// Copyright © 2026 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::add::integer_sum_alt;
use num::BigInt;
use std::iter::Sum;

pub(crate) fn register(runner: &mut Runner) {
    register_demo!(runner, demo_integer_add);
    register_demo!(runner, demo_integer_add_val_ref);
    register_demo!(runner, demo_integer_add_ref_val);
    register_demo!(runner, demo_integer_add_ref_ref);
    register_demo!(runner, demo_integer_add_assign);
    register_demo!(runner, demo_integer_add_assign_ref);
    register_demo!(runner, demo_integer_sum);
    register_demo!(runner, demo_integer_ref_sum);

    register_bench!(runner, benchmark_integer_add_library_comparison);
    register_bench!(runner, benchmark_integer_add_evaluation_strategy);
    register_bench!(runner, benchmark_integer_add_assign_library_comparison);
    register_bench!(runner, benchmark_integer_add_assign_evaluation_strategy);
    register_bench!(runner, benchmark_integer_sum_algorithms);
    register_bench!(runner, benchmark_integer_sum_library_comparison);
    register_bench!(runner, benchmark_integer_sum_evaluation_strategy);
}

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

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

#[allow(clippy::no_effect, clippy::unnecessary_operation, unused_must_use)]
fn benchmark_integer_add_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_add_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_add_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_add_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_sum_library_comparison(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer::sum(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::sum(xs.into_iter()));
            }),
            ("num", &mut |(xs, _, _)| {
                no_out!(BigInt::sum(xs.into_iter()));
            }),
            ("rug", &mut |(_, xs, _)| {
                no_out!(rug::Integer::sum(xs.iter()));
            }),
        ],
    );
}

fn benchmark_integer_sum_algorithms(
    gm: GenMode,
    config: &GenConfig,
    limit: usize,
    file_name: &str,
) {
    run_benchmark(
        "Integer::sum(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::sum(xs.into_iter()))),
            ("alt", &mut |xs| no_out!(integer_sum_alt(xs.into_iter()))),
        ],
    );
}

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