use assert_cmd::Command;
use std::str;

mod tests_symlinks;

//  Warning: File sizes differ on both platform and on the format of the disk.
/// Copy to /tmp dir - we assume that the formatting of the /tmp partition
/// is consistent. If the tests fail your /tmp filesystem probably differs
fn copy_test_data(dir: &str) {
    match Command::new("cp").arg("-r").arg(dir).arg("/tmp/").ok() {
        Ok(_) => {}
        Err(err) => {
            eprintln!("Error copying directory {:?}", err);
        }
    };
}

// We can at least test the file names are there
#[test]
pub fn test_basic_output() {
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let output = cmd.arg("src/test_dir/").unwrap().stdout;
    let output = str::from_utf8(&output).unwrap();

    assert!(output.contains(" ┌─┴ "));
    assert!(output.contains("test_dir "));
    assert!(output.contains("  ┌─┴ "));
    assert!(output.contains("many "));
    assert!(output.contains("    ├── "));
    assert!(output.contains("hello_file"));
    assert!(output.contains("     ┌── "));
    assert!(output.contains("a_file "));
}

// "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
#[cfg_attr(target_os = "windows", ignore)]
#[test]
pub fn test_main_basic() {
    copy_test_data("src/test_dir");
    // -c is no color mode - This makes testing much simpler
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let assert = cmd.arg("-c").arg("/tmp/test_dir/").unwrap().stdout;
    let output = str::from_utf8(&assert).unwrap();
    assert!(output.contains(&main_output()));
}

#[cfg_attr(target_os = "windows", ignore)]
#[test]
pub fn test_main_multi_arg() {
    copy_test_data("src/test_dir");

    let mut cmd = Command::cargo_bin("dust").unwrap();
    let assert = cmd
        .arg("-c")
        .arg("/tmp/test_dir/many/")
        .arg("/tmp/test_dir")
        .arg("/tmp/test_dir")
        .unwrap()
        .stdout;
    let output = str::from_utf8(&assert).unwrap();
    assert!(output.contains(&main_output()));
}

#[cfg(target_os = "macos")]
fn main_output() -> String {
    r#"
   0B     ┌── a_file    │░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░█ │   0%
 4.0K     ├── hello_file│██████████████████████████████████████████████ │ 100%
 4.0K   ┌─┴ many        │██████████████████████████████████████████████ │ 100%
 4.0K ┌─┴ test_dir      │██████████████████████████████████████████████ │ 100%
 "#
    .trim()
    .to_string()
}

#[cfg(target_os = "linux")]
fn main_output() -> String {
    r#"
   0B     ┌── a_file    │               ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░█ │   0%
 4.0K     ├── hello_file│               ░░░░░░░░░░░░░░░████████████████ │  33%
 8.0K   ┌─┴ many        │               ███████████████████████████████ │  67%
  12K ┌─┴ test_dir      │██████████████████████████████████████████████ │ 100%
  "#
    .trim()
    .to_string()
}

#[cfg(target_os = "windows")]
fn main_output() -> String {
    "windows results vary by host".to_string()
}

#[cfg_attr(target_os = "windows", ignore)]
#[test]
pub fn test_main_long_paths() {
    copy_test_data("src/test_dir");

    let mut cmd = Command::cargo_bin("dust").unwrap();
    let assert = cmd
        .arg("-c")
        .arg("-p")
        .arg("/tmp/test_dir/")
        .unwrap()
        .stdout;
    let output = str::from_utf8(&assert).unwrap();
    assert!(output.contains(&main_output_long_paths()));
}

#[cfg(target_os = "macos")]
fn main_output_long_paths() -> String {
    r#"
   0B     ┌── /tmp/test_dir/many/a_file    │░░░░░░░░░░░░░░░░░░░░░░░░░░█ │   0%
 4.0K     ├── /tmp/test_dir/many/hello_file│███████████████████████████ │ 100%
 4.0K   ┌─┴ /tmp/test_dir/many             │███████████████████████████ │ 100%
 4.0K ┌─┴ /tmp/test_dir                    │███████████████████████████ │ 100%
"#
    .trim()
    .to_string()
}

#[cfg(target_os = "linux")]
fn main_output_long_paths() -> String {
    r#"   
   0B     ┌── /tmp/test_dir/many/a_file    │        ░░░░░░░░░░░░░░░░░░█ │   0%
 4.0K     ├── /tmp/test_dir/many/hello_file│        ░░░░░░░░░██████████ │  33%
 8.0K   ┌─┴ /tmp/test_dir/many             │        ███████████████████ │  67%
  12K ┌─┴ /tmp/test_dir                    │███████████████████████████ │ 100%
"#
    .trim()
    .to_string()
}

#[cfg(target_os = "windows")]
fn main_output_long_paths() -> String {
    "windows results vary by host".to_string()
}

#[cfg_attr(target_os = "windows", ignore)]
#[test]
pub fn test_apparent_size() {
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let assert = cmd.arg("-c").arg("-s").arg("src/test_dir").unwrap().stdout;
    let output = str::from_utf8(&assert).unwrap();
    assert!(output.contains(&output_apparent_size()));
}

#[cfg(target_os = "linux")]
fn output_apparent_size() -> String {
    r#"
   0B     ┌── a_file    │                      ░░░░░░░░░░░░░░░░░░░░░░░█ │   0%
   6B     ├── hello_file│                      ░░░░░░░░░░░░░░░░░░░░░░░█ │   0%
 4.0K   ┌─┴ many        │                      ████████████████████████ │  50%
 8.0K ┌─┴ test_dir      │██████████████████████████████████████████████ │ 100%     
"#
    .trim()
    .to_string()
}

