using System;
using System.Linq;
using System.Threading.Tasks;
using PolyTraderSharp;
using PolyTraderSharp.Services;
using Xunit;

namespace PolyTrader.Tests.WebUi
{
    /// <summary>
    /// Trading beenden über das WebUI, ohne die Anwendung zu beenden (#563).
    /// </summary>
    public class StopTradingEndpointTests
    {
        [Fact]
        public async Task Beenden_setzt_beide_Modi_auf_Inaktiv_und_die_Pause_an()
        {
            await using var web = await WebUiTestHost.StartAsync();
            web.State.LiveTradingMode = TradingMode.Active;
            web.State.DemoTradingMode = TradingMode.SellOnly;

            var (status, body) = await web.PostJsonAsync("/api/dashboard/stop-trading", new { confirmed = true });

            Assert.Equal(200, status);
            Assert.Equal(TradingMode.Inactive, web.State.LiveTradingMode);
            Assert.Equal(TradingMode.Inactive, web.State.DemoTradingMode);
            Assert.True(web.State.GlobalTradingPaused);
            Assert.True(body.GetProperty("globalTradingPaused").GetBoolean());
        }

        [Fact]
        public async Task Ohne_Bestaetigung_bleibt_alles_wie_es_ist()
        {
            await using var web = await WebUiTestHost.StartAsync();
            web.State.LiveTradingMode = TradingMode.Active;

            var (withoutBody, _) = await web.PostJsonAsync("/api/dashboard/stop-trading");
            var (notConfirmed, _) = await web.PostJsonAsync("/api/dashboard/stop-trading", new { confirmed = false });

            Assert.Equal(400, withoutBody);
            Assert.Equal(400, notConfirmed);
            Assert.Equal(TradingMode.Active, web.State.LiveTradingMode);
            Assert.False(web.State.GlobalTradingPaused);
        }

        [Fact]
        public async Task Anwendung_und_WebUI_bleiben_danach_erreichbar()
        {
            await using var web = await WebUiTestHost.StartAsync();

            await web.PostJsonAsync("/api/dashboard/stop-trading", new { confirmed = true });
            var summary = await web.GetJsonAsync("/api/dashboard/summary");

            Assert.True(summary.GetProperty("globalTradingPaused").GetBoolean());
            Assert.Equal("Inactive", summary.GetProperty("liveTradingMode").GetString());
        }

        [Fact]
        public async Task Beenden_wird_als_Warnung_protokolliert()
        {
            await using var web = await WebUiTestHost.StartAsync();

            await web.PostJsonAsync("/api/dashboard/stop-trading", new { confirmed = true });

            var entry = web.Logger.GetHistory(TimeSpan.FromMinutes(1))
                .LastOrDefault(e => e.Message.Contains("Trading beendet", StringComparison.Ordinal));
            Assert.NotNull(entry);
            Assert.Equal(LogLevel.Warning, entry!.Level);
            Assert.Contains("Orders an der Börse bleiben stehen", entry.Message);
        }

        [Fact]
        public async Task Wiederaufnahme_nur_ausdruecklich_ueber_die_Modus_Schalter()
        {
            await using var web = await WebUiTestHost.StartAsync();
            await web.PostJsonAsync("/api/dashboard/stop-trading", new { confirmed = true });

            // Die Pause aufzuheben genuegt nicht: Die Modi stehen weiter auf Inaktiv.
            await web.PostJsonAsync("/api/dashboard/trading-mode", new { modeType = "pause", targetMode = "" });
            Assert.False(web.State.GlobalTradingPaused);
            Assert.Equal(TradingMode.Inactive, web.State.LiveTradingMode);
            Assert.Equal(TradingMode.Inactive, web.State.DemoTradingMode);

            var (status, _) = await web.PostJsonAsync("/api/dashboard/trading-mode", new { modeType = "demo", targetMode = "Active" });
            Assert.Equal(200, status);
            Assert.Equal(TradingMode.Active, web.State.DemoTradingMode);
        }
    }
}