use crate::common::util::*;
use std::path::PathBuf;

#[test]
fn test_symlink_existing_file() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_existing_file";
    let link = "test_symlink_existing_file_link";

    at.touch(file);

    ucmd.args(&["-s", file, link]).succeeds().no_stderr();

    assert!(at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);
}

#[test]
fn test_symlink_dangling_file() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_dangling_file";
    let link = "test_symlink_dangling_file_link";

    ucmd.args(&["-s", file, link]).succeeds().no_stderr();
    assert!(!at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);
}

#[test]
fn test_symlink_existing_directory() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_symlink_existing_dir";
    let link = "test_symlink_existing_dir_link";

    at.mkdir(dir);

    ucmd.args(&["-s", dir, link]).succeeds().no_stderr();
    assert!(at.dir_exists(dir));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), dir);
}

#[test]
fn test_symlink_dangling_directory() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_symlink_dangling_dir";
    let link = "test_symlink_dangling_dir_link";

    ucmd.args(&["-s", dir, link]).succeeds().no_stderr();
    assert!(!at.dir_exists(dir));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), dir);
}

#[test]
fn test_symlink_circular() {
    let (at, mut ucmd) = at_and_ucmd!();
    let link = "test_symlink_circular";

    ucmd.args(&["-s", link]).succeeds().no_stderr();
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), link);
}

#[test]
fn test_symlink_do_not_overwrite() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_do_not_overwrite";
    let link = "test_symlink_do_not_overwrite_link";

    at.touch(file);
    at.touch(link);

    ucmd.args(&["-s", file, link]).fails();
    assert!(at.file_exists(file));
    assert!(at.file_exists(link));
    assert!(!at.is_symlink(link));
}

#[test]
fn test_symlink_overwrite_force() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file_a = "test_symlink_overwrite_force_a";
    let file_b = "test_symlink_overwrite_force_b";
    let link = "test_symlink_overwrite_force_link";

    // Create symlink
    at.symlink_file(file_a, link);
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file_a);

    // Force overwrite of existing symlink
    ucmd.args(&["--force", "-s", file_b, link]).succeeds();
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file_b);
}

#[test]
fn test_symlink_interactive() {
    let scene = TestScenario::new(util_name!());
    let at = &scene.fixtures;
    let file = "test_symlink_interactive_file";
    let link = "test_symlink_interactive_file_link";

    at.touch(file);
    at.touch(link);

    scene
        .ucmd()
        .args(&["-i", "-s", file, link])
        .pipe_in("n")
        .succeeds()
        .no_stderr();

    assert!(at.file_exists(file));
    assert!(!at.is_symlink(link));

    scene
        .ucmd()
        .args(&["-i", "-s", file, link])
        .pipe_in("Yesh") // spell-checker:disable-line
        .succeeds()
        .no_stderr();

    assert!(at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);
}

#[test]
fn test_symlink_simple_backup() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_simple_backup";
    let link = "test_symlink_simple_backup_link";

    at.touch(file);
    at.symlink_file(file, link);
    assert!(at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    ucmd.args(&["-b", "-s", file, link]).succeeds().no_stderr();

    assert!(at.file_exists(file));

    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    let backup = &format!("{}~", link);
    assert!(at.is_symlink(backup));
    assert_eq!(at.resolve_link(backup), file);
}

#[test]
fn test_symlink_custom_backup_suffix() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_custom_backup_suffix";
    let link = "test_symlink_custom_backup_suffix_link";
    let suffix = "super-suffix-of-the-century";

    at.touch(file);
    at.symlink_file(file, link);
    assert!(at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    let arg = &format!("--suffix={}", suffix);
    ucmd.args(&["-b", arg, "-s", file, link])
        .succeeds()
        .no_stderr();
    assert!(at.file_exists(file));

    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    let backup = &format!("{}{}", link, suffix);
    assert!(at.is_symlink(backup));
    assert_eq!(at.resolve_link(backup), file);
}

