import './style.css';
import * as THREE from 'three';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';

// --- CONFIGURACIÓN DE LA ESCENA ---
const CONFIG = {
    CELL_SIZE: 2,           // Unidades de Three.js por celda lógica
    TILE_DIMENSIONS: 4,     // Una tile es de 4x4 celdas
};

// --- ESTADO DEL JUEGO (DATA MODEL) ---
const ASSETS = {
    tiles: {
        'tile_base': { src: '/assets/images/tiles/tile4x4.png', width: 4, height: 4 },
        'tile_8x4': { src: '/assets/images/tiles/tile4x4.png', width: 8, height: 4 },
        'tile_4x8': { src: '/assets/images/tiles/tile4x4.png', width: 4, height: 8 },
        'tile_8x8': { src: '/assets/images/tiles/tile4x4.png', width: 8, height: 8 },
        'tile_cyan': { src: '/assets/images/tiles/tile4x4_blue.png', width: 4, height: 4 },
        'tile_orange': { src: '/assets/images/tiles/tile4x4_orange.png', width: 4, height: 4 },
        'wall_1': { src: '/assets/images/tiles/pared1.png' },
        'door_1': { src: '/assets/images/tiles/puerta1.png' },
    },
    standees: {
        'hero_1': { src: '/assets/images/standees/barbaro.png', height: 3 },
        'hero_2': { src: '/assets/images/standees/esqueleto.png', height: 3 },
    }
};

// Sistema de salas
// --- GENERADOR PROCEDURAL DE MAZMORRAS ---
function generateDungeon() {
    const rooms = [];
    const maxRooms = 15;

    // Configuración de reglas de generación (Pesos y Límites)
    const GENERATION_RULES = {
        'tile_base': { weight: 60, max: Infinity }, // 4x4 (Muy común)
        'tile_8x4': { weight: 15, max: Infinity }, // Pasillo H (Medio)
        'tile_4x8': { weight: 15, max: Infinity }, // Pasillo V (Medio)
        'tile_8x8': { weight: 10, max: 2 }         // Sala Grande (Rara, max 2)
    };

    let entityIdCounter = 100;

    // Helper para verificar si un área está libre
    // Ocupación se guarda como strings "x,y" para cada bloque de 4x4
    const occupied = new Set();

    function markOccupied(x, y, width, height) {
        for (let i = 0; i < width; i += 4) {
            for (let j = 0; j < height; j += 4) {
                occupied.add(`${x + i},${y + j}`);
            }
        }
    }

    function isAreaFree(x, y, width, height) {
        for (let i = 0; i < width; i += 4) {
            for (let j = 0; j < height; j += 4) {
                if (occupied.has(`${x + i},${y + j}`)) return false;
            }
        }
        return true;
    }

    // Helper para elegir tipo de sala según pesos
    function pickRandomRoomType() {
        // 1. Contar cuántas de cada tipo tenemos ya
        const currentCounts = {};
        Object.keys(GENERATION_RULES).forEach(k => currentCounts[k] = 0);
        rooms.forEach(r => {
            if (currentCounts[r.tile.type] !== undefined) {
                currentCounts[r.tile.type]++;
            }
        });

        // 2. Filtrar candidatos válidos (que no superen su max)
        const candidates = Object.keys(GENERATION_RULES).filter(type => {
            return currentCounts[type] < GENERATION_RULES[type].max;
        });

        // 3. Calcular peso total de los candidatos
        const totalWeight = candidates.reduce((sum, type) => sum + GENERATION_RULES[type].weight, 0);

        // 4. Elegir aleatoriamente
        let random = Math.random() * totalWeight;

        for (const type of candidates) {
            random -= GENERATION_RULES[type].weight;
            if (random <= 0) {
                return type;
            }
        }

        return 'tile_base'; // Fallback por seguridad
    }

    // Sala inicial (siempre 4x4 en 0,0 con el héroe)
    const startTileKey = 'tile_base';
    rooms.push({
        id: 1,
        tile: { type: startTileKey, x: 0, y: 0 },
        walls: ['N', 'S', 'E', 'W'],
        doors: [],
        entities: [{ id: entityIdCounter++, type: 'hero_1', x: 1, y: 1 }]
    });
    // Marcar ocupado el área de la sala inicial
    markOccupied(0, 0, ASSETS.tiles[startTileKey].width, ASSETS.tiles[startTileKey].height);

    // Direcciones posibles: N, S, E, W
    // Nota: dx/dy se calcularán dinámicamente
    const directions = [
        { side: 'N', opposite: 'S' },
        { side: 'S', opposite: 'N' },
        { side: 'E', opposite: 'W' },
        { side: 'W', opposite: 'E' }
    ];

    // Cola de salas para expandir
    const queue = [rooms[0]];

    while (rooms.length < maxRooms && queue.length > 0) {
        const currentRoom = queue.shift();
        const currentTileDef = ASSETS.tiles[currentRoom.tile.type];

        // Intentar añadir salas en direcciones aleatorias
        const shuffledDirections = [...directions].sort(() => Math.random() - 0.5);

        for (const dir of shuffledDirections) {
            if (rooms.length >= maxRooms) break;

            // Selección ponderada del tipo de sala
            const nextTileType = pickRandomRoomType();
            const nextTileDef = ASSETS.tiles[nextTileType];

            // Calcular posición de la nueva sala según la dirección
            let newX, newY;

