//
//  QuizQuestion.swift
//  QuizApp
//
//  Created by Paul on 03.08.25.
//

import Foundation

struct QuizQuestion: Decodable, Hashable, Identifiable {
    let id: UUID
    let question: String
    let answers: [String]
    let correctAnswer: Int
    
    let type: String?
    let minValue: Double?
    let maxValue: Double?
    let correctValue: Double?
    let unit: String?
    
    // Manuelles Decoding, id wird generiert
    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        
        question = try container.decode(String.self, forKey: .question)
        
        // Falls im JSON nicht vorhanden, Standard setzen
        answers = (try? container.decode([String].self, forKey: .answers)) ?? []
        correctAnswer = (try? container.decode(Int.self, forKey: .correctAnswer)) ?? 0
        
        // Optional
        type = try container.decodeIfPresent(String.self, forKey: .type)
        minValue = try container.decodeIfPresent(Double.self, forKey: .minValue)
        maxValue = try container.decodeIfPresent(Double.self, forKey: .maxValue)
        correctValue = try container.decodeIfPresent(Double.self, forKey: .correctValue)
        unit = try container.decodeIfPresent(String.self, forKey: .unit)
        
        id = UUID()
    }
    
    private enum CodingKeys: String, CodingKey {
        case question, answers, correctAnswer
        case type, minValue, maxValue, correctValue, unit
    }
    
    var isEstimation: Bool {
        if let t = type?.lowercased() { return t == "estimation" }
        return !answers.isEmpty ? false : (minValue != nil || maxValue != nil || correctValue != nil)
    }
}