#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
RECORDINGS_DIR="$SCRIPT_DIR/recordings"
mkdir -p "$RECORDINGS_DIR"

OUTPUT="$RECORDINGS_DIR/call_$(date +%Y%m%d_%H%M%S).mp3"

# Argument parsing
SHOW_INPUTS=false
for arg in "$@"; do
  [[ "$arg" == "--show-inputs" ]] && SHOW_INPUTS=true
done

# Detect the default audio sink via PipeWire metadata
DEFAULT_SINK=$(pw-metadata 0 2>/dev/null \
  | awk -F"'" '/default\.audio\.sink/ { print $4 }' \
  | grep -o '"name":"[^"]*"' \
  | cut -d'"' -f4)

if [[ -z "$DEFAULT_SINK" ]]; then
  echo "ERROR: Could not detect default audio sink." >&2
  echo "Run ./list-sources.sh to see available devices." >&2
  exit 1
fi

MONITOR_SOURCE="${DEFAULT_SINK}.monitor"

# --- show-inputs mode ---
if $SHOW_INPUTS; then
  BAR_WIDTH=30
  DB_MIN=-60
  DB_MAX=0

  render_bar() {
    local label="$1"
    local db="$2"
    local bar=""
    local filled=0

    if [[ -n "$db" ]]; then
      # Clamp to range
      local clamped
      clamped=$(awk -v v="$db" -v lo="$DB_MIN" -v hi="$DB_MAX" \
        'BEGIN { if (v < lo) v=lo; if (v > hi) v=hi; print v }')
      filled=$(awk -v v="$clamped" -v lo="$DB_MIN" -v hi="$DB_MAX" -v w="$BAR_WIDTH" \
        'BEGIN { printf "%d", (v - lo) / (hi - lo) * w }')
    fi

    local empty=$(( BAR_WIDTH - filled ))

    # Color based on level
    local color="\033[32m"  # green
    if [[ -n "$db" ]]; then
      color=$(awk -v v="$db" 'BEGIN {
        if (v >= -3)  { print "\033[31m" }
        else if (v >= -12) { print "\033[33m" }
        else { print "\033[32m" }
      }')
    fi

    bar="${color}"
    local i
    for (( i=0; i<filled; i++ )); do bar+="█"; done
    for (( i=0; i<empty;  i++ )); do bar+="░"; done
    bar+="\033[0m"

    local db_str="${db:-  ---}"
    printf "  %-13s: [%b] %6s dB\n" "$label" "$bar" "$db_str"
  }

  echo "=========================================="
  echo "  Input Monitor  (Ctrl+C to exit)"
  echo "=========================================="
  echo ""

  TMP_MIC=$(mktemp)
  TMP_SYS=$(mktemp)

  ffmpeg -loglevel info -f pulse -i default \
    -af ebur128 -f null - 2>"$TMP_MIC" &
  PID_MIC=$!

  ffmpeg -loglevel info -f pulse -i "$MONITOR_SOURCE" \
    -af ebur128 -f null - 2>"$TMP_SYS" &
  PID_SYS=$!

  cleanup() {
    kill "$PID_MIC" "$PID_SYS" 2>/dev/null || true
    rm -f "$TMP_MIC" "$TMP_SYS"
    tput cnorm
    echo ""
    exit 0
  }
  trap cleanup INT TERM

  tput civis  # hide cursor

  # Reserve two lines
  printf "\n\n"

  while true; do
    MIC_DB=$(grep -oP 'M:\s*\K[-0-9.]+' "$TMP_MIC" 2>/dev/null | tail -1 || true)
    SYS_DB=$(grep -oP 'M:\s*\K[-0-9.]+' "$TMP_SYS" 2>/dev/null | tail -1 || true)

    printf "\033[2A"  # move up 2 lines
    render_bar "Mikrofon" "$MIC_DB"
    render_bar "System Audio" "$SYS_DB"

    sleep 0.1
  done
fi

# --- Recording mode ---
echo "=========================================="
echo "  Call Recorder"
echo "=========================================="
echo "  Microphone  : default"
echo "  System audio: $MONITOR_SOURCE"
echo "  Output file : $OUTPUT"
echo "------------------------------------------"
echo "  Press Ctrl+C to stop recording."
echo "=========================================="
echo ""

ffmpeg -loglevel warning \
  -f pulse -i default \
  -f pulse -i "$MONITOR_SOURCE" \
  -filter_complex "amix=inputs=2:duration=longest:normalize=0" \
  -c:a libmp3lame -b:a 128k \
  "$OUTPUT"

echo ""
echo "Recording saved to: $OUTPUT"