"""
app/routers/ingest.py
API-Endpunkte für WP-11 (Discovery & Persistence).
Robustified for Frontend Integration.
"""
import os
import time
import logging
from fastapi import APIRouter, HTTPException
from pydantic import BaseModel
from typing import Optional, List, Dict, Any

from app.core.ingestion import IngestionService
from app.services.discovery import DiscoveryService

# Logger für Backend-Debugging aktivieren
logger = logging.getLogger("uvicorn.error")

router = APIRouter()

# --- DTOs (Data Transfer Objects) ---

class AnalyzeRequest(BaseModel):
    text: str
    type: str = "concept"

class SaveRequest(BaseModel):
    markdown_content: str
    filename: Optional[str] = None 
    folder: str = "00_Inbox"       # Standard-Ordner

class SaveResponse(BaseModel):
    status: str
    file_path: str
    note_id: str
    stats: Dict[str, Any]

# --- Services ---
discovery_service = DiscoveryService()

@router.post("/analyze")
async def analyze_draft(req: AnalyzeRequest):
    """
    WP-11 Intelligence: Liefert Link-Vorschläge basierend auf Text und Typ.
    """
    try:
        # Prio 2: Intelligence Service aufrufen
        result = await discovery_service.analyze_draft(req.text, req.type)
        return result
    except Exception as e:
        logger.error(f"Analyze failed: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Analysis failed: {str(e)}")

@router.post("/save", response_model=SaveResponse)
async def save_note(req: SaveRequest):
    """
    WP-11 Persistence: Speichert Markdown physisch und indiziert es sofort.
    """
    try:
        # 1. Vault Root sicher ermitteln
        vault_root = os.getenv("MINDNET_VAULT_ROOT", "./vault")
        
        # Absolute Pfade auflösen, um CWD-Probleme zu vermeiden
        abs_vault_root = os.path.abspath(vault_root)
        
        if not os.path.exists(abs_vault_root):
            error_msg = f"Vault root not found at: {abs_vault_root}. Check MINDNET_VAULT_ROOT in .env"
            logger.error(error_msg)
            raise HTTPException(status_code=500, detail=error_msg)

        # 2. Filename Fallback
        final_filename = req.filename
        if not final_filename:
            final_filename = f"draft_{int(time.time())}.md"

        # 3. Ingestion Service aufrufen
        ingest_service = IngestionService() 
        
        logger.info(f"Attempting to save {final_filename} to {req.folder} in {abs_vault_root}")

        result = ingest_service.create_from_text(
            markdown_content=req.markdown_content,
            filename=final_filename,
            vault_root=abs_vault_root,
            folder=req.folder
        )
        
        # Fehler vom Service abfangen
        if result.get("status") == "error":
            raise HTTPException(status_code=500, detail=result.get("error"))
            
        return SaveResponse(
            status="success",
            file_path=result["path"],
            note_id=result.get("note_id", "unknown"),
            stats={
                "chunks": result.get("chunks_count", 0),
                "edges": result.get("edges_count", 0)
            }
        )

    except HTTPException as he:
        raise he
    except Exception as e:
        logger.error(f"Save failed: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Save failed: {str(e)}")