using System;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using PolyTrader.Core.Persistence.Ef;
using PolyTrader.Modules.CopyTrading.Persistence.Ef;
using PolyTrader.Tests.TestSupport;
using PolyTraderSharp.Models;
using Xunit;

namespace PolyTrader.Tests
{
    /// <summary>
    /// Sichert die projektweiten Mapping-Invarianten ab: Core-Tabellen mit Präfix core_,
    /// Modul-Tabellen mit mod_&lt;modul&gt;_, korrekte Schlüssel, UI-Klasse nicht gemappt.
    /// </summary>
    public class DbContextMappingTests
    {
        private static CoreDbContext CoreCtx() =>
            new InMemoryContextFactory<CoreDbContext>(o => new CoreDbContext(o)).CreateDbContext();

        private static CopyTradingDbContext CtCtx() =>
            new InMemoryContextFactory<CopyTradingDbContext>(o => new CopyTradingDbContext(o)).CreateDbContext();

        [Theory]
        [InlineData(typeof(AccountState), "core_accounts")]
        [InlineData(typeof(Position), "core_positions")]
        [InlineData(typeof(MarketData), "core_markets")]
        [InlineData(typeof(TradeRecord), "core_trade_log")]
        public void Core_entities_map_to_core_prefixed_tables(Type clrType, string expectedTable)
        {
            using var ctx = CoreCtx();
            var entity = ctx.Model.FindEntityType(clrType);
            Assert.NotNull(entity);
            Assert.Equal(expectedTable, entity!.GetTableName());
        }

        [Theory]
        [InlineData(typeof(ClosedTrade), "mod_copytrading_closed_trades")]
        [InlineData(typeof(TrackedTrader), "mod_copytrading_traders")]
        [InlineData(typeof(CopyTradingAccountSettings), "mod_copytrading_account_settings")]
        [InlineData(typeof(MasterTraderHistoryRecord), "mod_copytrading_mt_history")]
        public void Module_entities_map_to_mod_copytrading_prefixed_tables(Type clrType, string expectedTable)
        {
            using var ctx = CtCtx();
            var entity = ctx.Model.FindEntityType(clrType);
            Assert.NotNull(entity);
            Assert.Equal(expectedTable, entity!.GetTableName());
        }

        [Fact]
        public void Position_has_composite_key_account_isdemo_token()
        {
            using var ctx = CoreCtx();
            var key = ctx.Model.FindEntityType(typeof(Position))!.FindPrimaryKey();
            Assert.NotNull(key);
            Assert.Equal(
                new[] { nameof(Position.AccountId), nameof(Position.IsDemo), nameof(Position.TokenId) },
                key!.Properties.Select(p => p.Name).ToArray());
        }

        [Fact]
        public void TrackedTrader_key_is_id()
        {
            using var ctx = CtCtx();
            var key = ctx.Model.FindEntityType(typeof(TrackedTrader))!.FindPrimaryKey();
            Assert.Equal(nameof(TrackedTrader.Id), Assert.Single(key!.Properties).Name);
        }

        [Fact]
        public void ClosedTradeRow_ui_class_is_not_mapped()
        {
            using var ctx = CtCtx();
            Assert.Null(ctx.Model.FindEntityType(typeof(ClosedTradeRow)));
        }

        [Fact]
        public void AccountState_open_positions_is_ignored()
        {
            using var ctx = CoreCtx();
            var entity = ctx.Model.FindEntityType(typeof(AccountState))!;
            Assert.Null(entity.FindProperty(nameof(AccountState.OpenPositions)));
            Assert.Null(entity.FindNavigation(nameof(AccountState.OpenPositions)));
        }
    }
}
