use {
	fallible_iterator :: * ,
	rusqlite :: { Connection , Error , Error :: * , ffi :: ErrorCode :: * } ,
	std :: path :: * ,
} ;

use crate :: { collection :: * , error :: { * , ZoodexError :: * } } ;



pub fn read_collection_file () -> Result <Collection> {
	let sqlite_connection = Connection :: open ("zoodex.sqlite") ? ;

	let mut films_query = sqlite_connection
		. prepare ("select * from films order by release_date desc") ? ;
	let films = films_query . query (()) ? . map ( |row| {
		let uuid = row . get (0) ? ;
		let name = row . get (1) ? ;
		let original_name = row . get (2) ? ;
		let release_date = row . get (3) ? ;
		let runtime_minutes = row . get (4) ? ;
		let poster_file_path = row . get :: < _ , Option <String> > (5) ?
			. map ( PathBuf :: from ) ;
		let video_file_path = row . get :: < _ , Option <String> > (6) ?
			. map ( PathBuf :: from ) ;

		Ok ( Film {
			uuid ,
			name ,
			original_name ,
			release_date ,
			runtime_minutes ,
			poster_file_path ,
			video_file_path ,
		} )
	} ) ;

	let mut series_query = sqlite_connection . prepare ("select * from series") ? ;
	let series = series_query . query (()) ? . map ( |row| {
		let uuid = row . get (0) ? ;
		let name = row . get (1) ? ;
		let original_name = row . get (2) ? ;
		let poster_file_path = row . get :: < _ , Option <String> > (3) ?
			. map ( PathBuf :: from ) ;

		Ok ( Series { uuid , name , original_name , poster_file_path } )
	} ) ;

	Ok ( Collection {
		films : films . collect () ? ,
		series : series . collect () ? ,
	} )
}

impl From <Error> for ZoodexError {
	fn from ( error : Error ) -> Self {
		match error {
			SqliteFailure ( error , _ ) => {
				match error . code {
					Unknown => CollectionFileError ,
					_ => panic ! () ,
				}
			} ,
			_ => panic ! () ,
		}
	}
}