// Copyright (c) 2023 Jan Holthuis <jan.holthuis@rub.de>
//
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy
// of the MPL was not distributed with this file, You can obtain one at
// http://mozilla.org/MPL/2.0/.
//
// SPDX-License-Identifier: MPL-2.0

use glob::glob;
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::Path;

macro_rules! write_test {
    ($output_filepath:expr, $glob_pattern:literal, $header:literal, $body_path:literal) => {
        let mut output_file = File::create($output_filepath).expect("failed to write test file");
        writeln!(output_file, $header,).expect("failed to write test file header");

        glob($glob_pattern)
            .expect("failed to read glob pattern")
            .map(|entry| entry.unwrap())
            .for_each(|path| {
                let name = path
                    .iter()
                    .skip(2)
                    .map(|component| component.to_str().unwrap())
                    .collect::<Vec<&str>>()
                    .join("_")
                    .replace(".", "_");
                eprintln!("Writing setting test: {:?}", name);

                writeln!(
                    output_file,
                    include_str!($body_path),
                    name = name,
                    filepath = path.canonicalize().unwrap().to_str().unwrap(),
                )
                .expect("failed to write test file body");
            });
    };
}

fn main() {
    // Make cargo rerun the build script if the data directory changes.
    println!("cargo:rerun-if-changed=data");

    let out_dir = env::var("OUT_DIR").unwrap();
    let out_dir = Path::new(&out_dir);
    eprintln!("Writing tests to: {:?}", out_dir);

    write_test!(
        out_dir.join("tests_pdb.rs"),
        "data/complete_export/*/PIONEER/rekordbox/export.pdb",
        r#"// THIS FILE IS AUTOGENERATED - DO NOT EDIT!
use binrw::{{BinRead}};
use rekordcrate::pdb::Header;
"#,
        "./tests/tests_pdb.rs.in"
    );

    write_test!(
        out_dir.join("tests_anlz.rs"),
        "data/complete_export/*/PIONEER/USBANLZ/*/*/ANLZ*.*",
        r#"// THIS FILE IS AUTOGENERATED - DO NOT EDIT!
use rekordcrate::anlz::ANLZ;
"#,
        "./tests/tests_anlz.rs.in"
    );

    write_test!(
        out_dir.join("tests_setting.rs"),
        "data/complete_export/*/PIONEER/*.DAT",
        r#"// THIS FILE IS AUTOGENERATED - DO NOT EDIT!
use binrw::{{BinWrite, io::Cursor}};
use rekordcrate::setting::Setting;
"#,
        "./tests/tests_setting.rs.in"
    );
}