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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 var correctAnswers: [String: T] { get set }
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26 var wrongAnswers: [String: T] { get set }
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27
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28 // Alerts
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29 var alertTitle: String { get set }
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30 var alertMessage: String { get set }
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31 var showingNoLivesAlert: Bool { get set }
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32 var showingEndGameAlert: Bool { get set }
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33 var showingWrongAnswerAlert: Bool { get set }
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34 var showingExitGameAlert: Bool { get set }
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35
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36 // Animations
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37 var scoreScaleAmount: Double { get set }
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38 var livesScaleAmount: Double { get set }
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39
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40 // Modal views
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41 var showingBuyLivesView: Bool { get set }
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42 var showingGameStatsView: Bool { get set }
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43 }
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44
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45 extension Game {
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46 var questionCounter: Int {
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47 dataAsked.count
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48 }
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49
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50 func askQuestion() {
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51 guard questionCounter < data.count else {
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52 alertTitle = "Amazing!"
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53 alertMessage = "You've completed the game."
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54 showingEndGameAlert = true
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55
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56 return
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57 }
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58
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59 // Get random choices
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60 var userChoices = [String: T]()
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61
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62 while userChoices.count < 2 {
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63 if let choice = data.randomElement() {
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64 userChoices[choice.key] = choice.value
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65 } else {
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66 fatalError("Couldn't get a random value from data")
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67 }
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68 }
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69
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70 // Get question asked (correct answer)
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71 let correctAnswer = data.first(where: {
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72 !userChoices.keys.contains($0.key) && !dataAsked.contains($0.key)
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73 })
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74
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75 // Unwrap optional
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76 if let correctAnswer = correctAnswer {
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77 userChoices[correctAnswer.key] = correctAnswer.value
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78 dataAsked.append(correctAnswer.key)
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79 self.correctAnswer = correctAnswer
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80 } else {
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81 fatalError("Couldn't unwrap optional value")
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82 }
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83
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84 self.userChoices = userChoices
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85 }
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86
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87 func answer(_ choice: (key: String, value: T)) {
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88 guard userLives > 0 else {
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89 alertTitle = "Not enough lives!"
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90 alertMessage = "Please buy more lives to keep playing"
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91 showingNoLivesAlert = true
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92
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93 return
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94 }
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95
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96 if correctAnswer == choice {
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97 hapticSuccess()
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98
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99 withAnimation(.easeIn(duration: 0.5)) {
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100 scoreScaleAmount += 1
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101 userScore += 1
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102 }
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103
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104 correctAnswers[correctAnswer.key] = correctAnswer.value
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105 askQuestion()
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106 } else {
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107 hapticError()
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108
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109
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110 withAnimation(.easeIn(duration: 0.5)) {
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111 livesScaleAmount += 1
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112 userLives -= 1
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113 }
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114
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115 alertTitle = "Wrong!"
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116 alertMessage = "You have \(userLives) lives left"
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117 showingWrongAnswerAlert = true
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118
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119 wrongAnswers[choice.key] = choice.value
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120 }
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121
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122 DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { [self] in
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123 withAnimation(.easeIn(duration: 0.5)) {
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124 scoreScaleAmount = 1
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125 livesScaleAmount = 1
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126 }
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127 }
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128 }
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129 }
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