            // Estrategia de alineación: Alineamos siempre a "top-left" relativo a la dirección de crecimiento.
            // Esto asegura que al menos un segmento de 4x4 coincida para poner la puerta.
            if (dir.side === 'N') {
                newX = currentRoom.tile.x; // Alineado a la izquierda
                newY = currentRoom.tile.y - nextTileDef.height;
            } else if (dir.side === 'S') {
                newX = currentRoom.tile.x; // Alineado a la izquierda
                newY = currentRoom.tile.y + currentTileDef.height;
            } else if (dir.side === 'E') {
                newX = currentRoom.tile.x + currentTileDef.width;
                newY = currentRoom.tile.y; // Alineado arriba
            } else if (dir.side === 'W') {
                newX = currentRoom.tile.x - nextTileDef.width;
                newY = currentRoom.tile.y; // Alineado arriba
            }

            // Verificar si el área está libre
            if (!isAreaFree(newX, newY, nextTileDef.width, nextTileDef.height)) continue;

            // 40% de probabilidad de no crear sala en esta dirección (si hay espacio)
            // reducimos la probabilidad de fallo para fomentar estructura más densa con salas grandes
            if (Math.random() < 0.3) continue;

            // Crear nueva sala
            const newRoomId = rooms.length + 1;

            // Generar entidades (esqueletos)
            // En salas grandes ponemos más bichos potencialmente
            const areaFactor = (nextTileDef.width * nextTileDef.height) / 16;
            const maxSkeletons = Math.floor(2 * areaFactor);
            const numSkeletons = Math.floor(Math.random() * (maxSkeletons + 1));
            const newEntities = [];

            for (let i = 0; i < numSkeletons; i++) {
                const randomX = newX + Math.floor(Math.random() * nextTileDef.width);
                const randomY = newY + Math.floor(Math.random() * nextTileDef.height);

                newEntities.push({
                    id: entityIdCounter++,
                    type: 'hero_2',
                    x: randomX,
                    y: randomY
                });
            }

            const newRoom = {
                id: newRoomId,
                tile: { type: nextTileType, x: newX, y: newY },
                walls: ['N', 'S', 'E', 'W'],
                doors: [],
                entities: newEntities
            };

            // Añadir y marcar
            rooms.push(newRoom);
            markOccupied(newX, newY, nextTileDef.width, nextTileDef.height);
            queue.push(newRoom);

            // CREAR PUERTAS
            // Siempre ponemos la puerta en los primeros 4 tiles de la conexión, que sabemos que existen por la alineación.
            // gridPos entre 1 y 2 (dejando margenes de 1 celda en bordes de 4)
            const doorGridPos = Math.floor(Math.random() * 2) + 1;

            // Puerta en la sala actual (origen)
            // Ojo: gridX/Y es relativo al origen de la sala.
            // Como alineamos coordenadas:
            // N/S: Alineados en X -> puerta en X relativo es igual para ambos.
            // E/W: Alineados en Y -> puerta en Y relativo es igual para ambos.

            const doorConfig = dir.side === 'N' || dir.side === 'S'
                ? { side: dir.side, gridX: doorGridPos, leadsTo: newRoomId }
                : { side: dir.side, gridY: doorGridPos, leadsTo: newRoomId };

            currentRoom.doors.push(doorConfig);

            // Puerta en la sala nueva (destino)
            // Necesitamos calcular la posición relativa correcta.
            // Al estar alineados top/left, el offset relativo es el mismo (doorGridPos).
            // (Si hubieramos centrado las salas, esto sería más complejo)

            const oppositeDoorConfig = dir.opposite === 'N' || dir.opposite === 'S'
                ? { side: dir.opposite, gridX: doorGridPos, leadsTo: currentRoom.id }
                : { side: dir.opposite, gridY: doorGridPos, leadsTo: currentRoom.id };

            newRoom.doors.push(oppositeDoorConfig);
        }
    }

    // Limpiar puertas inválidas (paranoia check)
    const existingRoomIds = new Set(rooms.map(r => r.id));
    rooms.forEach(room => {
        room.doors = room.doors.filter(door => existingRoomIds.has(door.leadsTo));
    });

    return {
        rooms: rooms,
        visitedRooms: new Set([1]),
        currentRoom: 1
    };
}

const ROOMS = generateDungeon();

const SESSION = {
    selectedUnitId: null,
    path: [], // Array de {x, y}
    pathMeshes: [], // Array de meshes visuales
    roomMeshes: {}, // { roomId: { tile: mesh, walls: [], doors: [], entities: [] } }
    isAnimating: false,
    textureCache: {}, // Cache de texturas cargadas
    currentView: 'N' // Vista actual: N, S, E, W
};

// --- CONFIGURACIÓN BÁSICA THREE.JS ---
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x202020);

// Renderer
const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMap.enabled = true;
document.querySelector('#app').appendChild(renderer.domElement);

// Cámara isométrica (zoom más cercano)
const aspect = window.innerWidth / window.innerHeight;
const d = 8;
const camera = new THREE.OrthographicCamera(-d * aspect, d * aspect, d, -d, 1, 1000);

