use std::path::PathBuf;

use serde::Deserialize;

use crate::utils::format_detection::FileFormat;

#[derive(Debug, Clone)]
pub struct Tags {
	pub title: String,
	pub artist: String,
	pub track_number: Option<u64>,
}

impl Default for Tags {
	fn default() -> Self {
		Tags {
			title: "".to_string(),
			artist: "".to_string(),
			track_number: None,
		}
	}
}

#[derive(Default, Debug, Clone)]
pub struct AudioFileInfo {
	pub tags: Tags,
	#[cfg(feature = "replaygain")]
	pub contains_replaygain: bool,
	#[cfg(feature = "replaygain")]
	pub supports_replaygain: bool,
	pub format: Option<FileFormat>,
}

#[derive(Debug, Clone)]
pub struct File {
	pub filename: String,
	pub extension: String,

	// relative path to file's folder
	pub path_to: PathBuf,
	// path to folder from source
	pub path_from_source: PathBuf,

	pub extra_files: Vec<File>,

	pub info: AudioFileInfo,

	pub folder_meta: FolderMeta,
}

impl File {
	pub fn from_path(source_dir: String, full_path: PathBuf) -> File {
		let full_file_path = PathBuf::from(&source_dir).join(full_path);

		let filename_without_extension = full_file_path
			.file_stem()
			.expect("filename invalid")
			.to_string_lossy()
			.to_string();

		let extension = full_file_path.extension();

		let extension = if let Some(extension) = extension {
			extension.to_string_lossy().to_string()
		} else {
			"".to_string()
		};

		let path_from_src = full_file_path
			.strip_prefix(&source_dir)
			.expect("couldn't get path relative to source");

		let mut folder_path_from_src = path_from_src.to_path_buf();
		folder_path_from_src.pop();

		let path_to = PathBuf::from(&source_dir).join(&folder_path_from_src);

		File {
			filename: filename_without_extension,
			extension,
			path_from_source: folder_path_from_src,
			path_to,
			extra_files: Vec::new(),
			info: AudioFileInfo::default(),
			folder_meta: FolderMeta::default(),
		}
	}

	pub fn join_filename(&self) -> String {
		format!("{}.{}", self.filename, self.extension)
	}
	pub fn join_path_to(&self) -> PathBuf {
		PathBuf::from(&self.path_to).join(self.join_filename())
	}
	pub fn join_path_from_source(&self) -> PathBuf {
		PathBuf::from(&self.path_from_source).join(self.join_filename())
	}
}

#[derive(Debug, Clone, Deserialize, Default)]
pub struct FolderMeta {
	pub is_album: bool,
}

impl FolderMeta {
	pub fn load(path: &PathBuf) -> Result<FolderMeta, Box<dyn std::error::Error>> {
		let file = std::fs::File::open(path)?;
		let reader = std::io::BufReader::new(file);

		let u: FolderMeta =
			serde_yaml::from_reader(reader).expect("error while reading folder meta");
		Ok(u)
	}
}