use goblin::archive::*;
use scroll::Pread;
use std::path::Path;
use std::fs::File;

#[test]
fn parse_file_header() {
    let file_header: [u8; SIZEOF_HEADER] = [0x2f, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
                                            0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
                                            0x20, 0x20, 0x30, 0x20, 0x20, 0x20, 0x20,
                                            0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
                                            0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x30,
                                            0x20, 0x20, 0x20, 0x20, 0x20, 0x30, 0x20,
                                            0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x38,
                                            0x32, 0x34, 0x34, 0x20, 0x20, 0x20, 0x20,
                                            0x20, 0x20, 0x60, 0x0a];
    let buffer = &file_header[..];
    match buffer.pread::<MemberHeader>(0) {
        Err(e) => panic!("could not read the buffer: {:?}", e),
        Ok(file_header2) => {
            let file_header = MemberHeader {
                identifier: [0x2f,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,],
                timestamp: [48, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32],
                owner_id: [48, 32, 32, 32, 32, 32],
                group_id: [48, 32, 32, 32, 32, 32],
                mode: [48, 32, 32, 32, 32, 32, 32, 32],
                file_size: [56, 50, 52, 52, 32, 32, 32, 32, 32, 32],
                terminator: [96, 10] };
            assert_eq!(file_header, file_header2)
        }
    }
}

#[test]
fn parse_archive() {
    let crt1a: Vec<u8> = include!("../etc/crt1a.rs");
    const START: &str = "_start";
    match Archive::parse(&crt1a) {
        Ok(archive) => {
            assert_eq!(archive.member_of_symbol(START), Some("crt1.o"));
            if let Some(member) = archive.get("crt1.o") {
                assert_eq!(member.offset, 194);
                assert_eq!(member.size(), 1928)
            } else {
                panic!("could not get crt1.o");
            }
        },
        Err(err) => panic!("could not parse archive: {:?}", err),
    };
}

#[test]
fn parse_self() {
    use std::fs;
    use std::io::Read;
    let mut path = Path::new("target").join("debug").join("libgoblin.rlib");
    // https://github.com/m4b/goblin/issues/63
    if fs::metadata(&path).is_err() {
        path = Path::new("target").join("release").join("libgoblin.rlib");
    }
    let buffer = {
        let mut fd = File::open(path).expect("can open file; did you run cargo build first?");
        let mut v = Vec::new();
        fd.read_to_end(&mut v).expect("read file");
        v
    };

    let archive = Archive::parse(&buffer).expect("parse rlib");

    // check that the archive has a useful symbol table by counting the total number of symbols
    let symbol_count: usize = archive.summarize().into_iter()
        .map(|(_member_name, _member_index, ref symbols)| symbols.len())
        .sum();
    assert!(symbol_count > 500);

    let goblin_object_name = archive.members()
        .into_iter()
        .find(|member| {
            println!("member: {:?}", member);
            member.ends_with("goblin-archive.o")    // < 1.18
                || (member.starts_with("goblin") && member.ends_with("0.o")) // >= 1.18 && < 1.22
                || (member.starts_with("goblin") && member.ends_with("rust-cgu.o")) // = 1.22
                || (member.starts_with("goblin") && member.ends_with("rcgu.o")) // >= nightly 1.23
        })
        .expect("goblin-<hash>.0.o not found");

    let bytes = archive.extract(goblin_object_name, &buffer).expect("extract goblin object");
    match goblin::Object::parse(&bytes).expect("parse object") {
        goblin::Object::Elf(elf) => {
            assert!(elf.entry == 0);
        }
        goblin::Object::Mach(goblin::mach::Mach::Binary(macho)) => {
            assert_eq!(macho.header.filetype, goblin::mach::header::MH_OBJECT);
            assert_eq!(macho.entry, 0);
        }
        other => {
            panic!("unexpected Object::parse result: {:?}", other);
        }
    }
}