"""ElevenLabs text-to-speech service."""

import logging
import time

_logger = logging.getLogger(__name__)

try:
    import requests as _requests
except ImportError:
    _requests = None

ELEVENLABS_BASE = "https://api.elevenlabs.io/v1"

DEFAULT_VOICES = {
    "female_british": "21m00Tcm4TlvDq8ikWAM",  # Rachel
    "male_british": "VR6AewLTigWG4xSOukaG",     # Arnold
    "female_american": "EXAVITQu4vr4xnSDxMaL",  # Bella
    "male_american": "TxGEqnHWrfWFTfGW9XjX",    # Josh
}


class ElevenLabsService:
    """ElevenLabs TTS — higher quality multilingual voices."""

    def __init__(self, env):
        self.env = env
        self._get_param = env["ir.config_parameter"].sudo().get_param

    def _get_key(self):
        key = self._get_param("encoach_ai.elevenlabs_api_key", "")
        if not key:
            import os
            key = os.environ.get("ELEVENLABS_API_KEY", "")
        if not key:
            raise RuntimeError("ElevenLabs API key not configured — set in AI Settings")
        return key

    def _log(self, action, latency, status="success", error=None):
        try:
            self.env["encoach.ai.log"].sudo().create({
                "service": "elevenlabs",
                "action": action,
                "latency_ms": latency,
                "status": status,
                "error_message": error,
            })
        except Exception:
            pass

    def synthesize(self, text, *, voice_id=None, voice_key="female_british",
                   model=None, output_format="mp3_44100_128"):
        """Convert text to speech using ElevenLabs.

        Returns:
            dict with 'audio' (bytes), 'content_type', 'voice_id', 'characters'
        """
        if not _requests:
            raise RuntimeError("requests package not installed")
        key = self._get_key()
        voice_id = voice_id or DEFAULT_VOICES.get(voice_key, list(DEFAULT_VOICES.values())[0])
        model = model or self._get_param("encoach_ai.elevenlabs_model", "eleven_multilingual_v2")

        url = f"{ELEVENLABS_BASE}/text-to-speech/{voice_id}"
        t0 = time.time()
        try:
            resp = _requests.post(
                url,
                json={
                    "text": text,
                    "model_id": model,
                    "voice_settings": {"stability": 0.5, "similarity_boost": 0.75},
                },
                headers={"xi-api-key": key, "Accept": "audio/mpeg"},
                params={"output_format": output_format},
                timeout=60,
            )
            resp.raise_for_status()
            latency = int((time.time() - t0) * 1000)
            self._log("synthesize", latency)
            return {
                "audio": resp.content,
                "content_type": "audio/mpeg",
                "voice_id": voice_id,
                "characters": len(text),
            }
        except Exception as exc:
            self._log("synthesize", int((time.time() - t0) * 1000), "error", str(exc))
            raise

    def list_voices(self):
        """List available ElevenLabs voices."""
        key = self._get_key()
        resp = _requests.get(
            f"{ELEVENLABS_BASE}/voices",
            headers={"xi-api-key": key},
            timeout=15,
        )
        resp.raise_for_status()
        return [
            {"voice_id": v["voice_id"], "name": v["name"], "labels": v.get("labels", {})}
            for v in resp.json().get("voices", [])
        ]