use assert_cmd::prelude::*;
use assert_fs::prelude::*;
use predicates::prelude::*;

use std::fs;
use std::io::Write;
use std::path::{Path};
use std::process::{Command};

fn empty_dir() -> Result<assert_fs::TempDir, assert_fs::fixture::FixtureError> {
    let dir = assert_fs::TempDir::new()?;
    Ok(dir)
}

fn init_dir(dir: &Path) -> Result<(), assert_cmd::cargo::CargoError> {
    let mut cmd = Command::cargo_bin("nancy")?;
    cmd.arg("init")
        .arg("--name").arg("Temporary data directory")
        .arg(dir)
        .assert()
        .success();

    Ok(())
}

fn add_some_files(dir: &Path) -> Result<(), Box<dyn std::error::Error>> {
    let subdir = dir.join("foo").join("bar");
    let bazpath = subdir.join("baz.txt");
    fs::create_dir_all(subdir)?;
    let mut bazfile = fs::File::create(bazpath)?;
    write!(
        bazfile,
        "{}",
        "bat",
    )?;
        
    Ok(())
}

#[test]
fn init_missing_dir() -> Result<(), Box<dyn std::error::Error>> {
    let mut cmd = Command::cargo_bin("nancy")?;
    cmd.arg("init")
        .arg("--name").arg("Missing data directory")
        .arg("/path/to/missing/dir")
        .assert()
        .failure();

    Ok(())
}


#[test]
fn init_empty_dir() -> Result<(), Box<dyn std::error::Error>> {
    let dir = empty_dir()?;

    init_dir(dir.path())?;

    Ok(())
}

fn record_dir(dir: &Path) -> Result<assert_cmd::assert::Assert, assert_cmd::cargo::CargoError> {
    let mut cmd = Command::cargo_bin("nancy")?;
    Ok(cmd.arg("record")
        .arg("--message").arg("Test recording")
        .arg(dir)
        .assert()
        .success())
}

#[test]
fn record_empty_dir() -> Result<(), Box<dyn std::error::Error>> {
    let d = empty_dir()?;
    let path = d.path();

    init_dir(path)?;
    record_dir(path)?;

    Ok(())
}

#[test]
fn re_record_with_files() -> Result<(), Box<dyn std::error::Error>> {
    let d = empty_dir()?;
    let path = d.path();

    init_dir(path)?;
    record_dir(path)?;

    add_some_files(path)?;

    record_dir(path)?;

    Ok(())
}