using InvercargillSql.Orm;
using Inversion;

namespace InvercargillSqlInversion {

    public class InversionTypeProvider : Object, TypeProvider {

        private Scope scope = inject<Scope>();

        public InvercargillSql.Orm.EntityMapper? get_mapper_for_type (GLib.Type type) throws Error {
            print(@"get_mapper_for_type $(type.name())\n");
            var reg = scope.get_registrations(typeof(EntityMapper))
                .where(r => r.get_metadata<MapperTypeInfo>().any(i => i.mapper_type == type))
                .first_or_default();

            if(reg == null) {
                return null;
            }
            return (EntityMapper)scope.resolve_registration(reg);
        }

        public InvercargillSql.Orm.Projections.ProjectionDefinition? get_projection_for_type (GLib.Type type) throws Error {
            print(@"get_projection_for_type $(type.name())\n");
            var reg = scope.get_registrations(typeof(Projections.ProjectionDefinition))
                .where(r => r.get_metadata<MapperTypeInfo>().any(i => i.mapper_type == type))
                .first_or_default();

            if(reg == null) {
                return null;
            }
            return (Projections.ProjectionDefinition)scope.resolve_registration(reg);
        }
        public bool has_mapper_for_type (GLib.Type type) {
            print(@"has_mapper_for_type $(type.name())\n");
            return scope.get_registrations(typeof(EntityMapper))
                .any(r => r.get_metadata<MapperTypeInfo>().any(i => i.mapper_type == type));
        }
        public bool has_projection_for_type (GLib.Type type) {
            print(@"has_projection_for_type $(type.name())\n");
            return scope.get_registrations(typeof(Projections.ProjectionDefinition))
                .any(r => r.get_metadata<MapperTypeInfo>().any(i => i.mapper_type == type));
        }
    }

    public class MapperTypeInfo : Object {
        public Type mapper_type { get; set; }

        public MapperTypeInfo(Type type) {
            mapper_type = type;
        }
    }

}