#!/usr/bin/env fish
# Run the app in web mode with recommended env vars (fish shell)
# Usage: ./run_web.fish

# create venv if missing
if not test -d venv
    python3 -m venv venv
end

# activate venv
source venv/bin/activate.fish

# ensure dependencies
pip install -r requirements.txt

# recommended env vars (adjust if needed)
set -x SNAPSHOT_INTERVAL 600           # seconds (600 = 10 minutes)
set -x BRIGHTNESS_THRESHOLD 50        # 0-255
set -x AUTO_START false                # true to auto-start monitor inside web server
# ensure CONSOLE_MODE is unset so the Flask server will run
set -e CONSOLE_MODE

# logging
set -x LOG_DIR logs
mkdir -p $LOG_DIR
set -x LOG_FILE $LOG_DIR/run_web.log
set -x PID_FILE $LOG_DIR/run_web.pid

# If a previous PID file exists, try to stop that process first
if test -f $PID_FILE
    set OLD_PID (cat $PID_FILE)
    if test -n "$OLD_PID"
        if ps -p $OLD_PID > /dev/null 2>&1
            echo "Stopping previous process pid $OLD_PID"
            kill $OLD_PID 2>/dev/null || kill -9 $OLD_PID 2>/dev/null
            sleep 1
        end
        rm -f $PID_FILE
    end
end

# Also check for any process listening on port 5000 and kill it to free the port
if type lsof >/dev/null 2>&1
    set PORT_PIDS (lsof -ti:5000 2>/dev/null)
    if test -n "$PORT_PIDS"
        echo "Killing processes on port 5000: $PORT_PIDS"
        for p in $PORT_PIDS
            kill $p 2>/dev/null || kill -9 $p 2>/dev/null
        end
    end
else
    # fallback using ss and awk if lsof not available
    if type ss >/dev/null 2>&1
        for line in (ss -ltnp 2>/dev/null | grep ':5000' | awk '{print $NF}' | sed -n 's/.*pid=\([0-9]*\).*/\1/p')
            if test -n "$line"
                echo "Killing process pid $line listening on port 5000"
                kill $line 2>/dev/null || kill -9 $line 2>/dev/null
            end
        end
    end
end

echo "Starting web app in background; logs: $LOG_FILE"
# Use bash to ensure POSIX redirection works reliably
bash -lc "python app.py > '$LOG_FILE' 2>&1 & echo \$! > '$PID_FILE'"

# wait briefly for process to start
sleep 1
if test -f $PID_FILE
    set PID (cat $PID_FILE)
    echo "Started pid: $PID"
else
    echo "Failed to start process; see $LOG_FILE for details"
end

# tail the log so the user can see live output (Ctrl+C to stop tail but process keeps running)
echo "Tailing log (press Ctrl+C to stop tail, process will continue running in background)."
tail -n 200 -f $LOG_FILE