using System;

namespace Jovian.EncounterSystem {
    /// <summary>
    /// Marker interface for the polymorphic payload of a <see cref="Reward"/>.
    /// Each concrete kind carries its own designer-facing data. Behaviour lives in a reward-applying
    /// handler registered on <see cref="EncounterResolver"/> for <see cref="GiveRewardEvent"/> —
    /// kinds are pure data. Add a new reward type by creating a new <see cref="IRewardKind"/>
    /// implementation; the SubclassSelector drawer will surface it automatically.
    /// </summary>
    public interface IRewardKind {
    }

    /// <summary>Grants an amount of a named currency (gold, silver, faction-specific scrip, ...).</summary>
    [Serializable]
    public class CurrencyRewardKind : IRewardKind {
        public string currencyId;
        public int amount;
    }

    /// <summary>Grants one or more copies of an item identified by id.</summary>
    [Serializable]
    public class ItemRewardKind : IRewardKind {
        public string itemId;
        public int quantity;
    }

    /// <summary>Grants experience points to the party or a specific recipient.</summary>
    [Serializable]
    public class ExperienceRewardKind : IRewardKind {
        public int amount;
    }

    /// <summary>Unlocks something identified by id (recipe, area, journal entry, achievement, ...).
    /// What is actually unlocked is decided by the game-side handler.</summary>
    [Serializable]
    public class UnlockableRewardKind : IRewardKind {
        public string unlockableId;
    }

    /// <summary>Catch-all with no kind-specific data — useful for prototyping or one-off rewards
    /// whose semantics are carried by the <see cref="Reward.id"/> alone.</summary>
    [Serializable]
    public class OtherRewardKind : IRewardKind {
    }
}