using System.Collections.Generic;
using System;
using System.Linq;

namespace Cryville.Crtr.Browsing.UI {
	internal static class MetaPropertyExtensions {
		public static IEnumerable<KeyValuePair<string, object>> EnumerateProperty(this MetaProperty prop, bool shortDistinct = false) {
			if (prop.Values.ContainsKey("distinct-primary") && shortDistinct) {
				yield return new KeyValuePair<string, object>(prop.Name, prop.Values["distinct-primary"]);
				if (prop.Values.ContainsKey("distinct-secondary")) {
					yield return new KeyValuePair<string, object>(prop.Name, prop.Values["distinct-secondary"]);
					if (prop.Values.ContainsKey("distinct-tertiary")) {
						yield return new KeyValuePair<string, object>(prop.Name, prop.Values["distinct-tertiary"]);
					}
				}
			}
			else yield return new KeyValuePair<string, object>(prop.Name, prop.MainValue);
		}
		public static IEnumerable<KeyValuePair<string, object>> EnumerateProperties(this IResourceMeta meta, bool shortDistinct = false) {
			foreach (var prop in meta.Properties) {
				foreach (var item in EnumerateProperty(prop, shortDistinct)) yield return item;
			}
		}
		public static IEnumerable<KeyValuePair<string, object>> EnumerateBasicProperties(this IResourceMeta meta, bool shortDistinct = false) {
			foreach (var prop in EnumerateProperties(meta, shortDistinct)) {
				if (prop.Value is string || prop.Value is IFormattable) {
					yield return new KeyValuePair<string, object>(prop.Key, prop.Value);
				}
			}
		}
		public static IEnumerable<KeyValuePair<string, T>> EnumerateProperties<T>(this IResourceMeta meta, bool shortDistinct = false) {
			return EnumerateProperties(meta, shortDistinct)
				.Where(prop => prop.Value is T)
				.Select(prop => new KeyValuePair<string, T>(prop.Key, (T)prop.Value));
		}
	}
}