from typing import List, Optional

from office365.runtime.queries.service_operation import ServiceOperationQuery
from office365.sharepoint.entity import Entity


class ViewFieldCollection(Entity):
    """Represents a collection of Field resources."""

    def __init__(self, context, resource_path=None):
        super(ViewFieldCollection, self).__init__(context, resource_path)

    def __len__(self):
        return len(self.items)

    def __getitem__(self, index):
        # type: (int) -> str
        """Gets view field by index"""
        return self.items[index]

    def __repr__(self):
        return repr(self.items)

    @property
    def schema_xml(self):
        # type: () -> Optional[str]
        """Gets Schema Xml."""
        return self.properties.get("SchemaXml", None)

    @property
    def items(self):
        # type: () -> Optional[List[str]]
        """Gets items."""
        return self.properties.get("Items", None)

    def set_property(self, name, value, persist_changes=False):
        if name == "Items":
            value = list(value.values())
        super(ViewFieldCollection, self).set_property(name, value, persist_changes)
        return self

    def add_view_field(self, field_name):
        """
        Adds the field with the specified field internal name or display name to the collection.
        :param str field_name:
        """
        qry = ServiceOperationQuery(self, "AddViewField", [field_name])
        self.context.add_query(qry)
        return self

    def move_view_field_to(self, name, index):
        """
        Moves the field with the specified field internal name to the specified position in the collection
        :param str name: Specifies the field internal name.
        :param int index: Specifies the new position for the field (2). The first position is 0.
        """
        params = {"field": name, "index": index}
        qry = ServiceOperationQuery(self, "MoveViewFieldTo", None, params)
        self.context.add_query(qry)
        return self

    def remove_all_view_fields(self):
        """Removes all the fields from the collection."""
        qry = ServiceOperationQuery(self, "RemoveAllViewFields")
        self.context.add_query(qry)
        return self

    def remove_view_field(self, field_name):
        """
        Removes the field with the specified field internal name or display name from the collection.
        :param str field_name:
        """
        qry = ServiceOperationQuery(self, "RemoveViewField", [field_name])
        self.context.add_query(qry)
        return self

    @property
    def entity_type_name(self):
        return "SP.ViewFieldCollection"