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1 //
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2 // GameProtocol.swift
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3 // GeoQuiz
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4 //
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5 // Created by Dennis Concepción Martín on 18/9/22.
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6 //
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7
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8 import Foundation
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9 import SwiftUI
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10
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11 protocol Game: ObservableObject {
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12
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13 // Define generic type
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14 associatedtype T: Equatable
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15
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16 // Game
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17 var data: [String: T] { get set}
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18 var dataAsked: [String] { get set }
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19 var correctAnswer: (key: String, value: T) { get set }
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20
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21 // User
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22 var userChoices: [String: T] { get set }
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23 var userScore: Int { get set }
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24 var userLives: Int { get set }
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25
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26 // Alerts
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27 var alertTitle: String { get set }
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28 var alertMessage: String { get set }
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29 var showingNoLivesAlert: Bool { get set }
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30 var showingEndGameAlert: Bool { get set }
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31 var showingWrongAnswerAlert: Bool { get set }
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32
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33 // Animations
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34 var scoreScaleAmount: Double { get set }
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35 var livesScaleAmount: Double { get set }
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36
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37 // Modal views
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38 var showingBuyLivesView: Bool { get set }
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39 }
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40
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41 extension Game {
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42 var questionCounter: Int {
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43 dataAsked.count
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44 }
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45
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46 func askQuestion() {
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47 guard questionCounter < data.count else {
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48 alertTitle = "Amazing!"
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49 alertMessage = "You've completed the game."
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50 showingEndGameAlert = true
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51
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52 return
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53 }
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54
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55 // Get random choices
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56 var userChoices = [String: T]()
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57
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58 while userChoices.count < 2 {
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59 if let choice = data.randomElement() {
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60 userChoices[choice.key] = choice.value
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61 } else {
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62 fatalError("Couldn't get a random value from data")
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63 }
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64 }
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65
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66 // Get question asked (correct answer)
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67 let correctAnswer = data.first(where: {
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68 !userChoices.keys.contains($0.key) && !dataAsked.contains($0.key)
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69 })
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70
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71 // Unwrap optional
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72 if let correctAnswer = correctAnswer {
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73 userChoices[correctAnswer.key] = correctAnswer.value
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74 dataAsked.append(correctAnswer.key)
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75 self.correctAnswer = correctAnswer
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76 } else {
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77 fatalError("Couldn't unwrap optional value")
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78 }
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79
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80 self.userChoices = userChoices
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81 }
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82
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83 func answer(_ choice: (key: String, value: T)) {
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84 guard userLives > 0 else {
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85 alertTitle = "Not enough lives!"
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86 alertMessage = "Please buy more lives to keep playing"
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87 showingNoLivesAlert = true
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88
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89 return
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90 }
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91
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92 if correctAnswer == choice {
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93 hapticSuccess()
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94 userScore += 1
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95
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96 withAnimation(.easeIn(duration: 0.5)) {
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97 scoreScaleAmount += 1
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98 }
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99
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100 askQuestion()
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101 } else {
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102 hapticError()
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103 userLives -= 1
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104
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105 withAnimation(.easeIn(duration: 0.5)) {
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106 livesScaleAmount += 1
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107 }
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108
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109 alertTitle = "Wrong!"
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110 alertMessage = "You have \(userLives) lives left"
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111 showingWrongAnswerAlert = true
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112 }
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113
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114 DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { [self] in
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115 withAnimation(.easeIn(duration: 0.5)) {
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116 scoreScaleAmount = 1
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117 livesScaleAmount = 1
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118 }
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119 }
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120 }
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121 }
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