// Vistas isométricas COMPLETAMENTE predefinidas (sin acumulación de errores)
// Cada vista tiene posición, target Y quaternion fijo
const CAMERA_VIEWS = {
    N: {
        position: new THREE.Vector3(20, 20, 20),
        target: new THREE.Vector3(0, 0, 0),
        up: new THREE.Vector3(0, 1, 0)
    },
    S: {
        position: new THREE.Vector3(-20, 20, -20),
        target: new THREE.Vector3(0, 0, 0),
        up: new THREE.Vector3(0, 1, 0)
    },
    E: {
        position: new THREE.Vector3(-20, 20, 20),
        target: new THREE.Vector3(0, 0, 0),
        up: new THREE.Vector3(0, 1, 0)
    },
    W: {
        position: new THREE.Vector3(20, 20, -20),
        target: new THREE.Vector3(0, 0, 0),
        up: new THREE.Vector3(0, 1, 0)
    }
};

// Precalcular quaternions para cada vista (FIJOS, nunca cambian)
Object.keys(CAMERA_VIEWS).forEach(key => {
    const view = CAMERA_VIEWS[key];
    const tempCamera = new THREE.PerspectiveCamera();
    tempCamera.position.copy(view.position);
    tempCamera.up.copy(view.up);
    tempCamera.lookAt(view.target);
    view.quaternion = tempCamera.quaternion.clone();
});

// OrbitControls solo para zoom y paneo (sin rotación)
const controls = new OrbitControls(camera, renderer.domElement);
controls.enableRotate = false;
controls.enableDamping = true;
controls.dampingFactor = 0.05;
controls.screenSpacePanning = true;
controls.mouseButtons = {
    LEFT: null,
    MIDDLE: THREE.MOUSE.PAN,
    RIGHT: THREE.MOUSE.PAN
};
controls.zoomToCursor = true;
controls.minZoom = 0.5;
controls.maxZoom = 3;

// Determinar opacidad de pared según vista actual
function getWallOpacity(wallSide, viewDirection) {
    const opacityRules = {
        N: { opaque: ['N', 'W'], transparent: ['S', 'E'] },
        S: { opaque: ['S', 'E'], transparent: ['N', 'W'] },
        E: { opaque: ['N', 'E'], transparent: ['S', 'W'] },
        W: { opaque: ['W', 'S'], transparent: ['N', 'E'] }
    };

    const rule = opacityRules[viewDirection];
    if (rule.opaque.includes(wallSide)) {
        return 1.0; // Opaco
    } else {
        return 0.5; // Semi-transparente
    }
}

// Actualizar opacidades de todas las paredes según la vista actual
function updateWallOpacities() {
    Object.values(SESSION.roomMeshes).forEach(roomData => {
        if (roomData.walls) {
            roomData.walls.forEach(wall => {
                const wallSide = wall.userData.wallSide;
                if (wallSide) {
                    const newOpacity = getWallOpacity(wallSide, SESSION.currentView);
                    wall.material.opacity = newOpacity;
                    wall.material.transparent = newOpacity < 1.0;
                }
            });
        }
    });
}


function setCameraView(direction, animate = true) {
    const view = CAMERA_VIEWS[direction];

    // Encontrar el personaje del jugador para centrar la vista
    let playerPosition = new THREE.Vector3(0, 0, 0);
    for (const room of ROOMS.rooms) {
        const player = room.entities.find(e => e.type === 'hero_1');
        if (player && player.mesh) {
            playerPosition.copy(player.mesh.position);
            playerPosition.y = 0;
            break;
        }
    }

    // Calcular offset de la vista (diferencia entre posición y target)
    const viewOffset = view.position.clone().sub(view.target);

    // Nueva posición de cámara centrada en el jugador
    const newPosition = playerPosition.clone().add(viewOffset);
    const newTarget = playerPosition.clone();

    if (animate && SESSION.currentView !== direction) {
        // Animación suave de transición
        const startPos = camera.position.clone();
        const startQuat = camera.quaternion.clone();
        const startTarget = controls.target.clone();

        const duration = 600; // ms
        const startTime = Date.now();

        const animateTransition = () => {
            const elapsed = Date.now() - startTime;
            const progress = Math.min(elapsed / duration, 1);

            // Easing suave (ease-in-out)
            const eased = progress < 0.5
                ? 2 * progress * progress
                : 1 - Math.pow(-2 * progress + 2, 2) / 2;

            // Interpolar posición
            camera.position.lerpVectors(startPos, newPosition, eased);

            // Interpolar quaternion (rotación suave)
            camera.quaternion.slerpQuaternions(startQuat, view.quaternion, eased);

            // Interpolar target
            controls.target.lerpVectors(startTarget, newTarget, eased);

            camera.up.copy(view.up);
            controls.update();

            if (progress < 1) {
                requestAnimationFrame(animateTransition);
            } else {
                // Asegurar valores finales exactos
                camera.position.copy(newPosition);
                camera.quaternion.copy(view.quaternion);
                camera.up.copy(view.up);
                controls.target.copy(newTarget);
                controls.update();
            }
        };

        animateTransition();
    } else {
        // Sin animación (cambio instantáneo)
        camera.position.copy(newPosition);
        camera.quaternion.copy(view.quaternion);
        camera.up.copy(view.up);
        controls.target.copy(newTarget);
        controls.update();
    }

    SESSION.currentView = direction;
    updateCompassUI();
    updateWallOpacities(); // Actualizar opacidades de paredes según nueva vista
}

// Establecer vista inicial
setCameraView('N');

// Luces
const ambientLight = new THREE.AmbientLight(0xffffff, 0.6);
scene.add(ambientLight);

const dirLight = new THREE.DirectionalLight(0xffffff, 0.8);
dirLight.position.set(10, 20, 5);
dirLight.castShadow = true;
scene.add(dirLight);

const gridHelper = new THREE.GridHelper(40, 40, 0x444444, 0x111111);
scene.add(gridHelper);

