use { fallible_iterator :: * , rusqlite :: { Connection , Error :: * } } ;

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 : Option <String> = row . get (5) ? ;
		let video_file_path : Option <String> = row . get (6) ? ;

		Ok ( Film {
			uuid ,
			name ,
			original_name ,
			release_date ,
			runtime_minutes ,
			poster_file_path : poster_file_path . map ( String :: into ) ,
			video_file_path : video_file_path . map ( String :: into ) ,
		} )
	} ) ;

	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 : Option <String> = row . get (3) ? ;

		Ok ( Series {
			uuid ,
			name ,
			original_name ,
			poster_file_path : poster_file_path . map ( String :: into ) ,
		} )
	} ) ;

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

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