package tests;

import static io.kojan.runit.api.RUnit.*;
import static org.hamcrest.Matchers.*;

import java.nio.file.Path;
import java.util.Arrays;

import org.junit.jupiter.api.DisplayName;

import io.kojan.javadeptools.rpm.*;
import io.kojan.runit.api.*;

@DisplayName("/file")
public class FileCheck {

    @FileTest
    @IncludeRegularFile
    @ExcludeBinary(".*-debuginfo")
    public void elvesLiveInUserLib(RpmInfo rpm, Path path, byte[] data, RpmFile entry) {
        assumeThat("File is not too small to be ELF", entry.getSize(), is(greaterThanOrEqualTo(4L)));
        assumeThat("ELF magic is present", Arrays.copyOfRange(data, 0, 4), is(new byte[] { 0x7f, 'E', 'L', 'F' }));
        assertThat("ELF files must be under /usr/lib", path.toString(), startsWith("/usr/lib/"));
        assertThat("Noarch packages must not contain ELF files", rpm.getArch(), is(not("noarch")));
    }

    @FileTest
    @IncludeBinary
    @ExcludeBinary(".*-debuginfo")
    public void modeTest(RpmInfo rpm, Path path, byte[] data, RpmFile entry) throws Exception {
        String mode = Integer.toOctalString((int) entry.getMode() & 07777);
        if (entry.isRegularFile()) {
            if (entry.getSize() >= 4 && data[0] == 0x7f && data[1] == 'E' && data[2] == 'L' && data[3] == 'F') {
                assertThat("ELF files must have mode 755", mode, is("755"));
            } else if (entry.getSize() >= 2 && data[0] == '#' && data[1] == '!') {
                assertThat("Files with shebang must have mode 755", mode, is("755"));
            } else if (entry.getSize() == 0) {
                assertThat("Empty files must have mode 644 or 0", mode, either(is("644")).or(is("0")));
            } else {
                assertThat("Other regular files must have mode 644", mode, is("644"));
            }
        } else if (entry.isDirectory()) {
            assertThat("Directories must have mode 755", mode, is("755"));
        } else if (!entry.isSymbolicLink()) {
            assertThat("Not a regular file, not a symlink and not a directory", false, is(true));
        }
    }

}