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// Copyright 2022 Datafuse Labs
//
// Licensed 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 crate::*;

/// Entry is returned by `Page` or `BlockingPage` during list operations.
///
/// # Notes
///
/// Differences between `crate::Entry` and `oio::Entry`:
///
/// - `crate::Entry` is the user's public API and have less public methods.
/// - `oio::Entry` is the raw API and doesn't expose to users.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Entry {
    path: String,
    meta: Metadata,
}

impl Entry {
    /// Create a new entry by its corresponding underlying storage.
    pub fn new(path: &str, meta: Metadata) -> Entry {
        Self::with(path.to_string(), meta)
    }

    /// Create a new entry with given value.
    pub fn with(path: String, meta: Metadata) -> Entry {
        debug_assert!(
            meta.mode().is_dir() == path.ends_with('/'),
            "mode {:?} not match with path {}",
            meta.mode(),
            path
        );

        Entry { path, meta }
    }

    /// Set path for entry.
    pub fn set_path(&mut self, path: &str) -> &mut Self {
        self.path = path.to_string();
        self
    }

    /// Get the path of entry.
    pub fn path(&self) -> &str {
        &self.path
    }

    /// Set mode for entry.
    ///
    /// # Note
    ///
    /// Please use this function carefully.
    pub fn set_mode(&mut self, mode: EntryMode) -> &mut Self {
        self.meta.set_mode(mode);
        self
    }

    /// Get entry's mode.
    pub fn mode(&self) -> EntryMode {
        self.meta.mode()
    }

    /// Consume self to convert into an Entry.
    ///
    /// NOTE: implement this by hand to avoid leaking raw entry to end-users.
    pub(crate) fn into_entry(self) -> crate::Entry {
        crate::Entry::new_with(self.path, self.meta)
    }
}