
        assert_eq!(is_compaction(&Some(topic_config)), false);
    }

    #[test]
    fn is_compaction_returns_false_when_topic_config_is_none() {
        assert_eq!(is_compaction(&None), false);
    }

    #[test]
    fn get_delete_policy_returns_cleanup_policy_from_topic_config() {
        let mut topic_config = TopicConfig::default();
        topic_config.attributes.insert(
            TopicAttributes::CLEANUP_POLICY_ATTRIBUTE
                .get_name()
                .to_string(),
            CleanupPolicy::DELETE.to_string(),
        );
        assert_eq!(
            get_delete_policy(Some(&topic_config)),
            CleanupPolicy::DELETE
        );
    }

    #[test]
    fn get_delete_policy_returns_default_cleanup_policy_when_not_set_in_topic_config() {
        let topic_config = TopicConfig::default();
        assert_eq!(
            get_delete_policy(Some(&topic_config)),
            CleanupPolicy::from_str(TopicAttributes::CLEANUP_POLICY_ATTRIBUTE.get_default_value())
                .unwrap()
        );
    }

    #[test]
    fn get_delete_policy_returns_default_cleanup_policy_when_topic_config_is_none() {
        assert_eq!(
            get_delete_policy(None),
            CleanupPolicy::from_str(TopicAttributes::CLEANUP_POLICY_ATTRIBUTE.get_default_value())
                .unwrap()
        );
    }
}