from fastapi import APIRouter, Depends, HTTPException
from core.database import fake_users_db
from typing import List

router = APIRouter()

# Demo database of countries
countries_db = {
    "denmark": {"name": "Denmark", "capital": "Copenhagen", "population": 5831000},
    "djibouti": {"name": "Djibouti", "capital": "Djibouti", "population": 988000},
    "dominica": {"name": "Dominica", "capital": "Roseau", "population": 71986},
    "dominican_republic": {"name": "Dominican Republic", "capital": "Santo Domingo", "population": 10847910}
}

@router.post("/d")
async def get_d_countries():
    """Get all countries that start with the letter D"""
    d_countries = {k: v for k, v in countries_db.items() if k.startswith('d')}
    
    if not d_countries:
        raise HTTPException(status_code=404, detail="No countries found starting with 'D'")
    
    return {
        "message": "Countries retrieved successfully",
        "data": d_countries,
        "metadata": {
            "count": len(d_countries),
            "starting_letter": "D",
            "source": "demo_countries_db"
        }
    }