// ============================================
// CONSTANTS
// ============================================
const TILE_WIDTH = 64;
const TILE_HEIGHT = 32;
const TILE_DEPTH = 16;

// ============================================
// HAPTIC FEEDBACK
// ============================================
function triggerHaptic() {
    if ('vibrate' in navigator) {
        navigator.vibrate(10);
    }
}

// ============================================
// THEME HANDLER
// ============================================
function applyTheme(theme) {
    const body = document.body;

    if (theme.background.image) {
        body.style.backgroundImage = `url(${theme.background.image})`;
    }

    body.style.backgroundSize = theme.background.style || 'cover';
    body.style.backgroundPosition = 'center';
    body.style.backgroundRepeat = 'no-repeat';
    body.style.backgroundAttachment = 'fixed';

    const root = document.documentElement;
    Object.entries(theme.colors).forEach(([key, value]) => {
        const cssVar = `--${key.replace(/([A-Z])/g, '-$1').toLowerCase()}`;
        root.style.setProperty(cssVar, value);
    });

    console.log('🎨 Theme applied:', theme.name);
}

// ============================================
// TILE RENDERER
// ============================================
function isoToScreen(gridX, gridY) {
    return {
        x: (gridX - gridY) * (TILE_WIDTH / 2) + window.innerWidth / 2,
        y: (gridX + gridY) * (TILE_HEIGHT / 2) + 100
    };
}

function createTile(tileData, theme) {
    const graphics = new PIXI.Graphics();
    const pos = isoToScreen(tileData.x, tileData.y);

    const colors = {
        top: parseInt(theme.colors.tileTop.replace('#', '0x')),
        side: parseInt(theme.colors.tileSide.replace('#', '0x')),
        grid: parseInt(theme.colors.gridColor.replace('#', '0x')),
        highlight: parseInt(theme.colors.tileHighlight.replace('#', '0x')),
        gridHighlight: parseInt(theme.colors.gridHighlight.replace('#', '0x'))
    };

    function drawNormalTile() {
        graphics.clear();
        graphics.beginFill(colors.top);
        graphics.lineStyle(1, colors.grid);
        graphics.moveTo(pos.x, pos.y);
        graphics.lineTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT);
        graphics.lineTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y);
        graphics.endFill();

        graphics.beginFill(colors.side);
        graphics.lineStyle(1, colors.grid);
        graphics.moveTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT + TILE_DEPTH);
        graphics.lineTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2 + TILE_DEPTH);
        graphics.lineTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.endFill();

        graphics.beginFill(colors.side);
        graphics.lineStyle(1, colors.grid);
        graphics.moveTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT + TILE_DEPTH);
        graphics.lineTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2 + TILE_DEPTH);
        graphics.lineTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.endFill();
    }

    function drawHighlightTile() {
        graphics.clear();
        graphics.beginFill(colors.highlight);
        graphics.lineStyle(2, colors.gridHighlight);
        graphics.moveTo(pos.x, pos.y);
        graphics.lineTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT);
        graphics.lineTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y);
        graphics.endFill();

        graphics.beginFill(colors.side);
        graphics.lineStyle(1, colors.gridHighlight);
        graphics.moveTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT + TILE_DEPTH);
        graphics.lineTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2 + TILE_DEPTH);
        graphics.lineTo(pos.x - TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.endFill();

        graphics.beginFill(colors.side);
        graphics.lineStyle(1, colors.gridHighlight);
        graphics.moveTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT);
        graphics.lineTo(pos.x, pos.y + TILE_HEIGHT + TILE_DEPTH);
        graphics.lineTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2 + TILE_DEPTH);
        graphics.lineTo(pos.x + TILE_WIDTH / 2, pos.y + TILE_HEIGHT / 2);
        graphics.endFill();
    }

    drawNormalTile();

    graphics.interactive = true;
    graphics.buttonMode = true;
    graphics.gridX = tileData.x;
    graphics.gridY = tileData.y;

    graphics.on('pointerover', () => {
        drawHighlightTile();
    });

    graphics.on('pointerout', () => {
        drawNormalTile();
    });

    return graphics;
}

function createPet(gridX, gridY, name = 'PET') {
    const container = new PIXI.Container();
    const pos = isoToScreen(gridX, gridY);

    const body = new PIXI.Graphics();
    body.beginFill(0xff6b9d);
    body.drawCircle(0, -30, 15);
    body.endFill();

    body.beginFill(0xffffff);
    body.drawCircle(-5, -32, 4);
    body.drawCircle(5, -32, 4);
    body.endFill();

    body.beginFill(0x000000);
    body.drawCircle(-5, -32, 2);
    body.drawCircle(5, -32, 2);
    body.endFill();

    const nameText = new PIXI.Text(name, {
        fontFamily: 'Courier New',
        fontSize: 12,
        fill: '#ffffff',
        stroke: '#000000',
        strokeThickness: 2
    });
    nameText.anchor.set(0.5);
    nameText.y = -50;

    container.addChild(body);
    container.addChild(nameText);
    container.x = pos.x;
    container.y = pos.y;
    container.gridX = gridX;
    container.gridY = gridY;

    return container;
}

// ============================================
// GAME CLASS
// ============================================
class Game {
    constructor() {
        this.worldId = '';
        this.theme = null;
        this.world = null;
        this.app = null;
        this.pet = null;
        this.otherPlayers = new Map();
        this.isMoving = false;
        this.dialogue = null;
        this.keys = {};

