use criterion::{criterion_group, criterion_main, Criterion};

macro_rules! group_decode {
    ($criterion:ident, $name:expr, $encoded:expr => $decoded:expr, $decoded_length:expr) => {{
        let mut group = $criterion.benchmark_group($name);
        group.bench_function("decode_base58", |b| {
            use base58::FromBase58;
            let temp = $encoded;
            b.iter(|| temp.from_base58().unwrap());
        });
        group.bench_function("decode_rust_base58", |b| {
            use rust_base58::FromBase58;
            let temp = $encoded;
            b.iter(|| temp.from_base58().unwrap());
        });
        group.bench_function("decode_bs58", |b| {
            b.iter(|| bs58::decode($encoded).into_vec().unwrap())
        });
        group.bench_function("decode_bs58_noalloc_slice", |b| {
            let mut output = [0; $decoded_length];
            b.iter(|| bs58::decode($encoded).onto(&mut output[..]).unwrap());
        });
        group.bench_function("decode_bs58_noalloc_array", |b| {
            let mut output = [0; $decoded_length];
            b.iter(|| bs58::decode($encoded).onto(&mut output).unwrap());
        });
        group.finish();
    }};
}

macro_rules! group_decode_long {
    ($criterion:ident, $name:expr, $encoded:expr => $decoded:expr, $decoded_length:expr) => {{
        let mut group = $criterion.benchmark_group($name);
        // base58 can't handle more than 32 bytes
        group.bench_function("decode_rust_base58", |b| {
            use rust_base58::FromBase58;
            let temp = $encoded;
            b.iter(|| temp.from_base58().unwrap());
        });
        group.bench_function("decode_bs58", |b| {
            b.iter(|| bs58::decode($encoded).into_vec().unwrap())
        });
        group.bench_function("decode_bs58_noalloc_slice", |b| {
            let mut output = [0; $decoded_length];
            b.iter(|| bs58::decode($encoded).onto(&mut output[..]).unwrap());
        });
        // bs58_noalloc_array is not possible because of limited array lengths in trait impls
        group.finish();
    }};
}

