#!/usr/bin/env python3
from flask import Flask, request, Response
import requests
import base64
import uuid
import time

app = Flask(__name__)
GROQ_BASE = "https://api.groq.com"

CORS = {
    "Access-Control-Allow-Origin": "*",
    "Access-Control-Allow-Methods": "GET, POST, OPTIONS",
    "Access-Control-Allow-Headers": "Authorization, Content-Type",
}

# Чанковая сборка аудио (DPI bypass — каждый POST <10KB)
_sessions = {}  # session_id -> {chunks, mime, total, token, expires}

@app.route("/<path:path>", methods=["OPTIONS"])
def options(path):
    return Response(status=204, headers=CORS)

@app.route("/v1/transcribe", methods=["POST", "OPTIONS"])
def transcribe_chunked():
    if request.method == "OPTIONS":
        return Response(status=204, headers=CORS)

    data = request.get_json(force=True) or {}
    idx = data.get("idx", 0)
    total = data.get("total", 1)
    chunk = data.get("chunk", "")
    mime = data.get("mime", "audio/webm")
    token = data.get("token", "")
    sid = data.get("sid", "")

    # Очистка старых сессий
    now = time.time()
    for k in list(_sessions.keys()):
        if _sessions[k]["expires"] < now:
            del _sessions[k]

    if not sid:
        sid = uuid.uuid4().hex[:12]
        _sessions[sid] = {"chunks": {}, "mime": mime, "total": total, "token": token, "expires": now + 120}
    else:
        s = _sessions.get(sid)
        if not s:
            return Response('{"error":"session not found"}', status=404, headers=CORS, content_type="application/json")

    _sessions[sid]["chunks"][idx] = chunk
    _sessions[sid]["expires"] = now + 120

    if len(_sessions[sid]["chunks"]) >= total:
        s = _sessions.pop(sid)
        audio_b64 = "".join(s["chunks"][i] for i in sorted(s["chunks"]))
        audio_data = base64.b64decode(audio_b64)

        ext = "webm"
        if "ogg" in s["mime"]: ext = "ogg"
        elif "mp4" in s["mime"] or "aac" in s["mime"]: ext = "mp4"
        elif "wav" in s["mime"]: ext = "wav"

        boundary = "----ChunkedBoundary" + uuid.uuid4().hex[:16]
        payload = b"".join([
            f'--{boundary}\r\nContent-Disposition: form-data; name="file"; filename="audio.{ext}"\r\nContent-Type: {s["mime"]}\r\n\r\n'.encode(),
            audio_data,
            f'\r\n--{boundary}\r\nContent-Disposition: form-data; name="model"\r\n\r\nwhisper-large-v3'.encode(),
            f'\r\n--{boundary}\r\nContent-Disposition: form-data; name="language"\r\n\r\nit'.encode(),
            f'\r\n--{boundary}--\r\n'.encode(),
        ])

        r = requests.post(f"{GROQ_BASE}/openai/v1/audio/transcriptions",
            headers={"Authorization": f"Bearer {s['token']}", "Content-Type": f"multipart/form-data; boundary={boundary}"},
            data=payload, timeout=60)
        result = r.json()
        out = dict(CORS)
        out["Content-Type"] = "application/json"
        return Response(r.text, status=r.status_code, headers=out)
    else:
        return Response(f'{{"ok":true,"sid":"{sid}"}}', status=200, headers=CORS, content_type="application/json")

@app.route("/<path:subpath>", methods=["GET", "POST", "PUT", "DELETE", "PATCH"])
def proxy(subpath):
    url = f"{GROQ_BASE}/{subpath}"
    hdrs = {}
    if request.headers.get("Authorization"):
        hdrs["Authorization"] = request.headers["Authorization"]
    if request.headers.get("Content-Type"):
        hdrs["Content-Type"] = request.headers["Content-Type"]
    r = requests.request(request.method, url, headers=hdrs,
                         data=request.get_data(), timeout=60, stream=True)
    out = dict(CORS)
    out["Content-Type"] = r.headers.get("Content-Type", "application/json")
    return Response(r.iter_content(8192), status=r.status_code, headers=out)

if __name__ == "__main__":
    app.run(host="127.0.0.1", port=8765)