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

# Script Name: speak
# Description: Text-to-speech with ElevenLabs/Piper/espeak support
# Source: Enhanced from https://evanhahn.com/scripts-i-wrote-that-i-use-all-the-time/
# Usage: echo "text" | speak
#        speak < file.txt
#        cat README.md | speak

# Strip markdown if pandoc is available
if command -v pandoc &>/dev/null; then
  text=$(pandoc -f commonmark -t plain --wrap=preserve)
else
  text=$(cat)
fi

# Try voice systems in order of preference:
# 1. ElevenLabs (best quality, requires API)
# 2. Piper (good quality, local)
# 3. espeak-ng (fallback)
# 4. say (macOS)

if command -v elevenlabs &>/dev/null && [[ -n "${ELEVENLABS_API_KEY:-}" ]]; then
  # Use ElevenLabs (highest quality)
  echo "$text" | elevenlabs tts --voice "Adam" --play
elif command -v piper &>/dev/null; then
  # Use Piper (good local TTS)
  # Look for installed voice models
  piper_voice_dir="$HOME/.local/share/piper/voices"
  if [[ -f "$piper_voice_dir/en_US-amy-medium.onnx" ]]; then
    echo "$text" | piper --model "$piper_voice_dir/en_US-amy-medium.onnx" --output-raw | aplay -r 22050 -f S16_LE -t raw -
  else
    echo "Error: Piper voice model not found at $piper_voice_dir" >&2
    echo "Download with: piper --download-dir $piper_voice_dir --download en_US-amy-medium" >&2
    exit 1
  fi
elif hash espeak-ng 2>/dev/null; then
  # Use espeak-ng (basic but reliable)
  echo "$text" | espeak-ng
elif hash say 2>/dev/null; then
  # Use macOS say
  echo "$text" | say
else
  echo "Error: No TTS program found" >&2
  echo "Install one of: piper, espeak-ng, or set ELEVENLABS_API_KEY" >&2
  exit 1
fi