// Plano invisible para Raycasting
const planeGeometry = new THREE.PlaneGeometry(200, 200);
const planeMaterial = new THREE.MeshBasicMaterial({ visible: false });
const raycastPlane = new THREE.Mesh(planeGeometry, planeMaterial);
raycastPlane.rotation.x = -Math.PI / 2;
scene.add(raycastPlane);

// --- HELPERS LÓGICOS ---
function worldToGrid(x, z) {
    return {
        x: Math.floor(x / CONFIG.CELL_SIZE),
        y: Math.floor(z / CONFIG.CELL_SIZE)
    };
}

function gridToWorld(gridX, gridY) {
    return {
        x: (gridX * CONFIG.CELL_SIZE) + (CONFIG.CELL_SIZE / 2),
        z: (gridY * CONFIG.CELL_SIZE) + (CONFIG.CELL_SIZE / 2)
    };
}

function isAdjacent(p1, p2) {
    const dx = Math.abs(p1.x - p2.x);
    const dy = Math.abs(p1.y - p2.y);
    return (dx === 1 && dy === 0) || (dx === 0 && dy === 1);
}

// Verificar si una posición está dentro de una sala
function isPositionInRoom(x, y, room) {
    const tile = room.tile;
    const tileDef = ASSETS.tiles[tile.type];
    const minX = tile.x;
    const maxX = tile.x + tileDef.width - 1;
    const minY = tile.y;
    const maxY = tile.y + tileDef.height - 1;

    return x >= minX && x <= maxX && y >= minY && y <= maxY;
}

// Verificar si una posición es una puerta
function isPositionDoor(x, y, room) {
    for (const door of room.doors) {
        const doorPos = getDoorGridPosition(room, door);
        if (doorPos.x === x && doorPos.y === y) {
            return true;
        }
    }
    return false;
}

// Verificar si una celda es transitable
function isWalkable(x, y) {
    // Verificar en todas las salas visitadas
    for (const roomId of ROOMS.visitedRooms) {
        const room = ROOMS.rooms.find(r => r.id === roomId);
        if (!room) continue;

        // Si está dentro de la sala, es transitable
        if (isPositionInRoom(x, y, room)) {
            return true;
        }

        // Si es una puerta de la sala, es transitable
        if (isPositionDoor(x, y, room)) {
            return true;
        }
    }

    return false;
}

// --- CREACIÓN DE MARCADORES ---
function createPathMarker(stepNumber) {
    const canvas = document.createElement('canvas');
    canvas.width = 128;
    canvas.height = 128;
    const ctx = canvas.getContext('2d');

    ctx.fillStyle = 'rgba(255, 255, 0, 0.5)';
    ctx.fillRect(0, 0, 128, 128);

    ctx.strokeStyle = 'rgba(255, 200, 0, 0.8)';
    ctx.lineWidth = 10;
    ctx.strokeRect(0, 0, 128, 128);

    ctx.fillStyle = '#000000';
    ctx.font = 'bold 60px Arial';
    ctx.textAlign = 'center';
    ctx.textBaseline = 'middle';
    ctx.fillText(stepNumber.toString(), 64, 64);

    const texture = new THREE.CanvasTexture(canvas);
    texture.minFilter = THREE.LinearFilter;

    const geometry = new THREE.PlaneGeometry(CONFIG.CELL_SIZE * 0.9, CONFIG.CELL_SIZE * 0.9);
    const material = new THREE.MeshBasicMaterial({
        map: texture,
        transparent: true,
        side: THREE.DoubleSide
    });

    const mesh = new THREE.Mesh(geometry, material);
    mesh.rotation.x = -Math.PI / 2;
    mesh.position.y = 0.05;
    return mesh;
}

function updatePathVisuals() {
    SESSION.pathMeshes.forEach(mesh => scene.remove(mesh));
    SESSION.pathMeshes = [];

    SESSION.path.forEach((pos, index) => {
        const marker = createPathMarker(index + 1);
        const worldPos = gridToWorld(pos.x, pos.y);
        marker.position.x = worldPos.x;
        marker.position.z = worldPos.z;
        scene.add(marker);
        SESSION.pathMeshes.push(marker);
    });
}

// --- MANEJO VISUAL DE SELECCIÓN ---
function updateSelectionVisuals() {
    // Buscar en todas las salas visitadas
    ROOMS.visitedRooms.forEach(roomId => {
        const room = ROOMS.rooms.find(r => r.id === roomId);
        if (!room) return;

        room.entities.forEach(entity => {
            if (!entity.mesh) return;

            if (entity.id === SESSION.selectedUnitId) {
                entity.mesh.material.color.setHex(0xffff00);
                entity.mesh.material.opacity = 0.5;
                entity.mesh.material.transparent = true;
            } else {
                entity.mesh.material.color.setHex(0xffffff);
                entity.mesh.material.opacity = 1.0;
            }
        });
    });
}

// --- ANIMACIÓN DE MOVIMIENTO ---
async function animateMovement() {
    if (SESSION.path.length === 0 || !SESSION.selectedUnitId) return;

    SESSION.isAnimating = true;

