using Microsoft.AspNetCore.Mvc;
using SVSim.Database.Enums;
using SVSim.Database.Models;
using SVSim.Database.Repositories.Card;
using SVSim.Database.Repositories.Collectibles;
using SVSim.Database.Repositories.Globals;
using SVSim.Database.Repositories.Viewer;
using SVSim.EmulatedEntrypoint.Constants;
using SVSim.EmulatedEntrypoint.Models.Dtos;
using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
using SVSim.EmulatedEntrypoint.Models.Dtos.Responses;

namespace SVSim.EmulatedEntrypoint.Controllers;

public class LoadController : SVSimController
{
    // Per-format rank entries the wire expects (5 entries, in deck_format discriminator order).
    // Hard-coded until viewer rank-state is persisted (see audit §6 #1).
    private static readonly Format[] RankFormats =
    {
        Format.Rotation, Format.Unlimited, Format.MyRotation, Format.Avatar, Format.Crossover
    };

    // Until ShadowverseCardSetEntry is seeded by CardImport, hard-code a stub so the client
    // doesn't crash on RotationCardSetList[1] / [Count-1] (LoadDetail.cs:184).
    private static readonly List<CardSetIdentifier> StubRotationSets = new()
    {
        new CardSetIdentifier { SetId = 10000 },
        new CardSetIdentifier { SetId = 10005 },
        new CardSetIdentifier { SetId = 10010 }
    };

    private readonly IViewerRepository _viewerRepository;
    private readonly ICardRepository _cardRepository;
    private readonly ICollectionRepository _collectionRepository;
    private readonly IGlobalsRepository _globalsRepository;

    public LoadController(IViewerRepository viewerRepository, ICardRepository cardRepository,
        ICollectionRepository collectionRepository, IGlobalsRepository globalsRepository)
    {
        _viewerRepository = viewerRepository;
        _cardRepository = cardRepository;
        _collectionRepository = collectionRepository;
        _globalsRepository = globalsRepository;
    }

    [HttpPost("index")]
    public async Task<ActionResult<IndexResponse>> Index(IndexRequest request)
    {
        var shortUdidClaim = User.Claims.FirstOrDefault(c => c.Type == ShadowverseClaimTypes.ShortUdidClaim)?.Value;
        if (shortUdidClaim is null || !long.TryParse(shortUdidClaim, out long shortUdid))
        {
            return Unauthorized();
        }

        Viewer? viewer = await _viewerRepository.GetViewerByShortUdid(shortUdid);
        if (viewer is null)
        {
            return NotFound();
        }

        // Cards. Empty until CardImport lands (audit §3 — user_card_list is blocked).
        List<ShadowverseCardEntry> allCollectibleCards = await _cardRepository.GetAll(true);
        List<ShadowverseCardEntry> allBasicCards = await _cardRepository.GetAllBasic();
        List<OwnedCardEntry> ownedCards = viewer.Cards;
        List<OwnedCardEntry> allCardsAsOwned = allCollectibleCards.GroupJoin(ownedCards,
            card => card.Id,
            ownedCard => ownedCard.Card.Id,
            (card, foundOwnedCards) => foundOwnedCards.DefaultIfEmpty().FirstOrDefault() ?? new OwnedCardEntry
            {
                Card = card,
                Count = 0,
                IsProtected = false
            }).ToList();
        allCardsAsOwned = allCardsAsOwned.Union(allBasicCards.Select(bc => new OwnedCardEntry
        {
            Card = bc,
            Count = 3,
            IsProtected = true
        })).ToList();

        List<LeaderSkinEntry> allLeaderSkins = await _collectionRepository.GetLeaderSkins();
        var classExpCurve = await _globalsRepository.GetClassExpCurve();

        List<ClassExp> classExps = new();
        int accumulateExp = 0;
        int? prevNecessaryExp = null;
        foreach (var entry in classExpCurve)
        {
            accumulateExp += entry.NecessaryExp;
            classExps.Add(new ClassExp
            {
                Level = entry.Id,
                NecessaryExp = entry.NecessaryExp,
                DiffExp = prevNecessaryExp.HasValue ? entry.NecessaryExp - prevNecessaryExp.Value : entry.NecessaryExp,
                AccumulateExp = accumulateExp
            });
            prevNecessaryExp = entry.NecessaryExp;
        }

