//
//  parseViewController.swift
//  parseTest
//
//  Created by Jay Liew on 6/23/17.
//  Copyright © 2017 Jay Liew. All rights reserved.
//

// .______      ___      .______          _______. _______
// |   _  \    /   \     |   _  \        /       ||   ____|
// |  |_)  |  /  ^  \    |  |_)  |      |   (----`|  |__
// |   ___/  /  /_\  \   |      /        \   \    |   __|
// |  |     /  _____  \  |  |\  \----.----)   |   |  |____
// | _|    /__/     \__\ | _| `._____|_______/    |_______|
//
// ______  __    __   _______     ___   .___________.
// /      ||  |  |  | |   ____|   /   \  |           |
// |  ,----'|  |__|  | |  |__     /  ^  \ `---|  |----`
// |  |     |   __   | |   __|   /  /_\  \    |  |
// |  `----.|  |  |  | |  |____ /  _____  \   |  |
// \______||__|  |__| |_______/__/     \__\  |__|
//
// _______. __    __   _______  _______ .___________.
// /       ||  |  |  | |   ____||   ____||           |
// |   (----`|  |__|  | |  |__   |  |__   `---|  |----`
// \   \    |   __   | |   __|  |   __|      |  |
// .----)   |   |  |  |  | |  |____ |  |____     |  |
// |_______/    |__|  |__| |_______||_______|    |__|
//

import UIKit
import Parse

class parseViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        queryRelationalData()

    } // viewDidLoad

    func queryRelationalData(){
        // retriving relational data (not pointer, but "relation")

        let query = PFQuery(className:"ThoughtRecord")
        query.findObjectsInBackground { (objects: [PFObject]?, error: Error?) in
            if let thoughtRecords = objects{
                for record in thoughtRecords{
                    print("entered thought records for loop")

                    let relation = record.relation(forKey: "supportingFacts")
                    let query = relation.query()

                    query.findObjectsInBackground(block: { (objects: [PFObject]?, error: Error?) in
                        if let sFacts = objects {
                            for sFact in sFacts{
                                print("entered sFact for loop")
                                print("\(sFact["fact"])")
                            }
                        }else{
                            print("no sfacts")
                        }
                        if let error = error {
                            print("error: \(error.localizedDescription)")
                        }else{
                            print("no error")
                        }

                    })
                }
            }else{
                print("no thought records")
            }
        } // find in bg
    } // queryRelationalData

    func saveRelationalData(){
        // saving relational data (not pointer, but "relation" data type--a Parse contruct)
        // an s-fact points to one thought record. One thought record can have many s-facts

        let sFact = PFObject(className:"SupportingFact")
        sFact["fact"] = "lol"

        let sFact2 = PFObject(className:"SupportingFact")
        sFact2["fact"] = "nyan"

        let sFact3 = PFObject(className:"SupportingFact")
        sFact3["fact"] = "cat"

        let thoughtRecord = PFObject(className:"ThoughtRecord")
        thoughtRecord["situation"] = "playa!"

        let relation = thoughtRecord.relation(forKey: "supportingFacts")
        relation.add(sFact)
        relation.add(sFact2)
        relation.add(sFact3)

        Timer.scheduledTimer(withTimeInterval: 0.0, repeats: false) { (_) in
            // sFacts must be saved FIRST
            sFact.saveInBackground { (_ Bool, e:Error?) in
            }
            sFact2.saveInBackground { (_ Bool, e:Error?) in
            }
            sFact3.saveInBackground { (_ Bool, e:Error?) in
            }
        }

        Timer.scheduledTimer(withTimeInterval: 2.0, repeats: false) { (_) in
            // time to make sure sFact objects save before saving the
            // thought record, which is the object with the PFRelation field

            thoughtRecord.saveInBackground { (success:Bool, e:Error?) in
                if success == true{
                    print("record save success")

                    // this relation object is explicitly needed (the one declared above outside this block is not the same)
                    let relation = thoughtRecord.relation(forKey: "supportingFacts")
                    let query = relation.query()
                    query.findObjectsInBackground(block: { (objects: [PFObject]?, error: Error?) in
                        if let sFacts = objects {
                            for sFact in sFacts{
                                print("sFact for loop")
                                print("\(sFact["fact"])")
                            }
                        }else{
                            print("no sfacts")
                        }
                        if let error = error {
                            print("error: \(error.localizedDescription)")
                        }else{
                            print("no error")
                        }
                    }) // find in bg
                }else{
                    print("record save fail")
                }
            }
        }
    } // saveRelationalData

    func queryForObjects(){
        // query for objects

        let query = PFQuery(className:"SupportingFact")
        //query.whereKey("playerName", equalTo:"Sean Plott")

        query.findObjectsInBackground { (objects: [PFObject]?, error: Error?) in
            if let objects = objects{
                for sFact in objects{

                    print("\(sFact["fact"]!)")
                }
            }
        }
    } // queryForObjects

    func saveAnObject(){
        // save object
        let sFact = PFObject(className:"SupportingFact")
        sFact["fact"] = "Luvin Cattania"
        sFact.saveInBackground { (success: Bool, error: Error?) in
            if(success==true){
                print("success")
            }else{
                print("fail")
            }
            if let error = error{
                print("error: \(error.localizedDescription)")
            }else{
                print("no error obj")
            }
        } // saveInBackground
    } // saveAnObject

} // class parseViewController