    // Buscar la entidad en todas las salas
    let unit = null;
    let unitRoom = null;
    for (const room of ROOMS.rooms) {
        unit = room.entities.find(e => e.id === SESSION.selectedUnitId);
        if (unit) {
            unitRoom = room;
            break;
        }
    }

    if (!unit || !unit.mesh) {
        SESSION.isAnimating = false;
        return;
    }

    const pathCopy = [...SESSION.path];

    const animateStep = (targetGridPos) => {
        return new Promise((resolve) => {
            const startPos = { x: unit.mesh.position.x, z: unit.mesh.position.z };
            const targetWorldPos = gridToWorld(targetGridPos.x, targetGridPos.y);
            const endPos = { x: targetWorldPos.x, z: targetWorldPos.z };

            const duration = 300;
            const startTime = Date.now();
            const standeeHeight = ASSETS.standees[unit.type].height;

            const hop = () => {
                const elapsed = Date.now() - startTime;
                const progress = Math.min(elapsed / duration, 1);

                const eased = progress < 0.5
                    ? 2 * progress * progress
                    : 1 - Math.pow(-2 * progress + 2, 2) / 2;

                unit.mesh.position.x = startPos.x + (endPos.x - startPos.x) * eased;
                unit.mesh.position.z = startPos.z + (endPos.z - startPos.z) * eased;

                const hopHeight = 0.8;
                const hopProgress = Math.sin(progress * Math.PI);
                unit.mesh.position.y = (standeeHeight / 2) + (hopProgress * hopHeight);

                if (progress < 1) {
                    requestAnimationFrame(hop);
                } else {
                    unit.mesh.position.x = endPos.x;
                    unit.mesh.position.z = endPos.z;
                    unit.mesh.position.y = standeeHeight / 2;
                    resolve();
                }
            };

            hop();
        });
    };

    for (let i = 0; i < pathCopy.length; i++) {
        const step = pathCopy[i];

        await animateStep(step);

        unit.x = step.x;
        unit.y = step.y;

        // 1. Verificar si hemos pisado una puerta (Para renderizar lo siguiente antes de entrar)
        checkDoorTransition(unit, unitRoom);

        // 2. AUTO-CORRECCIÓN: Verificar en qué sala estamos FÍSICAMENTE
        const actualRoom = detectRoomChange(unit, unitRoom);
        if (actualRoom) {
            unitRoom = actualRoom;
        }

        SESSION.path.shift();
        updatePathVisuals();
    }

    // Centrar cámara en el personaje manteniendo el offset de la vista actual
    const newTarget = unit.mesh.position.clone();
    newTarget.y = 0;

    const currentOffset = camera.position.clone().sub(controls.target);

    controls.target.copy(newTarget);
    camera.position.copy(newTarget).add(currentOffset);

    // Actualizar el target de la vista actual para futuras referencias
    CAMERA_VIEWS[SESSION.currentView].target = { x: newTarget.x, y: newTarget.y, z: newTarget.z };


    SESSION.selectedUnitId = null;
    updateSelectionVisuals();
    SESSION.isAnimating = false;
    drawMinimap(); // Actualizar posición final del jugador
}

// Verifica si la unidad ha entrado físicamente en una sala diferente a la registrada
function detectRoomChange(unit, currentLogicalRoom) {
    for (const room of ROOMS.rooms) {
        if (room.id === currentLogicalRoom.id) continue;

        if (isPositionInRoom(unit.x, unit.y, room)) {
            console.log(`CORRECCIÓN: Entidad detectada en sala ${room.id} (registrada en ${currentLogicalRoom.id}). Transfiriendo...`);

            // Transferir entidad lógica
            const oldIdx = currentLogicalRoom.entities.indexOf(unit);
            if (oldIdx > -1) currentLogicalRoom.entities.splice(oldIdx, 1);
            room.entities.push(unit);

            // Transferir mesh (para renderizado/borrado correcto)
            if (SESSION.roomMeshes[currentLogicalRoom.id]) {
                const meshIdx = SESSION.roomMeshes[currentLogicalRoom.id].entities.indexOf(unit.mesh);
                if (meshIdx > -1) SESSION.roomMeshes[currentLogicalRoom.id].entities.splice(meshIdx, 1);
            }
            if (SESSION.roomMeshes[room.id]) {
                SESSION.roomMeshes[room.id].entities.push(unit.mesh);
            }

            // Asegurar que la sala está visitada y renderizada (si llegamos aquí por "magia")
            if (!ROOMS.visitedRooms.has(room.id)) {
                ROOMS.visitedRooms.add(room.id);
                renderRoom(room);
            }

            ROOMS.currentRoom = room.id;
            drawMinimap();

            return room; // Devolver la nueva sala actual
        }
    }
    return null;
}

// --- VERIFICAR TRANSICIÓN DE PUERTA ---
function checkDoorTransition(unit, currentRoom) {
    for (const door of currentRoom.doors) {
        const doorGridPos = getDoorGridPosition(currentRoom, door);

        if (unit.x === doorGridPos.x && unit.y === doorGridPos.y) {
            const targetRoomId = door.leadsTo;

