// Copyright © 2025 Mikhail Hogrefe
//
// This file is part of Malachite.
//
// Malachite is free software: you can redistribute it and/or modify it under the terms of the GNU
// Lesser General Public License (LGPL) as published by the Free Software Foundation; either version
// 3 of the License, or (at your option) any later version. See <https://www.gnu.org/licenses/>.

use malachite_base::test_util::bench::{BenchmarkType, run_benchmark};
use malachite_base::test_util::generators::common::{GenConfig, GenMode};
use malachite_base::test_util::runner::Runner;
use malachite_nz::integer::Integer;
use malachite_nz::test_util::bench::bucketers::{
    pair_2_pair_integer_max_bit_bucketer, pair_integer_max_bit_bucketer,
    triple_3_pair_integer_max_bit_bucketer, triple_3_vec_integer_sum_bits_bucketer,
    vec_integer_sum_bits_bucketer,
};
use malachite_nz::test_util::generators::{
    integer_pair_gen, integer_pair_gen_nrm, integer_pair_gen_rm, integer_vec_gen,
    integer_vec_gen_nrm,
};
use malachite_nz::test_util::integer::arithmetic::mul::integer_product_naive;
use num::BigInt;
use std::iter::Product;

pub(crate) fn register(runner: &mut Runner) {
    register_demo!(runner, demo_integer_mul);
    register_demo!(runner, demo_integer_mul_val_ref);
    register_demo!(runner, demo_integer_mul_ref_val);
    register_demo!(runner, demo_integer_mul_ref_ref);
    register_demo!(runner, demo_integer_mul_assign);
    register_demo!(runner, demo_integer_mul_assign_ref);
    register_demo!(runner, demo_integer_product);
    register_demo!(runner, demo_integer_ref_product);

    register_bench!(runner, benchmark_integer_mul_library_comparison);
    register_bench!(runner, benchmark_integer_mul_evaluation_strategy);
    register_bench!(runner, benchmark_integer_mul_assign_library_comparison);
    register_bench!(runner, benchmark_integer_mul_assign_evaluation_strategy);
    register_bench!(runner, benchmark_integer_product_algorithms);
    register_bench!(runner, benchmark_integer_product_library_comparison);
    register_bench!(runner, benchmark_integer_product_evaluation_strategy);
}

fn demo_integer_mul(gm: GenMode, config: &GenConfig, limit: usize) {
    for (x, y) in integer_pair_gen().get(gm, config).take(limit) {
        let x_old = x.clone();
        let y_old = y.clone();
        println!("{} * {} = {}", x_old, y_old, x * y);
    }
}

fn demo_integer_mul_val_ref(gm: GenMode, config: &GenConfig, limit: usize) {
    for (x, y) in integer_pair_gen().get(gm, config).take(limit) {
        let x_old = x.clone();
        println!("{} * &{} = {}", x_old, y, x * &y);
    }
}

fn demo_integer_mul_ref_val(gm: GenMode, config: &GenConfig, limit: usize) {
    for (x, y) in integer_pair_gen().get(gm, config).take(limit) {
        let y_old = y.clone();
        println!("&{} * {} = {}", x, y_old, &x * y);
    }
}

fn demo_integer_mul_ref_ref(gm: GenMode, config: &GenConfig, limit: usize) {
    for (x, y) in integer_pair_gen().get(gm, config).take(limit) {
        println!("&{} * &{} = {}", x, y, &x * &y);
    }
}

fn demo_integer_mul_assign(gm: GenMode, config: &GenConfig, limit: usize) {
    for (mut x, y) in integer_pair_gen().get(gm, config).take(limit) {
        let x_old = x.clone();
        x *= y.clone();
        println!("x := {x_old}; x *= {y}; x = {x}");
    }
}

fn demo_integer_mul_assign_ref(gm: GenMode, config: &GenConfig, limit: usize) {
    for (mut x, y) in integer_pair_gen().get(gm, config).take(limit) {
        let x_old = x.clone();
        x *= &y;
        println!("x := {x_old}; x *= &{y}; x = {x}");
    }
}

fn demo_integer_product(gm: GenMode, config: &GenConfig, limit: usize) {
    for xs in integer_vec_gen().get(gm, config).take(limit) {
        println!(
            "product({:?}) = {}",
            xs.clone(),
            Integer::product(xs.into_iter())
        );
    }
}

fn demo_integer_ref_product(gm: GenMode, config: &GenConfig, limit: usize) {
    for xs in integer_vec_gen().get(gm, config).take(limit) {
        println!("product({:?}) = {}", xs, Integer::product(xs.iter()));
    }
}

