from fastapi import APIRouter, Request, Depends
from fastapi.responses import RedirectResponse
from fastapi.templating import Jinja2Templates
from sqlalchemy.orm import Session

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

router = APIRouter()
templates = Jinja2Templates(directory="web/templates")

SERVICE_TYPES = [
    {
        "type": "evotor",
        "name": "Эвотор",
        "icon": "bi-shop",
        "description": "Подключите кассу Эвотор для синхронизации каталога товаров.",
        "configure_url": "/evotor",
        "connect_url": "/evotor",
    },
    {
        "type": "vk",
        "name": "ВКонтакте",
        "icon": "bi-bag",
        "description": "Подключите аккаунт ВКонтакте для публикации товаров в вашу группу.",
        "configure_url": "/vk",
        "connect_url": "/vk/connect",
    },
]


def _get_connection(svc_type: str, evotor, vk):
    if svc_type == "evotor":
        return evotor
    if svc_type == "vk":
        return vk
    return None


def _get_details(svc_type: str, conn):
    if conn is None:
        return None
    if svc_type == "evotor":
        return conn.store_name
    if svc_type == "vk":
        return f"{conn.first_name} {conn.last_name}".strip() if conn.first_name else None
    return None


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

    evotor = db.query(EvotorConnection).filter(EvotorConnection.user_id == user.id).first()
    vk = db.query(VkConnection).filter(VkConnection.user_id == user.id).first()

    connected = []
    for svc in SERVICE_TYPES:
        conn = _get_connection(svc["type"], evotor, vk)
        if conn is not None:
            connected.append({
                **svc,
                "is_online": conn.is_online,
                "last_checked_at": conn.last_checked_at,
                "details": _get_details(svc["type"], conn),
            })

    return templates.TemplateResponse("connections.html", {
        "request": request,
        "user": user,
        "connections": connected,
    })


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

    evotor = db.query(EvotorConnection).filter(EvotorConnection.user_id == user.id).first()
    vk = db.query(VkConnection).filter(VkConnection.user_id == user.id).first()

    available = [
        svc for svc in SERVICE_TYPES
        if _get_connection(svc["type"], evotor, vk) is None
    ]

    return templates.TemplateResponse("connections_add.html", {
        "request": request,
        "user": user,
        "available": available,
    })


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

    svc_type = request.query_params.get("type")
    if svc_type == "evotor":
        conn = db.query(EvotorConnection).filter(EvotorConnection.user_id == user.id).first()
    elif svc_type == "vk":
        conn = db.query(VkConnection).filter(VkConnection.user_id == user.id).first()
    else:
        conn = None

    if conn:
        db.delete(conn)
        db.commit()

    return RedirectResponse("/connections", 303)