import json
from typing import Optional, List
from fastapi import FastAPI, APIRouter, Query, Request, Response
from fastapi.responses import JSONResponse
from pydantic import BaseModel, Field
from pydantic import ConfigDict, field_validator

app = FastAPI()

class AdBase(BaseModel):
    id: str
    title: str
    owner: Optional[str] = None
    doc_id: Optional[List[str]] = None

class AdGetRequest(AdBase):
    page: int = Field(0, gt=-1)
    filters: Optional[dict] = Field(
        default=None,
        example={"location": ["Ankara", "İstanbul"], "position_title": "Yazılım"}
    )
    owner: Optional[str] = Field(None)
    doc_id: Optional[List[str]] = Field(None)
    
    model_config = ConfigDict(extra="ignore")
    
    @field_validator("filters", mode="before")
    def parse_filters(cls, value):
        if value is None:
            return value
        if isinstance(value, str):
            try:
                return json.loads(value)
            except json.JSONDecodeError:
                raise ValueError("filters must be a valid JSON string representing a dictionary")
        return value

@app.get("/management")
async def get_ads(request: Request, ad: AdGetRequest = Query(...)):
    print(f"Received Filters: {ad.filters}")
    
    return JSONResponse(content={"message": "Filters received","filters": ad.filters})

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000)