import json
import logging
from typing import List, Optional

from datetime import datetime, date

from fastapi import APIRouter, Body, Depends, HTTPException, Query
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession

from core.database import get_db
from services.kb_articles import Kb_articlesService

# Set up logging
logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api/v1/entities/kb_articles", tags=["kb_articles"])


# ---------- Pydantic Schemas ----------
class Kb_articlesData(BaseModel):
    """Entity data schema (for create/update)"""
    title: str
    slug: str = None
    source: str
    source_url: str = None
    content: str
    tags: str = None
    is_published: bool = None


class Kb_articlesUpdateData(BaseModel):
    """Update entity data (partial updates allowed)"""
    title: Optional[str] = None
    slug: Optional[str] = None
    source: Optional[str] = None
    source_url: Optional[str] = None
    content: Optional[str] = None
    tags: Optional[str] = None
    is_published: Optional[bool] = None


class Kb_articlesResponse(BaseModel):
    """Entity response schema"""
    id: int
    title: str
    slug: Optional[str] = None
    source: str
    source_url: Optional[str] = None
    content: str
    tags: Optional[str] = None
    is_published: Optional[bool] = None
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class Kb_articlesListResponse(BaseModel):
    """List response schema"""
    items: List[Kb_articlesResponse]
    total: int
    skip: int
    limit: int


class Kb_articlesBatchCreateRequest(BaseModel):
    """Batch create request"""
    items: List[Kb_articlesData]


class Kb_articlesBatchUpdateItem(BaseModel):
    """Batch update item"""
    id: int
    updates: Kb_articlesUpdateData


class Kb_articlesBatchUpdateRequest(BaseModel):
    """Batch update request"""
    items: List[Kb_articlesBatchUpdateItem]


class Kb_articlesBatchDeleteRequest(BaseModel):
    """Batch delete request"""
    ids: List[int]


# ---------- Routes ----------
@router.get("", response_model=Kb_articlesListResponse)
async def query_kb_articless(
    query: str = Query(None, description="Query conditions (JSON string)"),
    sort: str = Query(None, description="Sort field (prefix with '-' for descending)"),
    skip: int = Query(0, ge=0, description="Number of records to skip"),
    limit: int = Query(20, ge=1, le=2000, description="Max number of records to return"),
    fields: str = Query(None, description="Comma-separated list of fields to return"),
    db: AsyncSession = Depends(get_db),
):
    """Query kb_articless with filtering, sorting, and pagination"""
    logger.debug(f"Querying kb_articless: query={query}, sort={sort}, skip={skip}, limit={limit}, fields={fields}")
    
    service = Kb_articlesService(db)
    try:
        # Parse query JSON if provided
        query_dict = None
        if query:
            try:
                query_dict = json.loads(query)
            except json.JSONDecodeError:
                raise HTTPException(status_code=400, detail="Invalid query JSON format")
        
        result = await service.get_list(
            skip=skip, 
            limit=limit,
            query_dict=query_dict,
            sort=sort,
        )
        logger.debug(f"Found {result['total']} kb_articless")
        return result
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error querying kb_articless: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.get("/all", response_model=Kb_articlesListResponse)
async def query_kb_articless_all(
    query: str = Query(None, description="Query conditions (JSON string)"),
    sort: str = Query(None, description="Sort field (prefix with '-' for descending)"),
    skip: int = Query(0, ge=0, description="Number of records to skip"),
    limit: int = Query(20, ge=1, le=2000, description="Max number of records to return"),
    fields: str = Query(None, description="Comma-separated list of fields to return"),
    db: AsyncSession = Depends(get_db),
):
    # Query kb_articless with filtering, sorting, and pagination without user limitation
    logger.debug(f"Querying kb_articless: query={query}, sort={sort}, skip={skip}, limit={limit}, fields={fields}")

    service = Kb_articlesService(db)
    try:
        # Parse query JSON if provided
        query_dict = None
        if query:
            try:
                query_dict = json.loads(query)
            except json.JSONDecodeError:
                raise HTTPException(status_code=400, detail="Invalid query JSON format")

        result = await service.get_list(
            skip=skip,
            limit=limit,
            query_dict=query_dict,
            sort=sort
        )
        logger.debug(f"Found {result['total']} kb_articless")
        return result
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error querying kb_articless: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.get("/{id}", response_model=Kb_articlesResponse)
async def get_kb_articles(
    id: int,
    fields: str = Query(None, description="Comma-separated list of fields to return"),
    db: AsyncSession = Depends(get_db),
):
    """Get a single kb_articles by ID"""
    logger.debug(f"Fetching kb_articles with id: {id}, fields={fields}")
    
    service = Kb_articlesService(db)
    try:
        result = await service.get_by_id(id)
        if not result:
            logger.warning(f"Kb_articles with id {id} not found")
            raise HTTPException(status_code=404, detail="Kb_articles not found")
        
