//
//  OXGameController.swift
//  NoughtsAndCrosses
//
//  Created by Alejandro Castillejo on 6/2/16.
//  Copyright © 2016 Julian Hulme. All rights reserved.
//

import Foundation

class OXGameController {

     var gameList:[OXGame]?
    private var currentGame: OXGame?


    class var sharedInstance: OXGameController {
        struct Static {
            static var instance:OXGameController?
            static var token: dispatch_once_t = 0
        }

        dispatch_once(&Static.token)    {
            Static.instance = OXGameController()
        }
        return Static.instance!

    }

    func getListOfGames() -> [OXGame]? {
        let random: Int = Int(arc4random_uniform(UInt32(9)) + 5)
        self.gameList = [OXGame](count: random, repeatedValue: OXGame())
        for game in self.gameList! {
            game.gameId = getRandomID()
            game.hostUser = User(email:"hostuser@gmail.com",password: "")
        }

        return gameList
    }

    func getCurrentGame() -> OXGame? {
        print("Getting current game")
        return currentGame
    }


    //Can only be called when there is an active game
    func playMove(index: Int) -> CellType{
        print("PlayingMove on 'network'")
        let cellType: CellType = (currentGame?.playMove(index))!
        return cellType
    }

    //Simple random move, it will always try to play the first indexes
    func playRandomMove() -> (CellType, Int)? {
        print("Playing random move")
        if let count = currentGame?.board.count {
            for i in 0...count - 1 {
                if (currentGame?.board[i] == CellType.EMPTY){
                    let cellType: CellType = (currentGame?.playMove(i))!
                    print(cellType)
                    print("Succesfully at: " + String(i))
                    return (cellType, i)
                }
            }
        }
        print("Unsuccesfully")
        return nil

    }

    func createNewGame(hostUser:User)   {
        print("Creating new network game")
    }


    func acceptGameNumber(gameId: String) -> OXGame? {
        print("Accepting network game")
        for game in self.gameList!    {
            if (game.gameId == gameId)  {
                currentGame = game
                print("Succesfully")
                return game
            }

        }
        print("Not succesfully")
        return nil

    }

    func finishCurrentGame(){
        print("Finishing current game")
        currentGame = nil
    }

    //Helper functions
    func getRandomID() -> String {
        let letters : NSString = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
        let len: Int = 10
        let randomString : NSMutableString = NSMutableString(capacity: len)

        for _ in 1...len {
            let length = UInt32 (letters.length)
            let rand = arc4random_uniform(length)
            randomString.appendFormat("%C", letters.characterAtIndex(Int(rand)))
        }

        return randomString as String
    }

}