import gleam/dynamic/decode.{type Decoder}
import gleam/option.{type Option}
import models/market_symbol.{type MarketSymbol}
import models/market_trade_good.{type MarketTradeGood}
import models/market_transaction.{type MarketTransaction}
import models/trade_good.{type TradeGood}

pub type Market {
  Market(
    symbol: MarketSymbol,
    exports: List(TradeGood),
    imports: List(TradeGood),
    exchange: List(TradeGood),
    transactions: Option(List(MarketTransaction)),
    trade_goods: Option(List(MarketTradeGood)),
  )
}

pub fn decoder() -> Decoder(Market) {
  use symbol <- decode.field("symbol", market_symbol.decoder())
  use exports <- decode.field("exports", decode.list(trade_good.decoder()))
  use imports <- decode.field("imports", decode.list(trade_good.decoder()))
  use exchange <- decode.field("exchange", decode.list(trade_good.decoder()))
  use transactions <- decode.optional_field(
    "transactions",
    option.None,
    decode.optional(decode.list(market_transaction.decoder())),
  )
  use trade_goods <- decode.optional_field(
    "tradeGoods",
    option.None,
    decode.optional(decode.list(market_trade_good.decoder())),
  )
  decode.success(Market(
    symbol:,
    exports:,
    imports:,
    exchange:,
    transactions:,
    trade_goods:,
  ))
}