        // Use global singleton 🌍
        this.api = window.netNaviAPI;
        this.worldActions = null;

        this.playerInfo = {
            name: 'Guest',
            apiUrl: this.api.baseUrl
        };
    }

    async init() {
        try {
            // Join world with callbacks 🌍
            this.worldActions = this.api.joinWorld(this.worldId, {
                onWorldLoaded: (data) => {
                    this.world = data.world;
                    this.theme = data.theme;
                    applyTheme(this.theme);
                    this.initializeRenderer();
                },

                onCurrentPlayers: (players) => {
                    players.forEach(player => {
                        if (player.socketId !== this.api.worldSocket.id) {
                            this.addOtherPlayer(player);
                        }
                    });
                },

                onPlayerJoined: (player) => {
                    this.addOtherPlayer(player);
                },

                onPlayerMoved: (data) => {
                    const sprite = this.otherPlayers.get(data.socketId);
                    if (sprite) {
                        this.moveOtherPlayer(sprite, data.x, data.y);
                    }
                },

                onPlayerLeft: (data) => {
                    const sprite = this.otherPlayers.get(data.socketId);
                    if (sprite) {
                        this.app.stage.removeChild(sprite);
                        this.otherPlayers.delete(data.socketId);
                    }
                },

                onError: (error) => {
                    console.error('❌ World error:', error);
                }
            });

            console.log('✨ Game initializing...');
        } catch (error) {
            console.error('❌ Failed to initialize game:', error);
        }
    }

    addOtherPlayer(player) {
        const sprite = createPet(player.x, player.y, player.name);
        sprite.alpha = 0.7;
        this.otherPlayers.set(player.socketId, sprite);
        this.app.stage.addChild(sprite);
    }

    moveOtherPlayer(sprite, targetX, targetY) {
        const targetPos = isoToScreen(targetX, targetY);

        const startX = sprite.x;
        const startY = sprite.y;
        let progress = 0;

        const animate = () => {
            progress += 0.08;
            if (progress >= 1) {
                sprite.x = targetPos.x;
                sprite.y = targetPos.y;
                sprite.gridX = targetX;
                sprite.gridY = targetY;
                return;
            }

            sprite.x = startX + (targetPos.x - startX) * progress;
            sprite.y = startY + (targetPos.y - startY) * progress;

            requestAnimationFrame(animate);
        };

        animate();
    }

    initializeRenderer() {
        this.app = new PIXI.Application({
            width: window.innerWidth,
            height: window.innerHeight,
            backgroundAlpha: 0,
            antialias: true,
            resolution: window.devicePixelRatio || 1,
            autoDensity: true
        });
        document.getElementById('game').appendChild(this.app.view);

        const tiles = new PIXI.Container();
        this.app.stage.addChild(tiles);

        this.world.tiles.forEach(tileData => {
            const tile = createTile(tileData, this.theme);
            tile.on('pointerdown', () => this.movePetTo(tile.gridX, tile.gridY));
            tiles.addChild(tile);
        });

        this.pet = createPet(this.world.pet.startX, this.world.pet.startY, this.playerInfo.name);
        this.app.stage.addChild(this.pet);

        this.dialogue = document.getElementById('llm');

        this.setupInput();
        this.app.ticker.add(() => this.gameLoop());
    }

    movePetTo(targetX, targetY) {
        if (this.isMoving ||
            targetX < 0 || targetX >= this.world.gridSize ||
            targetY < 0 || targetY >= this.world.gridSize) return;

        this.isMoving = true;
        const targetPos = isoToScreen(targetX, targetY);

        const startX = this.pet.x;
        const startY = this.pet.y;
        let progress = 0;

        const animate = () => {
            progress += 0.08;
            if (progress >= 1) {
                this.pet.x = targetPos.x;
                this.pet.y = targetPos.y;
                this.pet.gridX = targetX;
                this.pet.gridY = targetY;
                this.isMoving = false;

                // Use API action to send move 📤
                if (this.worldActions) {
                    this.worldActions.move(targetX, targetY);
                }
                return;
            }

            this.pet.x = startX + (targetPos.x - startX) * progress;
            this.pet.y = startY + (targetPos.y - startY) * progress;

            requestAnimationFrame(animate);
        };

        animate();
    }

    setupInput() {
        window.addEventListener('keydown', (e) => {
            if (this.dialogue.isOpen) return;

            this.keys[e.key.toLowerCase()] = true;

            if (!this.isMoving) {
                let newX = this.pet.gridX;
                let newY = this.pet.gridY;

                if (this.keys['w'] || this.keys['arrowup']) {
                    newY--;
                } else if (this.keys['s'] || this.keys['arrowdown']) {
                    newY++;
                } else if (this.keys['a'] || this.keys['arrowleft']) {
                    newX--;
                } else if (this.keys['d'] || this.keys['arrowright']) {
                    newX++;
                }

                this.movePetTo(newX, newY);
            }
        });

        window.addEventListener('keyup', (e) => {
            this.keys[e.key.toLowerCase()] = false;
        });
    }

    gameLoop() {
        if (!this.isMoving && this.pet) {
            this.pet.children[0].y = -30 + Math.sin(Date.now() / 300) * 2;
        }
    }
}

// ============================================
// START GAME
// ============================================
const urlParams = new URLSearchParams(window.location.search);
const worldId = urlParams.get('world');

const game = new Game();
game.worldId = worldId;
game.init();