using System;
using System.Text;

namespace DanieleMarotta.RiversongCodeShowcase
{
    public class TextFormatHelper
    {
        public string Pluralize(int value, string singular, string plural)
        {
            return value == 1 ? singular : plural;
        }

        public string FormatImportantText(string text)
        {
            return $"<b>{text}</b>";
        }

        public void FormatImportantText(StringBuilder sb, string text)
        {
            sb.Append("<b>");
            sb.Append(text);
            sb.Append("</b>");
        }

        public void FormatUnlockConditions(UnlockDefinition unlock, StringBuilder sb)
        {
            if (unlock.Type != UnlockType.UnlockBuilding || unlock.Conditions.Count <= 0) return;

            sb.Append("To unlock the ");
            FormatImportantText(sb, unlock.Building.BuildingName);
            sb.AppendLine(", your village needs a little more:");

            foreach (var condition in unlock.Conditions)
            {
                sb.AppendLine();
                FormatUnlockCondition(sb, condition);
            }
        }

        private void FormatUnlockCondition(StringBuilder sb, UnlockCondition condition)
        {
            sb.Append("\u2022 ");

            switch (condition.Type)
            {
                case UnlockConditionType.BuildingPlaced:
                    sb.Append("Add a ");
                    FormatImportantText(sb, condition.Building.BuildingName);
                    sb.Append(" to your village");
                    return;

                case UnlockConditionType.HouseCountAtTierOrAbove:
                    sb.Append("Grow ");
                    sb.Append(condition.HouseCount);
                    sb.Append(' ');
                    sb.Append(Pluralize(condition.HouseCount, "house", "houses"));
                    sb.Append(" to tier ");
                    sb.Append(condition.MinHouseTierIndex + 1);
                    return;

                default:
                    throw new ArgumentOutOfRangeException();
            }
        }
    }
}