use assert_fs::{prelude::*, TempDir};
use predicates::prelude::*;
#[cfg(not(target_os = "windows"))]
use rexpect::session::{spawn_command, PtySession};
use std::{error::Error, process::Command};

trait Expectations {
    fn exp_title(&mut self, title: &str) -> Result<(), Box<dyn Error>>;
}

impl Expectations for PtySession {
    fn exp_title(&mut self, title: &str) -> Result<(), Box<dyn Error>> {
        self.exp_string(&format!("Confirm title: {}", title))?;
        self.exp_regex("\\s*")?;
        Ok(())
    }
}

#[cfg(not(target_os = "windows"))]
fn setup_command() -> Result<(Command, TempDir), Box<dyn Error>> {
    let temp_dir = assert_fs::TempDir::new()?;

    let bin_path = assert_cmd::cargo::cargo_bin("memebattle_post");
    let fake_editor_path = std::env::current_dir()?
        .join("tests")
        .join("fake-editor.sh");

    if !fake_editor_path.exists() {
        panic!("fake-editor.sh does not exist")
    }

    let mut cmd = Command::new(bin_path);
    cmd.env("EDITOR", fake_editor_path.into_os_string())
        .env("DIR", temp_dir.path())
        .env("NO_COLOR", "true");

    Ok((cmd, temp_dir))
}

#[test]
fn test_help() {
    assert_cmd::Command::cargo_bin("memebattle_post")
        .unwrap()
        .arg("--help")
        .assert()
        .success()
        .stderr("");
}

#[test]
fn test_create_help() {
    assert_cmd::Command::cargo_bin("memebattle_post")
        .unwrap()
        .arg("create")
        .arg("--help")
        .assert()
        .success()
        .stderr("");
}

#[cfg(not(target_os = "windows"))]
#[test]
fn test_create_with_title() -> Result<(), Box<dyn Error>> {
    let (mut cmd, temp_dir) = setup_command()?;
    cmd.arg("create").arg("-t").arg("atitle");

    let mut process = spawn_command(cmd, Some(3000))?;

    process.exp_title("atitle")?;
    process.send_line("Y")?;
    process.exp_eof()?;

    temp_dir
        .child("atitle.md")
        .assert(predicate::path::exists());

    Ok(())
}

#[cfg(not(target_os = "windows"))]
#[test]
fn test_create_with_written_title() -> Result<(), Box<dyn Error>> {
    let (mut cmd, temp_dir) = setup_command()?;
    cmd.arg("create").arg("-t").arg("testing");

    let mut process = spawn_command(cmd, Some(3000))?;

    process.exp_title("testing")?;
    process.send_line("Y")?;
    process.exp_eof()?;

    temp_dir
        .child("testing.md")
        .assert(predicate::path::exists());

    Ok(())
}