fn bench_decode(c: &mut Criterion) {
    group_decode!(c, "empty", "" => vec![], 0);
    group_decode!(c, "1_byte", "2g" => vec![0x61], 1);
    group_decode!(c, "5_bytes", "ABnLTmg" => vec![0x51, 0x6b, 0x6f, 0xcd, 0x0f], 5);
    group_decode!(c, "10_bytes", "EJDM8drfXA6uyA" => vec![0xec, 0xac, 0x89, 0xca, 0xd9, 0x39, 0x23, 0xc0, 0x23, 0x21], 10);
    group_decode!(c, "10_bytes_zero", "1111111111" => vec![0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], 10);
    group_decode!(c, "10_bytes_max", "FPBt6CHo3fovdL" => vec![0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff], 10);
    group_decode!(c, "32_bytes", "2gPihUTjt3FJqf1VpidgrY5cZ6PuyMccGVwQHRfjMPZG" =>
        vec![
            0x18, 0xf3, 0x06, 0xdf, 0xe6, 0x99, 0xd2, 0x08, 0x5c, 0x89, 0x7b, 0x43,
            0xa4, 0xc5, 0x4f, 0xc4, 0x7d, 0x2b, 0xb7, 0x55, 0x67, 0x5b, 0xe8, 0xa7,
            0x49, 0x83, 0x68, 0x83, 0x00, 0x65, 0xd6, 0xe7
        ], 32
    );
    group_decode_long!(c, "256_bytes", "\
        5gkXES6JSFLhJ3pkwQsV3MT3TBjsW5vQnAW8CwPLS1oDsJgjq8dchz994yCJHD1C16k3Pk\
        Gp8o61dMfXy1vVwXcD147ix2BXD87xcXGnzB4mxaUEvgqDonZz8xQE9XL44XvLQshJw7kp\
        54MkSPbVkxvzKdxiYHkgAjLfmx5wdyDNjPu2DUYmxRrTtjDw5QVMaqAp3fLrQ6GnXuhZmB\
        Jdj8rTprjADLM5tox6tHgyj2bm37ECxKevEapzy4nDGmZrzMubp9s58TsV1wk3LUQsRF49\
        L9NzDatxVUetHTjQennpEHEuMTU9D8GM6De44J7Sk5fnJGh614ZtmrYyFcCE3X5mdTwaxA\
        " =>
        vec![
            0x65, 0x5f, 0x65, 0x20, 0xc4, 0xd8, 0xa5, 0x86, 0xce, 0x80, 0x1a, 0x4e,
            0x60, 0x73, 0x91, 0x40, 0x10, 0x8f, 0xd5, 0xdc, 0x5b, 0x3e, 0x8e, 0x08,
            0x47, 0x98, 0x82, 0xc6, 0x29, 0xee, 0x49, 0x8d, 0xb6, 0x41, 0xa1, 0xc6,
            0xa9, 0xd3, 0x63, 0xcb, 0xe2, 0x4e, 0x3f, 0x90, 0x78, 0x04, 0xf4, 0x49,
            0x5c, 0x4b, 0x39, 0x73, 0x9b, 0x5c, 0x4b, 0x9f, 0x23, 0xde, 0xc4, 0x8a,
            0x3d, 0xb8, 0x1a, 0x6c, 0xfd, 0x5a, 0xc1, 0xe3, 0x28, 0x9a, 0xf6, 0x72,
            0xfb, 0x2d, 0x33, 0x9d, 0xb6, 0xc4, 0x38, 0xfa, 0x8d, 0x16, 0xc9, 0x0d,
            0x00, 0xab, 0xc7, 0x9a, 0x27, 0xd2, 0x8e, 0x45, 0xdc, 0x49, 0x8d, 0xf9,
            0x80, 0x86, 0x11, 0x91, 0x86, 0x98, 0xcc, 0xc2, 0x6e, 0x85, 0xd2, 0x38,
            0xfc, 0xff, 0x66, 0xf0, 0x9d, 0x7d, 0xa5, 0x4c, 0x6f, 0x0d, 0xe5, 0xd0,
            0x60, 0x6c, 0xe7, 0x31, 0x38, 0xa0, 0x86, 0xde, 0x24, 0x28, 0x05, 0x6c,
            0x03, 0xb6, 0x21, 0xde, 0xaa, 0x8b, 0x81, 0xcc, 0xb6, 0x0e, 0x19, 0xdc,
            0xe5, 0x50, 0xb5, 0xb7, 0x6e, 0x8f, 0x22, 0xa7, 0x6f, 0x86, 0x75, 0x06,
            0xb8, 0xca, 0xa0, 0xc6, 0x29, 0x8f, 0xf6, 0xc4, 0x8b, 0x22, 0x24, 0xc0,
            0xf7, 0x09, 0x10, 0x6f, 0x10, 0x8a, 0xc2, 0x57, 0x90, 0x50, 0x62, 0x9e,
            0x95, 0x4c, 0x47, 0x79, 0xdb, 0xc9, 0x82, 0x9f, 0x45, 0xac, 0x8b, 0x31,
            0xa4, 0xfb, 0x6b, 0xdd, 0x86, 0x7f, 0x9b, 0x6f, 0x48, 0xe4, 0x34, 0x84,
            0x0c, 0x45, 0x6c, 0xfa, 0xa3, 0x14, 0x52, 0x22, 0x46, 0xf9, 0x20, 0x5f,
            0x6a, 0xb4, 0x25, 0x09, 0xb1, 0xae, 0x04, 0x3f, 0x27, 0xa0, 0xda, 0xb6,
            0x91, 0x45, 0x09, 0x37, 0xf1, 0x17, 0x2d, 0xb8, 0xa8, 0xaa, 0x5a, 0x61,
            0xf1, 0xbe, 0x08, 0x40, 0x47, 0xa8, 0x16, 0xf9, 0xb0, 0x0f, 0x6d, 0x34,
            0x62, 0x29, 0x2b, 0xb3
        ], 256
    );
}

criterion_group!(benches, bench_decode);
criterion_main!(benches);