        List<CardSetIdentifier> rotationSets = (await _cardRepository.GetCardSets(true))
            .Select(set => new CardSetIdentifier { SetId = set.Id })
            .ToList();
        if (rotationSets.Count < 2)
        {
            rotationSets = StubRotationSets;
        }

        var deviceHeader = Request.Headers["DEVICE"].FirstOrDefault();
        int deviceType = int.TryParse(deviceHeader, out int parsed) ? parsed : 0;

        return new IndexResponse
        {
            UserTutorial = new UserTutorial
            {
                TutorialStep = viewer.MissionData.TutorialState
            },
            UserInfo = new UserInfo(deviceType, viewer),
            UserCurrency = new UserCurrency(viewer),
            UserItems = viewer.Items.Select(item => new UserItem(item)).ToList(),
            UserRotationDecks = new UserFormatDeckInfo
            {
                UserDecks = viewer.Decks.Where(d => d.Format == Format.Rotation)
                    .Select(d => new UserDeck(d)).ToList()
            },
            UserUnlimitedDecks = new UserFormatDeckInfo
            {
                UserDecks = viewer.Decks.Where(d => d.Format == Format.Unlimited)
                    .Select(d => new UserDeck(d)).ToList()
            },
            UserMyRotationDecks = new UserFormatDeckInfo
            {
                UserDecks = viewer.Decks.Where(d => d.Format == Format.MyRotation)
                    .Select(d => new UserDeck(d)).ToList()
            },
            UserCards = allCardsAsOwned.Select(card => new UserCard(card)).ToList(),
            UserClasses = viewer.Classes.Select(vc => new UserClass(vc)).ToList(),
            Sleeves = viewer.Sleeves.Select(s => new SleeveIdentifier { SleeveId = s.Id }).ToList(),
            UserEmblems = viewer.Emblems.Select(e => new EmblemIdentifier { EmblemId = e.Id }).ToList(),
            UserDegrees = viewer.Degrees.Select(d => new DegreeIdentifier { DegreeId = d.Id }).ToList(),
            LeaderSkins = allLeaderSkins
                .Select(skin => new UserLeaderSkin(skin, viewer.LeaderSkins.Any(vs => vs.Id == skin.Id)))
                .ToList(),
            MyPageBackgrounds = viewer.MyPageBackgrounds.Select(mpbg => mpbg.Id.ToString()).ToList(),
            LootBoxRegulations = new LootBoxRegulations(),
            GatheringInfo = new GatheringInfo(),
            IsBattlePassPeriod = 0,
            BattlePassLevelInfo = null,
            SpecialCrystalInfos = new List<SpecialCrystalInfo>(),
            AvatarRotationInfo = null,
            MyRotationInfo = null,
            FeatureMaintenances = new List<FeatureMaintenance>(),
            PreReleaseInfo = null,
            SpotCards = new Dictionary<string, int>(),
            ReprintedCards = new List<long>(),
            UnlimitedBanList = new Dictionary<string, int>(),
            LoadingTipCardExclusions = new List<long>(),
            MaintenanceCards = new List<long>(),
            RedEtherOverrides = new List<RedEtherOverride>(),
            DailyLoginBonus = new DailyLoginBonus(),
            UserRankedMatches = new List<UserRankedMatches>(),
            UserRankInfo = RankFormats.Select(f => new UserRankInfo
            {
                DeckFormat = (int)f,
                Rank = 1,
                BattlePoints = 0,
                WinStreak = 0,
                IsPromotion = 0,
                IsMasterRank = 0,
                IsGrandMasterRank = 0,
                MasterPoints = 0
            }).ToList(),
            ArenaConfig = new ArenaConfig(),
            ArenaInfos = new List<ArenaInfo>(),
            RotationSets = rotationSets,
            UserConfig = new UserConfig(),
            OpenBattlefieldIds = (await _globalsRepository.GetBattlefields(true))
                .Select(bf => bf.Id.ToString()).ToList(),
            DefaultSettings = new DefaultSettings(await _globalsRepository.GetGameConfiguration("default")),
            ClassExp = classExps,
            RankInfo = (await _globalsRepository.GetRankInfo()).Select(ri => new RankInfo(ri)).ToList(),
            DeckFormat = 1,
            CardSetIdForResourceDlView = rotationSets.Last().SetId
        };
    }
}