#[test]
fn test_symlink_backup_numbering() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_backup_numbering";
    let link = "test_symlink_backup_numbering_link";

    at.touch(file);
    at.symlink_file(file, link);
    assert!(at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    ucmd.args(&["-s", "--backup=t", file, link])
        .succeeds()
        .no_stderr();
    assert!(at.file_exists(file));

    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    let backup = &format!("{}.~1~", link);
    assert!(at.is_symlink(backup));
    assert_eq!(at.resolve_link(backup), file);
}

#[test]
fn test_symlink_existing_backup() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_existing_backup";
    let link = "test_symlink_existing_backup_link";
    let link_backup = "test_symlink_existing_backup_link.~1~";
    let resulting_backup = "test_symlink_existing_backup_link.~2~";

    // Create symlink and verify
    at.touch(file);
    at.symlink_file(file, link);
    assert!(at.file_exists(file));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file);

    // Create backup symlink and verify
    at.symlink_file(file, link_backup);
    assert!(at.file_exists(file));
    assert!(at.is_symlink(link_backup));
    assert_eq!(at.resolve_link(link_backup), file);

    ucmd.args(&["-s", "--backup=nil", file, link])
        .succeeds()
        .no_stderr();
    assert!(at.file_exists(file));

    assert!(at.is_symlink(link_backup));
    assert_eq!(at.resolve_link(link_backup), file);

    assert!(at.is_symlink(resulting_backup));
    assert_eq!(at.resolve_link(resulting_backup), file);
}

#[test]
fn test_symlink_target_dir() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_ln_target_dir_dir";
    let file_a = "test_ln_target_dir_file_a";
    let file_b = "test_ln_target_dir_file_b";

    at.touch(file_a);
    at.touch(file_b);
    at.mkdir(dir);

    ucmd.args(&["-s", "-t", dir, file_a, file_b])
        .succeeds()
        .no_stderr();

    let file_a_link = &format!("{}/{}", dir, file_a);
    assert!(at.is_symlink(file_a_link));
    assert_eq!(at.resolve_link(file_a_link), file_a);

    let file_b_link = &format!("{}/{}", dir, file_b);
    assert!(at.is_symlink(file_b_link));
    assert_eq!(at.resolve_link(file_b_link), file_b);
}

#[test]
fn test_symlink_target_dir_from_dir() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_ln_target_dir_dir";
    let from_dir = "test_ln_target_dir_from_dir";
    let filename_a = "test_ln_target_dir_file_a";
    let filename_b = "test_ln_target_dir_file_b";
    let file_a = &format!("{}/{}", from_dir, filename_a);
    let file_b = &format!("{}/{}", from_dir, filename_b);

    at.mkdir(from_dir);
    at.touch(file_a);
    at.touch(file_b);
    at.mkdir(dir);

    ucmd.args(&["-s", "-t", dir, file_a, file_b])
        .succeeds()
        .no_stderr();

    let file_a_link = &format!("{}/{}", dir, filename_a);
    assert!(at.is_symlink(file_a_link));
    assert_eq!(&at.resolve_link(file_a_link), file_a);

    let file_b_link = &format!("{}/{}", dir, filename_b);
    assert!(at.is_symlink(file_b_link));
    assert_eq!(&at.resolve_link(file_b_link), file_b);
}

#[test]
fn test_symlink_overwrite_dir_fail() {
    let (at, mut ucmd) = at_and_ucmd!();
    let path_a = "test_symlink_overwrite_dir_a";
    let path_b = "test_symlink_overwrite_dir_b";

    at.touch(path_a);
    at.mkdir(path_b);

    assert!(!ucmd
        .args(&["-s", "-T", path_a, path_b])
        .fails()
        .stderr_str()
        .is_empty());
}

