#![cfg_attr(all(feature = "bench", test), feature(test))]

#[cfg(all(feature = "bench", test))]
mod bench {
    extern crate test;
    use test::Bencher;

    use std::fs::{OpenOptions, remove_file};

    use adafruit_gps::GpsSentence;
    use adafruit_gps::gga::{GgaData, SatFix};

    const SENTENCE: GpsSentence = GpsSentence::GGA(GgaData {
        utc: 100.0,
        lat: Some(51.55465),
        long: Some(-0.05632),
        sat_fix: SatFix::DgpsFix,
        satellites_used: 4,
        hdop: Some(1.453),
        msl_alt: Some(42.53),
        geoidal_sep: Some(47.0),
        age_diff_corr: None,
    });

    const VECTOR_SIZE: i32 = 1_000;

    #[bench]
    fn bench_write_vector(b: &mut Bencher) {
        let mut v = Vec::new();
        for _ in 0..VECTOR_SIZE {
            v.push(SENTENCE)
        }

        b.iter(|| {
            for s in v.iter() {
                s.clone().append_to("bench_test1")
            }
            let _ = remove_file("bench_test1");
        });
    }

    #[bench]
    fn bench_append(b: &mut Bencher) {
        b.iter(|| {
            for _ in 0..VECTOR_SIZE {
                SENTENCE.append_to("bench_test2")
            }
            let _ = remove_file("bench_test2");
        });
    }

    #[bench]
    fn bench_append_single_struct(b: &mut Bencher) {
        b.iter(|| {
            for _ in 0..1 {
                SENTENCE.append_to("bench_test2")
            }
            let _ = remove_file("bench_test2");
        });
    }

    #[bench]
    fn bench_open_remove_file(b: &mut Bencher) {
        b.iter(|| {
            let _f = OpenOptions::new().append(true).create(true).open("test_remove_file").unwrap();
            let _ = remove_file("test_remove_file");
        })
    }

    #[bench]
    fn bench_read(b: &mut Bencher) {
        for _ in 0..VECTOR_SIZE {
            SENTENCE.append_to("bench_read")
        }

        b.iter(|| {
            GpsSentence::read_from("bench_read")
        });
        let _ = remove_file("bench_read");
    }
}

// 10 vec size
//running 4 tests
// open,append,write,open,append         ... bench: 7,226,068,625 ns/iter (+/- 62,822,335)
// write a vector at once                ... bench:     627,288 ns/iter (+/- 77,663)

// 10 vec size
//test bench_append ... bench:     524,309 ns/iter (+/- 699,760)
// test bench_read   ... bench:      38,062 ns/iter (+/- 64,274)
// test bench_vector ... bench:     628,855 ns/iter (+/- 1,559,046)

// 1_000 vec size
// test bench::bench_append               ... bench:  60,682,417 ns/iter (+/- 20,183,738)
// test bench::bench_read                 ... bench:     381,251 ns/iter (+/- 408,040)
// test bench::bench_write_vector         ... bench:  59,685,097 ns/iter (+/- 36,056,185)

// 1_000_000 vec size