#!/usr/bin/env bash

set -u

output_directory="progressive_ts_output"
package_name="deckers.thibault.aves.debug"
remote_directory="cache/fmp4_progressive_ts_test"

rm -rf "$output_directory"
mkdir -p "$output_directory"

echo "Attendo l'installazione del package..."

while ! adb shell pm path "$package_name" >/dev/null 2>&1; do
  sleep 1
done

echo "Package disponibile."
echo "Attendo la playlist completa..."

while true; do
  if ! adb shell run-as "$package_name" \
    test -s "$remote_directory/master.m3u8" \
    >/dev/null 2>&1
  then
    sleep 1
    continue
  fi

  playlist=$(
    adb exec-out run-as "$package_name" \
      cat "$remote_directory/master.m3u8" \
      2>/dev/null
  )

  if ! printf '%s\n' "$playlist" |
    grep -qF '#EXT-X-ENDLIST'
  then
    echo "Playlist presente ma non ancora completa..."
    sleep 1
    continue
  fi

  echo "Playlist completa trovata, avvio copia..."

  copy_failed=0

  for name in \
    master.m3u8 \
    segment_00000.ts \
    segment_00001.ts \
    segment_00002.ts \
    segment_00003.ts \
    segment_00004.ts
  do
    temporary="$output_directory/$name.tmp"
    final="$output_directory/$name"

    rm -f "$temporary" "$final"

    if ! adb exec-out run-as "$package_name" \
      cat "$remote_directory/$name" \
      >"$temporary" 2>/dev/null
    then
      echo "Copia ADB fallita: $name"
      rm -f "$temporary"
      copy_failed=1
      continue
    fi

    bytes=$(wc -c <"$temporary" | tr -d ' ')

    if [ "$name" = "master.m3u8" ]; then
      minimum_bytes=100
    else
      minimum_bytes=1000000
    fi

    if [ "$bytes" -lt "$minimum_bytes" ]; then
      echo "File non valido: $name, $bytes byte"
      rm -f "$temporary"
      copy_failed=1
      continue
    fi

    mv "$temporary" "$final"
    echo "Copiato $name: $bytes byte"
  done

  if [ "$copy_failed" -eq 0 ]; then
    echo
    echo "Tutti i file sono stati copiati:"
    ls -lh "$output_directory"
    exit 0
  fi

  echo "Copia incompleta, nuovo tentativo..."
  sleep 1
done