#[test]
fn test_symlink_errors() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_symlink_errors_dir";
    let file_a = "test_symlink_errors_file_a";
    let file_b = "test_symlink_errors_file_b";

    at.mkdir(dir);
    at.touch(file_a);
    at.touch(file_b);

    // $ ln -T -t a b
    // ln: cannot combine --target-directory (-t) and --no-target-directory (-T)
    ucmd.args(&["-T", "-t", dir, file_a, file_b]).fails();
}

#[test]
fn test_symlink_verbose() {
    let scene = TestScenario::new(util_name!());
    let at = &scene.fixtures;
    let file_a = "test_symlink_verbose_file_a";
    let file_b = "test_symlink_verbose_file_b";

    at.touch(file_a);

    scene
        .ucmd()
        .args(&["-v", file_a, file_b])
        .succeeds()
        .stdout_only(format!("'{}' -> '{}'\n", file_b, file_a));

    at.touch(file_b);

    scene
        .ucmd()
        .args(&["-v", "-b", file_a, file_b])
        .succeeds()
        .stdout_only(format!(
            "'{}' -> '{}' (backup: '{}~')\n",
            file_b, file_a, file_b
        ));
}

#[test]
fn test_symlink_target_only() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_symlink_target_only";

    at.mkdir(dir);

    assert!(!ucmd
        .args(&["-s", "-t", dir])
        .fails()
        .stderr_str()
        .is_empty());
}

#[test]
fn test_symlink_implicit_target_dir() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_symlink_implicit_target_dir";
    // On windows, slashes aren't allowed in symlink targets, so use
    // PathBuf to construct `file` instead of simple "dir/file".
    let filename = "test_symlink_implicit_target_file";
    let path = PathBuf::from(dir).join(filename);
    let file = &path.to_string_lossy();

    at.mkdir(dir);
    at.touch(file);

    ucmd.args(&["-s", file]).succeeds().no_stderr();

    assert!(at.file_exists(filename));
    assert!(at.is_symlink(filename));
    assert_eq!(at.resolve_link(filename), *file);
}

#[test]
fn test_symlink_to_dir_2args() {
    let (at, mut ucmd) = at_and_ucmd!();
    let filename = "test_symlink_to_dir_2args_file";
    let from_file = &format!("{}/{}", at.as_string(), filename);
    let to_dir = "test_symlink_to_dir_2args_to_dir";
    let to_file = &format!("{}/{}", to_dir, filename);

    at.mkdir(to_dir);
    at.touch(from_file);

    ucmd.args(&["-s", from_file, to_dir]).succeeds().no_stderr();

    assert!(at.file_exists(to_file));
    assert!(at.is_symlink(to_file));
    assert_eq!(at.resolve_link(to_file), filename);
}

#[test]
fn test_symlink_missing_destination() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_symlink_missing_destination";

    at.touch(file);

    ucmd.args(&["-s", "-T", file]).fails().stderr_is(format!(
        "ln: missing destination file operand after '{}'",
        file
    ));
}

#[test]
fn test_symlink_relative() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file_a = "test_symlink_relative_a";
    let link = "test_symlink_relative_link";

    at.touch(file_a);

    // relative symlink
    ucmd.args(&["-r", "-s", file_a, link]).succeeds();
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file_a);
}

#[test]
fn test_symlink_relative_path() {
    let (at, mut ucmd) = at_and_ucmd!();
    let dir = "test_symlink_existing_dir";
    let file_a = "test_symlink_relative_a";
    let link = "test_symlink_relative_link";
    let multi_dir =
        "test_symlink_existing_dir/../test_symlink_existing_dir/../test_symlink_existing_dir/../";
    let p = PathBuf::from(multi_dir).join(file_a);
    at.mkdir(dir);

    // relative symlink
    // Thanks to -r, all the ../ should be resolved to a single file
    ucmd.args(&["-r", "-s", "-v", &p.to_string_lossy(), link])
        .succeeds()
        .stdout_only(format!("'{}' -> '{}'\n", link, file_a));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file_a);

