/**
 * TwinBondSystem.js
 * 
 * Sistem, ki občasno pošlje srhljiv telepatski signal (spomin/klic) od Ane.
 * Ekran naključno utripne vijolično in se izpiše skrit tekst v glavi Kaja.
 */

export default class TwinBondSystem {
    constructor(scene) {
        this.scene = scene;
        this.isActive = false;

        // Overlay za vijoličen blisk
        this.flashOverlay = scene.add.graphics()
            .setDepth(9999)
            .setScrollFactor(0);

        // Tekst na sredini zaslona
        const cx = scene.cameras.main.width / 2;
        const cy = scene.cameras.main.height / 2;

        this.messageText = scene.add.text(cx, cy - 100, '', {
            fontFamily: 'Courier New',
            fontSize: '42px',
            color: '#ff99ff',
            stroke: '#2b002b',
            strokeThickness: 8,
            align: 'center',
            fontStyle: 'bold'
        })
            .setOrigin(0.5, 0.5)
            .setDepth(10000)
            .setScrollFactor(0)
            .setAlpha(0);

        // Nabor Aninih sporočil
        this.messages = [
            "K a i . . .  n a j d i  m e . . .",
            "T u k a j  d o l  j e  t e m a . . .",
            "N e  o b u p a j . . .  T w i n  B o n d  d e l u j e .",
            "K a i . . .  b o l i  m e . . .",
            "P a z i  s e  n o č i . . ."
        ];

        // Tipka za testiranje (tipka T)
        this.keyT = scene.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.T);
    }

    update(time, delta) {
        // Testni sprožilec
        if (Phaser.Input.Keyboard.JustDown(this.keyT) && !this.isActive) {
            this.triggerBond();
        }

        // Naključno sprožanje (zelo majhna možnost ob igranju)
        // 1 na 10,000 frejmov (~ vsake 3-5 minut)
        if (Math.random() < 0.0001 && !this.isActive) {
            // Samo če je zunaj spanja
            this.triggerBond();
        }
    }

    triggerBond() {
        this.isActive = true;
        
        // Oddaj event za AccessibilityManager (za Deaf Mode Purple HUD glow)
        if (this.scene.game) {
            this.scene.game.events.emit('twinBondPulse');
        }

        // Zaustavi Kaja za kratek čas (šok)
        if (this.scene.kai) {
            this.scene.kai.canMove = false;
            this.scene.kai.setVelocity(0, 0);
        }

        // 1. Zvok (Web Audio API srhljiv glitch freq)
        this._playGlitchSound();

        // 2. Narisemo purple flash, ki pokrije zaslon
        const W = this.scene.cameras.main.width;
        const H = this.scene.cameras.main.height;
        this.flashOverlay.clear();
        
        let alpha = this.scene.accessState?.autismMode ? 0.2 : 0.85; // Omehčan za avtizem
        this.flashOverlay.fillStyle(0x3a0055, alpha); // Temno vijolična
        this.flashOverlay.fillRect(0, 0, W, H);

        // Skrijemo čez 0.15s
        this.scene.time.delayedCall(150, () => {
            this.flashOverlay.clear();
        });

        // 3. Izberi random text in naredi typewriter
        const text = Phaser.Utils.Array.GetRandom(this.messages);
        this.messageText.setText('');
        this.messageText.setAlpha(1);

        let index = 0;
        const typeTimer = this.scene.time.addEvent({
            delay: 80,
            repeat: text.length - 1,
            callback: () => {
                this.messageText.setText(text.substring(0, index + 1));
                index++;
            }
        });

        // 4. Fade out text in enable movement po 3 sekundah
        this.scene.time.delayedCall(3000, () => {
            this.scene.tweens.add({
                targets: this.messageText,
                alpha: 0,
                duration: 1000,
                onComplete: () => {
                    this.isActive = false;
                    if (this.scene.kai) {
                        this.scene.kai.canMove = true;
                    }
                }
            });
        });
    }

    _playGlitchSound() {
        if (!this.scene.sound.context) return;
        const ctx = this.scene.sound.context;
        const osc = ctx.createOscillator();
        const gain = ctx.createGain();

        // Srhljiv nizek zvok s frekvenčno modulacijo
        osc.type = 'sawtooth';
        osc.frequency.setValueAtTime(120, ctx.currentTime);
        osc.frequency.linearRampToValueAtTime(40, ctx.currentTime + 1.5);

        gain.gain.setValueAtTime(0.3, ctx.currentTime);
        gain.gain.exponentialRampToValueAtTime(0.01, ctx.currentTime + 1.5);

        osc.connect(gain);
        gain.connect(ctx.destination);
        osc.start();
        osc.stop(ctx.currentTime + 1.5);
    }
}