from __future__ import annotations

from dataclasses import dataclass

from app.communication.external.http_client import get_http_client
from app.core.config import settings


@dataclass
class OAuthUserInfo:
    provider: str
    provider_user_id: str
    email: str
    name: str


async def get_google_user_info(code: str, redirect_uri: str) -> OAuthUserInfo:
    client = await get_http_client()

    token_resp = await client.post(
        "https://oauth2.googleapis.com/token",
        data={
            "code": code,
            "client_id": settings.GOOGLE_CLIENT_ID,
            "client_secret": settings.GOOGLE_CLIENT_SECRET,
            "redirect_uri": redirect_uri,
            "grant_type": "authorization_code",
        },
    )
    token_resp.raise_for_status()
    access_token = token_resp.json()["access_token"]

    user_resp = await client.get(
        "https://www.googleapis.com/oauth2/v2/userinfo",
        headers={"Authorization": f"Bearer {access_token}"},
    )
    user_resp.raise_for_status()
    data = user_resp.json()

    return OAuthUserInfo(
        provider="google",
        provider_user_id=data["id"],
        email=data["email"],
        name=data.get("name", ""),
    )


async def get_kakao_user_info(code: str, redirect_uri: str) -> OAuthUserInfo:
    client = await get_http_client()

    token_resp = await client.post(
        "https://kauth.kakao.com/oauth/token",
        data={
            "grant_type": "authorization_code",
            "client_id": settings.KAKAO_CLIENT_ID,
            "client_secret": settings.KAKAO_CLIENT_SECRET,
            "redirect_uri": redirect_uri,
            "code": code,
        },
    )
    token_resp.raise_for_status()
    access_token = token_resp.json()["access_token"]

    user_resp = await client.get(
        "https://kapi.kakao.com/v2/user/me",
        headers={"Authorization": f"Bearer {access_token}"},
    )
    user_resp.raise_for_status()
    data = user_resp.json()

    account = data.get("kakao_account", {})
    return OAuthUserInfo(
        provider="kakao",
        provider_user_id=str(data["id"]),
        email=account.get("email", ""),
        name=account.get("profile", {}).get("nickname", ""),
    )


async def get_naver_user_info(code: str, redirect_uri: str) -> OAuthUserInfo:
    client = await get_http_client()

    token_resp = await client.post(
        "https://nid.naver.com/oauth2.0/token",
        data={
            "grant_type": "authorization_code",
            "client_id": settings.NAVER_CLIENT_ID,
            "client_secret": settings.NAVER_CLIENT_SECRET,
            "code": code,
        },
    )
    token_resp.raise_for_status()
    access_token = token_resp.json()["access_token"]

    user_resp = await client.get(
        "https://openapi.naver.com/v1/nid/me",
        headers={"Authorization": f"Bearer {access_token}"},
    )
    user_resp.raise_for_status()
    data = user_resp.json()["response"]

    return OAuthUserInfo(
        provider="naver",
        provider_user_id=data["id"],
        email=data.get("email", ""),
        name=data.get("name", ""),
    )


OAUTH_PROVIDERS = {
    "google": get_google_user_info,
    "kakao": get_kakao_user_info,
    "naver": get_naver_user_info,
}