// native-bridge.js — Detects if running inside Capacitor native app
// and provides native API access (camera for barcode, push notifications, haptics)

(function() {
    'use strict';

    window.NexusNative = {
        isNative: typeof Capacitor !== 'undefined',
        _scanStream: null,
        _scanVideo: null,

        // Camera barcode scanning — works in native (Capacitor) and web (BarcodeDetector / getUserMedia)
        async scanBarcode() {
            // Native Capacitor path
            if (this.isNative) {
                try {
                    const { Camera } = await import('@capacitor/camera');
                    const photo = await Camera.getPhoto({
                        quality: 90,
                        resultType: 'base64'
                    });
                    return photo;
                } catch(e) {
                    return null;
                }
            }

            // Web path: use BarcodeDetector API (Chrome 83+)
            if (!('BarcodeDetector' in window)) {
                alert('Tu navegador no soporta escaneo de codigos de barras. Usa Chrome 83+ o un dispositivo movil.');
                return null;
            }

            return new Promise(async (resolve) => {
                try {
                    const stream = await navigator.mediaDevices.getUserMedia({
                        video: { facingMode: 'environment', width: { ideal: 1280 }, height: { ideal: 720 } }
                    });
                    this._scanStream = stream;

                    // Create overlay UI
                    const overlay = document.createElement('div');
                    overlay.id = 'barcode-scan-overlay';
                    overlay.style.cssText = 'position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.9);z-index:99999;display:flex;flex-direction:column;align-items:center;justify-content:center;';

                    const video = document.createElement('video');
                    video.autoplay = true;
                    video.playsInline = true;
                    video.style.cssText = 'width:90%;max-width:500px;border-radius:12px;border:3px solid #F5A623;';
                    video.srcObject = stream;
                    this._scanVideo = video;

                    const label = document.createElement('p');
                    label.textContent = 'Apunta al codigo de barras...';
                    label.style.cssText = 'color:#fff;font-size:16px;margin-top:16px;font-family:sans-serif;';

                    const cancelBtn = document.createElement('button');
                    cancelBtn.textContent = 'Cancelar';
                    cancelBtn.style.cssText = 'margin-top:16px;padding:10px 24px;background:#F5A623;color:#000;border:none;border-radius:6px;font-size:15px;cursor:pointer;font-weight:bold;';
                    cancelBtn.onclick = () => {
                        this.stopScan();
                        overlay.remove();
                        resolve(null);
                    };

                    overlay.appendChild(video);
                    overlay.appendChild(label);
                    overlay.appendChild(cancelBtn);
                    document.body.appendChild(overlay);

                    const detector = new BarcodeDetector({
                        formats: ['ean_13', 'ean_8', 'code_128', 'code_39', 'qr_code', 'upc_a', 'upc_e']
                    });

                    const scanFrame = async () => {
                        if (!this._scanStream) return;
                        try {
                            const barcodes = await detector.detect(video);
                            if (barcodes.length > 0) {
                                const code = barcodes[0].rawValue;
                                label.textContent = 'Codigo detectado: ' + code;
                                label.style.color = '#4CAF50';
                                // Small delay so user sees the result
                                setTimeout(() => {
                                    this.stopScan();
                                    overlay.remove();
                                    resolve(code);
                                }, 400);
                                return;
                            }
                        } catch(e) { /* frame failed, retry */ }
                        requestAnimationFrame(scanFrame);
                    };

                    // Wait for video to be ready
                    video.onloadedmetadata = () => {
                        video.play();
                        requestAnimationFrame(scanFrame);
                    };

                } catch(e) {
                    console.error('Camera access error:', e);
                    alert('No se pudo acceder a la camara: ' + e.message);
                    resolve(null);
                }
            });
        },

        stopScan() {
            if (this._scanStream) {
                this._scanStream.getTracks().forEach(t => t.stop());
                this._scanStream = null;
            }
            this._scanVideo = null;
            var overlay = document.getElementById('barcode-scan-overlay');
            if (overlay) overlay.remove();
        },

        // Push notification registration
        async registerPush() {
            if (!this.isNative) return null;
            try {
                const { PushNotifications } = await import('@capacitor/push-notifications');
                const result = await PushNotifications.requestPermissions();
                if (result.receive === 'granted') {
                    await PushNotifications.register();
                }
                PushNotifications.addListener('registration', token => {
                    console.log('Push token:', token.value);
                });
                PushNotifications.addListener('pushNotificationReceived', notification => {
                    console.log('Push received:', notification);
                });
            } catch(e) {
                console.log('Push not available:', e);
            }
        },

        // Haptic feedback
        async vibrate() {
            if (!this.isNative) return;
            try {
                const { Haptics, ImpactStyle } = await import('@capacitor/haptics');
                await Haptics.impact({ style: ImpactStyle.Light });
            } catch(e) {}
        },

        // Status bar (hide for fullscreen POS)
        async setupStatusBar() {
            if (!this.isNative) return;
            try {
                const { StatusBar, Style } = await import('@capacitor/status-bar');
                await StatusBar.setStyle({ style: Style.Dark });
                await StatusBar.setBackgroundColor({ color: '#0d0d0d' });
            } catch(e) {}
        }
    };

    // Auto-init if native
    if (window.NexusNative.isNative) {
        window.NexusNative.setupStatusBar();
        window.NexusNative.registerPush();
    }
})();