routes/approvals.py

import os
import logging
import aiohttp
import asyncio
from fastapi import APIRouter, HTTPException, Header
from typing import Dict, Any, Optional
from functools import lru_cache
from pydantic import BaseModel
import requests
from collections import defaultdict

router = APIRouter()

# 📦 Models
class ApproveAccountRequest(BaseModel):
    user_id: str

class RejectAccountRequest(BaseModel):
    user_id: str
    reason: Optional[str] = None

# 🔥 Supabase Configuração com Secrets
SUPABASE_URL = "https://ussxqnifefkgkaumjann.supabase.co"
SUPABASE_KEY = os.getenv("SUPA_KEY")
SUPABASE_ROLE_KEY = os.getenv("SUPA_SERVICE_KEY")

if not SUPABASE_KEY or not SUPABASE_ROLE_KEY:
    raise ValueError("❌ SUPA_KEY ou SUPA_SERVICE_KEY não foram definidos no ambiente!")

SUPABASE_HEADERS = {
    "apikey": SUPABASE_KEY,
    "Authorization": f"Bearer {SUPABASE_KEY}",
    "Content-Type": "application/json"
}

SUPABASE_ROLE_HEADERS = {
    "apikey": SUPABASE_ROLE_KEY,
    "Authorization": f"Bearer {SUPABASE_ROLE_KEY}",
    "Content-Type": "application/json"
}

# ⚙️ Logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# 🔒 Cache de admin
@lru_cache(maxsize=128)
def get_cached_admin_status(user_id: str) -> bool:
    user_data_url = f"{SUPABASE_URL}/rest/v1/User?id=eq.{user_id}"
    response = requests.get(user_data_url, headers=SUPABASE_HEADERS)
    
    if response.status_code != 200 or not response.json():
        return False
    
    user_info = response.json()[0]
    return user_info.get("is_admin", False)

# Nova função para obter permissões do usuário
async def get_user_permissions(user_id: str) -> Dict[str, bool]:
    """Obtém as permissões de um usuário, incluindo approve_stylists"""
    user_data_url = f"{SUPABASE_URL}/rest/v1/User?id=eq.{user_id}&select=is_admin,approve_stylists"
    
    async with aiohttp.ClientSession() as session:
        async with session.get(user_data_url, headers=SUPABASE_HEADERS) as response:
            if response.status != 200 or not await response.json():
                return {"is_admin": False, "approve_stylists": False}
            
            user_info = (await response.json())[0]
            return {
                "is_admin": user_info.get("is_admin", False),
                "approve_stylists": user_info.get("approve_stylists", False)
            }

# 🔐 Verificação de token com permissões especificadas
async def verify_token_with_permissions(user_token: str, required_permission: Optional[str] = None) -> Dict[str, Any]:
    """Verifica o token e verifica se o usuário tem a permissão necessária"""
    headers = {
        "Authorization": f"Bearer {user_token}",
        "apikey": SUPABASE_KEY,
        "Content-Type": "application/json"
    }

    async with aiohttp.ClientSession() as session:
        async with session.get(f"{SUPABASE_URL}/auth/v1/user", headers=headers) as response:
            if response.status != 200:
                raise HTTPException(status_code=401, detail="Token inválido ou expirado")
            
            user_data = await response.json()
            user_id = user_data.get("id")
            if not user_id:
                raise HTTPException(status_code=400, detail="ID do usuário não encontrado")
    
    # Obter permissões do usuário
    permissions = await get_user_permissions(user_id)
    
    # Verificar permissão específica, se requisitada
    if required_permission:
        has_permission = permissions.get(required_permission, False)
        if not has_permission:
            raise HTTPException(
                status_code=403, 
                detail=f"Acesso negado: permissão '{required_permission}' necessária"
            )
    
    return {
        "user_id": user_id,
        "permissions": permissions
    }

# 🔐 Verificação de token admin (mantida para compatibilidade)
async def verify_admin_token(user_token: str) -> str:
    headers = {
        "Authorization": f"Bearer {user_token}",
        "apikey": SUPABASE_KEY,
        "Content-Type": "application/json"
    }

    async with aiohttp.ClientSession() as session:
        async with session.get(f"{SUPABASE_URL}/auth/v1/user", headers=headers) as response:
            if response.status != 200:
                raise HTTPException(status_code=401, detail="Token inválido ou expirado")
            
            user_data = await response.json()
            user_id = user_data.get("id")
            if not user_id:
                raise HTTPException(status_code=400, detail="ID do usuário não encontrado")
    
    is_admin = await asyncio.to_thread(get_cached_admin_status, user_id)

    if not is_admin:
        raise HTTPException(status_code=403, detail="Acesso negado: privilégios de administrador necessários")