    // Run the same command without -r to verify that we keep the full
    // crazy path
    let (at, mut ucmd) = at_and_ucmd!();
    ucmd.args(&["-s", "-v", &p.to_string_lossy(), link])
        .succeeds()
        .stdout_only(format!("'{}' -> '{}'\n", link, &p.to_string_lossy()));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), p.to_string_lossy());
}

#[test]
fn test_symlink_relative_dir() {
    let (at, mut ucmd) = at_and_ucmd!();

    let dir = "test_symlink_existing_dir";
    let link = "test_symlink_existing_dir_link";

    at.mkdir(dir);

    ucmd.args(&["-s", "-r", dir, link]).succeeds().no_stderr();
    assert!(at.dir_exists(dir));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), dir);
}

#[test]
fn test_symlink_no_deref_dir() {
    let scene = TestScenario::new(util_name!());
    let at = &scene.fixtures;

    let dir1 = "foo";
    let dir2 = "bar";
    let link = "baz";

    at.mkdir(dir1);
    at.mkdir(dir2);
    scene
        .ucmd()
        .args(&["-s", dir2, link])
        .succeeds()
        .no_stderr();
    assert!(at.dir_exists(dir1));
    assert!(at.dir_exists(dir2));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), dir2);

    // try the normal behavior
    scene
        .ucmd()
        .args(&["-sf", dir1, link])
        .succeeds()
        .no_stderr();
    assert!(at.dir_exists(dir1));
    assert!(at.dir_exists(dir2));
    assert!(at.is_symlink("baz/foo"));
    assert_eq!(at.resolve_link("baz/foo"), dir1);

    // Doesn't work without the force
    scene.ucmd().args(&["-sn", dir1, link]).fails();

    // Try with the no-deref
    scene.ucmd().args(&["-sfn", dir1, link]).succeeds();
    assert!(at.dir_exists(dir1));
    assert!(at.dir_exists(dir2));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), dir1);
}

#[test]
fn test_symlink_no_deref_file() {
    let scene = TestScenario::new(util_name!());
    let at = &scene.fixtures;

    let file1 = "foo";
    let file2 = "bar";
    let link = "baz";

    at.touch(file1);
    at.touch(file2);
    scene
        .ucmd()
        .args(&["-s", file2, link])
        .succeeds()
        .no_stderr();
    assert!(at.file_exists(file1));
    assert!(at.file_exists(file2));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file2);

    // try the normal behavior
    scene
        .ucmd()
        .args(&["-sf", file1, link])
        .succeeds()
        .no_stderr();
    assert!(at.file_exists(file1));
    assert!(at.file_exists(file2));
    assert!(at.is_symlink("baz"));
    assert_eq!(at.resolve_link("baz"), file1);

    // Doesn't work without the force
    scene.ucmd().args(&["-sn", file1, link]).fails();

    // Try with the no-deref
    scene.ucmd().args(&["-sfn", file1, link]).succeeds();
    assert!(at.file_exists(file1));
    assert!(at.file_exists(file2));
    assert!(at.is_symlink(link));
    assert_eq!(at.resolve_link(link), file1);
}

#[test]
fn test_relative_requires_symbolic() {
    new_ucmd!().args(&["-r", "foo", "bar"]).fails();
}

#[test]
fn test_relative_dst_already_symlink() {
    let (at, mut ucmd) = at_and_ucmd!();
    at.touch("file1");
    at.symlink_file("file1", "file2");
    ucmd.arg("-srf").arg("file1").arg("file2").succeeds();
    at.is_symlink("file2");
}

#[test]
fn test_relative_src_already_symlink() {
    let (at, mut ucmd) = at_and_ucmd!();
    at.touch("file1");
    at.symlink_file("file1", "file2");
    ucmd.arg("-sr").arg("file2").arg("file3").succeeds();
    assert!(at.resolve_link("file3").ends_with("file1"));
}