#[cfg(target_os = "macos")]
fn output_apparent_size() -> String {
    r#"
   0B     ┌── a_file    │                   ░░░░░░░░░░░░░░░░░░░░░░░░░░█ │   0%
   6B     ├── hello_file│                   ░░░░░░░░░░░░░░░░░░░░░░░░░██ │   3%
 134B   ┌─┴ many        │                   ███████████████████████████ │  58%
 230B ┌─┴ test_dir      │██████████████████████████████████████████████ │ 100%
"#
    .trim()
    .to_string()
}

#[cfg(target_os = "windows")]
fn output_apparent_size() -> String {
    "windows results vary by host".to_string()
}

#[test]
pub fn test_reverse_flag() {
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let output = cmd.arg("-c").arg("-r").arg("src/test_dir/").unwrap().stdout;
    let output = str::from_utf8(&output).unwrap();

    assert!(output.contains(" └─┬ test_dir "));
    assert!(output.contains("  └─┬ many "));
    assert!(output.contains("    ├── hello_file"));
    assert!(output.contains("    └── a_file "));
}

#[test]
pub fn test_d_flag_works() {
    // We should see the top level directory but not the sub dirs / files:
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let output = cmd
        .arg("-d")
        .arg("1")
        .arg("-s")
        .arg("src/test_dir/")
        .unwrap()
        .stdout;
    let output = str::from_utf8(&output).unwrap();
    assert!(!output.contains("hello_file"));
}

// Check against directories and files whos names are substrings of each other
#[cfg_attr(target_os = "windows", ignore)]
#[test]
pub fn test_substring_of_names() {
    copy_test_data("src/test_dir2");

    let mut cmd = Command::cargo_bin("dust").unwrap();
    let output = cmd.arg("-c").arg("/tmp/test_dir2").unwrap().stdout;
    let output = str::from_utf8(&output).unwrap();
    assert!(output.contains(&no_substring_of_names_output()));
}

#[cfg(target_os = "linux")]
fn no_substring_of_names_output() -> String {
    "
 4.0K   ┌── dir_name_clash│                                    ████████ │  17%
 4.0K   │ ┌── hello       │                             ░░░░░░░████████ │  17%
 8.0K   ├─┴ dir_substring │                             ███████████████ │  33%
 4.0K   │ ┌── hello       │                             ░░░░░░░████████ │  17%
 8.0K   ├─┴ dir           │                             ███████████████ │  33%
  24K ┌─┴ test_dir2       │████████████████████████████████████████████ │ 100% 
    "
    .trim()
    .into()
}

#[cfg(target_os = "macos")]
fn no_substring_of_names_output() -> String {
    "
 4.0K     ┌── hello       │                             ███████████████ │  33%
 4.0K   ┌─┴ dir_substring │                             ███████████████ │  33%
 4.0K   ├── dir_name_clash│                             ███████████████ │  33%
 4.0K   │ ┌── hello       │                             ███████████████ │  33%
 4.0K   ├─┴ dir           │                             ███████████████ │  33%
  12K ┌─┴ test_dir2       │████████████████████████████████████████████ │ 100% 
  "
    .trim()
    .into()
}

#[cfg(target_os = "windows")]
fn no_substring_of_names_output() -> String {
    "PRs".into()
}

#[cfg_attr(target_os = "windows", ignore)]
#[test]
pub fn test_unicode_directories() {
    copy_test_data("src/test_dir3");

    let mut cmd = Command::cargo_bin("dust").unwrap();
    let output = cmd.arg("-c").arg("/tmp/test_dir3").unwrap().stdout;
    let output = str::from_utf8(&output).unwrap();
    assert!(output.contains(&unicode_dir()));
}

#[cfg(target_os = "linux")]
fn unicode_dir() -> String {
    // The way unicode & asian characters are rendered on the terminal should make this line up
    "
   0B   ┌── 👩.unicode                │                               █ │   0%
   0B   ├── ラウトは難しいです！.japan│                               █ │   0%
 4.0K ┌─┴ test_dir3                   │████████████████████████████████ │ 100%
    "
    .trim()
    .into()
}

#[cfg(target_os = "macos")]
fn unicode_dir() -> String {
    "
   0B   ┌── 👩.unicode                │                               █ │   0%
   0B   ├── ラウトは難しいです！.japan│                               █ │   0%
   0B ┌─┴ test_dir3                   │                               █ │   0%
    "
    .trim()
    .into()
}

#[cfg(target_os = "windows")]
fn unicode_dir() -> String {
    "".into()
}

// Check against directories and files whos names are substrings of each other
#[test]
pub fn test_ignore_dir() {
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let output = cmd
        .arg("-c")
        .arg("-X")
        .arg("dir_substring")
        .arg("src/test_dir3")
        .unwrap()
        .stdout;
    let output = str::from_utf8(&output).unwrap();
    assert!(!output.contains("dir_substring"));
}

#[test]
pub fn test_with_bad_param() {
    let mut cmd = Command::cargo_bin("dust").unwrap();
    let stderr = cmd.arg("-").unwrap().stderr;
    let stderr = str::from_utf8(&stderr).unwrap();
    assert!(stderr.contains("Did not have permissions for all directories"));
}