using NUnit.Framework;

using MultiversalDiplomacy.Model;
using MultiversalDiplomacy.Orders;
using MultiversalDiplomacy.Script;

namespace MultiversalDiplomacyTests;

public class ReplTest
{
    private static ReplDriver StandardRepl() => new(
        new SetupScriptHandler(
            (msg) => {/* discard*/},
            World.WithStandardMap(),
            strict: true));

    [Test]
    public void SetupHandler()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Munich
        unit Austria Army Tyrolia
        unit England F Lon
        """].AssertReady();

        Assert.That(repl.Handler, Is.TypeOf<SetupScriptHandler>());
        SetupScriptHandler handler = (SetupScriptHandler)repl.Handler!;
        Assert.That(handler.World.Units.Count, Is.EqualTo(3));
        Assert.That(handler.World.GetUnitAt("Mun"), Is.Not.Null);
        Assert.That(handler.World.GetUnitAt("Tyr"), Is.Not.Null);
        Assert.That(handler.World.GetUnitAt("Lon"), Is.Not.Null);

        repl["""
        ---
        """].AssertReady();

        Assert.That(repl.Handler, Is.TypeOf<GameScriptHandler>());
    }

    [Test]
    public void SubmitOrders()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        unit Austria A Tyr
        unit England F Lon
        ---
        Germany A Mun hold
        Austria: Army Tyrolia - Vienna
        England:
        Lon h
        """].AssertReady();

        Assert.That(repl.Handler, Is.TypeOf<GameScriptHandler>());
        GameScriptHandler handler = (GameScriptHandler)repl.Handler!;
        Assert.That(handler.Orders.Count, Is.EqualTo(3));
        Assert.That(handler.Orders.Single(o => o.Power == "Germany"), Is.TypeOf<HoldOrder>());
        Assert.That(handler.Orders.Single(o => o.Power == "Austria"), Is.TypeOf<MoveOrder>());
        Assert.That(handler.Orders.Single(o => o.Power == "England"), Is.TypeOf<HoldOrder>());
        Assert.That(handler.World.Timelines.Pasts.Count, Is.EqualTo(1));

        World before = handler.World;

        repl["""
        ---
        """].AssertReady();

        Assert.That(repl.Handler, Is.TypeOf<AdjudicationQueryScriptHandler>());
        var newHandler = (AdjudicationQueryScriptHandler)repl.Handler!;
        Assert.That(newHandler.World, Is.Not.EqualTo(before));
        Assert.That(newHandler.World.Timelines.Pasts.Count, Is.EqualTo(2));
    }

    [Test]
    public void AssertBasic()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Munich
        ---
        ---
        assert true
        """].AssertReady();

        repl["assert false"].AssertClosed();
    }

    [Test]
    public void AssertInvalidOrder()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        ---
        Germany A Mun - Mars
        ---
        """].AssertReady();

        // Assertion should pass for an invalid order
        repl["assert order-invalid Mun"].AssertReady();
        // Assertion should fail for an invalid order
        repl["assert order-valid Mun"].AssertClosed();
    }

    [Test]
    public void AssertValidOrder()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        ---
        Germany A Mun - Tyr
        ---
        """].AssertReady();

        // Assertion should pass for a valid order
        repl["assert order-valid Mun"].AssertReady();
        // Assertion should fail for a valid order
        repl["assert order-invalid Mun"].AssertClosed();
    }

    [Test]
    public void AssertSeasonPast()
    {
        var repl = StandardRepl();

        repl["""
        unit England F London
        ---
        ---
        """].AssertReady();

        // Assertion should pass for a season's past
        repl["assert has-past a1>a0"].AssertReady();
        // Assertion should fail for an incorrect past
        repl["assert has-past a0>a1"].AssertClosed();
    }

    [Test]
    public void AssertHolds()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        unit Austria A Tyr
        ---
        Germany Mun - Tyr
        ---
        """].AssertReady();

        // Assertion should pass for a repelled move
        repl["assert holds Tyr"].AssertReady();
        // Assertion should fail for a repelled move
        repl["assert dislodged Tyr"].AssertClosed();
    }

    [Test]
    public void AssertDislodged()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        unit Germany A Boh
        unit Austria A Tyr
        ---
        Germany Mun - Tyr
        Germany Boh s Mun - Tyr
        ---
        """].AssertReady();

        // Assertion should pass for a dislodge
        repl["assert dislodged Tyr"].AssertReady();
        // Assertion should fail for a repelled move
        repl["assert holds Tyr"].AssertClosed();
    }

    [Test]
    public void AssertMoves()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        ---
        Germany Mun - Tyr
        ---
        """].AssertReady();

        // Assertion should pass for a move
        repl["assert moves Mun"].AssertReady();
        // Assertion should fail for a successful move
        repl["assert no-move Mun"].AssertClosed();
    }

    [Test]
    public void AssertRepelled()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        unit Austria A Tyr
        ---
        Germany Mun - Tyr
        ---
        """].AssertReady();

        // Assertion should pass for a repelled move
        repl["assert no-move Mun"].AssertReady();
        // Assertion should fail for no move
        repl["assert moves Mun"].AssertClosed();
    }

    [Test]
    public void AssertSupports()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        unit Germany A Boh
        unit Austria A Tyr
        ---
        Germany:
        Mun - Tyr
        Boh s Mun - Tyr
        ---
        """].AssertReady();

        // `supports` and `cut` are opposites
        repl["assert supports Boh"].AssertReady();
        repl["assert cut Boh"].AssertClosed();
    }

    [Test]
    public void AssertCutSupport()
    {
        var repl = StandardRepl();

        repl["""
        unit Germany A Mun
        unit Germany A Boh
        unit Austria A Tyr
        unit Italy A Vienna
        ---
        Germany:
        Mun - Tyr
        Boh s Mun - Tyr

        Italy Vienna - Boh
        ---
        """].AssertReady();

        // `supports` and `cut` are opposites
        repl["assert cut Boh"].AssertReady();
        repl["assert supports Boh"].AssertClosed();
    }
}