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_routing_rules import Chat_routing_rulesService

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

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


# ---------- Pydantic Schemas ----------
class Chat_routing_rulesData(BaseModel):
    """Entity data schema (for create/update)"""
    name: str
    priority: int
    match_conditions: str = None
    target_department_id: int = None
    target_seat_id: int = None
    is_active: bool = None


class Chat_routing_rulesUpdateData(BaseModel):
    """Update entity data (partial updates allowed)"""
    name: Optional[str] = None
    priority: Optional[int] = None
    match_conditions: Optional[str] = None
    target_department_id: Optional[int] = None
    target_seat_id: Optional[int] = None
    is_active: Optional[bool] = None


class Chat_routing_rulesResponse(BaseModel):
    """Entity response schema"""
    id: int
    name: str
    priority: int
    match_conditions: Optional[str] = None
    target_department_id: Optional[int] = None
    target_seat_id: Optional[int] = None
    is_active: Optional[bool] = None
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


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


class Chat_routing_rulesBatchCreateRequest(BaseModel):
    """Batch create request"""
    items: List[Chat_routing_rulesData]


class Chat_routing_rulesBatchUpdateItem(BaseModel):
    """Batch update item"""
    id: int
    updates: Chat_routing_rulesUpdateData


class Chat_routing_rulesBatchUpdateRequest(BaseModel):
    """Batch update request"""
    items: List[Chat_routing_rulesBatchUpdateItem]


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


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


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

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


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


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


@router.post("/batch", response_model=List[Chat_routing_rulesResponse], status_code=201)
async def create_chat_routing_ruless_batch(
    request: Chat_routing_rulesBatchCreateRequest,
    db: AsyncSession = Depends(get_db),
):
    """Create multiple chat_routing_ruless in a single request"""
    logger.debug(f"Batch creating {len(request.items)} chat_routing_ruless")
    
    service = Chat_routing_rulesService(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_routing_ruless 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_routing_rulesResponse])
async def update_chat_routing_ruless_batch(
    request: Chat_routing_rulesBatchUpdateRequest,
    db: AsyncSession = Depends(get_db),
):
    """Update multiple chat_routing_ruless in a single request"""
    logger.debug(f"Batch updating {len(request.items)} chat_routing_ruless")
    
    service = Chat_routing_rulesService(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_routing_ruless 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_routing_rulesResponse)
async def update_chat_routing_rules(
    id: int,
    data: Chat_routing_rulesUpdateData,
    db: AsyncSession = Depends(get_db),
):
    """Update an existing chat_routing_rules"""
    logger.debug(f"Updating chat_routing_rules {id} with data: {data}")

    service = Chat_routing_rulesService(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_routing_rules with id {id} not found for update")
            raise HTTPException(status_code=404, detail="Chat_routing_rules not found")
        
        logger.info(f"Chat_routing_rules {id} updated successfully")
        return result
    except HTTPException:
        raise
    except ValueError as e:
        logger.error(f"Validation error updating chat_routing_rules {id}: {str(e)}")
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        logger.error(f"Error updating chat_routing_rules {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_routing_ruless_batch(
    request: Chat_routing_rulesBatchDeleteRequest,
    db: AsyncSession = Depends(get_db),
):
    """Delete multiple chat_routing_ruless by their IDs"""
    logger.debug(f"Batch deleting {len(request.ids)} chat_routing_ruless")
    
    service = Chat_routing_rulesService(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_routing_ruless successfully")
        return {"message": f"Successfully deleted {deleted_count} chat_routing_ruless", "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_routing_rules(
    id: int,
    db: AsyncSession = Depends(get_db),
):
    """Delete a single chat_routing_rules by ID"""
    logger.debug(f"Deleting chat_routing_rules with id: {id}")
    
    service = Chat_routing_rulesService(db)
    try:
        success = await service.delete(id)
        if not success:
            logger.warning(f"Chat_routing_rules with id {id} not found for deletion")
            raise HTTPException(status_code=404, detail="Chat_routing_rules not found")
        
        logger.info(f"Chat_routing_rules {id} deleted successfully")
        return {"message": "Chat_routing_rules deleted successfully", "id": id}
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error deleting chat_routing_rules {id}: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")