hawdb-storage 0.3.0

// Copyright 2026 Nowledge
//
// 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.

//! Relational row-page recovery status contract.

#[derive(Debug, Clone, Default, PartialEq, Eq)]
pub enum RelationalRowPageRecoveryStatus {
    #[default]
    Missing,
    CheckpointReady {
        generation: u64,
        source_commit_epoch: u64,
        root_pages: u64,
    },
    WalRecovered {
        base_generation: u64,
        delta_generation: u64,
        base_commit_epoch: u64,
        recovered_commit_epoch: u64,
        delta_runs: usize,
        delta_entries: u64,
        peak_dirty_bytes: Option<usize>,
    },
    LiveCurrent {
        base_generation: u64,
        base_commit_epoch: u64,
        visible_commit_epoch: u64,
        live_batches: usize,
        live_entries: usize,
        live_encoded_bytes: usize,
        live_resident_bytes: usize,
    },
    LiveUnavailable {
        base_generation: u64,
        base_commit_epoch: u64,
        last_visible_commit_epoch: u64,
        failed_commit_epoch: u64,
        checkpoint_required: bool,
        reason: String,
    },
    Stale {
        generation: u64,
        source_commit_epoch: u64,
        checkpoint_generation: u64,
        checkpoint_commit_epoch: u64,
    },
    Unavailable {
        base_generation: Option<u64>,
        base_commit_epoch: Option<u64>,
        recovered_commit_epoch: u64,
        checkpoint_required: bool,
        reason: String,
    },
}