// 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 risingwave_common::array::*;
use risingwave_common::types::{DefaultOrdered, ScalarRefImpl};
use risingwave_expr::function;

#[function("array_min(anyarray) -> any")]
pub fn array_min(list: ListRef<'_>) -> Option<ScalarRefImpl<'_>> {
    let min_value = list.iter().flatten().map(DefaultOrdered).min();
    min_value.map(|v| v.0)
}

#[function("array_max(anyarray) -> any")]
pub fn array_max(list: ListRef<'_>) -> Option<ScalarRefImpl<'_>> {
    let max_value = list.iter().flatten().map(DefaultOrdered).max();
    max_value.map(|v| v.0)
}
