// Sound effects system using Web Audio API - no external files needed
const SoundManager = {
    _ctx: null,
    _enabled: true,
    _volume: 0.3,

    init() {
        try {
            this._ctx = new (window.AudioContext || window.webkitAudioContext)();
        } catch (e) {
            console.warn('Web Audio API not supported');
            this._enabled = false;
        }
        const saved = localStorage.getItem('sound_enabled');
        if (saved !== null) this._enabled = saved === 'true';
    },

    setEnabled(on) {
        this._enabled = on;
        localStorage.setItem('sound_enabled', on);
    },

    toggle() {
        this.setEnabled(!this._enabled);
        return this._enabled;
    },

    _play(freq, duration, type = 'sine', volume = 1) {
        if (!this._enabled || !this._ctx) return;
        if (this._ctx.state === 'suspended') this._ctx.resume();

        const osc = this._ctx.createOscillator();
        const gain = this._ctx.createGain();
        osc.type = type;
        osc.frequency.setValueAtTime(freq, this._ctx.currentTime);
        gain.gain.setValueAtTime(this._volume * volume, this._ctx.currentTime);
        gain.gain.exponentialRampToValueAtTime(0.001, this._ctx.currentTime + duration);
        osc.connect(gain);
        gain.connect(this._ctx.destination);
        osc.start();
        osc.stop(this._ctx.currentTime + duration);
    },

    _noise(duration, volume = 1) {
        if (!this._enabled || !this._ctx) return;
        if (this._ctx.state === 'suspended') this._ctx.resume();

        const bufferSize = this._ctx.sampleRate * duration;
        const buffer = this._ctx.createBuffer(1, bufferSize, this._ctx.sampleRate);
        const data = buffer.getChannelData(0);
        for (let i = 0; i < bufferSize; i++) {
            data[i] = Math.random() * 2 - 1;
        }
        const source = this._ctx.createBufferSource();
        source.buffer = buffer;
        const gain = this._ctx.createGain();
        gain.gain.setValueAtTime(this._volume * volume, this._ctx.currentTime);
        gain.gain.exponentialRampToValueAtTime(0.001, this._ctx.currentTime + duration);
        source.connect(gain);
        gain.connect(this._ctx.destination);
        source.start();
    },

    caseOpen() {
        // Descending sweep with click
        this._play(800, 0.1, 'square', 0.3);
        setTimeout(() => this._play(400, 0.15, 'sawtooth', 0.2), 80);
        setTimeout(() => this._play(200, 0.2, 'sine', 0.15), 180);
        this._noise(0.05, 0.4);
    },

    caseRare() {
        // Ascending bright chime for rare items
        this._play(523, 0.15, 'sine', 0.3);
        setTimeout(() => this._play(659, 0.15, 'sine', 0.3), 100);
        setTimeout(() => this._play(784, 0.15, 'sine', 0.3), 200);
        setTimeout(() => this._play(1047, 0.3, 'sine', 0.4), 300);
    },

    caseCovert() {
        // Epic sound for covert/knife
        this._play(392, 0.2, 'sawtooth', 0.3);
        setTimeout(() => this._play(523, 0.2, 'sawtooth', 0.3), 150);
        setTimeout(() => this._play(659, 0.2, 'sawtooth', 0.3), 300);
        setTimeout(() => this._play(784, 0.4, 'sine', 0.5), 450);
        setTimeout(() => this._play(1047, 0.6, 'sine', 0.6), 600);
    },

    slotSpin() {
        // Ratcheting sound for slot reels
        for (let i = 0; i < 8; i++) {
            setTimeout(() => {
                this._play(300 + Math.random() * 400, 0.05, 'square', 0.15);
            }, i * 80);
        }
    },

    slotMatch() {
        // Win jingle
        this._play(523, 0.1, 'sine', 0.3);
        setTimeout(() => this._play(659, 0.1, 'sine', 0.3), 100);
        setTimeout(() => this._play(784, 0.1, 'sine', 0.3), 200);
        setTimeout(() => this._play(1047, 0.4, 'sine', 0.5), 300);
    },

    contractSubmit() {
        // Mechanical sound
        this._play(150, 0.3, 'sawtooth', 0.2);
        setTimeout(() => this._play(200, 0.2, 'square', 0.2), 200);
        setTimeout(() => this._play(250, 0.1, 'square', 0.15), 350);
    },

    contractResult() {
        // Rising success
        this._play(400, 0.15, 'sine', 0.3);
        setTimeout(() => this._play(600, 0.15, 'sine', 0.3), 120);
        setTimeout(() => this._play(800, 0.3, 'sine', 0.4), 240);
    },

    wheelSpin() {
        // Ticking as wheel rotates
        this._play(200, 0.03, 'square', 0.1);
    },

    wheelWin() {
        // Celebration
        this._play(523, 0.15, 'sine', 0.3);
        setTimeout(() => this._play(659, 0.15, 'sine', 0.3), 120);
        setTimeout(() => this._play(784, 0.2, 'sine', 0.35), 240);
        setTimeout(() => this._play(1047, 0.5, 'sine', 0.5), 360);
    },

    wheelLose() {
        // Sad trombone
        this._play(400, 0.2, 'sine', 0.2);
        setTimeout(() => this._play(350, 0.2, 'sine', 0.2), 150);
        setTimeout(() => this._play(300, 0.3, 'sine', 0.15), 300);
    },

    achievement() {
        // Achievement unlock
        this._play(659, 0.1, 'sine', 0.3);
        setTimeout(() => this._play(523, 0.1, 'sine', 0.3), 100);
        setTimeout(() => this._play(784, 0.1, 'sine', 0.3), 200);
        setTimeout(() => this._play(659, 0.1, 'sine', 0.3), 300);
        setTimeout(() => this._play(1047, 0.4, 'sine', 0.5), 400);
    },

    crashBet() {
        this._play(300, 0.1, 'square', 0.15);
    },

    crashTick() {
        this._play(500 + Math.random() * 500, 0.03, 'sine', 0.08);
    },

    crashCrashed() {
        // Explosion
        this._noise(0.3, 0.6);
        this._play(80, 0.5, 'sawtooth', 0.4);
        setTimeout(() => this._play(50, 0.8, 'sine', 0.3), 100);
    },

    crashCashout() {
        // Cashout success
        this._play(600, 0.1, 'sine', 0.3);
        setTimeout(() => this._play(800, 0.1, 'sine', 0.3), 80);
        setTimeout(() => this._play(1000, 0.2, 'sine', 0.4), 160);
    },

    click() {
        this._play(800, 0.03, 'sine', 0.1);
    },

    error() {
        this._play(200, 0.15, 'square', 0.2);
    },

    balanceUpdate() {
        this._play(1000, 0.05, 'sine', 0.1);
    }
};

// Auto-init
document.addEventListener('DOMContentLoaded', () => SoundManager.init());