// 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 crate::data::{ArrayData, contains_nulls};

use arrow_buffer::ArrowNativeType;

use num_integer::Integer;

use super::utils::equal_len;

fn offset_value_equal<T: ArrowNativeType + Integer>(

    lhs_values: &[u8],

    rhs_values: &[u8],

    lhs_offsets: &[T],

    rhs_offsets: &[T],

    lhs_pos: usize,

    rhs_pos: usize,

    len: usize,

) -> bool {

    let lhs_start = lhs_offsets[lhs_pos].as_usize();

    let rhs_start = rhs_offsets[rhs_pos].as_usize();

    let lhs_len = (lhs_offsets[lhs_pos + len] - lhs_offsets[lhs_pos])

        .to_usize()

        .unwrap();

    let rhs_len = (rhs_offsets[rhs_pos + len] - rhs_offsets[rhs_pos])

        .to_usize()

        .unwrap();

    if lhs_len == 0 && 
rhs_len == 03
 {

        return true;

    }

    lhs_len == rhs_len && equal_len(lhs_values, rhs_values, lhs_start, rhs_start, lhs_len)

}

pub(super) fn variable_sized_equal<T: ArrowNativeType + Integer>(

    lhs: &ArrayData,

    rhs: &ArrayData,

    lhs_start: usize,

    rhs_start: usize,

    len: usize,

) -> bool {

    let lhs_offsets = lhs.buffer::<T>(0);

    let rhs_offsets = rhs.buffer::<T>(0);

    // the offsets of the `ArrayData` are ignored as they are only applied to the offset buffer.

    let lhs_values = lhs.buffers()[1].as_slice();

    let rhs_values = rhs.buffers()[1].as_slice();

    // Only checking one null mask here because by the time the control flow reaches

    // this point, the equality of the two masks would have already been verified.

    if !contains_nulls(lhs.nulls(), lhs_start, len) {

        offset_value_equal(

            lhs_values,

            rhs_values,

            lhs_offsets,

            rhs_offsets,

            lhs_start,

            rhs_start,

            len,

        )

    } else {

        
(0..len)50
.
all50
(|i| {

            let lhs_pos = lhs_start + i;

            let rhs_pos = rhs_start + i;

            // the null bits can still be `None`, indicating that the value is valid.

            let lhs_is_null = lhs.nulls().map(|v| v.is_null(lhs_pos)).unwrap_or_default();

            let rhs_is_null = rhs.nulls().map(|v| v.is_null(rhs_pos)).unwrap_or_default();

            lhs_is_null

                || (lhs_is_null == rhs_is_null)

                    && offset_value_equal(

                        lhs_values,

                        rhs_values,

                        lhs_offsets,

                        rhs_offsets,

                        lhs_pos,

                        rhs_pos,

                        1,

                    )

        })

    }

}