// Copyright (c) 2011 Jan Kokemüller
// Copyright (c) 2020 Sebastian Dröge <sebastian@centricular.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

use std::fs;
use std::io::prelude::*;
use std::path::PathBuf;

fn main() {
    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
    path.push("src");
    path.push("histogram_bins.rs");

    let mut contents = Vec::new();

    let mut energies = [0.0f64; 1000];
    for (i, o) in energies.iter_mut().enumerate() {
        *o = f64::powf(10.0, (i as f64 / 10.0 - 69.95 + 0.691) / 10.0);
    }

    let mut boundaries = [0.0f64; 1001];
    for (i, o) in boundaries.iter_mut().enumerate() {
        *o = f64::powf(10.0, (i as f64 / 10.0 - 70.0 + 0.691) / 10.0);
    }

    write!(
        &mut contents,
        "\
// Copyright (c) 2011 Jan Kokemüller
// Copyright (c) 2020 Sebastian Dröge <sebastian@centricular.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the \"Software\"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

// DO NOT EDIT: This file is autogenerated by `examples/generate_histogram_bins.rs`

/// Histogram energies, i.e. energy at the center of each histogram bin.
pub static ENERGIES: [f64; 1000] = {energies:#.prec$?};

/// Histogram boundaries, i.e. the energies between each histogram bin.
pub static BOUNDARIES: [f64; 1001] = {boundaries:#.prec$?};
",
        energies = &energies[..],
        boundaries = &boundaries[..],
        prec = 36,
    )
    .expect("Failed to format file contents");

    fs::write(path, contents).expect("Failed to write file");
}