import { SliderControl, TextInputControl, DropdownControl } from './Control.js';

export class Node {
    constructor(x, y) {
        this.x = x;
        this.y = y;
        this.width = 180;

        this.headerHeight = 6;
        this.padding = 12;

        this.isHovered = false;
        this.isSelected = false;
        this.isDragging = false;

        this.offsetX = 0;
        this.offsetY = 0;

        this.hasInput = true;
        this.hasOutput = true;
        this.input = { x: 0, y: 0 };
        this.output = { x: 0, y: 0 };
        this.hoveredPort = null; // "input", "output", or null
        this.canDelete = true;

        this.controls = []
        this.addControl(new SliderControl(this.padding, 0, this.width - this.padding * 2, 38, "Volume", 0, 4095, 1));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "text", "Text", ""));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "Float", ""));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "int", "int", ""));
        this.addControl(new DropdownControl(this.padding, 0, this.width - this.padding * 2, 38, "Mode", ["Auto", "Manual", "Disabled"], "Auto"));

    }

    get height() {
        if (this.controls.length === 0) {
            return this.headerHeight + this.padding * 2;
        }

        const bottom = Math.max(
            ...this.controls
                .filter(c => !c.hidden)
                .map(c => c.offsetY + c.height)
        );

        return bottom + this.padding;
    }

    updatePorts() {
        this.input.x = this.x - 5;
        this.input.y = this.y + this.height / 2;
        this.output.x = this.x + this.width + 5;
        this.output.y = this.y + this.height / 2;
    }


    draw(ctx) {
        const radius = 8;

        ctx.fillStyle = "#444";
        ctx.strokeStyle = "#aaa";
        ctx.lineWidth = 1;
        const inset = ctx.lineWidth / 2;

        if (this.isHovered) ctx.fillStyle = "#555";
        if (this.isSelected) ctx.strokeStyle = "#0af";
        if (this.isDragging) ctx.fillStyle = "#666";


        ctx.beginPath();
        ctx.roundRect(this.x + inset, this.y + inset, this.width - ctx.lineWidth, this.height - ctx.lineWidth, radius);
        ctx.fill();
        ctx.stroke();

        // Draw header label
        //this.drawLabel(ctx, "Node");

        // Draw controls
        for (const control of this.controls) {
            if (!control.hidden) {
                control.draw(ctx, this.x, this.y);
            }
        }
        for (const control of this.controls) {
            if (!control.hidden) {
                control.drawLate(ctx, this.x, this.y);
            }
        }


        this.updatePorts();

        if (this.hasInput) {
            ctx.beginPath();
            const r = this.hoveredPort === "input" ? 8 : 6;
            ctx.arc(this.input.x, this.input.y, r, 0, Math.PI * 2);
            ctx.fillStyle = "#888";
            ctx.fill();
        }

        if (this.hasOutput) {
            ctx.beginPath();
            const r = this.hoveredPort === "output" ? 8 : 6;
            ctx.arc(this.output.x, this.output.y, r, 0, Math.PI * 2);
            ctx.fillStyle = "#888";
            ctx.fill();
        }
    }

    drawLabel(ctx, label) {
        ctx.fillStyle = "#fff";
        ctx.font = "13px sans-serif";
        ctx.textBaseline = "middle";
        ctx.fillText(label, this.x + this.padding, this.y + 16);
    }


    contains(mx, my) {
        return mx > this.x && mx < this.x + this.width &&
            my > this.y && my < this.y + this.height;
    }

    onHover(state) {
        this.isHovered = state;
    }

    onSelect(state) {
        this.isSelected = state;
    }

    onDrag(state) {
        this.isDragging = state;
    }

    onMouseMove(mx, my) {
        // Check if mouse is near input or output
        this.hoveredPort = null;

        if (this.hasInput) {
            const dx = mx - this.input.x;
            const dy = my - this.input.y;
            if (dx * dx + dy * dy < 64) {
                this.hoveredPort = "input";
                return;
            }
        }

        if (this.hasOutput) {
            const dx = mx - this.output.x;
            const dy = my - this.output.y;
            if (dx * dx + dy * dy < 64) {
                this.hoveredPort = "output";
            }
        }
    }



    addControl(control) {
        const lastBottom = this.controls.length > 0
            ? Math.max(...this.controls.filter(c => !c.hidden).map(c => c.offsetY + c.height))
            : this.headerHeight + this.padding;

        control.offsetY = lastBottom + this.padding;
        this.controls.push(control);
    }
}

export class ServoNode extends Node {
    constructor(x, y, motorID) {
        super(x, y);

        this.hasInput = true;
        this.hasOutput = false;
        this.canDelete = false;
        this.controls = [];
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "int", "ID", motorID, true));
    }

    draw(ctx) {
        super.draw(ctx);
        super.drawLabel(ctx, "Servo Output");
    }
}

export class CurveNode extends Node {
    constructor(x, y, motorID) {
        super(x, y);

        this.hasInput = false;
        this.hasOutput = true;
        this.canDelete = false;
        this.controls = [];
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "int", "ID", motorID, true));
    }

    draw(ctx) {
        super.draw(ctx);
        super.drawLabel(ctx, "Animation Curve");
    }
}

export class VariableNode extends Node {
    constructor(x, y) {
        super(x, y);

        this.hasInput = false;
        this.hasOutput = true;
        this.controls = [];
        this.addControl(new DropdownControl(this.padding, 0, this.width - this.padding * 2, 38, "Variable", ["faceDetectX", "faceDetectY", "sine", "analogRead()", "servo"], "faceDetectX"));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "int", "arg", 0, false));

