sudo cp -r encoder/* /var/www/encoder/
sudo cp -r html/* /var/www/html/
sudo cp attempts.json /var/www/attempts.json
DEVICE_ID="$(sudo cat /sys/class/dmi/id/product_uuid | tr -d '\n')"
sudo sed -i 's/certificatecertificatecertificatecertificate/'$DEVICE_ID'/g' /var/www/html/certification.html

cat > /etc/apache2/sites-available/000-default.conf << 'EOL'
<VirtualHost *:8080>
    ServerName localhost
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/encoder

    ErrorLog ${APACHE_LOG_DIR}/encoder-error.log
    CustomLog ${APACHE_LOG_DIR}/encoder-access.log combined

    SSLEngine on
    SSLCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem
    SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key

    <Directory /var/www/encoder>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>
EOL

cat>/etc/apache2/ports.conf<< 'EOL'
<IfModule mod_ssl.c>
    Listen 8080
</IfModule>
EOL


SOURCE_FILE="users.json"
TARGET_FILE="/var/www/users.json"

if [ ! -f "$TARGET_FILE" ]; then
    cp "$SOURCE_FILE" "$TARGET_FILE"
fi

SOURCE_FILE="users.json"
TARGET_FILE="/var/www/users.json"

if [ ! -f "$TARGET_FILE" ]; then
    cp "$SOURCE_FILE" "$TARGET_FILE"
fi


cat > /etc/systemd/system/encoder-rtmp0.service<< 'EOL'
[Unit]
Description= RTMP Encoder by ShreeBhattJi

[Service]
ExecStart=/bin/bash /var/www/encoder-rtmp0.sh
WorkingDirectory=/var/www/
Restart=always
User=root
Environment=PATH=/usr/bin:/usr/local/bin
RestartSec=30

[Install]
WantedBy=multi-user.target
EOL

cat > /etc/systemd/system/encoder-rtmp1.service<< 'EOL'
[Unit]
Description= RTMP Encoder by ShreeBhattJi

[Service]
ExecStart=/bin/bash /var/www/encoder-rtmp1.sh
WorkingDirectory=/var/www/
Restart=always
User=root
Environment=PATH=/usr/bin:/usr/local/bin
RestartSec=30

[Install]
WantedBy=multi-user.target
EOL

sudo mkdir -p /etc/systemd/system/nginx.service.d

sudo cat > /etc/systemd/system/nginx.service.d/override.conf << 'EOF'
[Service]
Restart=always
RestartSec=30
EOF

cat > /etc/systemd/system/encoder-rtmp0.service<< 'EOL'
[Unit]
Description= RTMP Encoder by ShreeBhattJi

[Service]
ExecStart=/bin/bash /var/www/encoder-rtmp0.sh
WorkingDirectory=/var/www/
Restart=always
User=root
Environment=PATH=/usr/bin:/usr/local/bin
RestartSec=30

[Install]
WantedBy=multi-user.target
EOL

cat > /etc/systemd/system/encoder-rtmp1.service<< 'EOL'
[Unit]
Description= RTMP Encoder by ShreeBhattJi

[Service]
ExecStart=/bin/bash /var/www/encoder-rtmp1.sh
WorkingDirectory=/var/www/
Restart=always
User=root
Environment=PATH=/usr/bin:/usr/local/bin
RestartSec=30

[Install]
WantedBy=multi-user.target
EOL

sudo cp default_nginx_site /var/www/default_nginx_site
sudo cp default_nginx.conf /var/www/default_nginx.conf

sudo systemctl unmask systemd-networkd-wait-online.service
sudo systemctl enable systemd-networkd-wait-online.service
sudo systemctl daemon-reload
sudo systemctl restart nginx

sudo a2enmod ssl
sudo a2ensite 000-default

sudo chown -R www-data:www-data /var/www/*

FSTAB="/etc/fstab"
TMPFS_LINE="tmpfs  /mnt/ramdisk  tmpfs  size=1536M,mode=0755  0  0"

BIND_LINES=(
"/mnt/ramdisk/hls       /var/www/html/hls       none  bind  0  0"
"/mnt/ramdisk/dash      /var/www/html/dash      none  bind  0  0"
"/mnt/ramdisk/scramble  /var/www/html/scramble  none  bind  0  0"
)