        return result
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error fetching kb_articles {id}: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.post("", response_model=Kb_articlesResponse, status_code=201)
async def create_kb_articles(
    data: Kb_articlesData,
    db: AsyncSession = Depends(get_db),
):
    """Create a new kb_articles"""
    logger.debug(f"Creating new kb_articles with data: {data}")
    
    service = Kb_articlesService(db)
    try:
        result = await service.create(data.model_dump())
        if not result:
            raise HTTPException(status_code=400, detail="Failed to create kb_articles")
        
        logger.info(f"Kb_articles created successfully with id: {result.id}")
        return result
    except ValueError as e:
        logger.error(f"Validation error creating kb_articles: {str(e)}")
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        logger.error(f"Error creating kb_articles: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.post("/batch", response_model=List[Kb_articlesResponse], status_code=201)
async def create_kb_articless_batch(
    request: Kb_articlesBatchCreateRequest,
    db: AsyncSession = Depends(get_db),
):
    """Create multiple kb_articless in a single request"""
    logger.debug(f"Batch creating {len(request.items)} kb_articless")
    
    service = Kb_articlesService(db)
    results = []
    
    try:
        for item_data in request.items:
            result = await service.create(item_data.model_dump())
            if result:
                results.append(result)
        
        logger.info(f"Batch created {len(results)} kb_articless successfully")
        return results
    except Exception as e:
        await db.rollback()
        logger.error(f"Error in batch create: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Batch create failed: {str(e)}")


@router.put("/batch", response_model=List[Kb_articlesResponse])
async def update_kb_articless_batch(
    request: Kb_articlesBatchUpdateRequest,
    db: AsyncSession = Depends(get_db),
):
    """Update multiple kb_articless in a single request"""
    logger.debug(f"Batch updating {len(request.items)} kb_articless")
    
    service = Kb_articlesService(db)
    results = []
    
    try:
        for item in request.items:
            # Only include non-None values for partial updates
            update_dict = {k: v for k, v in item.updates.model_dump().items() if v is not None}
            result = await service.update(item.id, update_dict)
            if result:
                results.append(result)
        
        logger.info(f"Batch updated {len(results)} kb_articless successfully")
        return results
    except Exception as e:
        await db.rollback()
        logger.error(f"Error in batch update: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Batch update failed: {str(e)}")


@router.put("/{id}", response_model=Kb_articlesResponse)
async def update_kb_articles(
    id: int,
    data: Kb_articlesUpdateData,
    db: AsyncSession = Depends(get_db),
):
    """Update an existing kb_articles"""
    logger.debug(f"Updating kb_articles {id} with data: {data}")

    service = Kb_articlesService(db)
    try:
        # Only include non-None values for partial updates
        update_dict = {k: v for k, v in data.model_dump().items() if v is not None}
        result = await service.update(id, update_dict)
        if not result:
            logger.warning(f"Kb_articles with id {id} not found for update")
            raise HTTPException(status_code=404, detail="Kb_articles not found")
        
        logger.info(f"Kb_articles {id} updated successfully")
        return result
    except HTTPException:
        raise
    except ValueError as e:
        logger.error(f"Validation error updating kb_articles {id}: {str(e)}")
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        logger.error(f"Error updating kb_articles {id}: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.delete("/batch")
async def delete_kb_articless_batch(
    request: Kb_articlesBatchDeleteRequest,
    db: AsyncSession = Depends(get_db),
):
    """Delete multiple kb_articless by their IDs"""
    logger.debug(f"Batch deleting {len(request.ids)} kb_articless")
    
    service = Kb_articlesService(db)
    deleted_count = 0
    
    try:
        for item_id in request.ids:
            success = await service.delete(item_id)
            if success:
                deleted_count += 1
        
        logger.info(f"Batch deleted {deleted_count} kb_articless successfully")
        return {"message": f"Successfully deleted {deleted_count} kb_articless", "deleted_count": deleted_count}
    except Exception as e:
        await db.rollback()
        logger.error(f"Error in batch delete: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Batch delete failed: {str(e)}")


@router.delete("/{id}")
async def delete_kb_articles(
    id: int,
    db: AsyncSession = Depends(get_db),
):
    """Delete a single kb_articles by ID"""
    logger.debug(f"Deleting kb_articles with id: {id}")
    
    service = Kb_articlesService(db)
    try:
        success = await service.delete(id)
        if not success:
            logger.warning(f"Kb_articles with id {id} not found for deletion")
            raise HTTPException(status_code=404, detail="Kb_articles not found")
        
        logger.info(f"Kb_articles {id} deleted successfully")
        return {"message": "Kb_articles deleted successfully", "id": id}
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error deleting kb_articles {id}: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")