/**
 * Could eventually be added to TSD, or to jsforce package root...
 */

declare module "jsforce" {
  type Partial<T> = {
    [P in keyof T]?: T[P];
  };

  class Connection {
    constructor({ loginUrl: string});

    login(username: string, password: string, callback: (err: Error, userInfo: UserInfo) => void);

    query(soql: string, callback: (err: Error, ret: QueryResponse) => void);

    sobject(type: 'Account'): SObjectCollection<Account>;
    sobject(type: 'Opportunity'): SObjectCollection<Opportunity>;
    sobject(type: 'Contact'): SObjectCollection<Contact>;
  }

  interface UserInfo {
    id: string;
    organizationId: string;
    url: string;
  }

  interface SObjectCollection<T> {
    retrieve(id: string, callback: (err: Error, ret: T & RetrieveResponseExtra) => void);
    retrieve(id: string[], callback: (err: Error, ret: (T & RetrieveResponseExtra)[]) => void);

    insert(record: Partial<T>, callback: (err: Error, ret: InsertResponse) => void);
    update(record: Partial<T>, callback: (err: Error, ret: UpdateResponse) => void);
    upsert(record: Partial<T>, extIdField: string, callback: (err: Error, ret: UpsertResponse) => void);
  }

  interface QueryResponse {
    records: SObject[];
  }

  interface SObject {
    Id: string;
  }

  interface Account extends SObject {
    Name: string;
    Phone: string;
    // ...
  }

  interface Opportunity extends SObject {
    Name: string;
    StageName: string;
    CloseDate: string;
    // ...
  }

  interface Contact extends SObject {
    FirstName: string;
    MiddleName: string;
    LastName: string;
    Email: string;
    // ...
  }

  interface RetrieveResponseExtra {
    attributes: Attributes;
  }

  interface Attributes {
    type: string;
    url: string;
  }

  interface InsertResponse {
    id: string;
  }

  interface UpdateResponse {

  }

  interface UpsertResponse {
    /**
     * Id only returned if a new record is created
     */
    id?: string;
  }

  export {
    Partial,
    Connection,
    Account,
    Opportunity,
    Contact
  }
}