import logging
import httpx

from datetime import datetime
from fastapi import APIRouter, Request, Depends, HTTPException
from fastapi.responses import RedirectResponse, JSONResponse
from web.templates_env import templates
from pydantic import BaseModel
from sqlalchemy.orm import Session

from web.auth import get_current_user
from web.config import settings
from web.database import get_db
from web.models import User, EvotorConnection

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/evotor")

EVOTOR_APP_URL = "https://market.evotor.ru/store/apps/{app_id}"
EVOTOR_STORES_URL = "https://api.evotor.ru/stores"


@router.get("")
def evotor_page(
    request: Request,
    db: Session = Depends(get_db),
    user: User | None = Depends(get_current_user),
):
    if not user:
        return RedirectResponse("/login", 303)

    connection = db.query(EvotorConnection).filter(EvotorConnection.user_id == user.id).first()
    error = request.query_params.get("error")
    app_url = EVOTOR_APP_URL.format(app_id=settings.EVOTOR_APP_ID) if settings.EVOTOR_APP_ID else None
    return templates.TemplateResponse("evotor.html", {
        "request": request,
        "user": user,
        "connection": connection,
        "error": error,
        "app_url": app_url,
    })


class EvotorTokenPayload(BaseModel):
    userId: str
    token: str


@router.post("/callback")
async def evotor_callback(
    request: Request,
    payload: EvotorTokenPayload,
    db: Session = Depends(get_db),
):
    """
    Webhook endpoint: Evotor POSTs {"userId": "...", "token": "..."} here
    after the user authorizes the app in their Evotor account.
    """
    # Verify the Authorization header matches our configured webhook secret
    if settings.EVOTOR_WEBHOOK_SECRET:
        auth_header = request.headers.get("Authorization", "")
        expected = f"Bearer {settings.EVOTOR_WEBHOOK_SECRET}"
        if auth_header != expected:
            logger.warning("Evotor webhook: invalid Authorization header")
            raise HTTPException(status_code=401, detail="Unauthorized")

    now = datetime.utcnow()

    # Fetch store info using the received token
    store_id = None
    store_name = None
    try:
        async with httpx.AsyncClient() as client:
            stores_response = await client.get(
                EVOTOR_STORES_URL,
                headers={"Authorization": f"Bearer {payload.token}"},
                timeout=15,
            )
            if stores_response.status_code == 200:
                stores = stores_response.json()
                items = stores.get("items", stores) if isinstance(stores, dict) else stores
                if items:
                    store_id = items[0].get("uuid") or items[0].get("id")
                    store_name = items[0].get("name")
    except Exception:
        pass  # Store info is optional

    # Upsert by evotor_user_id (user_id stays NULL until /evotor/link is called)
    connection = db.query(EvotorConnection).filter(
        EvotorConnection.evotor_user_id == payload.userId
    ).first()

    if connection:
        connection.access_token = payload.token
        connection.store_id = store_id
        connection.store_name = store_name
        connection.is_online = True
        connection.last_checked_at = now
        connection.updated_at = now
    else:
        connection = EvotorConnection(
            evotor_user_id=payload.userId,
            access_token=payload.token,
            store_id=store_id,
            store_name=store_name,
            is_online=True,
            last_checked_at=now,
        )
        db.add(connection)

    db.commit()
    logger.info("Evotor webhook: saved token for evotor_user_id=%s", payload.userId)

    return JSONResponse({"status": "ok"})


@router.post("/token")
async def evotor_token_manual(
    request: Request,
    db: Session = Depends(get_db),
    user: User | None = Depends(get_current_user),
):
    """Allow user to manually paste their Evotor token."""
    if not user:
        return RedirectResponse("/login", 303)

    form = await request.form()
    token = (form.get("token") or "").strip()
    if not token:
        return RedirectResponse("/evotor?error=empty_token", 303)

    now = datetime.utcnow()

    # Fetch store info
    store_id = None
    store_name = None
    try:
        async with httpx.AsyncClient() as client:
            stores_response = await client.get(
                EVOTOR_STORES_URL,
                headers={"Authorization": f"Bearer {token}"},
                timeout=15,
            )
            if stores_response.status_code == 200:
                stores = stores_response.json()
                items = stores.get("items", stores) if isinstance(stores, dict) else stores
                if items:
                    store_id = items[0].get("uuid") or items[0].get("id")
                    store_name = items[0].get("name")
            elif stores_response.status_code == 401:
                return RedirectResponse("/evotor?error=invalid_token", 303)
    except Exception:
        pass

    connection = db.query(EvotorConnection).filter(EvotorConnection.user_id == user.id).first()
    if connection:
        connection.access_token = token
        connection.store_id = store_id
        connection.store_name = store_name
        connection.is_online = True
        connection.last_checked_at = now
        connection.updated_at = now
    else:
        connection = EvotorConnection(
            user_id=user.id,
            access_token=token,
            store_id=store_id,
            store_name=store_name,
            is_online=True,
            last_checked_at=now,
        )
        db.add(connection)
    db.commit()

    return RedirectResponse("/connections", 303)


@router.post("/disconnect")
async def evotor_disconnect(
    request: Request,
    db: Session = Depends(get_db),
    user: User | None = Depends(get_current_user),
):
    if not user:
        return RedirectResponse("/login", 303)

    connection = db.query(EvotorConnection).filter(EvotorConnection.user_id == user.id).first()
    if connection:
        db.delete(connection)
        db.commit()

    return RedirectResponse("/connections", 303)