using NeonSprawl.Server.Game.Factions;
using NeonSprawl.Server.Game.PositionState;
using NeonSprawl.Server.Game.Quests;

namespace NeonSprawl.Server.Tests.Game.Factions;

public sealed class FactionGateOperationsTests
{
    private const string PlayerId = "dev-local-1";
    private const string GridFactionId = PrototypeE7M3QuestFactionRules.GridContractGateFactionId;
    private const string RustCollectiveFactionId = "prototype_faction_rust_collective";
    private const int GridMinStanding = PrototypeE7M3QuestFactionRules.GridContractMinStanding;

    [Fact]
    public void TryEvaluate_ShouldPass_WhenRulesEmpty()
    {
        // Arrange
        var standingStore = CreateStandingStore();
        // Act
        var outcome = FactionGateOperations.TryEvaluate(PlayerId, [], standingStore);
        // Assert
        Assert.True(outcome.Success);
        Assert.Null(outcome.ReasonCode);
        Assert.Null(outcome.FailingFactionId);
    }

    [Fact]
    public void TryEvaluate_ShouldPass_WhenStandingAtMin()
    {
        // Arrange
        var standingStore = CreateStandingStore();
        Assert.True(standingStore.TryApplyStandingDelta(PlayerId, GridFactionId, GridMinStanding).Success);
        var rules = new[] { new FactionGateRuleRow(GridFactionId, GridMinStanding) };
        // Act
        var outcome = FactionGateOperations.TryEvaluate(PlayerId, rules, standingStore);
        // Assert
        Assert.True(outcome.Success);
        Assert.Null(outcome.ReasonCode);
    }

    [Fact]
    public void TryEvaluate_ShouldDeny_WhenStandingBelowMin()
    {
        // Arrange
        var standingStore = CreateStandingStore();
        Assert.True(standingStore.TryApplyStandingDelta(PlayerId, GridFactionId, GridMinStanding - 1).Success);
        var rules = new[] { new FactionGateRuleRow(GridFactionId, GridMinStanding) };
        // Act
        var outcome = FactionGateOperations.TryEvaluate(PlayerId, rules, standingStore);
        // Assert
        Assert.False(outcome.Success);
        Assert.Equal(FactionGateEvaluateReasonCodes.GateBlocked, outcome.ReasonCode);
        Assert.Equal(GridFactionId, outcome.FailingFactionId);
        Assert.Equal(GridMinStanding, outcome.RequiredMinStanding);
        Assert.Equal(GridMinStanding - 1, outcome.CurrentStanding);
    }

    [Fact]
    public void TryEvaluate_ShouldDeny_WhenSecondRuleFailsInAndList()
    {
        // Arrange
        var standingStore = CreateStandingStore();
        Assert.True(standingStore.TryApplyStandingDelta(PlayerId, GridFactionId, GridMinStanding).Success);
        var rules = new[]
        {
            new FactionGateRuleRow(GridFactionId, GridMinStanding),
            new FactionGateRuleRow(RustCollectiveFactionId, 1),
        };
        // Act
        var outcome = FactionGateOperations.TryEvaluate(PlayerId, rules, standingStore);
        // Assert
        Assert.False(outcome.Success);
        Assert.Equal(FactionGateEvaluateReasonCodes.GateBlocked, outcome.ReasonCode);
        Assert.Equal(RustCollectiveFactionId, outcome.FailingFactionId);
        Assert.Equal(1, outcome.RequiredMinStanding);
        Assert.Equal(0, outcome.CurrentStanding);
    }

    [Fact]
    public void TryEvaluate_ShouldDenyUnknownFaction_WhenStoreDenies()
    {
        // Arrange
        var standingStore = CreateStandingStore();
        const string unknownFactionId = "prototype_faction_missing";
        var rules = new[] { new FactionGateRuleRow(unknownFactionId, 0) };
        // Act
        var outcome = FactionGateOperations.TryEvaluate(PlayerId, rules, standingStore);
        // Assert
        Assert.False(outcome.Success);
        Assert.Equal(FactionStandingReasonCodes.UnknownFaction, outcome.ReasonCode);
        Assert.Equal(unknownFactionId, outcome.FailingFactionId);
    }

    [Fact]
    public async Task Host_ShouldResolveStandingStoreForGateEval_WhenStartupSucceeds()
    {
        // Arrange — missing standing row reads as 0 (neutral), below grid contract minStanding 15.
        await using var factory = new InMemoryWebApplicationFactory();
        using var client = factory.CreateClient();
        _ = await client.GetAsync("/health");
        var standingStore = factory.Services.GetRequiredService<IFactionStandingStore>();
        var rules = new[] { new FactionGateRuleRow(GridFactionId, GridMinStanding) };
        // Act
        var outcome = FactionGateOperations.TryEvaluate(PlayerId, rules, standingStore);
        // Assert
        Assert.False(outcome.Success);
        Assert.Equal(FactionGateEvaluateReasonCodes.GateBlocked, outcome.ReasonCode);
    }

    private static InMemoryFactionStandingStore CreateStandingStore()
    {
        var registry = CreatePrototypeRegistry();
        var options = Options.Create(new GamePositionOptions { DevPlayerId = PlayerId });
        return new InMemoryFactionStandingStore(options, registry);
    }

    private static FactionDefinitionRegistry CreatePrototypeRegistry()
    {
        var byId = new Dictionary<string, FactionDefRow>(StringComparer.Ordinal)
        {
            [GridFactionId] = PrototypeE7M3FactionCatalogRules.ExpectedFactionFreeze[GridFactionId],
            [RustCollectiveFactionId] = PrototypeE7M3FactionCatalogRules.ExpectedFactionFreeze[RustCollectiveFactionId],
        };
        var catalog = new FactionDefinitionCatalog("/tmp/catalog", byId, catalogJsonFileCount: 1);
        return new FactionDefinitionRegistry(catalog);
    }
}