# Ensure directories exist
mkdir -p /mnt/ramdisk/{hls,dash,scramble} /var/www/{hls,dash,scramble}

# Check if tmpfs is mounted
if ! mountpoint -q /mnt/ramdisk; then
  echo "tmpfs not mounted. Mounting now..."
  mount -t tmpfs -o size=1536M,mode=0755 tmpfs /mnt/ramdisk
fi

# Ensure bind mounts are active
for d in hls dash scramble; do
  if ! mountpoint -q "/var/www/$d"; then
    echo "Bind mount /var/www/$d not active. Mounting..."
    mount --bind "/mnt/ramdisk/$d" "/var/www/$d"
  fi
done

# Backup fstab once
if [ ! -f /etc/fstab.bak_ramdisk ]; then
  cp "$FSTAB" /etc/fstab.bak_ramdisk
fi

# Add tmpfs entry if missing
grep -qF "$TMPFS_LINE" "$FSTAB" || echo "$TMPFS_LINE" >> "$FSTAB"

# Add bind entries if missing
for line in "${BIND_LINES[@]}"; do
  grep -qF "$line" "$FSTAB" || echo "$line" >> "$FSTAB"
done

# Validate
mount -a

cat > /usr/local/bin/nginx_system_monitor_sampler.py<< 'EOL'
#!/usr/bin/env python3
import time
import json
import os
import subprocess
import threading
import re  # Built-in, no installation needed
from collections import deque
from datetime import datetime, timezone
import psutil

# ---------------- CONFIGURATION ----------------

OUT_FILE = "/var/www/encoder/metrics.json"
TMP_FILE = OUT_FILE + ".tmp"
SAMPLE_INTERVAL = 10.0
HISTORY_SECONDS = 15 * 60
MAX_SAMPLES = int(HISTORY_SECONDS / SAMPLE_INTERVAL)

# ---------------- HISTORY BUFFERS ----------------

timestamps = deque(maxlen=MAX_SAMPLES)
cpu_hist = deque(maxlen=MAX_SAMPLES)
ram_hist = deque(maxlen=MAX_SAMPLES)

gpu_total_hist = deque(maxlen=MAX_SAMPLES)
gpu_render_hist = deque(maxlen=MAX_SAMPLES)
gpu_video_hist = deque(maxlen=MAX_SAMPLES)
gpu_blitter_hist = deque(maxlen=MAX_SAMPLES)
gpu_ve_hist = deque(maxlen=MAX_SAMPLES)

net_in_hist = deque(maxlen=MAX_SAMPLES)
net_out_hist = deque(maxlen=MAX_SAMPLES)
disk_read_hist = deque(maxlen=MAX_SAMPLES)
disk_write_hist = deque(maxlen=MAX_SAMPLES)
disk_percent_hist = deque(maxlen=MAX_SAMPLES)

_prev_net = psutil.net_io_counters()
_prev_disk = psutil.disk_io_counters()
_prev_time = time.time()

# ---------------- SHARED GPU DATA ----------------

gpu_data = {
    "total": 0.0,
    "Render/3D": 0.0,
    "Video": 0.0,
    "Blitter": 0.0,
    "VideoEnhance": 0.0
}
gpu_lock = threading.Lock()

# ---------------- GPU MONITOR THREAD ----------------

def gpu_monitor():
    global gpu_data
    # Use -s 1000 for 1-second updates
    cmd = ["/usr/sbin/intel_gpu_top", "-J", "-s", "1000"]
    
    while True:
        try:
            p = subprocess.Popen(
                cmd,
                stdout=subprocess.PIPE,
                stderr=subprocess.DEVNULL,
                text=True,
                bufsize=1
            )

            buffer = ""
            for line in p.stdout:
                buffer += line
                if "}" in line:
                    # Regex extracts the object between curly braces that contains "engines"
                    matches = re.findall(r'({[^{}]*("engines")[^{}]*})', buffer, re.DOTALL)
                    if matches:
                        try:
                            # Parse the most recent complete match
                            raw_json = matches[-1][0]
                            data = json.loads(raw_json)
                            
                            if "engines" in data:
                                eng = data["engines"]
                                
                                # Helper to find keys regardless of index (e.g. Render/3D/0)
                                def get_busy(name):
                                    for k, v in eng.items():
                                        if name in k:
                                            return v.get("busy", 0.0)
                                    return 0.0

