import { Field, FIELD_ID } from "./fields/Field"
import { Key, KeyStore } from "./fields/Key"
import { ObservableMap, action } from "mobx";
import { Document } from "./fields/Document"

export class SocketStub {

    static FieldStore: ObservableMap<FIELD_ID, Field> = new ObservableMap();
    public static SEND_ADD_DOCUMENT(document: Document) {

        // Send a serialized version of the document to the server
        // ...SOCKET(ADD_DOCUMENT, serialied document)

        // server stores each document field in its repository of stored fields
        document.fields.forEach((f, key) => this.FieldStore.set((f as Field).Id, f as Field));

        // server stores stripped down document (w/ only field id proxies) in the field store
        this.FieldStore.set(document.Id, new Document(document.Id));
        document.fields.forEach((f, key) => (this.FieldStore.get(document.Id) as Document)._proxies.set(key, (f as Field).Id));
    }

    public static SEND_FIELD_REQUEST(fieldid: FIELD_ID, callback: (field: Field) => void, timeout: number) {

        if (timeout < 0)// this is a hack to make things easier to setup until we have a server... won't be neededa fter that.
            callback(this.FieldStore.get(fieldid) as Field);
        else { // actual logic here... 

            // Send a request for fieldid to the server
            // ...SOCKET(RETRIEVE_FIELD, fieldid)

            // server responds (simulated with a timeout) and the callback is invoked
            setTimeout(() =>

                // when the field data comes back, call the callback() function 
                callback(this.FieldStore.get(fieldid) as Field),


                timeout);
        }
    }

    public static SEND_ADD_DOCUMENT_FIELD(doc: Document, key: Key, value: Field) {

        // Send a serialized version of the field to the server along with the
        // associated info of the document id and key where it is used.

        // ...SOCKET(ADD_DOCUMENT_FIELD, document id, key id, serialized field)

        // server updates its document to hold a proxy mapping from key => fieldId
        var document = this.FieldStore.get(doc.Id) as Document;
        if (document)
            document._proxies.set(key, value.Id);

        // server adds the field to its repository of fields
        this.FieldStore.set(value.Id, value);
    }

    public static SEND_DELETE_DOCUMENT_FIELD(doc: Document, key: Key) {
        // Send a request to delete the field stored under the specified key from the document

        // ...SOCKET(DELETE_DOCUMENT_FIELD, document id, key id)

        // Server removes the field id from the document's list of field proxies
        var document = this.FieldStore.get(doc.Id) as Document;
        if (document)
            document._proxies.delete(key);
    }

    public static SEND_SET_FIELD(field: Field, value: any) {
        // Send a request to set the value of a field

        // ...SOCKET(SET_FIELD, field id, serialized field value)

        // Server updates the value of the field in its fieldstore
        if (this.FieldStore.get(field.Id))
            this.FieldStore.get(field.Id)!.TrySetValue(value);
    }
}