// 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 jni::{
    errors::Result as JniResult,
    objects::{JClass, JStaticMethodID},
    signature::{Primitive, ReturnType},
    strings::JNIString,
    Env,
};

/// A struct that holds all the JNI methods and fields for JVM CometExec object.
pub struct CometExec<'a> {
    pub class: JClass<'a>,
    pub method_get_bool: JStaticMethodID,
    pub method_get_bool_ret: ReturnType,
    pub method_get_byte: JStaticMethodID,
    pub method_get_byte_ret: ReturnType,
    pub method_get_short: JStaticMethodID,
    pub method_get_short_ret: ReturnType,
    pub method_get_int: JStaticMethodID,
    pub method_get_int_ret: ReturnType,
    pub method_get_long: JStaticMethodID,
    pub method_get_long_ret: ReturnType,
    pub method_get_float: JStaticMethodID,
    pub method_get_float_ret: ReturnType,
    pub method_get_double: JStaticMethodID,
    pub method_get_double_ret: ReturnType,
    pub method_get_decimal: JStaticMethodID,
    pub method_get_decimal_ret: ReturnType,
    pub method_get_string: JStaticMethodID,
    pub method_get_string_ret: ReturnType,
    pub method_get_binary: JStaticMethodID,
    pub method_get_binary_ret: ReturnType,
    pub method_is_null: JStaticMethodID,
    pub method_is_null_ret: ReturnType,
}

impl<'a> CometExec<'a> {
    pub const JVM_CLASS: &'static str = "org/apache/spark/sql/comet/CometScalarSubquery";

    pub fn new(env: &mut Env<'a>) -> JniResult<CometExec<'a>> {
        let class = env.find_class(JNIString::new(Self::JVM_CLASS))?;

        Ok(CometExec {
            method_get_bool: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getBoolean"),
                jni::jni_sig!("(JJ)Z"),
            )?,
            method_get_bool_ret: ReturnType::Primitive(Primitive::Boolean),
            method_get_byte: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getByte"),
                jni::jni_sig!("(JJ)B"),
            )?,
            method_get_byte_ret: ReturnType::Primitive(Primitive::Byte),
            method_get_short: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getShort"),
                jni::jni_sig!("(JJ)S"),
            )?,
            method_get_short_ret: ReturnType::Primitive(Primitive::Short),
            method_get_int: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getInt"),
                jni::jni_sig!("(JJ)I"),
            )?,
            method_get_int_ret: ReturnType::Primitive(Primitive::Int),
            method_get_long: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getLong"),
                jni::jni_sig!("(JJ)J"),
            )?,
            method_get_long_ret: ReturnType::Primitive(Primitive::Long),
            method_get_float: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getFloat"),
                jni::jni_sig!("(JJ)F"),
            )?,
            method_get_float_ret: ReturnType::Primitive(Primitive::Float),
            method_get_double: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getDouble"),
                jni::jni_sig!("(JJ)D"),
            )?,
            method_get_double_ret: ReturnType::Primitive(Primitive::Double),
            method_get_decimal: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getDecimal"),
                jni::jni_sig!("(JJ)[B"),
            )?,
            method_get_decimal_ret: ReturnType::Array,
            method_get_string: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getString"),
                jni::jni_sig!("(JJ)Ljava/lang/String;"),
            )?,
            method_get_string_ret: ReturnType::Object,
            method_get_binary: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("getBinary"),
                jni::jni_sig!("(JJ)[B"),
            )?,
            method_get_binary_ret: ReturnType::Array,
            method_is_null: env.get_static_method_id(
                JNIString::new(Self::JVM_CLASS),
                jni::jni_str!("isNull"),
                jni::jni_sig!("(JJ)Z"),
            )?,
            method_is_null_ret: ReturnType::Primitive(Primitive::Boolean),
            class,
        })
    }
}