                                with gpu_lock:
                                    gpu_data["Render/3D"] = get_busy("Render/3D")
                                    gpu_data["Video"] = get_busy("Video")
                                    gpu_data["Blitter"] = get_busy("Blitter")
                                    gpu_data["VideoEnhance"] = get_busy("VideoEnhance")
                                    
                                    # Total is the peak engine usage
                                    vals = [v for k, v in gpu_data.items() if k != "total"]
                                    gpu_data["total"] = max(vals) if vals else 0.0
                            
                            # Clean buffer to prevent memory growth
                            buffer = buffer[buffer.rfind("}")+1:]
                        except (json.JSONDecodeError, ValueError):
                            continue
        except Exception:
            time.sleep(2)

threading.Thread(target=gpu_monitor, daemon=True).start()

# ---------------- SAMPLING ----------------

def sample_once():
    global _prev_net, _prev_disk, _prev_time

    now = time.time()
    iso = datetime.fromtimestamp(now).isoformat(timespec='seconds')

    cpu = psutil.cpu_percent(interval=None)
    ram = psutil.virtual_memory().percent

    with gpu_lock:
        gtot = gpu_data["total"]
        gr = gpu_data["Render/3D"]
        gv = gpu_data["Video"]
        gb = gpu_data["Blitter"]
        ge = gpu_data["VideoEnhance"]

    net = psutil.net_io_counters()
    disk = psutil.disk_io_counters()

    try:
        disk_percent = psutil.disk_usage("/").percent
    except:
        disk_percent = 0.0

    elapsed = now - _prev_time if _prev_time > 0 else SAMPLE_INTERVAL
    if elapsed <= 0: elapsed = SAMPLE_INTERVAL

    in_rate = (net.bytes_recv - _prev_net.bytes_recv) / elapsed
    out_rate = (net.bytes_sent - _prev_net.bytes_sent) / elapsed
    read_rate = (disk.read_bytes - _prev_disk.read_bytes) / elapsed
    write_rate = (disk.write_bytes - _prev_disk.write_bytes) / elapsed

    timestamps.append(iso)
    cpu_hist.append(round(cpu, 2))
    ram_hist.append(round(ram, 2))

    gpu_total_hist.append(round(gtot, 2))
    gpu_render_hist.append(round(gr, 2))
    gpu_video_hist.append(round(gv, 2))
    gpu_blitter_hist.append(round(gb, 2))
    gpu_ve_hist.append(round(ge, 2))

    net_in_hist.append(int(max(0, in_rate)))
    net_out_hist.append(int(max(0, out_rate)))
    disk_read_hist.append(int(max(0, read_rate)))
    disk_write_hist.append(int(max(0, write_rate)))
    disk_percent_hist.append(round(disk_percent, 2))

    _prev_net, _prev_disk, _prev_time = net, disk, now

# ---------------- WRITE JSON ----------------

def write_json_atomic():
    payload = {
        "timestamps": list(timestamps),
        "cpu_percent": list(cpu_hist),
        "ram_percent": list(ram_hist),
        "gpu_total": list(gpu_total_hist),
        "gpu_render": list(gpu_render_hist),
        "gpu_video": list(gpu_video_hist),
        "gpu_blitter": list(gpu_blitter_hist),
        "gpu_videoenhance": list(gpu_ve_hist),
        "net_in_Bps": list(net_in_hist),
        "net_out_Bps": list(net_out_hist),
        "disk_read_Bps": list(disk_read_hist),
        "disk_write_Bps": list(disk_write_hist),
        "disk_percent": list(disk_percent_hist),
        "sample_interval": SAMPLE_INTERVAL,
        "generated_at": datetime.now(timezone.utc).isoformat(timespec='seconds').replace("+00:00", "Z")
    }

    with open(TMP_FILE, "w") as f:
        json.dump(payload, f)
    os.replace(TMP_FILE, OUT_FILE)

# ---------------- MAIN LOOP ----------------

def main():
    global _prev_net, _prev_disk, _prev_time
    _prev_net = psutil.net_io_counters()
    _prev_disk = psutil.disk_io_counters()
    _prev_time = time.time()

    while True:
        try:
            sample_once()
            write_json_atomic()
        except Exception as e:
            pass # Keep service running silently
        time.sleep(SAMPLE_INTERVAL)

if __name__ == "__main__":
    main()
    
EOL

sudo systemctl enable --now system-monitor.service
sudo systemctl restart system-monitor.service --no-pager