// Monster-KI

const Monster = {
    col: 0,
    row: 0,
    targetCol: 0,
    targetRow: 0,
    visualX: 0,
    visualY: 0,
    speed: 3,           // Aktuelle Geschwindigkeit (Tiles/Sek)
    baseSpeed: 3,
    maxSpeed: 5,
    speedIncrease: 0.15, // Zunahme pro Sekunde
    moving: false,
    moveProgress: 0,
    path: [],
    pathRecalcTimer: 0,
    pathRecalcInterval: 0.3, // Pfad alle 0.3s neu berechnen
    animFrame: 0,
    animTimer: 0,

    init(col, row, baseSpeed, speedIncrease, maxSpeed) {
        this.col = col;
        this.row = row;
        this.targetCol = col;
        this.targetRow = row;
        this.visualX = col;
        this.visualY = row;
        this.speed = baseSpeed;
        this.baseSpeed = baseSpeed;
        this.maxSpeed = maxSpeed;
        this.speedIncrease = speedIncrease;
        this.moving = false;
        this.moveProgress = 0;
        this.path = [];
        this.pathRecalcTimer = 0;
        this.animFrame = 0;
    },

    recalcPath(grid, playerCol, playerRow) {
        this.path = Utils.bfs(grid, this.col, this.row, playerCol, playerRow);
    },

    update(dt, grid, playerCol, playerRow, elapsedTime) {
        // Geschwindigkeit erhöhen
        this.speed = Math.min(
            this.baseSpeed + this.speedIncrease * elapsedTime,
            this.maxSpeed
        );

        // Animation
        this.animTimer += dt;
        if (this.animTimer > 0.2) {
            this.animFrame = (this.animFrame + 1) % 2;
            this.animTimer = 0;
        }

        // Pfad regelmäßig neu berechnen
        this.pathRecalcTimer += dt;
        if (this.pathRecalcTimer >= this.pathRecalcInterval) {
            this.pathRecalcTimer = 0;
            this.recalcPath(grid, playerCol, playerRow);
        }

        // Bewegung
        if (!this.moving && this.path.length > 0) {
            const next = this.path.shift();
            this.targetCol = next.col;
            this.targetRow = next.row;
            this.moving = true;
            this.moveProgress = 0;
        }

        if (this.moving) {
            this.moveProgress += this.speed * dt;

            if (this.moveProgress >= 1) {
                this.col = this.targetCol;
                this.row = this.targetRow;
                this.moving = false;
                this.moveProgress = 0;

                // Direkt nächsten Schritt
                if (this.path.length > 0) {
                    const next = this.path.shift();
                    this.targetCol = next.col;
                    this.targetRow = next.row;
                    this.moving = true;
                    this.moveProgress = 0;
                }
            }
        }

        // Visuelle Position
        if (this.moving) {
            this.visualX = Utils.lerp(this.col, this.targetCol, this.moveProgress);
            this.visualY = Utils.lerp(this.row, this.targetRow, this.moveProgress);
        } else {
            this.visualX = this.col;
            this.visualY = this.row;
        }
    },

    // Kollision mit Spieler (Distanz-basiert)
    checkCollision(playerX, playerY) {
        const dx = this.visualX - playerX;
        const dy = this.visualY - playerY;
        return Math.sqrt(dx * dx + dy * dy) < 0.6;
    },

    draw(time) {
        Renderer.drawMonster(this.visualX, this.visualY, this.animFrame, time);
    }
};