#[allow(clippy::no_effect, clippy::unnecessary_operation, unused_must_use)]
fn benchmark_integer_mul_library_comparison(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer * Integer",
        BenchmarkType::LibraryComparison,
        integer_pair_gen_nrm().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &triple_3_pair_integer_max_bit_bucketer("x", "y"),
        &mut [
            ("Malachite", &mut |(_, _, (x, y))| no_out!(x * y)),
            ("num", &mut |((x, y), _, _)| no_out!(x * y)),
            ("rug", &mut |(_, (x, y), _)| no_out!(x * y)),
        ],
    );
}

#[allow(clippy::no_effect, unused_must_use)]
fn benchmark_integer_mul_evaluation_strategy(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer * Integer",
        BenchmarkType::EvaluationStrategy,
        integer_pair_gen().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &pair_integer_max_bit_bucketer("x", "y"),
        &mut [
            ("Integer * Integer", &mut |(x, y)| no_out!(x * y)),
            ("Integer * &Integer", &mut |(x, y)| no_out!(x * &y)),
            ("&Integer * Integer", &mut |(x, y)| no_out!(&x * y)),
            ("&Integer * &Integer", &mut |(x, y)| no_out!(&x * &y)),
        ],
    );
}

fn benchmark_integer_mul_assign_library_comparison(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer *= Integer",
        BenchmarkType::LibraryComparison,
        integer_pair_gen_rm().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &pair_2_pair_integer_max_bit_bucketer("x", "y"),
        &mut [("Malachite", &mut |(_, (mut x, y))| x *= y), ("rug", &mut |((mut x, y), _)| x *= y)],
    );
}

fn benchmark_integer_mul_assign_evaluation_strategy(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer *= Integer",
        BenchmarkType::EvaluationStrategy,
        integer_pair_gen().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &pair_integer_max_bit_bucketer("x", "y"),
        &mut [
            ("Integer *= Integer", &mut |(mut x, y)| no_out!(x *= y)),
            ("Integer *= &Integer", &mut |(mut x, y)| no_out!(x *= &y)),
        ],
    );
}

fn benchmark_integer_product_library_comparison(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer::product(Iterator<Item=Integer>)",
        BenchmarkType::LibraryComparison,
        integer_vec_gen_nrm().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &triple_3_vec_integer_sum_bits_bucketer(),
        &mut [
            ("Malachite", &mut |(_, _, xs)| {
                no_out!(Integer::product(xs.into_iter()));
            }),
            ("num", &mut |(xs, _, _)| {
                no_out!(BigInt::product(xs.into_iter()));
            }),
            ("rug", &mut |(_, xs, _)| {
                no_out!(rug::Integer::product(xs.iter()));
            }),
        ],
    );
}

fn benchmark_integer_product_algorithms(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer::product(Iterator<Item=Integer>)",
        BenchmarkType::Algorithms,
        integer_vec_gen().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &vec_integer_sum_bits_bucketer(),
        &mut [
            ("default", &mut |xs| {
                no_out!(Integer::product(xs.into_iter()));
            }),
            ("naive", &mut |xs| {
                no_out!(integer_product_naive(xs.into_iter()));
            }),
        ],
    );
}

fn benchmark_integer_product_evaluation_strategy(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer::product(Iterator<Item=Integer>)",
        BenchmarkType::EvaluationStrategy,
        integer_vec_gen().get(gm, config),
        gm.name(),
        limit,
        file_name,
        &vec_integer_sum_bits_bucketer(),
        &mut [
            ("Integer::product(Iterator<Item=Integer>)", &mut |xs| {
                no_out!(Integer::product(xs.into_iter()));
            }),
            ("Integer::product(Iterator<Item=&Integer>)", &mut |xs| {
                no_out!(Integer::product(xs.iter()));
            }),
        ],
    );
}