    return user_id

# 📥 Buscar usuários pendentes com respostas
async def get_users_pending_approval() -> Dict[str, Any]:
    try:
        query_users = (
            f"{SUPABASE_URL}/rest/v1/User"
            "?select=id,name,avatar,role,blurhash"
            "&approved_account=eq.false"
            "&finished_onboarding=eq.true"
            "&or=(approval_reason.is.null,approval_reason.eq.)"
        )

        headers = SUPABASE_HEADERS.copy()
        headers["Accept"] = "application/json; charset=utf-8"

        async with aiohttp.ClientSession() as session:
            async with session.get(query_users, headers=headers) as response:
                if response.status != 200:
                    logger.error(f"❌ Erro ao buscar usuários pendentes: {response.status}")
                    raise HTTPException(status_code=500, detail="Erro ao consultar usuários")
                users = await response.json()

            if not users:
                return {"users": [], "count": 0}

            user_ids = [user['id'] for user in users]
            user_ids_str = ",".join(user_ids)

            query_answers = (
                f"{SUPABASE_URL}/rest/v1/User answers"
                f"?select=user_id,question_id,answers"
                f"&user_id=in.({user_ids_str})"
            )

            async with session.get(query_answers, headers=headers) as response:
                if response.status != 200:
                    logger.warning("⚠️ Erro ao buscar respostas de usuários")
                    user_answers = []
                else:
                    user_answers = await response.json()

            query_questions = f"{SUPABASE_URL}/rest/v1/Onboarding?select=id,title"
            async with session.get(query_questions, headers=headers) as response:
                if response.status != 200:
                    logger.warning("⚠️ Erro ao buscar perguntas")
                    questions = []
                else:
                    questions = await response.json()

        question_map = {q["id"]: q["title"] for q in questions}
        grouped_answers = defaultdict(list)

        for answer in user_answers:
            title = question_map.get(answer["question_id"], "Pergunta desconhecida")
            grouped_answers[answer["user_id"]].append({
                "question": title,
                "answer": answer.get("answers", [])
            })

        for user in users:
            user["answers"] = grouped_answers.get(user["id"], [])

        return {"users": users, "count": len(users)}

    except Exception as e:
        logger.error(f"❌ Erro ao buscar usuários e respostas: {str(e)}")
        raise HTTPException(status_code=500, detail="Erro interno do servidor")

# ✅ Aprovar conta
@router.post("/admin/approve-account")
async def approve_account(
    body: ApproveAccountRequest,
    user_token: str = Header(None, alias="User-key")
):
    try:
        # Verificar se o usuário tem permissão para aprovar estilistas
        user_info = await verify_token_with_permissions(user_token, "approve_stylists")

        update_url = f"{SUPABASE_URL}/rest/v1/User?id=eq.{body.user_id}"
        payload = { "approved_account": True }

        async with aiohttp.ClientSession() as session:
            async with session.patch(update_url, headers=SUPABASE_ROLE_HEADERS, json=payload) as response:
                if response.status != 204:
                    logger.error(f"❌ Erro ao aprovar conta: {response.status}")
                    raise HTTPException(status_code=500, detail="Erro ao aprovar a conta")

        return {"status": "success", "message": "Conta aprovada com sucesso."}
    
    except HTTPException as he:
        raise he
    except Exception as e:
        logger.error(f"❌ Erro ao aprovar conta: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

# ❌ Reprovar conta
@router.post("/admin/reject-account")
async def reject_account(
    body: RejectAccountRequest,
    user_token: str = Header(None, alias="User-key")
):
    try:
        # Verificar se o usuário tem permissão para reprovar estilistas
        user_info = await verify_token_with_permissions(user_token, "approve_stylists")

        update_url = f"{SUPABASE_URL}/rest/v1/User?id=eq.{body.user_id}"
        payload = {
            "approved_account": False,
            "approval_reason": body.reason or "No reason specified"
        }

        async with aiohttp.ClientSession() as session:
            async with session.patch(update_url, headers=SUPABASE_ROLE_HEADERS, json=payload) as response:
                if response.status != 204:
                    logger.error(f"❌ Erro ao reprovar conta: {response.status}")
                    raise HTTPException(status_code=500, detail="Erro ao reprovar a conta")

        return {"status": "success", "message": "Conta reprovada com sucesso."}
    
    except HTTPException as he:
        raise he
    except Exception as e:
        logger.error(f"❌ Erro ao reprovar conta: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

# 🔍 Listar contas pendentes
@router.get("/admin/pending-approvals")
async def pending_approvals_endpoint(
    user_token: str = Header(None, alias="User-key")
):
    try:
        # Verificar se o usuário tem permissão para visualizar estilistas pendentes
        user_info = await verify_token_with_permissions(user_token, "approve_stylists")
        
        return await get_users_pending_approval()
    except HTTPException as he:
        raise he
    except Exception as e:
        logger.error(f"❌ Erro no endpoint de aprovações: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))