// Copyright 2023 RisingWave 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 std::sync::Arc;

use risingwave_pb::stream_plan::DedupNode;
use risingwave_storage::StateStore;

use super::ExecutorBuilder;
use crate::common::table::state_table::StateTableBuilder;
use crate::error::StreamResult;
use crate::executor::{AppendOnlyDedupExecutor, Executor};
use crate::task::ExecutorParams;

pub struct AppendOnlyDedupExecutorBuilder;

impl ExecutorBuilder for AppendOnlyDedupExecutorBuilder {
    type Node = DedupNode;

    async fn new_boxed_executor(
        params: ExecutorParams,
        node: &Self::Node,
        store: impl StateStore,
    ) -> StreamResult<Executor> {
        let [input]: [_; 1] = params.input.try_into().unwrap();
        let table = node.get_state_table()?;
        let vnodes = params.vnode_bitmap.map(Arc::new);
        let state_table = StateTableBuilder::new(table, store, vnodes)
            .enable_preload_all_rows_by_config(&params.config)
            .build()
            .await;
        let exec = AppendOnlyDedupExecutor::new(
            params.actor_context,
            input,
            params.info.stream_key.clone(), /* TODO(rc): should change to use `dedup_column_indices`, but need to check backward compatibility */
            state_table,
            params.watermark_epoch,
            params.executor_stats.clone(),
        );
        Ok((params.info, exec).into())
    }
}
