#!/bin/bash
# Collects system stats hourly - run via cron every hour
# Data stored in ~/.local/share/health-monitor/

DATA_DIR="$HOME/.local/share/health-monitor"
TODAY=$(date +%Y-%m-%d)
DATA_FILE="$DATA_DIR/stats-$TODAY.csv"

mkdir -p "$DATA_DIR"

# Initialize CSV header if new file
if [ ! -f "$DATA_FILE" ]; then
    echo "timestamp,cpu,mem,load1,load5,load15,disk_pct" > "$DATA_FILE"
fi

# CPU usage (1 second sample)
CPU=$(top -bn2 -d0.5 | grep "Cpu(s)" | tail -1 | awk '{printf "%.1f", 100 - $8}')

# Memory percentage
MEM=$(free | awk '/Mem:/ {printf "%.1f", $3/$2 * 100}')

# Load averages
read LOAD1 LOAD5 LOAD15 _ < /proc/loadavg

# Disk usage
DISK=$(df / | awk 'NR==2 {gsub(/%/,""); print $5}')

# Timestamp
TS=$(date +%H:%M)

echo "$TS,$CPU,$MEM,$LOAD1,$LOAD5,$LOAD15,$DISK" >> "$DATA_FILE"

# Cleanup old files (keep 7 days)
find "$DATA_DIR" -name "stats-*.csv" -mtime +7 -delete 2>/dev/null