            // Solo nos encargamos de precargar/revelar la sala aquí
            if (!ROOMS.visitedRooms.has(targetRoomId)) {
                console.log("Puerta pisada -> Revelando sala", targetRoomId);
                ROOMS.visitedRooms.add(targetRoomId);
                const targetRoom = ROOMS.rooms.find(r => r.id === targetRoomId);
                if (targetRoom) {
                    renderRoom(targetRoom);
                    drawMinimap();
                }
            }
            break;
        }
    }
}

function getDoorGridPosition(room, door) {
    const tile = room.tile;
    const tileWidth = ASSETS.tiles[tile.type].width;
    const tileHeight = ASSETS.tiles[tile.type].height;

    switch (door.side) {
        case 'N':
            return { x: tile.x + door.gridX, y: tile.y - 1 };
        case 'S':
            return { x: tile.x + door.gridX, y: tile.y + tileHeight };
        case 'E':
            return { x: tile.x + tileWidth, y: tile.y + door.gridY };
        case 'W':
            return { x: tile.x - 1, y: tile.y + door.gridY };
    }
}

// --- CARGA Y RENDERIZADO ---
const textureLoader = new THREE.TextureLoader();

function loadTexture(path) {
    if (SESSION.textureCache[path]) {
        return Promise.resolve(SESSION.textureCache[path]);
    }

    return new Promise((resolve) => {
        textureLoader.load(path, (tex) => {
            tex.colorSpace = THREE.SRGBColorSpace;
            tex.magFilter = THREE.NearestFilter;
            tex.minFilter = THREE.NearestFilter;
            SESSION.textureCache[path] = tex;
            resolve(tex);
        });
    });
}

async function renderRoom(room) {
    console.log(">>> renderRoom ejecutado para sala:", room.id);
    if (SESSION.roomMeshes[room.id]) {
        return; // Ya renderizada
    }

    const roomMeshes = {
        tile: null,
        walls: [],
        doors: [],
        entities: []
    };

    // Renderizar tile
    const tileDef = ASSETS.tiles[room.tile.type];
    const tileTex = await loadTexture(tileDef.src);
    tileTex.wrapS = THREE.RepeatWrapping;
    tileTex.wrapT = THREE.RepeatWrapping;
    // Ajustar repetición según tamaño real de la sala para evitar estiramiento
    tileTex.repeat.set(tileDef.width / 4, tileDef.height / 4);

    const worldWidth = tileDef.width * CONFIG.CELL_SIZE;
    const worldHeight = tileDef.height * CONFIG.CELL_SIZE;

    const tileGeometry = new THREE.PlaneGeometry(worldWidth, worldHeight);
    const tileMaterial = new THREE.MeshStandardMaterial({
        map: tileTex,
        transparent: true,
        side: THREE.DoubleSide
    });
    const tileMesh = new THREE.Mesh(tileGeometry, tileMaterial);

    tileMesh.rotation.x = -Math.PI / 2;
    tileMesh.receiveShadow = true;

    const originPos = gridToWorld(room.tile.x, room.tile.y);
    tileMesh.position.x = originPos.x + (worldWidth / 2) - (CONFIG.CELL_SIZE / 2);
    tileMesh.position.z = originPos.z + (worldHeight / 2) - (CONFIG.CELL_SIZE / 2);
    tileMesh.position.y = 0;

    scene.add(tileMesh);
    roomMeshes.tile = tileMesh;

    // Renderizar paredes
    const wallTex = await loadTexture(ASSETS.tiles['wall_1'].src);
    wallTex.wrapS = THREE.RepeatWrapping;
    wallTex.wrapT = THREE.RepeatWrapping;
    // Las paredes siempre repiten en horizontal, la V es fija
    wallTex.repeat.set(2, 2);

    const wallHeight = 2.5;
    const halfSizeX = worldWidth / 2;
    const halfSizeZ = worldHeight / 2;
    const centerX = tileMesh.position.x;
    const centerZ = tileMesh.position.z;

    const wallConfigs = [
        { side: 'N', width: worldWidth, offset: { x: 0, z: -halfSizeZ }, rotation: 0 },
        { side: 'S', width: worldWidth, offset: { x: 0, z: halfSizeZ }, rotation: 0 },
        { side: 'E', width: worldHeight, offset: { x: halfSizeX, z: 0 }, rotation: Math.PI / 2 },
        { side: 'W', width: worldHeight, offset: { x: -halfSizeX, z: 0 }, rotation: Math.PI / 2 }
    ];

    for (const config of wallConfigs) {
        if (room.walls.includes(config.side)) {
            const opacity = getWallOpacity(config.side, SESSION.currentView);

            // Textura adaptada al ancho específico de esta pared
            const materialTex = wallTex.clone();
            // Ajustar repetición horizontal según longitud de la pared (aprox 1 repetición cada 2 celdas grandes)
            materialTex.repeat.set(config.width / (CONFIG.CELL_SIZE * 2), 2);

            const wallMaterial = new THREE.MeshStandardMaterial({
                map: materialTex,
                transparent: opacity < 1.0,
                opacity: opacity,
                side: THREE.DoubleSide
            });

            // Geometría específica para el ancho de ESTA pared
            const wallGeometry = new THREE.PlaneGeometry(config.width, wallHeight);

            const wall = new THREE.Mesh(wallGeometry, wallMaterial);
            wall.position.set(
                centerX + config.offset.x,
                wallHeight / 2,
                centerZ + config.offset.z
            );
            wall.rotation.y = config.rotation;
            wall.castShadow = true;
            wall.receiveShadow = true;
            wall.userData.wallSide = config.side; // Metadata para identificar el lado
            scene.add(wall);
            roomMeshes.walls.push(wall);
        }
    }

