#!/bin/sh

mic_device="alsa_input.pci-0000_00_1f.3.analog-stereo"
system_device="alsa_output.pci-0000_00_1f.3.analog-stereo.monitor"
save_path="$HOME/Videos/rofi-recorder"
datetime=$(date +"%d.%m.%Y %H:%M:%S")
lockfile="/tmp/.rofi-recorder"

if [[ -z $lockfile ]]; then
    notify-send --hint int:transient:1 -t 1000 "Recorder" "Lockfile is present!"
    exit 1
fi

check_total_time() {
    target_prefix=$1
    mkdir -p $save_path

    ( cd $save_path &&
    for f in $target_prefix*.mkv; do 
        ffmpeg -i "$f" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d ,; 
    done | awk -F: '{ total += $1 * 3600 + $2 * 60 + $3 } END { print int(total/3600)":"int((total%3600)/60)":"int(total%60) }'
    )
}

merge_videos() {
    target_prefix=$1
    result_prefix=$2
    touch $lockfile
    mkdir -p $save_path
    
    local files=("$save_path"/$target_prefix*.mkv)
    if [[ ${#files[@]} -eq 0 ]] || [[ ! -f "${files[0]}" ]]; then
        notify-send "Error" "No MKV files found in $save_path"
        rm $lockfile
        return 1
    fi
    
    # Create output filename with timestamp
    local output_file="$save_path/$result_prefix-$datetime.mkv"
    local file_list="$save_path/$target_prefix_list.txt"
    
    # Create file list in creation order (oldest first)
    find "$save_path" -maxdepth 1 -name "*$target_prefix*.mkv" -not -name "$result_prefix*.mkv" -type f -printf "%T@ %p\n" | \
    sort -n | \
    cut -d' ' -f2- > "$file_list"
    
    # Convert file paths to ffmpeg concat format
    sed -i 's/^/file /' "$file_list"
    # Escape single quotes and wrap paths in single quotes for ffmpeg
    sed -i "s|file \(.*\)|file '\1'|" "$file_list"
    
    # Show ongoing notification
    notify-send -u low -i video-x-generic "Merging Videos" "Merging $(wc -l < "$file_list") video files..." &
    local notify_pid=$!
    
    # Merge videos using ffmpeg concat demuxer
    if ffmpeg -f concat -safe 0 -i "$file_list" -c copy "$output_file" -y 2>/dev/null; then
        # Kill the ongoing notification
        kill $notify_pid 2>/dev/null
        
        # Clean up temporary file
        rm -f "$file_list"
        
        # Remove lockfile
        rm $lockfile

        action=$(notify-send -A "Nice" -A "Delete clips" "Merge Complete" \
            "Videos merged successfully into $(basename "$output_file")")
        
        if [[ "$action" == "1" ]]; then
            # Delete all original MKV files except the merged one
            find "$save_path" -maxdepth 1 -name "$target_prefix*.mkv" -not -name "$result_prefix*.mkv" -type f -exec gio trash {} +
            notify-send --hint int:transient:1 -t 1000 "Recorder" "Stopping"
        fi
        
    else
        # Kill the ongoing notification
        kill $notify_pid 2>/dev/null
        
        # Clean up on failure
        rm -f "$file_list"
        rm -f "$output_file"
        
        notify-send -u critical "Merge Failed" "Failed to merge video files"
        return 1
    fi
}

# Check if wf-recorder is already running
if pgrep -x "wf-recorder" > /dev/null; then
    current_file=$(ps -o args= -C wf-recorder | head -n1 | grep -oE '[^ ]+\.mp4' | tail -n1)

    notify-send --hint int:transient:1 -t 1000 "Recorder" "Stopping"
    pkill -2 wf-recorder
    sleep 1
    # Force kill if still running
    pkill wf-recorder 2>/dev/null
    exit 0
fi

clips_total_duration=$(check_total_time clip)
merges_total_duration=$(check_total_time merged)

# The modes are video only, +mic, +system audio, full.
mode=$(echo -e "Video only\nMicrophone\nMerge clips" | rofi \
    -modes drun,run,calc \
    -dmenu -p "Clips duration: $clips_total_duration / Merges duration: $merges_total_duration" \
    -theme "$HOME/.config/rofi/styles/style-recorder.rasi" \
    -markup-rows \
    -drun-use-desktop-cache \
)

if [[ -z "$mode" ]]; then
    notify-send --hint int:transient:1 -t 1000 "Recorder" "Aborting"
    exit 1
fi

case "$mode" in
    "Video only")
        # Video only - no audio
        wf-recorder -c libx264rgb -r 30 -f "$save_path/clip_$datetime.mkv" &
        ;;
    "Microphone")
        # With mic only
        wf-recorder -c libx264rgb -r 30 -a "$mic_device" --audio-backend=pulse -f "$save_path/clip_$datetime.mkv" &
        ;;
    "Merge clips")
        merge_videos clip merged
        ;;
    *)
        notify-send --hint int:transient:1 -t 1000 "Recorder" "Invalid mode selected"
        exit 1
        ;;
esac

recorder_pid=$!

sleep 1
if ps -p $recorder_pid > /dev/null; then
else
    notify-send --hint int:transient:1 -t 3000 "Recorder" "Failed to start recording"
    exit 1
fi

# Wait for the recording process to finish
wait $recorder_pid

if [ $? -eq 0 ]; then
    notify-send --hint int:transient:1 -t 3000 "Recorder" "Video saved $save_path/clip_$datetime.mkv"
else
    notify-send --hint int:transient:1 -t 3000 "Recorder" "Recording failed or was interrupted"
fi