using NUnit.Framework;
using SVSim.BattleNode.Sessions.Dispatch;

namespace SVSim.UnitTests.BattleNode.Sessions;

[TestFixture]
public class KnownListBuilderTests
{
    // orderList as it arrives in a RawBody: a list of single-key op dicts.
    private static List<object?> OrderListMove(int idx, int from, int to) => new()
    {
        new Dictionary<string, object?>
        {
            ["move"] = new Dictionary<string, object?>
            {
                ["idx"] = new List<object?> { (long)idx },
                ["isSelf"] = 1L, ["from"] = (long)from, ["to"] = (long)to,
            }
        }
    };

    [Test]
    public void ExtractMoveTo_returns_to_for_matching_idx()
    {
        var to = KnownListBuilder.ExtractMoveTo(OrderListMove(3, 10, 20), playIdx: 3);
        Assert.That(to, Is.EqualTo(20));
    }

    [Test]
    public void ExtractMoveTo_returns_null_when_no_move_op_matches()
    {
        Assert.That(KnownListBuilder.ExtractMoveTo(OrderListMove(3, 10, 20), playIdx: 99), Is.Null);
        Assert.That(KnownListBuilder.ExtractMoveTo(null, playIdx: 3), Is.Null);
    }

    [Test]
    public void ExtractMoveTo_returns_first_matching_move_op()
    {
        // A real PlayActions can carry several move ops; the played card's move comes first,
        // later ops (token add/alter) target other idxs. Confirm first-match-wins, not last.
        var orderList = new List<object?>
        {
            new Dictionary<string, object?>
            {
                ["move"] = new Dictionary<string, object?>
                {
                    ["idx"] = new List<object?> { 3L }, ["isSelf"] = 1L, ["from"] = 10L, ["to"] = 30L,
                }
            },
            new Dictionary<string, object?>
            {
                ["move"] = new Dictionary<string, object?>
                {
                    ["idx"] = new List<object?> { 31L, 32L }, ["isSelf"] = 1L, ["from"] = 0L, ["to"] = 40L,
                }
            },
        };
        Assert.That(KnownListBuilder.ExtractMoveTo(orderList, playIdx: 3), Is.EqualTo(30));
        Assert.That(KnownListBuilder.ExtractMoveTo(orderList, playIdx: 31), Is.EqualTo(40));
    }

    [Test]
    public void BuildPlayedCard_returns_null_for_deck_card_with_no_matching_move_op()
    {
        // idx is in the deck, but the orderList has no move op for it → can't synthesize.
        var deckMap = new Dictionary<int, long> { [3] = 128821011L };
        var entry = KnownListBuilder.BuildPlayedCard(deckMap, playIdx: 3, orderList: OrderListMove(7, 10, 20));
        Assert.That(entry, Is.Null);
    }

    [Test]
    public void BuildPlayedCard_synthesizes_entry_for_deck_card()
    {
        var deckMap = new Dictionary<int, long> { [3] = 128821011L };
        var entry = KnownListBuilder.BuildPlayedCard(deckMap, playIdx: 3, orderList: OrderListMove(3, 10, 20));

        Assert.That(entry, Is.Not.Null);
        Assert.That(entry!.Idx, Is.EqualTo(3));
        Assert.That(entry.CardId, Is.EqualTo(128821011L));
        Assert.That(entry.To, Is.EqualTo(20));
        Assert.That(entry.Spellboost, Is.EqualTo(0));
        Assert.That(entry.AttachTarget, Is.EqualTo(""));
    }

    [Test]
    public void BuildPlayedCard_returns_null_for_token_idx_not_in_deck()
    {
        var deckMap = new Dictionary<int, long> { [3] = 128821011L };
        var entry = KnownListBuilder.BuildPlayedCard(deckMap, playIdx: 31, orderList: OrderListMove(31, 10, 20));
        Assert.That(entry, Is.Null);
    }

    [Test]
    public void RenameTargets_passes_isSelf_through_verbatim()
    {
        var targetList = new List<object?>
        {
            new Dictionary<string, object?> { ["targetIdx"] = 8L, ["isSelf"] = 0L },
        };
        var renamed = KnownListBuilder.RenameTargets(targetList);

