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.chat_messages import Chat_messagesService

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

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


# ---------- Pydantic Schemas ----------
class Chat_messagesData(BaseModel):
    """Entity data schema (for create/update)"""
    conversation_id: int
    sender_type: str
    sender_seat_id: int = None
    sender_name: str = None
    content: str
    attachments: str = None
    is_internal_note: bool = None
    ai_confidence: float = None


class Chat_messagesUpdateData(BaseModel):
    """Update entity data (partial updates allowed)"""
    conversation_id: Optional[int] = None
    sender_type: Optional[str] = None
    sender_seat_id: Optional[int] = None
    sender_name: Optional[str] = None
    content: Optional[str] = None
    attachments: Optional[str] = None
    is_internal_note: Optional[bool] = None
    ai_confidence: Optional[float] = None


class Chat_messagesResponse(BaseModel):
    """Entity response schema"""
    id: int
    conversation_id: int
    sender_type: str
    sender_seat_id: Optional[int] = None
    sender_name: Optional[str] = None
    content: str
    attachments: Optional[str] = None
    is_internal_note: Optional[bool] = None
    ai_confidence: Optional[float] = None
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


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


class Chat_messagesBatchCreateRequest(BaseModel):
    """Batch create request"""
    items: List[Chat_messagesData]


class Chat_messagesBatchUpdateItem(BaseModel):
    """Batch update item"""
    id: int
    updates: Chat_messagesUpdateData


class Chat_messagesBatchUpdateRequest(BaseModel):
    """Batch update request"""
    items: List[Chat_messagesBatchUpdateItem]


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


# ---------- Routes ----------
@router.get("", response_model=Chat_messagesListResponse)
async def query_chat_messagess(
    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 chat_messagess with filtering, sorting, and pagination"""
    logger.debug(f"Querying chat_messagess: query={query}, sort={sort}, skip={skip}, limit={limit}, fields={fields}")
    
    service = Chat_messagesService(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']} chat_messagess")
        return result
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error querying chat_messagess: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.get("/all", response_model=Chat_messagesListResponse)
async def query_chat_messagess_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 chat_messagess with filtering, sorting, and pagination without user limitation
    logger.debug(f"Querying chat_messagess: query={query}, sort={sort}, skip={skip}, limit={limit}, fields={fields}")

    service = Chat_messagesService(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']} chat_messagess")
        return result
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error querying chat_messagess: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


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


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


@router.post("/batch", response_model=List[Chat_messagesResponse], status_code=201)
async def create_chat_messagess_batch(
    request: Chat_messagesBatchCreateRequest,
    db: AsyncSession = Depends(get_db),
):
    """Create multiple chat_messagess in a single request"""
    logger.debug(f"Batch creating {len(request.items)} chat_messagess")
    
    service = Chat_messagesService(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)} chat_messagess 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[Chat_messagesResponse])
async def update_chat_messagess_batch(
    request: Chat_messagesBatchUpdateRequest,
    db: AsyncSession = Depends(get_db),
):
    """Update multiple chat_messagess in a single request"""
    logger.debug(f"Batch updating {len(request.items)} chat_messagess")
    
    service = Chat_messagesService(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)} chat_messagess 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=Chat_messagesResponse)
async def update_chat_messages(
    id: int,
    data: Chat_messagesUpdateData,
    db: AsyncSession = Depends(get_db),
):
    """Update an existing chat_messages"""
    logger.debug(f"Updating chat_messages {id} with data: {data}")

    service = Chat_messagesService(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"Chat_messages with id {id} not found for update")
            raise HTTPException(status_code=404, detail="Chat_messages not found")
        
        logger.info(f"Chat_messages {id} updated successfully")
        return result
    except HTTPException:
        raise
    except ValueError as e:
        logger.error(f"Validation error updating chat_messages {id}: {str(e)}")
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        logger.error(f"Error updating chat_messages {id}: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")


@router.delete("/batch")
async def delete_chat_messagess_batch(
    request: Chat_messagesBatchDeleteRequest,
    db: AsyncSession = Depends(get_db),
):
    """Delete multiple chat_messagess by their IDs"""
    logger.debug(f"Batch deleting {len(request.ids)} chat_messagess")
    
    service = Chat_messagesService(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} chat_messagess successfully")
        return {"message": f"Successfully deleted {deleted_count} chat_messagess", "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_chat_messages(
    id: int,
    db: AsyncSession = Depends(get_db),
):
    """Delete a single chat_messages by ID"""
    logger.debug(f"Deleting chat_messages with id: {id}")
    
    service = Chat_messagesService(db)
    try:
        success = await service.delete(id)
        if not success:
            logger.warning(f"Chat_messages with id {id} not found for deletion")
            raise HTTPException(status_code=404, detail="Chat_messages not found")
        
        logger.info(f"Chat_messages {id} deleted successfully")
        return {"message": "Chat_messages deleted successfully", "id": id}
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error deleting chat_messages {id}: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")