    // Renderizar puertas
    const doorTex = await loadTexture(ASSETS.tiles['door_1'].src);
    const doorWidth = 1.5;
    const doorHeight = 2.0;

    for (const door of room.doors) {
        // Verificar que la sala destino existe
        const targetRoom = ROOMS.rooms.find(r => r.id === door.leadsTo);
        if (!targetRoom) {
            console.warn(`Puerta en sala ${room.id} apunta a sala inexistente ${door.leadsTo}`);
            continue; // Saltar esta puerta
        }

        const doorGeometry = new THREE.PlaneGeometry(doorWidth, doorHeight);
        const doorMaterial = new THREE.MeshStandardMaterial({
            map: doorTex.clone(),
            transparent: true,
            alphaTest: 0.1,
            side: THREE.DoubleSide
        });

        const doorMesh = new THREE.Mesh(doorGeometry, doorMaterial);
        const doorGridPos = getDoorGridPosition(room, door);
        const doorWorldPos = gridToWorld(doorGridPos.x, doorGridPos.y);

        switch (door.side) {
            case 'N':
                doorMesh.position.set(doorWorldPos.x, doorHeight / 2, centerZ - halfSizeZ + 0.05);
                doorMesh.rotation.y = 0;
                break;
            case 'S':
                doorMesh.position.set(doorWorldPos.x, doorHeight / 2, centerZ + halfSizeZ - 0.05);
                doorMesh.rotation.y = 0;
                break;
            case 'E':
                doorMesh.position.set(centerX + halfSizeX - 0.05, doorHeight / 2, doorWorldPos.z);
                doorMesh.rotation.y = Math.PI / 2;
                break;
            case 'W':
                doorMesh.position.set(centerX - halfSizeX + 0.05, doorHeight / 2, doorWorldPos.z);
                doorMesh.rotation.y = Math.PI / 2;
                break;
        }

        scene.add(doorMesh);
        roomMeshes.doors.push(doorMesh);
    }

    // Renderizar entidades
    for (const entity of room.entities) {
        // Si la entidad ya tiene mesh (vino de otra sala), solo añadirlo al tracking
        if (entity.mesh) {
            roomMeshes.entities.push(entity.mesh);
            continue;
        }

        const standeeDef = ASSETS.standees[entity.type];
        const standeeTex = await loadTexture(standeeDef.src);

        const imgAspect = standeeTex.image.width / standeeTex.image.height;
        const height = standeeDef.height;
        const width = height * imgAspect;

        const standeeGeometry = new THREE.PlaneGeometry(width, height);
        const standeeMaterial = new THREE.MeshStandardMaterial({
            map: standeeTex,
            transparent: true,
            alphaTest: 0.5,
            side: THREE.DoubleSide
        });

        const standeeMesh = new THREE.Mesh(standeeGeometry, standeeMaterial);
        standeeMesh.castShadow = true;

        const pos = gridToWorld(entity.x, entity.y);
        standeeMesh.position.set(pos.x, height / 2, pos.z);

        scene.add(standeeMesh);
        entity.mesh = standeeMesh;
        roomMeshes.entities.push(standeeMesh);
    }

    SESSION.roomMeshes[room.id] = roomMeshes;
}

async function initWorld() {
    // Renderizar solo las salas visitadas
    for (const roomId of ROOMS.visitedRooms) {
        const room = ROOMS.rooms.find(r => r.id === roomId);
        if (room) {
            await renderRoom(room);
        }
    }
}

initWorld();

// --- COMPASS UI ---
function updateCompassUI() {
    document.querySelectorAll('.compass-btn').forEach(btn => {
        btn.classList.remove('active');
    });
    const activeBtn = document.querySelector(`[data-direction="${SESSION.currentView}"]`);
    if (activeBtn) {
        activeBtn.classList.add('active');
    }
}

// --- MINIMAP UI ---
function drawMinimap() {
    const canvas = document.getElementById('minimap');
    if (!canvas) return;
    const ctx = canvas.getContext('2d');
    const width = canvas.width;
    const height = canvas.height;

    // Limpiar canvas
    ctx.fillStyle = '#111';
    ctx.fillRect(0, 0, width, height);

    if (ROOMS.rooms.length === 0) return;

    // 1. Calcular límites del MAPA COMPLETO (Debug Mode: Ver todo)
    let minX = Infinity, maxX = -Infinity, minY = Infinity, maxY = -Infinity;

    ROOMS.rooms.forEach(room => {
        const tileDef = ASSETS.tiles[room.tile.type];
        minX = Math.min(minX, room.tile.x);
        maxX = Math.max(maxX, room.tile.x + tileDef.width);
        minY = Math.min(minY, room.tile.y);
        maxY = Math.max(maxY, room.tile.y + tileDef.height);
    });

    // Añadir margen generoso para ver bien
    const margin = 8;
    minX -= margin;
    maxX += margin;
    minY -= margin;
    maxY += margin;

    const mapWidth = maxX - minX;
    const mapHeight = maxY - minY;

    // Calcular escala para encajar TODO el mapa en el canvas
    const scaleX = width / mapWidth;
    const scaleY = height / mapHeight;
    const scale = Math.min(scaleX, scaleY);

    // Función para transformar coords de cuadrícula a canvas
    const toCanvas = (x, y) => {
        return {
            x: (x - minX) * scale + (width - mapWidth * scale) / 2,
            y: (y - minY) * scale + (height - mapHeight * scale) / 2
        };
    };

    // 2. Dibujar TODAS las Salas
    ROOMS.rooms.forEach(room => {
        const tileDef = ASSETS.tiles[room.tile.type];

        const pos = toCanvas(room.tile.x, room.tile.y);
        const w = tileDef.width * scale;
        const h = tileDef.height * scale;

