"""Server sync client for multi-user transcription."""

import requests
import json
from typing import Optional
from datetime import datetime
import threading
import queue


class ServerSyncClient:
    """Client for syncing transcriptions to a PHP server."""

    def __init__(self, url: str, room: str, passphrase: str, user_name: str):
        """
        Initialize server sync client.

        Args:
            url: Server URL (e.g., http://example.com/transcription/server.php)
            room: Room name
            passphrase: Room passphrase
            user_name: User's display name
        """
        self.url = url
        self.room = room
        self.passphrase = passphrase
        self.user_name = user_name

        # Queue for sending transcriptions asynchronously
        self.send_queue = queue.Queue()
        self.is_running = False
        self.send_thread: Optional[threading.Thread] = None

        # Statistics
        self.sent_count = 0
        self.error_count = 0
        self.last_error: Optional[str] = None

    def start(self):
        """Start the sync client."""
        if self.is_running:
            return

        self.is_running = True
        self.send_thread = threading.Thread(target=self._send_loop, daemon=True)
        self.send_thread.start()
        print(f"Server sync started: room={self.room}")

    def stop(self):
        """Stop the sync client."""
        self.is_running = False
        if self.send_thread:
            self.send_thread.join(timeout=2.0)
        print("Server sync stopped")

    def send_transcription(self, text: str, timestamp: Optional[datetime] = None):
        """
        Send a transcription to the server (non-blocking).

        Args:
            text: Transcription text
            timestamp: Timestamp (defaults to now)
        """
        if timestamp is None:
            timestamp = datetime.now()

        # Add to queue
        self.send_queue.put({
            'text': text,
            'timestamp': timestamp.strftime("%H:%M:%S")
        })

    def _send_loop(self):
        """Background thread for sending transcriptions."""
        while self.is_running:
            try:
                # Get transcription from queue (with timeout)
                try:
                    trans_data = self.send_queue.get(timeout=1.0)
                except queue.Empty:
                    continue

                # Send to server
                self._send_to_server(trans_data)

            except Exception as e:
                print(f"Error in server sync send loop: {e}")
                self.error_count += 1
                self.last_error = str(e)

    def _send_to_server(self, trans_data: dict):
        """
        Send a transcription to the PHP server.

        Args:
            trans_data: Dictionary with 'text' and 'timestamp'
        """
        try:
            # Prepare payload
            payload = {
                'room': self.room,
                'passphrase': self.passphrase,
                'user_name': self.user_name,
                'text': trans_data['text'],
                'timestamp': trans_data['timestamp']
            }

            # Send POST request
            response = requests.post(
                self.url,
                params={'action': 'send'},
                json=payload,
                timeout=5.0
            )

            # Check response
            if response.status_code == 200:
                self.sent_count += 1
                self.last_error = None
            else:
                error_msg = f"Server returned {response.status_code}"
                try:
                    error_data = response.json()
                    if 'error' in error_data:
                        error_msg = error_data['error']
                except:
                    pass

                print(f"Server sync error: {error_msg}")
                self.error_count += 1
                self.last_error = error_msg

        except requests.exceptions.Timeout:
            print("Server sync timeout")
            self.error_count += 1
            self.last_error = "Request timeout"

        except requests.exceptions.ConnectionError:
            print("Server sync connection error")
            self.error_count += 1
            self.last_error = "Connection error"

        except Exception as e:
            print(f"Server sync error: {e}")
            self.error_count += 1
            self.last_error = str(e)

    def get_stats(self) -> dict:
        """Get sync statistics."""
        return {
            'sent': self.sent_count,
            'errors': self.error_count,
            'last_error': self.last_error,
            'queue_size': self.send_queue.qsize()
        }

    def is_healthy(self) -> bool:
        """Check if sync is working (no recent errors)."""
        # Consider healthy if less than 10% error rate
        total = self.sent_count + self.error_count
        if total == 0:
            return True
        return (self.error_count / total) < 0.1