"""
Robust document upload script with timeout handling and retries
"""
import requests
import os
import time
from typing import Optional, Dict, Any

class RobustDocumentUploader:
    def __init__(self, base_url: str = "http://localhost:3015", api_key: str = "jleu1212"):
        self.base_url = base_url
        self.api_key = api_key
        self.default_timeout = 30  # seconds
        self.max_retries = 3
        self.retry_delay = 5  # seconds
        
    def upload_document(self, file_path: str, timeout: Optional[int] = None) -> Dict[str, Any]:
        """
        Upload a document with robust error handling and retries
        
        Args:
            file_path: Path to the document file
            timeout: Timeout in seconds (default: 30)
            
        Returns:
            Dictionary with upload results
        """
        if not os.path.exists(file_path):
            return {
                "success": False,
                "error": f"File not found: {file_path}",
                "status_code": None
            }
        
        file_name = os.path.basename(file_path)
        file_size = os.path.getsize(file_path)
        
        print(f"📤 Uploading {file_name} ({file_size:,} bytes) to {self.base_url}")
        
        # Determine content type based on file extension
        content_type = self._get_content_type(file_name)
        
        # Try multiple endpoints
        endpoints = [
            f"{self.base_url}/documents/upload",
            f"{self.base_url}/upload",
            f"{self.base_url}/api/documents/upload"
        ]
        
        headers = {"X-API-Key": self.api_key}
        timeout = timeout or self.default_timeout
        
        last_error = None
        
        for retry in range(self.max_retries):
            for endpoint in endpoints:
                try:
                    print(f"  Attempt {retry + 1}/{self.max_retries}: {endpoint}")
                    
                    with open(file_path, 'rb') as f:
                        files = {'file': (file_name, f, content_type)}
                        
                        response = requests.post(
                            endpoint,
                            files=files,
                            headers=headers,
                            timeout=timeout
                        )
                        
                        print(f"    Status: {response.status_code}")
                        
                        if response.status_code == 200:
                            print(f"✅ Upload successful!")
                            return {
                                "success": True,
                                "status_code": response.status_code,
                                "response": response.json() if response.text else {},
                                "endpoint": endpoint,
                                "retry_count": retry
                            }
                        elif response.status_code == 504:
                            print(f"⏰ Gateway timeout (504) - server processing may be slow")
                            last_error = f"Gateway timeout: {response.text[:200]}"
                        else:
                            print(f"❌ Upload failed: {response.status_code} - {response.text[:200]}")
                            last_error = f"HTTP {response.status_code}: {response.text[:200]}"
                            
                except requests.exceptions.Timeout:
                    print(f"⏰ Request timeout after {timeout} seconds")
                    last_error = f"Request timeout after {timeout} seconds"
                except requests.exceptions.ConnectionError as e:
                    print(f"🔌 Connection error: {e}")
                    last_error = f"Connection error: {e}"
                except Exception as e:
                    print(f"❌ Unexpected error: {type(e).__name__}: {e}")
                    last_error = f"{type(e).__name__}: {e}"
            
            # If we've tried all endpoints and still failed, wait before retry
            if retry < self.max_retries - 1:
                print(f"  Waiting {self.retry_delay} seconds before retry...")
                time.sleep(self.retry_delay)
        
        print(f"❌ All upload attempts failed")
        return {
            "success": False,
            "error": last_error or "Unknown error",
            "status_code": None,
            "retry_count": self.max_retries
        }
    
    def _get_content_type(self, filename: str) -> str:
        """Get appropriate content type based on file extension"""
        ext = os.path.splitext(filename)[1].lower()
        
        content_types = {
            '.pdf': 'application/pdf',
            '.docx': 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
            '.doc': 'application/msword',
            '.txt': 'text/plain',
            '.png': 'image/png',
            '.jpg': 'image/jpeg',
            '.jpeg': 'image/jpeg',
            '.pptx': 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
            '.xlsx': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
        }
        
        return content_types.get(ext, 'application/octet-stream')
    
    def check_server_health(self, timeout: int = 5) -> bool:
        """Check if server is responsive"""
        try:
            response = requests.get(f"{self.base_url}/health", timeout=timeout)
            return response.status_code == 200
        except:
            return False

def upload_tir_docx():
    """Specific function to upload tir.docx with robust handling"""
    uploader = RobustDocumentUploader()
    
    # Check server health first
    print("🔍 Checking server health...")
    if not uploader.check_server_health():
        print("⚠️  Server may not be responding. Trying upload anyway...")
    
    # Upload the document
    result = uploader.upload_document("test/tir.docx", timeout=60)
    
    if result["success"]:
        print(f"\n🎉 Upload completed successfully!")
        print(f"   Endpoint: {result.get('endpoint')}")
        print(f"   Retries: {result.get('retry_count')}")
        if "response" in result and result["response"]:
            print(f"   Message: {result['response'].get('message', 'N/A')}")
            if "track_id" in result["response"]:
                print(f"   Track ID: {result['response']['track_id']}")
    else:
        print(f"\n❌ Upload failed: {result.get('error')}")
        print("\n💡 Suggestions:")
        print("   1. Check if the server is running (port 3015)")
        print("   2. Try increasing the timeout (currently 60 seconds)")
        print("   3. Check server logs for processing errors")
        print("   4. Try with a smaller file first")
    
    return result

if __name__ == "__main__":
    upload_tir_docx()