        // Color base de sala
        const isVisited = ROOMS.visitedRooms.has(room.id);

        if (room.id === ROOMS.currentRoom) {
            ctx.fillStyle = '#44aadd'; // Actual: Azul
        } else if (isVisited) {
            ctx.fillStyle = '#777';    // Visitada: Gris Claro
        } else {
            ctx.fillStyle = '#333';    // No Visitada: Gris Oscuro
        }

        ctx.fillRect(pos.x, pos.y, w, h);

        // Borde
        ctx.strokeStyle = '#555';
        ctx.lineWidth = 1;
        ctx.strokeRect(pos.x, pos.y, w, h);

        // Puertas
        ctx.fillStyle = isVisited ? '#fff' : '#666'; // Puertas tenues si no visitado
        room.doors.forEach(door => {
            const doorGridPos = getDoorGridPosition(room, door);
            const dPos = toCanvas(doorGridPos.x + 0.5, doorGridPos.y + 0.5);
            ctx.beginPath();
            ctx.arc(dPos.x, dPos.y, scale * 0.4, 0, Math.PI * 2);
            ctx.fill();
        });
    });

    // 3. Dibujar Jugador
    const currentRoomObj = ROOMS.rooms.find(r => r.id === ROOMS.currentRoom);
    if (currentRoomObj) {
        const player = currentRoomObj.entities.find(e => e.type === 'hero_1');
        if (player) {
            const pPos = toCanvas(player.x + 0.5, player.y + 0.5);

            ctx.fillStyle = '#ffff00';
            ctx.beginPath();
            ctx.arc(pPos.x, pPos.y, scale * 0.8, 0, Math.PI * 2);
            ctx.fill();
        }
    }
}


// Event listeners para los botones del compás
document.querySelectorAll('.compass-btn').forEach(btn => {
    btn.addEventListener('click', () => {
        const direction = btn.getAttribute('data-direction');
        setCameraView(direction);
    });
});

// Inicializar minimapa
drawMinimap();

// --- INTERACCIÓN ---
const raycaster = new THREE.Raycaster();
const pointer = new THREE.Vector2();

window.addEventListener('pointerdown', (event) => {
    if (SESSION.isAnimating) return;

    if (event.button === 0) {
        pointer.x = (event.clientX / window.innerWidth) * 2 - 1;
        pointer.y = -(event.clientY / window.innerHeight) * 2 + 1;

        raycaster.setFromCamera(pointer, camera);

        // Detectar click en entidades
        const allEntities = [];
        ROOMS.visitedRooms.forEach(roomId => {
            const room = ROOMS.rooms.find(r => r.id === roomId);
            if (room) {
                allEntities.push(...room.entities.filter(e => e.mesh));
            }
        });

        const entityMeshes = allEntities.map(e => e.mesh);
        const intersectsEntities = raycaster.intersectObjects(entityMeshes);

        if (intersectsEntities.length > 0) {
            const clickedMesh = intersectsEntities[0].object;
            const entity = allEntities.find(e => e.mesh === clickedMesh);
            if (entity) {
                console.log("Seleccionado:", entity.type);
                SESSION.selectedUnitId = entity.id;
                SESSION.path = [];
                updatePathVisuals();
                updateSelectionVisuals();
                return;
            }
        }

        // Procesar click en suelo
        if (SESSION.selectedUnitId) {
            const intersectsGround = raycaster.intersectObject(raycastPlane);

            if (intersectsGround.length > 0) {
                const point = intersectsGround[0].point;
                const gridPos = worldToGrid(point.x, point.z);

                let prevNode;
                if (SESSION.path.length > 0) {
                    prevNode = SESSION.path[SESSION.path.length - 1];
                } else {
                    const entity = allEntities.find(e => e.id === SESSION.selectedUnitId);
                    prevNode = { x: entity.x, y: entity.y };
                }

                if (SESSION.path.length > 0) {
                    const lastNode = SESSION.path[SESSION.path.length - 1];
                    if (lastNode.x === gridPos.x && lastNode.y === gridPos.y) {
                        SESSION.path.pop();
                        updatePathVisuals();
                        return;
                    }
                }

                if (isAdjacent(prevNode, gridPos)) {
                    const alreadyInPath = SESSION.path.some(p => p.x === gridPos.x && p.y === gridPos.y);
                    const isUnitPos = (gridPos.x === prevNode.x && gridPos.y === prevNode.y && SESSION.path.length === 0);

                    // VALIDACIÓN: Solo permitir movimiento a celdas transitables
                    if (!alreadyInPath && !isUnitPos && isWalkable(gridPos.x, gridPos.y)) {
                        SESSION.path.push(gridPos);
                        updatePathVisuals();
                    }
                }
            }
        }
    }

    if (event.button === 2) {
        event.preventDefault();

        if (SESSION.selectedUnitId && SESSION.path.length > 0) {
            animateMovement();
        }
    }
});

window.addEventListener('contextmenu', (event) => {
    event.preventDefault();
});

function animate() {
    requestAnimationFrame(animate);
    controls.update();
    renderer.render(scene, camera);
}
animate();

window.addEventListener('resize', () => {
    const aspect = window.innerWidth / window.innerHeight;
    camera.left = -d * aspect;
    camera.right = d * aspect;
    camera.top = d;
    camera.bottom = -d;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
});