using Microsoft.VisualStudio.TestTools.UnitTesting;
using YLErp.Modules.SwapModule.Margin;

namespace UnitTestProject.Modules.SwapModule.Margin
{
    /// <summary>
    /// 保证金利息计提（MarginLeg）单测。验证计息余额计算，以及三种形态解析器可互换产余额。
    /// 替换原 InterestLegStrategyTest 里的预付金（PrepayLeg）用例——预付金已迁出利息腿限界上下文。
    /// </summary>
    [TestClass]
    public class MarginLegTest
    {
        private const decimal Balance = 2_000_000m;

        [TestMethod]
        public void 计息余额_默认不缩放_等于保证金全额()
        {
            var leg = new MarginLeg();
            var r = leg.CalcBalance(Balance);
            Assert.AreEqual(Balance, r.Balance, "默认不缩放，余额=保证金全额");
        }

        [TestMethod]
        public void 计息余额_部分释放_按适用比例缩放()
        {
            var leg = new MarginLeg();
            var r = leg.CalcBalance(Balance, 0.5m);
            Assert.AreEqual(1_000_000m, r.Balance, "部分释放：余额×适用比例");
        }

        [TestMethod]
        public void 计息余额_零适用比例_为零()
        {
            var leg = new MarginLeg();
            var r = leg.CalcBalance(Balance, 0m);
            Assert.AreEqual(0m, r.Balance);
        }

        [TestMethod]
        public void 三种形态解析器_均可互换产出余额()
        {
            IMarginResolver cash = new CashMargin();
            IMarginResolver credit = new CreditMargin();
            IMarginResolver guarantee = new GuaranteeMargin();

            Assert.AreEqual(MarginForm.Cash, cash.Form);
            Assert.AreEqual(MarginForm.Credit, credit.Form);
            Assert.AreEqual(MarginForm.Guarantee, guarantee.Form);

            Assert.AreEqual(1_000_000m, cash.Resolve(Balance, 0.5m).Balance);
            Assert.AreEqual(1_000_000m, credit.Resolve(Balance, 0.5m).Balance);
            Assert.AreEqual(1_000_000m, guarantee.Resolve(Balance, 0.5m).Balance);
        }
    }
}