        Assert.That(renamed, Is.Not.Null);
        Assert.That(renamed!.Count, Is.EqualTo(1));
        Assert.That(renamed[0].TargetIdx, Is.EqualTo(8));
        Assert.That(renamed[0].IsSelf, Is.EqualTo(0));
    }

    [Test]
    public void RenameTargets_returns_null_for_missing_or_empty()
    {
        Assert.That(KnownListBuilder.RenameTargets(null), Is.Null);
        Assert.That(KnownListBuilder.RenameTargets(new List<object?>()), Is.Null);
    }

    // An add op as it arrives in a RawBody: { "add": { "idx": [..], "isSelf": n, "card": { "cardId": n } } }
    private static Dictionary<string, object?> AddOp(long[] idxs, long cardId, long isSelf = 1) => new()
    {
        ["add"] = new Dictionary<string, object?>
        {
            ["idx"] = idxs.Select(i => (object?)i).ToList(),
            ["isSelf"] = isSelf,
            ["card"] = new Dictionary<string, object?> { ["cardId"] = cardId },
        }
    };

    [Test]
    public void MineAddOps_yields_idx_to_cardId_for_every_idx_in_an_add_op()
    {
        var orderList = new List<object?> { AddOp(new[] { 31L, 32L }, 900111010L) };
        var mined = KnownListBuilder.MineAddOps(orderList).ToList();

        Assert.That(mined, Is.EquivalentTo(new[] { (31, 900111010L), (32, 900111010L) }));
    }

    [Test]
    public void MineAddOps_skips_add_ops_for_the_opponent_isSelf_0()
    {
        // A card given to the opponent (isSelf:0) belongs in the other side's map — deferred.
        var orderList = new List<object?> { AddOp(new[] { 31L }, 900111010L, isSelf: 0) };
        Assert.That(KnownListBuilder.MineAddOps(orderList), Is.Empty);
    }

    [Test]
    public void MineAddOps_skips_choice_adds_with_no_concrete_cardId()
    {
        // { "add": { "idx":[46], "card": { "candidates":[...] }, "isChoice":"1" } } — identity undetermined.
        var orderList = new List<object?>
        {
            new Dictionary<string, object?>
            {
                ["add"] = new Dictionary<string, object?>
                {
                    ["idx"] = new List<object?> { 46L },
                    ["isSelf"] = 1L,
                    ["card"] = new Dictionary<string, object?>
                    {
                        ["candidates"] = new List<object?> { 810041260L, 101041020L },
                    },
                    ["isChoice"] = "1",
                }
            }
        };
        Assert.That(KnownListBuilder.MineAddOps(orderList), Is.Empty);
    }

    [Test]
    public void MineAddOps_skips_copy_token_adds_with_baseIdx_and_no_cardId()
    {
        // RegisterCopyToken.MakeCardData → { "baseIdx": N, "isPremium": 0 } — no cardId, deferred.
        var orderList = new List<object?>
        {
            new Dictionary<string, object?>
            {
                ["add"] = new Dictionary<string, object?>
                {
                    ["idx"] = new List<object?> { 33L },
                    ["isSelf"] = 1L,
                    ["card"] = new Dictionary<string, object?> { ["baseIdx"] = 12L, ["isPremium"] = 0L },
                }
            }
        };
        Assert.That(KnownListBuilder.MineAddOps(orderList), Is.Empty);
    }

    [Test]
    public void MineAddOps_ignores_non_add_ops_and_null()
    {
        Assert.That(KnownListBuilder.MineAddOps(OrderListMove(3, 10, 20)), Is.Empty);
        Assert.That(KnownListBuilder.MineAddOps(null), Is.Empty);
    }

    [Test]
    public void MineAddOps_yields_from_multiple_add_ops_in_one_orderList()
    {
        var orderList = new List<object?>
        {
            new Dictionary<string, object?> { ["move"] = new Dictionary<string, object?>
                { ["idx"] = new List<object?> { 3L }, ["isSelf"] = 1L, ["from"] = 10L, ["to"] = 30L } },
            AddOp(new[] { 31L }, 900111010L),
            AddOp(new[] { 32L }, 900811090L),
        };
        var mined = KnownListBuilder.MineAddOps(orderList).ToList();
        Assert.That(mined, Is.EquivalentTo(new[] { (31, 900111010L), (32, 900811090L) }));
    }
}