// this uses a dynamic coding key (StockKey) but does not work with nested objects (ideally quote should have many properties inside

import SwiftUI
import Combine
import Foundation

/* todo modify to work with json in format:
 {
   "AAPL":{"quote":{},"chart":[]},
   "MSFT":{"quote":{},"chart":[]}
 }
*/


let json = """
{
"AAPL" : {
  "quote" : "asdf asdf asdf",
  "latestPrice" : 267.99
},
"MSFT" : {
  "quote" : "asdfasdfas",
  "latestPrice" : 165.14
}
}
"""
  struct StocksModel : Codable {
    struct StockKey : CodingKey {
        var stringValue: String
        init?(stringValue: String) {
            self.stringValue = stringValue
        }
        var intValue: Int? { return nil }
        init?(intValue: Int) { return nil }
        
        static let latestPrice = StockKey(stringValue: "latestPrice")!
    }
    
    let quote : [StockModel]
    
    struct StockModel : Codable {
        let symbol: String
        let latestPrice: Double
    }
    
    
    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: StockKey.self)
        
        var quote: [StockModel] = []
        for key in container.allKeys {
            let nested = try container.nestedContainer(keyedBy: StockKey.self, forKey: key)
            let latestPrice = try nested.decode(Double.self, forKey: .latestPrice)
            quote.append(StockModel(symbol: key.stringValue, latestPrice: latestPrice))
        }
        
        self.quote = quote
    }
    
    func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: StockKey.self)
        for item in quote {
            let key = StockKey(stringValue: item.symbol)!
            var nested = container.nestedContainer(keyedBy: StockKey.self, forKey: key)
            try nested.encode(item.latestPrice, forKey: .latestPrice)
        }
    }
  }

  
let decoder = JSONDecoder()
if let jsonData = json.data(using: .utf8) {
  do {
      let results = try decoder.decode(StocksModel.self, from: jsonData)
      print(results)
  } catch {
      print(error)
  }
}