using System.Collections.Generic;
using UnityEngine;
using Vanguard.App;
using Vanguard.Shared.Protocol;
using Vanguard.UI;

namespace Vanguard.Board3D
{
    /// <summary>
    /// Демо-сцена 3D-поля: раскладывает карты без сервера, чтобы проверять
    /// геометрию, drag&amp;drop, rest, закрытые карты и общий круг защиты.
    /// </summary>
    public sealed class PlaymatSandbox : MonoBehaviour
    {
        public PlaymatLayoutConfig config;
        public bool showHints = true;

        private GameBoard3D _board;
        private int _clicks;

        private void Start()
        {
            SceneEnvironment.Build(SceneTheme.Battle);

            _board = GameBoard3D.Create(null, config != null ? config : PlaymatLayoutConfig.Default);
            _board.ArtProvider = SandboxArt;
            _board.SetVisible(true);
            _board.CardClicked += OnCardClicked;
            _board.SlotClicked += OnSlotClicked;
            _board.CardDropped += OnCardDropped;
            _board.PileClicked += OnPileClicked;
            _board.Render(BuildDemo(), BuildState());
        }

        private void OnCardClicked(BoardCardRef card)
        {
            _clicks++;
            Debug.Log("SANDBOX card " + card);
        }

        private void OnSlotClicked(BoardCardRef slot)
        {
            Debug.Log("SANDBOX slot " + slot);
        }

        private void OnCardDropped(BoardCardRef source, BoardCardRef target)
        {
            Debug.Log("SANDBOX drop " + source + " -> " + target);
            // В песочнице нет сервера: возвращаем карту на место.
            _board.Render(BuildDemo(), BuildState());
        }

        private void OnPileClicked(BoardCardRef pile)
        {
            Debug.Log("SANDBOX pile " + pile + " count=" + pile.Index);
        }

        private static BoardArt SandboxArt(string printingId)
        {
            var texture = LoadSandboxTexture(printingId);
            if (texture != null)
                return new BoardArt(texture, Color.white, printingId);

            var clan = printingId != null && printingId.Contains("002")
                ? "Kagero"
                : "RoyalPaladin";
            var sprite = CardArt.ForCard(printingId ?? "sandbox", clan);
            return new BoardArt(
                sprite != null ? sprite.texture : null,
                CardArt.ClanColor(clan),
                printingId);
        }

        private static Texture2D LoadSandboxTexture(string printingId)
        {
            if (string.IsNullOrEmpty(printingId))
                return null;

            var slash = printingId.IndexOf('/');
            if (slash <= 0 || slash >= printingId.Length - 1)
                return null;

            var set = printingId.Substring(0, slash).ToLowerInvariant();
            var tail = printingId.Substring(slash + 1);
            var number = string.Empty;
            for (var i = 0; i < tail.Length; i++)
            {
                var c = tail[i];
                if (char.IsDigit(c) || (i == 0 && (c == 'S' || c == 's')))
                {
                    number += char.ToLowerInvariant(c);
                    continue;
                }

                break;
            }

            if (number.Length == 0)
                return null;

            return Resources.Load<Texture2D>("CardArt/" + set + "_" + number);
        }

        private static BoardRenderState BuildState()
        {
            var state = new BoardRenderState();
            state.Highlights.Add(new BoardSlotKey(0, -1));
            state.Highlights.Add(new BoardSlotKey(1, -1));
            state.SelectedHandInstanceIds.Add(12);
            state.DropTargets.Add(new BoardSlotKey(0, -1));
            for (var slot = 0; slot < PlaymatLayout.RearGuardCount; slot++)
                state.DropTargets.Add(new BoardSlotKey(0, slot));
            state.GuardianDropAllowed = true;
            return state;
        }

        private static MatchView BuildDemo()
        {
            CardView Card(string id, int instance, bool rested = false, bool faceUp = true) =>
                new CardView
                {
                    PrintingId = id,
                    InstanceId = instance,
                    Rested = rested,
                    FaceUp = faceUp,
                    BasePower = 8000,
                    Power = rested ? 5000 : 8000,
                    BaseCritical = 1,
                    Critical = 1,
                };

            var self = new PlayerView
            {
                Index = 0,
                Name = "Sandbox",
                Vanguard = Card("BT01/001EN", 1),
                RearGuards = new CardView[5],
                Hand = new List<CardView>
                {
                    Card("BT01/002EN", 11),
                    Card("BT01/003EN", 12),
                    Card("BT01/004EN", 13),
                    Card("BT01/005EN", 14),
                    Card("BT01/006EN", 15),
                },
                Guardian = new List<CardView>
                {
                    Card("BT01/007EN", 21),
                    Card("BT01/008EN", 22),
                },
                Soul = new List<CardView>
                {
                    Card("BT01/009EN", 31),
                    Card("BT01/010EN", 32),
                },
                FaceDownDamage = 2,
                FaceUpDamage = new List<CardView>
                {
                    Card("BT01/011EN", 41),
                    Card("BT01/012EN", 42),
                },
                DeckCount = 38,
                Drop = new List<CardView> { Card("BT01/013EN", 51) },
            };
            self.RearGuards[0] = Card("BT01/014EN", 2);
            self.RearGuards[3] = Card("BT01/015EN", 3, rested: true);
            self.RearGuards[4] = Card("BT01/016EN", 4);

            var opponent = new PlayerView
            {
                Index = 1,
                Name = "Opponent",
                Vanguard = Card("BT01/020EN", 101),
                RearGuards = new CardView[5],
                Hand = new List<CardView>(),
                Guardian = new List<CardView>(),
                Soul = new List<CardView> { Card("BT01/021EN", 131) },
                FaceDownDamage = 1,
                FaceUpDamage = new List<CardView> { Card("BT01/022EN", 141) },
                DeckCount = 40,
                Drop = new List<CardView>(),
            };
            opponent.RearGuards[4] = Card("BT01/023EN", 102);
            opponent.RearGuards[2] = Card("BT01/024EN", 103, rested: true);

            return new MatchView
            {
                MatchId = "sandbox",
                You = 0,
                ActivePlayer = 0,
                TurnNumber = 4,
                Phase = GamePhase.Main,
                Players = new List<PlayerView> { self, opponent },
                Clock = new ClockView(),
                LegalIntents = new List<IntentPayload>(),
            };
        }
    }
}