use std::fs;
use std::path::Path;

pub struct Repository {
	pub base_dir: String,
	pub ingest_dir: String,
	pub archive_dir: String,
	pub output_dir: String,
}

impl Repository {
	pub fn new(base_path: &str) -> Repository {
		// create the base directory path
		create_directory(base_path);

		// create the needed sub-directories
		let ingest_path = Path::new(base_path).join("ingest");
		create_directory(ingest_path.to_str().unwrap());
		let archive_path = Path::new(base_path).join("archive");
		create_directory(archive_path.to_str().unwrap());
		let output_path = Path::new(base_path).join("output");
		create_directory(output_path.to_str().unwrap());

		return Repository {
			base_dir: String::from(base_path),
			ingest_dir: String::from(ingest_path.to_str().unwrap()),
			archive_dir: String::from(archive_path.to_str().unwrap()),
			output_dir: String::from(output_path.to_str().unwrap()),
		};
	}

	pub fn search_ingest(&self) -> Vec<String> {
		// read file entries from ingest
		let files = fs::read_dir(&self.ingest_dir).unwrap();

		// create vec object and loop through entries to find what we want
		let mut ingest_files: Vec<String> = vec![];
		for f in files {
			let f = f.unwrap();
			let path = f.path();
			if path.is_file() {
				let file_path = path.file_name().unwrap().to_str();
				ingest_files.push(String::from(file_path.unwrap()));
			}
		}

		return ingest_files;
	}

	pub fn archive_file(&self, file: &str) {
		let ingest_file = Path::new(&self.ingest_dir).join(file);
		let archive_file = Path::new(&self.archive_dir).join(file);

		match fs::copy(&ingest_file, &archive_file) {
			Ok(_) => {
				println!("Archiving video file {}.", ingest_file.to_str().unwrap());
			},
			Err(e) => {
				eprintln!("Error archiving file {}: {}", ingest_file.to_str().unwrap(), e);
				std::process::exit(1);
			}
		}
	}

	pub fn cleanup_file(&self, file: &str) {
		let ingest_file = Path::new(&self.ingest_dir).join(file);
		fs::remove_file(&ingest_file)
			.expect("File deletion failed.");
	}
}

fn create_directory(path: &str) {
	let d = Path::new(path);
	if d.is_dir() {
		println!("Directory {} already exists.", path);
	} else {
		match fs::create_dir(path) {
			Ok(_) => {
				println!("Creating directory {}.", path);
			},
			Err(e) => {
				eprintln!("Error creating {}: {}", path, e);
				std::process::exit(1);
			}
		}
	}
}