    }

    draw(ctx) {
        super.draw(ctx);
        super.drawLabel(ctx, "Variable Source");

        if (this.controls[0].getValue() == 3 || this.controls[0].getValue() == 4) {
            this.controls[1].hidden = false;
        } else {
            this.controls[1].hidden = true;
        }
    }
}

export class MathNode extends Node {
    constructor(x, y) {
        super(x, y);

        this.hasInput = true;
        this.hasOutput = true;
        this.controls = [];
        this.addControl(new DropdownControl(this.padding, 0, this.width - this.padding * 2, 38, "Operator", ["*", "/", "+", "-"], "*"));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "arg", 0, false));

    }

    draw(ctx) {
        super.draw(ctx);
        super.drawLabel(ctx, "Math Operator");
    }
}

export class MapNode extends Node {
    constructor(x, y) {
        super(x, y);

        this.hasInput = true;
        this.hasOutput = true;
        this.controls = [];
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "Input Min", 0, false));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "Input Max", 0, false));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "Output Min", 0, false));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "Output Max", 0, false));

    }

    draw(ctx) {
        super.draw(ctx);
        super.drawLabel(ctx, "Map Value");
    }
}


export class NoiseNode extends Node {
    constructor(x, y) {
        super(x, y);

        this.hasInput = false;
        this.hasOutput = true;
        this.controls = [];
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "float", "Frequency", 0.5, false));
        this.addControl(new TextInputControl(this.padding, 0, this.width - this.padding * 2, 38, "int", "Seed", 0, false));


    }

    get height() {
        const baseHeight = super.height;
        const previewHeight = 60;
        return baseHeight + previewHeight + this.padding * 2;
    }



    draw(ctx) {
        super.draw(ctx);
        super.drawLabel(ctx, "Noise");

        const freq = Math.max(0.01, parseFloat(this.controls[0].getValue()) || 0);
        const seed = parseFloat(this.controls[1].getValue()) || 0;

        const steps = 256;
        const previewHeight = 60;
        const previewWidth = this.width - this.padding * 2;
        const startX = this.x + this.padding;
        const startY = this.y + this.height - previewHeight - this.padding;

        ctx.fillStyle = "#f0f0f0"; // light gray background
        ctx.strokeStyle = "#ccc";  // optional border
        ctx.lineWidth = 1;
        ctx.beginPath();
        ctx.roundRect(
            startX - this.padding / 2,
            startY - this.padding / 2,
            previewWidth + this.padding,
            previewHeight + this.padding,
            6
        );
        ctx.fill();
        ctx.stroke();

        ctx.beginPath();
        for (let i = 0; i < steps; i++) {
            const t = i / steps * freq * 10;
            const noise = perlin1D_octave(seed, t);
            const x = startX + (i / steps) * previewWidth;
            const y = startY + previewHeight / 2 - noise * (previewHeight / 2);
            i === 0 ? ctx.moveTo(x, y) : ctx.lineTo(x, y);
        }
        ctx.strokeStyle = "#444";
        ctx.stroke();
    }
}




const fade = t => t * t * t * (t * (t * 6 - 15) + 10);
const lerp = (a, b, t) => a + t * (b - a);

function grad(hash, x) {
    const h = hash & 15;
    let grad = 1 + (h & 7); // 1 to 8
    if (h & 8) grad = -grad;
    return (grad * x) / 4;
    //return (hash & 1 ? -1 : 1) * x;
}


const perlinCache = new Map();

function perlin1D_octave(seed, x, octaves = 2, persistence = 0.5) {
    let total = 0;
    let amplitude = 1;
    let frequency = 1;
    let maxValue = 0;

    for (let i = 0; i < octaves; i++) {
        total += perlin1D(seed, x * frequency) * amplitude;
        maxValue += amplitude;
        amplitude *= persistence;
        frequency *= 2;
    }

    return total / maxValue;
}

function perlin1D(seed, x) {
    let seedCache = perlinCache.get(seed);
    if (!seedCache) {
        seedCache = new Map();
        perlinCache.set(seed, seedCache);
    }

    const key = Math.round(x * 1000) / 1000;  // round to reduce precision noise
    if (seedCache.has(key)) {
        return seedCache.get(key);
    }

    const perm = generatePermutation(seed);
    const xi = Math.floor(x) & 255;
    const xf = x - Math.floor(x);
    const u = fade(xf);

    const a = perm[xi];
    const b = perm[xi + 1];

    const result = lerp(grad(a, xf), grad(b, xf - 1), u);
    seedCache.set(key, result);
    return result;
}

function generatePermutation(seed) {
    const perm = new Array(512);
    const p = new Array(256);
    let s = seed;
    for (let i = 0; i < 256; i++) {
        s = (s * 1664525 + 1013904223) % 4294967296;
        p[i] = i;
    }
    for (let i = 255; i > 0; i--) {
        const j = s % (i + 1);
        [p[i], p[j]] = [p[j], p[i]];
        s = (s * 1664525 + 1013904223) % 4294967296;
    }
    for (let i = 0; i < 512; i++) {
        perm[i] = p[i & 255];
    }
    return perm;
}